GtkButtonBox adds the "linked" class to its style context when its
layout is set to GTK_BUTTONBOX_EXPAND. It shouldn't ever make sense to
have spacing between buttons in that case, as themes generally draw
linked elements with a continuous border.
Thus, always set spacing to 0 and ignore GtkDialog's button-spacing
style property when the layout is set to EXPAND.
Also remove the now-redundant css rules which set button-spacing to 0
for message dialogs.
https://bugzilla.gnome.org/show_bug.cgi?id=752131
gtk_widget_preferred_size() is only useful if you want to quickly port a
widget from GTK2 sizing code to GTK3 but does not properly work with
height-for-width as used in GTK. So we don't want to encourage people to
use it. In particular we want people to convert to height-for-width
before adding baseline support to their widgets.
Stop documenting the base class as just a base class for the
H and V specializations, copying the useful descriptions from
those H/V classes to the base class. Do not advise the use of
the H/V classes or refer to them unnecessarily.
and let GtkContainer do the job; fixes doubled border widths. GtkBox
did already delegate border handling to Gtkcontainer, which interacted
badly with a subclass that didn't.
GtkButtonBox doesn't do height-for-width, therefore we should
explicitly set these methods to NULL instead of hoping that the
inherited GtkBox implementations work ok.
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".
If a child is too large (> 1.5 the average), let it have its own
size. The old behaviour of fully homogeneous button boxes can still
be had by setting the homogeneous property to TRUE. Bug 84188.
There were some vestiges of the gtk_{h,v}button_box_set_default_layout()
functionality left. These are gone now. I have also removed
the GTK_BUTTONBOX_DEFAULT value in GtkButtonBoxStyle, but the other
values have been kept at their numeric values, to avoid more serious
ABI change.
