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widget: Clarify docs on gtk_widget_set_double_buffered()

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Also make them more scary so people really really don't use it as a
random knob when trying to make things go fast.

//bugzilla.gnome.org/show_bug.cgi?id=750505
This commit is contained in:
Benjamin Otte 2015-06-08 20:28:10 +02:00
parent ef93257db7
commit 1cc8de2412
1 changed files with 9 additions and 4 deletions
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13
gtk/gtkwidget.c
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@ -9336,11 +9336,16 @@ gtk_widget_get_app_paintable (GtkWidget *widget)
* pixmap will not happen automatically (as it is done in
* gdk_window_begin_paint_region()).
*
* Since 3.10 this function only works for widgets with native
* windows.
* In 3.10 GTK and GDK have been restructured for translucent drawing. Since
* then expose events for double-buffered widgets are culled into a single
* event to the toplevel GDK window. If you now unset double buffering, you
* will cause a separate rendering pass for every widget. This will likely
* cause rendering problems - in particular related to stacking - and usually
* increases rrendering times significantly.
*
* Deprecated: 3.14: This does not work under non-X11 backends,
* and it should not be used in newly written code.
* Deprecated: 3.14: This function does not work under non-X11 backends or with
* non-native windows.
* It should not be used in newly written code.
**/
void
gtk_widget_set_double_buffered (GtkWidget *widget,