Mouse wheel wouldn't scroll the itemview when over header views

The mouse wheel event was not being relayed to the parent (supposedly QAbstractScrollArea) widget. Auto-test included.

Reviewed-by: Olivier
Task-number: QTBUG-5237

2 files changed, 23 insertions, 1 deletions

diff --git a/src/gui/itemviews/qheaderview.cpp b/src/gui/itemviews/qheaderview.cpp
index 6f2cff9..5df8481 100644
--- a/src/gui/itemviews/qheaderview.cpp
+++ b/src/gui/itemviews/qheaderview.cpp
@@ -2396,7 +2396,12 @@ bool QHeaderView::viewportEvent(QEvent *e)
         d->state = QHeaderViewPrivate::NoState;
         d->pressed = d->section = d->target = -1;
         d->updateSectionIndicator(d->section, -1);
-    }
+        break; }
+    case QEvent::Wheel: {
+        QAbstractScrollArea *asa = qobject_cast<QAbstractScrollArea *>(parentWidget());
+        if (asa)
+            return QApplication::sendEvent(asa->viewport(), e);
+        break; }
     default:
         break;
     }
diff --git a/tests/auto/qtableview/tst_qtableview.cpp b/tests/auto/qtableview/tst_qtableview.cpp
index f571e8a..33c7067 100644
--- a/tests/auto/qtableview/tst_qtableview.cpp
+++ b/tests/auto/qtableview/tst_qtableview.cpp
@@ -198,6 +198,7 @@ private slots:
     void task191545_dragSelectRows();
     void taskQTBUG_5062_spansInconsistency();
     void taskQTBUG_4516_clickOnRichTextLabel();
+    void taskQTBUG_5237_wheelEventOnHeader();
 
     void mouseWheel_data();
     void mouseWheel();
@@ -3922,6 +3923,22 @@ void tst_QTableView::changeHeaderData()
     QVERIFY(view.verticalHeader()->width() > textWidth);
 }
 
+void tst_QTableView::taskQTBUG_5237_wheelEventOnHeader()
+{
+    QTableView view;
+    QStandardItemModel model(500,5);
+    view.setModel(&model);
+    view.show();
+    QTest::qWaitForWindowShown(&view);
+
+    int sbValueBefore = view.verticalScrollBar()->value();
+    QHeaderView *header = view.verticalHeader();
+    QTest::mouseMove(header);
+    QWheelEvent wheelEvent(header->geometry().center(), -720, 0, 0);
+    QApplication::sendEvent(header->viewport(), &wheelEvent);
+    int sbValueAfter = view.verticalScrollBar()->value();
+    QVERIFY(sbValueBefore != sbValueAfter);
+}
 
 QTEST_MAIN(tst_QTableView)
 #include "tst_qtableview.moc"