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_paint         (GtkWidget        *widget,
  39                                      GdkRectangle     *area);
  40 static gint gtk_fixed_expose        (GtkWidget        *widget,
  41                                      GdkEventExpose   *event);
  42 static void gtk_fixed_add           (GtkContainer     *container,
  43                                      GtkWidget        *widget);
  44 static void gtk_fixed_remove        (GtkContainer     *container,
  45                                      GtkWidget        *widget);
  46 static void gtk_fixed_forall        (GtkContainer     *container,
  47                                      gboolean          include_internals,
  48                                      GtkCallback       callback,
  49                                      gpointer          callback_data);
  50 static GtkType gtk_fixed_child_type (GtkContainer     *container);
  51
  52
  53 static GtkContainerClass *parent_class = NULL;
  54
  55
  56 GtkType
  57 gtk_fixed_get_type (void)
  58 {
  59   static GtkType fixed_type = 0;
  60
  61   if (!fixed_type)
  62     {
  63       static const GtkTypeInfo fixed_info =
  64       {
  65         "GtkFixed",
  66         sizeof (GtkFixed),
  67         sizeof (GtkFixedClass),
  68         (GtkClassInitFunc) gtk_fixed_class_init,
  69         (GtkObjectInitFunc) gtk_fixed_init,
  70         /* reserved_1 */ NULL,
  71         /* reserved_2 */ NULL,
  72         (GtkClassInitFunc) NULL,
  73       };
  74
  75       fixed_type = gtk_type_unique (GTK_TYPE_CONTAINER, &fixed_info);
  76     }
  77
  78   return fixed_type;
  79 }
  80
  81 static void
  82 gtk_fixed_class_init (GtkFixedClass *class)
  83 {
  84   GtkObjectClass *object_class;
  85   GtkWidgetClass *widget_class;
  86   GtkContainerClass *container_class;
  87
  88   object_class = (GtkObjectClass*) class;
  89   widget_class = (GtkWidgetClass*) class;
  90   container_class = (GtkContainerClass*) class;
  91
  92   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
  93
  94   widget_class->map = gtk_fixed_map;
  95   widget_class->realize = gtk_fixed_realize;
  96   widget_class->size_request = gtk_fixed_size_request;
  97   widget_class->size_allocate = gtk_fixed_size_allocate;
  98   widget_class->expose_event = gtk_fixed_expose;
  99
 100   container_class->add = gtk_fixed_add;
 101   container_class->remove = gtk_fixed_remove;
 102   container_class->forall = gtk_fixed_forall;
 103   container_class->child_type = gtk_fixed_child_type;
 104 }
 105
 106 static GtkType
 107 gtk_fixed_child_type (GtkContainer     *container)
 108 {
 109   return GTK_TYPE_WIDGET;
 110 }
 111
 112 static void
 113 gtk_fixed_init (GtkFixed *fixed)
 114 {
 115   GTK_WIDGET_UNSET_FLAGS (fixed, GTK_NO_WINDOW);
 116
 117   fixed->children = NULL;
 118 }
 119
 120 GtkWidget*
 121 gtk_fixed_new (void)
 122 {
 123   GtkFixed *fixed;
 124
 125   fixed = gtk_type_new (GTK_TYPE_FIXED);
 126   return GTK_WIDGET (fixed);
 127 }
 128
 129 void
 130 gtk_fixed_put (GtkFixed       *fixed,
 131                GtkWidget      *widget,
 132                gint16         x,
 133                gint16         y)
 134 {
 135   GtkFixedChild *child_info;
 136
 137   g_return_if_fail (fixed != NULL);
 138   g_return_if_fail (GTK_IS_FIXED (fixed));
 139   g_return_if_fail (widget != NULL);
 140
 141   child_info = g_new (GtkFixedChild, 1);
 142   child_info->widget = widget;
 143   child_info->x = x;
 144   child_info->y = y;
 145
 146   gtk_widget_set_parent (widget, GTK_WIDGET (fixed));
 147
 148   fixed->children = g_list_append (fixed->children, child_info);
 149
 150   if (GTK_WIDGET_REALIZED (fixed))
 151     gtk_widget_realize (widget);
 152
 153   if (GTK_WIDGET_VISIBLE (fixed) && GTK_WIDGET_VISIBLE (widget))
 154     {
 155       if (GTK_WIDGET_MAPPED (fixed))
 156         gtk_widget_map (widget);
 157
 158       gtk_widget_queue_resize (GTK_WIDGET (fixed));
 159     }
 160 }
 161
 162 void
 163 gtk_fixed_move (GtkFixed       *fixed,
 164                 GtkWidget      *widget,
 165                 gint16         x,
 166                 gint16         y)
 167 {
 168   GtkFixedChild *child;
 169   GList *children;
 170
 171   g_return_if_fail (fixed != NULL);
 172   g_return_if_fail (GTK_IS_FIXED (fixed));
 173   g_return_if_fail (widget != NULL);
 174
 175   children = fixed->children;
 176   while (children)
 177     {
