vcs.maemo.org Git - hildon/blob - src/hildon-stackable-window.c

   1 /*
   2  * This file is a part of hildon
   3  *
   4  * Copyright (C) 2008 Nokia Corporation, all rights reserved.
   5  *
   6  * Contact: Karl Lattimer <karl.lattimer@nokia.com>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public License
  10  * as published by the Free Software Foundation; version 2.1 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  21  * 02110-1301 USA
  22  *
  23  */
  24
  25 /**
  26  * SECTION:hildon-stackable-window
  27  * @short_description: Widget representing a stackable, top-level window in the Hildon framework.
  28  *
  29  * The #HildonStackableWindow is a GTK+ widget which represents a
  30  * top-level window in the Hildon framework. It is derived from
  31  * #HildonWindow. Applications that use stackable windows are organized
  32  * in a hierarchical way so users can go from any window back to the
  33  * application's root window.
  34  *
  35  * To add a window to the stack, use hildon_program_add_window(). Once
  36  * you show the new window, the previous one will be automatically
  37  * hidden. When the new window is destroyed, the previous one will
  38  * appear again.
  39  *
  40  * <example>
  41  * <programlisting>
  42  * void
  43  * show_first_window (void)
  44  * {
  45  *     HildonProgram *program;
  46  *     GtkWidget *win1;
  47  * <!-- -->
  48  *     program = hildon_program_get_instance ();
  49  *     win1 = hildon_stackable_window_new ();
  50  * <!-- -->
  51  *     // ... configure first window
  52  * <!-- -->
  53  *     hildon_program_add_window (program, HILDON_WINDOW (win1));
  54  *     gtk_widget_show (win1);
  55  * }
  56  * <!-- -->
  57  * void
  58  * show_second_window (void)
  59  * {
  60  *     HildonProgram *program;
  61  *     GtkWidget *win2;
  62  * <!-- -->
  63  *     program = hildon_program_get_instance ();
  64  *     win2 = hildon_stackable_window_new ();
  65  * <!-- -->
  66  *     // ... configure second window
  67  * <!-- -->
  68  *     hildon_program_add_window (program, HILDON_WINDOW (win2));
  69  *     gtk_widget_show (win2);
  70  * }
  71  * </programlisting>
  72  * </example>
  73  */
  74
  75 #include                                        <X11/X.h>
  76 #include                                        <X11/Xatom.h>
  77 #include                                        "hildon-stackable-window.h"
  78 #include                                        "hildon-stackable-window-private.h"
  79 #include                                        "hildon-program.h"
  80 #include                                        "hildon-window-private.h"
  81 #include                                        "hildon-program-private.h"
  82
  83 G_DEFINE_TYPE (HildonStackableWindow, hildon_stackable_window, HILDON_TYPE_WINDOW);
  84
  85 void G_GNUC_INTERNAL
  86 hildon_stackable_window_set_going_home          (HildonStackableWindow *self,
  87                                                  gboolean going_home)
  88 {
  89     HildonStackableWindowPrivate *priv = HILDON_STACKABLE_WINDOW_GET_PRIVATE (self);
  90     priv->going_home = going_home;
  91 }
  92
  93 gboolean G_GNUC_INTERNAL
  94 hildon_stackable_window_get_going_home          (HildonStackableWindow *self)
  95 {
  96     HildonStackableWindowPrivate *priv = HILDON_STACKABLE_WINDOW_GET_PRIVATE (self);
  97     return priv->going_home;
  98 }
  99
 100 static GSList*
 101 get_window_list                                 (GtkWidget *widget)
 102 {
 103     HildonWindowPrivate *wpriv;
 104     HildonProgramPrivate *ppriv;
 105     GSList *retval = NULL;
 106     g_return_val_if_fail (widget != NULL, NULL);
 107
 108     wpriv = HILDON_WINDOW_GET_PRIVATE (widget);
 109     g_assert (wpriv != NULL);
 110
 111     if (wpriv->program)
 112     {
 113         ppriv = HILDON_PROGRAM_GET_PRIVATE (wpriv->program);
 114         g_assert (ppriv != NULL);
 115         retval = ppriv->windows;
 116     }
 117
 118     return retval;
 119 }
 120
 121 static GtkWidget*
 122 get_previous_window_if_last                     (GtkWidget *widget)
 123 {
 124     GtkWidget *retval = NULL;
 125     GSList *iter = get_window_list (widget);
 126     GSList *previous = NULL;
 127
 128     /* Return NULL if the window hasn't been added to the HildonProgram */
 129     if (iter == NULL)
 130     {
 131         return NULL;
 132     }
 133
 134     /* Go to the end of the window list */
 135     while (iter->next != NULL)
 136     {
 137         previous = iter;
 138         iter = iter->next;
 139     }
 140
 141     if ((iter->data == widget) && (previous != NULL))
