Fixes #156

They are deprecated in gtk.

* gdk/src/graphene_*.hg:
* gdk/src/rgba.hg:
* gtk/src/border.hg: Add TODO comments.
These classes will be more efficient if they contain the underlying
C structs instead of pointers to the C structs.
See #155

* configure.ac:
* meson.build: Require gtk4 >= 4.14.0.
* gdk/src/display.hg: Add supports_shadow_width(), property_shadow_width().
* gdk/src/dmabufformats.hg: Add equal().
* gdk/src/monitor.hg: Add get/property_scale().
* gtk/gtkmm.h:
* gtk/gtkmm/meson.build:
* gtk/src/filelist.am: Add accessibletext.
* gtk/src/accessibletext.[ccg|hg]: New files.
* gtk/src/accessible.hg: Add announce().
* gtk/src/calendar.hg: Add set/get_day(), set/get_month(), set/get_year().
* gtk/src/inscription.hg:
* gtk/src/label.hg:
* gtk/src/text.hg:
* gtk/src/textview.hg: Add a TODO comment.
* gtk/src/scalebutton.hg: Add set/get/property_has_frame().
* gtk/src/searchentry.hg: Add _IGNORE() and _IGNORE_PROPERTY() directives.
* gtk/src/searchentry2.hg: Add set/get/property_input_purpose(),
set/get/property_input_hints().
* tools/m4/convert_gdk.m4: Add conversion for DmabufFormats.
* tools/m4/convert_gtk.m4: Add converions for AccessibleAnnouncementPriority,
AccessibleTextContentChange, AccessibleTextGranularity enums.

using gtk files from gtk 4.14.0. Update gtk_vfuncs.defs.

https://discourse.gnome.org/t/how-shall-action-signals-be-handled-in-language-bindings/19585

Fix the window which is opened when the button is clicked.

* configure.ac:
* meson.build: Require gtk4 >= 4.13.6.
* gtk/src/aboutdialog.hg: GTK_LICENSE_0BSD is called BSD_0.
* gtk/src/filelauncher.hg: Add get/set/property_writable().
* gtk/src/settings.hg: Add property_gtk_show_status_shapes().
* gtk/src/spinbutton.hg: Add get/set/property_activates_default().

using gtk files from gtk 4.13.6.
Update gdk_docs_override.xml and gtk_docs_override.xml.

Make it similar to the description of GtkScrolledWindow.

* tools/m4/enum.m4: New file. Basically a copy of glibmm's
corresponding file. It adds constexpr to operator|(), operator&(),
operator^() and operator~() for enums of flag type.
* tools/extra_defs_gen/meson.build:
* tools/m4/filelist.am: Add enum.m4.

Fixes #153

* configure.ac:
* meson.build: Require gtk4 >= 4.13.3.
* gtk/gtkmm/meson.build:
* gtk/src/filelist.am: Add graphicsoffload.
* gtk/src/enums.hg: Add enum GraphicsOffloadEnabled.
* gtk/src/graphicsoffload.[ccg|hg]: New files.
* gtk/src/video.hg: Add get/set/property_graphics_offload().
* tools/m4/convert_gtk.m4: Add conversions for GraphicsOffloadEnabled.

using gtk files from gtk 4.13.3. Update gtk_docs_override.xml
and tools/extra_defs_gen/generate_defs_gtk.cc.

From the documentation of gtk_window_new():
  Due to GTK keeping a reference to the window internally,
  gtk_window_new() does not return a reference to the caller.

GtkWindow acts approximately like a method marked (transfer none).
The Gtk::Window constructors shall take a reference in order to avoid
premature deletion of the GtkWindow, if it's destroyed, e.g. when
it's closed.

Fixes #151

TreeIter: Donʼt return dangling ref on *rvalueIter

See merge request !90

!88 (comment 1908596) &c

See !88

Add SearchEntry2, deprecate SearchEntry

Closes #148

See merge request !86

tests/tree_model_iterator: Fix CRITICALs as !model

See merge request !89

get_added(), get_modified(), get_visited() and get_application_info()
return a Glib::DateTime. GtkRecentInfo returns the GDateTime with
(transfer none). The RecentInfo methods must add their own reference.
Fixes #150

Make it more immune to possible future added values.

See !87

Kjell noticed at line 118 and the others creating paths from iterators:

> Gtk-CRITICAL **: 10:21:51.432: gtk_tree_model_get_path:
>   assertion 'GTK_IS_TREE_MODEL (tree_model)' failed

These criticals were because the paths were created from iterators not
associated with a model. Make them use the same 'dummy' model as others.

!88 (comment 1907963)

meson.build—Donʼt fail if warning_level=everything

See merge request !87

tests/tree_model_iterator: Fix/add const+non tests

See merge request !88

instead of SearchEntry2. SearchEntry2 does not need a derived GType.

* Rename test_const_conversion() to _comparison() as that's what it does

* Rename test_assignment_from_const() to _to_const(), ditto - & fix that
  not actually comparing the 2 different constness types, by using auto!

* Make latter actually test assignment; it was only trying construction…

* Make latter test that operator=() returns *this, per my recent bugfix!

* Add real _from_const(), which static_asserts !constructible/assignable

* Add test_operator_bool()

* Add a basic model so we can check bool/equality after construction and
  assignment when we have a model, not only for empty/invalid iterators,
  since checking we are STILL empty doesnʼt confirm the operation worked

We assume the meson configure variable warning_level can always be
converted to int, but nowadays there is a standard 'everything' option,
which if used was causing `ninja` builds to fail. While that level is
not very useful due to all the dodgy C stuff we are built on top of, it
should still work in case anyone wants to test particular files under it
– so this fixes it, by changing 'everything' to the arbitrarily high 99.

This is of course wrong and was causing crashes in the Inkscape GTK/mm4
porting effort, luckily now worked around by refactoring relevant code.

Widget: Add [[nodiscard]] on get_children() and...

See merge request !85

...drop some more redundant Gtk:: namespace qualifications there, and
avoid introducing a template typename ambiguously also called Widget.

!85

SearchEntry wrongly inherits from Entry. GtkSearchEntry does not
inherit from GtkEntry in gtk4. SearchEntry can't be fixed without
breaking ABI.

* demos/gtk-demo/example_iconbrowser.cc: Use SearchEntry2.
* demos/gtk-demo/main.cc: Call Application::wrap_in_search_entry2().
* gtk/gtkmm.h:
* gtk/gtkmm/meson.build:
* gtk/src/filelist.am: Add searchentry2.
* gtk/src/application.[ccg|hg]: Add wrap_in_search_entry2().
* gtk/src/searchentry.hg: Deprecate in favor of SearchEntry2.
* gtk/src/searchentry2.[ccg|hg]: New files.

Fixes #148