QTreeWidget: Keep items hidden even if their parents are reparented

When an item is explicitly hidden, then it should stay that way even if
its parent is reparented. The item itself needs to be explicitly shown
for it to be made visible.

Task-number: QTBUG-54843
Change-Id: I0c6eea9a936f82d5874e3246292bd16365440411
Reviewed-by: Christian Ehrlicher <ch.ehrlicher@gmx.de>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

1 files changed, 30 insertions, 0 deletions

diff --git a/tests/auto/widgets/itemviews/qtreewidget/tst_qtreewidget.cpp b/tests/auto/widgets/itemviews/qtreewidget/tst_qtreewidget.cpp
index 1f438f59eb..db1b0d426a 100644
--- a/tests/auto/widgets/itemviews/qtreewidget/tst_qtreewidget.cpp
+++ b/tests/auto/widgets/itemviews/qtreewidget/tst_qtreewidget.cpp
@@ -160,6 +160,7 @@ private slots:
     void task20345_sortChildren();
     void getMimeDataWithInvalidItem();
     void testVisualItemRect();
+    void reparentHiddenItem();
 
 public slots:
     void itemSelectionChanged();
@@ -3498,5 +3499,34 @@ void tst_QTreeWidget::testVisualItemRect()
     QCOMPARE(r.width(), sectionSize);
 }
 
+void tst_QTreeWidget::reparentHiddenItem()
+{
+    QTreeWidgetItem *parent = new QTreeWidgetItem(testWidget);
+    parent->setText(0, "parent");
+    QTreeWidgetItem *otherParent = new QTreeWidgetItem(testWidget);
+    otherParent->setText(0, "other parent");
+    QTreeWidgetItem *child = new QTreeWidgetItem(parent);
+    child->setText(0, "child");
+    QTreeWidgetItem *grandChild = new QTreeWidgetItem(child);
+    grandChild->setText(0, "grandchild");
+    QVERIFY(child->parent());
+    QVERIFY(grandChild->parent());
+
+    testWidget->expandItem(parent);
+    testWidget->expandItem(otherParent);
+    testWidget->expandItem(child);
+
+    QVERIFY(!parent->isHidden());
+    QVERIFY(!child->isHidden());
+    QVERIFY(!grandChild->isHidden());
+
+    grandChild->setHidden(true);
+
+    QVERIFY(grandChild->isHidden());
+    parent->removeChild(child);
+    otherParent->addChild(child);
+    QVERIFY(grandChild->isHidden());
+}
+
 QTEST_MAIN(tst_QTreeWidget)
 #include "tst_qtreewidget.moc"