Add GtkPopoverMenu

GtkPopoverMenu is a GtkPopover subclass that has a menu-like stack
built-in.

1 files changed, 266 insertions, 0 deletions

diff --git a/gtk/gtkpopovermenu.c b/gtk/gtkpopovermenu.c
new file mode 100644
index 0000000000..fadb95cb6c
--- /dev/null
+++ b/gtk/gtkpopovermenu.c
@@ -0,0 +1,266 @@
+/* GTK - The GIMP Toolkit
+ * Copyright © 2014 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+#include "gtkpopovermenu.h"
+#include "gtkstack.h"
+#include "gtkbox.h"
+#include "gtkintl.h"
+
+
+struct _GtkPopoverMenu
+{
+  GtkPopover parent_instance;
+};
+
+enum {
+  CHILD_PROP_SUBMENU = 1
+};
+
+G_DEFINE_TYPE (GtkPopoverMenu, gtk_popover_menu, GTK_TYPE_POPOVER)
+
+static void
+gtk_popover_menu_ensure_stack (GtkPopoverMenu *popover)
+{
+  GtkWidget *stack;
+
+  stack = gtk_stack_new ();
+  gtk_stack_set_vhomogeneous (GTK_STACK (stack), FALSE);
+  gtk_stack_set_transition_type (GTK_STACK (stack), GTK_STACK_TRANSITION_TYPE_SLIDE_LEFT_RIGHT);
+  gtk_widget_show (stack);
+  gtk_container_add (GTK_CONTAINER (popover), stack);
+}
+
+static GtkWidget *
+gtk_popover_menu_ensure_submenu (GtkPopoverMenu *popover,
+                                 const gchar    *name)
+{
+  GtkWidget *stack;
+  GtkWidget *submenu;
+
+  stack = gtk_bin_get_child (GTK_BIN (popover));
+  submenu = gtk_stack_get_child_by_name (GTK_STACK (stack), name);
+  if (submenu == NULL)
+    {
+      submenu = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+      gtk_widget_set_halign (submenu, GTK_ALIGN_FILL);
+      g_object_set (submenu, "margin", 10, NULL);
+      gtk_widget_show (submenu);
+      gtk_stack_add_named (GTK_STACK (stack), submenu, name);
+    }
+
+  return submenu;
+}
+
+static void
+gtk_popover_menu_set_submenu (GtkPopoverMenu *popover,
+                              GtkWidget      *child,
+                              const gchar    *name)
+{
+  const gchar *old_name;
+  GtkWidget *submenu;
+
+  old_name = g_object_get_data (G_OBJECT (child), "GtkPopoverMenu:submenu");
+
+  if (g_strcmp0 (old_name, name) == 0)
+    return; 
+  
+  submenu = gtk_popover_menu_ensure_submenu (popover, name);
+
+  g_object_ref (child);
+  gtk_container_remove (GTK_CONTAINER (gtk_widget_get_parent (child)), child);
+  gtk_container_add (GTK_CONTAINER (submenu), child);
+  g_object_unref (child);
+
+  g_object_set_data_full (G_OBJECT (child), "GtkPopoverMenu:submenu", g_strdup (name), g_free);
+
+  gtk_container_child_notify (GTK_CONTAINER (popover), child, "submenu");
+}
+
+static const gchar *
+gtk_popover_menu_get_submenu (GtkPopoverMenu *popover,
+                              GtkWidget      *child)
+{
+  return (const gchar *)g_object_get_data (G_OBJECT (child), "GtkPopoverMenu:submenu");
+}
+
+static void
+gtk_popover_menu_add_item (GtkPopoverMenu *popover,
+                           GtkWidget      *item)
+{
+  const gchar *name;
+  GtkWidget *submenu;
+
+  name = gtk_popover_menu_get_submenu (popover, item);
+  if (name == NULL)
+    name = "main";
+
+  submenu = gtk_popover_menu_ensure_submenu (popover, name);
+  gtk_container_add (GTK_CONTAINER (submenu), item);
+}
+
+static void
+gtk_popover_menu_remove_item (GtkPopoverMenu *popover,
+                              GtkWidget      *item)
+{
+  const gchar *name;
+  GtkWidget *submenu;
+  GList *children;
+
+  name = gtk_popover_menu_get_submenu (popover, item);
+  if (name == NULL)
+    name = "main";
+
+  submenu = gtk_popover_menu_ensure_submenu (popover, name);
+
+  g_assert (submenu == gtk_widget_get_parent (item));
+  gtk_container_remove (GTK_CONTAINER (submenu), item);
+
+  children = gtk_container_get_children (GTK_CONTAINER (submenu));
+  if (children == NULL)
+    gtk_container_remove (GTK_CONTAINER (gtk_bin_get_child (GTK_BIN (popover))), submenu);
+  else
+    g_list_free (children);
+}
+
+static void
+gtk_popover_menu_init (GtkPopoverMenu *popover)
