Pileus Git - ~andy/gtk/blob - gtk/gtkeventbox.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19 #include "gtksignal.h"
  20 #include "gtkeventbox.h"
  21
  22
  23 static void gtk_event_box_class_init               (GtkEventBoxClass *klass);
  24 static void gtk_event_box_init                     (GtkEventBox      *event_box);
  25 static void gtk_event_box_realize                  (GtkWidget        *widget);
  26 static void gtk_event_box_size_request             (GtkWidget        *widget,
  27                                                     GtkRequisition   *requisition);
  28 static void gtk_event_box_size_allocate            (GtkWidget        *widget,
  29                                                     GtkAllocation    *allocation);
  30 static void gtk_event_box_draw                     (GtkWidget    *widget,
  31                                                    GdkRectangle *area);
  32 static gint gtk_event_box_expose                   (GtkWidget      *widget,
  33                                                    GdkEventExpose *event);
  34
  35
  36 GtkType
  37 gtk_event_box_get_type (void)
  38 {
  39   static GtkType event_box_type = 0;
  40
  41   if (!event_box_type)
  42     {
  43       GtkTypeInfo event_box_info =
  44       {
  45         "GtkEventBox",
  46         sizeof (GtkEventBox),
  47         sizeof (GtkEventBoxClass),
  48         (GtkClassInitFunc) gtk_event_box_class_init,
  49         (GtkObjectInitFunc) gtk_event_box_init,
  50         (GtkArgSetFunc) NULL,
  51         (GtkArgGetFunc) NULL,
  52       };
  53
  54       event_box_type = gtk_type_unique (gtk_bin_get_type (), &event_box_info);
  55     }
  56
  57   return event_box_type;
  58 }
  59
  60 static void
  61 gtk_event_box_class_init (GtkEventBoxClass *class)
  62 {
  63   GtkWidgetClass *widget_class;
  64
  65   widget_class = (GtkWidgetClass*) class;
  66
  67   widget_class->realize = gtk_event_box_realize;
  68   widget_class->size_request = gtk_event_box_size_request;
  69   widget_class->size_allocate = gtk_event_box_size_allocate;
  70   widget_class->draw = gtk_event_box_draw;
  71   widget_class->expose_event = gtk_event_box_expose;
  72 }
  73
  74 static void
  75 gtk_event_box_init (GtkEventBox *event_box)
  76 {
  77   GTK_WIDGET_UNSET_FLAGS (event_box, GTK_NO_WINDOW);
  78   GTK_WIDGET_SET_FLAGS (event_box, GTK_BASIC);
  79 }
  80
  81 GtkWidget*
  82 gtk_event_box_new (void)
  83 {
  84   return GTK_WIDGET ( gtk_type_new (gtk_event_box_get_type ()));
  85 }
  86
  87 static void
  88 gtk_event_box_realize (GtkWidget *widget)
  89 {
  90   GdkWindowAttr attributes;
  91   gint attributes_mask;
  92   gint border_width;
  93
  94   g_return_if_fail (widget != NULL);
  95   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
  96
  97   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
  98
  99   border_width = GTK_CONTAINER (widget)->border_width;
 100
 101   attributes.x = widget->allocation.x + border_width;
 102   attributes.y = widget->allocation.y + border_width;
 103   attributes.width = widget->allocation.width - 2*border_width;
 104   attributes.height = widget->allocation.height - 2*border_width;
 105   attributes.window_type = GDK_WINDOW_CHILD;
 106   attributes.wclass = GDK_INPUT_OUTPUT;
 107   attributes.visual = gtk_widget_get_visual (widget);
 108   attributes.colormap = gtk_widget_get_colormap (widget);
 109   attributes.event_mask = gtk_widget_get_events (widget)
 110                         | GDK_BUTTON_MOTION_MASK
 111                         | GDK_BUTTON_PRESS_MASK
 112                         | GDK_BUTTON_RELEASE_MASK
 113                         | GDK_EXPOSURE_MASK
 114                         | GDK_ENTER_NOTIFY_MASK
 115                         | GDK_LEAVE_NOTIFY_MASK;
 116
 117   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 118