 178       child = children->data;
 179       children = children->next;
 180
 181       if (child->widget == widget)
 182         {
 183           child->x = x;
 184           child->y = y;
 185
 186           if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (fixed))
 187             gtk_widget_queue_resize (GTK_WIDGET (fixed));
 188
 189           break;
 190         }
 191     }
 192 }
 193
 194 static void
 195 gtk_fixed_map (GtkWidget *widget)
 196 {
 197   GtkFixed *fixed;
 198   GtkFixedChild *child;
 199   GList *children;
 200
 201   g_return_if_fail (widget != NULL);
 202   g_return_if_fail (GTK_IS_FIXED (widget));
 203
 204   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 205   fixed = GTK_FIXED (widget);
 206
 207   children = fixed->children;
 208   while (children)
 209     {
 210       child = children->data;
 211       children = children->next;
 212
 213       if (GTK_WIDGET_VISIBLE (child->widget) &&
 214           !GTK_WIDGET_MAPPED (child->widget))
 215         gtk_widget_map (child->widget);
 216     }
 217
 218   gdk_window_show (widget->window);
 219 }
 220
 221 static void
 222 gtk_fixed_realize (GtkWidget *widget)
 223 {
 224   GdkWindowAttr attributes;
 225   gint attributes_mask;
 226
 227   g_return_if_fail (widget != NULL);
 228   g_return_if_fail (GTK_IS_FIXED (widget));
 229
 230   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 231
 232   attributes.window_type = GDK_WINDOW_CHILD;
 233   attributes.x = widget->allocation.x;
 234   attributes.y = widget->allocation.y;
 235   attributes.width = widget->allocation.width;
 236   attributes.height = widget->allocation.height;
 237   attributes.wclass = GDK_INPUT_OUTPUT;
 238   attributes.visual = gtk_widget_get_visual (widget);
 239   attributes.colormap = gtk_widget_get_colormap (widget);
 240   attributes.event_mask = gtk_widget_get_events (widget);
 241   attributes.event_mask |= GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK;
 242
 243   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 244
 245   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes,
 246                                    attributes_mask);
 247   gdk_window_set_user_data (widget->window, widget);
 248
 249   widget->style = gtk_style_attach (widget->style, widget->window);
 250   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 251 }
 252
 253 static void
 254 gtk_fixed_size_request (GtkWidget      *widget,
 255                         GtkRequisition *requisition)
 256 {
 257   GtkFixed *fixed;
 258   GtkFixedChild *child;
 259   GList *children;
 260   GtkRequisition child_requisition;
 261
 262   g_return_if_fail (widget != NULL);
 263   g_return_if_fail (GTK_IS_FIXED (widget));
 264   g_return_if_fail (requisition != NULL);
 265
 266   fixed = GTK_FIXED (widget);
 267   requisition->width = 0;
 268   requisition->height = 0;
 269
 270   children = fixed->children;
 271   while (children)
 272     {
 273       child = children->data;
 274       children = children->next;
 275
 276       if (GTK_WIDGET_VISIBLE (child->widget))
 277         {
 278           gtk_widget_size_request (child->widget, &child_requisition);
 279
 280           requisition->height = MAX (requisition->height,
 281                                      child->y +
 282                                      child_requisition.height);
 283           requisition->width = MAX (requisition->width,
 284                                     child->x +
 285                                     child_requisition.width);
 286         }
 287     }
 288
 289   requisition->height += GTK_CONTAINER (fixed)->border_width * 2;
 290   requisition->width += GTK_CONTAINER (fixed)->border_width * 2;
 291 }
 292
 293 static void
 294 gtk_fixed_size_allocate (GtkWidget     *widget,
 295                          GtkAllocation *allocation)
 296 {
 297   GtkFixed *fixed;
 298   GtkFixedChild *child;
 299   GtkAllocation child_allocation;
 300   GtkRequisition child_requisition;
 301   GList *children;
 302   guint16 border_width;
 303
 304   g_return_if_fail (widget != NULL);
 305   g_return_if_fail (GTK_IS_FIXED(widget));
 306   g_return_if_fail (allocation != NULL);
 307
 308   fixed = GTK_FIXED (widget);
 309
 310   widget->allocation = *allocation;
 311   if (GTK_WIDGET_REALIZED (widget))
 312     gdk_window_move_resize (widget->window,
 313                             allocation->x,
 314                             allocation->y,
