From ce77e1d327653c2c0724d6d4a45564c25d98eda8 Mon Sep 17 00:00:00 2001
From: Ariya Hidayat <ariya.hidayat@trolltech.com>
Date: Thu, 19 Mar 2009 11:26:24 +0100
Subject: Fixes:    Move the bsp depth variable to the BSP tree class.

---
 src/gui/graphicsview/qgraphicsscene.cpp     | 16 ++++++++++++----
 src/gui/graphicsview/qgraphicsscene_bsp.cpp |  2 +-
 src/gui/graphicsview/qgraphicsscene_bsp_p.h |  2 ++
 3 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/src/gui/graphicsview/qgraphicsscene.cpp b/src/gui/graphicsview/qgraphicsscene.cpp
index f8f8e98..6aab9df 100644
--- a/src/gui/graphicsview/qgraphicsscene.cpp
+++ b/src/gui/graphicsview/qgraphicsscene.cpp
@@ -329,7 +329,6 @@ static void _q_hoverFromMouseEvent(QGraphicsSceneHoverEvent *hover, const QGraph
 QGraphicsScenePrivate::QGraphicsScenePrivate()
     : changedSignalMask(0),
       indexMethod(QGraphicsScene::BspTreeIndex),
-      bspTreeDepth(0),
       lastItemCount(0),
       index(new QGraphicsSceneBspTree()),
       hasSceneRect(false),
@@ -540,7 +539,9 @@ void QGraphicsScenePrivate::_q_updateIndex()
 
     // Determine whether we should regenerate the BSP tree.
     if (indexMethod == QGraphicsScene::BspTreeIndex) {
-        int depth = bspTreeDepth;
+        QGraphicsSceneBspTree *bspTree = qobject_cast<QGraphicsSceneBspTree*>(index);
+        Q_ASSERT(bspTree);
+        int depth = bspTree->depth;
         if (depth == 0) {
             int oldDepth = intmaxlog(lastItemCount);
             depth = intmaxlog(indexedItems.size());
@@ -2472,7 +2473,8 @@ QGraphicsSceneIndex* QGraphicsScene::sceneIndex() const
 int QGraphicsScene::bspTreeDepth() const
 {
     Q_D(const QGraphicsScene);
-    return d->bspTreeDepth;
+    QGraphicsSceneBspTree *bspTree = qobject_cast<QGraphicsSceneBspTree*>(d->index);
+    return bspTree ? bspTree->depth : 0;
 }
 void QGraphicsScene::setBspTreeDepth(int depth)
 {
@@ -2485,7 +2487,13 @@ void QGraphicsScene::setBspTreeDepth(int depth)
         return;
     }
 
-    d->bspTreeDepth = depth;
+    QGraphicsSceneBspTree *bspTree = qobject_cast<QGraphicsSceneBspTree*>(d->index);
+    if (!bspTree) {
+        qWarning("QGraphicsScene::setBspTreeDepth: can not apply if indexing method is not BSP");
+        return;
+    }
+
+    bspTree->depth = depth;
     d->resetIndex();
 }
 
diff --git a/src/gui/graphicsview/qgraphicsscene_bsp.cpp b/src/gui/graphicsview/qgraphicsscene_bsp.cpp
index 29c54bb..a81b14d 100644
--- a/src/gui/graphicsview/qgraphicsscene_bsp.cpp
+++ b/src/gui/graphicsview/qgraphicsscene_bsp.cpp
@@ -84,7 +84,7 @@ public:
 };
 
 QGraphicsSceneBspTree::QGraphicsSceneBspTree(QObject *parent)
-    : QGraphicsSceneIndex(parent), leafCnt(0)
+    : QGraphicsSceneIndex(parent), depth(0), leafCnt(0)
 {
     insertVisitor = new QGraphicsSceneInsertItemBspTreeVisitor;
     removeVisitor = new QGraphicsSceneRemoveItemBspTreeVisitor;
diff --git a/src/gui/graphicsview/qgraphicsscene_bsp_p.h b/src/gui/graphicsview/qgraphicsscene_bsp_p.h
index 8b7d753..69d9eee 100644
--- a/src/gui/graphicsview/qgraphicsscene_bsp_p.h
+++ b/src/gui/graphicsview/qgraphicsscene_bsp_p.h
@@ -102,6 +102,8 @@ public:
 
     int leafCount() const;
 
+    int depth;
+
 private:
 
     inline int firstChildIndex(int index) const
-- 
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