QHeaderView: relayout on resetDefaultSectionSize

We now call setDefaultSectionSize with the new default section size.
This clamps the value to min/max section size and it will resize
affected sections.

Pick-to: 6.5 6.6
Fixes: QTBUG-116013
Change-Id: I39849aca8d0672629ce0b3ca244038c27e045d4b
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/auto/widgets/itemviews/qtableview/tst_qtableview.cpp b/tests/auto/widgets/itemviews/qtableview/tst_qtableview.cpp
index 2e59ac2990..be30b48be1 100644
--- a/tests/auto/widgets/itemviews/qtableview/tst_qtableview.cpp
+++ b/tests/auto/widgets/itemviews/qtableview/tst_qtableview.cpp
@@ -423,6 +423,7 @@ private slots:
     void selectColumnsAndCells();
     void selectWithHeader_data();
     void selectWithHeader();
+    void resetDefaultSectionSize();
 
 #if QT_CONFIG(wheelevent)
     void mouseWheel_data();
@@ -4909,6 +4910,21 @@ void tst_QTableView::selectWithHeader()
     QVERIFY(!isSelected());
 }
 
+void tst_QTableView::resetDefaultSectionSize()
+{
+    // Create a table and change its default section size and then reset it.
+    // This should be a no op so clicking on row 1 should select row 1 and not row
+    // 0 as previously. QTBUG-116013
+    QTableWidget view(10, 10);
+    view.resize(300, 300);
+    view.verticalHeader()->setSectionResizeMode(QHeaderView::Fixed);
+    view.verticalHeader()->setDefaultSectionSize(120);
+    view.verticalHeader()->resetDefaultSectionSize();
+    view.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&view));
+    QCOMPARE(view.verticalHeader()->logicalIndexAt(9, 45), 1);
+}
+
 // This has nothing to do with QTableView, but it's convenient to reuse the QtTestTableModel
 #if QT_CONFIG(textmarkdownwriter)