/*
 * Copyright 2006, Haiku.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *		Stephan Aßmus <superstippi@gmx.de>
 */

#include "IconButton.h"

#include <new>
#include <stdio.h>

#include <Application.h>
#include <Bitmap.h>
#include <Control.h>
#include <Entry.h>
#include <Looper.h>
#include <Message.h>
#include <Mime.h>
#include <Path.h>
#include <Region.h>
#include <Roster.h>
#include <TranslationUtils.h>
#include <Window.h>

using std::nothrow;

// constructor
IconButton::IconButton(const char* name, uint32 id, const char* label,
					   BMessage* message, BHandler* target)
	: BView(BRect(0.0, 0.0, 10.0, 10.0), name, B_FOLLOW_NONE, B_WILL_DRAW),
	  BInvoker(message, target),
	  fButtonState(STATE_ENABLED),
	  fID(id),
	  fNormalBitmap(NULL),
	  fDisabledBitmap(NULL),
	  fClickedBitmap(NULL),
	  fDisabledClickedBitmap(NULL),
	  fLabel(label),
	  fTargetCache(target)
{
	SetLowColor(ui_color(B_PANEL_BACKGROUND_COLOR));
	SetViewColor(B_TRANSPARENT_32_BIT);
}

// destructor
IconButton::~IconButton()
{
	_DeleteBitmaps();
}

// MessageReceived
void
IconButton::MessageReceived(BMessage* message)
{
	switch (message->what) {
		default:
			BView::MessageReceived(message);
			break;
	}
}

// AttachedToWindow
void
IconButton::AttachedToWindow()
{
	SetTarget(fTargetCache);
	if (!Target()) {
		SetTarget(Window());
	}
}

// Draw
void
IconButton::Draw(BRect area)
{
	rgb_color background = LowColor();
	if (MView* parent = dynamic_cast<MView*>(Parent()))
		background = parent->getcolor();
	rgb_color lightShadow, shadow, darkShadow, light;
	BRect r(Bounds());
	BBitmap* bitmap = fNormalBitmap;
	// adjust colors and bitmap according to flags
	if (IsEnabled()) {
		lightShadow = tint_color(background, B_DARKEN_1_TINT);
		shadow = tint_color(background, B_DARKEN_2_TINT);
		darkShadow = tint_color(background, B_DARKEN_4_TINT);
		light = tint_color(background, B_LIGHTEN_MAX_TINT);
		SetHighColor(0, 0, 0, 255);
	} else {
		lightShadow = tint_color(background, 1.11);
		shadow = tint_color(background, B_DARKEN_1_TINT);
		darkShadow = tint_color(background, B_DARKEN_2_TINT);
		light = tint_color(background, B_LIGHTEN_2_TINT);
		bitmap = fDisabledBitmap;
		SetHighColor(tint_color(background, B_DISABLED_LABEL_TINT));
	}
	if (_HasFlags(STATE_PRESSED) || _HasFlags(STATE_FORCE_PRESSED)) {
		if (IsEnabled())  {
//			background = tint_color(background, B_DARKEN_2_TINT);
//			background = tint_color(background, B_LIGHTEN_1_TINT);
			background = tint_color(background, B_DARKEN_1_TINT);
			bitmap = fClickedBitmap;
		} else {
//			background = tint_color(background, B_DARKEN_1_TINT);
//			background = tint_color(background, (B_NO_TINT + B_LIGHTEN_1_TINT) / 2.0);
			background = tint_color(background, (B_NO_TINT + B_DARKEN_1_TINT) / 2.0);
			bitmap = fDisabledClickedBitmap;
		}
		// background
		SetLowColor(background);
		r.InsetBy(2.0, 2.0);
		StrokeLine(r.LeftBottom(), r.LeftTop(), B_SOLID_LOW);
		StrokeLine(r.LeftTop(), r.RightTop(), B_SOLID_LOW);
		r.InsetBy(-2.0, -2.0);
	}
	// draw frame only if tracking
	if (DrawBorder()) {
		if (_HasFlags(STATE_PRESSED) || _HasFlags(STATE_FORCE_PRESSED))
			DrawPressedBorder(r, background, shadow, darkShadow, lightShadow, light);
		else
			DrawNormalBorder(r, background, shadow, darkShadow, lightShadow, light);
		r.InsetBy(2.0, 2.0);
	} else
		_DrawFrame(r, background, background, background, background);
	float width = Bounds().Width();
	float height = Bounds().Height();
	// bitmap
	BRegion originalClippingRegion;
	if (bitmap && bitmap->IsValid()) {
		float x = floorf((width - bitmap->Bounds().Width()) / 2.0 + 0.5);
		float y = floorf((height - bitmap->Bounds().Height()) / 2.0 + 0.5);
		BPoint point(x, y);
		if (_HasFlags(STATE_PRESSED) || _HasFlags(STATE_FORCE_PRESSED))
			point += BPoint(1.0, 1.0);
		if (bitmap->ColorSpace() == B_RGBA32 || bitmap->ColorSpace() == B_RGBA32_BIG) {
			FillRect(r, B_SOLID_LOW);
			SetDrawingMode(B_OP_ALPHA);
			SetBlendingMode(B_PIXEL_ALPHA, B_ALPHA_OVERLAY);
		}
		DrawBitmap(bitmap, point);
		// constrain clipping region
		BRegion region= originalClippingRegion;
		GetClippingRegion(&region);
		region.Exclude(bitmap->Bounds().OffsetByCopy(point));
		ConstrainClippingRegion(&region);
	}
	// background
	SetDrawingMode(B_OP_COPY);
	FillRect(r, B_SOLID_LOW);
	ConstrainClippingRegion(&originalClippingRegion);
	// label
	if (fLabel.CountChars() > 0) {
		SetDrawingMode(B_OP_COPY);
		font_height fh;
		GetFontHeight(&fh);
		float y = Bounds().bottom - 4.0;
		y -= fh.descent;
		float x = (width - StringWidth(fLabel.String())) / 2.0;
		DrawString(fLabel.String(), BPoint(x, y));
	}
}

