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 #include "gtkintl.h"
  29
  30 enum {
  31   CHILD_PROP_0,
  32   CHILD_PROP_X,
  33   CHILD_PROP_Y
  34 };
  35
  36 static void gtk_fixed_class_init    (GtkFixedClass    *klass);
  37 static void gtk_fixed_init          (GtkFixed         *fixed);
  38 static void gtk_fixed_realize       (GtkWidget        *widget);
  39 static void gtk_fixed_size_request  (GtkWidget        *widget,
  40                                      GtkRequisition   *requisition);
  41 static void gtk_fixed_size_allocate (GtkWidget        *widget,
  42                                      GtkAllocation    *allocation);
  43 static void gtk_fixed_add           (GtkContainer     *container,
  44                                      GtkWidget        *widget);
  45 static void gtk_fixed_remove        (GtkContainer     *container,
  46                                      GtkWidget        *widget);
  47 static void gtk_fixed_forall        (GtkContainer     *container,
  48                                      gboolean          include_internals,
  49                                      GtkCallback       callback,
  50                                      gpointer          callback_data);
  51 static GtkType gtk_fixed_child_type (GtkContainer     *container);
  52
  53 static void gtk_fixed_set_child_property (GtkContainer *container,
  54                                           GtkWidget    *child,
  55                                           guint         property_id,
  56                                           const GValue *value,
  57                                           GParamSpec   *pspec);
  58 static void gtk_fixed_get_child_property (GtkContainer *container,
  59                                           GtkWidget    *child,
  60                                           guint         property_id,
  61                                           GValue       *value,
  62                                           GParamSpec   *pspec);
  63
  64 static GtkContainerClass *parent_class = NULL;
  65
  66
  67 GtkType
  68 gtk_fixed_get_type (void)
  69 {
  70   static GtkType fixed_type = 0;
  71
  72   if (!fixed_type)
  73     {
  74       static const GtkTypeInfo fixed_info =
  75       {
  76         "GtkFixed",
  77         sizeof (GtkFixed),
  78         sizeof (GtkFixedClass),
  79         (GtkClassInitFunc) gtk_fixed_class_init,
  80         (GtkObjectInitFunc) gtk_fixed_init,
  81         /* reserved_1 */ NULL,
  82         /* reserved_2 */ NULL,
  83         (GtkClassInitFunc) NULL,
  84       };
  85
  86       fixed_type = gtk_type_unique (GTK_TYPE_CONTAINER, &fixed_info);
  87     }
  88
  89   return fixed_type;
  90 }
  91
  92 static void
  93 gtk_fixed_class_init (GtkFixedClass *class)
  94 {
  95   GtkObjectClass *object_class;
  96   GtkWidgetClass *widget_class;
  97   GtkContainerClass *container_class;
  98
  99   object_class = (GtkObjectClass*) class;
 100   widget_class = (GtkWidgetClass*) class;
 101   container_class = (GtkContainerClass*) class;
 102
 103   parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
 104
 105   widget_class->realize = gtk_fixed_realize;
 106   widget_class->size_request = gtk_fixed_size_request;
 107   widget_class->size_allocate = gtk_fixed_size_allocate;
 108
 109   container_class->add = gtk_fixed_add;
 110   container_class->remove = gtk_fixed_remove;
 111   container_class->forall = gtk_fixed_forall;
 112   container_class->child_type = gtk_fixed_child_type;
 113
 114   container_class->set_child_property = gtk_fixed_set_child_property;
 115   container_class->get_child_property = gtk_fixed_get_child_property;
 116
 117   gtk_container_class_install_child_property (container_class,
 118                                               CHILD_PROP_X,
 119                                               g_param_spec_int ("x",
 120                                                                 _("X position"),
 121                                                                 _("X position of child widget"),
 122                                                                 G_MININT,
 123                                                                 G_MAXINT,
 124                                                                 0,