 119   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 120   gdk_window_set_user_data (widget->window, widget);
 121
 122   widget->style = gtk_style_attach (widget->style, widget->window);
 123   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 124 }
 125
 126 static void
 127 gtk_event_box_size_request (GtkWidget      *widget,
 128                         GtkRequisition *requisition)
 129 {
 130   GtkBin *bin;
 131
 132   g_return_if_fail (widget != NULL);
 133   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 134   g_return_if_fail (requisition != NULL);
 135
 136   bin = GTK_BIN (widget);
 137
 138   requisition->width = GTK_CONTAINER (widget)->border_width * 2;
 139   requisition->height = GTK_CONTAINER (widget)->border_width * 2;
 140
 141   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 142     {
 143       gtk_widget_size_request (bin->child, &bin->child->requisition);
 144
 145       requisition->width += bin->child->requisition.width;
 146       requisition->height += bin->child->requisition.height;
 147     }
 148 }
 149
 150 static void
 151 gtk_event_box_size_allocate (GtkWidget     *widget,
 152                             GtkAllocation *allocation)
 153 {
 154   GtkBin *bin;
 155   GtkAllocation child_allocation;
 156
 157   g_return_if_fail (widget != NULL);
 158   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 159   g_return_if_fail (allocation != NULL);
 160
 161   widget->allocation = *allocation;
 162   bin = GTK_BIN (widget);
 163
 164   child_allocation.x = 0;
 165   child_allocation.y = 0;
 166   child_allocation.width = MAX (allocation->width - GTK_CONTAINER (widget)->border_width * 2, 0);
 167   child_allocation.height = MAX (allocation->height - GTK_CONTAINER (widget)->border_width * 2, 0);
 168
 169   if (GTK_WIDGET_REALIZED (widget))
 170     {
 171       gdk_window_move_resize (widget->window,
 172                               allocation->x + GTK_CONTAINER (widget)->border_width,
 173                               allocation->y + GTK_CONTAINER (widget)->border_width,
 174                               child_allocation.width,
 175                               child_allocation.height);
 176     }
 177
 178   if (bin->child)
 179     {
 180       gtk_widget_size_allocate (bin->child, &child_allocation);
 181     }
 182 }
 183
 184 static void
 185 gtk_event_box_draw (GtkWidget    *widget,
 186                    GdkRectangle *area)
 187 {
 188   GtkBin *bin;
 189   GdkRectangle tmp_area;
 190   GdkRectangle child_area;
 191
 192   g_return_if_fail (widget != NULL);
 193   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 194
 195   if (GTK_WIDGET_DRAWABLE (widget))
 196     {
 197       bin = GTK_BIN (widget);
 198       tmp_area = *area;
 199       tmp_area.x -= GTK_CONTAINER (widget)->border_width;
 200       tmp_area.y -= GTK_CONTAINER (widget)->border_width;
 201
 202       if (bin->child)
 203         {
 204           if (gtk_widget_intersect (bin->child, &tmp_area, &child_area))
 205             gtk_widget_draw (bin->child, &child_area);
 206         }
 207     }
 208 }
 209
 210 static gint
 211 gtk_event_box_expose (GtkWidget      *widget,
 212                      GdkEventExpose *event)
 213 {
 214   GtkBin *bin;
 215   GdkEventExpose child_event;
 216
 217   g_return_val_if_fail (widget != NULL, FALSE);
 218   g_return_val_if_fail (GTK_IS_EVENT_BOX (widget), FALSE);
 219   g_return_val_if_fail (event != NULL, FALSE);
 220
 221   if (GTK_WIDGET_DRAWABLE (widget))
 222     {
 223       bin = GTK_BIN (widget);
 224
 225       child_event = *event;
 226       if (bin->child &&
 227           GTK_WIDGET_NO_WINDOW (bin->child) &&
 228           gtk_widget_intersect (bin->child, &event->area, &child_event.area))
 229         gtk_widget_event (bin->child, (GdkEvent*) &child_event);
 230     }
 231
 232   return FALSE;
 233 }
 234