Pileus Git - ~andy/gtk/blob - gtk/gtklayout.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  * GtkLayout: Widget for scrolling of arbitrary-sized areas.
  20  *
  21  * Copyright Owen Taylor, 1998
  22  */
  23
  24 /*
  25  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  26  * file for a list of people on the GTK+ Team.  See the ChangeLog
  27  * files for a list of changes.  These files are distributed with
  28  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  29  */
  30
  31 #include "config.h"
  32 #include "gdkconfig.h"
  33
  34 #include "gtklayout.h"
  35 #include "gtkprivate.h"
  36 #include "gtkintl.h"
  37 #include "gtkmarshalers.h"
  38 #include "gtkalias.h"
  39
  40 typedef struct _GtkLayoutChild   GtkLayoutChild;
  41
  42 struct _GtkLayoutChild {
  43   GtkWidget *widget;
  44   gint x;
  45   gint y;
  46 };
  47
  48 enum {
  49    PROP_0,
  50    PROP_HADJUSTMENT,
  51    PROP_VADJUSTMENT,
  52    PROP_WIDTH,
  53    PROP_HEIGHT
  54 };
  55
  56 enum {
  57   CHILD_PROP_0,
  58   CHILD_PROP_X,
  59   CHILD_PROP_Y
  60 };
  61
  62 static void gtk_layout_get_property       (GObject        *object,
  63                                            guint           prop_id,
  64                                            GValue         *value,
  65                                            GParamSpec     *pspec);
  66 static void gtk_layout_set_property       (GObject        *object,
  67                                            guint           prop_id,
  68                                            const GValue   *value,
  69                                            GParamSpec     *pspec);
  70 static GObject *gtk_layout_constructor    (GType                  type,
  71                                            guint                  n_properties,
  72                                            GObjectConstructParam *properties);
  73 static void gtk_layout_finalize           (GObject        *object);
  74 static void gtk_layout_realize            (GtkWidget      *widget);
  75 static void gtk_layout_unrealize          (GtkWidget      *widget);
  76 static void gtk_layout_map                (GtkWidget      *widget);
  77 static void gtk_layout_size_request       (GtkWidget      *widget,
  78                                            GtkRequisition *requisition);
  79 static void gtk_layout_size_allocate      (GtkWidget      *widget,
  80                                            GtkAllocation  *allocation);
  81 static gint gtk_layout_expose             (GtkWidget      *widget,
  82                                            GdkEventExpose *event);
  83 static void gtk_layout_add                (GtkContainer   *container,
  84                                            GtkWidget      *widget);
  85 static void gtk_layout_remove             (GtkContainer   *container,
  86                                            GtkWidget      *widget);
  87 static void gtk_layout_forall             (GtkContainer   *container,
  88                                            gboolean        include_internals,
  89                                            GtkCallback     callback,
  90                                            gpointer        callback_data);
  91 static void gtk_layout_set_adjustments    (GtkLayout      *layout,
  92                                            GtkAdjustment  *hadj,
  93                                            GtkAdjustment  *vadj);
  94 static void gtk_layout_set_child_property (GtkContainer   *container,
  95                                            GtkWidget      *child,
  96                                            guint           property_id,
  97                                            const GValue   *value,
  98                                            GParamSpec     *pspec);
  99 static void gtk_layout_get_child_property (GtkContainer   *container,
 100                                            GtkWidget      *child,
 101                                            guint           property_id,
 102                                            GValue         *value,
 103                                            GParamSpec     *pspec);
 104 static void gtk_layout_allocate_child     (GtkLayout      *layout,
 105                                            GtkLayoutChild *child);
 106 static void gtk_layout_adjustment_changed (GtkAdjustment  *adjustment,
 107                                            GtkLayout      *layout);
 108 static void gtk_layout_style_set          (GtkWidget      *widget,
 109                                            GtkStyle       *old_style);
 110
 111 static void gtk_layout_set_adjustment_upper (GtkAdjustment *adj,
 112                                              gdouble        upper,
 113                                              gboolean       always_emit_changed);
 114
 115 G_DEFINE_TYPE (GtkLayout, gtk_layout, GTK_TYPE_CONTAINER)
 116
 117 /* Public interface
 118  */
 119 /**
 120  * gtk_layout_new:
 121  * @hadjustment: (allow-none): horizontal scroll adjustment, or %NULL
 122  * @vadjustment: (allow-none): vertical scroll adjustment, or %NULL
 123  *
 124  * Creates a new #GtkLayout. Unless you have a specific adjustment
 125  * you'd like the layout to use for scrolling, pass %NULL for
 126  * @hadjustment and @vadjustment.
