Deskbar: Resizable tray

* Adds max width and height arguments to
  instantiate_deskbar_(item|entry).
* Old applications just stay with a 16x16 scaled icon, though.
* All used apps within the repository are converted to the new call
  besides the input_server input method icon (that will need further
  API changes in the input_server).

Change-Id: I29cc439396917be2c24135888459d31364997dff
Reviewed-on: https://review.haiku-os.org/656
Reviewed-by: waddlesplash <[email protected]>

docs/develop/kits/interface/usecases/BDeskbarUseCases.html

@@ -47,13 +47,13 @@ through a pointer to an int32.</P></LI>
 
 <LI><P><B>Add Item 2:</B> The AddItem() member function can be used to add an item to the deskbar
 shelf by passing a pointer to an entry_ref.  The file pointed to by this entry_ref should be
-an addon that exports the symbol "BView *instantiate_deskbar_item()".  This entry point is used to
+an addon that exports the symbol "BView *instantiate_deskbar_item(float, float)".  This entry point is used to
 get a BView which it can display in the shelf.  More information on this mechanism can be found in
 the <A HREF="file:///boot/beos/documentation/Be%20Book/Release%20Notes/Deskbar.html">Deskbar Release Notes</A>
 but not in the Be Book proper.  The item id of the added item is passed back in an int32 pointer
 provided by the caller.  NOTE: The source code for the deskbar found in
 <A HREF="http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/opentracker/opentracker/deskbar/StatusView.cpp?rev=1.5&content-type=text/vnd.viewcvs-markup">TReplicantTray::LoadAddon()</A>
-indicates that it also looks for a symbol called "BView *instantiate_deskbar_entry(image_id, entry_ref *)"
+indicates that it also looks for a symbol called "BView *instantiate_deskbar_entry(image_id, entry_ref*, float, float)"
 first, but there is no documentation on this.</P></LI>
 
 <LI><P><B>Remove Item 1:</B> The RemoveItem() member function takes an integer id and removes it
@@ -155,7 +155,7 @@ theMsg.AddMessage("view", &amp;viewMsg);    // This puts the archived view in th
 </PRE>
 
 <P>Or, the AddItem() member sends the following message to the deskbar to add an item from a file
-that exports the "BView *instantiate_deskbar_item(void)" function:</P>
+that exports the "BView *instantiate_deskbar_item(float, float)" function:</P>
 
 <PRE>
 BMessage theMsg;

headers/os/interface/Deskbar.h

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2009, Haiku, Inc. All rights reserved.
+ * Copyright 2006-2018, Haiku, Inc. All rights reserved.
  * Distributed under the terms of the MIT License.
  */
 #ifndef	_DESKBAR_H
@@ -56,6 +56,8 @@ public:
 			bool				HasItem(int32 id) const;
 			bool				HasItem(const char* name) const;
 			uint32				CountItems() const;
+			float				MaxItemWidth() const;
+			float				MaxItemHeight() const;
 
 	// Item modification methods
 			status_t			AddItem(BView* archivableView,

headers/private/interface/DeskbarPrivate.h

@@ -29,6 +29,7 @@ static const uint32 kMsgAddAddOn = 'adon';
 static const uint32 kMsgHasItem = 'exst';
 static const uint32 kMsgGetItemInfo = 'info';
 static const uint32 kMsgCountItems = 'cwnt';
+static const uint32 kMsgMaxItemSize = 'mxsz';
 static const uint32 kMsgRemoveItem = 'remv';
 static const uint32 kMsgLocation = 'gloc';
 static const uint32 kMsgIsExpanded = 'gexp';

src/apps/deskbar/BarApp.cpp

@@ -400,6 +400,7 @@ TBarApp::MessageReceived(BMessage* message)
 		case kMsgGetItemInfo:
 		case kMsgHasItem:
 		case kMsgCountItems:
+		case kMsgMaxItemSize:
 		case kMsgAddView:
 		case kMsgRemoveItem:
 		case kMsgAddAddOn:

src/apps/deskbar/BarView.cpp

@@ -1119,6 +1119,14 @@ TBarView::CountItems(DeskbarShelf)
 }
 
 
+BSize
+TBarView::MaxItemSize(DeskbarShelf shelf)
+{
+	return BSize(fReplicantTray->MaxReplicantWidth(),
+		fReplicantTray->MaxReplicantHeight());
+}
+
+
 status_t
 TBarView::AddItem(BMessage* item, DeskbarShelf, int32* id)
 {

src/apps/deskbar/BarView.h

@@ -143,6 +143,8 @@ public:
 
 			int32			CountItems(DeskbarShelf shelf);
 
