More GTK+ 2.0 updates.

	* docs/tutorial/gtk-tut.sgml, docs/tutorial/images/*, examples/*: More
	 GTK+ 2.0 updates.

	* docs/tutorial/Makefile.am: build and dist the new tutorial, not
	the old Linuxdoc one.

2 files changed, 55 insertions, 39 deletions

diff --git a/examples/gtkdial/dial_test.c b/examples/gtkdial/dial_test.c
index 3c2a93a9b..3d02c7956 100644
--- a/examples/gtkdial/dial_test.c
+++ b/examples/gtkdial/dial_test.c
@@ -1,3 +1,4 @@
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <gtk/gtk.h>
diff --git a/examples/gtkdial/gtkdial.c b/examples/gtkdial/gtkdial.c
index 0c0fc8bad..f535081bd 100644
--- a/examples/gtkdial/gtkdial.c
+++ b/examples/gtkdial/gtkdial.c
@@ -1,3 +1,4 @@
+
 /* GTK - The GIMP Toolkit
  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
  *
@@ -28,30 +29,30 @@
 
 /* Forward declarations */
 
-static void gtk_dial_class_init               (GtkDialClass   *klass);
-static void gtk_dial_init                     (GtkDial        *dial);
-static void gtk_dial_destroy                  (GtkObject      *object);
-static void gtk_dial_realize                  (GtkWidget      *widget);
+static void gtk_dial_class_init               (GtkDialClass    *klass);
+static void gtk_dial_init                     (GtkDial         *dial);
+static void gtk_dial_destroy                  (GtkObject        *object);
+static void gtk_dial_realize                  (GtkWidget        *widget);
 static void gtk_dial_size_request             (GtkWidget      *widget,
 					       GtkRequisition *requisition);
-static void gtk_dial_size_allocate            (GtkWidget      *widget,
-					       GtkAllocation  *allocation);
-static gint gtk_dial_expose                   (GtkWidget      *widget,
-                                               GdkEventExpose *event);
-static gint gtk_dial_button_press             (GtkWidget      *widget,
-                                               GdkEventButton *event);
-static gint gtk_dial_button_release           (GtkWidget      *widget,
-                                               GdkEventButton *event);
-static gint gtk_dial_motion_notify            (GtkWidget      *widget,
-                                               GdkEventMotion *event);
-static gint gtk_dial_timer                    (GtkDial        *dial);
+static void gtk_dial_size_allocate            (GtkWidget     *widget,
+					       GtkAllocation *allocation);
+static gint gtk_dial_expose                   (GtkWidget        *widget,
+						GdkEventExpose   *event);
+static gint gtk_dial_button_press             (GtkWidget        *widget,
+						GdkEventButton   *event);
+static gint gtk_dial_button_release           (GtkWidget        *widget,
+						GdkEventButton   *event);
+static gint gtk_dial_motion_notify            (GtkWidget        *widget,
+						GdkEventMotion   *event);
+static gint gtk_dial_timer                    (GtkDial         *dial);
 
 static void gtk_dial_update_mouse             (GtkDial *dial, gint x, gint y);
 static void gtk_dial_update                   (GtkDial *dial);
-static void gtk_dial_adjustment_changed       (GtkAdjustment  *adjustment,
-                                               gpointer        data);
-static void gtk_dial_adjustment_value_changed (GtkAdjustment  *adjustment,
-                                               gpointer        data);
+static void gtk_dial_adjustment_changed       (GtkAdjustment    *adjustment,
+						gpointer          data);
+static void gtk_dial_adjustment_value_changed (GtkAdjustment    *adjustment,
+						gpointer          data);
 
 /* Local data */
 
@@ -140,12 +141,13 @@ gtk_dial_destroy (GtkObject *object)
 {
   GtkDial *dial;
 
