Use the same approach we take for recoloring in GtkIconHelper now.
As part of this change, GtkCsSImageRecolor is changed to not derive
from GtkCssImageUrl anymore.
commit 475d916eb9 added various paths that
use theme-name for this, but the existing path already used THEME, with
a subsequent description referring to the latter. So use that everywhere
With the shader approach to symbolic recoloring, we must
not recolor the svgs anymore as we're loading them. Instead,
load them the same way that gtk-encode-symbolic-svg does.
This fixes the rendering of large symbolic icons e.g. the
'no search results found' page in the file chooser.
This is necessary because picking is no longer automatically constrained
to a widget's box. So all clipping widgets need to constrain their
clipping, too.
This patch does that for GtkViewport only.
We cannot fast-track picking by using gtk_widget_contains(). Child
widgets may extend their parent using ie negative margins.
This is not just a theoretical concern, this is what's happening right
now with GtkScale's sliders relative to the trough.
The problem is that we now iterate through all widgets, even when they
aren't anywhere near the mouse pointer. So essentially every pick
operation is now guaranteed O(N_WIDGETS) which used to be the worst case
that pretty much never happened.
The trough widgets have the slider on top of the fill level and the
hilight widget. Make sure the widget stacking respects that.
This is particularly relevant because picking event targets should pick
the slider and not the hilight widget.
In particular, allow specifying a filename for a GDK_TYPE_TEXTURE
property. This makes it easy to transition properties from Pixbuf type
to Texture type without having to touch resource files.
A sideeffect is that we don't set the correct parent window on child
widgets anymore, but that is hopefully going to be fixed once we get rid
of child windows completely.
Widgets can now set their favorite cursor using public API.
This is very necessary because all cursor-setting APIs are still
setting it on their GdkWindow, which by now is the toplevel - oops.
Change constructors to reflect that.
While doing so, also add a fallback argument to the cursor constructors,
so it is now possible to create cursors with fallback.
The check used to achieve discarding events not meant for the window
widget itself (because they are handled in the regular paths). Using
the target widget is the equivalent now.
Use g_value_set/get_boxed() in gtk_window_get/set_property(), case PROP_ICON.
icon_from_list() shall always add a reference to the returned icon.
gtk_window_set_icon() must accept icon != NULL.
https://bugzilla.gnome.org/show_bug.cgi?id=789870
