apps/deskbar/ExpandoMenuBar.cpp

/*
Open Tracker License

Terms and Conditions

Copyright (c) 1991-2000, Be Incorporated. All rights reserved.

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:

The above copyright notice and this permission notice applies to all licensees
and shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF TITLE, MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
BE INCORPORATED BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF, OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of Be Incorporated shall not be
used in advertising or otherwise to promote the sale, use or other dealings in
this Software without prior written authorization from Be Incorporated.

Tracker(TM), Be(R), BeOS(R), and BeIA(TM) are trademarks or registered
trademarks of Be Incorporated in the United States and other countries. Other
brand product names are registered trademarks or trademarks of their respective
holders.
All rights reserved.
*/


#include "ExpandoMenuBar.h"

#include <strings.h>

#include <map>

#include <Autolock.h>
#include <Bitmap.h>
#include <Collator.h>
#include <ControlLook.h>
#include <Debug.h>
#include <MenuPrivate.h>
#include <MessengerPrivate.h>
#include <NodeInfo.h>
#include <Roster.h>
#include <Screen.h>
#include <Thread.h>
#include <Window.h>

#include "icons.h"

#include "BarApp.h"
#include "BarMenuTitle.h"
#include "BarView.h"
#include "BarWindow.h"
#include "DeskbarMenu.h"
#include "DeskbarUtils.h"
#include "InlineScrollView.h"
#include "ResourceSet.h"
#include "ShowHideMenuItem.h"
#include "StatusView.h"
#include "TeamMenu.h"
#include "TeamMenuItem.h"
#include "WindowMenu.h"
#include "WindowMenuItem.h"


const float kIconPadding = 8.0f;
const float kDeskbarMenuWidth = gMinimumWindowWidth / 2 + kIconPadding;

const uint32 kMinimizeTeam = 'mntm';
const uint32 kBringTeamToFront = 'bftm';

bool TExpandoMenuBar::sDoMonitor = false;
thread_id TExpandoMenuBar::sMonThread = B_ERROR;
BLocker TExpandoMenuBar::sMonLocker("expando monitor");

typedef std::map<BString, TTeamMenuItem*> TeamMenuItemMap;


//	#pragma mark - TExpandoMenuBar


TExpandoMenuBar::TExpandoMenuBar(menu_layout layout, TBarView* barView)
	:
	BMenuBar(BRect(0, 0, 0, 0), "ExpandoMenuBar", B_FOLLOW_NONE, layout),
	fBarView(barView),
	fOverflow(false),
	fUnderflow(false),
	fFirstBuild(true),
	fPreviousDragTargetItem(NULL),
	fLastMousedOverItem(NULL),
	fLastClickedItem(NULL),
	fLastClickTime(0)
{
	SetItemMargins(0.0f, 0.0f, 0.0f, 0.0f);
	SetFont(be_plain_font);
}


void
TExpandoMenuBar::AllAttached()
{
	BMenuBar::AllAttached();

	SizeWindow(0);
}


void
TExpandoMenuBar::AttachedToWindow()
{
	BMenuBar::AttachedToWindow();

	fTeamList.MakeEmpty();

	if (Vertical())
		StartMonitoringWindows();
}


void
TExpandoMenuBar::DetachedFromWindow()
{
	BMenuBar::DetachedFromWindow();

	StopMonitoringWindows();

	BMessenger self(this);
	BMessage message(kUnsubscribe);
	message.AddMessenger("messenger", self);
	be_app->PostMessage(&message);

	RemoveItems(0, CountItems(), true);
}


void
TExpandoMenuBar::MessageReceived(BMessage* message)
{
	int32 index;
	TTeamMenuItem* item;

	switch (message->what) {
		case B_SOME_APP_LAUNCHED:
		{
			BList* teams = NULL;
			message->FindPointer("teams", (void**)&teams);

			BBitmap* icon = NULL;
			message->FindPointer("icon", (void**)&icon);

			const char* signature = NULL;
			message->FindString("sig", &signature);

			uint32 flags = 0;
			message->FindInt32("flags", ((int32*) &flags));

			const char* name = NULL;
			message->FindString("name", &name);

