]> Pileus Git - ~andy/gtk/blobdiff - gtk/gtklayout.c
stylecontext: Do invalidation on first resize container
[~andy/gtk] / gtk / gtklayout.c
index 46772136e3508835c33d15fa1b12ffd697a32498..73cdb62f2ac50fceb0166ec8a7389c904a01cb83 100644 (file)
@@ -12,9 +12,7 @@
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
  *
  * GtkLayout: Widget for scrolling of arbitrary-sized areas.
  *
  * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 
  */
 
-#include "gdkconfig.h"
+#include "config.h"
 
 #include "gtklayout.h"
-#include "gtksignal.h"
-#include "gtkprivate.h"
+
+#include "gdk/gdk.h"
+
+#include "gtkadjustment.h"
 #include "gtkintl.h"
+#include "gtkmarshalers.h"
+#include "gtkprivate.h"
+#include "gtkscrollable.h"
+
+
+/**
+ * SECTION:gtklayout
+ * @Short_description: Infinite scrollable area containing child widgets
+ *   and/or custom drawing
+ * @Title: GtkLayout
+ * @See_also: #GtkDrawingArea, #GtkScrolledWindow
+ *
+ * #GtkLayout is similar to #GtkDrawingArea in that it's a "blank slate"
+ * and doesn't do anything but paint a blank background by default. It's
+ * different in that it supports scrolling natively (you can add it to a
+ * #GtkScrolledWindow), and it can contain child widgets, since it's a
+ * #GtkContainer. However if you're just going to draw, a #GtkDrawingArea
+ * is a better choice since it has lower overhead.
+ *
+ * When handling expose events on a #GtkLayout, you must draw to
+ * GTK_LAYOUT (layout)->bin_window, rather than to
+ * GTK_WIDGET (layout)->window, as you would for a drawing
+ * area.
+ */
+
 
 typedef struct _GtkLayoutChild   GtkLayoutChild;
 
+struct _GtkLayoutPrivate
+{
+  /* Properties */
+  guint width;
+  guint height;
+
+  GtkAdjustment *hadjustment;
+  GtkAdjustment *vadjustment;
+
+  /* GtkScrollablePolicy needs to be checked when
+   * driving the scrollable adjustment values */
+  guint hscroll_policy : 1;
+  guint vscroll_policy : 1;
+
+  /* Properties */
+
+  GdkVisibilityState visibility;
+  GdkWindow *bin_window;
+
+  GList *children;
+
+  gint scroll_x;
+  gint scroll_y;
+
+  guint freeze_count;
+};
+
 struct _GtkLayoutChild {
   GtkWidget *widget;
   gint x;
@@ -47,53 +99,83 @@ enum {
    PROP_0,
    PROP_HADJUSTMENT,
    PROP_VADJUSTMENT,
+   PROP_HSCROLL_POLICY,
+   PROP_VSCROLL_POLICY,
    PROP_WIDTH,
    PROP_HEIGHT
 };
 
-static void     gtk_layout_class_init         (GtkLayoutClass *class);
-static void     gtk_layout_get_property       (GObject        *object,
-                                              guint          prop_id,
-                                              GValue         *value,
-                                              GParamSpec     *pspec);
-static void     gtk_layout_set_property       (GObject        *object,
-                                              guint          prop_id,
-                                              const GValue   *value,
-                                              GParamSpec     *pspec);
-static void     gtk_layout_init               (GtkLayout      *layout);
-
-static void     gtk_layout_finalize           (GObject        *object);
-static void     gtk_layout_realize            (GtkWidget      *widget);
-static void     gtk_layout_unrealize          (GtkWidget      *widget);
-static void     gtk_layout_map                (GtkWidget      *widget);
-static void     gtk_layout_size_request       (GtkWidget      *widget,
-                                              GtkRequisition *requisition);
-static void     gtk_layout_size_allocate      (GtkWidget      *widget,
-                                              GtkAllocation  *allocation);
-static gint     gtk_layout_expose             (GtkWidget      *widget, 
-                                              GdkEventExpose *event);
-
-static void     gtk_layout_remove             (GtkContainer *container, 
-                                              GtkWidget    *widget);
-static void     gtk_layout_forall             (GtkContainer *container,
-                                              gboolean      include_internals,
-                                              GtkCallback   callback,
-                                              gpointer      callback_data);
-static void     gtk_layout_set_adjustments    (GtkLayout     *layout,
-                                              GtkAdjustment *hadj,
-                                              GtkAdjustment *vadj);
-
-static void     gtk_layout_allocate_child     (GtkLayout      *layout,
-                                              GtkLayoutChild *child);
-
-
-static void     gtk_layout_adjustment_changed (GtkAdjustment  *adjustment,
-                                              GtkLayout      *layout);
-
-static GtkWidgetClass *parent_class = NULL;
+enum {
+  CHILD_PROP_0,
+  CHILD_PROP_X,
+  CHILD_PROP_Y
+};
+
+static void gtk_layout_get_property       (GObject        *object,
+                                           guint           prop_id,
+                                           GValue         *value,
+                                           GParamSpec     *pspec);
+static void gtk_layout_set_property       (GObject        *object,
+                                           guint           prop_id,
+                                           const GValue   *value,
+                                           GParamSpec     *pspec);
+static void gtk_layout_finalize           (GObject        *object);
+static void gtk_layout_realize            (GtkWidget      *widget);
+static void gtk_layout_unrealize          (GtkWidget      *widget);
+static void gtk_layout_map                (GtkWidget      *widget);
+static void gtk_layout_get_preferred_width  (GtkWidget     *widget,
+                                             gint          *minimum,
+                                             gint          *natural);
+static void gtk_layout_get_preferred_height (GtkWidget     *widget,
+                                             gint          *minimum,
+                                             gint          *natural);
+static void gtk_layout_size_allocate      (GtkWidget      *widget,
+                                           GtkAllocation  *allocation);
+static gint gtk_layout_draw               (GtkWidget      *widget,
+                                           cairo_t        *cr);
+static void gtk_layout_add                (GtkContainer   *container,
+                                          GtkWidget      *widget);
+static void gtk_layout_remove             (GtkContainer   *container,
+                                           GtkWidget      *widget);
+static void gtk_layout_forall             (GtkContainer   *container,
+                                           gboolean        include_internals,
+                                           GtkCallback     callback,
+                                           gpointer        callback_data);
+static void gtk_layout_set_child_property (GtkContainer   *container,
+                                           GtkWidget      *child,
+                                           guint           property_id,
+                                           const GValue   *value,
+                                           GParamSpec     *pspec);
+static void gtk_layout_get_child_property (GtkContainer   *container,
+                                           GtkWidget      *child,
+                                           guint           property_id,
+                                           GValue         *value,
+                                           GParamSpec     *pspec);
+static void gtk_layout_allocate_child     (GtkLayout      *layout,
+                                           GtkLayoutChild *child);
+static void gtk_layout_adjustment_changed (GtkAdjustment  *adjustment,
+                                           GtkLayout      *layout);
+static void gtk_layout_style_updated      (GtkWidget      *widget);
+
+static void gtk_layout_set_hadjustment_values (GtkLayout      *layout);
+static void gtk_layout_set_vadjustment_values (GtkLayout      *layout);
+
+G_DEFINE_TYPE_WITH_CODE (GtkLayout, gtk_layout, GTK_TYPE_CONTAINER,
+                        G_IMPLEMENT_INTERFACE (GTK_TYPE_SCROLLABLE, NULL))
 
