Workspaces: Move fSwitchOnWheel setting to view

... and re-enable it. Off by default. The view controls just this
one setting while the window controls the rest. However they both
share a common settings file on disk. This means that a change in
one view's wheel setting will affect all others when relaunched,
but won't affect already running instances, this is intentional.

WorkspacesSettings::_Open() method has been moved to a static
function OpenSettingsFile() and is used both by WorkspacesSettings
and WorkspacesView classes.

The switch on wheel setting was disabled for view-only (replicant)
Workspaces instances in hrev50796, this seeks to restore it.

That commit says:
"A cleaner solution would be to read the settings once if there is
no WorkspacesWindow, and use the setting from there instead."

Instead of that, we read the setting from the file on disk and
write it to disk too bypassing the window entirely.

Used local pointer style.
Some style fixes mixed in.

src/apps/workspaces/Workspaces.cpp

@@ -60,6 +60,33 @@ static const uint32 kMsgToggleSwitchOnWheel = 'tgWh';
 
 extern "C" _EXPORT BView* instantiate_deskbar_item();
 
+
+static status_t
+OpenSettingsFile(BFile& file, int mode)
+{
+	BPath path;
+	status_t status = find_directory(B_USER_SETTINGS_DIRECTORY, &path);
+	if (status != B_OK)
+		status = find_directory(B_SYSTEM_SETTINGS_DIRECTORY, &path);
+	if (status != B_OK)
+		return status;
+
+	status = path.Append(kSettingsFile);
+	if (status != B_OK)
+		return status;
+
+	status = file.SetTo(path.Path(), mode);
+	if (mode == B_READ_ONLY && status == B_ENTRY_NOT_FOUND) {
+		if (find_directory(B_SYSTEM_SETTINGS_DIRECTORY, &path) == B_OK
+			&& path.Append(kSettingsFile) == B_OK) {
+			status = file.SetTo(path.Path(), mode);
+		}
+	}
+
+	return status;
+}
+
+
 class WorkspacesSettings {
 	public:
 		WorkspacesSettings();
@@ -72,7 +99,6 @@ class WorkspacesSettings {
 		bool AlwaysOnTop() const { return fAlwaysOnTop; }
 		bool HasTitle() const { return fHasTitle; }
 		bool HasBorder() const { return fHasBorder; }
-		bool SwitchOnWheel() const { return fSwitchOnWheel; }
 		bool SettingsLoaded() const { return fLoaded; }
 
 		void UpdateFramesForScreen(BRect screenFrame);
@@ -83,18 +109,14 @@ class WorkspacesSettings {
 		void SetAlwaysOnTop(bool enable) { fAlwaysOnTop = enable; }
 		void SetHasTitle(bool enable) { fHasTitle = enable; }
 		void SetHasBorder(bool enable) { fHasBorder = enable; }
-		void SetSwitchOnWheel(bool enable) { fSwitchOnWheel = enable; }
 
 	private:
-		status_t _Open(BFile& file, int mode);
-
 		BRect	fWindowFrame;
 		BRect	fScreenFrame;
 		bool	fAutoRaising;
 		bool	fAlwaysOnTop;
 		bool	fHasTitle;
 		bool	fHasBorder;
-		bool	fSwitchOnWheel;
 		bool	fLoaded;
 };
 
@@ -116,6 +138,9 @@ class WorkspacesView : public BView {
 			const BMessage* dragMessage);
 		virtual void MouseDown(BPoint where);
 
+		bool SwitchOnWheel() const { return fSwitchOnWheel; }
+		void SetSwitchOnWheel(bool enable);
+
 	private:
 		void _AboutRequested();
 
@@ -123,8 +148,12 @@ class WorkspacesView : public BView {
 		void _ExcludeFromParentClipping();
 		void _CleanupParentClipping();
 