			AddTeam(teams, icon, strdup(name), strdup(signature));
			break;
		}

		case B_MOUSE_WHEEL_CHANGED:
		{
			float deltaY = 0;
			message->FindFloat("be:wheel_delta_y", &deltaY);
			if (deltaY == 0)
				return;

			TInlineScrollView* scrollView
				= dynamic_cast<TInlineScrollView*>(Parent());
			if (scrollView == NULL || !scrollView->HasScrollers())
				return;

			float largeStep;
			float smallStep;
			scrollView->GetSteps(&smallStep, &largeStep);

			// pressing the option/command/control key scrolls faster
			if (modifiers() & (B_OPTION_KEY | B_COMMAND_KEY | B_CONTROL_KEY))
				deltaY *= largeStep;
			else
				deltaY *= smallStep;

			scrollView->ScrollBy(deltaY);
			break;
		}

		case kAddTeam:
			AddTeam(message->FindInt32("team"), message->FindString("sig"));
			break;

		case kRemoveTeam:
		{
			team_id team = -1;
			message->FindInt32("team", &team);

			RemoveTeam(team, true);
			break;
		}

		case B_SOME_APP_QUIT:
		{
			team_id team = -1;
			message->FindInt32("team", &team);

			RemoveTeam(team, false);
			break;
		}

		case kMinimizeTeam:
		{
			index = message->FindInt32("itemIndex");
			item = dynamic_cast<TTeamMenuItem*>(ItemAt(index));
			if (item == NULL)
				break;

			TShowHideMenuItem::TeamShowHideCommon(B_MINIMIZE_WINDOW,
				item->Teams(),
				item->Menu()->ConvertToScreen(item->Frame()),
				true);
			break;
		}

		case kBringTeamToFront:
		{
			index = message->FindInt32("itemIndex");
			item = dynamic_cast<TTeamMenuItem*>(ItemAt(index));
			if (item == NULL)
				break;

			TShowHideMenuItem::TeamShowHideCommon(B_BRING_TO_FRONT,
				item->Teams(), item->Menu()->ConvertToScreen(item->Frame()),
				true);
			break;
		}

		default:
			BMenuBar::MessageReceived(message);
			break;
	}
}


void
TExpandoMenuBar::MouseDown(BPoint where)
{
	BMessage* message = Window()->CurrentMessage();
	BMenuItem* menuItem;
	TTeamMenuItem* item = TeamItemAtPoint(where, &menuItem);
	fLastClickedItem = item;

	if (message == NULL || item == NULL || fBarView == NULL
		|| fBarView->Dragging()) {
		BMenuBar::MouseDown(where);
		return;
	}

	int32 modifiers = 0;
	int32 buttons = 0;
	message->FindInt32("modifiers", &modifiers);
	message->FindInt32("buttons", &buttons);

	// check for three finger salute, a.k.a. Vulcan Death Grip
	if ((modifiers & B_COMMAND_KEY) != 0
		&& (modifiers & B_CONTROL_KEY) != 0
		&& (modifiers & B_SHIFT_KEY) != 0) {
		const BList* teams = item->Teams();
		int32 teamCount = teams->CountItems();
		team_id teamID;
		for (int32 team = 0; team < teamCount; team++) {
			teamID = (addr_t)teams->ItemAt(team);
			kill_team(teamID);
			RemoveTeam(teamID, false);
				// remove the team from display immediately
		}
		return;
			// absorb the message
	} else if (item != NULL
		&& (modifiers & B_SHIFT_KEY) == 0
		&& (buttons & B_TERTIARY_MOUSE_BUTTON) != 0) {
		be_roster->Launch(item->Signature());
		return;
			// absorb the message
	} else {
		TWindowMenuItem* wndItem = dynamic_cast<TWindowMenuItem*>(menuItem);
		if (wndItem != NULL
			&& (modifiers & B_SHIFT_KEY) != 0
			&& (buttons & B_TERTIARY_MOUSE_BUTTON) != 0) {
			// close window
			client_window_info* info;
			BMessenger wnd;
			info = get_window_info(wndItem->ID());
			if (info == NULL) return;
			BMessenger::Private(wnd).SetTo(
				info->team, info->client_port, info->client_token);
			free(info); info = NULL;
			wnd.SendMessage(B_QUIT_REQUESTED);
			return;
				// absorb the message
		}
	}

