Pileus Git - ~andy/gtk/blob - gtk/gtkfixed.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 "gtkfixed.h"
  28
  29
  30 static void gtk_fixed_class_init    (GtkFixedClass    *klass);
  31 static void gtk_fixed_init          (GtkFixed         *fixed);
  32 static void gtk_fixed_map           (GtkWidget        *widget);
  33 static void gtk_fixed_realize       (GtkWidget        *widget);
  34 static void gtk_fixed_size_request  (GtkWidget        *widget,
  35                                      GtkRequisition   *requisition);
  36 static void gtk_fixed_size_allocate (GtkWidget        *widget,
  37                                      GtkAllocation    *allocation);
  38 static void gtk_fixed_add           (GtkContainer     *container,
  39                                      GtkWidget        *widget);
  40 static void gtk_fixed_remove        (GtkContainer     *container,
  41                                      GtkWidget        *widget);
  42 static void gtk_fixed_forall        (GtkContainer     *container,
  43                                      gboolean          include_internals,
  44                                      GtkCallback       callback,
  45                                      gpointer          callback_data);
  46 static GtkType gtk_fixed_child_type (GtkContainer     *container);
  47
  48
  49 static GtkContainerClass *parent_class = NULL;
  50
  51
  52 GtkType
  53 gtk_fixed_get_type (void)
  54 {
  55   static GtkType fixed_type = 0;
  56
  57   if (!fixed_type)
  58     {
  59       static const GtkTypeInfo fixed_info =
  60       {
  61         "GtkFixed",
  62         sizeof (GtkFixed),
  63         sizeof (GtkFixedClass),
  64         (GtkClassInitFunc) gtk_fixed_class_init,
  65         (GtkObjectInitFunc) gtk_fixed_init,
  66         /* reserved_1 */ NULL,
  67         /* reserved_2 */ NULL,
  68         (GtkClassInitFunc) NULL,
  69       };
  70
  71       fixed_type = gtk_type_unique (GTK_TYPE_CONTAINER, &fixed_info);
  72     }
  73
  74   return fixed_type;
  75 }
  76
  77 static void
  78 gtk_fixed_class_init (GtkFixedClass *class)
  79 {
  80   GtkObjectClass *object_class;
  81   GtkWidgetClass *widget_class;
  82   GtkContainerClass *container_class;
  83
  84   object_class = (GtkObjectClass*) class;
  85   widget_class = (GtkWidgetClass*) class;
  86   container_class = (GtkContainerClass*) class;
  87
  88   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
  89
  90   widget_class->map = gtk_fixed_map;
  91   widget_class->realize = gtk_fixed_realize;
  92   widget_class->size_request = gtk_fixed_size_request;
  93   widget_class->size_allocate = gtk_fixed_size_allocate;
  94
  95   container_class->add = gtk_fixed_add;
  96   container_class->remove = gtk_fixed_remove;
  97   container_class->forall = gtk_fixed_forall;
  98   container_class->child_type = gtk_fixed_child_type;
  99 }
 100
 101 static GtkType
 102 gtk_fixed_child_type (GtkContainer     *container)
 103 {
 104   return GTK_TYPE_WIDGET;
 105 }
 106
 107 static void
 108 gtk_fixed_init (GtkFixed *fixed)
 109 {
 110   GTK_WIDGET_UNSET_FLAGS (fixed, GTK_NO_WINDOW);
 111
 112   fixed->children = NULL;
 113 }
 114
 115 GtkWidget*
 116 gtk_fixed_new (void)
 117 {
 118   GtkFixed *fixed;
 119
 120   fixed = gtk_type_new (GTK_TYPE_FIXED);
 121   return GTK_WIDGET (fixed);
 122 }
 123
 124 void
 125 gtk_fixed_put (GtkFixed       *fixed,
 126                GtkWidget      *widget,
 127                gint16         x,
 128                gint16         y)
 129 {
 130   GtkFixedChild *child_info;
 131
 132   g_return_if_fail (GTK_IS_FIXED (fixed));
 133   g_return_if_fail (widget != NULL);
 134
 135   child_info = g_new (GtkFixedChild, 1);
 136   child_info->widget = widget;
 137   child_info->x = x;
 138   child_info->y = y;
 139
 140   gtk_widget_set_parent (widget, GTK_WIDGET (fixed));
 141
 142   fixed->children = g_list_append (fixed->children, child_info);
