This is a hack to get around the optimizations done by the CSS engine.
The CSS engine will notice that no CSS properties changed on the
widget itself when going from one state to another and not queue
a redraw.
And the reason for no properties changing will be that only the
checkmark itself changes, but that is hidden behind a
gtk_style_context_save()/_restore() pair, so it won't be caught.
This is more for GTK developers to catch when they forgot to change
GTK_STATE_FLAGS_BITS after adding a new state flag than to prevent
widget developers from using the wrong flags.
This was a hack we added in early 3.x to allow themes to customize their
checkmarks.
Now that we want to properly support real backgrounds everywhere,
supporting this feature would cause double draws of backgrounds.
... in places where we draw a background. This was changed for GTK 3.0.0
to allow animations, but these days it doesn't make sense anymore to use
gtk_render_activity() for backgrounds.
All buttons should always be marked as :active when they are pressed.
That includes checkboxes (which are never activated in real code anyway,
so this change pretty much doesn't matter).
It doesn't make sense to support child displacement in a world where
pseudoclasses behave different from the actual displacement states.
Nobody would ever understand why a widget is displaced.
It is easily possible to simulate child displacement by using padding
CSS properties.
on:
- GtkToggleButton
- GtkCheckButton
- GtkRadioButton
- GtkModelButton
- GtkCellRendererToggle
- GtkCheckMenuItem
also update themes:
- Adwaita
- Raleigh
but not the win32 theme.
The new :checked state replaces :active for the actual checkedness of
the widgets and :active is now used exclusively while the button is being
pressed.
https://bugzilla.gnome.org/show_bug.cgi?id=733967
The font chooser constructs the display name for the font from
the family and face names. Do the same in the font button, so
we don't end up calling the same font by different names, which
would be confusing.
Instead of reconstructing a display name from the
PangoFontDescription, use the font family and face
objects, which have the original font. This lets us
get the names of fonts like Noto Sans CJK DemiLight
right, which would be shown as Noto Sans CJK SemiLight
when mangled via PangoFontDescription, since Pango
treats 'DemiLight' as an alias for the SemiLight weight.
https://bugzilla.gnome.org/show_bug.cgi?id=733832