	// control click - show all/hide all shortcut
	if ((modifiers & B_CONTROL_KEY) != 0) {
		// show/hide item's teams
		BMessage showMessage((modifiers & B_SHIFT_KEY) != 0
			? kMinimizeTeam : kBringTeamToFront);
		showMessage.AddInt32("itemIndex", IndexOf(item));
		Window()->PostMessage(&showMessage, this);
		return;
			// absorb the message
	}

	// check if within expander bounds to expand window items
	if (Vertical() && static_cast<TBarApp*>(be_app)->Settings()->superExpando
		&& item->ExpanderBounds().Contains(where)) {
		// start the animation here, finish on mouse up
		item->SetArrowDirection(BControlLook::B_RIGHT_DOWN_ARROW);
		SetMouseEventMask(B_POINTER_EVENTS, B_NO_POINTER_HISTORY);
		Invalidate(item->ExpanderBounds());
		return;
			// absorb the message
	}

	// double-click on an item brings the team to front
	int32 clicks;
	bigtime_t clickSpeed = 0;
	get_click_speed(&clickSpeed);
	bigtime_t delta = system_time() - fLastClickTime;
	if (message->FindInt32("clicks", &clicks) == B_OK && clicks > 1
		&& item == menuItem && item == fLastClickedItem
		&& delta <= clickSpeed) {
		be_roster->ActivateApp((addr_t)item->Teams()->ItemAt(0));
			// activate this team
		return;
			// absorb the message
	}

	// Update fLastClickTime only if we are not already triggering the
	// double-click action. Otherwise the delay is renewed at every subsequent
	// click and they keep triggering the double click action
	fLastClickTime = system_time();

	BMenuBar::MouseDown(where);
}


void
TExpandoMenuBar::MouseMoved(BPoint where, uint32 code, const BMessage* message)
{
	int32 buttons;
	BMessage* currentMessage = Window()->CurrentMessage();
	if (currentMessage == NULL
		|| currentMessage->FindInt32("buttons", &buttons) != B_OK) {
		buttons = 0;
	}

	if (message == NULL) {
		// force a cleanup
		_FinishedDrag();

		if (Vertical() && buttons != 0
				&& static_cast<TBarApp*>(be_app)->Settings()->superExpando) {
			TTeamMenuItem* lastItem
				= dynamic_cast<TTeamMenuItem*>(fLastClickedItem);
			if (lastItem != NULL) {
				if (lastItem->ExpanderBounds().Contains(where))
					lastItem->SetArrowDirection(
						BControlLook::B_RIGHT_DOWN_ARROW);
				else {
					lastItem->SetArrowDirection(lastItem->IsExpanded()
						? BControlLook::B_DOWN_ARROW
						: BControlLook::B_RIGHT_ARROW);
				}

				Invalidate(lastItem->ExpanderBounds());
			}
		}

		switch (code) {
			case B_INSIDE_VIEW:
			{
				BMenuItem* menuItem;
				TTeamMenuItem* item = TeamItemAtPoint(where, &menuItem);

				if (item == NULL || menuItem == NULL) {
					// item is NULL, remove the tooltip and break out
					fLastMousedOverItem = NULL;
					SetToolTip((const char*)NULL);
					break;
				}

				if (menuItem == fLastMousedOverItem) {
					// already set the tooltip for this item, break out
					break;
				}

				TWindowMenuItem* windowMenuItem
					= dynamic_cast<TWindowMenuItem*>(menuItem);
				if (windowMenuItem != NULL && fBarView != NULL && Vertical()
					&& fBarView->ExpandoState() && item->IsExpanded()) {
					// expando mode window menu item
					fLastMousedOverItem = menuItem;
					if (strcasecmp(windowMenuItem->TruncatedLabel(),
							windowMenuItem->Label()) > 0) {
						// label is truncated, set tooltip
						SetToolTip(windowMenuItem->Label());
					} else
						SetToolTip((const char*)NULL);

					break;
				}

				if (!dynamic_cast<TBarApp*>(be_app)->Settings()->hideLabels) {
					// item has a visible label, set tool tip if truncated
					fLastMousedOverItem = menuItem;
					if (strcasecmp(item->TruncatedLabel(), item->Label()) > 0) {
						// label is truncated, set tooltip
						SetToolTip(item->Label());
					} else
						SetToolTip((const char*)NULL);

					break;
				}

				SetToolTip(item->Label());
					// new item, set the tooltip to the item label
				fLastMousedOverItem = menuItem;
					// save the current menuitem for the next MouseMoved() call
				break;
			}
		}