// MouseDown
void
IconButton::MouseDown(BPoint where)
{
	if (IsValid()) {
		if (_HasFlags(STATE_ENABLED)/* && !_HasFlags(STATE_FORCE_PRESSED)*/) {
			if (Bounds().Contains(where)) {
				SetMouseEventMask(B_POINTER_EVENTS, B_LOCK_WINDOW_FOCUS);
				_AddFlags(STATE_PRESSED | STATE_TRACKING);
			} else {
				_ClearFlags(STATE_PRESSED | STATE_TRACKING);
			}
		}
	}
}

// MouseUp
void
IconButton::MouseUp(BPoint where)
{
	if (IsValid()) {
//		if (!_HasFlags(STATE_FORCE_PRESSED)) {
			if (_HasFlags(STATE_ENABLED) && _HasFlags(STATE_PRESSED) && Bounds().Contains(where))
				Invoke();
			else if (Bounds().Contains(where))
				_AddFlags(STATE_INSIDE);
			_ClearFlags(STATE_PRESSED | STATE_TRACKING);
//		}
	}
}

// MouseMoved
void
IconButton::MouseMoved(BPoint where, uint32 transit, const BMessage* message)
{
	if (IsValid()) {
		uint32 buttons = 0;
		Window()->CurrentMessage()->FindInt32("buttons", (int32*)&buttons);
		// catch a mouse up event that we might have missed
		if (!buttons && _HasFlags(STATE_PRESSED)) {
			MouseUp(where);
			return;
		}
		if (buttons && !_HasFlags(STATE_TRACKING))
			return;
		if ((transit == B_INSIDE_VIEW || transit == B_ENTERED_VIEW)
			&& _HasFlags(STATE_ENABLED))
			_AddFlags(STATE_INSIDE);
		else 
			_ClearFlags(STATE_INSIDE);
		if (_HasFlags(STATE_TRACKING)) {
			if (Bounds().Contains(where))
				_AddFlags(STATE_PRESSED);
			else
				_ClearFlags(STATE_PRESSED);
		}
	}
}

