shell/ev-navigation-action-widget.c

   1 /*
   2  *  Copyright (C) 2003, 2004 Marco Pesenti Gritti
   3  *  Copyright (C) 2003, 2004 Christian Persch
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2, or (at your option)
   8  *  any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include "config.h"
  21 #include "ev-navigation-action-widget.h"
  22
  23 #include <glib/gi18n.h>
  24 #include <string.h>
  25
  26 static void  ev_navigation_action_widget_init       (EvNavigationActionWidget      *action_widget);
  27 static void  ev_navigation_action_widget_class_init (EvNavigationActionWidgetClass *action_widget);
  28 static void ev_navigation_action_widget_toggled (GtkToggleToolButton *toggle);
  29 static gboolean ev_navigation_action_widget_button_press_event (GtkWidget *widget,
  30                                                              GdkEventButton    *event);
  31
  32 G_DEFINE_TYPE (EvNavigationActionWidget, ev_navigation_action_widget, GTK_TYPE_TOGGLE_TOOL_BUTTON)
  33
  34 enum
  35 {
  36         SHOW_MENU,
  37         LAST_SIGNAL
  38 };
  39
  40 static gint signals[LAST_SIGNAL];
  41
  42 static void
  43 ev_navigation_action_widget_init (EvNavigationActionWidget *action_widget)
  44 {
  45         return;
  46 }
  47
  48 static void
  49 ev_navigation_action_widget_class_init (EvNavigationActionWidgetClass *klass)
  50 {
  51         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
  52         GtkToggleToolButtonClass *toggle_tool_button_class = GTK_TOGGLE_TOOL_BUTTON_CLASS (klass);
  53
  54         widget_class->button_press_event = ev_navigation_action_widget_button_press_event;
  55         toggle_tool_button_class->toggled = ev_navigation_action_widget_toggled;
  56
  57
  58         signals[SHOW_MENU] =
  59                   g_signal_new ("show-menu",
  60                                 G_OBJECT_CLASS_TYPE (klass),
  61                                 G_SIGNAL_RUN_FIRST,
  62                                 G_STRUCT_OFFSET (EvNavigationActionWidgetClass, show_menu),
  63                                 NULL, NULL,
  64                                 g_cclosure_marshal_VOID__VOID,
  65                                 G_TYPE_NONE, 0);
  66 }
  67
  68 static int
  69 menu_deactivate_cb (GtkMenuShell      *menu_shell,
  70                     EvNavigationActionWidget *widget)
  71 {
  72          gtk_toggle_tool_button_set_active (GTK_TOGGLE_TOOL_BUTTON (widget), FALSE);
  73          return TRUE;
  74 }
  75
  76 static void
  77 menu_detacher (GtkWidget *widget,
  78                GtkMenu   *menu)
  79 {
  80          EvNavigationActionWidget *button = EV_NAVIGATION_ACTION_WIDGET (widget);
  81          g_return_if_fail (button->menu == menu);
  82          button->menu = NULL;
  83 }
  84
  85 void
  86 ev_navigation_action_widget_set_menu(EvNavigationActionWidget *button, GtkWidget *menu)
  87 {
  88
  89       if (button->menu == GTK_MENU (menu))
  90                 return;
  91
  92       if (button->menu && GTK_WIDGET_VISIBLE (button->menu))
  93                 gtk_menu_shell_deactivate (GTK_MENU_SHELL (button->menu));
  94
  95       if (button->menu) {
  96                 g_signal_handlers_disconnect_by_func (button->menu,
  97                                                 menu_deactivate_cb,
  98                                                 button);
  99                 gtk_menu_detach (button->menu);
 100        }
 101
 102        button->menu = GTK_MENU (menu);
 103
 104        if (button->menu) {
 105                 gtk_menu_attach_to_widget (button->menu, GTK_WIDGET (button),
 106                                            menu_detacher);
 107                 g_signal_connect (button->menu, "deactivate",
 108                                   G_CALLBACK (menu_deactivate_cb), button);
 109         }
 110 }
 111
 112 static void
 113 menu_position_func (GtkMenu           *menu,
 114                     int               *x,
 115                     int               *y,
 116                     gboolean          *push_in,
 117                     EvNavigationActionWidget *button)
 118 {
 119         GtkWidget *widget = GTK_WIDGET (button);
 120         GtkRequisition menu_req;
 121         GtkTextDirection direction;
 122         GdkRectangle monitor;
 123         gint monitor_num;
 124         GdkScreen *screen;
 125
 126         gtk_widget_size_request (GTK_WIDGET (button->menu), &menu_req);
 127         direction = gtk_widget_get_direction (widget);
 128         screen = gtk_widget_get_screen (GTK_WIDGET (menu));
 129
 130         monitor_num = gdk_screen_get_monitor_at_window (screen, widget->window);
 131         if (monitor_num < 0)
 132                 monitor_num = 0;
 133         gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor);
 134
 135         gdk_window_get_origin (widget->window, x, y);
 136         *x += widget->allocation.x;
 137         *y += widget->allocation.y;
 138
 139         if (direction == GTK_TEXT_DIR_LTR)
 140                 *x += MAX (widget->allocation.width - menu_req.width, 0);
 141         else if (menu_req.width > widget->allocation.width)
 142                 *x -= menu_req.width - widget->allocation.width;
 143
 144         if ((*y + widget->allocation.height + menu_req.height) <= monitor.y + monitor.height)
 145                 *y += widget->allocation.height;
 146         else if ((*y - menu_req.height) >= monitor.y)
 147                 *y -= menu_req.height;
 148         else if (monitor.y + monitor.height - (*y + widget->allocation.height) > *y)
 149                 *y += widget->allocation.height;
 150         else
 151                 *y -= menu_req.height;
 152
 153         *push_in = FALSE;
 154 }
 155
 156 static void
 157 popup_menu_under_arrow (EvNavigationActionWidget *button,
 158                         GdkEventButton    *event)
 159 {
 160         if (!button->menu)
 161                 return;
 162
 163         g_signal_emit (button, signals[SHOW_MENU], 0);
 164
 165         gtk_menu_popup (button->menu, NULL, NULL,
 166                         (GtkMenuPositionFunc) menu_position_func,
 167                          button,
 168                          event ? event->button : 0,
 169                          event ? event->time : gtk_get_current_event_time ());
 170 }
 171
 172 static void
 173 ev_navigation_action_widget_toggled (GtkToggleToolButton *toggle)
 174 {
 175         EvNavigationActionWidget *button = EV_NAVIGATION_ACTION_WIDGET (toggle);
 176         if (!button->menu)
 177                 return;
 178
 179         if (gtk_toggle_tool_button_get_active (GTK_TOGGLE_TOOL_BUTTON (button)) &&
 180             !GTK_WIDGET_VISIBLE (button->menu)) {
 181                       /* we get here only when the menu is activated by a key
 182                        * press, so that we can select the first menu item */
 183                       popup_menu_under_arrow (button, NULL);
 184                       gtk_menu_shell_select_first (GTK_MENU_SHELL (button->menu), FALSE);
 185         }
 186 }
 187
 188 static gboolean
 189 ev_navigation_action_widget_button_press_event (GtkWidget *widget,
 190                                                 GdkEventButton    *event)
 191 {
 192         EvNavigationActionWidget *button = EV_NAVIGATION_ACTION_WIDGET (widget);
 193         if (event->button == 1) {
 194                  popup_menu_under_arrow (button, event);
 195                  gtk_toggle_tool_button_set_active (GTK_TOGGLE_TOOL_BUTTON (button), TRUE);
 196                  return TRUE;
 197         }
 198         return FALSE;
 199 }