		BMenuBar::MouseMoved(where, code, message);
		return;
	}

	if (buttons == 0)
		return;

	switch (code) {
		case B_ENTERED_VIEW:
			// fPreviousDragTargetItem should always be NULL here anyways.
			if (fPreviousDragTargetItem != NULL)
				_FinishedDrag();

			fBarView->CacheDragData(message);
			fPreviousDragTargetItem = NULL;
			break;

		case B_OUTSIDE_VIEW:
			// NOTE: Should not be here, but for the sake of defensive
			// programming... fall-through
		case B_EXITED_VIEW:
			_FinishedDrag();
			break;

		case B_INSIDE_VIEW:
			if (fBarView != NULL && fBarView->Dragging()) {
				TTeamMenuItem* item = NULL;
				int32 itemCount = CountItems();
				for (int32 i = 0; i < itemCount; i++) {
					BMenuItem* _item = ItemAt(i);
					if (_item->Frame().Contains(where)) {
						item = dynamic_cast<TTeamMenuItem*>(_item);
						break;
					}
				}
				if (item == fPreviousDragTargetItem)
					break;
				if (fPreviousDragTargetItem != NULL)
					fPreviousDragTargetItem->SetOverrideSelected(false);
				if (item != NULL)
					item->SetOverrideSelected(true);
				fPreviousDragTargetItem = item;
			}
			break;
	}
}


void
TExpandoMenuBar::MouseUp(BPoint where)
{
	TTeamMenuItem* lastItem = dynamic_cast<TTeamMenuItem*>(fLastClickedItem);
	fLastClickedItem = NULL;

	if (fBarView != NULL && fBarView->Dragging()) {
		_FinishedDrag(true);
		return;
			// absorb the message
	}

	if (Vertical() && static_cast<TBarApp*>(be_app)->Settings()->superExpando
		&& lastItem != NULL && lastItem->ExpanderBounds().Contains(where)) {
		lastItem->ToggleExpandState(true);
		lastItem->SetArrowDirection(lastItem->IsExpanded()
			? BControlLook::B_DOWN_ARROW
			: BControlLook::B_RIGHT_ARROW);

		Invalidate(lastItem->ExpanderBounds());
	}
	BMenuBar::MouseUp(where);
}


void
TExpandoMenuBar::BuildItems()
{
	BMessenger self(this);
	TBarApp::Subscribe(self, &fTeamList);

	desk_settings* settings = static_cast<TBarApp*>(be_app)->Settings();

	float itemWidth = -1.0f;
	if (Vertical() && (fBarView->ExpandoState() || fBarView->FullState())) {
		itemWidth = settings->width;
	}
	SetMaxContentWidth(itemWidth);

	TeamMenuItemMap items;
	int32 itemCount = CountItems();
	BList itemList(itemCount);
	for (int32 i = 0; i < itemCount; i++) {
		BMenuItem* menuItem = RemoveItem((int32)0);
		itemList.AddItem(menuItem);
		TTeamMenuItem* item = dynamic_cast<TTeamMenuItem*>(menuItem);
		if (item != NULL)
			items[BString(item->Signature()).ToLower()] = item;
	}

	if (settings->sortRunningApps)
		fTeamList.SortItems(TTeamMenu::CompareByName);

	int32 teamCount = fTeamList.CountItems();
	for (int32 i = 0; i < teamCount; i++) {
		BarTeamInfo* barInfo = (BarTeamInfo*)fTeamList.ItemAt(i);
		TeamMenuItemMap::const_iterator iter
			= items.find(BString(barInfo->sig).ToLower());
		if (iter == items.end()) {
			// new team
			TTeamMenuItem* item = new TTeamMenuItem(barInfo->teams,
				barInfo->icon, barInfo->name, barInfo->sig, itemWidth);

			if (settings->trackerAlwaysFirst
				&& strcasecmp(barInfo->sig, kTrackerSignature) == 0) {
				AddItem(item, 0);
			} else
				AddItem(item);

			if (fFirstBuild && Vertical() && settings->expandNewTeams)
				item->ToggleExpandState(true);
		} else {
			// existing team, update info and add it
			TTeamMenuItem* item = iter->second;
			item->SetIcon(barInfo->icon);
			item->SetOverrideWidth(itemWidth);

			if (settings->trackerAlwaysFirst
				&& strcasecmp(barInfo->sig, kTrackerSignature) == 0) {
				AddItem(item, 0);
			} else
				AddItem(item);

