[gedit] Get the prefered size for the widget.

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 2cd4c274f8dccf6ec95d0145b15ffd2bca7fa644
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Sun Jan 23 14:19:31 2011 +0100

    Get the prefered size for the widget.
    
    This avoid a heavy slow down when we needed to scroll the widget.
    Solution pointed by Paolo Borelli.

 gedit/gedit-overlay.c |   58 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 57 insertions(+), 1 deletions(-)
---
diff --git a/gedit/gedit-overlay.c b/gedit/gedit-overlay.c
index d1b188c..1431b7f 100644
--- a/gedit/gedit-overlay.c
+++ b/gedit/gedit-overlay.c
@@ -287,11 +287,65 @@ gedit_overlay_realize (GtkWidget *widget)
 	gdk_window_set_user_data (window, widget);
 
 	context = gtk_widget_get_style_context (widget);
-	gtk_style_context_set_state (context, 0);
+	gtk_style_context_set_state (context, GTK_STATE_FLAG_NORMAL);
 	gtk_style_context_set_background (context, window);
 }
 
 static void
+gedit_overlay_get_preferred_width (GtkWidget *widget,
+                                   gint      *minimum,
+                                   gint      *natural)
+{
+	GeditOverlayPrivate *priv = GEDIT_OVERLAY (widget)->priv;
+	OverlayChild *child;
+	GSList *children;
+	gint child_min, child_nat;
+
+	*minimum = 0;
+	*natural = 0;
+
+	for (children = priv->children; children; children = children->next)
+	{
+		child = children->data;
+
+		if (!gtk_widget_get_visible (child->child))
+			continue;
+
+		gtk_widget_get_preferred_width (child->child, &child_min, &child_nat);
+
+		*minimum = MAX (*minimum, child_min);
+		*natural = MAX (*natural, child_nat);
+	}
+}
+
+static void
+gedit_overlay_get_preferred_height (GtkWidget *widget,
+                                    gint      *minimum,
+                                    gint      *natural)
+{
+	GeditOverlayPrivate *priv = GEDIT_OVERLAY (widget)->priv;
+	OverlayChild *child;
+	GSList *children;
+	gint child_min, child_nat;
+
+	*minimum = 0;
+	*natural = 0;
+
+	for (children = priv->children; children; children = children->next)
+	{
+		child = children->data;
+
+		if (!gtk_widget_get_visible (child->child))
+			continue;
+
+		gtk_widget_get_preferred_height (child->child, &child_min, &child_nat);
+
+		*minimum = MAX (*minimum, child_min);
+		*natural = MAX (*natural, child_nat);
+	}
+}
+
+static void
 set_children_positions (GeditOverlay *overlay)
 {
 	GSList *l;
@@ -510,6 +564,8 @@ gedit_overlay_class_init (GeditOverlayClass *klass)
 	object_class->set_property = gedit_overlay_set_property;
 
 	widget_class->realize = gedit_overlay_realize;
+	widget_class->get_preferred_width = gedit_overlay_get_preferred_width;
+	widget_class->get_preferred_height = gedit_overlay_get_preferred_height;
 	widget_class->size_allocate = gedit_overlay_size_allocate;
 
 	container_class->add = gedit_overlay_add;