 127  *
 128  * Return value: a new #GtkLayout
 129  **/
 130
 131 GtkWidget*
 132 gtk_layout_new (GtkAdjustment *hadjustment,
 133                 GtkAdjustment *vadjustment)
 134 {
 135   GtkLayout *layout;
 136
 137   layout = g_object_new (GTK_TYPE_LAYOUT,
 138                          "hadjustment", hadjustment,
 139                          "vadjustment", vadjustment,
 140                          NULL);
 141
 142   return GTK_WIDGET (layout);
 143 }
 144
 145 /**
 146  * gtk_layout_get_bin_window:
 147  * @layout: a #GtkLayout
 148  *
 149  * Retrieve the bin window of the layout used for drawing operations.
 150  *
 151  * Return value: a #GdkWindow
 152  *
 153  * Since: 2.14
 154  **/
 155 GdkWindow*
 156 gtk_layout_get_bin_window (GtkLayout *layout)
 157 {
 158   g_return_val_if_fail (GTK_IS_LAYOUT (layout), NULL);
 159
 160   return layout->bin_window;
 161 }
 162
 163 /**
 164  * gtk_layout_get_hadjustment:
 165  * @layout: a #GtkLayout
 166  *
 167  * This function should only be called after the layout has been
 168  * placed in a #GtkScrolledWindow or otherwise configured for
 169  * scrolling. It returns the #GtkAdjustment used for communication
 170  * between the horizontal scrollbar and @layout.
 171  *
 172  * See #GtkScrolledWindow, #GtkScrollbar, #GtkAdjustment for details.
 173  *
 174  * Return value: horizontal scroll adjustment
 175  **/
 176 GtkAdjustment*
 177 gtk_layout_get_hadjustment (GtkLayout     *layout)
 178 {
 179   g_return_val_if_fail (GTK_IS_LAYOUT (layout), NULL);
 180
 181   return layout->hadjustment;
 182 }
 183 /**
 184  * gtk_layout_get_vadjustment:
 185  * @layout: a #GtkLayout
 186  *
 187  * This function should only be called after the layout has been
 188  * placed in a #GtkScrolledWindow or otherwise configured for
 189  * scrolling. It returns the #GtkAdjustment used for communication
 190  * between the vertical scrollbar and @layout.
 191  *
 192  * See #GtkScrolledWindow, #GtkScrollbar, #GtkAdjustment for details.
 193  *
 194  * Return value: vertical scroll adjustment
 195  **/
 196 GtkAdjustment*
 197 gtk_layout_get_vadjustment (GtkLayout     *layout)
 198 {
 199   g_return_val_if_fail (GTK_IS_LAYOUT (layout), NULL);
 200
 201   return layout->vadjustment;
 202 }
 203
 204 static GtkAdjustment *
 205 new_default_adjustment (void)
 206 {
 207   return GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
 208 }
 209
 210 static void
 211 gtk_layout_set_adjustments (GtkLayout     *layout,
 212                             GtkAdjustment *hadj,
 213                             GtkAdjustment *vadj)
 214 {
 215   gboolean need_adjust = FALSE;
 216
 217   g_return_if_fail (GTK_IS_LAYOUT (layout));
 218
 219   if (hadj)
 220     g_return_if_fail (GTK_IS_ADJUSTMENT (hadj));
 221   else if (layout->hadjustment)
 222     hadj = new_default_adjustment ();
 223   if (vadj)
 224     g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
 225   else if (layout->vadjustment)
 226     vadj = new_default_adjustment ();
 227
 228   if (layout->hadjustment && (layout->hadjustment != hadj))
 229     {
 230       g_signal_handlers_disconnect_by_func (layout->hadjustment,
 231                                             gtk_layout_adjustment_changed,
 232                                             layout);
 233       g_object_unref (layout->hadjustment);
 234     }
 235
 236   if (layout->vadjustment && (layout->vadjustment != vadj))
 237     {
 238       g_signal_handlers_disconnect_by_func (layout->vadjustment,
 239                                             gtk_layout_adjustment_changed,
 240                                             layout);
 241       g_object_unref (layout->vadjustment);
 242     }
 243
 244   if (layout->hadjustment != hadj)
 245     {
 246       layout->hadjustment = hadj;
 247       g_object_ref_sink (layout->hadjustment);
 248       gtk_layout_set_adjustment_upper (layout->hadjustment, layout->width, FALSE);
 249
 250       g_signal_connect (layout->hadjustment, "value-changed",
 251                         G_CALLBACK (gtk_layout_adjustment_changed),
 252                         layout);
 253       need_adjust = TRUE;
 254     }
 255
 256   if (layout->vadjustment != vadj)
 257     {
 258       layout->vadjustment = vadj;
 259       g_object_ref_sink (layout->vadjustment);
 260       gtk_layout_set_adjustment_upper (layout->vadjustment, layout->height, FALSE);
 261
 262       g_signal_connect (layout->vadjustment, "value-changed",
 263                         G_CALLBACK (gtk_layout_adjustment_changed),
 264                         layout);
 265       need_adjust = TRUE;
 266     }
 267
 268   /* vadj or hadj can be NULL while constructing; don't emit a signal
 269      then */
 270   if (need_adjust && vadj && hadj)
 271     gtk_layout_adjustment_changed (NULL, layout);
 272 }
 273
 274 static void
 275 gtk_layout_finalize (GObject *object)
 276 {
 277   GtkLayout *layout = GTK_LAYOUT (object);
 278
 279   g_object_unref (layout->hadjustment);
 280   g_object_unref (layout->vadjustment);
 281
 282   G_OBJECT_CLASS (gtk_layout_parent_class)->finalize (object);
 283 }
 284
 285 /**
 286  * gtk_layout_set_hadjustment:
 287  * @layout: a #GtkLayout
 288  * @adjustment: (allow-none): new scroll adjustment
 289  *
 290  * Sets the horizontal scroll adjustment for the layout.