			// add window items back
			int32 index = itemList.IndexOf(item);
			TWindowMenuItem* windowItem;
			TWindowMenu* submenu = dynamic_cast<TWindowMenu*>(item->Submenu());
			bool hasWindowItems = false;
			while ((windowItem = dynamic_cast<TWindowMenuItem*>(
					(BMenuItem*)(itemList.ItemAt(++index)))) != NULL) {
				if (Vertical())
					AddItem(windowItem);
				else {
					delete windowItem;
					hasWindowItems = submenu != NULL;
				}
			}

			// unexpand if turn off show team expander
			if (Vertical() && !settings->superExpando && item->IsExpanded())
				item->ToggleExpandState(false);

			if (hasWindowItems) {
				// add (new) window items in submenu
				submenu->SetExpanded(false, 0);
				submenu->AttachedToWindow();
			}
		}
	}

	if (CountItems() == 0) {
		// If we're empty, BMenuBar::AttachedToWindow() resizes us to some
		// weird value - we just override it again
		ResizeTo(gMinimumWindowWidth, 0);
	} else {
		// first build isn't complete until we've gotten here with an item
		fFirstBuild = false;
	}
}


bool
TExpandoMenuBar::InDeskbarMenu(BPoint loc) const
{
	TBarWindow* window = dynamic_cast<TBarWindow*>(Window());
	if (window != NULL) {
		if (TDeskbarMenu* bemenu = window->DeskbarMenu()) {
			bool inDeskbarMenu = false;
			if (bemenu->LockLooper()) {
				inDeskbarMenu = bemenu->Frame().Contains(loc);
				bemenu->UnlockLooper();
			}
			return inDeskbarMenu;
		}
	}

	return false;
}


/*!	Returns the team menu item that belongs to the item under the
	specified \a point.
	If \a _item is given, it will return the exact menu item under
	that point (which might be a window item when the expander is on).
*/
TTeamMenuItem*
TExpandoMenuBar::TeamItemAtPoint(BPoint point, BMenuItem** _item)
{
	TTeamMenuItem* lastApp = NULL;
	int32 itemCount = CountItems();

	for (int32 i = 0; i < itemCount; i++) {
		BMenuItem* item = ItemAt(i);

		if (dynamic_cast<TTeamMenuItem*>(item) != NULL)
			lastApp = (TTeamMenuItem*)item;

		if (item && item->Frame().Contains(point)) {
			if (_item != NULL)
				*_item = item;

			return lastApp;
		}
	}

	// no item found

	if (_item != NULL)
		*_item = NULL;

	return NULL;
}


void
TExpandoMenuBar::AddTeam(BList* team, BBitmap* icon, char* name,
	char* signature)
{
	TTeamMenuItem* item = new TTeamMenuItem(team, icon, name, signature);

	desk_settings* settings = static_cast<TBarApp*>(be_app)->Settings();
	if (settings != NULL && settings->trackerAlwaysFirst
		&& strcasecmp(signature, kTrackerSignature) == 0) {
		AddItem(item, 0);
	} else if (settings->sortRunningApps) {
		TTeamMenuItem* teamItem = dynamic_cast<TTeamMenuItem*>(ItemAt(0));
		int32 firstApp = 0;

		// if Tracker should always be the first item, we need to skip it
		// when sorting in the current item
		if (settings->trackerAlwaysFirst && teamItem != NULL
			&& strcasecmp(teamItem->Signature(), kTrackerSignature) == 0) {
			firstApp++;
		}

