ScreenSaver: Stop saver on General tab.

Unfortunately OpenGL screen saver previews draw on top of the tabview,
so, when you switch to the General tab we now stop the screen saver
and then restart it when you come back to the Screensavers tab.

src/preferences/screensaver/ScreenSaverWindow.cpp

@@ -98,6 +98,14 @@ private:
 };
 
 
+class TabView : public BTabView {
+public:
+								TabView();
+
+	virtual	void				MouseDown(BPoint where);
+};
+
+
 class FadeView : public BView {
 public:
 								FadeView(const char* name,
@@ -148,6 +156,8 @@ public:
 			BScreenSaver*		ScreenSaver();
 
 private:
+	friend class TabView;
+
 	static	int					_CompareScreenSaverItems(const void* left,
 									const void* right);
 
@@ -836,6 +846,40 @@ ModulesView::_OpenSaver()
 }
 
 
+//	#pragma mark - TabView
+
+
+TabView::TabView()
+	:
+	BTabView("tab_view", B_WIDTH_FROM_LABEL)
+{
+}
+
+
+void
+TabView::MouseDown(BPoint where)
+{
+	BTab* fadeTab = TabAt(0);
+	BRect fadeTabFrame(TabFrame(0));
+	BTab* modulesTab = TabAt(1);
+	BRect modulesTabFrame(TabFrame(1));
+	ModulesView* modulesView = dynamic_cast<ModulesView*>(modulesTab->View());
+
+	if (fadeTab != NULL && Selection() != 0 && fadeTabFrame.Contains(where)
+		&& modulesView != NULL) {
+		// clicked on the fade tab
+		modulesView->SaveState();
+		modulesView->_CloseSaver();
+	} else if (modulesTab != NULL && Selection() != 1
+		&& modulesTabFrame.Contains(where) && modulesView != NULL) {
+		// clicked on the modules tab
+		modulesView->MessageReceived(new BMessage(kMsgSaverSelected));
+	}
+
+	BTabView::MouseDown(where);
+}
+
+
 //	#pragma mark - ScreenSaverWindow
 
 
@@ -861,7 +905,7 @@ ScreenSaverWindow::ScreenSaverWindow()
 	fPasswordWindow->Run();
 
 	// Create the tab view
-	fTabView = new BTabView("tab_view", B_WIDTH_FROM_LABEL);
+	fTabView = new TabView();
 	fTabView->SetBorder(B_NO_BORDER);
 
 	// Create the controls inside the tabs

src/preferences/screensaver/ScreenSaverWindow.h

@@ -20,10 +20,10 @@
 
 class BMessage;
 class BRect;
-class BTabView;
 
 class FadeView;
 class ModulesView;
+class TabView;
 
 
 class ScreenSaverWindow : public BDirectWindow {
@@ -47,7 +47,7 @@ private:
 
 			FadeView*			fFadeView;
 			ModulesView*		fModulesView;
-			BTabView*			fTabView;
+			TabView*			fTabView;
 };