kits/interface/ColumnListView.cpp

/*
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*/

/*******************************************************************************
/
/	File:			ColumnListView.cpp
/
/   Description:    Experimental multi-column list view.
/
/	Copyright 2000+, Be Incorporated, All Rights Reserved
/					 By Jeff Bush
/
*******************************************************************************/

#include "ColumnListView.h"

#include <typeinfo>

#include <algorithm>
#include <stdio.h>
#include <stdlib.h>

#include <Application.h>
#include <Bitmap.h>
#include <ControlLook.h>
#include <Cursor.h>
#include <Debug.h>
#include <GraphicsDefs.h>
#include <LayoutUtils.h>
#include <MenuItem.h>
#include <PopUpMenu.h>
#include <Region.h>
#include <ScrollBar.h>
#include <String.h>
#include <SupportDefs.h>
#include <Window.h>

#include <ObjectListPrivate.h>

#include "ObjectList.h"


#define DOUBLE_BUFFERED_COLUMN_RESIZE 1
#define SMART_REDRAW 1
#define DRAG_TITLE_OUTLINE 1
#define CONSTRAIN_CLIPPING_REGION 1
#define LOWER_SCROLLBAR 0


namespace BPrivate {

static const unsigned char kDownSortArrow8x8[] = {
	0xff, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff,
	0xff, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff,
	0xff, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff,
	0xff, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
	0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
	0xff, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff,
	0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff
};

static const unsigned char kUpSortArrow8x8[] = {
	0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff,
	0xff, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff,
	0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
	0xff, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff,
	0xff, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff,
	0xff, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff,
	0xff, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff
};

static const unsigned char kDownSortArrow8x8Invert[] = {
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0xff, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0xff, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0xff, 0xff, 0x1f, 0x1f, 0x1f, 0xff, 0xff, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xff, 0xff
};

static const unsigned char kUpSortArrow8x8Invert[] = {
	0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xff, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0xff, 0xff, 0x1f, 0x1f, 0x1f, 0xff, 0xff, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0xff, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0xff, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0xff,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};

static const float kTintedLineTint = 1.04;
static const float kTintedLineTintDark = 0.90;


static const float kMinTitleHeight = 16.0;
static const float kMinRowHeight = 16.0;
static const float kTitleSpacing = 1.4;
static const float kRowSpacing = 1.4;
static const float kLatchWidth = 15.0;

static const int32 kMaxDepth = 1024;
static const float kLeftMargin = kLatchWidth;
static const float kRightMargin = 8;
static const float kOutlineLevelIndent = kLatchWidth;
static const float kColumnResizeAreaWidth = 10.0;
static const float kRowDragSensitivity = 5.0;
static const float kDoubleClickMoveSensitivity = 4.0;
static const float kSortIndicatorWidth = 9.0;
static const float kDropHighlightLineHeight = 2.0;

static const uint32 kToggleColumn = 'BTCL';


#ifdef DOUBLE_BUFFERED_COLUMN_RESIZE

class ColumnResizeBufferView : public BView
{
public:
							ColumnResizeBufferView();
	virtual					~ColumnResizeBufferView();
			void			UpdateMaxWidth(float width);
			void			UpdateMaxHeight(float height);
			bool			Lock();
			void			Unlock();
			const BBitmap* 	Bitmap();
private:
			void			_InitBitmap();
			void			_FreeBitmap();

			BBitmap*		fDrawBuffer;
};

#endif


class BRowContainer : public BObjectList<BRow>
{
};


class TitleView : public BView {
	typedef BView _inherited;
public:
								TitleView(BRect frame, OutlineView* outlineView,
									BList* visibleColumns, BList* sortColumns,
									BColumnListView* masterView,
									uint32 resizingMode);
	virtual						~TitleView();

			void				ColumnAdded(BColumn* column);
			void				ColumnResized(BColumn* column, float oldWidth);
			void				SetColumnVisible(BColumn* column, bool visible);

	virtual	void				Draw(BRect updateRect);
	virtual	void				ScrollTo(BPoint where);
	virtual	void				MessageReceived(BMessage* message);
	virtual	void				MouseDown(BPoint where);
	virtual	void				MouseMoved(BPoint where, uint32 transit,
									const BMessage* dragMessage);
	virtual	void				MouseUp(BPoint where);
	virtual	void				FrameResized(float width, float height);

			void				MoveColumn(BColumn* column, int32 index);
			void				SetColumnFlags(column_flags flags);

			void				SetEditMode(bool state)
									{ fEditMode = state; }

			float				MarginWidth() const;

private:
			void				GetTitleRect(BColumn* column, BRect* _rect);
			int32				FindColumn(BPoint where, float* _leftEdge);
			void				FixScrollBar(bool scrollToFit);
			void				DragSelectedColumn(BPoint where);
			void				ResizeSelectedColumn(BPoint where,
									bool preferred = false);
			void				ComputeDragBoundries(BColumn* column,
									BPoint where);
			void				DrawTitle(BView* view, BRect frame,
									BColumn* column, bool depressed);

			float				_VirtualWidth() const;

			OutlineView*		fOutlineView;
			BList*				fColumns;
			BList*				fSortColumns;
//			float				fColumnsWidth;
			BRect				fVisibleRect;


			enum {
				INACTIVE,
				RESIZING_COLUMN,
				PRESSING_COLUMN,
				DRAG_COLUMN_INSIDE_TITLE,
				DRAG_COLUMN_OUTSIDE_TITLE
			}					fCurrentState;

			BPopUpMenu*			fColumnPop;
			BColumnListView*	fMasterView;
			bool				fEditMode;
			int32				fColumnFlags;

	// State information for resizing/dragging
			BColumn*			fSelectedColumn;
			BRect				fSelectedColumnRect;
			bool				fResizingFirstColumn;
			BPoint				fClickPoint; // offset within cell
			float				fLeftDragBoundry;
			float				fRightDragBoundry;
			BPoint				fCurrentDragPosition;


			BBitmap*			fUpSortArrow;
			BBitmap*			fDownSortArrow;

			BCursor*			fResizeCursor;
			BCursor*			fMinResizeCursor;
			BCursor*			fMaxResizeCursor;
			BCursor*			fColumnMoveCursor;
};


class OutlineView : public BView {
	typedef BView _inherited;
public:
								OutlineView(BRect, BList* visibleColumns,
									BList* sortColumns,
									BColumnListView* listView);
	virtual						~OutlineView();

	virtual void				Draw(BRect);
	const 	BRect&				VisibleRect() const;

			void				RedrawColumn(BColumn* column, float leftEdge,
									bool isFirstColumn);
			void 				StartSorting();
			float				GetColumnPreferredWidth(BColumn* column);

			void				AddRow(BRow*, int32 index, BRow* TheRow);
			BRow*				CurrentSelection(BRow* lastSelected) const;
			void 				ToggleFocusRowSelection(bool selectRange);
			void 				ToggleFocusRowOpen();
			void 				ChangeFocusRow(bool up, bool updateSelection,
									bool addToCurrentSelection);
			void 				MoveFocusToVisibleRect();
			void 				ExpandOrCollapse(BRow* parent, bool expand);
			void 				RemoveRow(BRow*);
			BRowContainer*		RowList();
			void				UpdateRow(BRow*);
			bool				FindParent(BRow* row, BRow** _parent,
									bool* _isVisible);
			int32				IndexOf(BRow* row);
			void				Deselect(BRow*);
			void				AddToSelection(BRow*);
			void				DeselectAll();
			BRow*				FocusRow() const;
			void				SetFocusRow(BRow* row, bool select);
			BRow*				FindRow(float ypos, int32* _indent,
									float* _top);
			bool				FindRect(const BRow* row, BRect* _rect);
			void				ScrollTo(const BRow* row);

			void				Clear();
			void				SetSelectionMode(list_view_type type);
			list_view_type		SelectionMode() const;
			void				SetMouseTrackingEnabled(bool);
			void				FixScrollBar(bool scrollToFit);
			void				SetEditMode(bool state)
									{ fEditMode = state; }

	virtual void				FrameResized(float width, float height);
	virtual void				ScrollTo(BPoint where);
	virtual void				MouseDown(BPoint where);
	virtual void				MouseMoved(BPoint where, uint32 transit,
									const BMessage* dragMessage);
	virtual void				MouseUp(BPoint where);
	virtual void				MessageReceived(BMessage* message);

#if DOUBLE_BUFFERED_COLUMN_RESIZE
			ColumnResizeBufferView* ResizeBufferView();
#endif

private:
			bool				SortList(BRowContainer* list, bool isVisible);
	static	int32				DeepSortThreadEntry(void* outlineView);
			void				DeepSort();
			void				SelectRange(BRow* start, BRow* end);
			int32				CompareRows(BRow* row1, BRow* row2);
			void				AddSorted(BRowContainer* list, BRow* row);
			void				RecursiveDeleteRows(BRowContainer* list,
									bool owner);
			void				InvalidateCachedPositions();
			bool				FindVisibleRect(BRow* row, BRect* _rect);

			BList*				fColumns;
			BList*				fSortColumns;
			float				fItemsHeight;
			BRowContainer		fRows;
			BRect				fVisibleRect;

#if DOUBLE_BUFFERED_COLUMN_RESIZE
			ColumnResizeBufferView* fResizeBufferView;
#endif

			BRow*				fFocusRow;
			BRect				fFocusRowRect;
			BRow*				fRollOverRow;

			BRow				fSelectionListDummyHead;
			BRow*				fLastSelectedItem;
			BRow*				fFirstSelectedItem;

			thread_id			fSortThread;
			int32				fNumSorted;
			bool				fSortCancelled;

			enum CurrentState {
				INACTIVE,
				LATCH_CLICKED,
				ROW_CLICKED,
				DRAGGING_ROWS
			};

			CurrentState		fCurrentState;


			BColumnListView*	fMasterView;
			list_view_type		fSelectionMode;
			bool				fTrackMouse;
			BField*				fCurrentField;
			BRow*				fCurrentRow;
			BColumn*			fCurrentColumn;
			bool				fMouseDown;
			BRect				fFieldRect;
			int32				fCurrentCode;
			bool				fEditMode;

	// State information for mouse/keyboard interaction
			BPoint				fClickPoint;
			bool				fDragging;
			int32				fClickCount;
			BRow*				fTargetRow;
			float				fTargetRowTop;
			BRect				fLatchRect;
			float				fDropHighlightY;

	friend class RecursiveOutlineIterator;
};


class RecursiveOutlineIterator {
public:
								RecursiveOutlineIterator(
									BRowContainer* container,
									bool openBranchesOnly = true);

			BRow*				CurrentRow() const;
			int32				CurrentLevel() const;
			void				GoToNext();

private:
			struct {
				BRowContainer* fRowSet;
				int32 fIndex;
				int32 fDepth;
			}					fStack[kMaxDepth];

			int32				fStackIndex;
			BRowContainer*		fCurrentList;
			int32				fCurrentListIndex;
			int32				fCurrentListDepth;
			bool				fOpenBranchesOnly;
};

}	// namespace BPrivate


using namespace BPrivate;


#ifdef DOUBLE_BUFFERED_COLUMN_RESIZE

ColumnResizeBufferView::ColumnResizeBufferView()
	: BView(BRect(0, 0, 600, 35), "double_buffer_view", B_FOLLOW_ALL_SIDES, 0), fDrawBuffer(NULL)
{
	_InitBitmap();
}


ColumnResizeBufferView::~ColumnResizeBufferView()
{
	_FreeBitmap();
}


void
ColumnResizeBufferView::UpdateMaxWidth(float width)
{
	Lock();
	BRect bounds = Bounds();
	Unlock();

	if (width > bounds.Width()) {
		Lock();
		ResizeTo(width, bounds.Height());
		Unlock();
		_InitBitmap();
	}
}


void
ColumnResizeBufferView::UpdateMaxHeight(float height)
{
	Lock();
	BRect bounds = Bounds();
	Unlock();

	if (height > bounds.Height()) {
		Lock();
		ResizeTo(bounds.Width(), height);
		Unlock();
		_InitBitmap();
	}
}


bool
ColumnResizeBufferView::Lock()
{
	return fDrawBuffer->Lock();
}


void
ColumnResizeBufferView::Unlock()
{
	fDrawBuffer->Unlock();
}


const BBitmap*
ColumnResizeBufferView::Bitmap()
{
	return fDrawBuffer;
}


void
ColumnResizeBufferView::_InitBitmap()
{
	_FreeBitmap();

	fDrawBuffer = new BBitmap(Bounds(), B_RGB32, true);
	fDrawBuffer->Lock();
	fDrawBuffer->AddChild(this);
	fDrawBuffer->Unlock();
}


void
ColumnResizeBufferView::_FreeBitmap()
{
	if (fDrawBuffer) {
		fDrawBuffer->Lock();
		fDrawBuffer->RemoveChild(this);
		fDrawBuffer->Unlock();
		delete fDrawBuffer;
		fDrawBuffer = NULL;
	}
}

#endif


BField::BField()
{
}


BField::~BField()
{
}


// #pragma mark -


void
BColumn::MouseMoved(BColumnListView* /*parent*/, BRow* /*row*/,
	BField* /*field*/, BRect /*field_rect*/, BPoint/*point*/,
	uint32 /*buttons*/, int32 /*code*/)
{
}


void
BColumn::MouseDown(BColumnListView* /*parent*/, BRow* /*row*/,
	BField* /*field*/, BRect /*field_rect*/, BPoint /*point*/,
	uint32 /*buttons*/)
{
}


void
BColumn::MouseUp(BColumnListView* /*parent*/, BRow* /*row*/, BField* /*field*/)
{
}


// #pragma mark -


BRow::BRow()
	:
	fChildList(NULL),
	fIsExpanded(false),
	fHeight(std::max(kMinRowHeight,
		ceilf(be_plain_font->Size() * kRowSpacing))),
	fNextSelected(NULL),
	fPrevSelected(NULL),
	fParent(NULL),
	fList(NULL)
{
}


BRow::BRow(float height)
	:
	fChildList(NULL),
	fIsExpanded(false),
	fHeight(height),
	fNextSelected(NULL),
	fPrevSelected(NULL),
	fParent(NULL),
	fList(NULL)
{
}


BRow::~BRow()
{
	while (true) {
		BField* field = (BField*) fFields.RemoveItem((int32)0);
		if (field == 0)
			break;

		delete field;
	}
}


bool
BRow::HasLatch() const
{
	return fChildList != 0;
}


int32
BRow::CountFields() const
{
	return fFields.CountItems();
}


BField*
BRow::GetField(int32 index)
{
	return (BField*)fFields.ItemAt(index);
}


const BField*
BRow::GetField(int32 index) const
{
	return (const BField*)fFields.ItemAt(index);
}


void
BRow::SetField(BField* field, int32 logicalFieldIndex)
{
	if (fFields.ItemAt(logicalFieldIndex) != 0)
		delete (BField*)fFields.RemoveItem(logicalFieldIndex);

	if (NULL != fList) {
		ValidateField(field, logicalFieldIndex);
		Invalidate();
	}

	fFields.AddItem(field, logicalFieldIndex);
}


float
BRow::Height() const
{
	return fHeight;
}


bool
BRow::IsExpanded() const
{
	return fIsExpanded;
}


bool
BRow::IsSelected() const
{
	return fPrevSelected != NULL;
}


void
BRow::Invalidate()
{
	if (fList != NULL)
		fList->InvalidateRow(this);
}


void
BRow::ValidateFields() const
{
	for (int32 i = 0; i < CountFields(); i++)
		ValidateField(GetField(i), i);
}


void
BRow::ValidateField(const BField* field, int32 logicalFieldIndex) const
{
	// The Fields may be moved by the user, but the logicalFieldIndexes
	// do not change, so we need to map them over when checking the
	// Field types.
	BColumn* column = NULL;
	int32 items = fList->CountColumns();
	for (int32 i = 0 ; i < items; ++i) {
		column = fList->ColumnAt(i);
		if(column->LogicalFieldNum() == logicalFieldIndex )
			break;
	}

	if (column == NULL) {
		BString dbmessage("\n\n\tThe parent BColumnListView does not have "
			"\n\ta BColumn at the logical field index ");
		dbmessage << logicalFieldIndex << ".\n";
		puts(dbmessage.String());
	} else {
		if (!column->AcceptsField(field)) {
			BString dbmessage("\n\n\tThe BColumn of type ");
			dbmessage << typeid(*column).name() << "\n\tat logical field index "
				<< logicalFieldIndex << "\n\tdoes not support the field type "
				<< typeid(*field).name() << ".\n\n";
			debugger(dbmessage.String());
		}
	}
}


// #pragma mark -


BColumn::BColumn(float width, float minWidth, float maxWidth, alignment align)
	:
	fWidth(width),
	fMinWidth(minWidth),
	fMaxWidth(maxWidth),
	fVisible(true),
	fList(0),
	fShowHeading(true),
	fAlignment(align)
{
}


BColumn::~BColumn()
{
}


float
BColumn::Width() const
{
	return fWidth;
}


void
BColumn::SetWidth(float width)
{
	fWidth = width;
}


float
BColumn::MinWidth() const
{
	return fMinWidth;
}


float
BColumn::MaxWidth() const
{
	return fMaxWidth;
}


void
BColumn::DrawTitle(BRect, BView*)
{
}


void
BColumn::DrawField(BField*, BRect, BView*)
{
}


int
BColumn::CompareFields(BField*, BField*)
{
	return 0;
}


void
BColumn::GetColumnName(BString* into) const
{
	*into = "(Unnamed)";
}


float
BColumn::GetPreferredWidth(BField* field, BView* parent) const
{
	return fWidth;
}


bool
BColumn::IsVisible() const
{
	return fVisible;
}


void
BColumn::SetVisible(bool visible)
{
	if (fList && (fVisible != visible))
		fList->SetColumnVisible(this, visible);
}


bool
BColumn::ShowHeading() const
{
	return fShowHeading;
}


void
BColumn::SetShowHeading(bool state)
{
	fShowHeading = state;
}


alignment
BColumn::Alignment() const
{
	return fAlignment;
}


void
BColumn::SetAlignment(alignment align)
{
	fAlignment = align;
}


bool
BColumn::WantsEvents() const
{
	return fWantsEvents;
}


void
BColumn::SetWantsEvents(bool state)
{
	fWantsEvents = state;
}


int32
BColumn::LogicalFieldNum() const
{
	return fFieldID;
}


bool
BColumn::AcceptsField(const BField*) const
{
	return true;
}


// #pragma mark -


BColumnListView::BColumnListView(BRect rect, const char* name,
	uint32 resizingMode, uint32 flags, border_style border,
	bool showHorizontalScrollbar)
	:
	BView(rect, name, resizingMode,
		flags | B_WILL_DRAW | B_FRAME_EVENTS | B_FULL_UPDATE_ON_RESIZE),
	fStatusView(NULL),
	fSelectionMessage(NULL),
	fSortingEnabled(true),
	fLatchWidth(kLatchWidth),
	fBorderStyle(border),
	fShowingHorizontalScrollBar(showHorizontalScrollbar)
{
	_Init();
}