// GetPreferredSize
void
IconButton::GetPreferredSize(float* width, float* height)
{
	layoutprefs();

	if (width)
		*width = mpm.mini.x;
	if (height)
		*height = mpm.mini.y;
}

// Invoke
status_t
IconButton::Invoke(BMessage* message)
{
	if (!message)
		message = Message();
	if (message) {
		BMessage clone(*message);
		clone.AddInt64("be:when", system_time());
		clone.AddPointer("be:source", (BView*)this);
		clone.AddInt32("be:value", Value());
		clone.AddInt32("id", ID());
		return BInvoker::Invoke(&clone);
	}
	return BInvoker::Invoke(message);
}

#define MIN_SPACE 15.0

// layoutprefs
minimax
IconButton::layoutprefs()
{
	float minWidth = 0.0;
	float minHeight = 0.0;
	if (IsValid()) {
		minWidth += fNormalBitmap->Bounds().IntegerWidth() + 1.0;
		minHeight += fNormalBitmap->Bounds().IntegerHeight() + 1.0;
	} else {
		minWidth += MIN_SPACE;
		minHeight += MIN_SPACE;
	}
	if (minWidth < MIN_SPACE)
		minWidth = MIN_SPACE;
	if (minHeight < MIN_SPACE)
		minHeight = MIN_SPACE;
	if (fLabel.CountChars() > 0) {
		font_height fh;
		GetFontHeight(&fh);
		minHeight += ceilf(fh.ascent + fh.descent) + 4.0;
		minWidth += StringWidth(fLabel.String()) + 4.0;
	}
	mpm.mini.x = minWidth + 4.0;
//	mpm.maxi.x = 10000.0 + 4.0;
	mpm.maxi.x = minWidth + 4.0;
	mpm.mini.y = minHeight + 4.0;
//	mpm.maxi.y = 10000.0 + 4.0;
	mpm.maxi.y = minHeight + 4.0;
	mpm.weight = 0.0;
	return mpm;
}

// layout
BRect
IconButton::layout(BRect rect)
{
	MoveTo(rect.LeftTop());
	ResizeTo(rect.Width(), rect.Height());
	return Frame();
}

// SetPressed
void
IconButton::SetPressed(bool pressed)
{
	if (pressed)
		_AddFlags(STATE_FORCE_PRESSED);
	else
		_ClearFlags(STATE_FORCE_PRESSED);
}

// IsPressed
bool
IconButton::IsPressed() const
{
	return _HasFlags(STATE_FORCE_PRESSED);
}

// SetIcon
status_t
IconButton::SetIcon(const char* pathToBitmap)
{
	status_t status = B_BAD_VALUE;
	if (pathToBitmap) {
		BBitmap* fileBitmap = NULL;
		// try to load bitmap from either relative or absolute path
		BEntry entry(pathToBitmap, true);
		if (!entry.Exists()) {
			app_info info;
			status = be_app->GetAppInfo(&info);
			if (status == B_OK) {
				BEntry app_entry(&info.ref, true);
				BPath path;
				app_entry.GetPath(&path);
				status = path.InitCheck();
				if (status == B_OK) {
					status = path.GetParent(&path);
					if (status == B_OK) {
						status = path.Append(pathToBitmap, true);
						if (status == B_OK)
							fileBitmap = BTranslationUtils::GetBitmap(path.Path());
						else 
							printf("IconButton::SetIcon() - path.Append() failed: %s\n", strerror(status));
					} else
						printf("IconButton::SetIcon() - path.GetParent() failed: %s\n", strerror(status));
				} else
					printf("IconButton::SetIcon() - path.InitCheck() failed: %s\n", strerror(status));
			} else
				printf("IconButton::SetIcon() - be_app->GetAppInfo() failed: %s\n", strerror(status));
		} else
			fileBitmap = BTranslationUtils::GetBitmap(pathToBitmap);
		if (fileBitmap) {
			status = _MakeBitmaps(fileBitmap);
			delete fileBitmap;
		} else
			status = B_ERROR;
	}
	return status;
}

// SetIcon
status_t
IconButton::SetIcon(const BBitmap* bitmap)
{
	if (bitmap && bitmap->ColorSpace() == B_CMAP8) {
		status_t status = bitmap->InitCheck();
		if (status >= B_OK) {
			if (BBitmap* rgb32Bitmap = _ConvertToRGB32(bitmap)) {
				status = _MakeBitmaps(rgb32Bitmap);
				delete rgb32Bitmap;
			} else
				status = B_NO_MEMORY;
		}
		return status;
	} else
		return _MakeBitmaps(bitmap);
}