 /* Public interface
  */
+/**
+ * gtk_layout_new:
+ * @hadjustment: (allow-none): horizontal scroll adjustment, or %NULL
+ * @vadjustment: (allow-none): vertical scroll adjustment, or %NULL
+ * 
+ * Creates a new #GtkLayout. Unless you have a specific adjustment
+ * you'd like the layout to use for scrolling, pass %NULL for
+ * @hadjustment and @vadjustment.
+ * 
+ * Return value: a new #GtkLayout
+ **/
   
 GtkWidget*    
 gtk_layout_new (GtkAdjustment *hadjustment,
@@ -101,254 +183,421 @@ gtk_layout_new (GtkAdjustment *hadjustment,
 {
   GtkLayout *layout;
 
-  layout = gtk_type_new (GTK_TYPE_LAYOUT);
-
-  gtk_layout_set_adjustments (layout, hadjustment, vadjustment);
+  layout = g_object_new (GTK_TYPE_LAYOUT,
+                        "hadjustment", hadjustment,
+                        "vadjustment", vadjustment,
+                        NULL);
 
   return GTK_WIDGET (layout);
 }
 
-GtkAdjustment* 
-gtk_layout_get_hadjustment (GtkLayout     *layout)
+/**
+ * gtk_layout_get_bin_window:
+ * @layout: a #GtkLayout
+ *
+ * Retrieve the bin window of the layout used for drawing operations.
+ *
+ * Return value: (transfer none): a #GdkWindow
+ *
+ * Since: 2.14
+ **/
+GdkWindow*
+gtk_layout_get_bin_window (GtkLayout *layout)
 {
-  g_return_val_if_fail (layout != NULL, NULL);
   g_return_val_if_fail (GTK_IS_LAYOUT (layout), NULL);
 
-  return layout->hadjustment;
+  return layout->priv->bin_window;
 }
-GtkAdjustment* 
-gtk_layout_get_vadjustment (GtkLayout     *layout)
+
+/**
+ * gtk_layout_get_hadjustment:
+ * @layout: a #GtkLayout
+ *
+ * This function should only be called after the layout has been
+ * placed in a #GtkScrolledWindow or otherwise configured for
+ * scrolling. It returns the #GtkAdjustment used for communication
+ * between the horizontal scrollbar and @layout.
+ *
+ * See #GtkScrolledWindow, #GtkScrollbar, #GtkAdjustment for details.
+ *
+ * Return value: (transfer none): horizontal scroll adjustment
+ *
+ * Deprecated: 3.0: Use gtk_scrollable_get_hadjustment()
+ **/
+GtkAdjustment*
+gtk_layout_get_hadjustment (GtkLayout *layout)
 {
-  g_return_val_if_fail (layout != NULL, NULL);
   g_return_val_if_fail (GTK_IS_LAYOUT (layout), NULL);
 
-  return layout->vadjustment;
+  return layout->priv->hadjustment;
 }
-
-static void           
-gtk_layout_set_adjustments (GtkLayout     *layout,
-                           GtkAdjustment *hadj,
-                           GtkAdjustment *vadj)
+/**
+ * gtk_layout_get_vadjustment:
+ * @layout: a #GtkLayout
+ *
+ * This function should only be called after the layout has been
+ * placed in a #GtkScrolledWindow or otherwise configured for
+ * scrolling. It returns the #GtkAdjustment used for communication
+ * between the vertical scrollbar and @layout.
+ *
+ * See #GtkScrolledWindow, #GtkScrollbar, #GtkAdjustment for details.
+ *
+ * Return value: (transfer none): vertical scroll adjustment
+ *
+ * Deprecated: 3.0: Use gtk_scrollable_get_vadjustment()
+ **/
+GtkAdjustment*
+gtk_layout_get_vadjustment (GtkLayout *layout)
 {
-  gboolean need_adjust = FALSE;
+  g_return_val_if_fail (GTK_IS_LAYOUT (layout), NULL);
 
-  g_return_if_fail (layout != NULL);
-  g_return_if_fail (GTK_IS_LAYOUT (layout));
+  return layout->priv->vadjustment;
+}
 
-  if (hadj)
-    g_return_if_fail (GTK_IS_ADJUSTMENT (hadj));
-  else
-    hadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
-  if (vadj)
-    g_return_if_fail (GTK_IS_ADJUSTMENT (vadj));
-  else
-    vadj = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
-  
-  if (layout->hadjustment && (layout->hadjustment != hadj))
-    {
-      gtk_signal_disconnect_by_data (GTK_OBJECT (layout->hadjustment), layout);
-      gtk_object_unref (GTK_OBJECT (layout->hadjustment));
-    }
-  
-  if (layout->vadjustment && (layout->vadjustment != vadj))
-    {
-      gtk_signal_disconnect_by_data (GTK_OBJECT (layout->vadjustment), layout);
-      gtk_object_unref (GTK_OBJECT (layout->vadjustment));
-    }
-  
-  if (layout->hadjustment != hadj)
-    {
-      layout->hadjustment = hadj;
-      gtk_object_ref (GTK_OBJECT (layout->hadjustment));
-      gtk_object_sink (GTK_OBJECT (layout->hadjustment));
-      
-      gtk_signal_connect (GTK_OBJECT (layout->hadjustment), "value_changed",
-                         (GtkSignalFunc) gtk_layout_adjustment_changed,
-                         layout);
-      need_adjust = TRUE;
-    }
-  
-  if (layout->vadjustment != vadj)
-    {
-      layout->vadjustment = vadj;
-      gtk_object_ref (GTK_OBJECT (layout->vadjustment));
-      gtk_object_sink (GTK_OBJECT (layout->vadjustment));
-      
-      gtk_signal_connect (GTK_OBJECT (layout->vadjustment), "value_changed",
-                         (GtkSignalFunc) gtk_layout_adjustment_changed,
-                         layout);
-      need_adjust = TRUE;
-    }
+static void
+gtk_layout_set_hadjustment_values (GtkLayout *layout)
+{
+  GtkLayoutPrivate *priv = layout->priv;
+  GtkAllocation  allocation;
+  GtkAdjustment *adj = priv->hadjustment;
+  gdouble old_value;
+  gdouble new_value;
+  gdouble new_upper;
+
+  gtk_widget_get_allocation (GTK_WIDGET (layout), &allocation);
+
+  old_value = gtk_adjustment_get_value (adj);
+  new_upper = MAX (allocation.width, priv->width);
+
+  g_object_set (adj,
+                "lower", 0.0,
+                "upper", new_upper,
+                "page-size", (gdouble)allocation.width,
+                "step-increment", allocation.width * 0.1,
+                "page-increment", allocation.width * 0.9,
+                NULL);
+
+  new_value = CLAMP (old_value, 0, new_upper - allocation.width);
+  if (new_value != old_value)
+    gtk_adjustment_set_value (adj, new_value);
+}
 