BColumnListView::BColumnListView(const char* name, uint32 flags,
	border_style border, bool showHorizontalScrollbar)
	:
	BView(name, flags | B_WILL_DRAW | B_FRAME_EVENTS | B_FULL_UPDATE_ON_RESIZE),
	fStatusView(NULL),
	fSelectionMessage(NULL),
	fSortingEnabled(true),
	fLatchWidth(kLatchWidth),
	fBorderStyle(border),
	fShowingHorizontalScrollBar(showHorizontalScrollbar)
{
	_Init();
}


BColumnListView::~BColumnListView()
{
	while (BColumn* column = (BColumn*)fColumns.RemoveItem((int32)0))
		delete column;
}


bool
BColumnListView::InitiateDrag(BPoint, bool)
{
	return false;
}


void
BColumnListView::MessageDropped(BMessage*, BPoint)
{
}


void
BColumnListView::ExpandOrCollapse(BRow* row, bool Open)
{
	fOutlineView->ExpandOrCollapse(row, Open);
}


status_t
BColumnListView::Invoke(BMessage* message)
{
	if (message == 0)
		message = Message();

	return BInvoker::Invoke(message);
}


void
BColumnListView::ItemInvoked()
{
	Invoke();
}


void
BColumnListView::SetInvocationMessage(BMessage* message)
{
	SetMessage(message);
}


BMessage*
BColumnListView::InvocationMessage() const
{
	return Message();
}


uint32
BColumnListView::InvocationCommand() const
{
	return Command();
}


BRow*
BColumnListView::FocusRow() const
{
	return fOutlineView->FocusRow();
}


void
BColumnListView::SetFocusRow(int32 Index, bool Select)
{
	SetFocusRow(RowAt(Index), Select);
}


void
BColumnListView::SetFocusRow(BRow* row, bool Select)
{
	fOutlineView->SetFocusRow(row, Select);
}


void
BColumnListView::SetMouseTrackingEnabled(bool Enabled)
{
	fOutlineView->SetMouseTrackingEnabled(Enabled);
}


list_view_type
BColumnListView::SelectionMode() const
{
	return fOutlineView->SelectionMode();
}


void
BColumnListView::Deselect(BRow* row)
{
	fOutlineView->Deselect(row);
}


void
BColumnListView::AddToSelection(BRow* row)
{
	fOutlineView->AddToSelection(row);
}


void
BColumnListView::DeselectAll()
{
	fOutlineView->DeselectAll();
}


BRow*
BColumnListView::CurrentSelection(BRow* lastSelected) const
{
	return fOutlineView->CurrentSelection(lastSelected);
}


void
BColumnListView::SelectionChanged()
{
	if (fSelectionMessage)
		Invoke(fSelectionMessage);
}


void
BColumnListView::SetSelectionMessage(BMessage* message)
{
	if (fSelectionMessage == message)
		return;

	delete fSelectionMessage;
	fSelectionMessage = message;
}


BMessage*
BColumnListView::SelectionMessage()
{
	return fSelectionMessage;
}


uint32
BColumnListView::SelectionCommand() const
{
	if (fSelectionMessage)
		return fSelectionMessage->what;

	return 0;
}


void
BColumnListView::SetSelectionMode(list_view_type mode)
{
	fOutlineView->SetSelectionMode(mode);
}


void
BColumnListView::SetSortingEnabled(bool enabled)
{
	fSortingEnabled = enabled;
	fSortColumns.MakeEmpty();
	fTitleView->Invalidate();
		// erase sort indicators
}


bool
BColumnListView::SortingEnabled() const
{
	return fSortingEnabled;
}


void
BColumnListView::SetSortColumn(BColumn* column, bool add, bool ascending)
{
	if (!SortingEnabled())
		return;

	if (!add)
		fSortColumns.MakeEmpty();

	if (!fSortColumns.HasItem(column))
		fSortColumns.AddItem(column);

	column->fSortAscending = ascending;
	fTitleView->Invalidate();
	fOutlineView->StartSorting();
}


void
BColumnListView::ClearSortColumns()
{
	fSortColumns.MakeEmpty();
	fTitleView->Invalidate();
		// erase sort indicators
}


void
BColumnListView::AddStatusView(BView* view)
{
	BRect bounds = Bounds();
	float width = view->Bounds().Width();
	if (width > bounds.Width() / 2)
		width = bounds.Width() / 2;

	fStatusView = view;

	Window()->BeginViewTransaction();
	fHorizontalScrollBar->ResizeBy(-(width + 1), 0);
	fHorizontalScrollBar->MoveBy((width + 1), 0);
	AddChild(view);

	BRect viewRect(bounds);
	viewRect.right = width;
	viewRect.top = viewRect.bottom - B_H_SCROLL_BAR_HEIGHT;
	if (fBorderStyle == B_PLAIN_BORDER)
		viewRect.OffsetBy(1, -1);
	else if (fBorderStyle == B_FANCY_BORDER)
		viewRect.OffsetBy(2, -2);

	view->SetResizingMode(B_FOLLOW_LEFT | B_FOLLOW_BOTTOM);
	view->ResizeTo(viewRect.Width(), viewRect.Height());
	view->MoveTo(viewRect.left, viewRect.top);
	Window()->EndViewTransaction();
}


BView*
BColumnListView::RemoveStatusView()
{
	if (fStatusView) {
		float width = fStatusView->Bounds().Width();
		Window()->BeginViewTransaction();
		fStatusView->RemoveSelf();
		fHorizontalScrollBar->MoveBy(-width, 0);
		fHorizontalScrollBar->ResizeBy(width, 0);
		Window()->EndViewTransaction();
	}

	BView* view = fStatusView;
	fStatusView = 0;
	return view;
}


void
BColumnListView::AddColumn(BColumn* column, int32 logicalFieldIndex)
{
	ASSERT(column != NULL);

	column->fList = this;
	column->fFieldID = logicalFieldIndex;

	// sanity check -- if there is already a field with this ID, remove it.
	for (int32 index = 0; index < fColumns.CountItems(); index++) {
		BColumn* existingColumn = (BColumn*) fColumns.ItemAt(index);
		if (existingColumn && existingColumn->fFieldID == logicalFieldIndex) {
			RemoveColumn(existingColumn);
			break;
		}
	}

	if (column->Width() < column->MinWidth())
		column->SetWidth(column->MinWidth());
	else if (column->Width() > column->MaxWidth())
		column->SetWidth(column->MaxWidth());

	fColumns.AddItem((void*) column);
	fTitleView->ColumnAdded(column);
}


void
BColumnListView::MoveColumn(BColumn* column, int32 index)
{
	ASSERT(column != NULL);
	fTitleView->MoveColumn(column, index);
}


void
BColumnListView::RemoveColumn(BColumn* column)
{
	if (fColumns.HasItem(column)) {
		SetColumnVisible(column, false);
		if (Window() != NULL)
			Window()->UpdateIfNeeded();
		fColumns.RemoveItem(column);
	}
}


int32
BColumnListView::CountColumns() const
{
	return fColumns.CountItems();
}


BColumn*
BColumnListView::ColumnAt(int32 field) const
{
	return (BColumn*) fColumns.ItemAt(field);
}


BColumn*
BColumnListView::ColumnAt(BPoint point) const
{
	float left = MAX(kLeftMargin, LatchWidth());

	for (int i = 0; BColumn* column = (BColumn*)fColumns.ItemAt(i); i++) {
		if (column == NULL || !column->IsVisible())
			continue;

		float right = left + column->Width();
		if (point.x >= left && point.x <= right)
			return column;

		left = right + 1;
	}

	return NULL;
}


void
BColumnListView::SetColumnVisible(BColumn* column, bool visible)
{
	fTitleView->SetColumnVisible(column, visible);
}


void
BColumnListView::SetColumnVisible(int32 index, bool isVisible)
{
	BColumn* column = ColumnAt(index);
	if (column != NULL)
		column->SetVisible(isVisible);
}


bool
BColumnListView::IsColumnVisible(int32 index) const
{
	BColumn* column = ColumnAt(index);
	if (column != NULL)
		return column->IsVisible();

	return false;
}


void
BColumnListView::SetColumnFlags(column_flags flags)
{
	fTitleView->SetColumnFlags(flags);
}


void
BColumnListView::ResizeColumnToPreferred(int32 index)
{
	BColumn* column = ColumnAt(index);
	if (column == NULL)
		return;

	// get the preferred column width
	float width = fOutlineView->GetColumnPreferredWidth(column);

	// set it
	float oldWidth = column->Width();
	column->SetWidth(width);

	fTitleView->ColumnResized(column, oldWidth);
	fOutlineView->Invalidate();
}


void
BColumnListView::ResizeAllColumnsToPreferred()
{
	int32 count = CountColumns();
	for (int32 i = 0; i < count; i++)
		ResizeColumnToPreferred(i);
}


const BRow*
BColumnListView::RowAt(int32 Index, BRow* parentRow) const
{
	if (parentRow == 0)
		return fOutlineView->RowList()->ItemAt(Index);

	return parentRow->fChildList ? parentRow->fChildList->ItemAt(Index) : NULL;
}


BRow*
BColumnListView::RowAt(int32 Index, BRow* parentRow)
{
	if (parentRow == 0)
		return fOutlineView->RowList()->ItemAt(Index);

	return parentRow->fChildList ? parentRow->fChildList->ItemAt(Index) : 0;
}


const BRow*
BColumnListView::RowAt(BPoint point) const
{
	float top;
	int32 indent;
	return fOutlineView->FindRow(point.y, &indent, &top);
}


BRow*
BColumnListView::RowAt(BPoint point)
{
	float top;
	int32 indent;
	return fOutlineView->FindRow(point.y, &indent, &top);
}


bool
BColumnListView::GetRowRect(const BRow* row, BRect* outRect) const
{
	return fOutlineView->FindRect(row, outRect);
}


bool
BColumnListView::FindParent(BRow* row, BRow** _parent, bool* _isVisible) const
{
	return fOutlineView->FindParent(row, _parent, _isVisible);
}


int32
BColumnListView::IndexOf(BRow* row)
{
	return fOutlineView->IndexOf(row);
}


int32
BColumnListView::CountRows(BRow* parentRow) const
{
	if (parentRow == 0)
		return fOutlineView->RowList()->CountItems();
	if (parentRow->fChildList)
		return parentRow->fChildList->CountItems();
	else
		return 0;
}


void
BColumnListView::AddRow(BRow* row, BRow* parentRow)
{
	AddRow(row, -1, parentRow);
}


void
BColumnListView::AddRow(BRow* row, int32 index, BRow* parentRow)
{
	row->fChildList = 0;
	row->fList = this;
	row->ValidateFields();
	fOutlineView->AddRow(row, index, parentRow);
}


void
BColumnListView::RemoveRow(BRow* row)
{
	fOutlineView->RemoveRow(row);
	row->fList = NULL;
}


void
BColumnListView::UpdateRow(BRow* row)
{
	fOutlineView->UpdateRow(row);
}


bool
BColumnListView::SwapRows(int32 index1, int32 index2, BRow* parentRow1,
	BRow* parentRow2)
{
	BRow* row1 = NULL;
	BRow* row2 = NULL;

	BRowContainer* container1 = NULL;
	BRowContainer* container2 = NULL;

	if (parentRow1 == NULL)
		container1 = fOutlineView->RowList();
	else
		container1 = parentRow1->fChildList;

	if (container1 == NULL)
		return false;

	if (parentRow2 == NULL)
		container2 = fOutlineView->RowList();
	else
		container2 = parentRow2->fChildList;

	if (container2 == NULL)
		return false;

	row1 = container1->ItemAt(index1);

	if (row1 == NULL)
		return false;

	row2 = container2->ItemAt(index2);

	if (row2 == NULL)
		return false;

	container1->ReplaceItem(index2, row1);
	container2->ReplaceItem(index1, row2);

	BRect rect1;
	BRect rect2;
	BRect rect;

	fOutlineView->FindRect(row1, &rect1);
	fOutlineView->FindRect(row2, &rect2);

	rect = rect1 | rect2;

	fOutlineView->Invalidate(rect);

	return true;
}


void
BColumnListView::ScrollTo(const BRow* row)
{
	fOutlineView->ScrollTo(row);
}


void
BColumnListView::ScrollTo(BPoint point)
{
	fOutlineView->ScrollTo(point);
}


void
BColumnListView::Clear()
{
	fOutlineView->Clear();
}


void
BColumnListView::InvalidateRow(BRow* row)
{
	BRect updateRect;
	GetRowRect(row, &updateRect);
	fOutlineView->Invalidate(updateRect);
}


// This method is deprecated.
void
BColumnListView::SetFont(const BFont* font, uint32 mask)
{
	fOutlineView->SetFont(font, mask);
	fTitleView->SetFont(font, mask);
}


void
BColumnListView::SetFont(ColumnListViewFont font_num, const BFont* font,
	uint32 mask)
{
	switch (font_num) {
		case B_FONT_ROW:
			fOutlineView->SetFont(font, mask);
			break;

		case B_FONT_HEADER:
			fTitleView->SetFont(font, mask);
			break;

		default:
			ASSERT(false);
			break;
	}
}


void
BColumnListView::GetFont(ColumnListViewFont font_num, BFont* font) const
{
	switch (font_num) {
		case B_FONT_ROW:
			fOutlineView->GetFont(font);
			break;

		case B_FONT_HEADER:
			fTitleView->GetFont(font);
			break;

		default:
			ASSERT(false);
			break;
	}
}


void
BColumnListView::SetColor(ColumnListViewColor colorIndex, const rgb_color color)
{
	if ((int)colorIndex < 0) {
		ASSERT(false);
		colorIndex = (ColumnListViewColor)0;
	}

	if ((int)colorIndex >= (int)B_COLOR_TOTAL) {
		ASSERT(false);
		colorIndex = (ColumnListViewColor)(B_COLOR_TOTAL - 1);
	}

	fColorList[colorIndex] = color;
	fCustomColors = true;
}


void
BColumnListView::ResetColors()
{
	fCustomColors = false;
	_UpdateColors();
	Invalidate();
}


rgb_color
BColumnListView::Color(ColumnListViewColor colorIndex) const
{
	if ((int)colorIndex < 0) {
		ASSERT(false);
		colorIndex = (ColumnListViewColor)0;
	}

	if ((int)colorIndex >= (int)B_COLOR_TOTAL) {
		ASSERT(false);
		colorIndex = (ColumnListViewColor)(B_COLOR_TOTAL - 1);
	}

	return fColorList[colorIndex];
}


void
BColumnListView::SetHighColor(rgb_color color)
{
	BView::SetHighColor(color);
//	fOutlineView->Invalidate();
		// Redraw with the new color.
		// Note that this will currently cause an infinite loop, refreshing
		// over and over. A better solution is needed.
}


void
BColumnListView::SetSelectionColor(rgb_color color)
{
	fColorList[B_COLOR_SELECTION] = color;
	fCustomColors = true;
}


void
BColumnListView::SetBackgroundColor(rgb_color color)
{
	fColorList[B_COLOR_BACKGROUND] = color;
	fCustomColors = true;
	fOutlineView->Invalidate();
		// repaint with new color
}


void
BColumnListView::SetEditColor(rgb_color color)
{
	fColorList[B_COLOR_EDIT_BACKGROUND] = color;
	fCustomColors = true;
}


const rgb_color
BColumnListView::SelectionColor() const
{
	return fColorList[B_COLOR_SELECTION];
}


const rgb_color
BColumnListView::BackgroundColor() const
{
	return fColorList[B_COLOR_BACKGROUND];
}


const rgb_color
BColumnListView::EditColor() const
{
	return fColorList[B_COLOR_EDIT_BACKGROUND];
}


BPoint
BColumnListView::SuggestTextPosition(const BRow* row,
	const BColumn* inColumn) const
{
	BRect rect(GetFieldRect(row, inColumn));

	font_height fh;
	fOutlineView->GetFontHeight(&fh);
	float baseline = floor(rect.top + fh.ascent
		+ (rect.Height() + 1 - (fh.ascent + fh.descent)) / 2);
	return BPoint(rect.left + 8, baseline);
}


BRect
BColumnListView::GetFieldRect(const BRow* row, const BColumn* inColumn) const
{
	BRect rect;
	GetRowRect(row, &rect);
	if (inColumn != NULL) {
		float leftEdge = MAX(kLeftMargin, LatchWidth());
		for (int index = 0; index < fColumns.CountItems(); index++) {
			BColumn* column = (BColumn*) fColumns.ItemAt(index);
			if (column == NULL || !column->IsVisible())
				continue;

			if (column == inColumn) {
				rect.left = leftEdge;
				rect.right = rect.left + column->Width();
				break;
			}

			leftEdge += column->Width() + 1;
		}
	}

	return rect;
}


void
BColumnListView::SetLatchWidth(float width)
{
	fLatchWidth = width;
	Invalidate();
}


float
BColumnListView::LatchWidth() const
{
	return fLatchWidth;
}

void
BColumnListView::DrawLatch(BView* view, BRect rect, LatchType position, BRow*)
{
	const int32 rectInset = 4;

	// make square
	int32 sideLen = rect.IntegerWidth();
	if (sideLen > rect.IntegerHeight())
		sideLen = rect.IntegerHeight();

	// make center
	int32 halfWidth  = rect.IntegerWidth() / 2;
	int32 halfHeight = rect.IntegerHeight() / 2;
	int32 halfSide   = sideLen / 2;

	float left = rect.left + halfWidth  - halfSide;
	float top  = rect.top  + halfHeight - halfSide;

	BRect itemRect(left, top, left + sideLen, top + sideLen);