 142     {
 143         retval = GTK_WIDGET (previous->data);
 144     }
 145
 146     return retval;
 147 }
 148
 149 static void
 150 hildon_stackable_window_map                     (GtkWidget *widget)
 151 {
 152     GtkWidget *previous = get_previous_window_if_last (widget);
 153
 154     if (GTK_WIDGET_CLASS (hildon_stackable_window_parent_class)->map)
 155         GTK_WIDGET_CLASS (hildon_stackable_window_parent_class)->map (widget);
 156
 157     if (HILDON_IS_STACKABLE_WINDOW (previous) && GTK_WIDGET_VISIBLE (previous))
 158         gtk_widget_hide (previous);
 159 }
 160
 161 static void
 162 hildon_stackable_window_unmap                   (GtkWidget *widget)
 163 {
 164     GtkWidget *previous = get_previous_window_if_last (widget);
 165
 166     if (GTK_WIDGET_CLASS (hildon_stackable_window_parent_class)->unmap)
 167         GTK_WIDGET_CLASS (hildon_stackable_window_parent_class)->unmap (widget);
 168
 169     if (HILDON_IS_STACKABLE_WINDOW (previous) && !GTK_WIDGET_VISIBLE (previous) &&
 170         !hildon_stackable_window_get_going_home (HILDON_STACKABLE_WINDOW (widget)))
 171     {
 172         gtk_widget_show (previous);
 173     }
 174 }
 175
 176 static void
 177 hildon_stackable_window_unset_program           (HildonWindow *hwin)
 178 {
 179     GtkWidget *previous = get_previous_window_if_last (GTK_WIDGET (hwin));
 180
 181     if (HILDON_WINDOW_CLASS (hildon_stackable_window_parent_class)->unset_program)
 182         HILDON_WINDOW_CLASS (hildon_stackable_window_parent_class)->unset_program (hwin);
 183
 184     if (HILDON_IS_STACKABLE_WINDOW (previous) && !GTK_WIDGET_VISIBLE (previous) &&
 185         !hildon_stackable_window_get_going_home (HILDON_STACKABLE_WINDOW (hwin)))
 186     {
 187         gtk_widget_show (previous);
 188     }
 189 }
 190
 191 static void
 192 hildon_stackable_window_realize                 (GtkWidget *widget)
 193 {
 194     GdkDisplay *display;
 195     Atom atom;
 196
 197     GTK_WIDGET_CLASS (hildon_stackable_window_parent_class)->realize (widget);
 198
 199     /* Set the window type to "_HILDON_WM_WINDOW_TYPE_STACKABLE", to allow the WM to manage
 200        it properly.  */
 201     display = gdk_drawable_get_display (widget->window);
 202     atom = gdk_x11_get_xatom_by_name_for_display (display, "_HILDON_WM_WINDOW_TYPE_STACKABLE");
 203     XChangeProperty (GDK_DISPLAY_XDISPLAY (display), GDK_WINDOW_XID (widget->window),
 204                      gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_WINDOW_TYPE"),
 205                      XA_ATOM, 32, PropModeAppend,
 206                      (guchar *)&atom, 1);
 207 }
 208
 209 static gboolean
 210 hildon_stackable_window_delete_event            (GtkWidget *widget,
 211                                                  GdkEventAny *event)
 212 {
 213     GSList *list = get_window_list (widget);
 214     list = g_slist_find (list, widget);
 215
 216     /* Ignore the delete event if this is not the topmost window */
 217     if (list != NULL && list->next != NULL)
 218         return TRUE;
 219     else if (GTK_WIDGET_CLASS (hildon_stackable_window_parent_class)->delete_event)
 220         return GTK_WIDGET_CLASS (hildon_stackable_window_parent_class)->delete_event (widget, event);
 221     else
 222         return FALSE;
 223 }
 224
 225 static void
 226 hildon_stackable_window_class_init              (HildonStackableWindowClass *klass)
 227 {
 228     GtkWidgetClass    *widget_class = GTK_WIDGET_CLASS (klass);
 229     HildonWindowClass *window_class = HILDON_WINDOW_CLASS (klass);
 230
 231     widget_class->map               = hildon_stackable_window_map;
 232     widget_class->unmap             = hildon_stackable_window_unmap;
 233     widget_class->realize           = hildon_stackable_window_realize;
 234     widget_class->delete_event      = hildon_stackable_window_delete_event;
 235
 236     window_class->unset_program     = hildon_stackable_window_unset_program;
 237
 238     g_type_class_add_private (klass, sizeof (HildonStackableWindowPrivate));
 239 }
 240
 241 static void
 242 hildon_stackable_window_init                    (HildonStackableWindow *self)
 243 {
 244     hildon_stackable_window_set_going_home (self, FALSE);
 245 }
 246
 247 /**
 248  * hildon_stackable_window_new:
 249  *
 250  * Creates a new #HildonStackableWindow.
 251  *
 252  * Return value: A #HildonStackableWindow
 253  **/
 254 GtkWidget*
 255 hildon_stackable_window_new                     (void)
 256 {
 257     HildonStackableWindow *newwindow = g_object_new (HILDON_TYPE_STACKABLE_WINDOW, NULL);
 258
 259     return GTK_WIDGET (newwindow);
 260 }