 291  *
 292  * See #GtkScrolledWindow, #GtkScrollbar, #GtkAdjustment for details.
 293  *
 294  **/
 295 void
 296 gtk_layout_set_hadjustment (GtkLayout     *layout,
 297                             GtkAdjustment *adjustment)
 298 {
 299   g_return_if_fail (GTK_IS_LAYOUT (layout));
 300
 301   gtk_layout_set_adjustments (layout, adjustment, layout->vadjustment);
 302   g_object_notify (G_OBJECT (layout), "hadjustment");
 303 }
 304
 305 /**
 306  * gtk_layout_set_vadjustment:
 307  * @layout: a #GtkLayout
 308  * @adjustment: (allow-none): new scroll adjustment
 309  *
 310  * Sets the vertical scroll adjustment for the layout.
 311  *
 312  * See #GtkScrolledWindow, #GtkScrollbar, #GtkAdjustment for details.
 313  *
 314  **/
 315 void
 316 gtk_layout_set_vadjustment (GtkLayout     *layout,
 317                             GtkAdjustment *adjustment)
 318 {
 319   g_return_if_fail (GTK_IS_LAYOUT (layout));
 320
 321   gtk_layout_set_adjustments (layout, layout->hadjustment, adjustment);
 322   g_object_notify (G_OBJECT (layout), "vadjustment");
 323 }
 324
 325 static GtkLayoutChild*
 326 get_child (GtkLayout  *layout,
 327            GtkWidget  *widget)
 328 {
 329   GList *children;
 330
 331   children = layout->children;
 332   while (children)
 333     {
 334       GtkLayoutChild *child;
 335
 336       child = children->data;
 337       children = children->next;
 338
 339       if (child->widget == widget)
 340         return child;
 341     }
 342
 343   return NULL;
 344 }
 345
 346 /**
 347  * gtk_layout_put:
 348  * @layout: a #GtkLayout
 349  * @child_widget: child widget
 350  * @x: X position of child widget
 351  * @y: Y position of child widget
 352  *
 353  * Adds @child_widget to @layout, at position (@x,@y).
 354  * @layout becomes the new parent container of @child_widget.
 355  *
 356  **/
 357 void
 358 gtk_layout_put (GtkLayout     *layout,
 359                 GtkWidget     *child_widget,
 360                 gint           x,
 361                 gint           y)
 362 {
 363   GtkLayoutChild *child;
 364
 365   g_return_if_fail (GTK_IS_LAYOUT (layout));
 366   g_return_if_fail (GTK_IS_WIDGET (child_widget));
 367
 368   child = g_new (GtkLayoutChild, 1);
 369
 370   child->widget = child_widget;
 371   child->x = x;
 372   child->y = y;
 373
 374   layout->children = g_list_append (layout->children, child);
 375
 376   if (GTK_WIDGET_REALIZED (layout))
 377     gtk_widget_set_parent_window (child->widget, layout->bin_window);
 378
 379   gtk_widget_set_parent (child_widget, GTK_WIDGET (layout));
 380 }
 381
 382 static void
 383 gtk_layout_move_internal (GtkLayout       *layout,
 384                           GtkWidget       *widget,
 385                           gboolean         change_x,
 386                           gint             x,
 387                           gboolean         change_y,
 388                           gint             y)
 389 {
 390   GtkLayoutChild *child;
 391
 392   child = get_child (layout, widget);
 393
 394   g_assert (child);
 395
 396   gtk_widget_freeze_child_notify (widget);
 397
 398   if (change_x)
 399     {
 400       child->x = x;
 401       gtk_widget_child_notify (widget, "x");
 402     }
 403
 404   if (change_y)
 405     {
 406       child->y = y;
 407       gtk_widget_child_notify (widget, "y");
 408     }
 409
 410   gtk_widget_thaw_child_notify (widget);
 411
 412   if (gtk_widget_get_visible (widget) &&
 413       gtk_widget_get_visible (GTK_WIDGET (layout)))
 414     gtk_widget_queue_resize (widget);
 415 }
 416
 417 /**
 418  * gtk_layout_move:
 419  * @layout: a #GtkLayout
 420  * @child_widget: a current child of @layout
 421  * @x: X position to move to
 422  * @y: Y position to move to
 423  *
 424  * Moves a current child of @layout to a new position.
