From d1221d84714a169e12192cfa073af11db61bfbcc Mon Sep 17 00:00:00 2001
From: Olivier Goffart <ogoffart@trolltech.com>
Date: Thu, 16 Apr 2009 17:29:36 +0200
Subject: QSortFilterProxyModel: In dynamic filter model, childs of temporarly
 filtered items are not correctly updated.

when filtering away a row, we should remove all the mapping of the
children

Task-number: 251296
Reviewed-by: Marius Bugge Monsen
---
 src/gui/itemviews/qsortfilterproxymodel.cpp        | 14 +++++++-
 .../tst_qsortfilterproxymodel.cpp                  | 42 ++++++++++++++++++++++
 2 files changed, 55 insertions(+), 1 deletion(-)

diff --git a/src/gui/itemviews/qsortfilterproxymodel.cpp b/src/gui/itemviews/qsortfilterproxymodel.cpp
index 2c9eeea..a1d35b0 100644
--- a/src/gui/itemviews/qsortfilterproxymodel.cpp
+++ b/src/gui/itemviews/qsortfilterproxymodel.cpp
@@ -1032,9 +1032,21 @@ void QSortFilterProxyModelPrivate::_q_sourceDataChanged(const QModelIndex &sourc
         }
     }
 
-    if (!source_rows_remove.isEmpty())
+    if (!source_rows_remove.isEmpty()) {
         remove_source_items(m->proxy_rows, m->source_rows,
                             source_rows_remove, source_parent, Qt::Vertical);
+        QSet<int> source_rows_remove_set = source_rows_remove.toSet();
+        QVector<QModelIndex>::iterator it = m->mapped_children.begin();
+        while (it != m->mapped_children.end()) {
+            const QModelIndex source_child_index = *it;
+            if (source_rows_remove_set.contains(source_child_index.row())) {
+                it = m->mapped_children.erase(it);
+                remove_from_mapping(source_child_index);
+            } else {
+                ++it;
+            }
+        }
+    }
 
     if (!source_rows_resort.isEmpty()) {
         // Re-sort the rows
diff --git a/tests/auto/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp b/tests/auto/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp
index 4a749f0..18aa5fc 100644
--- a/tests/auto/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp
+++ b/tests/auto/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp
@@ -132,6 +132,7 @@ private slots:
     void task248868_staticSorting();
     void task248868_dynamicSorting();
     void task250023_fetchMore();
+    void task251296_hiddenChildren();
 
 protected:
     void buildHierarchy(const QStringList &data, QAbstractItemModel *model);
@@ -2675,6 +2676,47 @@ void tst_QSortFilterProxyModel::task250023_fetchMore()
     QCOMPARE(proxy.columnCount(idx), 10);
 }
 
+void tst_QSortFilterProxyModel::task251296_hiddenChildren()
+{
+    QStandardItemModel model;
+    QSortFilterProxyModel proxy;
+    proxy.setSourceModel(&model);
+    proxy.setDynamicSortFilter(true);
+
+    QStandardItem *itemA = new QStandardItem("A VISIBLE");
+    model.appendRow(itemA);
+    QStandardItem *itemB = new QStandardItem("B VISIBLE");
+    itemA->appendRow(itemB);
+    QStandardItem *itemC = new QStandardItem("C");
+    itemA->appendRow(itemC);
+    proxy.setFilterRegExp("VISIBLE");
+
+    QCOMPARE(proxy.rowCount(QModelIndex()) , 1);
+    QPersistentModelIndex indexA = proxy.index(0,0);
+    QCOMPARE(proxy.data(indexA).toString(), QString::fromLatin1("A VISIBLE"));
+
+    QCOMPARE(proxy.rowCount(indexA) , 1);
+    QPersistentModelIndex indexB = proxy.index(0, 0, indexA);
+    QCOMPARE(proxy.data(indexB).toString(), QString::fromLatin1("B VISIBLE"));
+
+    itemA->setText("A");
+    QCOMPARE(proxy.rowCount(QModelIndex()), 0);
+    QVERIFY(!indexA.isValid());
+    QVERIFY(!indexB.isValid());
+
+    itemB->setText("B");
+    itemA->setText("A VISIBLE");
+    itemC->setText("C VISIBLE");
+
+    QCOMPARE(proxy.rowCount(QModelIndex()), 1);
+    indexA = proxy.index(0,0);
+    QCOMPARE(proxy.data(indexA).toString(), QString::fromLatin1("A VISIBLE"));
+
+    QCOMPARE(proxy.rowCount(indexA) , 1);
+    QModelIndex indexC = proxy.index(0, 0, indexA);
+    QCOMPARE(proxy.data(indexC).toString(), QString::fromLatin1("C VISIBLE"));
+}
+
 
 QTEST_MAIN(tst_QSortFilterProxyModel)
 #include "tst_qsortfilterproxymodel.moc"
-- 
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