 125                                                                 G_PARAM_READWRITE));
 126
 127   gtk_container_class_install_child_property (container_class,
 128                                               CHILD_PROP_Y,
 129                                               g_param_spec_int ("y",
 130                                                                 _("Y position"),
 131                                                                 _("Y position of child widget"),
 132                                                                 G_MININT,
 133                                                                 G_MAXINT,
 134                                                                 0,
 135                                                                 G_PARAM_READWRITE));
 136 }
 137
 138 static GtkType
 139 gtk_fixed_child_type (GtkContainer     *container)
 140 {
 141   return GTK_TYPE_WIDGET;
 142 }
 143
 144 static void
 145 gtk_fixed_init (GtkFixed *fixed)
 146 {
 147   GTK_WIDGET_SET_FLAGS (fixed, GTK_NO_WINDOW);
 148
 149   fixed->children = NULL;
 150 }
 151
 152 GtkWidget*
 153 gtk_fixed_new (void)
 154 {
 155   GtkFixed *fixed;
 156
 157   fixed = gtk_type_new (GTK_TYPE_FIXED);
 158   return GTK_WIDGET (fixed);
 159 }
 160
 161 static GtkFixedChild*
 162 get_child (GtkFixed  *fixed,
 163            GtkWidget *widget)
 164 {
 165   GList *children;
 166
 167   children = fixed->children;
 168   while (children)
 169     {
 170       GtkFixedChild *child;
 171
 172       child = children->data;
 173       children = children->next;
 174
 175       if (child->widget == widget)
 176         return child;
 177     }
 178
 179   return NULL;
 180 }
 181
 182 void
 183 gtk_fixed_put (GtkFixed       *fixed,
 184                GtkWidget      *widget,
 185                gint            x,
 186                gint            y)
 187 {
 188   GtkFixedChild *child_info;
 189
 190   g_return_if_fail (GTK_IS_FIXED (fixed));
 191   g_return_if_fail (GTK_IS_WIDGET (fixed));
 192
 193   child_info = g_new (GtkFixedChild, 1);
 194   child_info->widget = widget;
 195   child_info->x = x;
 196   child_info->y = y;
 197
 198   gtk_widget_set_parent (widget, GTK_WIDGET (fixed));
 199
 200   fixed->children = g_list_append (fixed->children, child_info);
 201 }
 202
 203 static void
 204 gtk_fixed_move_internal (GtkFixed       *fixed,
 205                          GtkWidget      *widget,
 206                          gboolean        change_x,
 207                          gint            x,
 208                          gboolean        change_y,
 209                          gint            y)
 210 {
 211   GtkFixedChild *child;
 212
 213   g_return_if_fail (GTK_IS_FIXED (fixed));
 214   g_return_if_fail (GTK_IS_WIDGET (widget));
 215   g_return_if_fail (widget->parent == GTK_WIDGET (fixed));
 216
 217   child = get_child (fixed, widget);
 218
 219   g_assert (child);
 220
 221   gtk_widget_freeze_child_notify (widget);
 222
 223   if (change_x)
 224     {
 225       child->x = x;
 226       gtk_widget_child_notify (widget, "x");
 227     }
 228
 229   if (change_y)
 230     {
 231       child->y = y;
 232       gtk_widget_child_notify (widget, "y");
 233     }
 234
 235   gtk_widget_thaw_child_notify (widget);
 236
 237   if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (fixed))
 238     gtk_widget_queue_resize (GTK_WIDGET (fixed));
 239 }
 240
 241 void
 242 gtk_fixed_move (GtkFixed       *fixed,
 243                 GtkWidget      *widget,
 244                 gint            x,
 245                 gint            y)
 246 {
 247   gtk_fixed_move_internal (fixed, widget, TRUE, x, TRUE, y);
 248 }
 249
 250 static void
 251 gtk_fixed_set_child_property (GtkContainer    *container,
 252                               GtkWidget       *child,
 253                               guint            property_id,
 254                               const GValue    *value,
 255                               GParamSpec      *pspec)
 256 {
 257   switch (property_id)
 258     {
 259     case CHILD_PROP_X:
 260       gtk_fixed_move_internal (GTK_FIXED (container),
 261                                child,
 262                                TRUE, g_value_get_int (value),
 263                                FALSE, 0);
 264       break;