+			BSize			MaxItemSize(DeskbarShelf shelf);
+
 			status_t		AddItem(BMessage* archive, DeskbarShelf shelf,
 								int32* id);
 			status_t		AddItem(BEntry* entry, DeskbarShelf shelf,

src/apps/deskbar/BarWindow.cpp

@@ -198,6 +198,10 @@ TBarWindow::MessageReceived(BMessage* message)
 			CountItems(message);
 			break;
 
+		case kMsgMaxItemSize:
+			MaxItemSize(message);
+			break;
+
 		case kMsgAddAddOn:
 		case kMsgAddView:
 			AddItem(message);
@@ -545,6 +549,24 @@ TBarWindow::CountItems(BMessage* message)
 }
 
 
+void
+TBarWindow::MaxItemSize(BMessage* message)
+{
+	DeskbarShelf shelf;
+#if SHELF_AWARE
+	if (message->FindInt32("shelf", (int32*)&shelf) != B_OK)
+#endif
+		shelf = B_DESKBAR_TRAY;
+
+	BSize size = fBarView->MaxItemSize(shelf);
+
+	BMessage reply('rply');
+	reply.AddFloat("width", size.width);
+	reply.AddFloat("height", size.height);
+	message->SendReply(&reply);
+}
+
+
 void
 TBarWindow::AddItem(BMessage* message)
 {

src/apps/deskbar/BarWindow.h

@@ -78,6 +78,7 @@ public:
 			void				ItemExists(BMessage* message);
 
 			void				CountItems(BMessage* message);
+			void				MaxItemSize(BMessage* message);
 
 			void				AddItem(BMessage* message);
 			void				RemoveItem(BMessage* message);

src/apps/deskbar/StatusView.cpp

@@ -136,13 +136,20 @@ TReplicantTray::TReplicantTray(TBarView* parent, bool vertical)
 	fMultiRowMode(vertical),
 	fAlignmentSupport(false)
 {
+	fMaxReplicantHeight = std::max(kMinReplicantHeight,
+		floorf(kMinReplicantHeight * be_plain_font->Size() / 12));
+	// TODO: depends on window size... (so use something like
+	// max(129, height * 3), and restrict the minimum window width for it)
+	fMaxReplicantWidth = 129;
+
+	fMinTrayHeight = kGutter + fMaxReplicantHeight + kGutter;
 	if (vertical)
 		fMinimumTrayWidth = gMinimumWindowWidth - kGutter - kDragRegionWidth;
 	else
 		fMinimumTrayWidth = kMinimumTrayWidth;
 
 	// Create the time view
-	fTime = new TTimeView(fMinimumTrayWidth, kMaxReplicantHeight - 1.0);
+	fTime = new TTimeView(fMinimumTrayWidth, fMaxReplicantHeight - 1.0);
 }
 
 
@@ -211,7 +218,7 @@ void
 TReplicantTray::GetPreferredSize(float* preferredWidth, float* preferredHeight)
 {
 	float width = 0;
-	float height = kMinimumTrayHeight;
+	float height = fMinTrayHeight;
 
 	if (fMultiRowMode) {
 		width = static_cast<TBarApp*>(be_app)->Settings()->width
@@ -221,12 +228,12 @@ TReplicantTray::GetPreferredSize(float* preferredWidth, float* preferredHeight)
 		else if (ReplicantCount() > 0) {
 			// The height will be uniform for the number of rows necessary
 			// to show all the replicants and gutters.
-			int32 rowCount = (int32)(height / kMaxReplicantHeight);
-			height = kGutter + (rowCount * kMaxReplicantHeight)
+			int32 rowCount = (int32)(height / fMaxReplicantHeight);
+			height = kGutter + (rowCount * fMaxReplicantHeight)
 				+ ((rowCount - 1) * kIconGap) + kGutter;
-			height = std::max(kMinimumTrayHeight, height);
+			height = std::max(fMinTrayHeight, height);
 		} else
-			height = kMinimumTrayHeight;
+			height = fMinTrayHeight;
 	} else {
 		// if last replicant overruns clock then resize to accomodate
 		if (ReplicantCount() > 0) {
@@ -240,7 +247,7 @@ TReplicantTray::GetPreferredSize(float* preferredWidth, float* preferredHeight)
 		}
 