+  g_return_if_fail (object != NULL);
   g_return_if_fail (GTK_IS_DIAL (object));
 
   dial = GTK_DIAL (object);
 
   if (dial->adjustment)
-    g_object_unref (G_OBJECT (dial->adjustment));
+    g_object_unref (GTK_OBJECT (dial->adjustment));
 
   if (GTK_OBJECT_CLASS (parent_class)->destroy)
     (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
@@ -154,6 +156,7 @@ gtk_dial_destroy (GtkObject *object)
 GtkAdjustment*
 gtk_dial_get_adjustment (GtkDial *dial)
 {
+  g_return_val_if_fail (dial != NULL, NULL);
   g_return_val_if_fail (GTK_IS_DIAL (dial), NULL);
 
   return dial->adjustment;
@@ -163,6 +166,7 @@ void
 gtk_dial_set_update_policy (GtkDial      *dial,
 			     GtkUpdateType  policy)
 {
+  g_return_if_fail (dial != NULL);
   g_return_if_fail (GTK_IS_DIAL (dial));
 
   dial->policy = policy;
@@ -172,23 +176,24 @@ void
 gtk_dial_set_adjustment (GtkDial      *dial,
 			  GtkAdjustment *adjustment)
 {
+  g_return_if_fail (dial != NULL);
   g_return_if_fail (GTK_IS_DIAL (dial));
 
   if (dial->adjustment)
     {
-      g_signal_handlers_disconnect_by_func (G_OBJECT (dial->adjustment), NULL, (gpointer) dial);
-      g_object_unref (G_OBJECT (dial->adjustment));
+      g_signal_handlers_disconnect_by_func (GTK_OBJECT (dial->adjustment), NULL, (gpointer) dial);
+      g_object_unref (GTK_OBJECT (dial->adjustment));
     }
 
   dial->adjustment = adjustment;
-  g_object_ref (G_OBJECT (dial->adjustment));
+  g_object_ref (GTK_OBJECT (dial->adjustment));
 
-  g_signal_connect (G_OBJECT (adjustment), "changed",
-		    G_CALLBACK (gtk_dial_adjustment_changed),
-		    dial);
-  g_signal_connect (G_OBJECT (adjustment), "value_changed",
-		    G_CALLBACK (gtk_dial_adjustment_value_changed),
-		    dial);
+  g_signal_connect (GTK_OBJECT (adjustment), "changed",
+		    GTK_SIGNAL_FUNC (gtk_dial_adjustment_changed),
+		    (gpointer) dial);
+  g_signal_connect (GTK_OBJECT (adjustment), "value_changed",
+		    GTK_SIGNAL_FUNC (gtk_dial_adjustment_value_changed),
+		    (gpointer) dial);
 
   dial->old_value = adjustment->value;
   dial->old_lower = adjustment->lower;
@@ -204,6 +209,7 @@ gtk_dial_realize (GtkWidget *widget)
   GdkWindowAttr attributes;
   gint attributes_mask;
 
+  g_return_if_fail (widget != NULL);
   g_return_if_fail (GTK_IS_DIAL (widget));
 
   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
@@ -246,6 +252,7 @@ gtk_dial_size_allocate (GtkWidget     *widget,
 {
   GtkDial *dial;
 
+  g_return_if_fail (widget != NULL);
   g_return_if_fail (GTK_IS_DIAL (widget));
   g_return_if_fail (allocation != NULL);
 
@@ -278,6 +285,7 @@ gtk_dial_expose (GtkWidget      *widget,
   gint tick_length;
   gint i, inc;
 
+  g_return_val_if_fail (widget != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_DIAL (widget), FALSE);
   g_return_val_if_fail (event != NULL, FALSE);
 
@@ -352,7 +360,7 @@ gtk_dial_expose (GtkWidget      *widget,
 
   for (i = 0; i <= inc; i++)
     {
-      theta = ((gdouble)i*M_PI / (18*inc/24.) - M_PI/6.);
+      theta = ((gfloat)i*M_PI / (18*inc/24.) - M_PI/6.);
 
       if ((theta - last) < (increment))
 	continue;     
@@ -412,6 +420,7 @@ gtk_dial_button_press (GtkWidget      *widget,
   double d_parallel;
   double d_perpendicular;
 
+  g_return_val_if_fail (widget != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_DIAL (widget), FALSE);
   g_return_val_if_fail (event != NULL, FALSE);
 