-  if (need_adjust)
-    gtk_layout_adjustment_changed (NULL, layout);
+static void
+gtk_layout_set_vadjustment_values (GtkLayout *layout)
+{
+  GtkAllocation  allocation;
+  GtkAdjustment *adj = layout->priv->vadjustment;
+  gdouble old_value;
+  gdouble new_value;
+  gdouble new_upper;
+
+  gtk_widget_get_allocation (GTK_WIDGET (layout), &allocation);
+
+  old_value = gtk_adjustment_get_value (adj);
+  new_upper = MAX (allocation.height, layout->priv->height);
+
+  g_object_set (adj,
+                "lower", 0.0,
+                "upper", new_upper,
+                "page-size", (gdouble)allocation.height,
+                "step-increment", allocation.height * 0.1,
+                "page-increment", allocation.height * 0.9,
+                NULL);
+
+  new_value = CLAMP (old_value, 0, new_upper - allocation.height);
+  if (new_value != old_value)
+    gtk_adjustment_set_value (adj, new_value);
 }
 
 static void
 gtk_layout_finalize (GObject *object)
 {
   GtkLayout *layout = GTK_LAYOUT (object);
+  GtkLayoutPrivate *priv = layout->priv;
 
-  gtk_object_unref (GTK_OBJECT (layout->hadjustment));
-  gtk_object_unref (GTK_OBJECT (layout->vadjustment));
+  g_object_unref (priv->hadjustment);
+  g_object_unref (priv->vadjustment);
 
-  G_OBJECT_CLASS (parent_class)->finalize (object);
+  G_OBJECT_CLASS (gtk_layout_parent_class)->finalize (object);
 }
 
-void           
+static void
+gtk_layout_do_set_hadjustment (GtkLayout     *layout,
+                               GtkAdjustment *adjustment)
+{
+  GtkLayoutPrivate *priv;
+
+  priv = layout->priv;
+
+  if (adjustment && priv->hadjustment == adjustment)
+        return;
+
+  if (priv->hadjustment != NULL)
+    {
+      g_signal_handlers_disconnect_by_func (priv->hadjustment,
+                                            gtk_layout_adjustment_changed,
+                                            layout);
+      g_object_unref (priv->hadjustment);
+    }
+
+  if (adjustment == NULL)
+    adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
+
+  g_signal_connect (adjustment, "value-changed",
+                    G_CALLBACK (gtk_layout_adjustment_changed), layout);
+  priv->hadjustment = g_object_ref_sink (adjustment);
+  gtk_layout_set_hadjustment_values (layout);
+
+  g_object_notify (G_OBJECT (layout), "hadjustment");
+}
+
+/**
+ * gtk_layout_set_hadjustment:
+ * @layout: a #GtkLayout
+ * @adjustment: (allow-none): new scroll adjustment
+ *
+ * Sets the horizontal scroll adjustment for the layout.
+ *
+ * See #GtkScrolledWindow, #GtkScrollbar, #GtkAdjustment for details.
+ *
+ * Deprecated: 3.0: Use gtk_scrollable_set_hadjustment()
+ **/
+void
 gtk_layout_set_hadjustment (GtkLayout     *layout,
-                           GtkAdjustment *adjustment)
+                            GtkAdjustment *adjustment)
 {
-  g_return_if_fail (layout != NULL);
   g_return_if_fail (GTK_IS_LAYOUT (layout));
+  g_return_if_fail (adjustment == NULL || GTK_IS_ADJUSTMENT (adjustment));
 
-  gtk_layout_set_adjustments (layout, adjustment, layout->vadjustment);
-  g_object_notify (G_OBJECT (layout), "hadjustment");
+  gtk_layout_do_set_hadjustment (layout, adjustment);
 }
 
-void           
+static void
+gtk_layout_do_set_vadjustment (GtkLayout     *layout,
+                               GtkAdjustment *adjustment)
+{
+  GtkLayoutPrivate *priv;
+
+  priv = layout->priv;
+
+  if (adjustment && priv->vadjustment == adjustment)
+        return;
+
+  if (priv->vadjustment != NULL)
+    {
+      g_signal_handlers_disconnect_by_func (priv->vadjustment,
+                                            gtk_layout_adjustment_changed,
+                                            layout);
+      g_object_unref (priv->vadjustment);
+    }
+
+  if (adjustment == NULL)
+    adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
+
+  g_signal_connect (adjustment, "value-changed",
+                    G_CALLBACK (gtk_layout_adjustment_changed), layout);
+  priv->vadjustment = g_object_ref_sink (adjustment);
+  gtk_layout_set_vadjustment_values (layout);
+
+  g_object_notify (G_OBJECT (layout), "vadjustment");
+}
+
+/**
+ * gtk_layout_set_vadjustment:
+ * @layout: a #GtkLayout
+ * @adjustment: (allow-none): new scroll adjustment
+ *
+ * Sets the vertical scroll adjustment for the layout.
+ *
+ * See #GtkScrolledWindow, #GtkScrollbar, #GtkAdjustment for details.
+ *
+ * Deprecated: 3.0: Use gtk_scrollable_set_vadjustment()
+ **/
+void
 gtk_layout_set_vadjustment (GtkLayout     *layout,
-                           GtkAdjustment *adjustment)
+                            GtkAdjustment *adjustment)
 {
-  g_return_if_fail (layout != NULL);
   g_return_if_fail (GTK_IS_LAYOUT (layout));
-  
-  gtk_layout_set_adjustments (layout, layout->hadjustment, adjustment);
-  g_object_notify (G_OBJECT (layout), "vadjustment");
+  g_return_if_fail (adjustment == NULL || GTK_IS_ADJUSTMENT (adjustment));
+
+  gtk_layout_do_set_vadjustment (layout, adjustment);
 }
 
+static GtkLayoutChild*
+get_child (GtkLayout  *layout,
+           GtkWidget  *widget)
+{
+  GtkLayoutPrivate *priv = layout->priv;
+  GList *children;
+
+  children = priv->children;
+  while (children)
+    {
+      GtkLayoutChild *child;
+      
+      child = children->data;
+      children = children->next;
+
+      if (child->widget == widget)
+        return child;
+    }
+
+  return NULL;
+}
 