 425  *
 426  **/
 427 void
 428 gtk_layout_move (GtkLayout     *layout,
 429                  GtkWidget     *child_widget,
 430                  gint           x,
 431                  gint           y)
 432 {
 433   g_return_if_fail (GTK_IS_LAYOUT (layout));
 434   g_return_if_fail (GTK_IS_WIDGET (child_widget));
 435   g_return_if_fail (child_widget->parent == GTK_WIDGET (layout));
 436
 437   gtk_layout_move_internal (layout, child_widget, TRUE, x, TRUE, y);
 438 }
 439
 440 static void
 441 gtk_layout_set_adjustment_upper (GtkAdjustment *adj,
 442                                  gdouble        upper,
 443                                  gboolean       always_emit_changed)
 444 {
 445   gboolean changed = FALSE;
 446   gboolean value_changed = FALSE;
 447
 448   gdouble min = MAX (0., upper - adj->page_size);
 449
 450   if (upper != adj->upper)
 451     {
 452       adj->upper = upper;
 453       changed = TRUE;
 454     }
 455
 456   if (adj->value > min)
 457     {
 458       adj->value = min;
 459       value_changed = TRUE;
 460     }
 461
 462   if (changed || always_emit_changed)
 463     gtk_adjustment_changed (adj);
 464   if (value_changed)
 465     gtk_adjustment_value_changed (adj);
 466 }
 467
 468 /**
 469  * gtk_layout_set_size:
 470  * @layout: a #GtkLayout
 471  * @width: width of entire scrollable area
 472  * @height: height of entire scrollable area
 473  *
 474  * Sets the size of the scrollable area of the layout.
 475  *
 476  **/
 477 void
 478 gtk_layout_set_size (GtkLayout     *layout,
 479                      guint          width,
 480                      guint          height)
 481 {
 482   GtkWidget *widget;
 483
 484   g_return_if_fail (GTK_IS_LAYOUT (layout));
 485
 486   widget = GTK_WIDGET (layout);
 487
 488   g_object_freeze_notify (G_OBJECT (layout));
 489   if (width != layout->width)
 490      {
 491         layout->width = width;
 492         g_object_notify (G_OBJECT (layout), "width");
 493      }
 494   if (height != layout->height)
 495      {
 496         layout->height = height;
 497         g_object_notify (G_OBJECT (layout), "height");
 498      }
 499   g_object_thaw_notify (G_OBJECT (layout));
 500
 501   if (layout->hadjustment)
 502     gtk_layout_set_adjustment_upper (layout->hadjustment, layout->width, FALSE);
 503   if (layout->vadjustment)
 504     gtk_layout_set_adjustment_upper (layout->vadjustment, layout->height, FALSE);
 505
 506   if (GTK_WIDGET_REALIZED (layout))
 507     {
 508       width = MAX (width, widget->allocation.width);
 509       height = MAX (height, widget->allocation.height);
 510       gdk_window_resize (layout->bin_window, width, height);
 511     }
 512 }
 513
 514 /**
 515  * gtk_layout_get_size:
 516  * @layout: a #GtkLayout
 517  * @width: (allow-none): location to store the width set on @layout, or %NULL
 518  * @height: (allow-none): location to store the height set on @layout, or %NULL
 519  *
 520  * Gets the size that has been set on the layout, and that determines
 521  * the total extents of the layout's scrollbar area. See
 522  * gtk_layout_set_size ().
 523  **/
 524 void
 525 gtk_layout_get_size (GtkLayout *layout,
 526                      guint     *width,
 527                      guint     *height)
 528 {
 529   g_return_if_fail (GTK_IS_LAYOUT (layout));
 530
 531   if (width)
 532     *width = layout->width;
 533   if (height)
 534     *height = layout->height;
 535 }
 536
 537 /**
 538  * gtk_layout_freeze:
 539  * @layout: a #GtkLayout
 540  *
 541  * This is a deprecated function, it doesn't do anything useful.
 542  **/
 543 void
 544 gtk_layout_freeze (GtkLayout *layout)
 545 {
 546   g_return_if_fail (GTK_IS_LAYOUT (layout));
 547
 548   layout->freeze_count++;
 549 }
 550
 551 /**
 552  * gtk_layout_thaw:
 553  * @layout: a #GtkLayout
 554  *
 555  * This is a deprecated function, it doesn't do anything useful.
