Move GtkSizeRequest into GtkWidget

It doesn't make sense to keep them separate as GtkSizeRequest requires a
GtkWidget and GtkWidget implements GtkSizeRequest, so you can never have
one without the other.
It also makes the code a lot easier because no casts are required when
calling functions.

Also, the names would translate to gtk_widget_get_width() and people
agreed that this would be a too generic name, so a "preferred" was added
to the names.

So this patch moves the functions:
gtk_size_request_get_request_mode() => gtk_widget_get_request_mode()
gtk_size_request_get_width() => gtk_widget_get_preferred_width()
gtk_size_request_get_height() => gtk_widget_get_preferred_height()
gtk_size_request_get_size() => gtk_widget_get_preferred_size()
gtk_size_request_get_width_for_height() =>
  gtk_widget_get_preferred_width_for_height()
gtk_size_request_get_height_for_width() =>
  gtk_widget_get_preferred_height_for_width()
... and moves the corresponding vfuncs to the GtkWidgetClass.

The patch also renames the implementations of the vfuncs in widgets to
include the word "preferrred".

1 files changed, 1 insertions, 1 deletions

diff --git a/docs/reference/gtk/tmpl/gtkcontainer.sgml b/docs/reference/gtk/tmpl/gtkcontainer.sgml
index ea2ff059f0..3d0f2fb9e3 100644
--- a/docs/reference/gtk/tmpl/gtkcontainer.sgml
+++ b/docs/reference/gtk/tmpl/gtkcontainer.sgml
@@ -58,7 +58,7 @@ of their children.
 <para>
 The size requisition phase of the widget layout process operates top-down.
 It starts at a top-level widget, typically a #GtkWindow. The top-level widget
-asks its child for its size requisition by calling gtk_size_request_get_size().
+asks its child for its size requisition by calling gtk_size_request_get_preferred_size().
 To determine its requisition, the child asks its own children for their
 requisitions and so on. Finally, the top-level widget will get a requisition
 back from its child.