+/**
+ * gtk_layout_put:
+ * @layout: a #GtkLayout
+ * @child_widget: child widget
+ * @x: X position of child widget
+ * @y: Y position of child widget
+ *
+ * Adds @child_widget to @layout, at position (@x,@y).
+ * @layout becomes the new parent container of @child_widget.
+ * 
+ **/
 void           
 gtk_layout_put (GtkLayout     *layout, 
                GtkWidget     *child_widget, 
                gint           x, 
                gint           y)
 {
+  GtkLayoutPrivate *priv;
   GtkLayoutChild *child;
 
-  g_return_if_fail (layout != NULL);
   g_return_if_fail (GTK_IS_LAYOUT (layout));
-  g_return_if_fail (child_widget != NULL);
   g_return_if_fail (GTK_IS_WIDGET (child_widget));
-  
+
+  priv = layout->priv;
+
   child = g_new (GtkLayoutChild, 1);
 
   child->widget = child_widget;
   child->x = x;
   child->y = y;
 
-  layout->children = g_list_append (layout->children, child);
-  
+  priv->children = g_list_append (priv->children, child);
+
+  if (gtk_widget_get_realized (GTK_WIDGET (layout)))
+    gtk_widget_set_parent_window (child->widget, priv->bin_window);
+
   gtk_widget_set_parent (child_widget, GTK_WIDGET (layout));
-  if (GTK_WIDGET_REALIZED (layout))
-    gtk_widget_set_parent_window (child->widget, layout->bin_window);
+}
+
+static void
+gtk_layout_move_internal (GtkLayout       *layout,
+                          GtkWidget       *widget,
+                          gboolean         change_x,
+                          gint             x,
+                          gboolean         change_y,
+                          gint             y)
+{
+  GtkLayoutChild *child;
+
+  child = get_child (layout, widget);
+
+  g_assert (child);
 
-  if (GTK_WIDGET_REALIZED (layout))
-    gtk_widget_realize (child_widget);
-    
-  if (GTK_WIDGET_VISIBLE (layout) && GTK_WIDGET_VISIBLE (child_widget))
+  gtk_widget_freeze_child_notify (widget);
+  
+  if (change_x)
     {
-      if (GTK_WIDGET_MAPPED (layout))
-       gtk_widget_map (child_widget);
+      child->x = x;
+      gtk_widget_child_notify (widget, "x");
+    }
 
-      gtk_widget_queue_resize (child_widget);
+  if (change_y)
+    {
+      child->y = y;
+      gtk_widget_child_notify (widget, "y");
     }
+
+  gtk_widget_thaw_child_notify (widget);
+  
+  if (gtk_widget_get_visible (widget) &&
+      gtk_widget_get_visible (GTK_WIDGET (layout)))
+    gtk_widget_queue_resize (widget);
 }
 
+/**
+ * gtk_layout_move:
+ * @layout: a #GtkLayout
+ * @child_widget: a current child of @layout
+ * @x: X position to move to
+ * @y: Y position to move to
+ *
+ * Moves a current child of @layout to a new position.
+ * 
+ **/
 void           
 gtk_layout_move (GtkLayout     *layout, 
                 GtkWidget     *child_widget, 
                 gint           x, 
                 gint           y)
 {
-  GList *tmp_list;
-  GtkLayoutChild *child;
-  
-  g_return_if_fail (layout != NULL);
   g_return_if_fail (GTK_IS_LAYOUT (layout));
+  g_return_if_fail (GTK_IS_WIDGET (child_widget));
+  g_return_if_fail (gtk_widget_get_parent (child_widget) == GTK_WIDGET (layout));
 
-  tmp_list = layout->children;
-  while (tmp_list)
-    {
-      child = tmp_list->data;
-      tmp_list = tmp_list->next;
-
-      if (child->widget == child_widget)
-       {
-         child->x = x;
-         child->y = y;
-
-         if (GTK_WIDGET_VISIBLE (child_widget) && GTK_WIDGET_VISIBLE (layout))
-           gtk_widget_queue_resize (child_widget);
-
-         return;
-       }
-    }
-}
-
-static void
-gtk_layout_set_adjustment_upper (GtkAdjustment *adj,
-                                gdouble        upper)
-{
-  if (upper != adj->upper)
-    {
-      gdouble min = MAX (0., upper - adj->page_size);
-      gboolean value_changed = FALSE;
-      
-      adj->upper = upper;
-      
-      if (adj->value > min)
-       {
-         adj->value = min;
-         value_changed = TRUE;
-       }
-      
-      gtk_signal_emit_by_name (GTK_OBJECT (adj), "changed");
-      if (value_changed)
-       gtk_signal_emit_by_name (GTK_OBJECT (adj), "value_changed");
-    }
+  gtk_layout_move_internal (layout, child_widget, TRUE, x, TRUE, y);
 }
 
+/**
+ * gtk_layout_set_size:
+ * @layout: a #GtkLayout
+ * @width: width of entire scrollable area
+ * @height: height of entire scrollable area
+ *
+ * Sets the size of the scrollable area of the layout.
+ * 
+ **/
 void
 gtk_layout_set_size (GtkLayout     *layout, 
                     guint          width,
                     guint          height)
 {
+  GtkLayoutPrivate *priv;
   GtkWidget *widget;
-  
-  g_return_if_fail (layout != NULL);
+
   g_return_if_fail (GTK_IS_LAYOUT (layout));
 
+  priv = layout->priv;
   widget = GTK_WIDGET (layout);
-  
-  if (width != layout->width)
+
+  g_object_freeze_notify (G_OBJECT (layout));
+  if (width != priv->width)
      {
-       layout->width = width;
+       priv->width = width;
        g_object_notify (G_OBJECT (layout), "width");
      }
-  if (height != layout->height)
+  if (height != priv->height)
      {
-       layout->height = height;
+       priv->height = height;
        g_object_notify (G_OBJECT (layout), "height");
      }
+  g_object_thaw_notify (G_OBJECT (layout));
 
-  gtk_layout_set_adjustment_upper (layout->hadjustment, layout->width);
-  gtk_layout_set_adjustment_upper (layout->vadjustment, layout->height);
-
-  if (GTK_WIDGET_REALIZED (layout))
+  if (gtk_widget_get_realized (widget))
     {
-      width = MAX (width, widget->allocation.width);
-      height = MAX (height, widget->allocation.height);
-      gdk_window_resize (layout->bin_window, width, height);
+      GtkAllocation allocation;
+
+      gtk_widget_get_allocation (widget, &allocation);
+      width = MAX (width, allocation.width);
+      height = MAX (height, allocation.height);
+      gdk_window_resize (priv->bin_window, width, height);
     }
+
+  gtk_layout_set_hadjustment_values (layout);
+  gtk_layout_set_vadjustment_values (layout);
 }
 