 556  **/
 557 void
 558 gtk_layout_thaw (GtkLayout *layout)
 559 {
 560   g_return_if_fail (GTK_IS_LAYOUT (layout));
 561
 562   if (layout->freeze_count)
 563     {
 564       if (!(--layout->freeze_count))
 565         {
 566           gtk_widget_queue_draw (GTK_WIDGET (layout));
 567           gdk_window_process_updates (GTK_WIDGET (layout)->window, TRUE);
 568         }
 569     }
 570
 571 }
 572
 573 /* Basic Object handling procedures
 574  */
 575 static void
 576 gtk_layout_class_init (GtkLayoutClass *class)
 577 {
 578   GObjectClass *gobject_class;
 579   GtkWidgetClass *widget_class;
 580   GtkContainerClass *container_class;
 581
 582   gobject_class = (GObjectClass*) class;
 583   widget_class = (GtkWidgetClass*) class;
 584   container_class = (GtkContainerClass*) class;
 585
 586   gobject_class->set_property = gtk_layout_set_property;
 587   gobject_class->get_property = gtk_layout_get_property;
 588   gobject_class->finalize = gtk_layout_finalize;
 589   gobject_class->constructor = gtk_layout_constructor;
 590
 591   container_class->set_child_property = gtk_layout_set_child_property;
 592   container_class->get_child_property = gtk_layout_get_child_property;
 593
 594   gtk_container_class_install_child_property (container_class,
 595                                               CHILD_PROP_X,
 596                                               g_param_spec_int ("x",
 597                                                                 P_("X position"),
 598                                                                 P_("X position of child widget"),
 599                                                                 G_MININT,
 600                                                                 G_MAXINT,
 601                                                                 0,
 602                                                                 GTK_PARAM_READWRITE));
 603
 604   gtk_container_class_install_child_property (container_class,
 605                                               CHILD_PROP_Y,
 606                                               g_param_spec_int ("y",
 607                                                                 P_("Y position"),
 608                                                                 P_("Y position of child widget"),
 609                                                                 G_MININT,
 610                                                                 G_MAXINT,
 611                                                                 0,
 612                                                                 GTK_PARAM_READWRITE));
 613
 614   g_object_class_install_property (gobject_class,
 615                                    PROP_HADJUSTMENT,
 616                                    g_param_spec_object ("hadjustment",
 617                                                         P_("Horizontal adjustment"),
 618                                                         P_("The GtkAdjustment for the horizontal position"),
 619                                                         GTK_TYPE_ADJUSTMENT,
 620                                                         GTK_PARAM_READWRITE));
 621
 622   g_object_class_install_property (gobject_class,
 623                                    PROP_VADJUSTMENT,
 624                                    g_param_spec_object ("vadjustment",
 625                                                         P_("Vertical adjustment"),
 626                                                         P_("The GtkAdjustment for the vertical position"),
 627                                                         GTK_TYPE_ADJUSTMENT,
 628                                                         GTK_PARAM_READWRITE));
 629
 630   g_object_class_install_property (gobject_class,
 631                                    PROP_WIDTH,
 632                                    g_param_spec_uint ("width",
 633                                                      P_("Width"),
 634                                                      P_("The width of the layout"),
 635                                                      0,
 636                                                      G_MAXINT,
 637                                                      100,
 638                                                      GTK_PARAM_READWRITE));
 639   g_object_class_install_property (gobject_class,
 640                                    PROP_HEIGHT,
 641                                    g_param_spec_uint ("height",
 642                                                      P_("Height"),
 643                                                      P_("The height of the layout"),
 644                                                      0,
 645                                                      G_MAXINT,
 646                                                      100,
 647                                                      GTK_PARAM_READWRITE));
 648   widget_class->realize = gtk_layout_realize;
 649   widget_class->unrealize = gtk_layout_unrealize;
 650   widget_class->map = gtk_layout_map;
 651   widget_class->size_request = gtk_layout_size_request;
 652   widget_class->size_allocate = gtk_layout_size_allocate;
 653   widget_class->expose_event = gtk_layout_expose;
 654   widget_class->style_set = gtk_layout_style_set;
 655
 656   container_class->add = gtk_layout_add;
 657   container_class->remove = gtk_layout_remove;
 658   container_class->forall = gtk_layout_forall;
 659
 660   class->set_scroll_adjustments = gtk_layout_set_adjustments;
 661
 662   /**
 663    * GtkLayout::set-scroll-adjustments
 664    * @horizontal: the horizontal #GtkAdjustment
 665    * @vertical: the vertical #GtkAdjustment
 666    *
 667    * Set the scroll adjustments for the layout. Usually scrolled containers
 668    * like #GtkScrolledWindow will emit this signal to connect two instances
 669    * of #GtkScrollbar to the scroll directions of the #GtkLayout.