 143
 144   if (GTK_WIDGET_REALIZED (fixed))
 145     gtk_widget_realize (widget);
 146
 147   if (GTK_WIDGET_VISIBLE (fixed) && GTK_WIDGET_VISIBLE (widget))
 148     {
 149       if (GTK_WIDGET_MAPPED (fixed))
 150         gtk_widget_map (widget);
 151
 152       gtk_widget_queue_resize (GTK_WIDGET (fixed));
 153     }
 154 }
 155
 156 void
 157 gtk_fixed_move (GtkFixed       *fixed,
 158                 GtkWidget      *widget,
 159                 gint16         x,
 160                 gint16         y)
 161 {
 162   GtkFixedChild *child;
 163   GList *children;
 164
 165   g_return_if_fail (GTK_IS_FIXED (fixed));
 166   g_return_if_fail (widget != NULL);
 167
 168   children = fixed->children;
 169   while (children)
 170     {
 171       child = children->data;
 172       children = children->next;
 173
 174       if (child->widget == widget)
 175         {
 176           child->x = x;
 177           child->y = y;
 178
 179           if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (fixed))
 180             gtk_widget_queue_resize (GTK_WIDGET (fixed));
 181
 182           break;
 183         }
 184     }
 185 }
 186
 187 static void
 188 gtk_fixed_map (GtkWidget *widget)
 189 {
 190   GtkFixed *fixed;
 191   GtkFixedChild *child;
 192   GList *children;
 193
 194   g_return_if_fail (GTK_IS_FIXED (widget));
 195
 196   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 197   fixed = GTK_FIXED (widget);
 198
 199   children = fixed->children;
 200   while (children)
 201     {
 202       child = children->data;
 203       children = children->next;
 204
 205       if (GTK_WIDGET_VISIBLE (child->widget) &&
 206           !GTK_WIDGET_MAPPED (child->widget))
 207         gtk_widget_map (child->widget);
 208     }
 209
 210   gdk_window_show (widget->window);
 211 }
 212
 213 static void
 214 gtk_fixed_realize (GtkWidget *widget)
 215 {
 216   GdkWindowAttr attributes;
 217   gint attributes_mask;
 218
 219   g_return_if_fail (GTK_IS_FIXED (widget));
 220
 221   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 222
 223   attributes.window_type = GDK_WINDOW_CHILD;
 224   attributes.x = widget->allocation.x;
 225   attributes.y = widget->allocation.y;
 226   attributes.width = widget->allocation.width;
 227   attributes.height = widget->allocation.height;
 228   attributes.wclass = GDK_INPUT_OUTPUT;
 229   attributes.visual = gtk_widget_get_visual (widget);
 230   attributes.colormap = gtk_widget_get_colormap (widget);
 231   attributes.event_mask = gtk_widget_get_events (widget);
 232   attributes.event_mask |= GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK;
 233
 234   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 235
 236   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes,
 237                                    attributes_mask);
 238   gdk_window_set_user_data (widget->window, widget);
 239
 240   widget->style = gtk_style_attach (widget->style, widget->window);
 241   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 242 }
 243
 244 static void
 245 gtk_fixed_size_request (GtkWidget      *widget,
 246                         GtkRequisition *requisition)
 247 {
 248   GtkFixed *fixed;
 249   GtkFixedChild *child;
 250   GList *children;
 251   GtkRequisition child_requisition;
 252
 253   g_return_if_fail (GTK_IS_FIXED (widget));
 254   g_return_if_fail (requisition != NULL);
 255
 256   fixed = GTK_FIXED (widget);
 257   requisition->width = 0;
 258   requisition->height = 0;
 259
 260   children = fixed->children;
 261   while (children)
 262     {
 263       child = children->data;
 264       children = children->next;
 265
 266       if (GTK_WIDGET_VISIBLE (child->widget))
 267         {
 268           gtk_widget_size_request (child->widget, &child_requisition);
 269
 270           requisition->height = MAX (requisition->height,
 271                                      child->y +