 		// this view has a fixed minimum width
-		width = std::max(fMinimumTrayWidth, width);
+		width = std::max(kMinimumTrayWidth, width);
 		height = kGutter + static_cast<TBarApp*>(be_app)->IconSize() + kGutter;
 	}
 
@@ -641,8 +648,8 @@ TReplicantTray::LoadAddOn(BEntry* entry, int32* id, bool addToSettings)
 	//    we first look for a symbol that takes an image_id
 	//    and entry_ref pointer, if not found, go with normal
 	//    instantiate function
-	BView* (*entryFunction)(image_id, const entry_ref*);
-	BView* (*itemFunction)(void);
+	BView* (*entryFunction)(image_id, const entry_ref*, float, float);
+	BView* (*itemFunction)(float, float);
 	BView* view = NULL;
 
 	entry_ref ref;
@@ -650,10 +657,11 @@ TReplicantTray::LoadAddOn(BEntry* entry, int32* id, bool addToSettings)
 
 	if (get_image_symbol(image, kInstantiateEntryCFunctionName,
 			B_SYMBOL_TYPE_TEXT, (void**)&entryFunction) >= B_OK) {
-		view = (*entryFunction)(image, &ref);
+		view = (*entryFunction)(image, &ref, fMaxReplicantWidth,
+			fMaxReplicantHeight);
 	} else if (get_image_symbol(image, kInstantiateItemCFunctionName,
 			B_SYMBOL_TYPE_TEXT, (void**)&itemFunction) >= B_OK) {
-		view = (*itemFunction)();
+		view = (*itemFunction)(fMaxReplicantWidth, fMaxReplicantHeight);
 	} else {
 		unload_add_on(image);
 		return B_ERROR;
@@ -1121,7 +1129,7 @@ TReplicantTray::AcceptAddon(BRect replicantFrame, BMessage* message)
 	if (message == NULL)
 		return false;
 
-	if (replicantFrame.Height() > kMaxReplicantHeight)
+	if (replicantFrame.Height() > fMaxReplicantHeight)
 		return false;
 
 	alignment align = B_ALIGN_LEFT;
@@ -1163,12 +1171,12 @@ TReplicantTray::LocationForReplicant(int32 index, float replicantWidth)
 
 	if (fMultiRowMode) {
 		// try to find free space in every row
-		for (int32 row = 0; ; loc.y += kMaxReplicantHeight + kIconGap, row++) {
+		for (int32 row = 0; ; loc.y += fMaxReplicantHeight + kIconGap, row++) {
 			// determine free space in this row
 			BRect rowRect(loc.x, loc.y,
 				loc.x + static_cast<TBarApp*>(be_app)->Settings()->width
 					- (kTrayPadding + kDragWidth + kGutter) * 2,
-				loc.y + kMaxReplicantHeight);
+				loc.y + fMaxReplicantHeight);
 			if (row == 0 && !fTime->IsHidden())
 				rowRect.right -= kClockMargin + fTime->Frame().Width();
 
@@ -1210,7 +1218,7 @@ TReplicantTray::LocationForReplicant(int32 index, float replicantWidth)
 		|| (loc.y == fRightBottomReplicant.top
 			&& loc.x > fRightBottomReplicant.left)) {
 		fRightBottomReplicant.Set(loc.x, loc.y, loc.x + replicantWidth,
-			loc.y + kMaxReplicantHeight);
+			loc.y + fMaxReplicantHeight);
 		fLastReplicant = index;
 	}
 

src/apps/deskbar/StatusView.h

@@ -47,8 +47,8 @@ All rights reserved.
 
