[gtkglarea] examples: Use accessor functions intead direct access

[Javier Jardón <jjardon src gnome org>]

commit 410dedb7da8d9b329916a9aa842e0e492eaeaded
Author: Javier Jardón <jjardon gnome org>
Date:   Thu Mar 20 00:48:11 2014 +0000

    examples: Use accessor functions intead direct access

 examples/simple.c |    8 ++++++--
 examples/viewlw.c |   10 +++++++---
 examples/zktor.c  |    8 ++++++--
 3 files changed, 19 insertions(+), 7 deletions(-)
---
diff --git a/examples/simple.c b/examples/simple.c
index 3948fdd..49833fe 100644
--- a/examples/simple.c
+++ b/examples/simple.c
@@ -26,7 +26,9 @@ gint init(GtkWidget *widget)
   /* OpenGL functions can be called only if make_current returns true */
   if (gtk_gl_area_make_current(GTK_GL_AREA(widget)))
     {
-      glViewport(0,0, widget->allocation.width, widget->allocation.height);
+      GtkAllocation allocation;
+      gtk_widget_get_allocation (widget, &allocation);
+      glViewport(0, 0, allocation.width, allocation.height);
       glMatrixMode(GL_PROJECTION);
       glLoadIdentity();
       glOrtho(0,100, 100,0, -1,1);
@@ -72,7 +74,9 @@ gint reshape(GtkWidget *widget, GdkEventConfigure *event)
   /* OpenGL functions can be called only if make_current returns true */
   if (gtk_gl_area_make_current(GTK_GL_AREA(widget)))
     {
-      glViewport(0,0, widget->allocation.width, widget->allocation.height);
+      GtkAllocation allocation;
+      gtk_widget_get_allocation (widget, &allocation);
+      glViewport(0, 0, allocation.width, allocation.height);
     }
   return TRUE;
 }
diff --git a/examples/viewlw.c b/examples/viewlw.c
index 7ac9f43..8ec279c 100644
--- a/examples/viewlw.c
+++ b/examples/viewlw.c
@@ -141,7 +141,9 @@ gint glarea_configure(GtkWidget *widget, GdkEventConfigure *event)
 {
   /* OpenGL calls can be done only if make_current returns true */
   if (gtk_gl_area_make_current(GTK_GL_AREA(widget))) {
-    glViewport(0,0, widget->allocation.width, widget->allocation.height);
+      GtkAllocation allocation;
+      gtk_widget_get_allocation (widget, &allocation);
+      glViewport(0, 0, allocation.width, allocation.height);
   }
   return TRUE;
 }
@@ -174,6 +176,7 @@ gint glarea_motion_notify(GtkWidget *widget, GdkEventMotion *event)
   int x, y;
   GdkRectangle area;
   GdkModifierType state;
+  GtkAllocation allocation;
   mesh_info *info = (mesh_info*)gtk_object_get_data(GTK_OBJECT(widget), "mesh_info");
 
   if (event->is_hint) {
@@ -189,8 +192,9 @@ gint glarea_motion_notify(GtkWidget *widget, GdkEventMotion *event)
 
   area.x = 0;
   area.y = 0;
-  area.width  = widget->allocation.width;
-  area.height = widget->allocation.height;
+  gtk_widget_get_allocation (widget, &allocation);
+  area.width  = allocation.width;
+  area.height = allocation.height;
 
   if (state & GDK_BUTTON1_MASK) {
     /* drag in progress, simulate trackball */
diff --git a/examples/zktor.c b/examples/zktor.c
index c642d4d..cba8d69 100644
--- a/examples/zktor.c
+++ b/examples/zktor.c
@@ -743,7 +743,9 @@ gint init(GtkWidget *widget)
 #endif
 
     /* set viewport */
-    glViewport(0,0, widget->allocation.width, widget->allocation.height);
+    GtkAllocation allocation;
+    gtk_widget_get_allocation (widget, &allocation);
+    glViewport(0, 0, allocation.width, allocation.height);
 
 #if !defined(WIN32)
     /* generate font display lists */
@@ -781,7 +783,9 @@ gint reshape(GtkWidget *widget, GdkEventConfigure *event)
   /* OpenGL functions can be called only if make_current returns true */
   if (gtk_gl_area_make_current(GTK_GL_AREA(widget)))
     {
-      glViewport(0,0, widget->allocation.width, widget->allocation.height);
+      GtkAllocation allocation;
+      gtk_widget_get_allocation (widget, &allocation);
+      glViewport(0, 0, allocation.width, allocation.height);
     }
   return TRUE;
 }