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