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 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 #include "gtkfixed.h"
  20
  21
  22 static void gtk_fixed_class_init    (GtkFixedClass    *klass);
  23 static void gtk_fixed_init          (GtkFixed         *fixed);
  24 static void gtk_fixed_map           (GtkWidget        *widget);
  25 static void gtk_fixed_realize       (GtkWidget        *widget);
  26 static void gtk_fixed_size_request  (GtkWidget        *widget,
  27                                      GtkRequisition   *requisition);
  28 static void gtk_fixed_size_allocate (GtkWidget        *widget,
  29                                      GtkAllocation    *allocation);
  30 static void gtk_fixed_paint         (GtkWidget        *widget,
  31                                      GdkRectangle     *area);
  32 static void gtk_fixed_draw          (GtkWidget        *widget,
  33                                      GdkRectangle     *area);
  34 static gint gtk_fixed_expose        (GtkWidget        *widget,
  35                                      GdkEventExpose   *event);
  36 static void gtk_fixed_add           (GtkContainer     *container,
  37                                      GtkWidget        *widget);
  38 static void gtk_fixed_remove        (GtkContainer     *container,
  39                                      GtkWidget        *widget);
  40 static void gtk_fixed_forall        (GtkContainer     *container,
  41                                      gboolean          include_internals,
  42                                      GtkCallback       callback,
  43                                      gpointer          callback_data);
  44 static GtkType gtk_fixed_child_type (GtkContainer     *container);
  45
  46
  47 static GtkContainerClass *parent_class = NULL;
  48
  49
  50 GtkType
  51 gtk_fixed_get_type (void)
  52 {
  53   static GtkType fixed_type = 0;
  54
  55   if (!fixed_type)
  56     {
  57       static const GtkTypeInfo fixed_info =
  58       {
  59         "GtkFixed",
  60         sizeof (GtkFixed),
  61         sizeof (GtkFixedClass),
  62         (GtkClassInitFunc) gtk_fixed_class_init,
  63         (GtkObjectInitFunc) gtk_fixed_init,
  64         /* reserved_1 */ NULL,
  65         /* reserved_2 */ NULL,
  66         (GtkClassInitFunc) NULL,
  67       };
  68
  69       fixed_type = gtk_type_unique (GTK_TYPE_CONTAINER, &fixed_info);
  70     }
  71
  72   return fixed_type;
  73 }
  74
  75 static void
  76 gtk_fixed_class_init (GtkFixedClass *class)
  77 {
  78   GtkObjectClass *object_class;
  79   GtkWidgetClass *widget_class;
  80   GtkContainerClass *container_class;
  81
  82   object_class = (GtkObjectClass*) class;
  83   widget_class = (GtkWidgetClass*) class;
  84   container_class = (GtkContainerClass*) class;
  85
  86   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
  87
  88   widget_class->map = gtk_fixed_map;
  89   widget_class->realize = gtk_fixed_realize;
  90   widget_class->size_request = gtk_fixed_size_request;
  91   widget_class->size_allocate = gtk_fixed_size_allocate;
  92   widget_class->draw = gtk_fixed_draw;
  93   widget_class->expose_event = gtk_fixed_expose;
  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 (fixed != NULL);
 133   g_return_if_fail (GTK_IS_FIXED (fixed));
 134   g_return_if_fail (widget != NULL);
 135
 136   child_info = g_new (GtkFixedChild, 1);
 137   child_info->widget = widget;
 138   child_info->x = x;
 139   child_info->y = y;
 140
 141   gtk_widget_set_parent (widget, GTK_WIDGET (fixed));
 142
 143   fixed->children = g_list_append (fixed->children, child_info);
 144
 145   if (GTK_WIDGET_REALIZED (fixed) && !GTK_WIDGET_REALIZED (widget))
 146     gtk_widget_realize (widget);
 147
 148   if (GTK_WIDGET_MAPPED (fixed) && !GTK_WIDGET_MAPPED (widget))
 149     gtk_widget_map (widget);
 150
 151   if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (fixed))
 152     gtk_widget_queue_resize (GTK_WIDGET (fixed));
 153 }
 154
 155 void
 156 gtk_fixed_move (GtkFixed       *fixed,
 157                 GtkWidget      *widget,
 158                 gint16         x,
 159                 gint16         y)
 160 {
 161   GtkFixedChild *child;
 162   GList *children;
 163
 164   g_return_if_fail (fixed != NULL);
 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 (widget != NULL);
 195   g_return_if_fail (GTK_IS_FIXED (widget));
 196