+		void _LoadSettings();
+		void _SaveSettings();
+
 		BView*	fParentWhichDrawsOnChildren;
 		BRect	fCurrentFrame;
+		bool	fSwitchOnWheel;
 };
 
 class WorkspacesWindow : public BWindow {
@@ -142,8 +171,6 @@ class WorkspacesWindow : public BWindow {
 
 		void SetAutoRaise(bool enable);
 		bool IsAutoRaising() const { return fSettings->AutoRaising(); }
-		void SetSwitchOnWheel(bool enable);
-		bool SwitchOnWheel() const { return fSwitchOnWheel; }
 
 		float GetTabHeight() { return fSettings->HasTitle() ? fTabHeight : 0; }
 		float GetBorderWidth() { return fBorderWidth; }
@@ -151,7 +178,7 @@ class WorkspacesWindow : public BWindow {
 
 	private:
 		WorkspacesSettings *fSettings;
-		bool	fSwitchOnWheel;
+		WorkspacesView *fWorkspacesView;
 		float	fTabHeight;
 		float	fBorderWidth;
 };
@@ -172,13 +199,15 @@ class WorkspacesApp : public BApplication {
 };
 
 
+//	#pragma mark - WorkspacesSettings
+
+
 WorkspacesSettings::WorkspacesSettings()
 	:
 	fAutoRaising(false),
 	fAlwaysOnTop(false),
 	fHasTitle(true),
 	fHasBorder(true),
-	fSwitchOnWheel(false),
 	fLoaded(false)
 {
 	UpdateScreenFrame();
@@ -186,22 +215,17 @@ WorkspacesSettings::WorkspacesSettings()
 	BScreen screen;
 
 	BFile file;
-	if (_Open(file, B_READ_ONLY) == B_OK) {
+	if (OpenSettingsFile(file, B_READ_ONLY) == B_OK) {
 		BMessage settings;
 		if (settings.Unflatten(&file) == B_OK) {
-			if (settings.FindRect("window", &fWindowFrame) == B_OK
+			fLoaded = settings.FindRect("window", &fWindowFrame) == B_OK
-				&& settings.FindRect("screen", &fScreenFrame) == B_OK)
+				&& settings.FindRect("screen", &fScreenFrame) == B_OK;
-				fLoaded = true;
-
 			settings.FindBool("auto-raise", &fAutoRaising);
 			settings.FindBool("always on top", &fAlwaysOnTop);
-
 			if (settings.FindBool("has title", &fHasTitle) != B_OK)
 				fHasTitle = true;
 			if (settings.FindBool("has border", &fHasBorder) != B_OK)
 				fHasBorder = true;
-			if (settings.FindBool("switch on wheel", &fSwitchOnWheel) != B_OK)
-				fSwitchOnWheel = false;
 		}
 	} else {
 		// try reading BeOS compatible settings
@@ -235,45 +259,30 @@ WorkspacesSettings::WorkspacesSettings()
 
 WorkspacesSettings::~WorkspacesSettings()
 {
-	// write settings file
 	BFile file;
-	if (_Open(file, B_WRITE_ONLY | B_CREATE_FILE | B_ERASE_FILE) != B_OK)
+
+	// read switch on wheel setting from file
+	bool switchOnWheel = false;
+	if (OpenSettingsFile(file, B_READ_ONLY) == B_OK) {
+		BMessage settings;
+		if (settings.Unflatten(&file) == B_OK)
+			settings.FindBool("switch on wheel", &switchOnWheel);
+	}
+
+	// write settings file
+	if (OpenSettingsFile(file, B_WRITE_ONLY | B_CREATE_FILE) != B_OK)
 		return;
 
 	BMessage settings('wksp');
-
 	if (settings.AddRect("window", fWindowFrame) == B_OK
 		&& settings.AddRect("screen", fScreenFrame) == B_OK
 		&& settings.AddBool("auto-raise", fAutoRaising) == B_OK
 		&& settings.AddBool("always on top", fAlwaysOnTop) == B_OK
 		&& settings.AddBool("has title", fHasTitle) == B_OK
 		&& settings.AddBool("has border", fHasBorder) == B_OK
-		&& settings.AddBool("switch on wheel", fSwitchOnWheel) == B_OK)
+		&& settings.AddBool("switch on wheel", switchOnWheel) == B_OK) {
 		settings.Flatten(&file);
 	}
-
-
-status_t
-WorkspacesSettings::_Open(BFile& file, int mode)
-{
-	BPath path;
-	status_t status = find_directory(B_USER_SETTINGS_DIRECTORY, &path);
-	if (status != B_OK)
-		status = find_directory(B_SYSTEM_SETTINGS_DIRECTORY, &path);
-	if (status != B_OK)
-		return status;
-
-	path.Append(kSettingsFile);
-
-	status = file.SetTo(path.Path(), mode);
-	if (mode == B_READ_ONLY && status == B_ENTRY_NOT_FOUND) {
-		if (find_directory(B_SYSTEM_SETTINGS_DIRECTORY, &path) == B_OK) {
-			path.Append(kSettingsFile);
-			status = file.SetTo(path.Path(), mode);
-		}
-	}
-
-	return status;
 }
 