// SetIcon
status_t
IconButton::SetIcon(const BMimeType* fileType, bool small)
{
	status_t status = fileType ? fileType->InitCheck() : B_BAD_VALUE;
	if (status >= B_OK) {
		BBitmap* mimeBitmap = new(nothrow) BBitmap(BRect(0.0, 0.0, 15.0, 15.0), B_CMAP8);
		if (mimeBitmap && mimeBitmap->IsValid()) {
			status = fileType->GetIcon(mimeBitmap, small ? B_MINI_ICON : B_LARGE_ICON);
			if (status >= B_OK) {
				if (BBitmap* bitmap = _ConvertToRGB32(mimeBitmap)) {
					status = _MakeBitmaps(bitmap);
					delete bitmap;
				} else
					printf("IconButton::SetIcon() - B_RGB32 bitmap is not valid\n");
			} else
				printf("IconButton::SetIcon() - fileType->GetIcon() failed: %s\n", strerror(status));
		} else
			printf("IconButton::SetIcon() - B_CMAP8 bitmap is not valid\n");
		delete mimeBitmap;
	} else
		printf("IconButton::SetIcon() - fileType is not valid: %s\n", strerror(status));
	return status;
}

// SetIcon
status_t
IconButton::SetIcon(const unsigned char* bitsFromQuickRes,
					uint32 width, uint32 height, color_space format, bool convertToBW)
{
	status_t status = B_BAD_VALUE;
	if (bitsFromQuickRes && width > 0 && height > 0) {
		BBitmap* quickResBitmap = new(nothrow) BBitmap(BRect(0.0, 0.0, width - 1.0, height - 1.0), format);
		status = quickResBitmap ? quickResBitmap->InitCheck() : B_ERROR;
		if (status >= B_OK) {
			// It doesn't look right to copy BitsLength() bytes, but bitmaps
			// exported from QuickRes still contain their padding, so it is alright.
			memcpy(quickResBitmap->Bits(), bitsFromQuickRes, quickResBitmap->BitsLength());
			if (format != B_RGB32 && format != B_RGBA32 && format != B_RGB32_BIG && format != B_RGBA32_BIG) {
				// colorspace needs conversion
				BBitmap* bitmap = new(nothrow) BBitmap(quickResBitmap->Bounds(), B_RGB32, true);
				if (bitmap && bitmap->IsValid()) {
					BView* helper = new BView(bitmap->Bounds(), "helper",
											  B_FOLLOW_NONE, B_WILL_DRAW);
					if (bitmap->Lock()) {
						bitmap->AddChild(helper);
						helper->SetHighColor(ui_color(B_PANEL_BACKGROUND_COLOR));
						helper->FillRect(helper->Bounds());
						helper->SetDrawingMode(B_OP_OVER);
						helper->DrawBitmap(quickResBitmap, BPoint(0.0, 0.0));
						helper->Sync();
						bitmap->Unlock();
					}
					status = _MakeBitmaps(bitmap);
				} else
					printf("IconButton::SetIcon() - B_RGB32 bitmap is not valid\n");
				delete bitmap;
			} else {
				// native colorspace (32 bits)
				if (convertToBW) {
					// convert to gray scale icon
					uint8* bits = (uint8*)quickResBitmap->Bits();
					uint32 bpr = quickResBitmap->BytesPerRow();
					for (uint32 y = 0; y < height; y++) {
						uint8* handle = bits;
						uint8 gray;
						for (uint32 x = 0; x < width; x++) {
							gray = uint8((116 * handle[0] + 600 * handle[1] + 308 * handle[2]) / 1024);
							handle[0] = gray;
							handle[1] = gray;
							handle[2] = gray;
							handle += 4;
						}
						bits += bpr;
					}
				}
				status = _MakeBitmaps(quickResBitmap);
			}
		} else
			printf("IconButton::SetIcon() - error allocating bitmap: %s\n", strerror(status));
		delete quickResBitmap;
	}
	return status;
}