 315                             allocation->width,
 316                             allocation->height);
 317
 318   border_width = GTK_CONTAINER (fixed)->border_width;
 319
 320   children = fixed->children;
 321   while (children)
 322     {
 323       child = children->data;
 324       children = children->next;
 325
 326       if (GTK_WIDGET_VISIBLE (child->widget))
 327         {
 328           gtk_widget_get_child_requisition (child->widget, &child_requisition);
 329           child_allocation.x = child->x + border_width;
 330           child_allocation.y = child->y + border_width;
 331           child_allocation.width = child_requisition.width;
 332           child_allocation.height = child_requisition.height;
 333           gtk_widget_size_allocate (child->widget, &child_allocation);
 334         }
 335     }
 336 }
 337
 338 static void
 339 gtk_fixed_paint (GtkWidget    *widget,
 340                  GdkRectangle *area)
 341 {
 342   g_return_if_fail (widget != NULL);
 343   g_return_if_fail (GTK_IS_FIXED (widget));
 344   g_return_if_fail (area != NULL);
 345
 346   if (GTK_WIDGET_DRAWABLE (widget))
 347     gdk_window_clear_area (widget->window,
 348                            area->x, area->y,
 349                            area->width, area->height);
 350 }
 351
 352 static gint
 353 gtk_fixed_expose (GtkWidget      *widget,
 354                   GdkEventExpose *event)
 355 {
 356   GtkFixed *fixed;
 357   GtkFixedChild *child;
 358   GdkEventExpose child_event;
 359   GList *children;
 360
 361   g_return_val_if_fail (widget != NULL, FALSE);
 362   g_return_val_if_fail (GTK_IS_FIXED (widget), FALSE);
 363   g_return_val_if_fail (event != NULL, FALSE);
 364
 365   if (GTK_WIDGET_DRAWABLE (widget))
 366     {
 367       fixed = GTK_FIXED (widget);
 368
 369       child_event = *event;
 370
 371       children = fixed->children;
 372       while (children)
 373         {
 374           child = children->data;
 375           children = children->next;
 376
 377           if (GTK_WIDGET_NO_WINDOW (child->widget) &&
 378               gtk_widget_intersect (child->widget, &event->area,
 379                                     &child_event.area))
 380             gtk_widget_event (child->widget, (GdkEvent*) &child_event);
 381         }
 382     }
 383
 384   return FALSE;
 385 }
 386
 387 static void
 388 gtk_fixed_add (GtkContainer *container,
 389                GtkWidget    *widget)
 390 {
 391   g_return_if_fail (container != NULL);
 392   g_return_if_fail (GTK_IS_FIXED (container));
 393   g_return_if_fail (widget != NULL);
 394
 395   gtk_fixed_put (GTK_FIXED (container), widget, 0, 0);
 396 }
 397
 398 static void
 399 gtk_fixed_remove (GtkContainer *container,
 400                   GtkWidget    *widget)
 401 {
 402   GtkFixed *fixed;
 403   GtkFixedChild *child;
 404   GList *children;
 405
 406   g_return_if_fail (container != NULL);
 407   g_return_if_fail (GTK_IS_FIXED (container));
 408   g_return_if_fail (widget != NULL);
 409
 410   fixed = GTK_FIXED (container);
 411
 412   children = fixed->children;
 413   while (children)
 414     {
 415       child = children->data;
 416
 417       if (child->widget == widget)
 418         {
 419           gboolean was_visible = GTK_WIDGET_VISIBLE (widget);
 420
 421           gtk_widget_unparent (widget);
 422
 423           fixed->children = g_list_remove_link (fixed->children, children);
 424           g_list_free (children);
 425           g_free (child);
 426
 427           if (was_visible && GTK_WIDGET_VISIBLE (container))
 428             gtk_widget_queue_resize (GTK_WIDGET (container));
 429
 430           break;
 431         }
 432
 433       children = children->next;
 434     }
 435 }
 436
 437 static void
 438 gtk_fixed_forall (GtkContainer *container,
 439                   gboolean      include_internals,
 440                   GtkCallback   callback,
 441                   gpointer      callback_data)
 442 {
 443   GtkFixed *fixed;
 444   GtkFixedChild *child;
 445   GList *children;
 446
 447   g_return_if_fail (container != NULL);
 448   g_return_if_fail (GTK_IS_FIXED (container));
 449   g_return_if_fail (callback != NULL);
 450
 451   fixed = GTK_FIXED (container);
 452
 453   children = fixed->children;
 454   while (children)
 455     {
 456       child = children->data;
 457       children = children->next;
 458
 459       (* callback) (child->widget, callback_data);
 460     }
 461 }