 670    */
 671   widget_class->set_scroll_adjustments_signal =
 672     g_signal_new (I_("set-scroll-adjustments"),
 673                   G_OBJECT_CLASS_TYPE (gobject_class),
 674                   G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
 675                   G_STRUCT_OFFSET (GtkLayoutClass, set_scroll_adjustments),
 676                   NULL, NULL,
 677                   _gtk_marshal_VOID__OBJECT_OBJECT,
 678                   G_TYPE_NONE, 2,
 679                   GTK_TYPE_ADJUSTMENT,
 680                   GTK_TYPE_ADJUSTMENT);
 681 }
 682
 683 static void
 684 gtk_layout_get_property (GObject     *object,
 685                          guint        prop_id,
 686                          GValue      *value,
 687                          GParamSpec  *pspec)
 688 {
 689   GtkLayout *layout = GTK_LAYOUT (object);
 690
 691   switch (prop_id)
 692     {
 693     case PROP_HADJUSTMENT:
 694       g_value_set_object (value, layout->hadjustment);
 695       break;
 696     case PROP_VADJUSTMENT:
 697       g_value_set_object (value, layout->vadjustment);
 698       break;
 699     case PROP_WIDTH:
 700       g_value_set_uint (value, layout->width);
 701       break;
 702     case PROP_HEIGHT:
 703       g_value_set_uint (value, layout->height);
 704       break;
 705     default:
 706       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 707       break;
 708     }
 709 }
 710
 711 static void
 712 gtk_layout_set_property (GObject      *object,
 713                          guint         prop_id,
 714                          const GValue *value,
 715                          GParamSpec   *pspec)
 716 {
 717   GtkLayout *layout = GTK_LAYOUT (object);
 718
 719   switch (prop_id)
 720     {
 721     case PROP_HADJUSTMENT:
 722       gtk_layout_set_hadjustment (layout,
 723                                   (GtkAdjustment*) g_value_get_object (value));
 724       break;
 725     case PROP_VADJUSTMENT:
 726       gtk_layout_set_vadjustment (layout,
 727                                   (GtkAdjustment*) g_value_get_object (value));
 728       break;
 729     case PROP_WIDTH:
 730       gtk_layout_set_size (layout, g_value_get_uint (value),
 731                            layout->height);
 732       break;
 733     case PROP_HEIGHT:
 734       gtk_layout_set_size (layout, layout->width,
 735                            g_value_get_uint (value));
 736       break;
 737     default:
 738       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 739       break;
 740     }
 741 }
 742
 743 static void
 744 gtk_layout_set_child_property (GtkContainer    *container,
 745                                GtkWidget       *child,
 746                                guint            property_id,
 747                                const GValue    *value,
 748                                GParamSpec      *pspec)
 749 {
 750   switch (property_id)
 751     {
 752     case CHILD_PROP_X:
 753       gtk_layout_move_internal (GTK_LAYOUT (container),
 754                                 child,
 755                                 TRUE, g_value_get_int (value),
 756                                 FALSE, 0);
 757       break;
 758     case CHILD_PROP_Y:
 759       gtk_layout_move_internal (GTK_LAYOUT (container),
 760                                 child,
 761                                 FALSE, 0,
 762                                 TRUE, g_value_get_int (value));
 763       break;
 764     default:
 765       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 766       break;
 767     }
 768 }
 769
 770 static void
 771 gtk_layout_get_child_property (GtkContainer *container,
 772                                GtkWidget    *child,
 773                                guint         property_id,
 774                                GValue       *value,
 775                                GParamSpec   *pspec)
 776 {
 777   GtkLayoutChild *layout_child;
 778
 779   layout_child = get_child (GTK_LAYOUT (container), child);
 780
 781   switch (property_id)
 782     {
 783     case CHILD_PROP_X:
 784       g_value_set_int (value, layout_child->x);
 785       break;
 786     case CHILD_PROP_Y:
 787       g_value_set_int (value, layout_child->y);
 788       break;
 789     default:
 790       GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
 791       break;
 792     }
 793 }
 794
 795 static void
 796 gtk_layout_init (GtkLayout *layout)
 797 {
 798   layout->children = NULL;
 799
 800   layout->width = 100;
 801   layout->height = 100;
 802
 803   layout->hadjustment = NULL;
 804   layout->vadjustment = NULL;
 805
 806   layout->bin_window = NULL;
 807
 808   layout->scroll_x = 0;
 809   layout->scroll_y = 0;
 810   layout->visibility = GDK_VISIBILITY_PARTIAL;
 811
 812   layout->freeze_count = 0;
 813 }
 814
 815 static GObject *
