390 lines
10 KiB
C
390 lines
10 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) version 3.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with the program; if not, see <http://www.gnu.org/licenses/>
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*
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*
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* Authors:
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* Chris Lahey <clahey@ximian.com>
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*
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* Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <math.h>
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#include <gdk/gdkkeysyms.h>
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#include <gtk/gtk.h>
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#include <glib/gi18n.h>
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#include "e-util/e-util.h"
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#include "e-canvas.h"
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#include "e-canvas-utils.h"
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#include "e-canvas-vbox.h"
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static void e_canvas_vbox_set_property (GObject *object, guint property_id, const GValue *value, GParamSpec *pspec);
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static void e_canvas_vbox_get_property (GObject *object, guint property_id, GValue *value, GParamSpec *pspec);
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static void e_canvas_vbox_dispose (GObject *object);
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static gint e_canvas_vbox_event (GnomeCanvasItem *item, GdkEvent *event);
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static void e_canvas_vbox_realize (GnomeCanvasItem *item);
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static void e_canvas_vbox_reflow (GnomeCanvasItem *item, gint flags);
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static void e_canvas_vbox_real_add_item (ECanvasVbox *e_canvas_vbox, GnomeCanvasItem *item);
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static void e_canvas_vbox_real_add_item_start (ECanvasVbox *e_canvas_vbox, GnomeCanvasItem *item);
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static void e_canvas_vbox_resize_children (GnomeCanvasItem *item);
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enum {
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PROP_0,
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PROP_WIDTH,
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PROP_MINIMUM_WIDTH,
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PROP_HEIGHT,
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PROP_SPACING
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};
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G_DEFINE_TYPE (
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ECanvasVbox,
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e_canvas_vbox,
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GNOME_TYPE_CANVAS_GROUP)
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static void
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e_canvas_vbox_class_init (ECanvasVboxClass *class)
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{
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GObjectClass *object_class;
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GnomeCanvasItemClass *item_class;
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object_class = (GObjectClass *) class;
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item_class = (GnomeCanvasItemClass *) class;
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class->add_item = e_canvas_vbox_real_add_item;
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class->add_item_start = e_canvas_vbox_real_add_item_start;
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object_class->set_property = e_canvas_vbox_set_property;
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object_class->get_property = e_canvas_vbox_get_property;
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object_class->dispose = e_canvas_vbox_dispose;
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/* GnomeCanvasItem method overrides */
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item_class->event = e_canvas_vbox_event;
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item_class->realize = e_canvas_vbox_realize;
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g_object_class_install_property (object_class, PROP_WIDTH,
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g_param_spec_double ("width",
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"Width",
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"Width",
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0.0, G_MAXDOUBLE, 0.0,
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G_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_MINIMUM_WIDTH,
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g_param_spec_double ("minimum_width",
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"Minimum width",
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"Minimum Width",
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0.0, G_MAXDOUBLE, 0.0,
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G_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_HEIGHT,
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g_param_spec_double ("height",
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"Height",
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"Height",
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0.0, G_MAXDOUBLE, 0.0,
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G_PARAM_READABLE));
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g_object_class_install_property (object_class, PROP_SPACING,
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g_param_spec_double ("spacing",
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"Spacing",
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"Spacing",
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0.0, G_MAXDOUBLE, 0.0,
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G_PARAM_READWRITE));
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}
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static void
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e_canvas_vbox_init (ECanvasVbox *vbox)
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{
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vbox->items = NULL;
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vbox->width = 10;
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vbox->minimum_width = 10;
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vbox->height = 10;
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vbox->spacing = 0;
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e_canvas_item_set_reflow_callback (GNOME_CANVAS_ITEM (vbox), e_canvas_vbox_reflow);
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}
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static void
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e_canvas_vbox_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GnomeCanvasItem *item;
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ECanvasVbox *e_canvas_vbox;
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item = GNOME_CANVAS_ITEM (object);
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e_canvas_vbox = E_CANVAS_VBOX (object);
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switch (property_id) {
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case PROP_WIDTH:
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case PROP_MINIMUM_WIDTH:
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e_canvas_vbox->minimum_width = g_value_get_double (value);
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e_canvas_vbox_resize_children (item);
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e_canvas_item_request_reflow (item);
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break;