		BCollator collator;
		BLocale::Default()->GetCollator(&collator);

		int32 i = firstApp;
		int32 itemCount = CountItems();
		while (i < itemCount) {
			teamItem = dynamic_cast<TTeamMenuItem*>(ItemAt(i));
			if (teamItem != NULL && collator.Compare(teamItem->Label(), name)
					> 0) {
				AddItem(item, i);
				break;
			}
			i++;
		}
		// was the item added to the list yet?
		if (i == itemCount)
			AddItem(item);
	} else
		AddItem(item);

	if (Vertical() && settings != NULL && settings->superExpando
		&& settings->expandNewTeams) {
		item->ToggleExpandState(false);
	}

	SizeWindow(1);
	Window()->UpdateIfNeeded();
}


void
TExpandoMenuBar::AddTeam(team_id team, const char* signature)
{
	int32 itemCount = CountItems();
	for (int32 i = 0; i < itemCount; i++) {
		// Only add to team menu items
		TTeamMenuItem* item = dynamic_cast<TTeamMenuItem*>(ItemAt(i));
		if (item != NULL && strcasecmp(item->Signature(), signature) == 0
			&& !(item->Teams()->HasItem((void*)(addr_t)team))) {
			item->Teams()->AddItem((void*)(addr_t)team);
			break;
		}
	}
}


void
TExpandoMenuBar::RemoveTeam(team_id team, bool partial)
{
	TWindowMenuItem* windowItem = NULL;

	for (int32 i = CountItems() - 1; i >= 0; i--) {
		TTeamMenuItem* item = dynamic_cast<TTeamMenuItem*>(ItemAt(i));
		if (item != NULL && item->Teams()->HasItem((void*)(addr_t)team)) {
			item->Teams()->RemoveItem(team);
			if (partial)
				return;

			BAutolock locker(sMonLocker);
				// make the update thread wait
			RemoveItem(i);
			if (item == fPreviousDragTargetItem)
				fPreviousDragTargetItem = NULL;

			if (item == fLastMousedOverItem)
				fLastMousedOverItem = NULL;

			if (item == fLastClickedItem)
				fLastClickedItem = NULL;

			delete item;
			while ((windowItem = dynamic_cast<TWindowMenuItem*>(
					ItemAt(i))) != NULL) {
				// Also remove window items (if there are any)
				RemoveItem(i);
				if (windowItem == fLastMousedOverItem)
					fLastMousedOverItem = NULL;

				if (windowItem == fLastClickedItem)
					fLastClickedItem = NULL;

				delete windowItem;
			}
			SizeWindow(-1);
			Window()->UpdateIfNeeded();
			return;
		}
	}
}


void
TExpandoMenuBar::CheckItemSizes(int32 delta, bool reset)
{
	// horizontal only
	if (fBarView == NULL || Vertical())
		return;

	// minimum two items before size overrun can occur
	int32 itemCount = CountItems();
	if (itemCount < 2)
		return;

	float minItemWidth = MinHorizontalItemWidth();
	float maxItemWidth = MaxHorizontalItemWidth();
	float maxMenuWidth = maxItemWidth * itemCount;
	float maxWidth = MaxHorizontalWidth();
	bool tooWide = maxMenuWidth > maxWidth;

	// start at max width
	float newItemWidth = maxItemWidth;

	if (delta < 0 && fOverflow) {
		// removing an item, check if menu is still too wide
		if (tooWide)
			newItemWidth = floorf(maxWidth / itemCount);
		else
			newItemWidth = maxItemWidth;
	} else if (tooWide) {
		fOverflow = true;
		newItemWidth = std::min(floorf(maxWidth / itemCount), maxItemWidth);
	}

	// see if we should grow items
	fUnderflow = delta < 0 && newItemWidth < maxItemWidth;

	if (fOverflow || fUnderflow || fFirstBuild || reset) {
		// clip within limits
		if (newItemWidth > maxItemWidth)
			newItemWidth = maxItemWidth;
		else if (newItemWidth < minItemWidth)
			newItemWidth = minItemWidth;

		SetMaxContentWidth(newItemWidth);
		if (newItemWidth == maxItemWidth)
			fOverflow = false;

		for (int32 index = 0; ; index++) {
			TTeamMenuItem* item = (TTeamMenuItem*)ItemAt(index);
			if (item == NULL)
				break;

			item->SetOverrideWidth(newItemWidth);
		}

		InvalidateLayout();

