Add GtkFontDialogButton

This is like GtkColorDialogButton, but for fonts.

gtk/gtk.h

@@ -138,6 +138,7 @@
 #include <gtk/gtkfontchooserdialog.h>
 #include <gtk/gtkfontchooserwidget.h>
 #include <gtk/gtkfontdialog.h>
+#include <gtk/gtkfontdialogbutton.h>
 #include <gtk/gtkframe.h>
 #include <gtk/gtkgesture.h>
 #include <gtk/gtkgestureclick.h>

gtk/gtkfontdialogbutton.h

@@ -0,0 +1,112 @@
+/*
+ * GTK - The GIMP Toolkit
+ * Copyright (C) 2022 Red Hat, Inc.
+ * All rights reserved.
+ *
+ * This Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
+#error "Only <gtk/gtk.h> can be included directly."
+#endif
+
+#include <gtk/gtkbutton.h>
+#include <gtk/gtkfontdialog.h>
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_FONT_DIALOG_BUTTON (gtk_font_dialog_button_get_type ())
+
+GDK_AVAILABLE_IN_4_10
+G_DECLARE_FINAL_TYPE (GtkFontDialogButton, gtk_font_dialog_button, GTK, FONT_DIALOG_BUTTON, GtkWidget)
+
+GDK_AVAILABLE_IN_4_10
+GtkWidget *      gtk_font_dialog_button_new              (GtkFontDialog       *dialog);
+
+GDK_AVAILABLE_IN_4_10
+GtkFontDialog *  gtk_font_dialog_button_get_dialog       (GtkFontDialogButton *self);
+
+GDK_AVAILABLE_IN_4_10
+void             gtk_font_dialog_button_set_dialog       (GtkFontDialogButton *self,
+                                                          GtkFontDialog       *dialog);
+
+/**
+ * GtkFontLevel:
+ * @GTK_FONT_LEVEL_FAMILY: Select a font family
+ * @GTK_FONT_LEVEL_FACE: Select a font face (i.e. a family and a style)
+ * @GTK_FONT_LEVEL_FONT: Select a font (i.e. a face with a size, and possibly font variations)
+ * @GTK_FONT_LEVEL_FEATURES: Select a font and font features
+ *
+ * The level of granularity for the font selection.
+ *
+ * Depending on this value, the `PangoFontDescription` that
+ * is returned by [method@Gtk.FontDialogButton.get_font_desc]
+ * will have more or less fields set.
+ */
+typedef enum
+{
+  GTK_FONT_LEVEL_FAMILY,
+  GTK_FONT_LEVEL_FACE,
+  GTK_FONT_LEVEL_FONT,
+  GTK_FONT_LEVEL_FEATURES
+} GtkFontLevel;
+
+GDK_AVAILABLE_IN_4_10
+GtkFontLevel     gtk_font_dialog_button_get_level        (GtkFontDialogButton *self);
+
+GDK_AVAILABLE_IN_4_10
+void             gtk_font_dialog_button_set_level        (GtkFontDialogButton *self,
+                                                          GtkFontLevel         level);
+
+GDK_AVAILABLE_IN_4_10
+PangoFontDescription *
+                 gtk_font_dialog_button_get_font_desc    (GtkFontDialogButton *self);
+
+GDK_AVAILABLE_IN_4_10
+void             gtk_font_dialog_button_set_font_desc    (GtkFontDialogButton        *self,
+                                                          const PangoFontDescription *font_desc);
+
+GDK_AVAILABLE_IN_4_10
+const char *     gtk_font_dialog_button_get_font_features
+                                                         (GtkFontDialogButton *self);
+
+GDK_AVAILABLE_IN_4_10
+void             gtk_font_dialog_button_set_font_features
+                                                         (GtkFontDialogButton  *self,
+                                                          const char           *font_features);
+
+GDK_AVAILABLE_IN_4_10
+PangoLanguage *  gtk_font_dialog_button_get_language     (GtkFontDialogButton *self);
+
+GDK_AVAILABLE_IN_4_10
+void             gtk_font_dialog_button_set_language     (GtkFontDialogButton  *self,
+                                                          PangoLanguage        *language);
+
+GDK_AVAILABLE_IN_4_10
+gboolean         gtk_font_dialog_button_get_use_font     (GtkFontDialogButton *self);
+
+GDK_AVAILABLE_IN_4_10
+void             gtk_font_dialog_button_set_use_font     (GtkFontDialogButton  *self,
+                                                          gboolean              use_font);
+
+GDK_AVAILABLE_IN_4_10
+gboolean         gtk_font_dialog_button_get_use_size     (GtkFontDialogButton *self);
+
+GDK_AVAILABLE_IN_4_10
+void             gtk_font_dialog_button_set_use_size     (GtkFontDialogButton  *self,
+                                                          gboolean              use_size);
+
+G_END_DECLS

gtk/meson.build

@@ -241,6 +241,7 @@ gtk_public_sources = files([
   'gtkfontchooserutils.c',
   'gtkfontchooserwidget.c',
   'gtkfontdialog.c',
+  'gtkfontdialogbutton.c',
   'gtkframe.c',
   'gtkgesture.c',
   'gtkgesturedrag.c',
@@ -500,6 +501,7 @@ gtk_public_headers = files([
   'gtkfontchooserdialog.h',
   'gtkfontchooserwidget.h',
   'gtkfontdialog.h',
+  'gtkfontdialogbutton.h',
   'gtkframe.h',
   'gtkgesture.h',
   'gtkgesturedrag.h',

testsuite/gtk/defaultvalue.c

@@ -451,6 +451,10 @@ G_GNUC_END_IGNORE_DEPRECATIONS
           strcmp (pspec->name, "rgba") == 0)
         check = FALSE;
 
+      if (g_type_is_a (type, GTK_TYPE_FONT_DIALOG_BUTTON) &&
+          strcmp (pspec->name, "font-desc") == 0)
+        check = FALSE;
+
       if (g_type_is_a (type, GTK_TYPE_FONT_DIALOG) &&
           strcmp (pspec->name, "language") == 0)
         check = FALSE;