	// Why it is a pixel high? I don't know.
	itemRect.OffsetBy(0, -1);

	itemRect.InsetBy(rectInset, rectInset);

	// make it an odd number of pixels wide, the latch looks better this way
	if ((itemRect.IntegerWidth() % 2) == 1) {
		itemRect.right += 1;
		itemRect.bottom += 1;
	}

	rgb_color highColor = view->HighColor();
	if (highColor.IsLight())
		view->SetHighColor(make_color(0, 0, 0));
	else
		view->SetHighColor(make_color(255, 255, 255));

	switch (position) {
		case B_OPEN_LATCH:
			view->StrokeRect(itemRect);
			view->StrokeLine(
				BPoint(itemRect.left + 2,
					(itemRect.top + itemRect.bottom) / 2),
				BPoint(itemRect.right - 2,
					(itemRect.top + itemRect.bottom) / 2));
			break;

		case B_PRESSED_LATCH:
			view->StrokeRect(itemRect);
			view->StrokeLine(
				BPoint(itemRect.left + 2,
					(itemRect.top + itemRect.bottom) / 2),
				BPoint(itemRect.right - 2,
					(itemRect.top + itemRect.bottom) / 2));
			view->StrokeLine(
				BPoint((itemRect.left + itemRect.right) / 2,
					itemRect.top +  2),
				BPoint((itemRect.left + itemRect.right) / 2,
					itemRect.bottom - 2));
			view->InvertRect(itemRect);
			break;

		case B_CLOSED_LATCH:
			view->StrokeRect(itemRect);
			view->StrokeLine(
				BPoint(itemRect.left + 2,
					(itemRect.top + itemRect.bottom) / 2),
				BPoint(itemRect.right - 2,
					(itemRect.top + itemRect.bottom) / 2));
			view->StrokeLine(
				BPoint((itemRect.left + itemRect.right) / 2,
					itemRect.top +  2),
				BPoint((itemRect.left + itemRect.right) / 2,
					itemRect.bottom - 2));
			break;

		case B_NO_LATCH:
		default:
			// No drawing
			break;
	}

	view->SetHighColor(highColor);
}


void
BColumnListView::MakeFocus(bool isFocus)
{
	if (fBorderStyle != B_NO_BORDER) {
		// Redraw focus marks around view
		Invalidate();
		fHorizontalScrollBar->SetBorderHighlighted(isFocus);
		fVerticalScrollBar->SetBorderHighlighted(isFocus);
	}

	BView::MakeFocus(isFocus);
}


void
BColumnListView::MessageReceived(BMessage* message)
{
	// Propagate mouse wheel messages down to child, so that it can
	// scroll.  Note we have done so, so we don't go into infinite
	// recursion if this comes back up here.
	if (message->what == B_MOUSE_WHEEL_CHANGED) {
		bool handled;
		if (message->FindBool("be:clvhandled", &handled) != B_OK) {
			message->AddBool("be:clvhandled", true);
			fOutlineView->MessageReceived(message);
			return;
		}
	} else if (message->what == B_COLORS_UPDATED) {
		// Todo: Is it worthwhile to optimize this?
		_UpdateColors();
	}

	BView::MessageReceived(message);
}


void
BColumnListView::KeyDown(const char* bytes, int32 numBytes)
{
	char key = bytes[0];
	switch (key) {
		case B_RIGHT_ARROW:
		case B_LEFT_ARROW:
		{
			if ((modifiers() & B_SHIFT_KEY) != 0) {
				float  minVal, maxVal;
				fHorizontalScrollBar->GetRange(&minVal, &maxVal);
				float smallStep, largeStep;
				fHorizontalScrollBar->GetSteps(&smallStep, &largeStep);
				float oldVal = fHorizontalScrollBar->Value();
				float newVal = oldVal;

				if (key == B_LEFT_ARROW)
					newVal -= smallStep;
				else if (key == B_RIGHT_ARROW)
					newVal += smallStep;

				if (newVal < minVal)
					newVal = minVal;
				else if (newVal > maxVal)
					newVal = maxVal;

				fHorizontalScrollBar->SetValue(newVal);
			} else {
				BRow* focusRow = fOutlineView->FocusRow();
				if (focusRow == NULL)
					break;

				bool isExpanded = focusRow->HasLatch()
					&& focusRow->IsExpanded();
				switch (key) {
					case B_LEFT_ARROW:
						if (isExpanded)
							fOutlineView->ToggleFocusRowOpen();
						else if (focusRow->fParent != NULL) {
							fOutlineView->DeselectAll();
							fOutlineView->SetFocusRow(focusRow->fParent, true);
							fOutlineView->ScrollTo(focusRow->fParent);
						}
						break;

					case B_RIGHT_ARROW:
						if (!isExpanded)
							fOutlineView->ToggleFocusRowOpen();
						else
							fOutlineView->ChangeFocusRow(false, true, false);
						break;
				}
			}
			break;
		}

		case B_DOWN_ARROW:
			fOutlineView->ChangeFocusRow(false,
				(modifiers() & B_CONTROL_KEY) == 0,
				(modifiers() & B_SHIFT_KEY) != 0);
			break;

		case B_UP_ARROW:
			fOutlineView->ChangeFocusRow(true,
				(modifiers() & B_CONTROL_KEY) == 0,
				(modifiers() & B_SHIFT_KEY) != 0);
			break;

		case B_PAGE_UP:
		case B_PAGE_DOWN:
		{
			float minValue, maxValue;
			fVerticalScrollBar->GetRange(&minValue, &maxValue);
			float smallStep, largeStep;
			fVerticalScrollBar->GetSteps(&smallStep, &largeStep);
			float currentValue = fVerticalScrollBar->Value();
			float newValue = currentValue;

			if (key == B_PAGE_UP)
				newValue -= largeStep;
			else
				newValue += largeStep;

			if (newValue > maxValue)
				newValue = maxValue;
			else if (newValue < minValue)
				newValue = minValue;

			fVerticalScrollBar->SetValue(newValue);

			// Option + pgup or pgdn scrolls and changes the selection.
			if (modifiers() & B_OPTION_KEY)
				fOutlineView->MoveFocusToVisibleRect();

			break;
		}

		case B_ENTER:
			Invoke();
			break;

		case B_SPACE:
			fOutlineView->ToggleFocusRowSelection(
				(modifiers() & B_SHIFT_KEY) != 0);
			break;

		case '+':
			fOutlineView->ToggleFocusRowOpen();
			break;

		default:
			BView::KeyDown(bytes, numBytes);
	}
}


void
BColumnListView::AttachedToWindow()
{
	if (!Messenger().IsValid())
		SetTarget(Window());

	if (SortingEnabled()) fOutlineView->StartSorting();
}


void
BColumnListView::WindowActivated(bool active)
{
	fOutlineView->Invalidate();
		// focus and selection appearance changes with focus

	Invalidate();
		// redraw focus marks around view
	BView::WindowActivated(active);
}


void
BColumnListView::Draw(BRect updateRect)
{
	BRect rect = Bounds();

	uint32 flags = 0;
	if (IsFocus() && Window()->IsActive())
		flags |= BControlLook::B_FOCUSED;

	rgb_color base = ui_color(B_PANEL_BACKGROUND_COLOR);

	BRect verticalScrollBarFrame;
	if (!fVerticalScrollBar->IsHidden())
		verticalScrollBarFrame = fVerticalScrollBar->Frame();

	BRect horizontalScrollBarFrame;
	if (!fHorizontalScrollBar->IsHidden())
		horizontalScrollBarFrame = fHorizontalScrollBar->Frame();

	if (fBorderStyle == B_NO_BORDER) {
		// We still draw the left/top border, but not focused.
		// The scrollbars cannot be displayed without frame and
		// it looks bad to have no frame only along the left/top
		// side.
		rgb_color borderColor = tint_color(base, B_DARKEN_2_TINT);
		SetHighColor(borderColor);
		StrokeLine(BPoint(rect.left, rect.bottom),
			BPoint(rect.left, rect.top));
		StrokeLine(BPoint(rect.left + 1, rect.top),
			BPoint(rect.right, rect.top));
	}

	be_control_look->DrawScrollViewFrame(this, rect, updateRect,
		verticalScrollBarFrame, horizontalScrollBarFrame,
		base, fBorderStyle, flags);

	if (fStatusView != NULL) {
		rect = Bounds();
		BRegion region(rect & fStatusView->Frame().InsetByCopy(-2, -2));
		ConstrainClippingRegion(&region);
		rect.bottom = fStatusView->Frame().top - 1;
		be_control_look->DrawScrollViewFrame(this, rect, updateRect,
			BRect(), BRect(), base, fBorderStyle, flags);
	}
}


void
BColumnListView::SaveState(BMessage* message)
{
	message->MakeEmpty();

	for (int32 i = 0; BColumn* column = (BColumn*)fColumns.ItemAt(i); i++) {
		message->AddInt32("ID", column->fFieldID);
		message->AddFloat("width", column->fWidth);
		message->AddBool("visible", column->fVisible);
	}

	message->AddBool("sortingenabled", fSortingEnabled);

	if (fSortingEnabled) {
		for (int32 i = 0; BColumn* column = (BColumn*)fSortColumns.ItemAt(i);
				i++) {
			message->AddInt32("sortID", column->fFieldID);
			message->AddBool("sortascending", column->fSortAscending);
		}
	}
}


void
BColumnListView::LoadState(BMessage* message)
{
	int32 id;
	for (int i = 0; message->FindInt32("ID", i, &id) == B_OK; i++) {
		for (int j = 0; BColumn* column = (BColumn*)fColumns.ItemAt(j); j++) {
			if (column->fFieldID == id) {
				// move this column to position 'i' and set its attributes
				MoveColumn(column, i);
				float width;
				if (message->FindFloat("width", i, &width) == B_OK)
					column->SetWidth(width);
				bool visible;
				if (message->FindBool("visible", i, &visible) == B_OK)
					column->SetVisible(visible);
			}
		}
	}
	bool b;
	if (message->FindBool("sortingenabled", &b) == B_OK) {
		SetSortingEnabled(b);
		for (int k = 0; message->FindInt32("sortID", k, &id) == B_OK; k++) {
			for (int j = 0; BColumn* column = (BColumn*)fColumns.ItemAt(j);
					j++) {
				if (column->fFieldID == id) {
					// add this column to the sort list
					bool value;
					if (message->FindBool("sortascending", k, &value) == B_OK)
						SetSortColumn(column, true, value);
				}
			}
		}
	}
}


void
BColumnListView::SetEditMode(bool state)
{
	fOutlineView->SetEditMode(state);
	fTitleView->SetEditMode(state);
}


void
BColumnListView::Refresh()
{
	if (LockLooper()) {
		Invalidate();
		fOutlineView->FixScrollBar (true);
		fOutlineView->Invalidate();
		Window()->UpdateIfNeeded();
		UnlockLooper();
	}
}


BSize
BColumnListView::MinSize()
{
	BSize size;
	size.width = 100;
	size.height = std::max(kMinTitleHeight,
		ceilf(be_plain_font->Size() * kTitleSpacing))
		+ 4 * B_H_SCROLL_BAR_HEIGHT;
	if (!fHorizontalScrollBar->IsHidden())
		size.height += fHorizontalScrollBar->Frame().Height() + 1;
	// TODO: Take border size into account

	return BLayoutUtils::ComposeSize(ExplicitMinSize(), size);
}


BSize
BColumnListView::PreferredSize()
{
	BSize size = MinSize();
	size.height += ceilf(be_plain_font->Size()) * 20;

	// return MinSize().width if there are no columns.
	int32 count = CountColumns();
	if (count > 0) {
		BRect titleRect;
		BRect outlineRect;
		BRect vScrollBarRect;
		BRect hScrollBarRect;
		_GetChildViewRects(Bounds(), titleRect, outlineRect, vScrollBarRect,
			hScrollBarRect);
		// Start with the extra width for border and scrollbars etc.
		size.width = titleRect.left - Bounds().left;
		size.width += Bounds().right - titleRect.right;

		// If we want all columns to be visible at their current width,
		// we also need to add the extra margin width that the TitleView
		// uses to compute its _VirtualWidth() for the horizontal scroll bar.
		size.width += fTitleView->MarginWidth();
		for (int32 i = 0; i < count; i++) {
			BColumn* column = ColumnAt(i);
			if (column != NULL)
				size.width += column->Width();
		}
	}

	return BLayoutUtils::ComposeSize(ExplicitPreferredSize(), size);
}


BSize
BColumnListView::MaxSize()
{
	BSize size(B_SIZE_UNLIMITED, B_SIZE_UNLIMITED);
	return BLayoutUtils::ComposeSize(ExplicitMaxSize(), size);
}


void
BColumnListView::LayoutInvalidated(bool descendants)
{
}


void
BColumnListView::DoLayout()
{
	if ((Flags() & B_SUPPORTS_LAYOUT) == 0)
		return;

	BRect titleRect;
	BRect outlineRect;
	BRect vScrollBarRect;
	BRect hScrollBarRect;
	_GetChildViewRects(Bounds(), titleRect, outlineRect, vScrollBarRect,
		hScrollBarRect);

	fTitleView->MoveTo(titleRect.LeftTop());
	fTitleView->ResizeTo(titleRect.Width(), titleRect.Height());

	fOutlineView->MoveTo(outlineRect.LeftTop());
	fOutlineView->ResizeTo(outlineRect.Width(), outlineRect.Height());

	fVerticalScrollBar->MoveTo(vScrollBarRect.LeftTop());
	fVerticalScrollBar->ResizeTo(vScrollBarRect.Width(),
		vScrollBarRect.Height());

	if (fStatusView != NULL) {
		BSize size = fStatusView->MinSize();
		float hScrollBarHeight = fHorizontalScrollBar->Frame().Height();

		if (size.height > hScrollBarHeight)
			size.height = hScrollBarHeight;
		if (size.width > Bounds().Width() / 2)
			size.width = floorf(Bounds().Width() / 2);

		BPoint offset(hScrollBarRect.LeftTop());

		if (fBorderStyle == B_PLAIN_BORDER) {
			offset += BPoint(0, 1);
		} else if (fBorderStyle == B_FANCY_BORDER) {
			offset += BPoint(-1, 2);
			size.height -= 1;
		}

		fStatusView->MoveTo(offset);
		fStatusView->ResizeTo(size.width, size.height);
		hScrollBarRect.left = offset.x + size.width + 1;
	}

	fHorizontalScrollBar->MoveTo(hScrollBarRect.LeftTop());
	fHorizontalScrollBar->ResizeTo(hScrollBarRect.Width(),
		hScrollBarRect.Height());

	fOutlineView->FixScrollBar(true);
}


void
BColumnListView::_Init()
{
	SetViewColor(B_TRANSPARENT_32_BIT);

	BRect bounds(Bounds());
	if (bounds.Width() <= 0)
		bounds.right = 100;

	if (bounds.Height() <= 0)
		bounds.bottom = 100;

	fCustomColors = false;
	_UpdateColors();

	BRect titleRect;
	BRect outlineRect;
	BRect vScrollBarRect;
	BRect hScrollBarRect;
	_GetChildViewRects(bounds, titleRect, outlineRect, vScrollBarRect,
		hScrollBarRect);

	fOutlineView = new OutlineView(outlineRect, &fColumns, &fSortColumns, this);
	AddChild(fOutlineView);


	fTitleView = new TitleView(titleRect, fOutlineView, &fColumns,
		&fSortColumns, this, B_FOLLOW_LEFT_RIGHT | B_FOLLOW_TOP);
	AddChild(fTitleView);

	fVerticalScrollBar = new BScrollBar(vScrollBarRect, "vertical_scroll_bar",
		fOutlineView, 0.0, bounds.Height(), B_VERTICAL);
	AddChild(fVerticalScrollBar);

	fHorizontalScrollBar = new BScrollBar(hScrollBarRect,
		"horizontal_scroll_bar", fTitleView, 0.0, bounds.Width(), B_HORIZONTAL);
	AddChild(fHorizontalScrollBar);

	if (!fShowingHorizontalScrollBar)
		fHorizontalScrollBar->Hide();

	fOutlineView->FixScrollBar(true);
}


void
BColumnListView::_UpdateColors()
{
	if (fCustomColors)
		return;

	fColorList[B_COLOR_BACKGROUND] = ui_color(B_LIST_BACKGROUND_COLOR);
	fColorList[B_COLOR_TEXT] = ui_color(B_LIST_ITEM_TEXT_COLOR);
	fColorList[B_COLOR_ROW_DIVIDER] = tint_color(
		ui_color(B_LIST_SELECTED_BACKGROUND_COLOR), B_DARKEN_2_TINT);
	fColorList[B_COLOR_SELECTION] = ui_color(B_LIST_SELECTED_BACKGROUND_COLOR);
	fColorList[B_COLOR_SELECTION_TEXT] =
		ui_color(B_LIST_SELECTED_ITEM_TEXT_COLOR);

	// For non focus selection uses the selection color as BListView
	fColorList[B_COLOR_NON_FOCUS_SELECTION] =
		ui_color(B_LIST_SELECTED_BACKGROUND_COLOR);

	// edit mode doesn't work very well
	fColorList[B_COLOR_EDIT_BACKGROUND] = tint_color(
		ui_color(B_LIST_SELECTED_BACKGROUND_COLOR), B_DARKEN_1_TINT);
	fColorList[B_COLOR_EDIT_BACKGROUND].alpha = 180;

	// Unused color
	fColorList[B_COLOR_EDIT_TEXT] = ui_color(B_LIST_SELECTED_ITEM_TEXT_COLOR);

	fColorList[B_COLOR_HEADER_BACKGROUND] = ui_color(B_PANEL_BACKGROUND_COLOR);
	fColorList[B_COLOR_HEADER_TEXT] = ui_color(B_PANEL_TEXT_COLOR);