// ClearIcon
void
IconButton::ClearIcon()
{
	_DeleteBitmaps();
	_Update();
}

// Bitmap
BBitmap*
IconButton::Bitmap() const
{
	BBitmap* bitmap = NULL;
	if (fNormalBitmap && fNormalBitmap->IsValid()) {
		bitmap = new(nothrow) BBitmap(fNormalBitmap);
		if (bitmap->IsValid()) {
			// TODO: remove this functionality when we use real transparent bitmaps
			uint8* bits = (uint8*)bitmap->Bits();
			uint32 bpr = bitmap->BytesPerRow();
			uint32 width = bitmap->Bounds().IntegerWidth() + 1;
			uint32 height = bitmap->Bounds().IntegerHeight() + 1;
			color_space format = bitmap->ColorSpace();
			if (format == B_CMAP8) {
				// replace gray with magic transparent index
			} else if (format == B_RGB32) {
				for (uint32 y = 0; y < height; y++) {
					uint8* bitsHandle = bits;
					for (uint32 x = 0; x < width; x++) {
						if (bitsHandle[0] == 216
							&& bitsHandle[1] == 216
							&& bitsHandle[2] == 216) {
							bitsHandle[3] = 0;	// make this pixel completely transparent
						}
						bitsHandle += 4;
					}
					bits += bpr;
				}
			}
		} else {
			delete bitmap;
			bitmap = NULL;
		}
	}
	return bitmap;
}

// DrawBorder
bool
IconButton::DrawBorder() const
{
	return (IsEnabled() && (_HasFlags(STATE_INSIDE) || _HasFlags(STATE_TRACKING))
			|| _HasFlags(STATE_FORCE_PRESSED));
}

// DrawNormalBorder
void
IconButton::DrawNormalBorder(BRect r, rgb_color background,
							 rgb_color shadow, rgb_color darkShadow,
							 rgb_color lightShadow, rgb_color light)
{
	_DrawFrame(r, shadow, darkShadow, light, lightShadow);
}

// DrawPressedBorder
void
IconButton::DrawPressedBorder(BRect r, rgb_color background,
							rgb_color shadow, rgb_color darkShadow,
							rgb_color lightShadow, rgb_color light)
{
	_DrawFrame(r, shadow, light, darkShadow, background);
}

// IsValid
bool
IconButton::IsValid() const
{
	return (fNormalBitmap && fDisabledBitmap && fClickedBitmap && fDisabledClickedBitmap
		&& fNormalBitmap->IsValid()
		&& fDisabledBitmap->IsValid()
		&& fClickedBitmap->IsValid()
		&& fDisabledClickedBitmap->IsValid());
}

// Value
int32
IconButton::Value() const
{
	return _HasFlags(STATE_PRESSED) ? B_CONTROL_ON : B_CONTROL_OFF;
}

// SetValue
void
IconButton::SetValue(int32 value)
{
	if (value)
		_AddFlags(STATE_PRESSED);
	else
		_ClearFlags(STATE_PRESSED);
}

// IsEnabled
bool
IconButton::IsEnabled() const
{
	return _HasFlags(STATE_ENABLED) ? B_CONTROL_ON : B_CONTROL_OFF;
}

// SetEnabled
void
IconButton::SetEnabled(bool enabled)
{
	if (enabled)
		_AddFlags(STATE_ENABLED);
	else
		_ClearFlags(STATE_ENABLED | STATE_TRACKING | STATE_INSIDE);
}

// _ConvertToRGB32
BBitmap*
IconButton::_ConvertToRGB32(const BBitmap* bitmap) const
{
	BBitmap* convertedBitmap = new(nothrow) BBitmap(bitmap->Bounds(), B_BITMAP_ACCEPTS_VIEWS, B_RGBA32);
	if (convertedBitmap && convertedBitmap->IsValid()) {
		memset(convertedBitmap->Bits(), 0, convertedBitmap->BitsLength());
		BView* helper = new BView(bitmap->Bounds(), "helper",
								  B_FOLLOW_NONE, B_WILL_DRAW);
		if (convertedBitmap->Lock()) {
			convertedBitmap->AddChild(helper);
			helper->SetDrawingMode(B_OP_OVER);
			helper->DrawBitmap(bitmap, BPoint(0.0, 0.0));
			helper->Sync();
			convertedBitmap->Unlock();
		}
	} else {
		delete convertedBitmap;
		convertedBitmap = NULL;
	}
	return convertedBitmap;
}

