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-rw-r--r--widgets/misc/e-menu-tool-button.c183
1 files changed, 183 insertions, 0 deletions
diff --git a/widgets/misc/e-menu-tool-button.c b/widgets/misc/e-menu-tool-button.c
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+++ b/widgets/misc/e-menu-tool-button.c
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+/*
+ * e-menu-tool-button.c
+ *
+ * This program 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) version 3.
+ *
+ * This program 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 the program; if not, see <http://www.gnu.org/licenses/>
+ *
+ *
+ * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
+ *
+ */
+
+#include "e-menu-tool-button.h"
+
+static gpointer parent_class;
+
+static GtkWidget *
+menu_tool_button_clone_image (GtkWidget *source)
+{
+ GtkIconSize size;
+ GtkImageType image_type;
+ const gchar *icon_name;
+
+ /* XXX This isn't general purpose because it requires that the
+ * source image be using a named icon. Somewhat surprised
+ * GTK+ doesn't offer something like this. */
+ image_type = gtk_image_get_storage_type (GTK_IMAGE (source));
+ g_return_val_if_fail (image_type == GTK_IMAGE_ICON_NAME, NULL);
+ gtk_image_get_icon_name (GTK_IMAGE (source), &icon_name, &size);
+
+ return gtk_image_new_from_icon_name (icon_name, size);
+}
+
+static GtkMenuItem *
+menu_tool_button_get_first_menu_item (GtkMenuToolButton *menu_tool_button)
+{
+ GtkWidget *menu;
+ GList *children;
+
+ menu = gtk_menu_tool_button_get_menu (menu_tool_button);
+ if (!GTK_IS_MENU (menu))
+ return NULL;
+
+ /* XXX GTK+ 2.12 provides no accessor function. */
+ children = GTK_MENU_SHELL (menu)->children;
+ if (children == NULL)
+ return NULL;
+
+ return GTK_MENU_ITEM (children->data);
+}
+
+static void
+menu_tool_button_update_button (GtkToolButton *tool_button)
+{
+ GtkMenuItem *menu_item;
+ GtkMenuToolButton *menu_tool_button;
+ GtkImageMenuItem *image_menu_item;
+ GtkAction *action;
+ GtkWidget *image;
+ gchar *tooltip = NULL;
+
+ menu_tool_button = GTK_MENU_TOOL_BUTTON (tool_button);
+ menu_item = menu_tool_button_get_first_menu_item (menu_tool_button);
+ if (!GTK_IS_IMAGE_MENU_ITEM (menu_item))
+ return;
+
+ image_menu_item = GTK_IMAGE_MENU_ITEM (menu_item);
+ image = gtk_image_menu_item_get_image (image_menu_item);
+ if (!GTK_IS_IMAGE (image))
+ return;
+
+ image = menu_tool_button_clone_image (image);
+ gtk_tool_button_set_icon_widget (tool_button, image);
+ gtk_widget_show (image);
+
+ /* If the menu item is a proxy for a GtkAction, extract
+ * the action's tooltip and use it as our own tooltip. */
+ action = gtk_activatable_get_related_action (
+ GTK_ACTIVATABLE (menu_item));
+ if (action != NULL)
+ g_object_get (action, "tooltip", &tooltip, NULL);
+ gtk_widget_set_tooltip_text (GTK_WIDGET (tool_button), tooltip);
+ g_free (tooltip);
+}
+
+static void
+menu_tool_button_size_request (GtkWidget *widget,
+ GtkRequisition *requisition)
+{
+ gint minimum_width;
+
+ /* Chain up to parent's size_request() method. */
+ GTK_WIDGET_CLASS (parent_class)->size_request (widget, requisition);
+
+ /* XXX This is a hack. This widget is only used for the New
+ * button in the main window toolbar. The New button is
+ * pretty important, but the word "New" is pretty short
+ * (in English, anyway) and this results in a small screen
+ * target when using a "text below item" toolbar style.
+ *
+ * We can't go hard-coding a width, but we -can- use a
+ * heuristic based on the toolbar button height. */
+ minimum_width = requisition->height * 2;
+ requisition->width = MAX (minimum_width, requisition->width);
+}
+
+static void
+menu_tool_button_clicked (GtkToolButton *tool_button)
+{
+ GtkMenuItem *menu_item;
+ GtkMenuToolButton *menu_tool_button;
+
+ menu_tool_button = GTK_MENU_TOOL_BUTTON (tool_button);
+ menu_item = menu_tool_button_get_first_menu_item (menu_tool_button);
+
+ if (GTK_IS_MENU_ITEM (menu_item))
+ gtk_menu_item_activate (menu_item);
+}
+
+static void
+menu_tool_button_class_init (EMenuToolButtonClass *class)
+{
+ GtkWidgetClass *widget_class;
+ GtkToolButtonClass *tool_button_class;
+
+ parent_class = g_type_class_peek_parent (class);
+
+ widget_class = GTK_WIDGET_CLASS (class);
+ widget_class->size_request = menu_tool_button_size_request;
+
+ tool_button_class = GTK_TOOL_BUTTON_CLASS (class);
+ tool_button_class->clicked = menu_tool_button_clicked;
+}
+
+static void
+menu_tool_button_init (EMenuToolButton *button)
+{
+ g_signal_connect (
+ button, "notify::menu",
+ G_CALLBACK (menu_tool_button_update_button), NULL);
+}
+
+GType
+e_menu_tool_button_get_type (void)
+{
+ static GType type = 0;
+
+ if (G_UNLIKELY (type == 0)) {
+ const GTypeInfo type_info = {
+ sizeof (EMenuToolButtonClass),
+ (GBaseInitFunc) NULL,
+ (GBaseFinalizeFunc) NULL,
+ (GClassInitFunc) menu_tool_button_class_init,
+ (GClassFinalizeFunc) NULL,
+ NULL, /* class_data */
+ sizeof (EMenuToolButton),
+ 0, /* n_preallocs */
+ (GInstanceInitFunc) menu_tool_button_init,
+ NULL /* value_table */
+ };
+
+ type = g_type_register_static (
+ GTK_TYPE_MENU_TOOL_BUTTON, "EMenuToolButton",
+ &type_info, 0);
+ }
+
+ return type;
+}
+
+GtkToolItem *
+e_menu_tool_button_new (const gchar *label)
+{
+ return g_object_new (E_TYPE_MENU_TOOL_BUTTON, "label", label, NULL);
+}