		ResizeTo(newItemWidth * itemCount, Frame().Height());
	}
}


float
TExpandoMenuBar::MinHorizontalItemWidth()
{
	int32 iconSize = static_cast<TBarApp*>(be_app)->IconSize();
	float iconOnlyWidth = iconSize + kIconPadding;

	return static_cast<TBarApp*>(be_app)->Settings()->hideLabels
		? iconOnlyWidth
		: (iconSize - kMinimumIconSize) + gMinimumWindowWidth
			+ (be_plain_font->Size() - 12) * 4;
}


float
TExpandoMenuBar::MaxHorizontalItemWidth()
{
	int32 iconSize = static_cast<TBarApp*>(be_app)->IconSize();
	float iconOnlyWidth = iconSize + kIconPadding;

	// hide labels
	if (static_cast<TBarApp*>(be_app)->Settings()->hideLabels)
		return iconOnlyWidth + kIconPadding; // add an extra icon padding

	// set max item width to 1.25x min item width
	return floorf(MinHorizontalItemWidth() * 1.25);
}


menu_layout
TExpandoMenuBar::MenuLayout() const
{
	return Layout();
}


void
TExpandoMenuBar::SetMenuLayout(menu_layout layout)
{
	BPrivate::MenuPrivate(this).SetLayout(layout);
	InvalidateLayout();
}


void
TExpandoMenuBar::Draw(BRect updateRect)
{
	BMenu::Draw(updateRect);
}


void
TExpandoMenuBar::DrawBackground(BRect updateRect)
{
	if (Vertical())
		return;

	SetHighColor(tint_color(ui_color(B_MENU_BACKGROUND_COLOR), 1.22));
	StrokeLine(Bounds().RightTop(), Bounds().RightBottom());
}


/*!	Some methods to help determine if we are showing too many apps
	and need to add or remove in scroll arrows.
*/
bool
TExpandoMenuBar::CheckForSizeOverrun()
{
	if (Vertical())
		return CheckForSizeOverrunVertical();
	else
		return CheckForSizeOverrunHorizontal();
}


bool
TExpandoMenuBar::CheckForSizeOverrunVertical()
{
	if (Window() == NULL || !Vertical())
		return false;

	return Window()->Frame().bottom > (BScreen(Window())).Frame().bottom;

}


bool
TExpandoMenuBar::CheckForSizeOverrunHorizontal()
{
	if (fBarView == NULL || Vertical())
		return false;

	// minimum two items before size overrun can occur
	int32 itemCount = CountItems();
	if (itemCount < 2)
		return false;

	float minMenuWidth = MinHorizontalItemWidth() * itemCount;
	float maxWidth = MaxHorizontalWidth();

	return minMenuWidth > maxWidth;
}


float
TExpandoMenuBar::MaxHorizontalWidth()
{
	return (fBarView->DragRegion()->Frame().left - 1) - kDeskbarMenuWidth;
}


void
TExpandoMenuBar::SizeWindow(int32 delta)
{
	// instead of resizing the window here and there in the
	// code the resize method will be centered in one place
	// thus, the same behavior (good or bad) will be used
	// wherever window sizing is done
	if (fBarView == NULL || Window() == NULL)
		return;

	BRect screenFrame = (BScreen(Window())).Frame();
	fBarView->SizeWindow(screenFrame);
	fBarView->PositionWindow(screenFrame);

	if (!Vertical())
		CheckItemSizes(delta);

	fBarView->CheckForScrolling();
	Window()->UpdateIfNeeded();
	Invalidate();
}


void
TExpandoMenuBar::StartMonitoringWindows()
{
	if (sMonThread != B_ERROR)
		return;

	sDoMonitor = true;
	sMonThread = spawn_thread(monitor_team_windows,
		"Expando Window Watcher", B_LOW_PRIORITY, this);
	resume_thread(sMonThread);
}


void
TExpandoMenuBar::StopMonitoringWindows()
{
	if (sMonThread == B_ERROR)
		return;

	sDoMonitor = false;
	status_t returnCode;
	wait_for_thread(sMonThread, &returnCode);

	sMonThread = B_ERROR;
}


int32
TExpandoMenuBar::monitor_team_windows(void* arg)
{
	TExpandoMenuBar* teamMenu = (TExpandoMenuBar*)arg;

	while (teamMenu->sDoMonitor) {
		sMonLocker.Lock();

		if (teamMenu->Window()->LockWithTimeout(50000) == B_OK) {
			int32 totalItems = teamMenu->CountItems();