// _MakeBitmaps
status_t
IconButton::_MakeBitmaps(const BBitmap* bitmap)
{
	status_t status = bitmap ? bitmap->InitCheck() : B_BAD_VALUE;
	if (status >= B_OK) {
		// make our own versions of the bitmap
		BRect b(bitmap->Bounds());
		_DeleteBitmaps();
		color_space format = bitmap->ColorSpace();
		fNormalBitmap = new(nothrow) BBitmap(b, format);
		fDisabledBitmap = new(nothrow) BBitmap(b, format);
		fClickedBitmap = new(nothrow) BBitmap(b, format);
		fDisabledClickedBitmap = new(nothrow) BBitmap(b, format);
		if (IsValid()) {
			// copy bitmaps from file bitmap
			uint8* nBits = (uint8*)fNormalBitmap->Bits();
			uint8* dBits = (uint8*)fDisabledBitmap->Bits();
			uint8* cBits = (uint8*)fClickedBitmap->Bits();
			uint8* dcBits = (uint8*)fDisabledClickedBitmap->Bits();
			uint8* fBits = (uint8*)bitmap->Bits();
			int32 nbpr = fNormalBitmap->BytesPerRow();
			int32 fbpr = bitmap->BytesPerRow();
			int32 pixels = b.IntegerWidth() + 1;
			int32 lines = b.IntegerHeight() + 1;
			// nontransparent version:
			if (format == B_RGB32 || format == B_RGB32_BIG) {
				// iterate over color components
				for (int32 y = 0; y < lines; y++) {
					for (int32 x = 0; x < pixels; x++) {
						int32 nOffset = 4 * x;
						int32 fOffset = 4 * x;
						nBits[nOffset + 0] = fBits[fOffset + 0];
						nBits[nOffset + 1] = fBits[fOffset + 1];
						nBits[nOffset + 2] = fBits[fOffset + 2];
						nBits[nOffset + 3] = 255;
						// clicked bits are darker (lame method...)
						cBits[nOffset + 0] = (uint8)((float)nBits[nOffset + 0] * 0.8);
						cBits[nOffset + 1] = (uint8)((float)nBits[nOffset + 1] * 0.8);
						cBits[nOffset + 2] = (uint8)((float)nBits[nOffset + 2] * 0.8);
						cBits[nOffset + 3] = 255;
						// disabled bits have less contrast (lame method...)
						uint8 grey = 216;
						float dist = (nBits[nOffset + 0] - grey) * 0.4;
						dBits[nOffset + 0] = (uint8)(grey + dist);
						dist = (nBits[nOffset + 1] - grey) * 0.4;
						dBits[nOffset + 1] = (uint8)(grey + dist);
						dist = (nBits[nOffset + 2] - grey) * 0.4;
						dBits[nOffset + 2] = (uint8)(grey + dist);
						dBits[nOffset + 3] = 255;
						// disabled bits have less contrast (lame method...)
						grey = 188;
						dist = (nBits[nOffset + 0] - grey) * 0.4;
						dcBits[nOffset + 0] = (uint8)(grey + dist);
						dist = (nBits[nOffset + 1] - grey) * 0.4;
						dcBits[nOffset + 1] = (uint8)(grey + dist);
						dist = (nBits[nOffset + 2] - grey) * 0.4;
						dcBits[nOffset + 2] = (uint8)(grey + dist);
						dcBits[nOffset + 3] = 255;
					}
					nBits += nbpr;
					dBits += nbpr;
					cBits += nbpr;
					dcBits += nbpr;
					fBits += fbpr;
				}
			// transparent version:
			} else if (format == B_RGBA32 || format == B_RGBA32_BIG) {
				// iterate over color components
				for (int32 y = 0; y < lines; y++) {
					for (int32 x = 0; x < pixels; x++) {
						int32 nOffset = 4 * x;
						int32 fOffset = 4 * x;
						nBits[nOffset + 0] = fBits[fOffset + 0];
						nBits[nOffset + 1] = fBits[fOffset + 1];
						nBits[nOffset + 2] = fBits[fOffset + 2];
						nBits[nOffset + 3] = fBits[fOffset + 3];
						// clicked bits are darker (lame method...)
						cBits[nOffset + 0] = (uint8)(nBits[nOffset + 0] * 0.8);
						cBits[nOffset + 1] = (uint8)(nBits[nOffset + 1] * 0.8);
						cBits[nOffset + 2] = (uint8)(nBits[nOffset + 2] * 0.8);
						cBits[nOffset + 3] = fBits[fOffset + 3];
						// disabled bits have less opacity
						dBits[nOffset + 0] = fBits[fOffset + 0];
						dBits[nOffset + 1] = fBits[fOffset + 1];
						dBits[nOffset + 2] = fBits[fOffset + 2];
						dBits[nOffset + 3] = (uint8)(fBits[fOffset + 3] * 0.5);
						// disabled bits have less contrast (lame method...)
						dcBits[nOffset + 0] = (uint8)(nBits[nOffset + 0] * 0.8);
						dcBits[nOffset + 1] = (uint8)(nBits[nOffset + 1] * 0.8);
						dcBits[nOffset + 2] = (uint8)(nBits[nOffset + 2] * 0.8);
						dcBits[nOffset + 3] = (uint8)(fBits[fOffset + 3] * 0.5);
					}
					nBits += nbpr;
					dBits += nbpr;
					cBits += nbpr;
					dcBits += nbpr;
					fBits += fbpr;
				}
			// unsupported format
			} else {
				printf("IconButton::_MakeBitmaps() - bitmap has unsupported colorspace\n");
				status = B_MISMATCHED_VALUES;
				_DeleteBitmaps();
			}
		} else {
			printf("IconButton::_MakeBitmaps() - error allocating local bitmaps\n");
			status = B_NO_MEMORY;
			_DeleteBitmaps();
		}
	} else
		printf("IconButton::_MakeBitmaps() - bitmap is not valid\n");
	return status;
}