 272                                      child_requisition.height);
 273           requisition->width = MAX (requisition->width,
 274                                     child->x +
 275                                     child_requisition.width);
 276         }
 277     }
 278
 279   requisition->height += GTK_CONTAINER (fixed)->border_width * 2;
 280   requisition->width += GTK_CONTAINER (fixed)->border_width * 2;
 281 }
 282
 283 static void
 284 gtk_fixed_size_allocate (GtkWidget     *widget,
 285                          GtkAllocation *allocation)
 286 {
 287   GtkFixed *fixed;
 288   GtkFixedChild *child;
 289   GtkAllocation child_allocation;
 290   GtkRequisition child_requisition;
 291   GList *children;
 292   guint16 border_width;
 293
 294   g_return_if_fail (GTK_IS_FIXED(widget));
 295   g_return_if_fail (allocation != NULL);
 296
 297   fixed = GTK_FIXED (widget);
 298
 299   widget->allocation = *allocation;
 300   if (GTK_WIDGET_REALIZED (widget))
 301     gdk_window_move_resize (widget->window,
 302                             allocation->x,
 303                             allocation->y,
 304                             allocation->width,
 305                             allocation->height);
 306
 307   border_width = GTK_CONTAINER (fixed)->border_width;
 308
 309   children = fixed->children;
 310   while (children)
 311     {
 312       child = children->data;
 313       children = children->next;
 314
 315       if (GTK_WIDGET_VISIBLE (child->widget))
 316         {
 317           gtk_widget_get_child_requisition (child->widget, &child_requisition);
 318           child_allocation.x = child->x + border_width;
 319           child_allocation.y = child->y + border_width;
 320           child_allocation.width = child_requisition.width;
 321           child_allocation.height = child_requisition.height;
 322           gtk_widget_size_allocate (child->widget, &child_allocation);
 323         }
 324     }
 325 }
 326
 327 static void
 328 gtk_fixed_add (GtkContainer *container,
 329                GtkWidget    *widget)
 330 {
 331   g_return_if_fail (GTK_IS_FIXED (container));
 332   g_return_if_fail (widget != NULL);
 333
 334   gtk_fixed_put (GTK_FIXED (container), widget, 0, 0);
 335 }
 336
 337 static void
 338 gtk_fixed_remove (GtkContainer *container,
 339                   GtkWidget    *widget)
 340 {
 341   GtkFixed *fixed;
 342   GtkFixedChild *child;
 343   GList *children;
 344
 345   g_return_if_fail (GTK_IS_FIXED (container));
 346   g_return_if_fail (widget != NULL);
 347
 348   fixed = GTK_FIXED (container);
 349
 350   children = fixed->children;
 351   while (children)
 352     {
 353       child = children->data;
 354
 355       if (child->widget == widget)
 356         {
 357           gboolean was_visible = GTK_WIDGET_VISIBLE (widget);
 358
 359           gtk_widget_unparent (widget);
 360
 361           fixed->children = g_list_remove_link (fixed->children, children);
 362           g_list_free (children);
 363           g_free (child);
 364
 365           if (was_visible && GTK_WIDGET_VISIBLE (container))
 366             gtk_widget_queue_resize (GTK_WIDGET (container));
 367
 368           break;
 369         }
 370
 371       children = children->next;
 372     }
 373 }
 374
 375 static void
 376 gtk_fixed_forall (GtkContainer *container,
 377                   gboolean      include_internals,
 378                   GtkCallback   callback,
 379                   gpointer      callback_data)
 380 {
 381   GtkFixed *fixed;
 382   GtkFixedChild *child;
 383   GList *children;
 384
 385   g_return_if_fail (GTK_IS_FIXED (container));
 386   g_return_if_fail (callback != NULL);
 387
 388   fixed = GTK_FIXED (container);
 389
 390   children = fixed->children;
 391   while (children)
 392     {
 393       child = children->data;
 394       children = children->next;
 395
 396       (* callback) (child->widget, callback_data);
 397     }
 398 }