	// Unused colors
	fColorList[B_COLOR_SEPARATOR_LINE] = ui_color(B_LIST_ITEM_TEXT_COLOR);
	fColorList[B_COLOR_SEPARATOR_BORDER] = ui_color(B_LIST_ITEM_TEXT_COLOR);
}


void
BColumnListView::_GetChildViewRects(const BRect& bounds, BRect& titleRect,
	BRect& outlineRect, BRect& vScrollBarRect, BRect& hScrollBarRect)
{
	const float vScrollBarWidth = be_control_look->GetScrollBarWidth(B_VERTICAL),
		hScrollBarHeight = be_control_look->GetScrollBarWidth(B_HORIZONTAL);

	titleRect = bounds;
	titleRect.bottom = titleRect.top + std::max(kMinTitleHeight,
		ceilf(be_plain_font->Size() * kTitleSpacing));
#if !LOWER_SCROLLBAR
	titleRect.right -= vScrollBarWidth;
#endif

	outlineRect = bounds;
	outlineRect.top = titleRect.bottom + 1.0;
	outlineRect.right -= vScrollBarWidth;
	if (fShowingHorizontalScrollBar)
		outlineRect.bottom -= hScrollBarHeight;

	vScrollBarRect = bounds;
#if LOWER_SCROLLBAR
	vScrollBarRect.top += std::max(kMinTitleHeight,
		ceilf(be_plain_font->Size() * kTitleSpacing));
#endif

	vScrollBarRect.left = vScrollBarRect.right - vScrollBarWidth;
	if (fShowingHorizontalScrollBar)
		vScrollBarRect.bottom -= hScrollBarHeight;

	hScrollBarRect = bounds;
	hScrollBarRect.top = hScrollBarRect.bottom - hScrollBarHeight;
	hScrollBarRect.right -= vScrollBarWidth;

	// Adjust stuff so the border will fit.
	if (fBorderStyle == B_PLAIN_BORDER || fBorderStyle == B_NO_BORDER) {
		titleRect.InsetBy(1, 0);
		titleRect.OffsetBy(0, 1);
		outlineRect.InsetBy(1, 1);
	} else if (fBorderStyle == B_FANCY_BORDER) {
		titleRect.InsetBy(2, 0);
		titleRect.OffsetBy(0, 2);
		outlineRect.InsetBy(2, 2);

		vScrollBarRect.OffsetBy(-1, 0);
#if LOWER_SCROLLBAR
		vScrollBarRect.top += 2;
		vScrollBarRect.bottom -= 1;
#else
		vScrollBarRect.InsetBy(0, 1);
#endif
		hScrollBarRect.OffsetBy(0, -1);
		hScrollBarRect.InsetBy(1, 0);
	}
}


// #pragma mark -


TitleView::TitleView(BRect rect, OutlineView* horizontalSlave,
	BList* visibleColumns, BList* sortColumns, BColumnListView* listView,
	uint32 resizingMode)
	:
	BView(rect, "title_view", resizingMode, B_WILL_DRAW | B_FRAME_EVENTS),
	fOutlineView(horizontalSlave),
	fColumns(visibleColumns),
	fSortColumns(sortColumns),
//	fColumnsWidth(0),
	fVisibleRect(rect.OffsetToCopy(0, 0)),
	fCurrentState(INACTIVE),
	fColumnPop(NULL),
	fMasterView(listView),
	fEditMode(false),
	fColumnFlags(B_ALLOW_COLUMN_MOVE | B_ALLOW_COLUMN_RESIZE
		| B_ALLOW_COLUMN_POPUP | B_ALLOW_COLUMN_REMOVE)
{
	SetViewColor(B_TRANSPARENT_COLOR);

	fUpSortArrow = new BBitmap(BRect(0, 0, 7, 7), B_CMAP8);
	fDownSortArrow = new BBitmap(BRect(0, 0, 7, 7), B_CMAP8);

	fUpSortArrow->SetBits((const void*) kUpSortArrow8x8, 64, 0, B_CMAP8);
	fDownSortArrow->SetBits((const void*) kDownSortArrow8x8, 64, 0, B_CMAP8);

	fResizeCursor = new BCursor(B_CURSOR_ID_RESIZE_EAST_WEST);
	fMinResizeCursor = new BCursor(B_CURSOR_ID_RESIZE_EAST);
	fMaxResizeCursor = new BCursor(B_CURSOR_ID_RESIZE_WEST);
	fColumnMoveCursor = new BCursor(B_CURSOR_ID_MOVE);

	FixScrollBar(true);
}


TitleView::~TitleView()
{
	delete fColumnPop;
	fColumnPop = NULL;

	delete fUpSortArrow;
	delete fDownSortArrow;

	delete fResizeCursor;
	delete fMaxResizeCursor;
	delete fMinResizeCursor;
	delete fColumnMoveCursor;
}


void
TitleView::ColumnAdded(BColumn* column)
{
#ifdef DOUBLE_BUFFERED_COLUMN_RESIZE
	fOutlineView->ResizeBufferView()->UpdateMaxWidth(column->MaxWidth());
#endif
//	fColumnsWidth += column->Width();
	FixScrollBar(false);
	Invalidate();
}


void
TitleView::ColumnResized(BColumn* column, float oldWidth)
{
//	fColumnsWidth += column->Width() - oldWidth;
	FixScrollBar(false);
	Invalidate();
}


void
TitleView::SetColumnVisible(BColumn* column, bool visible)
{
	if (column->fVisible == visible)
		return;

	// If setting it visible, do this first so we can find its position
	// to invalidate.  If hiding it, do it last.
	if (visible)
		column->fVisible = visible;

	BRect titleInvalid;
	GetTitleRect(column, &titleInvalid);

	// Now really set the visibility
	column->fVisible = visible;

//	if (visible)
//		fColumnsWidth += column->Width();
//	else
//		fColumnsWidth -= column->Width();

	BRect outlineInvalid(fOutlineView->VisibleRect());
	outlineInvalid.left = titleInvalid.left;
	titleInvalid.right = outlineInvalid.right;

	Invalidate(titleInvalid);
	fOutlineView->Invalidate(outlineInvalid);

	FixScrollBar(false);
}


void
TitleView::GetTitleRect(BColumn* findColumn, BRect* _rect)
{
	float leftEdge = MAX(kLeftMargin, fMasterView->LatchWidth());
	int32 numColumns = fColumns->CountItems();
	for (int index = 0; index < numColumns; index++) {
		BColumn* column = (BColumn*) fColumns->ItemAt(index);
		if (!column->IsVisible())
			continue;

		if (column == findColumn) {
			_rect->Set(leftEdge, 0, leftEdge + column->Width(),
				fVisibleRect.bottom);
			return;
		}

		leftEdge += column->Width() + 1;
	}

	TRESPASS();
}


int32
TitleView::FindColumn(BPoint position, float* _leftEdge)
{
	float leftEdge = MAX(kLeftMargin, fMasterView->LatchWidth());
	int32 numColumns = fColumns->CountItems();
	for (int index = 0; index < numColumns; index++) {
		BColumn* column = (BColumn*) fColumns->ItemAt(index);
		if (!column->IsVisible())
			continue;

		if (leftEdge > position.x)
			break;

		if (position.x >= leftEdge
			&& position.x <= leftEdge + column->Width()) {
			*_leftEdge = leftEdge;
			return index;
		}

		leftEdge += column->Width() + 1;
	}

	return 0;
}


void
TitleView::FixScrollBar(bool scrollToFit)
{
	BScrollBar* hScrollBar = ScrollBar(B_HORIZONTAL);
	if (hScrollBar == NULL)
		return;

	float virtualWidth = _VirtualWidth();

	if (virtualWidth > fVisibleRect.Width()) {
		hScrollBar->SetProportion(fVisibleRect.Width() / virtualWidth);

		// Perform the little trick if the user is scrolled over too far.
		// See OutlineView::FixScrollBar for a more in depth explanation
		float maxScrollBarValue = virtualWidth - fVisibleRect.Width();
		if (scrollToFit || hScrollBar->Value() <= maxScrollBarValue) {
			hScrollBar->SetRange(0.0, maxScrollBarValue);
			hScrollBar->SetSteps(50, fVisibleRect.Width());
		}
	} else if (hScrollBar->Value() == 0.0) {
		// disable scroll bar.
		hScrollBar->SetRange(0.0, 0.0);
	}
}


void
TitleView::DragSelectedColumn(BPoint position)
{
	float invalidLeft = fSelectedColumnRect.left;
	float invalidRight = fSelectedColumnRect.right;

	float leftEdge;
	int32 columnIndex = FindColumn(position, &leftEdge);
	fSelectedColumnRect.OffsetTo(leftEdge, 0);

	MoveColumn(fSelectedColumn, columnIndex);

	fSelectedColumn->fVisible = true;
	ComputeDragBoundries(fSelectedColumn, position);

	// Redraw the new column position
	GetTitleRect(fSelectedColumn, &fSelectedColumnRect);
	invalidLeft = MIN(fSelectedColumnRect.left, invalidLeft);
	invalidRight = MAX(fSelectedColumnRect.right, invalidRight);

	Invalidate(BRect(invalidLeft, 0, invalidRight, fVisibleRect.bottom));
	fOutlineView->Invalidate(BRect(invalidLeft, 0, invalidRight,
		fOutlineView->VisibleRect().bottom));

	DrawTitle(this, fSelectedColumnRect, fSelectedColumn, true);
}


void
TitleView::MoveColumn(BColumn* column, int32 index)
{
	fColumns->RemoveItem((void*) column);

	if (-1 == index) {
		// Re-add the column at the end of the list.
		fColumns->AddItem((void*) column);
	} else {
		fColumns->AddItem((void*) column, index);
	}
}


void
TitleView::SetColumnFlags(column_flags flags)
{
	fColumnFlags = flags;
}


float
TitleView::MarginWidth() const
{
	return MAX(kLeftMargin, fMasterView->LatchWidth()) + kRightMargin;
}


void
TitleView::ResizeSelectedColumn(BPoint position, bool preferred)
{
	float minWidth = fSelectedColumn->MinWidth();
	float maxWidth = fSelectedColumn->MaxWidth();

	float oldWidth = fSelectedColumn->Width();
	float originalEdge = fSelectedColumnRect.left + oldWidth;
	if (preferred) {
		float width = fOutlineView->GetColumnPreferredWidth(fSelectedColumn);
		fSelectedColumn->SetWidth(width);
	} else if (position.x > fSelectedColumnRect.left + maxWidth)
		fSelectedColumn->SetWidth(maxWidth);
	else if (position.x < fSelectedColumnRect.left + minWidth)
		fSelectedColumn->SetWidth(minWidth);
	else
		fSelectedColumn->SetWidth(position.x - fSelectedColumnRect.left - 1);

	float dX = fSelectedColumnRect.left + fSelectedColumn->Width()
		 - originalEdge;
	if (dX != 0) {
		float columnHeight = fVisibleRect.Height();
		BRect originalRect(originalEdge, 0, 1000000.0, columnHeight);
		BRect movedRect(originalRect);
		movedRect.OffsetBy(dX, 0);

		// Update the size of the title column
		BRect sourceRect(0, 0, fSelectedColumn->Width(), columnHeight);
		BRect destRect(sourceRect);
		destRect.OffsetBy(fSelectedColumnRect.left, 0);

#if DOUBLE_BUFFERED_COLUMN_RESIZE
		ColumnResizeBufferView* bufferView = fOutlineView->ResizeBufferView();
		bufferView->Lock();
		DrawTitle(bufferView, sourceRect, fSelectedColumn, false);
		bufferView->Sync();
		bufferView->Unlock();

		CopyBits(originalRect, movedRect);
		DrawBitmap(bufferView->Bitmap(), sourceRect, destRect);
#else
		CopyBits(originalRect, movedRect);
		DrawTitle(this, destRect, fSelectedColumn, false);
#endif

		// Update the body view
		BRect slaveSize = fOutlineView->VisibleRect();
		BRect slaveSource(originalRect);
		slaveSource.bottom = slaveSize.bottom;
		BRect slaveDest(movedRect);
		slaveDest.bottom = slaveSize.bottom;
		fOutlineView->CopyBits(slaveSource, slaveDest);
		fOutlineView->RedrawColumn(fSelectedColumn, fSelectedColumnRect.left,
			fResizingFirstColumn);

//		fColumnsWidth += dX;

		// Update the cursor
		if (fSelectedColumn->Width() == minWidth)
			SetViewCursor(fMinResizeCursor, true);
		else if (fSelectedColumn->Width() == maxWidth)
			SetViewCursor(fMaxResizeCursor, true);
		else
			SetViewCursor(fResizeCursor, true);

		ColumnResized(fSelectedColumn, oldWidth);
	}
}


void
TitleView::ComputeDragBoundries(BColumn* findColumn, BPoint)
{
	float previousColumnLeftEdge = -1000000.0;
	float nextColumnRightEdge = 1000000.0;

	bool foundColumn = false;
	float leftEdge = MAX(kLeftMargin, fMasterView->LatchWidth());
	int32 numColumns = fColumns->CountItems();
	for (int index = 0; index < numColumns; index++) {
		BColumn* column = (BColumn*) fColumns->ItemAt(index);
		if (!column->IsVisible())
			continue;

		if (column == findColumn) {
			foundColumn = true;
			continue;
		}

		if (foundColumn) {
			nextColumnRightEdge = leftEdge + column->Width();
			break;
		} else
			previousColumnLeftEdge = leftEdge;

		leftEdge += column->Width() + 1;
	}

	float rightEdge = leftEdge + findColumn->Width();

	fLeftDragBoundry = MIN(previousColumnLeftEdge + findColumn->Width(),
		leftEdge);
	fRightDragBoundry = MAX(nextColumnRightEdge, rightEdge);
}


void
TitleView::DrawTitle(BView* view, BRect rect, BColumn* column, bool depressed)
{
	BRect drawRect;
	drawRect = rect;

	font_height fh;
	GetFontHeight(&fh);

	float baseline = floor(drawRect.top + fh.ascent
		+ (drawRect.Height() + 1 - (fh.ascent + fh.descent)) / 2);

	BRect bgRect = rect;

	rgb_color base = ui_color(B_PANEL_BACKGROUND_COLOR);
	view->SetHighColor(tint_color(base, B_DARKEN_2_TINT));
	view->StrokeLine(bgRect.LeftBottom(), bgRect.RightBottom());

	bgRect.bottom--;
	bgRect.right--;

	if (depressed)
		base = tint_color(base, B_DARKEN_1_TINT);

	be_control_look->DrawButtonBackground(view, bgRect, rect, base, 0,
		BControlLook::B_TOP_BORDER | BControlLook::B_BOTTOM_BORDER);

	view->SetHighColor(tint_color(ui_color(B_PANEL_BACKGROUND_COLOR),
		B_DARKEN_2_TINT));
	view->StrokeLine(rect.RightTop(), rect.RightBottom());

	// If no column given, nothing else to draw.
	if (column == NULL)
		return;

	view->SetHighColor(fMasterView->Color(B_COLOR_HEADER_TEXT));

	BFont font;
	GetFont(&font);
	view->SetFont(&font);

	int sortIndex = fSortColumns->IndexOf(column);
	if (sortIndex >= 0) {
		// Draw sort notation.
		BPoint upperLeft(drawRect.right - kSortIndicatorWidth, baseline);

		if (fSortColumns->CountItems() > 1) {
			char str[256];
			sprintf(str, "%d", sortIndex + 1);
			const float w = view->StringWidth(str);
			upperLeft.x -= w;

			view->SetDrawingMode(B_OP_COPY);
			view->MovePenTo(BPoint(upperLeft.x + kSortIndicatorWidth,
				baseline));
			view->DrawString(str);
		}

		float bmh = fDownSortArrow->Bounds().Height()+1;

		view->SetDrawingMode(B_OP_OVER);

		if (column->fSortAscending) {
			BPoint leftTop(upperLeft.x, drawRect.top + (drawRect.IntegerHeight()
				- fDownSortArrow->Bounds().IntegerHeight()) / 2);
			view->DrawBitmapAsync(fDownSortArrow, leftTop);
		} else {
			BPoint leftTop(upperLeft.x, drawRect.top + (drawRect.IntegerHeight()
				- fUpSortArrow->Bounds().IntegerHeight()) / 2);
			view->DrawBitmapAsync(fUpSortArrow, leftTop);
		}

		upperLeft.y = baseline - bmh + floor((fh.ascent + fh.descent - bmh) / 2);
		if (upperLeft.y < drawRect.top)
			upperLeft.y = drawRect.top;

		// Adjust title stuff for sort indicator
		drawRect.right = upperLeft.x - 2;
	}

	if (drawRect.right > drawRect.left) {
#if CONSTRAIN_CLIPPING_REGION
		BRegion clipRegion(drawRect);
		view->PushState();
		view->ConstrainClippingRegion(&clipRegion);
#endif
		view->MovePenTo(BPoint(drawRect.left + 8, baseline));
		view->SetDrawingMode(B_OP_OVER);
		view->SetHighColor(fMasterView->Color(B_COLOR_HEADER_TEXT));
		column->DrawTitle(drawRect, view);

#if CONSTRAIN_CLIPPING_REGION
		view->PopState();
#endif
	}
}


float
TitleView::_VirtualWidth() const
{
	float width = MarginWidth();

	int32 count = fColumns->CountItems();
	for (int32 i = 0; i < count; i++) {
		BColumn* column = reinterpret_cast<BColumn*>(fColumns->ItemAt(i));
		if (column->IsVisible())
			width += column->Width();
	}

	return width;
}


void
TitleView::Draw(BRect invalidRect)
{
	float columnLeftEdge = MAX(kLeftMargin, fMasterView->LatchWidth());
	for (int32 columnIndex = 0; columnIndex < fColumns->CountItems();
		columnIndex++) {

		BColumn* column = (BColumn*) fColumns->ItemAt(columnIndex);
		if (!column->IsVisible())
			continue;

		if (columnLeftEdge > invalidRect.right)
			break;

		if (columnLeftEdge + column->Width() >= invalidRect.left) {
			BRect titleRect(columnLeftEdge, 0,
				columnLeftEdge + column->Width(), fVisibleRect.Height());
			DrawTitle(this, titleRect, column,
				(fCurrentState == DRAG_COLUMN_INSIDE_TITLE
				&& fSelectedColumn == column));
		}

		columnLeftEdge += column->Width() + 1;
	}


	// bevels for right title margin
	if (columnLeftEdge <= invalidRect.right) {
		BRect titleRect(columnLeftEdge, 0, Bounds().right + 2,
			fVisibleRect.Height());
		DrawTitle(this, titleRect, NULL, false);
	}

	// bevels for left title margin
	if (invalidRect.left < MAX(kLeftMargin, fMasterView->LatchWidth())) {
		BRect titleRect(0, 0, MAX(kLeftMargin, fMasterView->LatchWidth()) - 1,
			fVisibleRect.Height());
		DrawTitle(this, titleRect, NULL, false);
	}