// _DeleteBitmaps
void
IconButton::_DeleteBitmaps()
{
	delete fNormalBitmap;
	fNormalBitmap = NULL;
	delete fDisabledBitmap;
	fDisabledBitmap = NULL;
	delete fClickedBitmap;
	fClickedBitmap = NULL;
	delete fDisabledClickedBitmap;
	fDisabledClickedBitmap = NULL;
}

// _Update
void
IconButton::_Update()
{
	if (LockLooper()) {
		Invalidate();
		UnlockLooper();
	}
}

// _AddFlags
void
IconButton::_AddFlags(uint32 flags)
{
	if (!(fButtonState & flags)) {
		fButtonState |= flags;
		_Update();
	}
}

// _ClearFlags
void
IconButton::_ClearFlags(uint32 flags)
{
	if (fButtonState & flags) {
		fButtonState &= ~flags;
		_Update();
	}
}

// _HasFlags
bool
IconButton::_HasFlags(uint32 flags) const
{
	return (fButtonState & flags);
}

// _DrawFrame
void
IconButton::_DrawFrame(BRect r, rgb_color col1, rgb_color col2,
					   rgb_color col3, rgb_color col4)
{
	BeginLineArray(8);
		AddLine(BPoint(r.left, r.bottom), BPoint(r.left, r.top), col1);
		AddLine(BPoint(r.left + 1.0, r.top), BPoint(r.right, r.top), col1);
		AddLine(BPoint(r.right, r.top + 1.0), BPoint(r.right, r.bottom), col2);
		AddLine(BPoint(r.right - 1.0, r.bottom), BPoint(r.left + 1.0, r.bottom), col2);
		r.InsetBy(1.0, 1.0);
		AddLine(BPoint(r.left, r.bottom), BPoint(r.left, r.top), col3);
		AddLine(BPoint(r.left + 1.0, r.top), BPoint(r.right, r.top), col3);
		AddLine(BPoint(r.right, r.top + 1.0), BPoint(r.right, r.bottom), col4);
		AddLine(BPoint(r.right - 1.0, r.bottom), BPoint(r.left + 1.0, r.bottom), col4);
	EndLineArray();
}