Fix handling of the geometry widget

The geometry widget feature of gtk_window_set_geometry_hints() has
never really worked right because the calculation that GTK+ did to
compute the base size of the window only worked when the geometry
widget had a larger minimum size than anything else in the window.

Setup:
* Move the GtkSizeGroup private functions to a new private header
  gtksizegroup-private.h
* Add the possibilty to pass flags to _gtk_size_group_queue_resize(),
  with the flag GTK_QUEUE_RESIZE_INVALIDATE_ONLY to suppress adding
  the widget's toplevel to the resize queue.
* _gtk_container_resize_invalidate() is added to implement that feature
* _gtk_widget_override_size_request()/_gtk_widget_restore_size_request()
  allow temporarily forcing a large minimum size on the geometry
  widget without creating resize loops.

GtkWindow:
* Compute the extra width/height around the geometry widget
  correctly; print a warning if the computation fails.
* Always make the minimum size at least the natural minimum
  size of the toplevel; GTK+ now fails badly with underallocation.
* Always set the base size hint; we were failing to set it
  properly when the specified minimum size was overriden, but
  it's harmless to always set it.

Tests:
* New test 'testgeometry' that replaces the 'gridded geometry' test
  from testgtk. The new test is roughly similar but creates a bunch
  of windows showing different possibilities.
* The testgtk test is removed. No need to have both.

https://bugzilla.gnome.org/show_bug.cgi?id=68668

1 files changed, 9 insertions, 0 deletions

diff --git a/gtk/gtkprivate.h b/gtk/gtkprivate.h
index c0f14b4f32..d8fd0c021b 100644
--- a/gtk/gtkprivate.h
+++ b/gtk/gtkprivate.h
@@ -55,6 +55,15 @@ gboolean     _gtk_widget_get_height_request_needed (GtkWidget *widget);
 void         _gtk_widget_set_height_request_needed (GtkWidget *widget,
                                                     gboolean   height_request_needed);
 
+void _gtk_widget_override_size_request (GtkWidget *widget,
+					int        width,
+					int        height,
+					int       *old_width,
+					int       *old_height);
+void _gtk_widget_restore_size_request  (GtkWidget *widget,
+					int        old_width,
+					int        old_height);
+
 #ifdef G_OS_WIN32
 
 const gchar *_gtk_get_datadir ();