#if DRAG_TITLE_OUTLINE
	// (internal) column drag indicator
	if (fCurrentState == DRAG_COLUMN_INSIDE_TITLE) {
		BRect dragRect(fSelectedColumnRect);
		dragRect.OffsetTo(fCurrentDragPosition.x - fClickPoint.x, 0);
		if (dragRect.Intersects(invalidRect)) {
			SetHighColor(0, 0, 255);
			StrokeRect(dragRect);
		}
	}
#endif
}


void
TitleView::ScrollTo(BPoint position)
{
	fOutlineView->ScrollBy(position.x - fVisibleRect.left, 0);
	fVisibleRect.OffsetTo(position.x, position.y);

	// Perform the little trick if the user is scrolled over too far.
	// See OutlineView::ScrollTo for a more in depth explanation
	float maxScrollBarValue = _VirtualWidth() - fVisibleRect.Width();
	BScrollBar* hScrollBar = ScrollBar(B_HORIZONTAL);
	float min, max;
	hScrollBar->GetRange(&min, &max);
	if (max != maxScrollBarValue && position.x > maxScrollBarValue)
		FixScrollBar(true);

	_inherited::ScrollTo(position);
}


void
TitleView::MessageReceived(BMessage* message)
{
	if (message->what == kToggleColumn) {
		int32 num;
		if (message->FindInt32("be:field_num", &num) == B_OK) {
			for (int index = 0; index < fColumns->CountItems(); index++) {
				BColumn* column = (BColumn*) fColumns->ItemAt(index);
				if (column == NULL)
					continue;

				if (column->LogicalFieldNum() == num)
					column->SetVisible(!column->IsVisible());
			}
		}
		return;
	}

	BView::MessageReceived(message);
}


void
TitleView::MouseDown(BPoint position)
{
	if (fEditMode)
		return;

	int32 buttons = 1;
	Window()->CurrentMessage()->FindInt32("buttons", &buttons);
	if (buttons == B_SECONDARY_MOUSE_BUTTON
		&& (fColumnFlags & B_ALLOW_COLUMN_POPUP)) {
		// Right mouse button -- bring up menu to show/hide columns.
		if (fColumnPop == NULL)
			fColumnPop = new BPopUpMenu("Columns", false, false);

		fColumnPop->RemoveItems(0, fColumnPop->CountItems(), true);
		BMessenger me(this);
		for (int index = 0; index < fColumns->CountItems(); index++) {
			BColumn* column = (BColumn*) fColumns->ItemAt(index);
			if (column == NULL)
				continue;

			BString name;
			column->GetColumnName(&name);
			BMessage* message = new BMessage(kToggleColumn);
			message->AddInt32("be:field_num", column->LogicalFieldNum());
			BMenuItem* item = new BMenuItem(name.String(), message);
			item->SetMarked(column->IsVisible());
			item->SetTarget(me);
			fColumnPop->AddItem(item);
		}

		BPoint screenPosition = ConvertToScreen(position);
		BRect sticky(screenPosition, screenPosition);
		sticky.InsetBy(-5, -5);
		fColumnPop->Go(ConvertToScreen(position), true, false, sticky, true);

		return;
	}

	fResizingFirstColumn = true;
	float leftEdge = MAX(kLeftMargin, fMasterView->LatchWidth());
	for (int index = 0; index < fColumns->CountItems(); index++) {
		BColumn* column = (BColumn*)fColumns->ItemAt(index);
		if (column == NULL || !column->IsVisible())
			continue;

		if (leftEdge > position.x + kColumnResizeAreaWidth / 2)
			break;

		// check for resizing a column
		float rightEdge = leftEdge + column->Width();

		if (column->ShowHeading()) {
			if (position.x > rightEdge - kColumnResizeAreaWidth / 2
				&& position.x < rightEdge + kColumnResizeAreaWidth / 2
				&& column->MaxWidth() > column->MinWidth()
				&& (fColumnFlags & B_ALLOW_COLUMN_RESIZE) != 0) {

				int32 clicks = 0;
				fSelectedColumn = column;
				fSelectedColumnRect.Set(leftEdge, 0, rightEdge,
					fVisibleRect.Height());
				Window()->CurrentMessage()->FindInt32("clicks", &clicks);
				if (clicks == 2 || buttons == B_TERTIARY_MOUSE_BUTTON) {
					ResizeSelectedColumn(position, true);
					fCurrentState = INACTIVE;
					break;
				}
				fCurrentState = RESIZING_COLUMN;
				fClickPoint = BPoint(position.x - rightEdge - 1,
					position.y - fSelectedColumnRect.top);
				SetMouseEventMask(B_POINTER_EVENTS,
					B_LOCK_WINDOW_FOCUS | B_NO_POINTER_HISTORY);
				break;
			}

			fResizingFirstColumn = false;

			// check for clicking on a column
			if (position.x > leftEdge && position.x < rightEdge) {
				fCurrentState = PRESSING_COLUMN;
				fSelectedColumn = column;
				fSelectedColumnRect.Set(leftEdge, 0, rightEdge,
					fVisibleRect.Height());
				DrawTitle(this, fSelectedColumnRect, fSelectedColumn, true);
				fClickPoint = BPoint(position.x - fSelectedColumnRect.left,
					position.y - fSelectedColumnRect.top);
				SetMouseEventMask(B_POINTER_EVENTS,
					B_LOCK_WINDOW_FOCUS | B_NO_POINTER_HISTORY);
				break;
			}
		}
		leftEdge = rightEdge + 1;
	}
}


void
TitleView::MouseMoved(BPoint position, uint32 transit,
	const BMessage* dragMessage)
{
	if (fEditMode)
		return;

	// Handle column manipulation
	switch (fCurrentState) {
		case RESIZING_COLUMN:
			ResizeSelectedColumn(position - BPoint(fClickPoint.x, 0));
			break;

		case PRESSING_COLUMN: {
			if (abs((int32)(position.x - (fClickPoint.x
					+ fSelectedColumnRect.left))) > kColumnResizeAreaWidth
				|| abs((int32)(position.y - (fClickPoint.y
					+ fSelectedColumnRect.top))) > kColumnResizeAreaWidth) {
				// User has moved the mouse more than the tolerable amount,
				// initiate a drag.
				if (transit == B_INSIDE_VIEW || transit == B_ENTERED_VIEW) {
					if(fColumnFlags & B_ALLOW_COLUMN_MOVE) {
						fCurrentState = DRAG_COLUMN_INSIDE_TITLE;
						ComputeDragBoundries(fSelectedColumn, position);
						SetViewCursor(fColumnMoveCursor, true);
#if DRAG_TITLE_OUTLINE
						BRect invalidRect(fSelectedColumnRect);
						invalidRect.OffsetTo(position.x - fClickPoint.x, 0);
						fCurrentDragPosition = position;
						Invalidate(invalidRect);
#endif
					}
				} else {
					if(fColumnFlags & B_ALLOW_COLUMN_REMOVE) {
						// Dragged outside view
						fCurrentState = DRAG_COLUMN_OUTSIDE_TITLE;
						fSelectedColumn->SetVisible(false);
						BRect dragRect(fSelectedColumnRect);

						// There is a race condition where the mouse may have
						// moved by the time we get to handle this message.
						// If the user drags a column very quickly, this
						// results in the annoying bug where the cursor is
						// outside of the rectangle that is being dragged
						// around.  Call GetMouse with the checkQueue flag set
						// to false so we can get the most recent position of
						// the mouse.  This minimizes this problem (although
						// it is currently not possible to completely eliminate
						// it).
						uint32 buttons;
						GetMouse(&position, &buttons, false);
						dragRect.OffsetTo(position.x - fClickPoint.x,
							position.y - dragRect.Height() / 2);
						BeginRectTracking(dragRect, B_TRACK_WHOLE_RECT);
					}
				}
			}

			break;
		}

		case DRAG_COLUMN_INSIDE_TITLE: {
			if (transit == B_EXITED_VIEW
				&& (fColumnFlags & B_ALLOW_COLUMN_REMOVE)) {
				// Dragged outside view
				fCurrentState = DRAG_COLUMN_OUTSIDE_TITLE;
				fSelectedColumn->SetVisible(false);
				BRect dragRect(fSelectedColumnRect);

				// See explanation above.
				uint32 buttons;
				GetMouse(&position, &buttons, false);

				dragRect.OffsetTo(position.x - fClickPoint.x,
					position.y - fClickPoint.y);
				BeginRectTracking(dragRect, B_TRACK_WHOLE_RECT);
			} else if (position.x < fLeftDragBoundry
				|| position.x > fRightDragBoundry) {
				DragSelectedColumn(position - BPoint(fClickPoint.x, 0));
			}

#if DRAG_TITLE_OUTLINE
			// Set up the invalid rect to include the rect for the previous
			// position of the drag rect, as well as the new one.
			BRect invalidRect(fSelectedColumnRect);
			invalidRect.OffsetTo(fCurrentDragPosition.x - fClickPoint.x, 0);
			if (position.x < fCurrentDragPosition.x)
				invalidRect.left -= fCurrentDragPosition.x - position.x;
			else
				invalidRect.right += position.x - fCurrentDragPosition.x;

			fCurrentDragPosition = position;
			Invalidate(invalidRect);
#endif
			break;
		}

		case DRAG_COLUMN_OUTSIDE_TITLE:
			if (transit == B_ENTERED_VIEW) {
				// Drag back into view
				EndRectTracking();
				fCurrentState = DRAG_COLUMN_INSIDE_TITLE;
				fSelectedColumn->SetVisible(true);
				DragSelectedColumn(position - BPoint(fClickPoint.x, 0));
			}

			break;

		case INACTIVE:
			// Check for cursor changes if we are over the resize area for
			// a column.
			BColumn* resizeColumn = 0;
			float leftEdge = MAX(kLeftMargin, fMasterView->LatchWidth());
			for (int index = 0; index < fColumns->CountItems(); index++) {
				BColumn* column = (BColumn*) fColumns->ItemAt(index);
				if (!column->IsVisible())
					continue;

				if (leftEdge > position.x + kColumnResizeAreaWidth / 2)
					break;

				float rightEdge = leftEdge + column->Width();
				if (position.x > rightEdge - kColumnResizeAreaWidth / 2
					&& position.x < rightEdge + kColumnResizeAreaWidth / 2
					&& column->MaxWidth() > column->MinWidth()) {
					resizeColumn = column;
					break;
				}

				leftEdge = rightEdge + 1;
			}

			// Update the cursor
			if (resizeColumn) {
				if (resizeColumn->Width() == resizeColumn->MinWidth())
					SetViewCursor(fMinResizeCursor, true);
				else if (resizeColumn->Width() == resizeColumn->MaxWidth())
					SetViewCursor(fMaxResizeCursor, true);
				else
					SetViewCursor(fResizeCursor, true);
			} else
				SetViewCursor(B_CURSOR_SYSTEM_DEFAULT, true);
			break;
	}
}


void
TitleView::MouseUp(BPoint position)
{
	if (fEditMode)
		return;

	switch (fCurrentState) {
		case RESIZING_COLUMN:
			ResizeSelectedColumn(position - BPoint(fClickPoint.x, 0));
			fCurrentState = INACTIVE;
			FixScrollBar(false);
			break;

		case PRESSING_COLUMN: {
			if (fMasterView->SortingEnabled()) {
				if (fSortColumns->HasItem(fSelectedColumn)) {
					if ((modifiers() & B_CONTROL_KEY) == 0
						&& fSortColumns->CountItems() > 1) {
						fSortColumns->MakeEmpty();
						fSortColumns->AddItem(fSelectedColumn);
					}

					fSelectedColumn->fSortAscending
						= !fSelectedColumn->fSortAscending;
				} else {
					if ((modifiers() & B_CONTROL_KEY) == 0)
						fSortColumns->MakeEmpty();

					fSortColumns->AddItem(fSelectedColumn);
					fSelectedColumn->fSortAscending = true;
				}

				fOutlineView->StartSorting();
			}

			fCurrentState = INACTIVE;
			Invalidate();
			break;
		}

		case DRAG_COLUMN_INSIDE_TITLE:
			fCurrentState = INACTIVE;

#if DRAG_TITLE_OUTLINE
			Invalidate();	// xxx Can make this smaller
#else
			Invalidate(fSelectedColumnRect);
#endif
			SetViewCursor(B_CURSOR_SYSTEM_DEFAULT, true);
			break;

		case DRAG_COLUMN_OUTSIDE_TITLE:
			fCurrentState = INACTIVE;
			EndRectTracking();
			SetViewCursor(B_CURSOR_SYSTEM_DEFAULT, true);
			break;

		default:
			;
	}
}


void
TitleView::FrameResized(float width, float height)
{
	fVisibleRect.right = fVisibleRect.left + width;
	fVisibleRect.bottom = fVisibleRect.top + height;
	FixScrollBar(true);
}


// #pragma mark - OutlineView


OutlineView::OutlineView(BRect rect, BList* visibleColumns, BList* sortColumns,
	BColumnListView* listView)
	:
	BView(rect, "outline_view", B_FOLLOW_ALL_SIDES,
		B_WILL_DRAW | B_FRAME_EVENTS),
	fColumns(visibleColumns),
	fSortColumns(sortColumns),
	fItemsHeight(0.0),
	fVisibleRect(rect.OffsetToCopy(0, 0)),
	fFocusRow(0),
	fRollOverRow(0),
	fLastSelectedItem(0),
	fFirstSelectedItem(0),
	fSortThread(B_BAD_THREAD_ID),
	fCurrentState(INACTIVE),
	fMasterView(listView),
	fSelectionMode(B_MULTIPLE_SELECTION_LIST),
	fTrackMouse(false),
	fCurrentField(0),
	fCurrentRow(0),
	fCurrentColumn(0),
	fMouseDown(false),
	fCurrentCode(B_OUTSIDE_VIEW),
	fEditMode(false),
	fDragging(false),
	fClickCount(0),
	fDropHighlightY(-1)
{
	SetViewColor(B_TRANSPARENT_COLOR);

#if DOUBLE_BUFFERED_COLUMN_RESIZE
	fResizeBufferView = new ColumnResizeBufferView();
#endif

	FixScrollBar(true);
	fSelectionListDummyHead.fNextSelected = &fSelectionListDummyHead;
	fSelectionListDummyHead.fPrevSelected = &fSelectionListDummyHead;
}


OutlineView::~OutlineView()
{
#if DOUBLE_BUFFERED_COLUMN_RESIZE
	delete fResizeBufferView;
#endif

	Clear();
}


void
OutlineView::Clear()
{
	DeselectAll();
		// Make sure selection list doesn't point to deleted rows!
	RecursiveDeleteRows(&fRows, false);
	fItemsHeight = 0.0;
	FixScrollBar(true);
	Invalidate();
}


void
OutlineView::SetSelectionMode(list_view_type mode)
{
	DeselectAll();
	fSelectionMode = mode;
}


list_view_type
OutlineView::SelectionMode() const
{
	return fSelectionMode;
}


void
OutlineView::Deselect(BRow* row)
{
	if (row == NULL)
		return;

	if (row->fNextSelected != 0) {
		row->fNextSelected->fPrevSelected = row->fPrevSelected;
		row->fPrevSelected->fNextSelected = row->fNextSelected;
		row->fNextSelected = 0;
		row->fPrevSelected = 0;
		Invalidate();
	}
}


void
OutlineView::AddToSelection(BRow* row)
{
	if (row == NULL)
		return;

	if (row->fNextSelected == 0) {
		if (fSelectionMode == B_SINGLE_SELECTION_LIST)
			DeselectAll();

		row->fNextSelected = fSelectionListDummyHead.fNextSelected;
		row->fPrevSelected = &fSelectionListDummyHead;
		row->fNextSelected->fPrevSelected = row;
		row->fPrevSelected->fNextSelected = row;

		BRect invalidRect;
		if (FindVisibleRect(row, &invalidRect))
			Invalidate(invalidRect);
	}
}


void
OutlineView::RecursiveDeleteRows(BRowContainer* list, bool isOwner)
{
	if (list == NULL)
		return;

	while (true) {
		BRow* row = list->RemoveItemAt(0L);
		if (row == 0)
			break;

		if (row->fChildList)
			RecursiveDeleteRows(row->fChildList, true);

		delete row;
	}

	if (isOwner)
		delete list;
}


void
OutlineView::RedrawColumn(BColumn* column, float leftEdge, bool isFirstColumn)
{
	// TODO: Remove code duplication (private function which takes a view
	// pointer, pass "this" in non-double buffered mode)!
	// Watch out for sourceRect versus destRect though!
	if (!column)
		return;

	font_height fh;
	GetFontHeight(&fh);
	float line = 0.0;
	bool tintedLine = true;
	for (RecursiveOutlineIterator iterator(&fRows); iterator.CurrentRow();
		line += iterator.CurrentRow()->Height() + 1, iterator.GoToNext()) {

		BRow* row = iterator.CurrentRow();
		float rowHeight = row->Height();
		if (line > fVisibleRect.bottom)
			break;
		tintedLine = !tintedLine;

		if (line + rowHeight >= fVisibleRect.top) {
#if DOUBLE_BUFFERED_COLUMN_RESIZE
			BRect sourceRect(0, 0, column->Width(), rowHeight);
#endif
			BRect destRect(leftEdge, line, leftEdge + column->Width(),
				line + rowHeight);

			rgb_color highColor;
			rgb_color lowColor;
			if (row->fNextSelected != 0) {
				if (fEditMode) {
					highColor = fMasterView->Color(B_COLOR_EDIT_BACKGROUND);
					lowColor = fMasterView->Color(B_COLOR_EDIT_BACKGROUND);
				} else {
					highColor = fMasterView->Color(B_COLOR_SELECTION);
					lowColor = fMasterView->Color(B_COLOR_SELECTION);
				}
			} else {
				highColor = fMasterView->Color(B_COLOR_BACKGROUND);
				lowColor = fMasterView->Color(B_COLOR_BACKGROUND);
			}
			if (tintedLine) {
				if (lowColor.IsLight())
					lowColor = tint_color(lowColor, kTintedLineTint);
				else
					lowColor = tint_color(lowColor, kTintedLineTintDark);
			}


