After removing elements, there were a few cases where the tree wasn't
properly balanced which could further down violate assumptions about the
layout.
Attached is the original testcase that triggered it. I didn't bother
simplifying it.
Up until now when allocating the child it only used the natural size
while the measuring also used the minimum size, resulting in a clipped
child when animating if the child had different minimum size and
natural size. This was an obvious case when using labels that had
ellipsization.
This commit gives full allocation to the child by inverting the size
the revealer reduces from its animation progress.
Code done by Benjamin Otte.
Closes: https://gitlab.gnome.org/GNOME/gtk/issues/635
The complexity with model items vs row items is really confusing. Add to
that treelistmodel position vs child model position vs parent position,
and you're so confused, even the best naming can't help.
And once you're there, consider passthrough vs non-passthrough...
When passthrough is enabled, it should return the GType
of the child GListModels; when disabled, it should be
GTK_TYPE_TREE_LIST_ROW.
The conditions are inverted however, causing a few
warnings to trigger.
Fix that by returning the correct GType.
This model just takes an object and a property name and recursively
looks it up. In particular, I want it for:
widget, widget.parent, widget.parent.parent, ...
The code gets rid of the GtkTreeView and replaces it with a GtkListBox.
Most of the logic is now done via GListModel subclasses.
A big change is that this new list is now tracking updates itself and
doesn't need to be manually updated. All code that used to cause rescans
or add forgotten objects to the tree has been removed.
If objects are missing from the object tree, the logic for tracking them
needs to be added.
This patch does multiple things:
1. Add a custom persistent per-row object.
2. Move all per-row API to that object. This means notifications are now
possible.
3. Add a "passthrough" construct-only property to the TreeListModel that
influences if the model returns these new object or passes through
the ones from the model.
This greatly simplifies the code needed to be written for widgetry,
because one can just connect the per-row object to the expanders that
expand and collapse rows.
As an added power feature, these objects can also be passed through
further models (like filter models).
It also adds kind of a hack to Adwaita to make the test look neat.
Let separators be declared as sidebars to have the same style as those
drawn by GtkStackSidebar. This also let them handle the selection-mode
class, whether they are assigned it or they descend from something in
selection mode.
Also drop setting the selection mode color for non-sidebar separators.
This is convenient when building a custom sidebar using a GtkSeparator
and to extend a sidebar to the title bar.
This is needed to work around headerbar sliding animation issues without
refactoring Adwaita's support of titlebars and headerbars as it may
break applications.
https://gitlab.gnome.org/GNOME/gtk/issues/1264
This step was missed before, again.
SASS 3.6 emits rgba(0, 0, 0, 0) instead of transparent, so it wants to
change those too, but that patch was only committed in March and isn't
being backported to the previous stable, so I don't know if others'
versions will do the same - so until it's shown that anyone else (A) is
regenerating CSS and (B) also has 3.6, I'm skipping those changes. See:
c287f312ac