 
 const float kDragWidth = 4.0f;
-const float kMaxReplicantHeight = 16.0f;
-const float kMaxReplicantWidth = 16.0f;
+const float kMinReplicantHeight = 16.0f;
+const float kMinReplicantWidth = 16.0f;
 const int32 kMinimumReplicantCount = 6;
 const int32 kIconGap = 2;
 const int32 kGutter = 1;
@@ -59,10 +59,9 @@ const int32 kClockMargin = 12;
 // 1 pixel for left gutter
 // space for replicant tray (6 items)
 // 6 pixel drag region
-const float kMinimumTrayWidth = kIconGap + kMaxReplicantWidth
+const float kMinimumTrayWidth = kIconGap + kMinReplicantWidth
 	+ (kMinimumReplicantCount * kIconGap)
-	+ (kMinimumReplicantCount * kMaxReplicantWidth) + kGutter;
-const float kMinimumTrayHeight = kGutter + kMaxReplicantHeight + kGutter;
+	+ (kMinimumReplicantCount * kMinReplicantWidth) + kGutter;
 
 extern float gMinimumWindowWidth;
 extern float gMaximumWindowWidth;
@@ -109,6 +108,10 @@ public:
 				bool				IconExists(const char* name);
 
 				int32				ReplicantCount() const;
+				float				MaxReplicantWidth() const
+										{ return fMaxReplicantWidth; }
+				float				MaxReplicantHeight() const
+										{ return fMaxReplicantHeight; }
 
 				status_t			AddIcon(BMessage*, int32* id,
 										const entry_ref* = NULL);
@@ -174,6 +177,9 @@ private:
 				TReplicantShelf*	fShelf;
 				BRect				fRightBottomReplicant;
 				int32				fLastReplicant;
+				float				fMaxReplicantWidth;
+				float				fMaxReplicantHeight;
+				float				fMinTrayHeight;
 
 				bool				fMultiRowMode;
 				float				fMinimumTrayWidth;

src/apps/networkstatus/NetworkStatusView.cpp

@@ -64,7 +64,7 @@ static const char *kStatusDescriptions[] = {
 	B_TRANSLATE("Ready")
 };
 
-extern "C" _EXPORT BView *instantiate_deskbar_item(void);
+extern "C" _EXPORT BView *instantiate_deskbar_item(float maxWidth, float maxHeight);
 
 
 const uint32 kMsgShowConfiguration = 'shcf';
@@ -574,9 +574,9 @@ NetworkStatusView::_OpenNetworksPreferences()
 
 
 extern "C" _EXPORT BView *
-instantiate_deskbar_item(void)
+instantiate_deskbar_item(float maxWidth, float maxHeight)
 {
-	return new NetworkStatusView(BRect(0, 0, 15, 15),
+	return new NetworkStatusView(BRect(0, 0, maxHeight - 1, maxHeight - 1),
 		B_FOLLOW_LEFT | B_FOLLOW_TOP, true);
 }
 

src/apps/powerstatus/PowerStatusView.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2017, Haiku, Inc. All Rights Reserved.
+ * Copyright 2006-2018, Haiku, Inc. All Rights Reserved.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -49,7 +49,8 @@
 #define B_TRANSLATION_CONTEXT "PowerStatus"
 
 
-extern "C" _EXPORT BView *instantiate_deskbar_item(void);
+extern "C" _EXPORT BView *instantiate_deskbar_item(float maxWidth,
+	float maxHeight);
 extern const char* kDeskbarItemName;
 
 const uint32 kMsgToggleLabel = 'tglb';
@@ -397,7 +398,7 @@ PowerStatusView::Update(bool force)
 
 	if (fInDeskbar) {
 		// make sure the tray icon is (just) large enough
-		float width = fShowStatusIcon ? kMinIconWidth - 1 : 0;
+		float width = fShowStatusIcon ? Bounds().Height() : 0;
 
 		if (fShowLabel) {
 			char text[64];
@@ -870,7 +871,8 @@ PowerStatusReplicant::_OpenExtendedWindow()
 