 265     case CHILD_PROP_Y:
 266       gtk_fixed_move_internal (GTK_FIXED (container),
 267                                child,
 268                                FALSE, 0,
 269                                TRUE, g_value_get_int (value));
 270       break;
 271     default:
 272       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 273       break;
 274     }
 275 }
 276
 277 static void
 278 gtk_fixed_get_child_property (GtkContainer *container,
 279                               GtkWidget    *child,
 280                               guint         property_id,
 281                               GValue       *value,
 282                               GParamSpec   *pspec)
 283 {
 284   GtkFixedChild *fixed_child;
 285
 286   fixed_child = get_child (GTK_FIXED (container), child);
 287
 288   switch (property_id)
 289     {
 290     case CHILD_PROP_X:
 291       g_value_set_int (value, fixed_child->x);
 292       break;
 293     case CHILD_PROP_Y:
 294       g_value_set_int (value, fixed_child->y);
 295       break;
 296     default:
 297       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 298       break;
 299     }
 300 }
 301
 302 static void
 303 gtk_fixed_realize (GtkWidget *widget)
 304 {
 305   GdkWindowAttr attributes;
 306   gint attributes_mask;
 307
 308   if (GTK_WIDGET_NO_WINDOW (widget))
 309     GTK_WIDGET_CLASS (parent_class)->realize (widget);
 310   else
 311     {
 312       GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 313
 314       attributes.window_type = GDK_WINDOW_CHILD;
 315       attributes.x = widget->allocation.x;
 316       attributes.y = widget->allocation.y;
 317       attributes.width = widget->allocation.width;
 318       attributes.height = widget->allocation.height;
 319       attributes.wclass = GDK_INPUT_OUTPUT;
 320       attributes.visual = gtk_widget_get_visual (widget);
 321       attributes.colormap = gtk_widget_get_colormap (widget);
 322       attributes.event_mask = gtk_widget_get_events (widget);
 323       attributes.event_mask |= GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK;
 324
 325       attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 326
 327       widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes,
 328                                        attributes_mask);
 329       gdk_window_set_user_data (widget->window, widget);
 330
 331       widget->style = gtk_style_attach (widget->style, widget->window);
 332       gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
 333     }
 334 }
 335
 336 static void
 337 gtk_fixed_size_request (GtkWidget      *widget,
 338                         GtkRequisition *requisition)
 339 {
 340   GtkFixed *fixed;
 341   GtkFixedChild *child;
 342   GList *children;
 343   GtkRequisition child_requisition;
 344
 345   fixed = GTK_FIXED (widget);
 346   requisition->width = 0;
 347   requisition->height = 0;
 348
 349   children = fixed->children;
 350   while (children)
 351     {
 352       child = children->data;
 353       children = children->next;
 354
 355       if (GTK_WIDGET_VISIBLE (child->widget))
 356         {
 357           gtk_widget_size_request (child->widget, &child_requisition);
 358
 359           requisition->height = MAX (requisition->height,
 360                                      child->y +
 361                                      child_requisition.height);
 362           requisition->width = MAX (requisition->width,
 363                                     child->x +
 364                                     child_requisition.width);
 365         }
 366     }
 367
 368   requisition->height += GTK_CONTAINER (fixed)->border_width * 2;
 369   requisition->width += GTK_CONTAINER (fixed)->border_width * 2;
 370 }
 371
 372 static void
 373 gtk_fixed_size_allocate (GtkWidget     *widget,
 374                          GtkAllocation *allocation)
 375 {
 376   GtkFixed *fixed;
 377   GtkFixedChild *child;
 378   GtkAllocation child_allocation;
 379   GtkRequisition child_requisition;
 380   GList *children;
 381   guint16 border_width;
 382
 383   fixed = GTK_FIXED (widget);
 384
 385   widget->allocation = *allocation;
 386
 387   if (!GTK_WIDGET_NO_WINDOW (widget))
 388     {
 389       if (GTK_WIDGET_REALIZED (widget))
 390         gdk_window_move_resize (widget->window,