 816 gtk_layout_constructor (GType                  type,
 817                         guint                  n_properties,
 818                         GObjectConstructParam *properties)
 819 {
 820   GtkLayout *layout;
 821   GObject *object;
 822   GtkAdjustment *hadj, *vadj;
 823
 824   object = G_OBJECT_CLASS (gtk_layout_parent_class)->constructor (type,
 825                                                                   n_properties,
 826                                                                   properties);
 827
 828   layout = GTK_LAYOUT (object);
 829
 830   hadj = layout->hadjustment ? layout->hadjustment : new_default_adjustment ();
 831   vadj = layout->vadjustment ? layout->vadjustment : new_default_adjustment ();
 832
 833   if (!layout->hadjustment || !layout->vadjustment)
 834     gtk_layout_set_adjustments (layout, hadj, vadj);
 835
 836   return object;
 837 }
 838
 839 /* Widget methods
 840  */
 841
 842 static void
 843 gtk_layout_realize (GtkWidget *widget)
 844 {
 845   GtkLayout *layout = GTK_LAYOUT (widget);
 846   GList *tmp_list;
 847   GdkWindowAttr attributes;
 848   gint attributes_mask;
 849
 850   GTK_WIDGET_SET_FLAGS (layout, GTK_REALIZED);
 851
 852   attributes.window_type = GDK_WINDOW_CHILD;
 853   attributes.x = widget->allocation.x;
 854   attributes.y = widget->allocation.y;
 855   attributes.width = widget->allocation.width;
 856   attributes.height = widget->allocation.height;
 857   attributes.wclass = GDK_INPUT_OUTPUT;
 858   attributes.visual = gtk_widget_get_visual (widget);
 859   attributes.colormap = gtk_widget_get_colormap (widget);
 860   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
 861
 862   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
 863
 864   widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
 865                                    &attributes, attributes_mask);
 866   gdk_window_set_back_pixmap (widget->window, NULL, FALSE);
 867   gdk_window_set_user_data (widget->window, widget);
 868
 869   attributes.x = - layout->hadjustment->value,
 870   attributes.y = - layout->vadjustment->value;
 871   attributes.width = MAX (layout->width, widget->allocation.width);
 872   attributes.height = MAX (layout->height, widget->allocation.height);
 873   attributes.event_mask = GDK_EXPOSURE_MASK | GDK_SCROLL_MASK |
 874                           gtk_widget_get_events (widget);
 875
 876   layout->bin_window = gdk_window_new (widget->window,
 877                                         &attributes, attributes_mask);
 878   gdk_window_set_user_data (layout->bin_window, widget);
 879
 880   widget->style = gtk_style_attach (widget->style, widget->window);
 881   gtk_style_set_background (widget->style, layout->bin_window, GTK_STATE_NORMAL);
 882
 883   tmp_list = layout->children;
 884   while (tmp_list)
 885     {
 886       GtkLayoutChild *child = tmp_list->data;
 887       tmp_list = tmp_list->next;
 888
 889       gtk_widget_set_parent_window (child->widget, layout->bin_window);
 890     }
 891 }
 892
 893 static void
 894 gtk_layout_style_set (GtkWidget *widget,
 895                       GtkStyle  *old_style)
 896 {
 897   GTK_WIDGET_CLASS (gtk_layout_parent_class)->style_set (widget, old_style);
 898
 899   if (GTK_WIDGET_REALIZED (widget))
 900     {
 901       gtk_style_set_background (widget->style, GTK_LAYOUT (widget)->bin_window, GTK_STATE_NORMAL);
 902     }
 903 }
 904
 905 static void
 906 gtk_layout_map (GtkWidget *widget)
 907 {
 908   GtkLayout *layout = GTK_LAYOUT (widget);
 909   GList *tmp_list;
 910
 911   GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
 912
 913   tmp_list = layout->children;
 914   while (tmp_list)
 915     {
 916       GtkLayoutChild *child = tmp_list->data;
 917       tmp_list = tmp_list->next;
 918
 919       if (gtk_widget_get_visible (child->widget))
 920         {
 921           if (!GTK_WIDGET_MAPPED (child->widget))
 922             gtk_widget_map (child->widget);
 923         }
 924     }
 925
 926   gdk_window_show (layout->bin_window);
 927   gdk_window_show (widget->window);
 928 }
 929
 930 static void
 931 gtk_layout_unrealize (GtkWidget *widget)
 932 {
 933   GtkLayout *layout = GTK_LAYOUT (widget);
 934
 935   gdk_window_set_user_data (layout->bin_window, NULL);
 936   gdk_window_destroy (layout->bin_window);
 937   layout->bin_window = NULL;
 938
 939   GTK_WIDGET_CLASS (gtk_layout_parent_class)->unrealize (widget);
 940 }
 941
 942 static void
 943 gtk_layout_size_request (GtkWidget     *widget,
 944                          GtkRequisition *requisition)
 945 {
 946   GtkLayout *layout = GTK_LAYOUT (widget);
 947   GList *tmp_list;
 948
 949   requisition->width = 0;
 950   requisition->height = 0;
 951
 952   tmp_list = layout->children;
 953
 954   while (tmp_list)
 955     {
 956       GtkLayoutChild *child = tmp_list->data;