 197   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 198   fixed = GTK_FIXED (widget);
 199
 200   gdk_window_show (widget->window);
 201
 202   children = fixed->children;
 203   while (children)
 204     {
 205       child = children->data;
 206       children = children->next;
 207
 208       if (GTK_WIDGET_VISIBLE (child->widget) &&
 209           !GTK_WIDGET_MAPPED (child->widget))
 210         gtk_widget_map (child->widget);
 211     }
 212 }
 213
 214 static void
 215 gtk_fixed_realize (GtkWidget *widget)
 216 {
 217   GdkWindowAttr attributes;
 218   gint attributes_mask;
 219
 220   g_return_if_fail (widget != NULL);
 221   g_return_if_fail (GTK_IS_FIXED (widget));
 222
 223   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 224
 225   attributes.window_type = GDK_WINDOW_CHILD;
 226   attributes.x = widget->allocation.x;
 227   attributes.y = widget->allocation.y;
 228   attributes.width = widget->allocation.width;
 229   attributes.height = widget->allocation.height;
 230   attributes.wclass = GDK_INPUT_OUTPUT;
 231   attributes.visual = gtk_widget_get_visual (widget);
 232   attributes.colormap = gtk_widget_get_colormap (widget);
 233   attributes.event_mask = gtk_widget_get_events (widget);
 234   attributes.event_mask |= GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK;
 235
 236   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 237
 238   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes,
 239                                    attributes_mask);
 240   gdk_window_set_user_data (widget->window, widget);
 241
 242   widget->style = gtk_style_attach (widget->style, widget->window);
 243   gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 244 }
 245
 246 static void
 247 gtk_fixed_size_request (GtkWidget      *widget,
 248                         GtkRequisition *requisition)
 249 {
 250   GtkFixed *fixed;
 251   GtkFixedChild *child;
 252   GList *children;
 253
 254   g_return_if_fail (widget != NULL);
 255   g_return_if_fail (GTK_IS_FIXED (widget));
 256   g_return_if_fail (requisition != NULL);
 257
 258   fixed = GTK_FIXED (widget);
 259   requisition->width = 0;
 260   requisition->height = 0;
 261
 262   children = fixed->children;
 263   while (children)
 264     {
 265       child = children->data;
 266       children = children->next;
 267
 268       if (GTK_WIDGET_VISIBLE (child->widget))
 269         {
 270           gtk_widget_size_request (child->widget, &child->widget->requisition);
 271
 272           requisition->height = MAX (requisition->height,
 273                                      child->y +
 274                                      child->widget->requisition.height);
 275           requisition->width = MAX (requisition->width,
 276                                     child->x +
 277                                     child->widget->requisition.width);
 278         }
 279     }
 280
 281   requisition->height += GTK_CONTAINER (fixed)->border_width * 2;
 282   requisition->width += GTK_CONTAINER (fixed)->border_width * 2;
 283 }
 284
 285 static void
 286 gtk_fixed_size_allocate (GtkWidget     *widget,
 287                          GtkAllocation *allocation)
 288 {
 289   GtkFixed *fixed;
 290   GtkFixedChild *child;
 291   GtkAllocation child_allocation;
 292   GList *children;
 293   guint16 border_width;
 294
 295   g_return_if_fail (widget != NULL);
 296   g_return_if_fail (GTK_IS_FIXED(widget));
 297   g_return_if_fail (allocation != NULL);
 298
 299   fixed = GTK_FIXED (widget);
 300
 301   widget->allocation = *allocation;
 302   if (GTK_WIDGET_REALIZED (widget))
 303     gdk_window_move_resize (widget->window,
 304                             allocation->x,
 305                             allocation->y,
 306                             allocation->width,
 307                             allocation->height);
 308
 309   border_width = GTK_CONTAINER (fixed)->border_width;
 310
 311   children = fixed->children;
 312   while (children)
 313     {
 314       child = children->data;
 315       children = children->next;
 316
 317       if (GTK_WIDGET_VISIBLE (child->widget))
 318         {
 319           child_allocation.x = child->x + border_width;
 320           child_allocation.y = child->y + border_width;
 321           child_allocation.width = child->widget->requisition.width;
 322           child_allocation.height = child->widget->requisition.height;
 323           gtk_widget_size_allocate (child->widget, &child_allocation);