#if DOUBLE_BUFFERED_COLUMN_RESIZE
			fResizeBufferView->Lock();

			fResizeBufferView->SetHighColor(highColor);
			fResizeBufferView->SetLowColor(lowColor);

			BFont font;
			GetFont(&font);
			fResizeBufferView->SetFont(&font);
			fResizeBufferView->FillRect(sourceRect, B_SOLID_LOW);

			if (isFirstColumn) {
				// If this is the first column, double buffer drawing the latch
				// too.
				destRect.left += iterator.CurrentLevel() * kOutlineLevelIndent
					- fMasterView->LatchWidth();
				sourceRect.left += iterator.CurrentLevel() * kOutlineLevelIndent
					- fMasterView->LatchWidth();

				LatchType pos = B_NO_LATCH;
				if (row->HasLatch())
					pos = row->fIsExpanded ? B_OPEN_LATCH : B_CLOSED_LATCH;

				BRect latchRect(sourceRect);
				latchRect.right = latchRect.left + fMasterView->LatchWidth();
				fMasterView->DrawLatch(fResizeBufferView, latchRect, pos, row);
			}

			BField* field = row->GetField(column->fFieldID);
			if (field) {
				BRect fieldRect(sourceRect);
				if (isFirstColumn)
					fieldRect.left += fMasterView->LatchWidth();

	#if CONSTRAIN_CLIPPING_REGION
				BRegion clipRegion(fieldRect);
				fResizeBufferView->PushState();
				fResizeBufferView->ConstrainClippingRegion(&clipRegion);
	#endif
				fResizeBufferView->SetHighColor(fMasterView->Color(
					row->fNextSelected ? B_COLOR_SELECTION_TEXT
						: B_COLOR_TEXT));
				float baseline = floor(fieldRect.top + fh.ascent
					+ (fieldRect.Height() + 1 - (fh.ascent+fh.descent)) / 2);
				fResizeBufferView->MovePenTo(fieldRect.left + 8, baseline);
				column->DrawField(field, fieldRect, fResizeBufferView);
	#if CONSTRAIN_CLIPPING_REGION
				fResizeBufferView->PopState();
	#endif
			}

			if (fFocusRow == row && !fEditMode && fMasterView->IsFocus()
				&& Window()->IsActive()) {
				fResizeBufferView->SetHighColor(fMasterView->Color(
					B_COLOR_ROW_DIVIDER));
				fResizeBufferView->StrokeRect(BRect(-1, sourceRect.top,
					10000.0, sourceRect.bottom));
			}

			fResizeBufferView->Sync();
			fResizeBufferView->Unlock();
			SetDrawingMode(B_OP_COPY);
			DrawBitmap(fResizeBufferView->Bitmap(), sourceRect, destRect);

#else

			SetHighColor(highColor);
			SetLowColor(lowColor);
			FillRect(destRect, B_SOLID_LOW);

			BField* field = row->GetField(column->fFieldID);
			if (field) {
	#if CONSTRAIN_CLIPPING_REGION
				BRegion clipRegion(destRect);
				PushState();
				ConstrainClippingRegion(&clipRegion);
	#endif
				SetHighColor(fMasterView->Color(row->fNextSelected
					? B_COLOR_SELECTION_TEXT : B_COLOR_TEXT));
				float baseline = floor(destRect.top + fh.ascent
					+ (destRect.Height() + 1 - (fh.ascent + fh.descent)) / 2);
				MovePenTo(destRect.left + 8, baseline);
				column->DrawField(field, destRect, this);
	#if CONSTRAIN_CLIPPING_REGION
				PopState();
	#endif
			}

			if (fFocusRow == row && !fEditMode && fMasterView->IsFocus()
				&& Window()->IsActive()) {
				SetHighColor(fMasterView->Color(B_COLOR_ROW_DIVIDER));
				StrokeRect(BRect(0, destRect.top, 10000.0, destRect.bottom));
			}
#endif
		}
	}
}


void
OutlineView::Draw(BRect invalidBounds)
{
#if SMART_REDRAW
	BRegion invalidRegion;
	GetClippingRegion(&invalidRegion);
#endif

	font_height fh;
	GetFontHeight(&fh);

	float line = 0.0;
	bool tintedLine = true;
	int32 numColumns = fColumns->CountItems();
	for (RecursiveOutlineIterator iterator(&fRows); iterator.CurrentRow();
		iterator.GoToNext()) {
		BRow* row = iterator.CurrentRow();
		if (line > invalidBounds.bottom)
			break;

		tintedLine = !tintedLine;
		float rowHeight = row->Height();

		if (line >= invalidBounds.top - rowHeight) {
			bool isFirstColumn = true;
			float fieldLeftEdge = MAX(kLeftMargin, fMasterView->LatchWidth());

			// setup background color
			rgb_color lowColor;
			if (row->fNextSelected != 0) {
				if (Window()->IsActive()) {
					if (fEditMode)
						lowColor = fMasterView->Color(B_COLOR_EDIT_BACKGROUND);
					else
						lowColor = fMasterView->Color(B_COLOR_SELECTION);
				}
				else
					lowColor = fMasterView->Color(B_COLOR_NON_FOCUS_SELECTION);
			} else
				lowColor = fMasterView->Color(B_COLOR_BACKGROUND);
			if (tintedLine) {
				if (lowColor.IsLight())
					lowColor = tint_color(lowColor, kTintedLineTint);
				else
					lowColor = tint_color(lowColor, kTintedLineTintDark);
			}

			for (int columnIndex = 0; columnIndex < numColumns; columnIndex++) {
				BColumn* column = (BColumn*) fColumns->ItemAt(columnIndex);
				if (!column->IsVisible())
					continue;

				if (!isFirstColumn && fieldLeftEdge > invalidBounds.right)
					break;

				if (fieldLeftEdge + column->Width() >= invalidBounds.left) {
					BRect fullRect(fieldLeftEdge, line,
						fieldLeftEdge + column->Width(), line + rowHeight);

					bool clippedFirstColumn = false;
						// This happens when a column is indented past the
						// beginning of the next column.

					SetHighColor(lowColor);

					BRect destRect(fullRect);
					if (isFirstColumn) {
						fullRect.left -= fMasterView->LatchWidth();
						destRect.left += iterator.CurrentLevel()
							* kOutlineLevelIndent;
						if (destRect.left >= destRect.right) {
							// clipped
							FillRect(BRect(0, line, fieldLeftEdge
								+ column->Width(), line + rowHeight));
							clippedFirstColumn = true;
						}

						FillRect(BRect(0, line, MAX(kLeftMargin,
							fMasterView->LatchWidth()), line + row->Height()));
					}


#if SMART_REDRAW
					if (!clippedFirstColumn
						&& invalidRegion.Intersects(fullRect)) {
#else
					if (!clippedFirstColumn) {
#endif
						FillRect(fullRect);	// Using color set above

						// Draw the latch widget if it has one.
						if (isFirstColumn) {
							if (row == fTargetRow
								&& fCurrentState == LATCH_CLICKED) {
								// Note that this only occurs if the user is
								// holding down a latch while items are added
								// in the background.
								BPoint pos;
								uint32 buttons;
								GetMouse(&pos, &buttons);
								if (fLatchRect.Contains(pos)) {
									fMasterView->DrawLatch(this, fLatchRect,
										B_PRESSED_LATCH, fTargetRow);
								} else {
									fMasterView->DrawLatch(this, fLatchRect,
										row->fIsExpanded ? B_OPEN_LATCH
											: B_CLOSED_LATCH, fTargetRow);
								}
							} else {
								LatchType pos = B_NO_LATCH;
								if (row->HasLatch())
									pos = row->fIsExpanded ? B_OPEN_LATCH
										: B_CLOSED_LATCH;

								fMasterView->DrawLatch(this,
									BRect(destRect.left
										- fMasterView->LatchWidth(),
									destRect.top, destRect.left,
									destRect.bottom), pos, row);
							}
						}

						SetHighColor(fMasterView->HighColor());
							// The master view just holds the high color for us.
						SetLowColor(lowColor);

						BField* field = row->GetField(column->fFieldID);
						if (field) {
#if CONSTRAIN_CLIPPING_REGION
							BRegion clipRegion(destRect);
							PushState();
							ConstrainClippingRegion(&clipRegion);
#endif
							SetHighColor(fMasterView->Color(
								row->fNextSelected ? B_COLOR_SELECTION_TEXT
								: B_COLOR_TEXT));
							float baseline = floor(destRect.top + fh.ascent
								+ (destRect.Height() + 1
								- (fh.ascent+fh.descent)) / 2);
							MovePenTo(destRect.left + 8, baseline);
							column->DrawField(field, destRect, this);
#if CONSTRAIN_CLIPPING_REGION
							PopState();
#endif
						}
					}
				}

				isFirstColumn = false;
				fieldLeftEdge += column->Width() + 1;
			}

			if (fieldLeftEdge <= invalidBounds.right) {
				SetHighColor(lowColor);
				FillRect(BRect(fieldLeftEdge, line, invalidBounds.right,
					line + rowHeight));
			}
		}

		// indicate the keyboard focus row
		if (fFocusRow == row && !fEditMode && fMasterView->IsFocus()
			&& Window()->IsActive()) {
			SetHighColor(fMasterView->Color(B_COLOR_ROW_DIVIDER));
			StrokeRect(BRect(0, line, 10000.0, line + rowHeight));
		}

		line += rowHeight + 1;
	}

	if (line <= invalidBounds.bottom) {
		// fill background below last item
		SetHighColor(fMasterView->Color(B_COLOR_BACKGROUND));
		FillRect(BRect(invalidBounds.left, line, invalidBounds.right,
			invalidBounds.bottom));
	}

	// Draw the drop target line
	if (fDropHighlightY != -1) {
		InvertRect(BRect(0, fDropHighlightY - kDropHighlightLineHeight / 2,
			1000000, fDropHighlightY + kDropHighlightLineHeight / 2));
	}
}


BRow*
OutlineView::FindRow(float ypos, int32* _rowIndent, float* _top)
{
	if (_rowIndent && _top) {
		float line = 0.0;
		for (RecursiveOutlineIterator iterator(&fRows); iterator.CurrentRow();
			iterator.GoToNext()) {

			BRow* row = iterator.CurrentRow();
			if (line > ypos)
				break;

			float rowHeight = row->Height();
			if (ypos <= line + rowHeight) {
				*_top = line;
				*_rowIndent = iterator.CurrentLevel();
				return row;
			}

			line += rowHeight + 1;
		}
	}

	return NULL;
}

void OutlineView::SetMouseTrackingEnabled(bool enabled)
{
	fTrackMouse = enabled;
	if (!enabled && fDropHighlightY != -1) {
		// Erase the old target line
		InvertRect(BRect(0, fDropHighlightY - kDropHighlightLineHeight / 2,
			1000000, fDropHighlightY + kDropHighlightLineHeight / 2));
		fDropHighlightY = -1;
	}
}


//
// Note that this interaction is not totally safe.  If items are added to
// the list in the background, the widget rect will be incorrect, possibly
// resulting in drawing glitches.  The code that adds items needs to be a little smarter
// about invalidating state.
//
void
OutlineView::MouseDown(BPoint position)
{
	if (!fEditMode)
		fMasterView->MakeFocus(true);

	// Check to see if the user is clicking on a widget to open a section
	// of the list.
	bool reset_click_count = false;
	int32 indent;
	float rowTop;
	BRow* row = FindRow(position.y, &indent, &rowTop);
	if (row != NULL) {

		// Update fCurrentField
		bool handle_field = false;
		BField* new_field = 0;
		BRow* new_row = 0;
		BColumn* new_column = 0;
		BRect new_rect;

		if (position.y >= 0) {
			if (position.x >= 0) {
				float x = 0;
				for (int32 c = 0; c < fMasterView->CountColumns(); c++) {
					new_column = fMasterView->ColumnAt(c);
					if (!new_column->IsVisible())
						continue;
					if ((MAX(kLeftMargin, fMasterView->LatchWidth()) + x)
						+ new_column->Width() >= position.x) {
						if (new_column->WantsEvents()) {
							new_field = row->GetField(c);
							new_row = row;
							FindRect(new_row,&new_rect);
							new_rect.left = MAX(kLeftMargin,
								fMasterView->LatchWidth()) + x;
							new_rect.right = new_rect.left
								+ new_column->Width() - 1;
							handle_field = true;
						}
						break;
					}
					x += new_column->Width();
				}
			}
		}

		// Handle mouse down
		if (handle_field) {
			fMouseDown = true;
			fFieldRect = new_rect;
			fCurrentColumn = new_column;
			fCurrentRow = new_row;
			fCurrentField = new_field;
			fCurrentCode = B_INSIDE_VIEW;
			BMessage* message = Window()->CurrentMessage();
			int32 buttons = 1;
			message->FindInt32("buttons", &buttons);
			fCurrentColumn->MouseDown(fMasterView, fCurrentRow,
				fCurrentField, fFieldRect, position, buttons);
		}

		if (!fEditMode) {

			fTargetRow = row;
			fTargetRowTop = rowTop;
			FindVisibleRect(fFocusRow, &fFocusRowRect);

			float leftWidgetBoundry = indent * kOutlineLevelIndent
				+ MAX(kLeftMargin, fMasterView->LatchWidth())
				- fMasterView->LatchWidth();
			fLatchRect.Set(leftWidgetBoundry, rowTop, leftWidgetBoundry
				+ fMasterView->LatchWidth(), rowTop + row->Height());
			if (fLatchRect.Contains(position) && row->HasLatch()) {
				fCurrentState = LATCH_CLICKED;
				if (fTargetRow->fNextSelected != 0)
					SetHighColor(fMasterView->Color(B_COLOR_SELECTION));
				else
					SetHighColor(fMasterView->Color(B_COLOR_BACKGROUND));

				FillRect(fLatchRect);
				if (fLatchRect.Contains(position)) {
					fMasterView->DrawLatch(this, fLatchRect, B_PRESSED_LATCH,
						row);
				} else {
					fMasterView->DrawLatch(this, fLatchRect,
						fTargetRow->fIsExpanded ? B_OPEN_LATCH
						: B_CLOSED_LATCH, row);
				}
			} else {
				Invalidate(fFocusRowRect);
				fFocusRow = fTargetRow;
				FindVisibleRect(fFocusRow, &fFocusRowRect);

				ASSERT(fTargetRow != 0);

				if ((modifiers() & B_CONTROL_KEY) == 0)
					DeselectAll();

				if ((modifiers() & B_SHIFT_KEY) != 0 && fFirstSelectedItem != 0
					&& fSelectionMode == B_MULTIPLE_SELECTION_LIST) {
					SelectRange(fFirstSelectedItem, fTargetRow);
				}
				else {
					if (fTargetRow->fNextSelected != 0) {
						// Unselect row
						fTargetRow->fNextSelected->fPrevSelected
							= fTargetRow->fPrevSelected;
						fTargetRow->fPrevSelected->fNextSelected
							= fTargetRow->fNextSelected;
						fTargetRow->fPrevSelected = 0;
						fTargetRow->fNextSelected = 0;
						fFirstSelectedItem = NULL;
					} else {
						// Select row
						if (fSelectionMode == B_SINGLE_SELECTION_LIST)
							DeselectAll();

						fTargetRow->fNextSelected
							= fSelectionListDummyHead.fNextSelected;
						fTargetRow->fPrevSelected
							= &fSelectionListDummyHead;
						fTargetRow->fNextSelected->fPrevSelected = fTargetRow;
						fTargetRow->fPrevSelected->fNextSelected = fTargetRow;
						fFirstSelectedItem = fTargetRow;
					}

					Invalidate(BRect(fVisibleRect.left, fTargetRowTop,
						fVisibleRect.right,
						fTargetRowTop + fTargetRow->Height()));
				}

				fCurrentState = ROW_CLICKED;
				if (fLastSelectedItem != fTargetRow)
					reset_click_count = true;
				fLastSelectedItem = fTargetRow;
				fMasterView->SelectionChanged();

			}
		}

		SetMouseEventMask(B_POINTER_EVENTS, B_LOCK_WINDOW_FOCUS |
			B_NO_POINTER_HISTORY);

	} else if (fFocusRow != 0) {
		// User clicked in open space, unhighlight focus row.
		FindVisibleRect(fFocusRow, &fFocusRowRect);
		fFocusRow = 0;
		Invalidate(fFocusRowRect);
	}

	// We stash the click counts here because the 'clicks' field
	// is not in the CurrentMessage() when MouseUp is called... ;(
	if (reset_click_count)
		fClickCount = 1;
	else
		Window()->CurrentMessage()->FindInt32("clicks", &fClickCount);
	fClickPoint = position;

}


void
OutlineView::MouseMoved(BPoint position, uint32 /*transit*/,
	const BMessage* /*dragMessage*/)
{
	if (!fMouseDown) {
		// Update fCurrentField
		bool handle_field = false;
		BField* new_field = 0;
		BRow* new_row = 0;
		BColumn* new_column = 0;
		BRect new_rect(0,0,0,0);
		if (position.y >=0 ) {
			float top;
			int32 indent;
			BRow* row = FindRow(position.y, &indent, &top);
			if (row && position.x >=0 ) {
				float x=0;
				for (int32 c=0;c<fMasterView->CountColumns();c++) {
					new_column = fMasterView->ColumnAt(c);
					if (!new_column->IsVisible())
						continue;
					if ((MAX(kLeftMargin,
						fMasterView->LatchWidth()) + x) + new_column->Width()
						> position.x) {

						if(new_column->WantsEvents()) {
							new_field = row->GetField(c);
							new_row = row;
							FindRect(new_row,&new_rect);
							new_rect.left = MAX(kLeftMargin,
								fMasterView->LatchWidth()) + x;
							new_rect.right = new_rect.left
								+ new_column->Width() - 1;
							handle_field = true;
						}
						break;
					}
					x += new_column->Width();
				}
			}
		}