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case PROP_SPACING:
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e_canvas_vbox->spacing = g_value_get_double (value);
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e_canvas_item_request_reflow (item);
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break;
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}
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}
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static void
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e_canvas_vbox_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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ECanvasVbox *e_canvas_vbox;
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e_canvas_vbox = E_CANVAS_VBOX (object);
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switch (property_id) {
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case PROP_WIDTH:
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g_value_set_double (value, e_canvas_vbox->width);
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break;
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case PROP_MINIMUM_WIDTH:
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g_value_set_double (value, e_canvas_vbox->minimum_width);
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break;
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case PROP_HEIGHT:
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g_value_set_double (value, e_canvas_vbox->height);
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break;
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case PROP_SPACING:
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g_value_set_double (value, e_canvas_vbox->spacing);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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/* Used from g_list_foreach(); disconnects from an item's signals */
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static void
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disconnect_item_cb (gpointer data,
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gpointer user_data)
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{
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ECanvasVbox *vbox;
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GnomeCanvasItem *item;
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vbox = E_CANVAS_VBOX (user_data);
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item = GNOME_CANVAS_ITEM (data);
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g_signal_handlers_disconnect_matched (item,
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G_SIGNAL_MATCH_DATA,
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0, 0, NULL, NULL,
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vbox);
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}
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static void
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e_canvas_vbox_dispose (GObject *object)
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{
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ECanvasVbox *vbox = E_CANVAS_VBOX (object);
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if (vbox->items) {
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g_list_foreach (vbox->items, disconnect_item_cb, vbox);
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g_list_free (vbox->items);
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vbox->items = NULL;
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}
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G_OBJECT_CLASS (e_canvas_vbox_parent_class)->dispose (object);
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}
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static gint
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e_canvas_vbox_event (GnomeCanvasItem *item,
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GdkEvent *event)
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{
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gint return_val = TRUE;
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switch (event->type) {
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case GDK_KEY_PRESS:
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switch (event->key.keyval) {
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case GDK_KEY_Left:
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case GDK_KEY_KP_Left:
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case GDK_KEY_Right:
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case GDK_KEY_KP_Right:
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case GDK_KEY_Down:
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case GDK_KEY_KP_Down:
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case GDK_KEY_Up:
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case GDK_KEY_KP_Up:
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case GDK_KEY_Return:
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case GDK_KEY_KP_Enter:
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return_val = TRUE;
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break;
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default:
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return_val = FALSE;
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break;
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}
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break;
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default:
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return_val = FALSE;
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break;
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}
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if (!return_val) {
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if (GNOME_CANVAS_ITEM_CLASS (e_canvas_vbox_parent_class)->event)
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return GNOME_CANVAS_ITEM_CLASS (e_canvas_vbox_parent_class)->event (item, event);
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}
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return return_val;
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}
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static void
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e_canvas_vbox_realize (GnomeCanvasItem *item)
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{
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if (GNOME_CANVAS_ITEM_CLASS (e_canvas_vbox_parent_class)->realize)
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(* GNOME_CANVAS_ITEM_CLASS (e_canvas_vbox_parent_class)->realize) (item);
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e_canvas_vbox_resize_children (item);
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e_canvas_item_request_reflow (item);
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}
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static void
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e_canvas_vbox_remove_item (gpointer data,
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GObject *where_object_was)
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{
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ECanvasVbox *vbox = data;
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vbox->items = g_list_remove (vbox->items, where_object_was);
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}
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static void
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e_canvas_vbox_real_add_item (ECanvasVbox *e_canvas_vbox,
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GnomeCanvasItem *item)
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{
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e_canvas_vbox->items = g_list_append (e_canvas_vbox->items, item);
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g_object_weak_ref (G_OBJECT (item),
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e_canvas_vbox_remove_item, e_canvas_vbox);
