From 91aeceb7132f4afae0996443a162a5783d8f17aa Mon Sep 17 00:00:00 2001
From: Olivier Goffart <ogoffart@trolltech.com>
Date: Tue, 14 Apr 2009 10:02:42 +0200
Subject: Fix crash in QTreeView

Discovered in Kopete trunk

BT: yes
Reviewed-by: Thierry
---
 src/gui/itemviews/qtreeview.cpp        |  1 +
 tests/auto/qtreeview/tst_qtreeview.cpp | 26 +++++++++++++++++++++++++-
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/src/gui/itemviews/qtreeview.cpp b/src/gui/itemviews/qtreeview.cpp
index 0117db2..62c1277 100644
--- a/src/gui/itemviews/qtreeview.cpp
+++ b/src/gui/itemviews/qtreeview.cpp
@@ -2019,6 +2019,7 @@ int QTreeView::verticalOffset() const
         // If we are scrolling per item and have non-uniform row heights,
         // finding the vertical offset in pixels is going to be relatively slow.
         // ### find a faster way to do this
+        d->executePostedLayout();
         int offset = 0;
         for (int i = 0; i < d->viewItems.count(); ++i) {
             if (i == verticalScrollBar()->value())
diff --git a/tests/auto/qtreeview/tst_qtreeview.cpp b/tests/auto/qtreeview/tst_qtreeview.cpp
index e1d405d..dfccd9e 100644
--- a/tests/auto/qtreeview/tst_qtreeview.cpp
+++ b/tests/auto/qtreeview/tst_qtreeview.cpp
@@ -209,6 +209,8 @@ private slots:
     void indexRowSizeHint();
     void addRowsWhileSectionsAreHidden();
 
+    void filterProxyModelCrash();
+
     // task-specific tests:
     void task174627_moveLeftToRoot();
     void task171902_expandWith1stColHidden();
@@ -2829,6 +2831,29 @@ void tst_QTreeView::indexRowSizeHint()
     QCOMPARE(view.indexRowSizeHint(index), w->sizeHint().height());
 }
 
+void tst_QTreeView::filterProxyModelCrash()
+{
+    QStandardItemModel model;
+    QList<QStandardItem *> items;
+    for (int i = 0; i < 100; i++)
+        items << new QStandardItem(QString::fromLatin1("item %1").arg(i));
+    model.appendColumn(items);
+
+    QSortFilterProxyModel proxy;
+    proxy.setSourceModel(&model);
+
+    QTreeView view;
+    view.setModel(&proxy);
+    view.show();
+    QTest::qWait(30);
+    proxy.invalidate();
+    view.verticalScrollBar()->setValue(15);
+    QTest::qWait(20);
+
+    proxy.invalidate();
+    view.repaint(); //used to crash
+}
+
 class task174627_TreeView : public QTreeView
 {
     Q_OBJECT
@@ -3254,6 +3279,5 @@ void tst_QTreeView::task246536_scrollbarsNotWorking()
     QVERIFY(o.count > 0);
 }
 
-
 QTEST_MAIN(tst_QTreeView)
 #include "tst_qtreeview.moc"
-- 
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