 /**
  * gtk_layout_get_size:
  * @layout: a #GtkLayout
- * @width: location to store the width set on @layout, or %NULL
- * @height: location to store the height set on @layout, or %NULL
+ * @width: (out) (allow-none): location to store the width set on
+ *     @layout, or %NULL
+ * @height: (out) (allow-none): location to store the height set on
+ *     @layout, or %NULL
  *
  * Gets the size that has been set on the layout, and that determines
  * the total extents of the layout's scrollbar area. See
@@ -359,134 +608,96 @@ gtk_layout_get_size (GtkLayout *layout,
                     guint     *width,
                     guint     *height)
 {
-  g_return_if_fail (GTK_IS_LAYOUT (layout));
-
-  if (width)
-    *width = layout->width;
-  if (height)
-    *height = layout->height;
-}
+  GtkLayoutPrivate *priv;
 
-void
-gtk_layout_freeze (GtkLayout *layout)
-{
-  g_return_if_fail (layout != NULL);
   g_return_if_fail (GTK_IS_LAYOUT (layout));
 
-  layout->freeze_count++;
-}
-
-void
-gtk_layout_thaw (GtkLayout *layout)
-{
-  g_return_if_fail (layout != NULL);
-  g_return_if_fail (GTK_IS_LAYOUT (layout));
+  priv = layout->priv;
 
-  if (layout->freeze_count)
-    if (!(--layout->freeze_count))
-      gtk_widget_draw (GTK_WIDGET (layout), NULL);
+  if (width)
+    *width = priv->width;
+  if (height)
+    *height = priv->height;
 }
 
 /* Basic Object handling procedures
  */
-GtkType
-gtk_layout_get_type (void)
-{
-  static GtkType layout_type = 0;
-
-  if (!layout_type)
-    {
-      static const GTypeInfo layout_info =
-      {
-       sizeof (GtkLayoutClass),
-       NULL,           /* base_init */
-       NULL,           /* base_finalize */
-       (GClassInitFunc) gtk_layout_class_init,
-       NULL,           /* class_finalize */
-       NULL,           /* class_data */
-       sizeof (GtkLayout),
-       16,             /* n_preallocs */
-       (GInstanceInitFunc) gtk_layout_init,
-      };
-
-      layout_type = g_type_register_static (GTK_TYPE_CONTAINER, "GtkLayout", &layout_info, 0);
-    }
-
-  return layout_type;
-}
-
 static void
 gtk_layout_class_init (GtkLayoutClass *class)
 {
   GObjectClass *gobject_class;
-  GtkObjectClass *object_class;
   GtkWidgetClass *widget_class;
   GtkContainerClass *container_class;
 
   gobject_class = (GObjectClass*) class;
-  object_class = (GtkObjectClass*) class;
   widget_class = (GtkWidgetClass*) class;
   container_class = (GtkContainerClass*) class;
 
-  parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
-
   gobject_class->set_property = gtk_layout_set_property;
   gobject_class->get_property = gtk_layout_get_property;
   gobject_class->finalize = gtk_layout_finalize;
 
-  g_object_class_install_property (gobject_class,
-                                  PROP_HADJUSTMENT,
-                                  g_param_spec_object ("hadjustment",
-                                                       _("Horizontal adjustment"),
-                                                       _("The GtkAdjustment for the horizontal position."),
-                                                       GTK_TYPE_ADJUSTMENT,
-                                                       G_PARAM_READWRITE));
+  container_class->set_child_property = gtk_layout_set_child_property;
+  container_class->get_child_property = gtk_layout_get_child_property;
+
+  gtk_container_class_install_child_property (container_class,
+                                             CHILD_PROP_X,
+                                             g_param_spec_int ("x",
+                                                                P_("X position"),
+                                                                P_("X position of child widget"),
+                                                                G_MININT,
+                                                                G_MAXINT,
+                                                                0,
+                                                                GTK_PARAM_READWRITE));
+
+  gtk_container_class_install_child_property (container_class,
+                                             CHILD_PROP_Y,
+                                             g_param_spec_int ("y",
+                                                                P_("Y position"),
+                                                                P_("Y position of child widget"),
+                                                                G_MININT,
+                                                                G_MAXINT,
+                                                                0,
+                                                                GTK_PARAM_READWRITE));
   
-  g_object_class_install_property (gobject_class,
-                                  PROP_VADJUSTMENT,
-                                  g_param_spec_object ("vadjustment",
-                                                       _("Vertical adjustment"),
-                                                       _("The GtkAdjustment for the vertical position."),
-                                                       GTK_TYPE_ADJUSTMENT,
-                                                       G_PARAM_READWRITE));
+  /* Scrollable interface */
+  g_object_class_override_property (gobject_class, PROP_HADJUSTMENT,    "hadjustment");
+  g_object_class_override_property (gobject_class, PROP_VADJUSTMENT,    "vadjustment");
+  g_object_class_override_property (gobject_class, PROP_HSCROLL_POLICY, "hscroll-policy");
+  g_object_class_override_property (gobject_class, PROP_VSCROLL_POLICY, "vscroll-policy");
 
   g_object_class_install_property (gobject_class,
                                   PROP_WIDTH,
                                   g_param_spec_uint ("width",
-                                                    _("Width"),
-                                                    _("The width of the layout."),
+                                                    P_("Width"),
+                                                    P_("The width of the layout"),
                                                     0,
                                                     G_MAXINT,
                                                     100,
-                                                    G_PARAM_READWRITE));
+                                                    GTK_PARAM_READWRITE));
   g_object_class_install_property (gobject_class,
                                   PROP_HEIGHT,
                                   g_param_spec_uint ("height",
-                                                    _("Height"),
-                                                    _("The height of the layout."),
+                                                    P_("Height"),
+                                                    P_("The height of the layout"),
                                                     0,
                                                     G_MAXINT,
                                                     100,
-                                                    G_PARAM_READWRITE));
+                                                    GTK_PARAM_READWRITE));
   widget_class->realize = gtk_layout_realize;
   widget_class->unrealize = gtk_layout_unrealize;
   widget_class->map = gtk_layout_map;
-  widget_class->size_request = gtk_layout_size_request;
+  widget_class->get_preferred_width = gtk_layout_get_preferred_width;
+  widget_class->get_preferred_height = gtk_layout_get_preferred_height;
   widget_class->size_allocate = gtk_layout_size_allocate;
-  widget_class->expose_event = gtk_layout_expose;
+  widget_class->draw = gtk_layout_draw;
+  widget_class->style_updated = gtk_layout_style_updated;
 