 
@@ -315,7 +324,7 @@ WorkspacesSettings::SetWindowFrame(BRect frame)
 }
 
 
-//	#pragma mark -
+//	#pragma mark - WorkspacesView
 
 
 WorkspacesView::WorkspacesView(BRect frame, bool showDragger = true)
@@ -323,8 +332,11 @@ WorkspacesView::WorkspacesView(BRect frame, bool showDragger=true)
 	BView(frame, kDeskbarItemName, B_FOLLOW_ALL,
 		kWorkspacesViewFlag | B_FRAME_EVENTS),
 	fParentWhichDrawsOnChildren(NULL),
-	fCurrentFrame(frame)
+	fCurrentFrame(frame),
+	fSwitchOnWheel(false)
 {
+	_LoadSettings();
+
 	if (showDragger) {
 		frame.OffsetTo(B_ORIGIN);
 		frame.top = frame.bottom - 7;
@@ -340,8 +352,11 @@ WorkspacesView::WorkspacesView(BMessage* archive)
 	:
 	BView(archive),
 	fParentWhichDrawsOnChildren(NULL),
-	fCurrentFrame(Frame())
+	fCurrentFrame(Frame()),
+	fSwitchOnWheel(false)
 {
+	_LoadSettings();
+
 	// Just in case we are instantiated from an older archive...
 	SetFlags(Flags() | B_FRAME_EVENTS);
 	// Make sure the auto-raise feature didn't leave any artifacts - this is
@@ -353,6 +368,7 @@ WorkspacesView::WorkspacesView(BMessage* archive)
 
 WorkspacesView::~WorkspacesView()
 {
+	_SaveSettings();
 }
 
 
@@ -479,6 +495,32 @@ WorkspacesView::_CleanupParentClipping()
 }
 
 
+void
+WorkspacesView::_LoadSettings()
+{
+	BFile file;
+	if (OpenSettingsFile(file, B_READ_ONLY) == B_OK) {
+		BMessage settings;
+		if (settings.Unflatten(&file) == B_OK)
+			settings.FindBool("switch on wheel", &fSwitchOnWheel);
+	}
+}
+
+
+void
+WorkspacesView::_SaveSettings()
+{
+	BFile file;
+	if (OpenSettingsFile(file, B_READ_WRITE | B_CREATE_FILE) != B_OK)
+		return;
+
+	BMessage settings('wksp');
+	settings.Unflatten(&file);
+	if (settings.AddBool("switch on wheel", fSwitchOnWheel) == B_OK)
+		settings.Flatten(&file);
+}
+
+
 void
 WorkspacesView::MessageReceived(BMessage* message)
 {
@@ -489,9 +531,7 @@ WorkspacesView::MessageReceived(BMessage* message)
 
 		case B_MOUSE_WHEEL_CHANGED:
 		{
-			WorkspacesWindow* window
+			if (!fSwitchOnWheel)
-				= dynamic_cast<WorkspacesWindow*>(Window());
-			if (window == NULL || !window->SwitchOnWheel())
 				break;
 
 			float deltaY = message->FindFloat("be:wheel_delta_y");
@@ -516,6 +556,12 @@ WorkspacesView::MessageReceived(BMessage* message)
 			break;
 		}
 
+		case kMsgToggleSwitchOnWheel:
+		{
+			fSwitchOnWheel = !fSwitchOnWheel;
+			break;
+		}
+
 		default:
 			BView::MessageReceived(message);
 			break;
@@ -578,16 +624,16 @@ WorkspacesView::MouseDown(BPoint where)
 		B_UTF8_ELLIPSIS), new BMessage(kMsgChangeCount));
 	menu->AddItem(changeItem);
 
