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
  20 /*
  21  * Modified by the GTK+ Team and others 1997-1999.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include "gtksignal.h"
  28 #include "gtkeventbox.h"
  29
  30
  31 static void gtk_event_box_class_init               (GtkEventBoxClass *klass);
  32 static void gtk_event_box_init                     (GtkEventBox      *event_box);
  33 static void gtk_event_box_realize                  (GtkWidget        *widget);
  34 static void gtk_event_box_size_request             (GtkWidget        *widget,
  35                                                     GtkRequisition   *requisition);
  36 static void gtk_event_box_size_allocate            (GtkWidget        *widget,
  37                                                     GtkAllocation    *allocation);
  38 static void gtk_event_box_paint                    (GtkWidget         *widget,
  39                                                     GdkRectangle      *area);
  40 static void gtk_event_box_draw                     (GtkWidget         *widget,
  41                                                    GdkRectangle       *area);
  42 static gint gtk_event_box_expose                   (GtkWidget         *widget,
  43                                                    GdkEventExpose     *event);
  44
  45
  46 GtkType
  47 gtk_event_box_get_type (void)
  48 {
  49   static GtkType event_box_type = 0;
  50
  51   if (!event_box_type)
  52     {
  53       static const GtkTypeInfo event_box_info =
  54       {
  55         "GtkEventBox",
  56         sizeof (GtkEventBox),
  57         sizeof (GtkEventBoxClass),
  58         (GtkClassInitFunc) gtk_event_box_class_init,
  59         (GtkObjectInitFunc) gtk_event_box_init,
  60         /* reserved_1 */ NULL,
  61         /* reserved_2 */ NULL,
  62         (GtkClassInitFunc) NULL,
  63       };
  64
  65       event_box_type = gtk_type_unique (gtk_bin_get_type (), &event_box_info);
  66     }
  67
  68   return event_box_type;
  69 }
  70
  71 static void
  72 gtk_event_box_class_init (GtkEventBoxClass *class)
  73 {
  74   GtkWidgetClass *widget_class;
  75
  76   widget_class = (GtkWidgetClass*) class;
  77
  78   widget_class->realize = gtk_event_box_realize;
  79   widget_class->size_request = gtk_event_box_size_request;
  80   widget_class->size_allocate = gtk_event_box_size_allocate;
  81   widget_class->draw = gtk_event_box_draw;
  82   widget_class->expose_event = gtk_event_box_expose;
  83 }
  84
  85 static void
  86 gtk_event_box_init (GtkEventBox *event_box)
  87 {
  88   GTK_WIDGET_UNSET_FLAGS (event_box, GTK_NO_WINDOW);
  89 }
  90
  91 GtkWidget*
  92 gtk_event_box_new (void)
  93 {
  94   return GTK_WIDGET ( gtk_type_new (gtk_event_box_get_type ()));
  95 }
  96
  97 static void
  98 gtk_event_box_realize (GtkWidget *widget)
  99 {
 100   GdkWindowAttr attributes;
 101   gint attributes_mask;
 102   gint border_width;
 103
 104   g_return_if_fail (widget != NULL);
 105   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 106
 107   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 108
 109   border_width = GTK_CONTAINER (widget)->border_width;
 110
 111   attributes.x = widget->allocation.x + border_width;
 112   attributes.y = widget->allocation.y + border_width;
 113   attributes.width = widget->allocation.width - 2*border_width;
 114   attributes.height = widget->allocation.height - 2*border_width;
 115   attributes.window_type = GDK_WINDOW_CHILD;
 116   attributes.wclass = GDK_INPUT_OUTPUT;
 117   attributes.visual = gtk_widget_get_visual (widget);
 118   attributes.colormap = gtk_widget_get_colormap (widget);
 119   attributes.event_mask = gtk_widget_get_events (widget)
 120                         | GDK_BUTTON_MOTION_MASK
 121                         | GDK_BUTTON_PRESS_MASK
 122                         | GDK_BUTTON_RELEASE_MASK
 123                         | GDK_EXPOSURE_MASK
 124                         | GDK_ENTER_NOTIFY_MASK
 125                         | GDK_LEAVE_NOTIFY_MASK;
 126
 127   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 128
 129   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 130   gdk_window_set_user_data (widget->window, widget);
 131
