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 Lesser 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  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser 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 1997-2000.  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 gint gtk_event_box_expose                   (GtkWidget         *widget,
  41                                                    GdkEventExpose     *event);
  42
  43
  44 static GtkBinClass *parent_class = NULL;
  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   parent_class = g_type_class_peek_parent (class);
  77
  78   widget_class = (GtkWidgetClass*) class;
  79
  80   widget_class->realize = gtk_event_box_realize;
  81   widget_class->size_request = gtk_event_box_size_request;
  82   widget_class->size_allocate = gtk_event_box_size_allocate;
  83   widget_class->expose_event = gtk_event_box_expose;
  84 }
  85
  86 static void
  87 gtk_event_box_init (GtkEventBox *event_box)
  88 {
  89   GTK_WIDGET_UNSET_FLAGS (event_box, GTK_NO_WINDOW);
  90 }
  91
  92 GtkWidget*
  93 gtk_event_box_new (void)
  94 {
  95   return GTK_WIDGET ( gtk_type_new (gtk_event_box_get_type ()));
  96 }
  97
  98 static void
  99 gtk_event_box_realize (GtkWidget *widget)
 100 {
 101   GdkWindowAttr attributes;
 102   gint attributes_mask;
 103   gint border_width;
 104
 105   g_return_if_fail (widget != NULL);
 106   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 107
 108   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 109
 110   border_width = GTK_CONTAINER (widget)->border_width;
 111
 112   attributes.x = widget->allocation.x + border_width;
 113   attributes.y = widget->allocation.y + border_width;
 114   attributes.width = widget->allocation.width - 2*border_width;
 115   attributes.height = widget->allocation.height - 2*border_width;
 116   attributes.window_type = GDK_WINDOW_CHILD;
 117   attributes.wclass = GDK_INPUT_OUTPUT;
 118   attributes.visual = gtk_widget_get_visual (widget);
 119   attributes.colormap = gtk_widget_get_colormap (widget);
 120   attributes.event_mask = gtk_widget_get_events (widget)
 121                         | GDK_BUTTON_MOTION_MASK
 122                         | GDK_BUTTON_PRESS_MASK
 123                         | GDK_BUTTON_RELEASE_MASK
 124                         | GDK_EXPOSURE_MASK
 125                         | GDK_ENTER_NOTIFY_MASK
 126                         | GDK_LEAVE_NOTIFY_MASK;
 127
 128   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 129
 130   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 131   gdk_window_set_user_data (widget->window, widget);
 132
 133   widget->style = gtk_style_attach (widget->style, widget->window);
 134   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 135 }
 136
 137 static void
 138 gtk_event_box_size_request (GtkWidget      *widget,
 139                         GtkRequisition *requisition)
 140 {
 141   GtkBin *bin;
 142
 143   g_return_if_fail (widget != NULL);
 144   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 145   g_return_if_fail (requisition != NULL);
 146
 147   bin = GTK_BIN (widget);
 148
 149   requisition->width = GTK_CONTAINER (widget)->border_width * 2;
 150   requisition->height = GTK_CONTAINER (widget)->border_width * 2;
 151
 152   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 153     {
 154       GtkRequisition child_requisition;
 155
 156       gtk_widget_size_request (bin->child, &child_requisition);
 157
 158       requisition->width += child_requisition.width;
 159       requisition->height += child_requisition.height;
 160     }
 161 }
 162
 163 static void
 164 gtk_event_box_size_allocate (GtkWidget     *widget,
 165                             GtkAllocation *allocation)
 166 {
 167   GtkBin *bin;
 168   GtkAllocation child_allocation;
 169
 170   g_return_if_fail (widget != NULL);
 171   g_return_if_fail (GTK_IS_EVENT_BOX (widget));
 172   g_return_if_fail (allocation != NULL);
 173
 174   widget->allocation = *allocation;
 175   bin = GTK_BIN (widget);
 176
 177   child_allocation.x = 0;
 178   child_allocation.y = 0;
 179   child_allocation.width = MAX (allocation->width - GTK_CONTAINER (widget)->border_width * 2, 0);
 180   child_allocation.height = MAX (allocation->height - GTK_CONTAINER (widget)->border_width * 2, 0);
 181
 182   if (GTK_WIDGET_REALIZED (widget))
 183     {
 184       gdk_window_move_resize (widget->window,
 185                               allocation->x + GTK_CONTAINER (widget)->border_width,
 186                               allocation->y + GTK_CONTAINER (widget)->border_width,
 187                               child_allocation.width,
 188                               child_allocation.height);
 189     }
 190
 191   if (bin->child)
 192     {
 193       gtk_widget_size_allocate (bin->child, &child_allocation);
 194     }
 195 }
 196
 197 static void
 198 gtk_event_box_paint (GtkWidget    *widget,
 199                      GdkRectangle *area)
 200 {
 201   gtk_paint_flat_box (widget->style, widget->window,
 202                       widget->state, GTK_SHADOW_NONE,
 203                       area, widget, "eventbox",
 204                       0, 0, -1, -1);
 205 }
 206
 207 static gint
 208 gtk_event_box_expose (GtkWidget      *widget,
 209                      GdkEventExpose *event)
 210 {
 211   g_return_val_if_fail (widget != NULL, FALSE);
 212   g_return_val_if_fail (GTK_IS_EVENT_BOX (widget), FALSE);
 213   g_return_val_if_fail (event != NULL, FALSE);
 214
 215   if (GTK_WIDGET_DRAWABLE (widget))
 216     {
 217       gtk_event_box_paint (widget, &event->area);
 218
 219       (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 220     }
 221
 222   return FALSE;
 223 }
 224