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docs: Mention popovers in the migration guide

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Things have changed around popovers, we should mention
that.
This commit is contained in:
Matthias Clasen 2021-09-28 15:47:06 -04:00
parent 2c9a2e94c8
commit 83b434d6a5
1 changed files with 12 additions and 0 deletions
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docs/reference/gtk/migrating-3to4.md
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@ -1332,6 +1332,18 @@ pointer coordinates as inout arguments any more, but as normal in ones.
See: [method@Gtk.TreeView.get_tooltip_context], [method@Gtk.IconView.get_tooltip_context]
### Adapt to GtkPopover changes
In GTK 3, a `GtkPopover` could be attached to any widget, using the `relative-to`
property. This is no longer possible in GTK 4. The parent widget has to be aware
of its popover children, and manage their size allocation. Therefore, only widgets
with dedicated popover support can have them, such as [class@Gtk.MenuButton] or
[class@Gtk.PopoverMenuBar].
If you want to make a custom widget that has an attached popover, you need to call
[method@Gtk.Popover.present] in your [vfunc@Gtk.Widget.size_allocate] vfunc, in order
to update the positioning of the popover.
### Stop using GtkFileChooserButton
The `GtkFileChooserButton` widget was removed, due to its shortcomings in