 
 extern "C" _EXPORT BView*
-instantiate_deskbar_item(void)
+instantiate_deskbar_item(float maxWidth, float maxHeight)
 {
-	return new PowerStatusReplicant(BRect(0, 0, 15, 15), B_FOLLOW_NONE, true);
+	return new PowerStatusReplicant(BRect(0, 0, maxHeight - 1, maxHeight - 1),
+		B_FOLLOW_NONE, true);
 }

src/apps/processcontroller/ProcessController.cpp

@@ -1,7 +1,7 @@
 /*
 	ProcessController © 2000, Georges-Edouard Berenger, All Rights Reserved.
 	Copyright (C) 2004 beunited.org
-	Copyright (c) 2006-2015, Haiku, Inc. All rights reserved.
+	Copyright (c) 2006-2018, Haiku, Inc. All rights reserved.
 
 	This library is free software; you can redistribute it and/or
 	modify it under the terms of the GNU Lesser General Public
@@ -117,6 +117,7 @@ typedef struct {
 } Tdebug_thead_param;
 
 // Bar layout depending on number of CPUs
+// This is used only in case the replicant width is 16
 
 typedef struct {
 	float	cpu_width;
@@ -141,13 +142,14 @@ layoutT layout[] = {
 };
 
 
-extern "C" _EXPORT BView *instantiate_deskbar_item(void);
+extern "C" _EXPORT BView* instantiate_deskbar_item(float maxWidth,
+	float maxHeight);
 
 extern "C" _EXPORT BView*
-instantiate_deskbar_item(void)
+instantiate_deskbar_item(float maxWidth, float maxHeight)
 {
 	gInDeskbar = true;
-	return new ProcessController();
+	return new ProcessController(maxHeight - 1, maxHeight - 1);
 }
 
 
@@ -196,8 +198,10 @@ ProcessController::ProcessController(BMessage *data)
 }
 
 
-ProcessController::ProcessController()
-	: BView(BRect (0, 0, 15, 15), kDeskbarItemName, B_FOLLOW_NONE, B_WILL_DRAW),
+ProcessController::ProcessController(float width, float height)
+	:
+	BView(BRect (0, 0, width, height), kDeskbarItemName, B_FOLLOW_NONE,
+		B_WILL_DRAW),
 	fProcessControllerIcon(kSignature),
 	fProcessorIcon(k_cpu_mini),
 	fTrackerIcon(kTrackerSig),
@@ -602,10 +606,23 @@ ProcessController::DoDraw(bool force)
 	float h = floorf(bounds.Height ()) - 2;
 	float top = 1, left = 1;
 	float bottom = top + h;
-	float barWidth = layout[gCPUcount].cpu_width;
+	float barWidth;
+	float barGap;
+	float memWidth;
+	if (gCPUcount < 12 && bounds.Width() == 15) {
+		// Use fixed sizes for small icon sizes
+		barWidth = layout[gCPUcount].cpu_width;
+		barGap = layout[gCPUcount].cpu_inter;
+		memWidth = layout[gCPUcount].mem_width;
+	} else {
+		memWidth = floorf((bounds.Height() + 1) / 8);
+		barGap = bounds.Width() / gCPUcount > 3 ? 1 : 0;
+		barWidth = floorf((bounds.Width() - 2 - memWidth - barGap * gCPUcount)
+			/ gCPUcount);
+	}
 	// interspace
-	float right = left + gCPUcount * (barWidth + layout[gCPUcount].cpu_inter)
-		- layout[gCPUcount].cpu_inter; // right of CPU frame...
+	float right = left + gCPUcount * (barWidth + barGap) - barGap;
+		// right of CPU frame...
 	if (force && Parent()) {
 		SetHighColor(Parent()->ViewColor());
 		FillRect(BRect(right + 1, top - 1, right + 2, bottom + 1));
@@ -614,16 +631,15 @@ ProcessController::DoDraw(bool force)
 	if (force) {
 		SetHighColor(frame_color);
 		StrokeRect(BRect(left - 1, top - 1, right, bottom + 1));
-		if (gCPUcount > 1 && layout[gCPUcount].cpu_inter == 1) {
+		if (gCPUcount > 1 && barGap == 1) {
 			for (unsigned int x = 1; x < gCPUcount; x++)
 				StrokeLine(BPoint(left + x * barWidth + x - 1, top),
 					BPoint(left + x * barWidth + x - 1, bottom));
 		}
 	}
-	float leftMem = bounds.Width() - layout[gCPUcount].mem_width;
+	float leftMem = bounds.Width() - memWidth;
 	if (force)
-		StrokeRect(BRect(leftMem - 1, top - 1,
-			leftMem + layout[gCPUcount].mem_width, bottom + 1));
+		StrokeRect(BRect(leftMem - 1, top - 1, leftMem + memWidth, bottom + 1));
 