		// Handle mouse moved
		if (handle_field) {
			if (new_field != fCurrentField) {
				if (fCurrentField) {
					fCurrentColumn->MouseMoved(fMasterView, fCurrentRow,
						fCurrentField, fFieldRect, position, 0,
						fCurrentCode = B_EXITED_VIEW);
				}
				fCurrentColumn = new_column;
				fCurrentRow = new_row;
				fCurrentField = new_field;
				fFieldRect = new_rect;
				if (fCurrentField) {
					fCurrentColumn->MouseMoved(fMasterView, fCurrentRow,
						fCurrentField, fFieldRect, position, 0,
						fCurrentCode = B_ENTERED_VIEW);
				}
			} else {
				if (fCurrentField) {
					fCurrentColumn->MouseMoved(fMasterView, fCurrentRow,
						fCurrentField, fFieldRect, position, 0,
						fCurrentCode = B_INSIDE_VIEW);
				}
			}
		} else {
			if (fCurrentField) {
				fCurrentColumn->MouseMoved(fMasterView, fCurrentRow,
					fCurrentField, fFieldRect, position, 0,
					fCurrentCode = B_EXITED_VIEW);
				fCurrentField = 0;
				fCurrentColumn = 0;
				fCurrentRow = 0;
			}
		}
	} else {
		if (fCurrentField) {
			if (fFieldRect.Contains(position)) {
				if (fCurrentCode == B_OUTSIDE_VIEW
					|| fCurrentCode == B_EXITED_VIEW) {
					fCurrentColumn->MouseMoved(fMasterView, fCurrentRow,
						fCurrentField, fFieldRect, position, 1,
						fCurrentCode = B_ENTERED_VIEW);
				} else {
					fCurrentColumn->MouseMoved(fMasterView, fCurrentRow,
						fCurrentField, fFieldRect, position, 1,
						fCurrentCode = B_INSIDE_VIEW);
				}
			} else {
				if (fCurrentCode == B_INSIDE_VIEW
					|| fCurrentCode == B_ENTERED_VIEW) {
					fCurrentColumn->MouseMoved(fMasterView, fCurrentRow,
						fCurrentField, fFieldRect, position, 1,
						fCurrentCode = B_EXITED_VIEW);
				} else {
					fCurrentColumn->MouseMoved(fMasterView, fCurrentRow,
						fCurrentField, fFieldRect, position, 1,
						fCurrentCode = B_OUTSIDE_VIEW);
				}
			}
		}
	}

	if (!fEditMode) {

		switch (fCurrentState) {
			case LATCH_CLICKED:
				if (fTargetRow->fNextSelected != 0)
					SetHighColor(fMasterView->Color(B_COLOR_SELECTION));
				else
					SetHighColor(fMasterView->Color(B_COLOR_BACKGROUND));

				FillRect(fLatchRect);
				if (fLatchRect.Contains(position)) {
					fMasterView->DrawLatch(this, fLatchRect, B_PRESSED_LATCH,
						fTargetRow);
				} else {
					fMasterView->DrawLatch(this, fLatchRect,
						fTargetRow->fIsExpanded ? B_OPEN_LATCH : B_CLOSED_LATCH,
						fTargetRow);
				}
				break;

			case ROW_CLICKED:
				if (abs((int)(position.x - fClickPoint.x)) > kRowDragSensitivity
					|| abs((int)(position.y - fClickPoint.y))
						> kRowDragSensitivity) {
					fCurrentState = DRAGGING_ROWS;
					fMasterView->InitiateDrag(fClickPoint,
						fTargetRow->fNextSelected != 0);
				}
				break;

			case DRAGGING_ROWS:
#if 0
				// falls through...
#else
				if (fTrackMouse /*&& message*/) {
					if (fVisibleRect.Contains(position)) {
						float top;
						int32 indent;
						BRow* target = FindRow(position.y, &indent, &top);
						if (target)
							SetFocusRow(target, true);
					}
				}
				break;
#endif

			default: {

				if (fTrackMouse /*&& message*/) {
					// Draw a highlight line...
					if (fVisibleRect.Contains(position)) {
						float top;
						int32 indent;
						BRow* target = FindRow(position.y, &indent, &top);
						if (target == fRollOverRow)
							break;
						if (fRollOverRow) {
							BRect rect;
							FindRect(fRollOverRow, &rect);
							Invalidate(rect);
						}
						fRollOverRow = target;
#if 0
						SetFocusRow(fRollOverRow,false);
#else
						PushState();
						SetDrawingMode(B_OP_BLEND);
						SetHighColor(255, 255, 255, 255);
						BRect rect;
						FindRect(fRollOverRow, &rect);
						rect.bottom -= 1.0;
						FillRect(rect);
						PopState();
#endif
					} else {
						if (fRollOverRow) {
							BRect rect;
							FindRect(fRollOverRow, &rect);
							Invalidate(rect);
							fRollOverRow = NULL;
						}
					}
				}
			}
		}
	}
}


void
OutlineView::MouseUp(BPoint position)
{
	if (fCurrentField) {
		fCurrentColumn->MouseUp(fMasterView, fCurrentRow, fCurrentField);
		fMouseDown = false;
	}

	if (fEditMode)
		return;

	switch (fCurrentState) {
		case LATCH_CLICKED:
			if (fLatchRect.Contains(position)) {
				fMasterView->ExpandOrCollapse(fTargetRow,
					!fTargetRow->fIsExpanded);
			}

			Invalidate(fLatchRect);
			fCurrentState = INACTIVE;
			break;

		case ROW_CLICKED:
			if (fClickCount > 1
				&& abs((int)fClickPoint.x - (int)position.x)
					< kDoubleClickMoveSensitivity
				&& abs((int)fClickPoint.y - (int)position.y)
					< kDoubleClickMoveSensitivity) {
				fMasterView->ItemInvoked();
			}
			fCurrentState = INACTIVE;
			break;

		case DRAGGING_ROWS:
			fCurrentState = INACTIVE;
			// Falls through

		default:
			if (fDropHighlightY != -1) {
				InvertRect(BRect(0,
					fDropHighlightY - kDropHighlightLineHeight / 2,
					1000000, fDropHighlightY + kDropHighlightLineHeight / 2));
					// Erase the old target line
				fDropHighlightY = -1;
			}
	}
}


void
OutlineView::MessageReceived(BMessage* message)
{
	if (message->WasDropped()) {
		fMasterView->MessageDropped(message,
			ConvertFromScreen(message->DropPoint()));
	} else {
		BView::MessageReceived(message);
	}
}


#if DOUBLE_BUFFERED_COLUMN_RESIZE

ColumnResizeBufferView*
OutlineView::ResizeBufferView()
{
	return fResizeBufferView;
}

#endif


void
OutlineView::ChangeFocusRow(bool up, bool updateSelection,
	bool addToCurrentSelection)
{
	int32 indent;
	float top;
	float newRowPos = 0;
	float verticalScroll = 0;

	if (fFocusRow) {
		// A row currently has the focus, get information about it
		newRowPos = fFocusRowRect.top + (up ? -4 : fFocusRow->Height() + 4);
		if (newRowPos < fVisibleRect.top + 20)
			verticalScroll = newRowPos - 20;
		else if (newRowPos > fVisibleRect.bottom - 20)
			verticalScroll = newRowPos - fVisibleRect.Height() + 20;
	} else
		newRowPos = fVisibleRect.top + 2;
			// no row is currently focused, set this to the top of the window
			// so we will select the first visible item in the list.

	BRow* newRow = FindRow(newRowPos, &indent, &top);
	if (newRow) {
		if (fFocusRow) {
			fFocusRowRect.right = 10000;
			Invalidate(fFocusRowRect);
		}
		BRow* oldFocusRow = fFocusRow;
		fFocusRow = newRow;
		fFocusRowRect.top = top;
		fFocusRowRect.left = 0;
		fFocusRowRect.right = 10000;
		fFocusRowRect.bottom = fFocusRowRect.top + fFocusRow->Height();
		Invalidate(fFocusRowRect);

		if (updateSelection) {
			if (!addToCurrentSelection
				|| fSelectionMode == B_SINGLE_SELECTION_LIST) {
				DeselectAll();
			}

			// if the focus row isn't selected, add it to the selection
			if (fFocusRow->fNextSelected == 0) {
				fFocusRow->fNextSelected
					= fSelectionListDummyHead.fNextSelected;
				fFocusRow->fPrevSelected = &fSelectionListDummyHead;
				fFocusRow->fNextSelected->fPrevSelected = fFocusRow;
				fFocusRow->fPrevSelected->fNextSelected = fFocusRow;
			} else if (oldFocusRow != NULL
				&& fSelectionListDummyHead.fNextSelected == oldFocusRow
				&& (((IndexOf(oldFocusRow->fNextSelected)
						< IndexOf(oldFocusRow)) == up)
					|| fFocusRow == oldFocusRow->fNextSelected)) {
					// if the focus row is selected, if:
					// 1. the previous focus row is last in the selection
					// 2a. the next selected row is now the focus row
					// 2b. or the next selected row is beyond the focus row
					//	   in the move direction
					// then deselect the previous focus row
				fSelectionListDummyHead.fNextSelected
					= oldFocusRow->fNextSelected;
				if (fSelectionListDummyHead.fNextSelected != NULL) {
					fSelectionListDummyHead.fNextSelected->fPrevSelected
						= &fSelectionListDummyHead;
					oldFocusRow->fNextSelected = NULL;
				}
				oldFocusRow->fPrevSelected = NULL;
			}

			fLastSelectedItem = fFocusRow;
		}
	} else
		Invalidate(fFocusRowRect);

	if (verticalScroll != 0) {
		BScrollBar* vScrollBar = ScrollBar(B_VERTICAL);
		float min, max;
		vScrollBar->GetRange(&min, &max);
		if (verticalScroll < min)
			verticalScroll = min;
		else if (verticalScroll > max)
			verticalScroll = max;

		vScrollBar->SetValue(verticalScroll);
	}

	if (newRow && updateSelection)
		fMasterView->SelectionChanged();
}


void
OutlineView::MoveFocusToVisibleRect()
{
	fFocusRow = 0;
	ChangeFocusRow(true, true, false);
}


BRow*
OutlineView::CurrentSelection(BRow* lastSelected) const
{
	BRow* row;
	if (lastSelected == 0)
		row = fSelectionListDummyHead.fNextSelected;
	else
		row = lastSelected->fNextSelected;


	if (row == &fSelectionListDummyHead)
		row = 0;

	return row;
}


void
OutlineView::ToggleFocusRowSelection(bool selectRange)
{
	if (fFocusRow == 0)
		return;

	if (selectRange && fSelectionMode == B_MULTIPLE_SELECTION_LIST)
		SelectRange(fLastSelectedItem, fFocusRow);
	else {
		if (fFocusRow->fNextSelected != 0) {
			// Unselect row
			fFocusRow->fNextSelected->fPrevSelected = fFocusRow->fPrevSelected;
			fFocusRow->fPrevSelected->fNextSelected = fFocusRow->fNextSelected;
			fFocusRow->fPrevSelected = 0;
			fFocusRow->fNextSelected = 0;
		} else {
			// Select row
			if (fSelectionMode == B_SINGLE_SELECTION_LIST)
				DeselectAll();

			fFocusRow->fNextSelected = fSelectionListDummyHead.fNextSelected;
			fFocusRow->fPrevSelected = &fSelectionListDummyHead;
			fFocusRow->fNextSelected->fPrevSelected = fFocusRow;
			fFocusRow->fPrevSelected->fNextSelected = fFocusRow;
		}
	}

	fLastSelectedItem = fFocusRow;
	fMasterView->SelectionChanged();
	Invalidate(fFocusRowRect);
}


void
OutlineView::ToggleFocusRowOpen()
{
	if (fFocusRow)
		fMasterView->ExpandOrCollapse(fFocusRow, !fFocusRow->fIsExpanded);
}


void
OutlineView::ExpandOrCollapse(BRow* parentRow, bool expand)
{
	// TODO: Could use CopyBits here to speed things up.

	if (parentRow == NULL)
		return;

	if (parentRow->fIsExpanded == expand)
		return;

	parentRow->fIsExpanded = expand;

	BRect parentRect;
	if (FindRect(parentRow, &parentRect)) {
		// Determine my new height
		float subTreeHeight = 0.0;
		if (parentRow->fIsExpanded)
			for (RecursiveOutlineIterator iterator(parentRow->fChildList);
			     iterator.CurrentRow();
			     iterator.GoToNext()
			    )
			{
				subTreeHeight += iterator.CurrentRow()->Height()+1;
			}
		else
			for (RecursiveOutlineIterator iterator(parentRow->fChildList);
			     iterator.CurrentRow();
			     iterator.GoToNext()
			    )
			{
				subTreeHeight -= iterator.CurrentRow()->Height()+1;
			}
		fItemsHeight += subTreeHeight;

		// Adjust focus row if necessary.
		if (FindRect(fFocusRow, &fFocusRowRect) == false) {
			// focus row is in a subtree that has collapsed,
			// move it up to the parent.
			fFocusRow = parentRow;
			FindRect(fFocusRow, &fFocusRowRect);
		}

		Invalidate(BRect(0, parentRect.top, fVisibleRect.right,
			fVisibleRect.bottom));
		FixScrollBar(false);
	}
}

void
OutlineView::RemoveRow(BRow* row)
{
	if (row == NULL)
		return;

	BRow* parentRow = NULL;
	bool parentIsVisible = false;
	FindParent(row, &parentRow, &parentIsVisible);
		// NOTE: This could be a root row without a parent, in which case
		// it is always visible, though.

	// Adjust height for the visible sub-tree that is going to be removed.
	float subTreeHeight = 0.0f;
	if (parentIsVisible && (parentRow == NULL || parentRow->fIsExpanded)) {
		// The row itself is visible at least.
		subTreeHeight = row->Height() + 1;
		if (row->fIsExpanded) {
			// Adjust for the height of visible sub-items as well.
			// (By default, the iterator follows open branches only.)
			for (RecursiveOutlineIterator iterator(row->fChildList);
				iterator.CurrentRow(); iterator.GoToNext())
				subTreeHeight += iterator.CurrentRow()->Height() + 1;
		}
		BRect invalid;
		if (FindRect(row, &invalid)) {
			invalid.bottom = Bounds().bottom;
			if (invalid.IsValid())
				Invalidate(invalid);
		}
	}

	fItemsHeight -= subTreeHeight;

	FixScrollBar(false);
	int32 indent = 0;
	float top = 0.0;
	if (FindRow(fVisibleRect.top, &indent, &top) == NULL && ScrollBar(B_VERTICAL) != NULL) {
		// after removing this row, no rows are actually visible any more,
		// force a scroll to make them visible again
		if (fItemsHeight > fVisibleRect.Height())
			ScrollBy(0.0, fItemsHeight - fVisibleRect.Height() - Bounds().top);
		else
			ScrollBy(0.0, -Bounds().top);
	}
	if (parentRow != NULL) {
		parentRow->fChildList->RemoveItem(row);
		if (parentRow->fChildList->CountItems() == 0) {
			delete parentRow->fChildList;
			parentRow->fChildList = 0;
			// It was the last child row of the parent, which also means the
			// latch disappears.
			BRect parentRowRect;
			if (parentIsVisible && FindRect(parentRow, &parentRowRect))
				Invalidate(parentRowRect);
		}
	} else
		fRows.RemoveItem(row);

	// Adjust focus row if necessary.
	if (fFocusRow && !FindRect(fFocusRow, &fFocusRowRect)) {
		// focus row is in a subtree that is gone, move it up to the parent.
		fFocusRow = parentRow;
		if (fFocusRow)
			FindRect(fFocusRow, &fFocusRowRect);
	}

	// Remove this from the selection if necessary
	if (row->fNextSelected != 0) {
		row->fNextSelected->fPrevSelected = row->fPrevSelected;
		row->fPrevSelected->fNextSelected = row->fNextSelected;
		row->fPrevSelected = 0;
		row->fNextSelected = 0;
		fMasterView->SelectionChanged();
	}

	fCurrentColumn = 0;
	fCurrentRow = 0;
	fCurrentField = 0;
}


BRowContainer*
OutlineView::RowList()
{
	return &fRows;
}


void
OutlineView::UpdateRow(BRow* row)
{
	if (row) {
		// Determine if this row has changed its sort order
		BRow* parentRow = NULL;
		bool parentIsVisible = false;
		FindParent(row, &parentRow, &parentIsVisible);

		BRowContainer* list = (parentRow == NULL) ? &fRows : parentRow->fChildList;

		if(list) {
			int32 rowIndex = list->IndexOf(row);
			ASSERT(rowIndex >= 0);
			ASSERT(list->ItemAt(rowIndex) == row);

			bool rowMoved = false;
			if (rowIndex > 0 && CompareRows(list->ItemAt(rowIndex - 1), row) > 0)
				rowMoved = true;

			if (rowIndex < list->CountItems() - 1 && CompareRows(list->ItemAt(rowIndex + 1),
				row) < 0)
				rowMoved = true;

			if (rowMoved) {
				// Sort location of this row has changed.
				// Remove and re-add in the right spot
				SortList(list, parentIsVisible && (parentRow == NULL || parentRow->fIsExpanded));
			} else if (parentIsVisible && (parentRow == NULL || parentRow->fIsExpanded)) {
				BRect invalidRect;
				if (FindVisibleRect(row, &invalidRect))
					Invalidate(invalidRect);
			}
		}
	}
}


void
OutlineView::AddRow(BRow* row, int32 Index, BRow* parentRow)
{
	if (!row)
		return;

	row->fParent = parentRow;

	if (fMasterView->SortingEnabled() && !fSortColumns->IsEmpty()) {
		// Ignore index here.
		if (parentRow) {
			if (parentRow->fChildList == NULL)
				parentRow->fChildList = new BRowContainer;

			AddSorted(parentRow->fChildList, row);
		} else
			AddSorted(&fRows, row);
	} else {
		// Note, a -1 index implies add to end if sorting is not enabled
		if (parentRow) {
			if (parentRow->fChildList == 0)
				parentRow->fChildList = new BRowContainer;

			if (Index < 0 || Index > parentRow->fChildList->CountItems())
				parentRow->fChildList->AddItem(row);
			else
				parentRow->fChildList->AddItem(row, Index);
		} else {
			if (Index < 0 || Index >= fRows.CountItems())
				fRows.AddItem(row);
			else
				fRows.AddItem(row, Index);
		}
	}

#ifdef DOUBLE_BUFFERED_COLUMN_RESIZE
	ResizeBufferView()->UpdateMaxHeight(row->Height());
#endif

	if (parentRow == 0 || parentRow->fIsExpanded)
		fItemsHeight += row->Height() + 1;

	FixScrollBar(false);