 324         }
 325     }
 326 }
 327
 328 static void
 329 gtk_fixed_paint (GtkWidget    *widget,
 330                  GdkRectangle *area)
 331 {
 332   g_return_if_fail (widget != NULL);
 333   g_return_if_fail (GTK_IS_FIXED (widget));
 334   g_return_if_fail (area != NULL);
 335
 336   if (GTK_WIDGET_DRAWABLE (widget))
 337     gdk_window_clear_area (widget->window,
 338                            area->x, area->y,
 339                            area->width, area->height);
 340 }
 341
 342 static void
 343 gtk_fixed_draw (GtkWidget    *widget,
 344                 GdkRectangle *area)
 345 {
 346   GtkFixed *fixed;
 347   GtkFixedChild *child;
 348   GdkRectangle child_area;
 349   GList *children;
 350
 351   g_return_if_fail (widget != NULL);
 352   g_return_if_fail (GTK_IS_FIXED (widget));
 353
 354   if (GTK_WIDGET_DRAWABLE (widget))
 355     {
 356       fixed = GTK_FIXED (widget);
 357       gtk_fixed_paint (widget, area);
 358
 359       children = fixed->children;
 360       while (children)
 361         {
 362           child = children->data;
 363           children = children->next;
 364
 365           if (gtk_widget_intersect (child->widget, area, &child_area))
 366             gtk_widget_draw (child->widget, &child_area);
 367         }
 368     }
 369 }
 370
 371 static gint
 372 gtk_fixed_expose (GtkWidget      *widget,
 373                   GdkEventExpose *event)
 374 {
 375   GtkFixed *fixed;
 376   GtkFixedChild *child;
 377   GdkEventExpose child_event;
 378   GList *children;
 379
 380   g_return_val_if_fail (widget != NULL, FALSE);
 381   g_return_val_if_fail (GTK_IS_FIXED (widget), FALSE);
 382   g_return_val_if_fail (event != NULL, FALSE);
 383
 384   if (GTK_WIDGET_DRAWABLE (widget))
 385     {
 386       fixed = GTK_FIXED (widget);
 387
 388       child_event = *event;
 389
 390       children = fixed->children;
 391       while (children)
 392         {
 393           child = children->data;
 394           children = children->next;
 395
 396           if (GTK_WIDGET_NO_WINDOW (child->widget) &&
 397               gtk_widget_intersect (child->widget, &event->area,
 398                                     &child_event.area))
 399             gtk_widget_event (child->widget, (GdkEvent*) &child_event);
 400         }
 401     }
 402
 403   return FALSE;
 404 }
 405
 406 static void
 407 gtk_fixed_add (GtkContainer *container,
 408                GtkWidget    *widget)
 409 {
 410   g_return_if_fail (container != NULL);
 411   g_return_if_fail (GTK_IS_FIXED (container));
 412   g_return_if_fail (widget != NULL);
 413
 414   gtk_fixed_put (GTK_FIXED (container), widget, 0, 0);
 415 }
 416
 417 static void
 418 gtk_fixed_remove (GtkContainer *container,
 419                   GtkWidget    *widget)
 420 {
 421   GtkFixed *fixed;
 422   GtkFixedChild *child;
 423   GList *children;
 424
 425   g_return_if_fail (container != NULL);
 426   g_return_if_fail (GTK_IS_FIXED (container));
 427   g_return_if_fail (widget != NULL);
 428
 429   fixed = GTK_FIXED (container);
 430
 431   children = fixed->children;
 432   while (children)
 433     {
 434       child = children->data;
 435
 436       if (child->widget == widget)
 437         {
 438           gboolean was_visible = GTK_WIDGET_VISIBLE (widget);
 439
 440           gtk_widget_unparent (widget);
 441
 442           fixed->children = g_list_remove_link (fixed->children, children);
 443           g_list_free (children);
 444           g_free (child);
 445
 446           if (was_visible && GTK_WIDGET_VISIBLE (container))
 447             gtk_widget_queue_resize (GTK_WIDGET (container));
 448
 449           break;
 450         }
 451
 452       children = children->next;
 453     }
 454 }
 455
 456 static void
 457 gtk_fixed_forall (GtkContainer *container,
 458                   gboolean      include_internals,
 459                   GtkCallback   callback,
 460                   gpointer      callback_data)
 461 {
 462   GtkFixed *fixed;
 463   GtkFixedChild *child;
 464   GList *children;
 465
 466   g_return_if_fail (container != NULL);
 467   g_return_if_fail (GTK_IS_FIXED (container));
 468   g_return_if_fail (callback != NULL);
 469
 470   fixed = GTK_FIXED (container);
 471
 472   children = fixed->children;
 473   while (children)
 474     {
 475       child = children->data;
 476       children = children->next;
 477
 478       (* callback) (child->widget, callback_data);
 479     }
 480 }