Since "->adjust_size_request()" was added, it became important for GtkBin's
generic height-for-width implementation to further check the requests
using this vfunc.
of limiting it to it's minimum size.
This fixes height-for-width labels inside a GtkCheckButton, for some
reason GtkCheckButton was limiting the child allocation to the child's
minimum request, probably for the sake of virtual left-alignment of
the child label to be beside the checkmark. This should be done by
other means if nescesarry.
For "padding" cases, it would be ok to fallback on GtkBin class
implementation of height-for-width. However in cases where the
user set's an xscale/yscale the GtkAlignment needs to take care
of properly adjusting the for_size when querying it's child.
Checks were in place to ensure that widgets never request taller
or wider than screen size. This was there to test a theory about
scrolled window children functioning correctly with dynamic content
however it breaks GtkViewport children which can generally return a
value taller than screen height intentionally, GtkViewport uses this
value to update the adjustments.
The functions to set frames on windows stopped being interesting
when the linux framebuffer port was dropped, many years ago.
Similar functionality may come back with client-side decorations
in the future.
Usually pango_layout_get_pixel_extents() is used, which uses
PANGO_PIXELS_CEIL on the rectangle's width. This commit makes the new
function gtk_cell_renderer_text_get_preferred_width() consistent with
this.
This fixes rounding errors on Mac OS X, where we were seeing tree views
with a double height for a single line of text, while the usual single
row height would have been sufficient.