	BRect newRowRect;
	const bool newRowIsInOpenBranch = FindRect(row, &newRowRect);

	if (newRowIsInOpenBranch) {
		if (fFocusRow && fFocusRowRect.top > newRowRect.bottom) {
			// The focus row has moved.
			Invalidate(fFocusRowRect);
			FindRect(fFocusRow, &fFocusRowRect);
			Invalidate(fFocusRowRect);
		}

		if (fCurrentState == INACTIVE) {
			if (newRowRect.bottom < fVisibleRect.top) {
				// The new row is totally above the current viewport, move
				// everything down and redraw the first line.
				BRect source(fVisibleRect);
				BRect dest(fVisibleRect);
				source.bottom -= row->Height() + 1;
				dest.top += row->Height() + 1;
				CopyBits(source, dest);
				Invalidate(BRect(fVisibleRect.left, fVisibleRect.top, fVisibleRect.right,
					fVisibleRect.top + newRowRect.Height()));
			} else if (newRowRect.top < fVisibleRect.bottom) {
				// New item is somewhere in the current region.  Scroll everything
				// beneath it down and invalidate just the new row rect.
				BRect source(fVisibleRect.left, newRowRect.top, fVisibleRect.right,
					fVisibleRect.bottom - newRowRect.Height());
				BRect dest(source);
				dest.OffsetBy(0, newRowRect.Height() + 1);
				CopyBits(source, dest);
				Invalidate(newRowRect);
			} // otherwise, this is below the currently visible region
		} else {
			// Adding the item may have caused the item that the user is currently
			// selected to move.  This would cause annoying drawing and interaction
			// bugs, as the position of that item is cached.  If this happens, resize
			// the scroll bar, then scroll back so the selected item is in view.
			BRect targetRect;
			if (FindRect(fTargetRow, &targetRect)) {
				float delta = targetRect.top - fTargetRowTop;
				if (delta != 0) {
					// This causes a jump because ScrollBy will copy a chunk of the view.
					// Since the actual contents of the view have been offset, we don't
					// want this, we just want to change the virtual origin of the window.
					// Constrain the clipping region so everything is clipped out so no
					// copy occurs.
					//
					//	xxx this currently doesn't work if the scroll bars aren't enabled.
					//  everything will still move anyway.  A minor annoyance.
					BRegion emptyRegion;
					ConstrainClippingRegion(&emptyRegion);
					PushState();
					ScrollBy(0, delta);
					PopState();
					ConstrainClippingRegion(NULL);

					fTargetRowTop += delta;
					fClickPoint.y += delta;
					fLatchRect.OffsetBy(0, delta);
				}
			}
		}
	}

	// If the parent was previously childless, it will need to have a latch
	// drawn.
	BRect parentRect;
	if (parentRow && parentRow->fChildList->CountItems() == 1
		&& FindVisibleRect(parentRow, &parentRect))
		Invalidate(parentRect);
}


void
OutlineView::FixScrollBar(bool scrollToFit)
{
	BScrollBar* vScrollBar = ScrollBar(B_VERTICAL);
	if (vScrollBar) {
		if (fItemsHeight > fVisibleRect.Height()) {
			float maxScrollBarValue = fItemsHeight - fVisibleRect.Height();
			vScrollBar->SetProportion(fVisibleRect.Height() / fItemsHeight);

			// If the user is scrolled down too far when making the range smaller, the list
			// will jump suddenly, which is undesirable.  In this case, don't fix the scroll
			// bar here. In ScrollTo, it checks to see if this has occured, and will
			// fix the scroll bars sneakily if the user has scrolled up far enough.
			if (scrollToFit || vScrollBar->Value() <= maxScrollBarValue) {
				vScrollBar->SetRange(0.0, maxScrollBarValue);
				vScrollBar->SetSteps(20.0, fVisibleRect.Height());
			}
		} else if (vScrollBar->Value() == 0.0 || fItemsHeight == 0.0)
			vScrollBar->SetRange(0.0, 0.0);		// disable scroll bar.
	}
}


void
OutlineView::AddSorted(BRowContainer* list, BRow* row)
{
	if (list && row) {
		// Find general vicinity with binary search.
		int32 lower = 0;
		int32 upper = list->CountItems()-1;
		while( lower < upper ) {
			int32 middle = lower + (upper-lower+1)/2;
			int32 cmp = CompareRows(row, list->ItemAt(middle));
			if( cmp < 0 ) upper = middle-1;
			else if( cmp > 0 ) lower = middle+1;
			else lower = upper = middle;
		}

		// At this point, 'upper' and 'lower' at the last found item.
		// Arbitrarily use 'upper' and determine the final insertion
		// point -- either before or after this item.
		if( upper < 0 ) upper = 0;
		else if( upper < list->CountItems() ) {
			if( CompareRows(row, list->ItemAt(upper)) > 0 ) upper++;
		}

		if (upper >= list->CountItems())
			list->AddItem(row);				// Adding to end.
		else
			list->AddItem(row, upper);		// Insert
	}
}


int32
OutlineView::CompareRows(BRow* row1, BRow* row2)
{
	int32 itemCount (fSortColumns->CountItems());
	if (row1 && row2) {
		for (int32 index = 0; index < itemCount; index++) {
			BColumn* column = (BColumn*) fSortColumns->ItemAt(index);
			int comp = 0;
			BField* field1 = (BField*) row1->GetField(column->fFieldID);
			BField* field2 = (BField*) row2->GetField(column->fFieldID);
			if (field1 && field2)
				comp = column->CompareFields(field1, field2);

			if (!column->fSortAscending)
				comp = -comp;

			if (comp != 0)
				return comp;
		}
	}
	return 0;
}


void
OutlineView::FrameResized(float width, float height)
{
	fVisibleRect.right = fVisibleRect.left + width;
	fVisibleRect.bottom = fVisibleRect.top + height;
	FixScrollBar(true);
	_inherited::FrameResized(width, height);
}


void
OutlineView::ScrollTo(BPoint position)
{
	fVisibleRect.OffsetTo(position.x, position.y);

	// In FixScrollBar, we might not have been able to change the size of
	// the scroll bar because the user was scrolled down too far.  Take
	// this opportunity to sneak it in if we can.
	BScrollBar* vScrollBar = ScrollBar(B_VERTICAL);
	float maxScrollBarValue = fItemsHeight - fVisibleRect.Height();
	float min, max;
	vScrollBar->GetRange(&min, &max);
	if (max != maxScrollBarValue && position.y > maxScrollBarValue)
		FixScrollBar(true);

	_inherited::ScrollTo(position);
}


const BRect&
OutlineView::VisibleRect() const
{
	return fVisibleRect;
}


bool
OutlineView::FindVisibleRect(BRow* row, BRect* _rect)
{
	if (row && _rect) {
		float line = 0.0;
		for (RecursiveOutlineIterator iterator(&fRows); iterator.CurrentRow();
			iterator.GoToNext()) {

			if (iterator.CurrentRow() == row) {
				_rect->Set(fVisibleRect.left, line, fVisibleRect.right,
					line + row->Height());
				return line <= fVisibleRect.bottom;
			}

			line += iterator.CurrentRow()->Height() + 1;
		}
	}
	return false;
}


bool
OutlineView::FindRect(const BRow* row, BRect* _rect)
{
	float line = 0.0;
	for (RecursiveOutlineIterator iterator(&fRows); iterator.CurrentRow();
		iterator.GoToNext()) {
		if (iterator.CurrentRow() == row) {
			_rect->Set(fVisibleRect.left, line, fVisibleRect.right,
				line + row->Height());
			return true;
		}

		line += iterator.CurrentRow()->Height() + 1;
	}

	return false;
}


void
OutlineView::ScrollTo(const BRow* row)
{
	BRect rect;
	if (FindRect(row, &rect)) {
		BRect bounds = Bounds();
		if (rect.top < bounds.top)
			ScrollTo(BPoint(bounds.left, rect.top));
		else if (rect.bottom > bounds.bottom)
			ScrollBy(0, rect.bottom - bounds.bottom);
	}
}


void
OutlineView::DeselectAll()
{
	// Invalidate all selected rows
	float line = 0.0;
	for (RecursiveOutlineIterator iterator(&fRows); iterator.CurrentRow();
		iterator.GoToNext()) {
		if (line > fVisibleRect.bottom)
			break;

		BRow* row = iterator.CurrentRow();
		if (line + row->Height() > fVisibleRect.top) {
			if (row->fNextSelected != 0)
				Invalidate(BRect(fVisibleRect.left, line, fVisibleRect.right,
					line + row->Height()));
		}

		line += row->Height() + 1;
	}

	// Set items not selected
	while (fSelectionListDummyHead.fNextSelected != &fSelectionListDummyHead) {
		BRow* row = fSelectionListDummyHead.fNextSelected;
		row->fNextSelected->fPrevSelected = row->fPrevSelected;
		row->fPrevSelected->fNextSelected = row->fNextSelected;
		row->fNextSelected = 0;
		row->fPrevSelected = 0;
	}
}


BRow*
OutlineView::FocusRow() const
{
	return fFocusRow;
}


void
OutlineView::SetFocusRow(BRow* row, bool Select)
{
	if (row) {
		if (Select)
			AddToSelection(row);

		if (fFocusRow == row)
			return;

		Invalidate(fFocusRowRect); // invalidate previous

		fTargetRow = fFocusRow = row;

		FindVisibleRect(fFocusRow, &fFocusRowRect);
		Invalidate(fFocusRowRect); // invalidate current

		fFocusRowRect.right = 10000;
		fMasterView->SelectionChanged();
	}
}


bool
OutlineView::SortList(BRowContainer* list, bool isVisible)
{
	if (list) {
		// Shellsort
		BRow** items
			= (BRow**) BObjectList<BRow>::Private(list).AsBList()->Items();
		int32 numItems = list->CountItems();
		int h;
		for (h = 1; h < numItems / 9; h = 3 * h + 1)
			;

		for (;h > 0; h /= 3) {
			for (int step = h; step < numItems; step++) {
				BRow* temp = items[step];
				int i;
				for (i = step - h; i >= 0; i -= h) {
					if (CompareRows(temp, items[i]) < 0)
						items[i + h] = items[i];
					else
						break;
				}

				items[i + h] = temp;
			}
		}

		if (isVisible) {
			Invalidate();

			InvalidateCachedPositions();
			int lockCount = Window()->CountLocks();
			for (int i = 0; i < lockCount; i++)
				Window()->Unlock();

			while (lockCount--)
				if (!Window()->Lock())
					return false;	// Window is gone...
		}
	}
	return true;
}


int32
OutlineView::DeepSortThreadEntry(void* _outlineView)
{
	((OutlineView*) _outlineView)->DeepSort();
	return 0;
}


void
OutlineView::DeepSort()
{
	struct stack_entry {
		bool isVisible;
		BRowContainer* list;
		int32 listIndex;
	} stack[kMaxDepth];
	int32 stackTop = 0;

	stack[stackTop].list = &fRows;
	stack[stackTop].isVisible = true;
	stack[stackTop].listIndex = 0;
	fNumSorted = 0;

	if (Window()->Lock() == false)
		return;

	bool doneSorting = false;
	while (!doneSorting && !fSortCancelled) {

		stack_entry* currentEntry = &stack[stackTop];

		// xxx Can make the invalidate area smaller by finding the rect for the
		// parent item and using that as the top of the invalid rect.

		bool haveLock = SortList(currentEntry->list, currentEntry->isVisible);
		if (!haveLock)
			return ;	// window is gone.

		// Fix focus rect.
		InvalidateCachedPositions();
		if (fCurrentState != INACTIVE)
			fCurrentState = INACTIVE;	// sorry...

		// next list.
		bool foundNextList = false;
		while (!foundNextList && !fSortCancelled) {
			for (int32 index = currentEntry->listIndex; index < currentEntry->list->CountItems();
				index++) {
				BRow* parentRow = currentEntry->list->ItemAt(index);
				BRowContainer* childList = parentRow->fChildList;
				if (childList != 0) {
					currentEntry->listIndex = index + 1;
					stackTop++;
					ASSERT(stackTop < kMaxDepth);
					stack[stackTop].listIndex = 0;
					stack[stackTop].list = childList;
					stack[stackTop].isVisible = (currentEntry->isVisible && parentRow->fIsExpanded);
					foundNextList = true;
					break;
				}
			}

			if (!foundNextList) {
				// back up
				if (--stackTop < 0) {
					doneSorting = true;
					break;
				}

				currentEntry = &stack[stackTop];
			}
		}
	}

	Window()->Unlock();
}


void
OutlineView::StartSorting()
{
	// If this view is not yet attached to a window, don't start a sort thread!
	if (Window() == NULL)
		return;

	if (fSortThread != B_BAD_THREAD_ID) {
		thread_info tinfo;
		if (get_thread_info(fSortThread, &tinfo) == B_OK) {
			// Unlock window so this won't deadlock (sort thread is probably
			// waiting to lock window).

			int lockCount = Window()->CountLocks();
			for (int i = 0; i < lockCount; i++)
				Window()->Unlock();

			fSortCancelled = true;
			int32 status;
			wait_for_thread(fSortThread, &status);

			while (lockCount--)
				if (!Window()->Lock())
					return ;	// Window is gone...
		}
	}

	fSortCancelled = false;
	fSortThread = spawn_thread(DeepSortThreadEntry, "sort_thread", B_NORMAL_PRIORITY, this);
	resume_thread(fSortThread);
}


void
OutlineView::SelectRange(BRow* start, BRow* end)
{
	if (!start || !end)
		return;

	if (start == end)	// start is always selected when this is called
		return;

	RecursiveOutlineIterator iterator(&fRows, false);
	while (iterator.CurrentRow() != 0) {
		if (iterator.CurrentRow() == end) {
			// reverse selection, swap to fix special case
			BRow* temp = start;
			start = end;
			end = temp;
			break;
		} else if (iterator.CurrentRow() == start)
			break;

		iterator.GoToNext();
	}

	while (true) {
		BRow* row = iterator.CurrentRow();
		if (row) {
			if (row->fNextSelected == 0) {
				row->fNextSelected = fSelectionListDummyHead.fNextSelected;
				row->fPrevSelected = &fSelectionListDummyHead;
				row->fNextSelected->fPrevSelected = row;
				row->fPrevSelected->fNextSelected = row;
			}
		} else
			break;

		if (row == end)
			break;

		iterator.GoToNext();
	}

	Invalidate();  // xxx make invalidation smaller
}


bool
OutlineView::FindParent(BRow* row, BRow** outParent, bool* outParentIsVisible)
{
	bool result = false;
	if (row != NULL && outParent != NULL) {
		*outParent = row->fParent;

		if (outParentIsVisible != NULL) {
			// Walk up the parent chain to determine if this row is visible
			*outParentIsVisible = true;
			for (BRow* currentRow = row->fParent; currentRow != NULL;
				currentRow = currentRow->fParent) {
				if (!currentRow->fIsExpanded) {
					*outParentIsVisible = false;
					break;
				}
			}
		}

		result = *outParent != NULL;
	}

	return result;
}


int32
OutlineView::IndexOf(BRow* row)
{
	if (row) {
		if (row->fParent == 0)
			return fRows.IndexOf(row);

		ASSERT(row->fParent->fChildList);
		return row->fParent->fChildList->IndexOf(row);
	}

	return B_ERROR;
}


void
OutlineView::InvalidateCachedPositions()
{
	if (fFocusRow)
		FindRect(fFocusRow, &fFocusRowRect);
}


float
OutlineView::GetColumnPreferredWidth(BColumn* column)
{
	float preferred = 0.0;
	for (RecursiveOutlineIterator iterator(&fRows); BRow* row =
		iterator.CurrentRow(); iterator.GoToNext()) {
		BField* field = row->GetField(column->fFieldID);
		if (field) {
			float width = column->GetPreferredWidth(field, this)
				+ iterator.CurrentLevel() * kOutlineLevelIndent;
			preferred = max_c(preferred, width);
		}
	}

	BString name;
	column->GetColumnName(&name);
	preferred = max_c(preferred, StringWidth(name));

	// Constrain to preferred width. This makes the method do a little
	// more than asked, but it's for convenience.
	if (preferred < column->MinWidth())
		preferred = column->MinWidth();
	else if (preferred > column->MaxWidth())
		preferred = column->MaxWidth();

	return preferred;
}


// #pragma mark -


RecursiveOutlineIterator::RecursiveOutlineIterator(BRowContainer* list,
	bool openBranchesOnly)
	:
	fStackIndex(0),
	fCurrentListIndex(0),
	fCurrentListDepth(0),
	fOpenBranchesOnly(openBranchesOnly)
{
	if (list == 0 || list->CountItems() == 0)
		fCurrentList = 0;
	else
		fCurrentList = list;
}


BRow*
RecursiveOutlineIterator::CurrentRow() const
{
	if (fCurrentList == 0)
		return 0;

	return fCurrentList->ItemAt(fCurrentListIndex);
}


void
RecursiveOutlineIterator::GoToNext()
{
	if (fCurrentList == 0)
		return;
	if (fCurrentListIndex < 0 || fCurrentListIndex >= fCurrentList->CountItems()) {
		fCurrentList = 0;
		return;
	}

	BRow* currentRow = fCurrentList->ItemAt(fCurrentListIndex);
	if(currentRow) {
		if (currentRow->fChildList && (currentRow->fIsExpanded || !fOpenBranchesOnly)
			&& currentRow->fChildList->CountItems() > 0) {
			// Visit child.
			// Put current list on the stack if it needs to be revisited.
			if (fCurrentListIndex < fCurrentList->CountItems() - 1) {
				fStack[fStackIndex].fRowSet = fCurrentList;
				fStack[fStackIndex].fIndex = fCurrentListIndex + 1;
				fStack[fStackIndex].fDepth = fCurrentListDepth;
				fStackIndex++;
			}

			fCurrentList = currentRow->fChildList;
			fCurrentListIndex = 0;
			fCurrentListDepth++;
		} else if (fCurrentListIndex < fCurrentList->CountItems() - 1)
			fCurrentListIndex++; // next item in current list
		else if (--fStackIndex >= 0) {
			fCurrentList = fStack[fStackIndex].fRowSet;
			fCurrentListIndex = fStack[fStackIndex].fIndex;
			fCurrentListDepth = fStack[fStackIndex].fDepth;
		} else
			fCurrentList = 0;
	}
}


int32
RecursiveOutlineIterator::CurrentLevel() const
{
	return fCurrentListDepth;
}