+  container_class->add = gtk_layout_add;
   container_class->remove = gtk_layout_remove;
   container_class->forall = gtk_layout_forall;
 
-  class->set_scroll_adjustments = gtk_layout_set_adjustments;
-
-  widget_class->set_scroll_adjustments_signal =
-    gtk_signal_new ("set_scroll_adjustments",
-                   GTK_RUN_LAST,
-                   GTK_CLASS_TYPE (object_class),
-                   GTK_SIGNAL_OFFSET (GtkLayoutClass, set_scroll_adjustments),
-                   gtk_marshal_VOID__OBJECT_OBJECT,
-                   GTK_TYPE_NONE, 2, GTK_TYPE_ADJUSTMENT, GTK_TYPE_ADJUSTMENT);
+  g_type_class_add_private (class, sizeof (GtkLayoutPrivate));
 }
 
 static void
@@ -496,20 +707,27 @@ gtk_layout_get_property (GObject     *object,
                         GParamSpec  *pspec)
 {
   GtkLayout *layout = GTK_LAYOUT (object);
-  
+  GtkLayoutPrivate *priv = layout->priv;
+
   switch (prop_id)
     {
     case PROP_HADJUSTMENT:
-      g_value_set_object (value, G_OBJECT (layout->hadjustment));
+      g_value_set_object (value, priv->hadjustment);
       break;
     case PROP_VADJUSTMENT:
-      g_value_set_object (value, G_OBJECT (layout->vadjustment));
+      g_value_set_object (value, priv->vadjustment);
+      break;
+    case PROP_HSCROLL_POLICY:
+      g_value_set_enum (value, priv->hscroll_policy);
+      break;
+    case PROP_VSCROLL_POLICY:
+      g_value_set_enum (value, priv->vscroll_policy);
       break;
     case PROP_WIDTH:
-      g_value_set_uint (value, layout->width);
+      g_value_set_uint (value, priv->width);
       break;
     case PROP_HEIGHT:
-      g_value_set_uint (value, layout->height);
+      g_value_set_uint (value, priv->height);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@@ -524,23 +742,30 @@ gtk_layout_set_property (GObject      *object,
                         GParamSpec   *pspec)
 {
   GtkLayout *layout = GTK_LAYOUT (object);
-  
+  GtkLayoutPrivate *priv = layout->priv;
+
   switch (prop_id)
     {
     case PROP_HADJUSTMENT:
-      gtk_layout_set_hadjustment (layout, 
-                                 (GtkAdjustment*) g_value_get_object (value));
+      gtk_layout_do_set_hadjustment (layout, g_value_get_object (value));
       break;
     case PROP_VADJUSTMENT:
-      gtk_layout_set_vadjustment (layout, 
-                                 (GtkAdjustment*) g_value_get_object (value));
+      gtk_layout_do_set_vadjustment (layout, g_value_get_object (value));
+      break;
+    case PROP_HSCROLL_POLICY:
+      priv->hscroll_policy = g_value_get_enum (value);
+      gtk_widget_queue_resize (GTK_WIDGET (layout));
+      break;
+    case PROP_VSCROLL_POLICY:
+      priv->vscroll_policy = g_value_get_enum (value);
+      gtk_widget_queue_resize (GTK_WIDGET (layout));
       break;
     case PROP_WIDTH:
       gtk_layout_set_size (layout, g_value_get_uint (value),
-                          layout->height);
+                          priv->height);
       break;
     case PROP_HEIGHT:
-      gtk_layout_set_size (layout, layout->width,
+      gtk_layout_set_size (layout, priv->width,
                           g_value_get_uint (value));
       break;
     default:
@@ -549,25 +774,83 @@ gtk_layout_set_property (GObject      *object,
     }
 }
 
+static void
+gtk_layout_set_child_property (GtkContainer    *container,
+                               GtkWidget       *child,
+                               guint            property_id,
+                               const GValue    *value,
+                               GParamSpec      *pspec)
+{
+  switch (property_id)
+    {
+    case CHILD_PROP_X:
+      gtk_layout_move_internal (GTK_LAYOUT (container),
+                                child,
+                                TRUE, g_value_get_int (value),
+                                FALSE, 0);
+      break;
+    case CHILD_PROP_Y:
+      gtk_layout_move_internal (GTK_LAYOUT (container),
+                                child,
+                                FALSE, 0,
+                                TRUE, g_value_get_int (value));
+      break;
+    default:
+      GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gtk_layout_get_child_property (GtkContainer *container,
+                               GtkWidget    *child,
+                               guint         property_id,
+                               GValue       *value,
+                               GParamSpec   *pspec)
+{
+  GtkLayoutChild *layout_child;
+
+  layout_child = get_child (GTK_LAYOUT (container), child);
+  
+  switch (property_id)
+    {
+    case CHILD_PROP_X:
+      g_value_set_int (value, layout_child->x);
+      break;
+    case CHILD_PROP_Y:
+      g_value_set_int (value, layout_child->y);
+      break;
+    default:
+      GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec);
+      break;
+    }
+}
 
 static void
 gtk_layout_init (GtkLayout *layout)
 {
-  layout->children = NULL;
+  GtkLayoutPrivate *priv;
+
+  layout->priv = G_TYPE_INSTANCE_GET_PRIVATE (layout,
+                                              GTK_TYPE_LAYOUT,
+                                              GtkLayoutPrivate);
+  priv = layout->priv;
+
+  priv->children = NULL;
 
-  layout->width = 100;
-  layout->height = 100;
+  priv->width = 100;
+  priv->height = 100;
 
-  layout->hadjustment = NULL;
-  layout->vadjustment = NULL;
+  priv->hadjustment = NULL;
+  priv->vadjustment = NULL;
 
-  layout->bin_window = NULL;
+  priv->bin_window = NULL;
 
-  layout->scroll_x = 0;
-  layout->scroll_y = 0;
-  layout->visibility = GDK_VISIBILITY_PARTIAL;
+  priv->scroll_x = 0;
+  priv->scroll_y = 0;
+  priv->visibility = GDK_VISIBILITY_PARTIAL;
 
-  layout->freeze_count = 0;
+  priv->freeze_count = 0;
 }
 
 /* Widget methods
@@ -576,149 +859,139 @@ gtk_layout_init (GtkLayout *layout)
 static void 
 gtk_layout_realize (GtkWidget *widget)
 {
-  GList *tmp_list;
-  GtkLayout *layout;
+  GtkLayout *layout = GTK_LAYOUT (widget);
+  GtkLayoutPrivate *priv = layout->priv;
+  GtkAllocation allocation;
+  GdkWindow *window;
   GdkWindowAttr attributes;
+  GList *tmp_list;
   gint attributes_mask;
 
-  g_return_if_fail (widget != NULL);
-  g_return_if_fail (GTK_IS_LAYOUT (widget));
+  gtk_widget_set_realized (widget, TRUE);
 