 132   widget->style = gtk_style_attach (widget->style, widget->window);
 133   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 134 }
 135
 136 static void
 137 gtk_event_box_size_request (GtkWidget      *widget,
 138                         GtkRequisition *requisition)
 139 {
 140   GtkBin *bin;
 141
 142   g_return_if_fail (widget != NULL);
 143   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 144   g_return_if_fail (requisition != NULL);
 145
 146   bin = GTK_BIN (widget);
 147
 148   requisition->width = GTK_CONTAINER (widget)->border_width * 2;
 149   requisition->height = GTK_CONTAINER (widget)->border_width * 2;
 150
 151   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 152     {
 153       GtkRequisition child_requisition;
 154
 155       gtk_widget_size_request (bin->child, &child_requisition);
 156
 157       requisition->width += child_requisition.width;
 158       requisition->height += child_requisition.height;
 159     }
 160 }
 161
 162 static void
 163 gtk_event_box_size_allocate (GtkWidget     *widget,
 164                             GtkAllocation *allocation)
 165 {
 166   GtkBin *bin;
 167   GtkAllocation child_allocation;
 168
 169   g_return_if_fail (widget != NULL);
 170   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 171   g_return_if_fail (allocation != NULL);
 172
 173   widget->allocation = *allocation;
 174   bin = GTK_BIN (widget);
 175
 176   child_allocation.x = 0;
 177   child_allocation.y = 0;
 178   child_allocation.width = MAX (allocation->width - GTK_CONTAINER (widget)->border_width * 2, 0);
 179   child_allocation.height = MAX (allocation->height - GTK_CONTAINER (widget)->border_width * 2, 0);
 180
 181   if (GTK_WIDGET_REALIZED (widget))
 182     {
 183       gdk_window_move_resize (widget->window,
 184                               allocation->x + GTK_CONTAINER (widget)->border_width,
 185                               allocation->y + GTK_CONTAINER (widget)->border_width,
 186                               child_allocation.width,
 187                               child_allocation.height);
 188     }
 189
 190   if (bin->child)
 191     {
 192       gtk_widget_size_allocate (bin->child, &child_allocation);
 193     }
 194 }
 195
 196 static void
 197 gtk_event_box_paint (GtkWidget    *widget,
 198                      GdkRectangle *area)
 199 {
 200   gtk_paint_flat_box (widget->style, widget->window,
 201                       widget->state, GTK_SHADOW_NONE,
 202                       area, widget, "eventbox",
 203                       0, 0, -1, -1);
 204 }
 205
 206 static void
 207 gtk_event_box_draw (GtkWidget    *widget,
 208                     GdkRectangle *area)
 209 {
 210   GtkBin *bin;
 211   GdkRectangle tmp_area;
 212   GdkRectangle child_area;
 213
 214   g_return_if_fail (widget != NULL);
 215   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 216
 217   if (GTK_WIDGET_DRAWABLE (widget))
 218     {
 219       bin = GTK_BIN (widget);
 220       tmp_area = *area;
 221       tmp_area.x -= GTK_CONTAINER (widget)->border_width;
 222       tmp_area.y -= GTK_CONTAINER (widget)->border_width;
 223
 224       gtk_event_box_paint (widget, &tmp_area);
 225
 226       if (bin->child)
 227         {
 228           if (gtk_widget_intersect (bin->child, &tmp_area, &child_area))
 229             gtk_widget_draw (bin->child, &child_area);
 230         }
 231     }
 232 }
 233
 234 static gint
 235 gtk_event_box_expose (GtkWidget      *widget,
 236                      GdkEventExpose *event)
 237 {
 238   GtkBin *bin;
 239   GdkEventExpose child_event;
 240
 241   g_return_val_if_fail (widget != NULL, FALSE);
 242   g_return_val_if_fail (GTK_IS_EVENT_BOX (widget), FALSE);
 243   g_return_val_if_fail (event != NULL, FALSE);
 244
 245   if (GTK_WIDGET_DRAWABLE (widget))
 246     {
 247       bin = GTK_BIN (widget);
 248
 249       gtk_event_box_paint (widget, &event->area);
 250
 251       child_event = *event;
 252       if (bin->child &&
 253           GTK_WIDGET_NO_WINDOW (bin->child) &&
 254           gtk_widget_intersect (bin->child, &event->area, &child_event.area))
 255         gtk_widget_event (bin->child, (GdkEvent*) &child_event);
 256     }
 257
 258   return FALSE;
 259 }
 260