From a0da371e2af8e09b9eea9a3fcab8e922fd935620 Mon Sep 17 00:00:00 2001
From: Laurent Rineau <laurent.rineau@cgal.org>
Date: Thu, 17 Jul 2014 19:53:12 +0200
Subject: [PATCH] Fix a runtime bug

The dynamic type of my `model` object is no longer a `Scene`, but that
it a proxy model for the scene!
---
 Polyhedron/demo/Polyhedron/Scene.cpp | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/Polyhedron/demo/Polyhedron/Scene.cpp b/Polyhedron/demo/Polyhedron/Scene.cpp
index eb63ffc711a..c1f3f388afc 100644
--- a/Polyhedron/demo/Polyhedron/Scene.cpp
+++ b/Polyhedron/demo/Polyhedron/Scene.cpp
@@ -14,6 +14,7 @@
 #include <QApplication>
 #include <QPointer>
 #include <QList>
+#include <QAbstractProxyModel>
 
 namespace {
   void CGALglcolor(QColor c)
@@ -588,7 +589,9 @@ bool SceneDelegate::editorEvent(QEvent *event, QAbstractItemModel *model,
 				const QStyleOptionViewItem &option,
 				const QModelIndex &index)
 {
-  Scene *scene = static_cast<Scene*>(model);
+  QAbstractProxyModel* proxyModel = dynamic_cast<QAbstractProxyModel*>(model);
+  Q_ASSERT(proxyModel);
+  Scene *scene = dynamic_cast<Scene*>(proxyModel->sourceModel());
   Q_ASSERT(scene);
   switch(index.column()) {
   case Scene::VisibleColumn:
@@ -655,8 +658,8 @@ bool SceneDelegate::editorEvent(QEvent *event, QAbstractItemModel *model,
       else {
 	scene->item_B = index.row();
       }
-      scene->dataChanged(scene->createIndex(Scene::ABColumn, 0),
-	scene->createIndex(Scene::ABColumn, scene->rowCount()));
+      scene->dataChanged(scene->createIndex(0, Scene::ABColumn),
+                         scene->createIndex(scene->rowCount() - 1, Scene::ABColumn));
     }
     return false;
     break;