-  layout = GTK_LAYOUT (widget);
-  GTK_WIDGET_SET_FLAGS (layout, GTK_REALIZED);
+  gtk_widget_get_allocation (widget, &allocation);
 
   attributes.window_type = GDK_WINDOW_CHILD;
-  attributes.x = widget->allocation.x;
-  attributes.y = widget->allocation.y;
-  attributes.width = widget->allocation.width;
-  attributes.height = widget->allocation.height;
+  attributes.x = allocation.x;
+  attributes.y = allocation.y;
+  attributes.width = allocation.width;
+  attributes.height = allocation.height;
   attributes.wclass = GDK_INPUT_OUTPUT;
   attributes.visual = gtk_widget_get_visual (widget);
-  attributes.colormap = gtk_widget_get_colormap (widget);
   attributes.event_mask = GDK_VISIBILITY_NOTIFY_MASK;
 
-  attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
+  attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
 
-  widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
-                                  &attributes, attributes_mask);
-  gdk_window_set_user_data (widget->window, widget);
+  window = gdk_window_new (gtk_widget_get_parent_window (widget),
+                           &attributes, attributes_mask);
+  gtk_widget_set_window (widget, window);
+  gtk_widget_register_window (widget, window);
 
-  attributes.x = 0;
-  attributes.y = 0;
-  attributes.width = MAX (layout->width, widget->allocation.width);
-  attributes.height = MAX (layout->height, widget->allocation.height);
-  attributes.event_mask = GDK_EXPOSURE_MASK | GDK_SCROLL_MASK | 
-                          gtk_widget_get_events (widget);
+  gtk_widget_get_allocation (widget, &allocation);
 
-  layout->bin_window = gdk_window_new (widget->window,
-                                       &attributes, attributes_mask);
-  gdk_window_set_user_data (layout->bin_window, widget);
+  attributes.x = - gtk_adjustment_get_value (priv->hadjustment),
+  attributes.y = - gtk_adjustment_get_value (priv->vadjustment);
+  attributes.width = MAX (priv->width, allocation.width);
+  attributes.height = MAX (priv->height, allocation.height);
+  attributes.event_mask = GDK_EXPOSURE_MASK | GDK_SCROLL_MASK |
+                          GDK_SMOOTH_SCROLL_MASK | 
+                          gtk_widget_get_events (widget);
 
-  widget->style = gtk_style_attach (widget->style, widget->window);
-  gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
-  gtk_style_set_background (widget->style, layout->bin_window, GTK_STATE_NORMAL);
+  priv->bin_window = gdk_window_new (window,
+                                     &attributes, attributes_mask);
+  gtk_widget_register_window (widget, priv->bin_window);
+  gtk_style_context_set_background (gtk_widget_get_style_context (widget), priv->bin_window);
 
-  tmp_list = layout->children;
+  tmp_list = priv->children;
   while (tmp_list)
     {
       GtkLayoutChild *child = tmp_list->data;
       tmp_list = tmp_list->next;
 
-      gtk_widget_set_parent_window (child->widget, layout->bin_window);
+      gtk_widget_set_parent_window (child->widget, priv->bin_window);
     }
 }
 
-static void 
-gtk_layout_map (GtkWidget *widget)
+static void
+gtk_layout_style_updated (GtkWidget *widget)
 {
-  GList *tmp_list;
-  GtkLayout *layout;
+  GtkLayoutPrivate *priv;
 
-  g_return_if_fail (widget != NULL);
-  g_return_if_fail (GTK_IS_LAYOUT (widget));
+  GTK_WIDGET_CLASS (gtk_layout_parent_class)->style_updated (widget);
 
-  layout = GTK_LAYOUT (widget);
+  if (gtk_widget_get_realized (widget))
+    {
+      priv = GTK_LAYOUT (widget)->priv;
+      gtk_style_context_set_background (gtk_widget_get_style_context (widget), priv->bin_window);
+    }
+}
 
-  GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
+static void
+gtk_layout_map (GtkWidget *widget)
+{
+  GtkLayout *layout = GTK_LAYOUT (widget);
+  GtkLayoutPrivate *priv = layout->priv;
+  GList *tmp_list;
+
+  gtk_widget_set_mapped (widget, TRUE);
 
-  tmp_list = layout->children;
+  tmp_list = priv->children;
   while (tmp_list)
     {
       GtkLayoutChild *child = tmp_list->data;
       tmp_list = tmp_list->next;
 
-      if (GTK_WIDGET_VISIBLE (child->widget))
+      if (gtk_widget_get_visible (child->widget))
        {
-         if (!GTK_WIDGET_MAPPED (child->widget))
+         if (!gtk_widget_get_mapped (child->widget))
            gtk_widget_map (child->widget);
        }
     }
 
-  gdk_window_show (layout->bin_window);
-  gdk_window_show (widget->window);
+  gdk_window_show (priv->bin_window);
+  gdk_window_show (gtk_widget_get_window (widget));
 }
 
 static void 
 gtk_layout_unrealize (GtkWidget *widget)
 {
-  GtkLayout *layout;
-
-  g_return_if_fail (widget != NULL);
-  g_return_if_fail (GTK_IS_LAYOUT (widget));
+  GtkLayout *layout = GTK_LAYOUT (widget);
+  GtkLayoutPrivate *priv = layout->priv;
 
-  layout = GTK_LAYOUT (widget);
+  gtk_widget_unregister_window (widget, priv->bin_window);
+  gdk_window_destroy (priv->bin_window);
+  priv->bin_window = NULL;
 
-  gdk_window_set_user_data (layout->bin_window, NULL);
-  gdk_window_destroy (layout->bin_window);
-  layout->bin_window = NULL;
-
-  if (GTK_WIDGET_CLASS (parent_class)->unrealize)
-    (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
+  GTK_WIDGET_CLASS (gtk_layout_parent_class)->unrealize (widget);
 }
 
-static void     
-gtk_layout_size_request (GtkWidget     *widget,
-                        GtkRequisition *requisition)
+static void
+gtk_layout_get_preferred_width (GtkWidget *widget,
+                                gint      *minimum,
+                                gint      *natural)
 {
-  GList *tmp_list;
-  GtkLayout *layout;
-
-  g_return_if_fail (widget != NULL);
-  g_return_if_fail (GTK_IS_LAYOUT (widget));
-
-  layout = GTK_LAYOUT (widget);
-
-  requisition->width = 0;
-  requisition->height = 0;
-
-  tmp_list = layout->children;
-
-  while (tmp_list)
-    {
-      GtkLayoutChild *child = tmp_list->data;
-      GtkRequisition child_requisition;
-      
-      tmp_list = tmp_list->next;
+  *minimum = *natural = 0;
+}
 