 957       GtkRequisition child_requisition;
 958
 959       tmp_list = tmp_list->next;
 960
 961       gtk_widget_size_request (child->widget, &child_requisition);
 962     }
 963 }
 964
 965 static void
 966 gtk_layout_size_allocate (GtkWidget     *widget,
 967                           GtkAllocation *allocation)
 968 {
 969   GtkLayout *layout = GTK_LAYOUT (widget);
 970   GList *tmp_list;
 971
 972   widget->allocation = *allocation;
 973
 974   tmp_list = layout->children;
 975
 976   while (tmp_list)
 977     {
 978       GtkLayoutChild *child = tmp_list->data;
 979       tmp_list = tmp_list->next;
 980
 981       gtk_layout_allocate_child (layout, child);
 982     }
 983
 984   if (GTK_WIDGET_REALIZED (widget))
 985     {
 986       gdk_window_move_resize (widget->window,
 987                               allocation->x, allocation->y,
 988                               allocation->width, allocation->height);
 989
 990       gdk_window_resize (layout->bin_window,
 991                          MAX (layout->width, allocation->width),
 992                          MAX (layout->height, allocation->height));
 993     }
 994
 995   layout->hadjustment->page_size = allocation->width;
 996   layout->hadjustment->page_increment = allocation->width * 0.9;
 997   layout->hadjustment->lower = 0;
 998   /* set_adjustment_upper() emits ::changed */
 999   gtk_layout_set_adjustment_upper (layout->hadjustment, MAX (allocation->width, layout->width), TRUE);
1000
1001   layout->vadjustment->page_size = allocation->height;
1002   layout->vadjustment->page_increment = allocation->height * 0.9;
1003   layout->vadjustment->lower = 0;
1004   layout->vadjustment->upper = MAX (allocation->height, layout->height);
1005   gtk_layout_set_adjustment_upper (layout->vadjustment, MAX (allocation->height, layout->height), TRUE);
1006 }
1007
1008 static gint
1009 gtk_layout_expose (GtkWidget      *widget,
1010                    GdkEventExpose *event)
1011 {
1012   GtkLayout *layout = GTK_LAYOUT (widget);
1013
1014   if (event->window != layout->bin_window)
1015     return FALSE;
1016
1017   GTK_WIDGET_CLASS (gtk_layout_parent_class)->expose_event (widget, event);
1018
1019   return FALSE;
1020 }
1021
1022 /* Container methods
1023  */
1024 static void
1025 gtk_layout_add (GtkContainer *container,
1026                 GtkWidget    *widget)
1027 {
1028   gtk_layout_put (GTK_LAYOUT (container), widget, 0, 0);
1029 }
1030
1031 static void
1032 gtk_layout_remove (GtkContainer *container,
1033                    GtkWidget    *widget)
1034 {
1035   GtkLayout *layout = GTK_LAYOUT (container);
1036   GList *tmp_list;
1037   GtkLayoutChild *child = NULL;
1038
1039   tmp_list = layout->children;
1040   while (tmp_list)
1041     {
1042       child = tmp_list->data;
1043       if (child->widget == widget)
1044         break;
1045       tmp_list = tmp_list->next;
1046     }
1047
1048   if (tmp_list)
1049     {
1050       gtk_widget_unparent (widget);
1051
1052       layout->children = g_list_remove_link (layout->children, tmp_list);
1053       g_list_free_1 (tmp_list);
1054       g_free (child);
1055     }
1056 }
1057
1058 static void
1059 gtk_layout_forall (GtkContainer *container,
1060                    gboolean      include_internals,
1061                    GtkCallback   callback,
1062                    gpointer      callback_data)
1063 {
1064   GtkLayout *layout = GTK_LAYOUT (container);
1065   GtkLayoutChild *child;
1066   GList *tmp_list;
1067
1068   tmp_list = layout->children;
1069   while (tmp_list)
1070     {
1071       child = tmp_list->data;
1072       tmp_list = tmp_list->next;
1073
1074       (* callback) (child->widget, callback_data);
1075     }
1076 }
1077
1078 /* Operations on children
1079  */
1080
1081 static void
1082 gtk_layout_allocate_child (GtkLayout      *layout,
1083                            GtkLayoutChild *child)
1084 {
1085   GtkAllocation allocation;
1086   GtkRequisition requisition;
1087
1088   allocation.x = child->x;
1089   allocation.y = child->y;
1090   gtk_widget_get_child_requisition (child->widget, &requisition);
1091   allocation.width = requisition.width;
1092   allocation.height = requisition.height;
1093
1094   gtk_widget_size_allocate (child->widget, &allocation);
1095 }
1096
1097 /* Callbacks */
1098
1099 static void
1100 gtk_layout_adjustment_changed (GtkAdjustment *adjustment,
1101                                GtkLayout     *layout)
1102 {
1103   if (layout->freeze_count)
1104     return;
1105
1106   if (GTK_WIDGET_REALIZED (layout))
1107     {
1108       gdk_window_move (layout->bin_window,
1109                        - layout->hadjustment->value,
1110                        - layout->vadjustment->value);
1111
1112       gdk_window_process_updates (layout->bin_window, TRUE);
1113     }
1114 }
1115
1116 #define __GTK_LAYOUT_C__
1117 #include "gtkaliasdef.c"