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         /* reserved_1 */ NULL,
  51         /* reserved_2 */ NULL,
  52         (GtkClassInitFunc) NULL,
  53       };
  54
  55       event_box_type = gtk_type_unique (gtk_bin_get_type (), &event_box_info);
  56     }
  57
  58   return event_box_type;
  59 }
  60
  61 static void
  62 gtk_event_box_class_init (GtkEventBoxClass *class)
  63 {
  64   GtkWidgetClass *widget_class;
  65
  66   widget_class = (GtkWidgetClass*) class;
  67
  68   widget_class->realize = gtk_event_box_realize;
  69   widget_class->size_request = gtk_event_box_size_request;
  70   widget_class->size_allocate = gtk_event_box_size_allocate;
  71   widget_class->draw = gtk_event_box_draw;
  72   widget_class->expose_event = gtk_event_box_expose;
  73 }
  74
  75 static void
  76 gtk_event_box_init (GtkEventBox *event_box)
  77 {
  78   GTK_WIDGET_UNSET_FLAGS (event_box, GTK_NO_WINDOW);
  79   GTK_WIDGET_SET_FLAGS (event_box, GTK_BASIC);
  80 }
  81
  82 GtkWidget*
  83 gtk_event_box_new (void)
  84 {
  85   return GTK_WIDGET ( gtk_type_new (gtk_event_box_get_type ()));
  86 }
  87
  88 static void
  89 gtk_event_box_realize (GtkWidget *widget)
  90 {
  91   GdkWindowAttr attributes;
  92   gint attributes_mask;
  93   gint border_width;
  94
  95   g_return_if_fail (widget != NULL);
  96   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
  97
  98   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
  99
 100   border_width = GTK_CONTAINER (widget)->border_width;
 101
 102   attributes.x = widget->allocation.x + border_width;
 103   attributes.y = widget->allocation.y + border_width;
 104   attributes.width = widget->allocation.width - 2*border_width;
 105   attributes.height = widget->allocation.height - 2*border_width;
 106   attributes.window_type = GDK_WINDOW_CHILD;
 107   attributes.wclass = GDK_INPUT_OUTPUT;
 108   attributes.visual = gtk_widget_get_visual (widget);
 109   attributes.colormap = gtk_widget_get_colormap (widget);
 110   attributes.event_mask = gtk_widget_get_events (widget)
 111                         | GDK_BUTTON_MOTION_MASK
 112                         | GDK_BUTTON_PRESS_MASK
 113                         | GDK_BUTTON_RELEASE_MASK
 114                         | GDK_EXPOSURE_MASK
 115                         | GDK_ENTER_NOTIFY_MASK
 116                         | GDK_LEAVE_NOTIFY_MASK;
 117
 118   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 119
 120   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 121   gdk_window_set_user_data (widget->window, widget);
 122
 123   widget->style = gtk_style_attach (widget->style, widget->window);
 124   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 125 }
 126
 127 static void
 128 gtk_event_box_size_request (GtkWidget      *widget,
 129                         GtkRequisition *requisition)
 130 {
 131   GtkBin *bin;
 132
 133   g_return_if_fail (widget != NULL);
 134   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 135   g_return_if_fail (requisition != NULL);
 136
 137   bin = GTK_BIN (widget);
 138
 139   requisition->width = GTK_CONTAINER (widget)->border_width * 2;
 140   requisition->height = GTK_CONTAINER (widget)->border_width * 2;
 141
 142   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 143     {
 144       gtk_widget_size_request (bin->child, &bin->child->requisition);
 145
 146       requisition->width += bin->child->requisition.width;
 147       requisition->height += bin->child->requisition.height;
 148     }
 149 }
 150
 151 static void
 152 gtk_event_box_size_allocate (GtkWidget     *widget,
 153                             GtkAllocation *allocation)
 154 {
 155   GtkBin *bin;
 156   GtkAllocation child_allocation;
 157
 158   g_return_if_fail (widget != NULL);
 159   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 160   g_return_if_fail (allocation != NULL);
 161
 162   widget->allocation = *allocation;
 163   bin = GTK_BIN (widget);
 164
 165   child_allocation.x = 0;
 166   child_allocation.y = 0;
 167   child_allocation.width = MAX (allocation->width - GTK_CONTAINER (widget)->border_width * 2, 0);
 168   child_allocation.height = MAX (allocation->height - GTK_CONTAINER (widget)->border_width * 2, 0);
 169
 170   if (GTK_WIDGET_REALIZED (widget))
 171     {
 172       gdk_window_move_resize (widget->window,
 173                               allocation->x + GTK_CONTAINER (widget)->border_width,
 174                               allocation->y + GTK_CONTAINER (widget)->border_width,
 175                               child_allocation.width,
 176                               child_allocation.height);
 177     }
 178
 179   if (bin->child)
 180     {
 181       gtk_widget_size_allocate (bin->child, &child_allocation);
 182     }
 183 }
 184
 185 static void
 186 gtk_event_box_draw (GtkWidget    *widget,
 187                    GdkRectangle *area)
 188 {
 189   GtkBin *bin;
 190   GdkRectangle tmp_area;
 191   GdkRectangle child_area;
 192
 193   g_return_if_fail (widget != NULL);
 194   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 195
 196   if (GTK_WIDGET_DRAWABLE (widget))
 197     {
 198       bin = GTK_BIN (widget);
 199       tmp_area = *area;
 200       tmp_area.x -= GTK_CONTAINER (widget)->border_width;
 201       tmp_area.y -= GTK_CONTAINER (widget)->border_width;
 202
 203       if (bin->child)
 204         {
 205           if (gtk_widget_intersect (bin->child, &tmp_area, &child_area))
 206             gtk_widget_draw (bin->child, &child_area);
 207         }
 208     }
 209 }
 210
 211 static gint
 212 gtk_event_box_expose (GtkWidget      *widget,
 213                      GdkEventExpose *event)
 214 {
 215   GtkBin *bin;
 216   GdkEventExpose child_event;
 217
 218   g_return_val_if_fail (widget != NULL, FALSE);
 219   g_return_val_if_fail (GTK_IS_EVENT_BOX (widget), FALSE);
 220   g_return_val_if_fail (event != NULL, FALSE);
 221
 222   if (GTK_WIDGET_DRAWABLE (widget))
 223     {
 224       bin = GTK_BIN (widget);
 225
 226       child_event = *event;
 227       if (bin->child &&
 228           GTK_WIDGET_NO_WINDOW (bin->child) &&
 229           gtk_widget_intersect (bin->child, &event->area, &child_event.area))
 230         gtk_widget_event (bin->child, (GdkEvent*) &child_event);
 231     }
 232
 233   return FALSE;
 234 }
 235