 	for (unsigned int x = 0; x < gCPUcount; x++) {
 		right = left + barWidth - 1;
@@ -654,7 +670,7 @@ ProcessController::DoDraw(bool force)
 			SetHighColor(active_color);
 			FillRect(BRect(left, limit + 1, right, active_bottom));
 		}
-		left += layout[gCPUcount].cpu_width + layout[gCPUcount].cpu_inter;
+		left += barWidth + barGap;
 		fLastBarHeight[x] = barHeight;
 	}
 

src/apps/processcontroller/ProcessController.h

@@ -1,7 +1,7 @@
 /*
 	ProcessController © 2000, Georges-Edouard Berenger, All Rights Reserved.
 	Copyright (C) 2004 beunited.org
-	Copyright (c) 2006-2013, Haiku, Inc. All rights reserved.
+	Copyright (c) 2006-2018, Haiku, Inc. All rights reserved.
 
 	This library is free software; you can redistribute it and/or
 	modify it under the terms of the GNU Lesser General Public
@@ -34,7 +34,7 @@ class ProcessController : public BView {
 	public:
 						ProcessController(BRect frame, bool temp = false);
 						ProcessController(BMessage *data);
-						ProcessController();
+						ProcessController(float width, float height);
 		virtual			~ProcessController();
 
 		virtual	void	MessageReceived(BMessage *message);

src/apps/pulse/DeskbarPulseView.cpp

@@ -138,7 +138,7 @@ void DeskbarPulseView::MessageReceived(BMessage *message) {
 			break;
 		case PRV_DESKBAR_ICON_WIDTH: {
 			int width = message->FindInt32("width");
-			ResizeTo(width - 1, 15);
+			ResizeTo(width - 1, Bounds().Height());
 			Draw(Bounds());
 			break;
 		}

src/apps/pulse/PulseApp.cpp

@@ -266,7 +266,8 @@ LoadInDeskbar()
 		width = min_width;
 	}
 
-	BRect rect(0, 0, width - 1, 15);
+	float height = deskbar->MaxItemHeight();
+	BRect rect(0, 0, width - 1, height - 1);
 	DeskbarPulseView *replicant = new DeskbarPulseView(rect);
 	status_t err = deskbar->AddItem(replicant);
 	delete replicant;

src/apps/workspaces/Workspaces.cpp

@@ -58,7 +58,8 @@ static const uint32 kMsgToggleLiveInDeskbar = 'tgDb';
 static const uint32 kMsgToggleSwitchOnWheel = 'tgWh';
 
 
-extern "C" _EXPORT BView* instantiate_deskbar_item();
+extern "C" _EXPORT BView* instantiate_deskbar_item(float maxWidth,
+	float maxHeight);
 
 
 static status_t
@@ -1092,7 +1093,18 @@ WorkspacesApp::ArgvReceived(int32 argc, char **argv)
 }
 
 
-BView* instantiate_deskbar_item()
+void
+WorkspacesApp::ReadyToRun()
+{
+	fWindow->Show();
+}
+
+
+//	#pragma mark -
+
+
+BView*
+instantiate_deskbar_item(float maxWidth, float maxHeight)
 {
 	// Calculate the correct size of the Deskbar replicant first
 
@@ -1103,15 +1115,14 @@ BView* instantiate_deskbar_item()
 	uint32 columns, rows;
 	BPrivate::get_workspaces_layout(&columns, &rows);
 
-	// ╔═╤═╕ A Deskbar replicant can be 16px tall and 129px wide at most.
-	// ║ │ │ We use 1px for the top and left borders (shown as double)
-	// ╟─┼─┤ and divide the remainder equally. However, we keep in mind
-	// ║ │ │ that the actual width and height of each workspace is smaller
-	// ╙─┴─┘ by 1px, because of bottom/right borders (shown as single).
+	// We use 1px for the top and left borders (shown as double)
+	// and divide the remainder equally. However, we keep in mind
+	// that the actual width and height of each workspace is smaller
+	// by 1px, because of bottom/right borders (shown as single).
 	// When calculating workspace width, we must ensure that the assumed
 	// actual workspace height is not negative. Zero is OK.
 