+	BMenuItem* switchItem = new BMenuItem(B_TRANSLATE("Switch on mouse wheel"),
+		new BMessage(kMsgToggleSwitchOnWheel));
+	menu->AddItem(switchItem);
+	switchItem->SetMarked(fSwitchOnWheel);
+
 	WorkspacesWindow *window = dynamic_cast<WorkspacesWindow*>(Window());
 	if (window != NULL) {
 		// inside Workspaces app
 		BMenuItem* item;
 
-		menu->AddSeparatorItem();
-		menu->AddItem(item = new BMenuItem(B_TRANSLATE("Switch on mouse wheel"),
-			new BMessage(kMsgToggleSwitchOnWheel)));
-		item->SetMarked(window->SwitchOnWheel());
-
 		menu->AddSeparatorItem();
 		menu->AddItem(item = new BMenuItem(B_TRANSLATE("Show window tab"),
 			new BMessage(kMsgToggleTitle)));
@@ -596,8 +642,9 @@ WorkspacesView::MouseDown(BPoint where)
 		menu->AddItem(item = new BMenuItem(B_TRANSLATE("Show window border"),
 			new BMessage(kMsgToggleBorder)));
 		if (window->Look() == B_TITLED_WINDOW_LOOK
-			|| window->Look() == B_MODAL_WINDOW_LOOK)
+			|| window->Look() == B_MODAL_WINDOW_LOOK) {
 			item->SetMarked(true);
+		}
 
 		menu->AddSeparatorItem();
 		menu->AddItem(item = new BMenuItem(B_TRANSLATE("Always on top"),
@@ -642,12 +689,24 @@ WorkspacesView::MouseDown(BPoint where)
 	}
 
 	changeItem->SetTarget(this);
+	switchItem->SetTarget(this);
+
 	ConvertToScreen(&where);
 	menu->Go(where, true, true, true);
 }
 
 
-//	#pragma mark -
+void
+WorkspacesView::SetSwitchOnWheel(bool enable)
+{
+	if (enable == fSwitchOnWheel)
+		return;
+
+	fSwitchOnWheel = enable;
+}
+
+
+//	#pragma mark - WorkspacesWindow
 
 
 WorkspacesWindow::WorkspacesWindow(WorkspacesSettings *settings)
@@ -657,7 +716,7 @@ WorkspacesWindow::WorkspacesWindow(WorkspacesSettings *settings)
 		B_AVOID_FRONT | B_WILL_ACCEPT_FIRST_CLICK | B_CLOSE_ON_ESCAPE,
 		B_ALL_WORKSPACES),
 	fSettings(settings),
-	fSwitchOnWheel(false)
+	fWorkspacesView(NULL)
 {
 	// Turn window decor on to grab decor widths.
 	BMessage windowSettings;
@@ -720,14 +779,13 @@ WorkspacesWindow::WorkspacesWindow(WorkspacesSettings *settings)
 	else if (!fSettings->HasTitle())
 		SetLook(B_MODAL_WINDOW_LOOK);
 
-	AddChild(new WorkspacesView(Bounds()));
+	fWorkspacesView = new WorkspacesView(Bounds());
+	AddChild(fWorkspacesView);
 
 	if (fSettings->AlwaysOnTop())
 		SetFeel(B_FLOATING_ALL_WINDOW_FEEL);
 	else
 		SetAutoRaise(fSettings->AutoRaising());
-
-	SetSwitchOnWheel(fSettings->SwitchOnWheel());
 }
 
 
@@ -904,10 +962,6 @@ WorkspacesWindow::MessageReceived(BMessage *message)
 			break;
 		}
 
-		case kMsgToggleSwitchOnWheel:
-			SetSwitchOnWheel(!SwitchOnWheel());
-			break;
-
 		default:
 			BWindow::MessageReceived(message);
 			break;
@@ -935,18 +989,7 @@ WorkspacesWindow::SetAutoRaise(bool enable)
 }
 
 
-void
+//	#pragma mark - WorkspacesApp
-WorkspacesWindow::SetSwitchOnWheel(bool enable)
-{
-	if (enable == fSwitchOnWheel)
-		return;
-
-	fSwitchOnWheel = enable;
-	fSettings->SetSwitchOnWheel(enable);
-}
-
-
-//	#pragma mark -
 
 
 WorkspacesApp::WorkspacesApp()