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 "gtkeventbox.h"
  28
  29
  30 static void gtk_event_box_class_init               (GtkEventBoxClass *klass);
  31 static void gtk_event_box_init                     (GtkEventBox      *event_box);
  32 static void gtk_event_box_realize                  (GtkWidget        *widget);
  33 static void gtk_event_box_size_request             (GtkWidget        *widget,
  34                                                     GtkRequisition   *requisition);
  35 static void gtk_event_box_size_allocate            (GtkWidget        *widget,
  36                                                     GtkAllocation    *allocation);
  37 static void gtk_event_box_paint                    (GtkWidget         *widget,
  38                                                     GdkRectangle      *area);
  39 static gint gtk_event_box_expose                   (GtkWidget         *widget,
  40                                                    GdkEventExpose     *event);
  41
  42
  43 static GtkBinClass *parent_class = NULL;
  44
  45 GType
  46 gtk_event_box_get_type (void)
  47 {
  48   static GType event_box_type = 0;
  49
  50   if (!event_box_type)
  51     {
  52       static const GTypeInfo event_box_info =
  53       {
  54         sizeof (GtkEventBoxClass),
  55         NULL,           /* base_init */
  56         NULL,           /* base_finalize */
  57         (GClassInitFunc) gtk_event_box_class_init,
  58         NULL,           /* class_finalize */
  59         NULL,           /* class_data */
  60         sizeof (GtkEventBox),
  61         0,              /* n_preallocs */
  62         (GInstanceInitFunc) gtk_event_box_init,
  63       };
  64
  65       event_box_type = g_type_register_static (GTK_TYPE_BIN, "GtkEventBox",
  66                                                &event_box_info, 0);
  67     }
  68
  69   return event_box_type;
  70 }
  71
  72 static void
  73 gtk_event_box_class_init (GtkEventBoxClass *class)
  74 {
  75   GtkWidgetClass *widget_class;
  76
  77   parent_class = g_type_class_peek_parent (class);
  78
  79   widget_class = (GtkWidgetClass*) class;
  80
  81   widget_class->realize = gtk_event_box_realize;
  82   widget_class->size_request = gtk_event_box_size_request;
  83   widget_class->size_allocate = gtk_event_box_size_allocate;
  84   widget_class->expose_event = gtk_event_box_expose;
  85 }
  86
  87 static void
  88 gtk_event_box_init (GtkEventBox *event_box)
  89 {
  90   GTK_WIDGET_UNSET_FLAGS (event_box, GTK_NO_WINDOW);
  91 }
  92
  93 GtkWidget*
  94 gtk_event_box_new (void)
  95 {
  96   return g_object_new (GTK_TYPE_EVENT_BOX, NULL);
  97 }
  98
  99 static void
 100 gtk_event_box_realize (GtkWidget *widget)
 101 {
 102   GdkWindowAttr attributes;
 103   gint attributes_mask;
 104   gint border_width;
 105
 106   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 107
 108   border_width = GTK_CONTAINER (widget)->border_width;
 109
 110   attributes.x = widget->allocation.x + border_width;
 111   attributes.y = widget->allocation.y + border_width;
 112   attributes.width = widget->allocation.width - 2*border_width;
 113   attributes.height = widget->allocation.height - 2*border_width;
 114   attributes.window_type = GDK_WINDOW_CHILD;
 115   attributes.wclass = GDK_INPUT_OUTPUT;
 116   attributes.visual = gtk_widget_get_visual (widget);
 117   attributes.colormap = gtk_widget_get_colormap (widget);
 118   attributes.event_mask = gtk_widget_get_events (widget)
 119                         | GDK_BUTTON_MOTION_MASK
 120                         | GDK_BUTTON_PRESS_MASK
 121                         | GDK_BUTTON_RELEASE_MASK
 122                         | GDK_EXPOSURE_MASK
 123                         | GDK_ENTER_NOTIFY_MASK
 124                         | GDK_LEAVE_NOTIFY_MASK;
 125
 126   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 127
 128   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
 129   gdk_window_set_user_data (widget->window, widget);
 130
 131   widget->style = gtk_style_attach (widget->style, widget->window);
 132   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 133 }
 134
 135 static void
 136 gtk_event_box_size_request (GtkWidget      *widget,
 137                             GtkRequisition *requisition)
 138 {
 139   GtkBin *bin = GTK_BIN (widget);
 140
 141   requisition->width = GTK_CONTAINER (widget)->border_width * 2;
 142   requisition->height = GTK_CONTAINER (widget)->border_width * 2;
 143
 144   if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
 145     {
 146       GtkRequisition child_requisition;
 147
 148       gtk_widget_size_request (bin->child, &child_requisition);
 149
 150       requisition->width += child_requisition.width;
 151       requisition->height += child_requisition.height;
 152     }
 153 }
 154
 155 static void
 156 gtk_event_box_size_allocate (GtkWidget     *widget,
 157                             GtkAllocation *allocation)
 158 {
 159   GtkBin *bin;
 160   GtkAllocation child_allocation;
 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_paint (GtkWidget    *widget,
 187                      GdkRectangle *area)
 188 {
 189   if (!GTK_WIDGET_APP_PAINTABLE (widget))
 190     gtk_paint_flat_box (widget->style, widget->window,
 191                         widget->state, GTK_SHADOW_NONE,
 192                         area, widget, "eventbox",
 193                         0, 0, -1, -1);
 194 }
 195
 196 static gint
 197 gtk_event_box_expose (GtkWidget      *widget,
 198                      GdkEventExpose *event)
 199 {
 200   if (GTK_WIDGET_DRAWABLE (widget))
 201     {
 202       gtk_event_box_paint (widget, &event->area);
 203
 204       (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 205     }
 206
 207   return FALSE;
 208 }
 209