-      gtk_widget_size_request (child->widget, &child_requisition);
-    }
+static void
+gtk_layout_get_preferred_height (GtkWidget *widget,
+                                 gint      *minimum,
+                                 gint      *natural)
+{
+  *minimum = *natural = 0;
 }
 
-static void     
+static void
 gtk_layout_size_allocate (GtkWidget     *widget,
                          GtkAllocation *allocation)
 {
+  GtkLayout *layout = GTK_LAYOUT (widget);
+  GtkLayoutPrivate *priv = layout->priv;
   GList *tmp_list;
-  GtkLayout *layout;
-
-  g_return_if_fail (widget != NULL);
-  g_return_if_fail (GTK_IS_LAYOUT (widget));
 
-  widget->allocation = *allocation;
-  
-  layout = GTK_LAYOUT (widget);
+  gtk_widget_set_allocation (widget, allocation);
 
-  tmp_list = layout->children;
+  tmp_list = priv->children;
 
   while (tmp_list)
     {
@@ -728,64 +1001,53 @@ gtk_layout_size_allocate (GtkWidget     *widget,
       gtk_layout_allocate_child (layout, child);
     }
 
-  if (GTK_WIDGET_REALIZED (widget))
+  if (gtk_widget_get_realized (widget))
     {
-      gdk_window_move_resize (widget->window,
+      gdk_window_move_resize (gtk_widget_get_window (widget),
                              allocation->x, allocation->y,
                              allocation->width, allocation->height);
 
-      gdk_window_resize (layout->bin_window,
-                        MAX (layout->width, allocation->width),
-                        MAX (layout->height, allocation->height));
+      gdk_window_resize (priv->bin_window,
+                        MAX (priv->width, allocation->width),
+                        MAX (priv->height, allocation->height));
     }
 
-  layout->hadjustment->page_size = allocation->width;
-  layout->hadjustment->page_increment = allocation->width / 2;
-  layout->hadjustment->lower = 0;
-  layout->hadjustment->upper = MAX (allocation->width, layout->width);
-  gtk_signal_emit_by_name (GTK_OBJECT (layout->hadjustment), "changed");
-
-  layout->vadjustment->page_size = allocation->height;
-  layout->vadjustment->page_increment = allocation->height / 2;
-  layout->vadjustment->lower = 0;
-  layout->vadjustment->upper = MAX (allocation->height, layout->height);
-  gtk_signal_emit_by_name (GTK_OBJECT (layout->vadjustment), "changed");
+  gtk_layout_set_hadjustment_values (layout);
+  gtk_layout_set_vadjustment_values (layout);
 }
 
-static gint 
-gtk_layout_expose (GtkWidget *widget, GdkEventExpose *event)
+static gboolean
+gtk_layout_draw (GtkWidget *widget,
+                 cairo_t   *cr)
 {
-  GtkLayout *layout;
-
-  g_return_val_if_fail (widget != NULL, FALSE);
-  g_return_val_if_fail (GTK_IS_LAYOUT (widget), FALSE);
+  GtkLayout *layout = GTK_LAYOUT (widget);
+  GtkLayoutPrivate *priv = layout->priv;
 
-  layout = GTK_LAYOUT (widget);
-
-  if (event->window != layout->bin_window)
-    return FALSE;
-  
-  (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
+  if (gtk_cairo_should_draw_window (cr, priv->bin_window))
+    GTK_WIDGET_CLASS (gtk_layout_parent_class)->draw (widget, cr);
 
   return FALSE;
 }
 
-/* Container method
+/* Container methods
  */
+static void
+gtk_layout_add (GtkContainer *container,
+               GtkWidget    *widget)
+{
+  gtk_layout_put (GTK_LAYOUT (container), widget, 0, 0);
+}
+
 static void
 gtk_layout_remove (GtkContainer *container, 
                   GtkWidget    *widget)
 {
+  GtkLayout *layout = GTK_LAYOUT (container);
+  GtkLayoutPrivate *priv = layout->priv;
   GList *tmp_list;
-  GtkLayout *layout;
   GtkLayoutChild *child = NULL;
-  
-  g_return_if_fail (container != NULL);
-  g_return_if_fail (GTK_IS_LAYOUT (container));
-  
-  layout = GTK_LAYOUT (container);
 
-  tmp_list = layout->children;
+  tmp_list = priv->children;
   while (tmp_list)
     {
       child = tmp_list->data;
@@ -798,7 +1060,7 @@ gtk_layout_remove (GtkContainer *container,
     {
       gtk_widget_unparent (widget);
 
-      layout->children = g_list_remove_link (layout->children, tmp_list);
+      priv->children = g_list_remove_link (priv->children, tmp_list);
       g_list_free_1 (tmp_list);
       g_free (child);
     }
@@ -810,17 +1072,12 @@ gtk_layout_forall (GtkContainer *container,
                   GtkCallback   callback,
                   gpointer      callback_data)
 {
-  GtkLayout *layout;
+  GtkLayout *layout = GTK_LAYOUT (container);
+  GtkLayoutPrivate *priv = layout->priv;
   GtkLayoutChild *child;
   GList *tmp_list;
 
-  g_return_if_fail (container != NULL);
-  g_return_if_fail (GTK_IS_LAYOUT (container));
-  g_return_if_fail (callback != NULL);
-
-  layout = GTK_LAYOUT (container);
-
-  tmp_list = layout->children;
+  tmp_list = priv->children;
   while (tmp_list)
     {
       child = tmp_list->data;
@@ -842,7 +1099,8 @@ gtk_layout_allocate_child (GtkLayout      *layout,
 
   allocation.x = child->x;
   allocation.y = child->y;
-  gtk_widget_get_child_requisition (child->widget, &requisition);
+
+  gtk_widget_get_preferred_size (child->widget, &requisition, NULL);
   allocation.width = requisition.width;
   allocation.height = requisition.height;
   
@@ -855,19 +1113,15 @@ static void
 gtk_layout_adjustment_changed (GtkAdjustment *adjustment,
                               GtkLayout     *layout)
 {
-  GtkWidget *widget;
-
-  widget = GTK_WIDGET (layout);
+  GtkLayoutPrivate *priv = layout->priv;
 
-  if (layout->freeze_count)
+  if (priv->freeze_count)
     return;
 
-  if (GTK_WIDGET_REALIZED (layout))
+  if (gtk_widget_get_realized (GTK_WIDGET (layout)))
     {
-      gdk_window_move (layout->bin_window,
-                      - layout->hadjustment->value,
-                      - layout->vadjustment->value);
-      
-      gdk_window_process_updates (layout->bin_window, TRUE);
+      gdk_window_move (priv->bin_window,
+                      - gtk_adjustment_get_value (priv->hadjustment),
+                      - gtk_adjustment_get_value (priv->vadjustment));
     }
 }