 391                                 allocation->x,
 392                                 allocation->y,
 393                                 allocation->width,
 394                                 allocation->height);
 395     }
 396
 397   border_width = GTK_CONTAINER (fixed)->border_width;
 398
 399   children = fixed->children;
 400   while (children)
 401     {
 402       child = children->data;
 403       children = children->next;
 404
 405       if (GTK_WIDGET_VISIBLE (child->widget))
 406         {
 407           gtk_widget_get_child_requisition (child->widget, &child_requisition);
 408           child_allocation.x = child->x + border_width;
 409           child_allocation.y = child->y + border_width;
 410
 411           if (GTK_WIDGET_NO_WINDOW (widget))
 412             {
 413               child_allocation.x += widget->allocation.x;
 414               child_allocation.y += widget->allocation.y;
 415             }
 416
 417           child_allocation.width = child_requisition.width;
 418           child_allocation.height = child_requisition.height;
 419           gtk_widget_size_allocate (child->widget, &child_allocation);
 420         }
 421     }
 422 }
 423
 424 static void
 425 gtk_fixed_add (GtkContainer *container,
 426                GtkWidget    *widget)
 427 {
 428   gtk_fixed_put (GTK_FIXED (container), widget, 0, 0);
 429 }
 430
 431 static void
 432 gtk_fixed_remove (GtkContainer *container,
 433                   GtkWidget    *widget)
 434 {
 435   GtkFixed *fixed;
 436   GtkFixedChild *child;
 437   GList *children;
 438
 439   fixed = GTK_FIXED (container);
 440
 441   children = fixed->children;
 442   while (children)
 443     {
 444       child = children->data;
 445
 446       if (child->widget == widget)
 447         {
 448           gboolean was_visible = GTK_WIDGET_VISIBLE (widget);
 449
 450           gtk_widget_unparent (widget);
 451
 452           fixed->children = g_list_remove_link (fixed->children, children);
 453           g_list_free (children);
 454           g_free (child);
 455
 456           if (was_visible && GTK_WIDGET_VISIBLE (container))
 457             gtk_widget_queue_resize (GTK_WIDGET (container));
 458
 459           break;
 460         }
 461
 462       children = children->next;
 463     }
 464 }
 465
 466 static void
 467 gtk_fixed_forall (GtkContainer *container,
 468                   gboolean      include_internals,
 469                   GtkCallback   callback,
 470                   gpointer      callback_data)
 471 {
 472   GtkFixed *fixed;
 473   GtkFixedChild *child;
 474   GList *children;
 475
 476   g_return_if_fail (callback != NULL);
 477
 478   fixed = GTK_FIXED (container);
 479
 480   children = fixed->children;
 481   while (children)
 482     {
 483       child = children->data;
 484       children = children->next;
 485
 486       (* callback) (child->widget, callback_data);
 487     }
 488 }
 489
 490 /**
 491  * gtk_fixed_set_has_window:
 492  * @fixed: a #GtkFixed
 493  * @has_window: %TRUE if a separate window should be created
 494  *
 495  * Sets whether a #GtkFixed widget is created with a separate
 496  * #GdkWindow for widget->window or not. (By default, it will be
 497  * created with no separate #GdkWindow). This function must be called
 498  * while the #GtkFixed is not realized, for instance, immediately after the
 499  * window is created.
 500  **/
 501 void
 502 gtk_fixed_set_has_window (GtkFixed *fixed,
 503                           gboolean  has_window)
 504 {
 505   g_return_if_fail (GTK_IS_FIXED (fixed));
 506   g_return_if_fail (!GTK_WIDGET_REALIZED (fixed));
 507
 508   if (!has_window != GTK_WIDGET_NO_WINDOW (fixed))
 509     {
 510       if (has_window)
 511         GTK_WIDGET_UNSET_FLAGS (fixed, GTK_NO_WINDOW);
 512       else
 513         GTK_WIDGET_SET_FLAGS (fixed, GTK_NO_WINDOW);
 514     }
 515 }
 516
 517 /**
 518  * gtk_fixed_get_has_window:
 519  * @fixed: a #GtkWidget
 520  *
 521  * Gets whether the #GtkFixed has it's own #GdkWindow.
 522  * See gdk_fixed_set_has_window().
 523  *
 524  * Return value: %TRUE if @fixed has its own window.
 525  **/
 526 gboolean
 527 gtk_fixed_get_has_window (GtkFixed *fixed)
 528 {
 529   g_return_val_if_fail (GTK_IS_FIXED (fixed), FALSE);
 530
 531   return !GTK_WIDGET_NO_WINDOW (fixed);
 532 }