@@ -451,6 +460,7 @@ gtk_dial_button_release (GtkWidget      *widget,
 {
   GtkDial *dial;
 
+  g_return_val_if_fail (widget != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_DIAL (widget), FALSE);
   g_return_val_if_fail (event != NULL, FALSE);
 
@@ -467,7 +477,7 @@ gtk_dial_button_release (GtkWidget      *widget,
       
       if ((dial->policy != GTK_UPDATE_CONTINUOUS) &&
 	  (dial->old_value != dial->adjustment->value))
-        gtk_adjustment_value_changed (dial->adjustment);
+	g_signal_emit_by_name (GTK_OBJECT (dial->adjustment), "value_changed");
     }
 
   return FALSE;
@@ -481,6 +491,7 @@ gtk_dial_motion_notify (GtkWidget      *widget,
   GdkModifierType mods;
   gint x, y, mask;
 
+  g_return_val_if_fail (widget != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_DIAL (widget), FALSE);
   g_return_val_if_fail (event != NULL, FALSE);
 
@@ -520,10 +531,11 @@ gtk_dial_motion_notify (GtkWidget      *widget,
 static gint
 gtk_dial_timer (GtkDial *dial)
 {
+  g_return_val_if_fail (dial != NULL, FALSE);
   g_return_val_if_fail (GTK_IS_DIAL (dial), FALSE);
 
   if (dial->policy == GTK_UPDATE_DELAYED)
-    gtk_adjustment_value_changed (dial->adjustment);
+    g_signal_emit_by_name (GTK_OBJECT (dial->adjustment), "value_changed");
 
   return FALSE;
 }
@@ -532,8 +544,9 @@ static void
 gtk_dial_update_mouse (GtkDial *dial, gint x, gint y)
 {
   gint xc, yc;
-  gdouble old_value;
+  gfloat old_value;
 
+  g_return_if_fail (dial != NULL);
   g_return_if_fail (GTK_IS_DIAL (dial));
 
   xc = GTK_WIDGET(dial)->allocation.width / 2;
@@ -558,7 +571,7 @@ gtk_dial_update_mouse (GtkDial *dial, gint x, gint y)
     {
       if (dial->policy == GTK_UPDATE_CONTINUOUS)
 	{
-          gtk_adjustment_value_changed (dial->adjustment);    
+	  g_signal_emit_by_name (GTK_OBJECT (dial->adjustment), "value_changed");
 	}
       else
 	{
@@ -580,8 +593,9 @@ gtk_dial_update_mouse (GtkDial *dial, gint x, gint y)
 static void
 gtk_dial_update (GtkDial *dial)
 {
-  gdouble new_value;
+  gfloat new_value;
   
+  g_return_if_fail (dial != NULL);
   g_return_if_fail (GTK_IS_DIAL (dial));
 
   new_value = dial->adjustment->value;
@@ -594,7 +608,8 @@ gtk_dial_update (GtkDial *dial)
 
   if (new_value != dial->adjustment->value)
     {
-      gtk_adjustment_set_value (dial->adjustment, new_value);
+      dial->adjustment->value = new_value;
+      g_signal_emit_by_name (GTK_OBJECT (dial->adjustment), "value_changed");
     }
 
   dial->angle = 7.*M_PI/6. - (new_value - dial->adjustment->lower) * 4.*M_PI/3. /
@@ -605,12 +620,12 @@ gtk_dial_update (GtkDial *dial)
 
 static void
 gtk_dial_adjustment_changed (GtkAdjustment *adjustment,
-                             gpointer       data)
+			      gpointer       data)
 {
   GtkDial *dial;
 
   g_return_if_fail (adjustment != NULL);
-  g_return_if_fail (GTK_IS_DIAL (data));
+  g_return_if_fail (data != NULL);
 
   dial = GTK_DIAL (data);
 
@@ -633,7 +648,7 @@ gtk_dial_adjustment_value_changed (GtkAdjustment *adjustment,
   GtkDial *dial;
 
   g_return_if_fail (adjustment != NULL);
-  g_return_if_fail (GTK_IS_DIAL (data));
+  g_return_if_fail (data != NULL);
 
   dial = GTK_DIAL (data);