+{
+  gtk_popover_menu_ensure_stack (popover);
+  gtk_popover_menu_ensure_submenu (popover, "main");
+}
+
+static void
+back_to_main (GtkWidget *popover)
+{
+  GtkWidget *stack;
+
+  stack = gtk_bin_get_child (GTK_BIN (popover));
+  gtk_stack_set_visible_child_name (GTK_STACK (stack), "main");
+}
+
+static void
+gtk_popover_menu_map (GtkWidget *widget)
+{
+  GTK_WIDGET_CLASS (gtk_popover_menu_parent_class)->map (widget);
+  back_to_main (widget);
+}
+
+static void
+gtk_popover_menu_unmap (GtkWidget *widget)
+{
+  back_to_main (widget);
+  GTK_WIDGET_CLASS (gtk_popover_menu_parent_class)->unmap (widget);
+}
+
+static void
+gtk_popover_menu_add (GtkContainer *container,
+                      GtkWidget    *child)
+{
+
+  if (!gtk_bin_get_child (GTK_BIN (container)))
+    {
+      gtk_widget_set_parent (child, GTK_WIDGET (container));
+      _gtk_bin_set_child (GTK_BIN (container), child);
+    }
+  else
+    gtk_popover_menu_add_item (GTK_POPOVER_MENU (container), child);
+}
+
+static void
+gtk_popover_menu_remove (GtkContainer *container,
+                         GtkWidget    *child)
+{
+  if (child == gtk_bin_get_child (GTK_BIN (container)))
+    GTK_CONTAINER_CLASS (gtk_popover_menu_parent_class)->remove (container, child);
+  else
+    gtk_popover_menu_remove_item (GTK_POPOVER_MENU (container), child);
+}
+
+static void
+gtk_popover_menu_get_child_property (GtkContainer *container,
+                                     GtkWidget    *child,
+                                     guint         property_id,
+                                     GValue       *value,
+                                     GParamSpec   *pspec)
+{
+  if (child == gtk_bin_get_child (GTK_BIN (container)))
+    return;
+
+  switch (property_id)
+ 
+    {
+    case CHILD_PROP_SUBMENU:
+      g_value_set_string (value, gtk_popover_menu_get_submenu (GTK_POPOVER_MENU (container), child));
+      break;
+
+    default:
+      GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec); 
+      break;
+    }
+}
+
+static void
+gtk_popover_menu_set_child_property (GtkContainer *container,
+                                     GtkWidget    *child,
+                                     guint         property_id,
+                                     const GValue *value,
+                                     GParamSpec   *pspec)
+{
+  if (child == gtk_bin_get_child (GTK_BIN (container)))
+    return;
+
+  switch (property_id)
+    {
+    case CHILD_PROP_SUBMENU:
+      gtk_popover_menu_set_submenu (GTK_POPOVER_MENU (container), child, g_value_get_string (value));
+      break;
+
+    default:
+      GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec); 
+      break;
+    }
+}
+
+static void
+gtk_popover_menu_class_init (GtkPopoverMenuClass *klass)
+{
+  GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+  widget_class->map = gtk_popover_menu_map;
+  widget_class->unmap = gtk_popover_menu_unmap;
+
+  container_class->add = gtk_popover_menu_add;
+  container_class->remove = gtk_popover_menu_remove;
+  container_class->set_child_property = gtk_popover_menu_set_child_property;
+  container_class->get_child_property = gtk_popover_menu_get_child_property;
+
+  gtk_container_class_install_child_property (container_class,
+                                              CHILD_PROP_SUBMENU,
+                                              g_param_spec_string ("submenu",
+                                                                   P_("Submenu"),
+                                                                   P_("The name of the submenu to place this child in"),
+                                                                   NULL,
+                                                                   G_PARAM_READWRITE));
+}
+
+GtkWidget *
+gtk_popover_menu_new (void)
+{
+  return g_object_new (GTK_TYPE_POPOVER_MENU, NULL);
+}