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if (GNOME_CANVAS_ITEM (e_canvas_vbox)->flags & GNOME_CANVAS_ITEM_REALIZED) {
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gnome_canvas_item_set (item,
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"width", (gdouble) e_canvas_vbox->minimum_width,
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NULL);
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e_canvas_item_request_reflow (item);
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}
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}
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static void
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e_canvas_vbox_real_add_item_start (ECanvasVbox *e_canvas_vbox,
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GnomeCanvasItem *item)
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{
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e_canvas_vbox->items = g_list_prepend (e_canvas_vbox->items, item);
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g_object_weak_ref (G_OBJECT (item),
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e_canvas_vbox_remove_item, e_canvas_vbox);
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if (GNOME_CANVAS_ITEM (e_canvas_vbox)->flags & GNOME_CANVAS_ITEM_REALIZED) {
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gnome_canvas_item_set (item,
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"width", (gdouble) e_canvas_vbox->minimum_width,
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NULL);
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e_canvas_item_request_reflow (item);
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}
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}
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static void
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e_canvas_vbox_resize_children (GnomeCanvasItem *item)
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{
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GList *list;
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ECanvasVbox *e_canvas_vbox;
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e_canvas_vbox = E_CANVAS_VBOX (item);
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for (list = e_canvas_vbox->items; list; list = list->next) {
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GnomeCanvasItem *child = GNOME_CANVAS_ITEM (list->data);
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gnome_canvas_item_set (child,
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"width", (gdouble) e_canvas_vbox->minimum_width,
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NULL);
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}
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}
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static void
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e_canvas_vbox_reflow (GnomeCanvasItem *item,
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gint flags)
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{
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ECanvasVbox *e_canvas_vbox = E_CANVAS_VBOX (item);
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if (item->flags & GNOME_CANVAS_ITEM_REALIZED) {
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gdouble old_height;
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gdouble running_height;
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gdouble old_width;
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gdouble max_width;
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old_width = e_canvas_vbox->width;
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max_width = e_canvas_vbox->minimum_width;
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old_height = e_canvas_vbox->height;
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running_height = 0;
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if (e_canvas_vbox->items == NULL) {
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} else {
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GList *list;
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gdouble item_height;
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gdouble item_width;
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list = e_canvas_vbox->items;
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g_object_get (list->data,
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"height", &item_height,
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"width", &item_width,
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NULL);
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e_canvas_item_move_absolute (GNOME_CANVAS_ITEM (list->data),
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(gdouble) 0,
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(gdouble) running_height);
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running_height += item_height;
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if (max_width < item_width)
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max_width = item_width;
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list = g_list_next (list);
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for (; list; list = g_list_next (list)) {
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running_height += e_canvas_vbox->spacing;
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g_object_get (list->data,
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"height", &item_height,
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"width", &item_width,
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NULL);
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e_canvas_item_move_absolute (GNOME_CANVAS_ITEM (list->data),
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(gdouble) 0,
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(gdouble) running_height);
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running_height += item_height;
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if (max_width < item_width)
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max_width = item_width;
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}
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}
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e_canvas_vbox->height = running_height;
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e_canvas_vbox->width = max_width;
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if (old_height != e_canvas_vbox->height ||
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old_width != e_canvas_vbox->width)
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e_canvas_item_request_parent_reflow (item);
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}
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}
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void
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e_canvas_vbox_add_item (ECanvasVbox *e_canvas_vbox,
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GnomeCanvasItem *item)
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{
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if (E_CANVAS_VBOX_CLASS (G_OBJECT_GET_CLASS (e_canvas_vbox))->add_item)
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(E_CANVAS_VBOX_CLASS (G_OBJECT_GET_CLASS (e_canvas_vbox))->add_item) (e_canvas_vbox, item);
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}
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void
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e_canvas_vbox_add_item_start (ECanvasVbox *e_canvas_vbox,
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GnomeCanvasItem *item)
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{
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if (E_CANVAS_VBOX_CLASS (G_OBJECT_GET_CLASS (e_canvas_vbox))->add_item_start)
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(E_CANVAS_VBOX_CLASS (G_OBJECT_GET_CLASS (e_canvas_vbox))->add_item_start) (e_canvas_vbox, item);
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}
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