-	float height = 16;
+	float height = maxHeight;
 	float rowHeight = floor((height - 1) / rows);
 	if (rowHeight < 1)
 		rowHeight = 1;
@@ -1119,20 +1130,13 @@ BView* instantiate_deskbar_item()
 	float columnWidth = floor((rowHeight - 1) * aspectRatio) + 1;
 
 	float width = columnWidth * columns + 1;
-	if (width > 129)
-		width = 129;
+	if (width > maxWidth)
+		width = maxWidth;
 
 	return new WorkspacesView(BRect (0, 0, width - 1, height - 1), false);
 }
 
 
-void
-WorkspacesApp::ReadyToRun()
-{
-	fWindow->Show();
-}
-
-
 //	#pragma mark -
 
 

src/bin/desklink/MediaReplicant.cpp

@@ -640,8 +640,9 @@ MediaReplicant::_ConnectMixer()
 
 
 extern "C" BView*
-instantiate_deskbar_item(void)
+instantiate_deskbar_item(float maxWidth, float maxHeight)
 {
-	return new MediaReplicant(BRect(0, 0, 16, 16), kReplicantName);
+	return new MediaReplicant(BRect(0, 0, maxHeight - 1, maxHeight - 1),
+		kReplicantName);
 }
 

src/kits/interface/Deskbar.cpp

@@ -320,7 +320,33 @@ BDeskbar::CountItems() const
 }
 
 
-//	#pragma mark - Item querying methods
+float
+BDeskbar::MaxItemWidth() const
+{
+	BMessage request(kMsgMaxItemSize);
+	BMessage reply;
+
+	if (fMessenger->SendMessage(&request, &reply) == B_OK)
+		return reply.GetFloat("width", 129);
+
+	return 129;
+}
+
+
+float
+BDeskbar::MaxItemHeight() const
+{
+	BMessage request(kMsgMaxItemSize);
+	BMessage reply;
+
+	if (fMessenger->SendMessage(&request, &reply) == B_OK)
+		return reply.GetFloat("height", 16);
+
+	return 16;
+}
+
+
+//	#pragma mark - Item modification methods
 
 
 status_t

src/servers/mail/DeskbarView.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2012, Haiku Inc. All Rights Reserved.
+ * Copyright 2004-2018, Haiku Inc. All Rights Reserved.
  * Copyright 2001 Dr. Zoidberg Enterprises. All rights reserved.
  *
  * Distributed under the terms of the MIT License.
@@ -65,29 +65,34 @@ const char* kTrackerSignature = "application/x-vnd.Be-TRAK";
 #define text_part_size data_size
 #endif
 
-extern "C" _EXPORT BView* instantiate_deskbar_item();
+
+extern "C" _EXPORT BView* instantiate_deskbar_item(float maxWidth,
+	float maxHeight);
 
 
-status_t our_image(image_info* image)
+status_t
+our_image(image_info* image)
 {
 	int32 cookie = 0;
 	status_t ret;
 	while ((ret = get_next_image_info(0, &cookie, image)) == B_OK) {
-		if ((char*)our_image >= (char*)image->text_part &&
-			(char*)our_image <= (char*)image->text_part + image->text_part_size)
+		if ((char*)our_image >= (char*)image->text_part
+			&& (char*)our_image <= (char*)image->text_part
+				+ image->text_part_size)
 			break;
 	}
 
 	return ret;
 }
 
-BView* instantiate_deskbar_item(void)
+
+BView*
+instantiate_deskbar_item(float maxWidth, float maxHeight)
 {
-	return new DeskbarView(BRect(0, 0, 15, 15));
+	return new DeskbarView(BRect(0, 0, maxHeight - 1, maxHeight - 1));
 }
 
 
-//-------------------------------------------------------------------------------
 //	#pragma mark -