Center the OpenWindow. The problem is that we cannot get the real size of the window before it's actually shown on screen.. the trick I did was to show it offscreen, get the real size and move the window.

Fixes ticket #4236


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32410 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/diskprobe/OpenWindow.cpp

@@ -57,12 +57,22 @@ OpenWindow::OpenWindow()
 		.Add(probeDeviceButton, 2, 1)
 		.SetInsets(8, 8, 8, 8)
 	);
-
-	// TODO: This does not center the window, since with layout management,
-	// the window will still have an invalid size at this point.
 	BScreen screen(this);
-	MoveTo(screen.Frame().left + (screen.Frame().Width() - Frame().Width()) / 2,
+	// move the window offscreen..
-		screen.Frame().top + (screen.Frame().Height() - Frame().Height()) / 2);
+	MoveTo(screen.Frame().right+20, screen.Frame().top);
+	fCentered = true;
+}
+
+
+void
+OpenWindow::FrameResized(float width, float height)
+{
+	if (fCentered) {
+		BScreen screen(this);
+		MoveTo(screen.Frame().left + (screen.Frame().Width() - width) / 2,
+			screen.Frame().top + (screen.Frame().Height() - height) / 2);
+	}
+	fCentered = false;
 }
 
 

src/apps/diskprobe/OpenWindow.h

@@ -20,11 +20,14 @@ public:
 	virtual	void				MessageReceived(BMessage* message);
 	virtual	bool				QuitRequested();
 
+	virtual void				FrameResized(float width, float height);
+
 	static	void				CollectDevices(BMenu* menu,
 									BEntry* startEntry = NULL);
 
 private:
 			BMenu*				fDevicesMenu;
+			bool				fCentered;
 };
 
 #endif	/* OPEN_WINDOW_H */