[Patch] GTK2: TGtk2WidgetSet.GetWindowRect() returns wrong origin of an invisible TForm

Original Reporter info from Mantis: biloky @biloky

• Reporter name: Joeny Ang

Description:

TGtk2WidgetSet.GetWindowRect() returns wrong origin of an invisible TForm if a TLabel is inside a TPanel or TRadioGroup.

gdk_window_get_origin() returns an invalid TPoint if the widget is invisible. If a TLabel is inside a TPanel on the TForm, Widget^.window "somehow" gets initialized, thus the check "not GDK_IS_WINDOW(Widget^.window)" will be FALSE and this will skip the size initialization workaround.

Steps to reproduce:

Using the test project, the form is supposed to be screen centered.
Without the TLabel, the form is properly centered.

Mantis conversion info:

• Mantis ID: 37414
• Build: trunk
• Version: 2.1 (SVN)
• Fixed in revision: r63641 (#5fa1cdcf)