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