			// Set all WindowMenuItems to require an update.
			TWindowMenuItem* item = NULL;
			for (int32 i = 0; i < totalItems; i++) {
				if (!teamMenu->SubmenuAt(i)) {
					item = static_cast<TWindowMenuItem*>(teamMenu->ItemAt(i));
					item->SetRequireUpdate(true);
				}
			}

			// Perform SetTo() on all the items that still exist as well as add
			// new items.
			bool itemModified = false;
			bool resize = false;
			TTeamMenuItem* teamItem = NULL;

			for (int32 i = 0; i < totalItems; i++) {
				if (teamMenu->SubmenuAt(i) == NULL)
					continue;

				teamItem = static_cast<TTeamMenuItem*>(teamMenu->ItemAt(i));
				if (teamItem->IsExpanded()) {
					int32 teamCount = teamItem->Teams()->CountItems();
					for (int32 j = 0; j < teamCount; j++) {
						// The following code is almost a copy/paste from
						// WindowMenu.cpp
						team_id theTeam = (addr_t)teamItem->Teams()->ItemAt(j);
						int32 count = 0;
						int32* tokens = get_token_list(theTeam, &count);

						for (int32 k = 0; k < count; k++) {
							client_window_info* wInfo
								= get_window_info(tokens[k]);
							if (wInfo == NULL)
								continue;

							BString windowName(wInfo->name);

							BString teamPrefix(teamItem->Label());
							teamPrefix.Append(": ");

							BString teamSuffix(" - ");
							teamSuffix.Append(teamItem->Label());

							if (windowName.StartsWith(teamPrefix))
								windowName.RemoveFirst(teamPrefix);
							if (windowName.EndsWith(teamSuffix))
								windowName.RemoveLast(teamSuffix);

							if (TWindowMenu::WindowShouldBeListed(wInfo)) {
								// Check if we have a matching window item...
								item = teamItem->ExpandedWindowItem(
									wInfo->server_token);
								if (item != NULL) {
									item->SetTo(windowName,
										wInfo->server_token, wInfo->is_mini,
										((1 << current_workspace())
											& wInfo->workspaces) != 0);

									if (strcasecmp(item->Label(), windowName)
											> 0) {
										item->SetLabel(windowName);
									}
									if (item->Modified())
										itemModified = true;
								} else if (teamItem->IsExpanded()) {
									// Add the item
									item = new TWindowMenuItem(windowName,
										wInfo->server_token, wInfo->is_mini,
										((1 << current_workspace())
											& wInfo->workspaces) != 0, false);
									item->SetExpanded(true);
									teamMenu->AddItem(item,
										TWindowMenuItem::InsertIndexFor(
											teamMenu, i + 1, item));
									resize = true;
								}
							}
							free(wInfo);
						}
						free(tokens);
					}
				}
			}

			// Remove any remaining items which require an update.
			for (int32 i = 0; i < totalItems; i++) {
				if (!teamMenu->SubmenuAt(i)) {
					item = static_cast<TWindowMenuItem*>(teamMenu->ItemAt(i));
					if (item && item->RequiresUpdate()) {
						item = static_cast<TWindowMenuItem*>
							(teamMenu->RemoveItem(i));
						delete item;
						totalItems--;

						resize = true;
					}
				}
			}

			// If any of the WindowMenuItems changed state, we need to force a
			// repaint.
			if (itemModified || resize) {
				teamMenu->Invalidate();
				if (resize)
					teamMenu->SizeWindow(1);
			}

			teamMenu->Window()->Unlock();
		}

		sMonLocker.Unlock();

		// sleep for a bit...
		snooze(150000);
	}
	return B_OK;
}


void
TExpandoMenuBar::_FinishedDrag(bool invoke)
{
	if (fPreviousDragTargetItem != NULL) {
		if (invoke)
			fPreviousDragTargetItem->Invoke();

		fPreviousDragTargetItem->SetOverrideSelected(false);
		fPreviousDragTargetItem = NULL;
	}

	if (!invoke && fBarView != NULL && fBarView->Dragging())
		fBarView->DragStop(true);
}