Fix touch point positions of non-transformable QGraphicsItems

TouchEvent::TouchPoint::pos was not updated in
QGraphicsScenePrivate::updateTouchPointsForItem().

To prevent the transformation being calculated repeatedly for each touch
point member, extract a function genericMapFromSceneTransform()
from genericMapFromScene() returning the transformation and use
that whereever multiple points are transformed.

Add a test, extracting helper functionality from
tst_QGraphicsItem::touchEventPropagation().
In addition, fold tst_QGraphicsScene::checkTouchPointsEllipseDiameters() from
c48f4bde0044bd5b23af231f3639d0779ecbdb03 into this test, so that
it is testing all transformations.

Task-number: QTBUG-66192
Change-Id: If71886d2c14c4e216f7781ea2f22f1adc444e6cf
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

1 files changed, 0 insertions, 76 deletions

diff --git a/tests/auto/widgets/graphicsview/qgraphicsscene/tst_qgraphicsscene.cpp b/tests/auto/widgets/graphicsview/qgraphicsscene/tst_qgraphicsscene.cpp
index fe8571abf1..3b340d06ab 100644
--- a/tests/auto/widgets/graphicsview/qgraphicsscene/tst_qgraphicsscene.cpp
+++ b/tests/auto/widgets/graphicsview/qgraphicsscene/tst_qgraphicsscene.cpp
@@ -254,7 +254,6 @@ private slots:
     void zeroScale();
     void focusItemChangedSignal();
     void minimumRenderSize();
-    void checkTouchPointsEllipseDiameters();
 
     // task specific tests below me
     void task139710_bspTreeCrash();
@@ -4765,81 +4764,6 @@ void tst_QGraphicsScene::minimumRenderSize()
     QVERIFY(smallChild->repaints > smallerGrandChild->repaints);
 }
 
-class TouchItem : public QGraphicsRectItem
-{
-public:
-    TouchItem() : QGraphicsRectItem(QRectF(-10, -10, 20, 20)),
-    seenTouch(false)
-    {
-        setAcceptTouchEvents(true);
-        setFlag(QGraphicsItem::ItemIgnoresTransformations);
-    }
-    bool seenTouch;
-    QList<QTouchEvent::TouchPoint> touchPoints;
-protected:
-    bool sceneEvent(QEvent *event) override
-    {
-        switch (event->type()) {
-            case QEvent::TouchBegin:
-            case QEvent::TouchUpdate:
-            case QEvent::TouchEnd:
-                seenTouch = true;
-                touchPoints = static_cast<QTouchEvent *>(event)->touchPoints();
-                event->accept();
-                return true;
-            default:
-                break;
-        }
-        return QGraphicsRectItem::sceneEvent(event);
-    }
-};
-
-void tst_QGraphicsScene::checkTouchPointsEllipseDiameters()
-{
-    QGraphicsScene scene;
-    QGraphicsView view(&scene);
-    scene.setSceneRect(1, 1, 198, 198);
-    view.scale(1.5, 1.5);
-    view.setFocus();
-    TouchItem *rect = new TouchItem;
-    scene.addItem(rect);
-    view.show();
-    QApplication::setActiveWindow(&view);
-    QVERIFY(QTest::qWaitForWindowActive(&view));
-
-    const QSizeF ellipseDiameters(10.0, 10.0);
-    QTouchEvent::TouchPoint touchPoint(0);
-    touchPoint.setState(Qt::TouchPointPressed);
-    touchPoint.setPos(view.mapFromScene(rect->mapToScene(rect->boundingRect().center())));
-    touchPoint.setScreenPos(view.mapToGlobal(touchPoint.pos().toPoint()));
-    touchPoint.setEllipseDiameters(ellipseDiameters);
-
-    QList<QTouchEvent::TouchPoint> touchPoints = { touchPoint };
-
-    QTouchDevice *testDevice = QTest::createTouchDevice(QTouchDevice::TouchPad);
-    QTouchEvent touchEvent(QEvent::TouchBegin,
-                           testDevice,
-                           Qt::NoModifier,
-                           Qt::TouchPointPressed,
-                           touchPoints);
-    QApplication::sendEvent(view.viewport(), &touchEvent);
-    QVERIFY(rect->seenTouch);
-    QVERIFY(rect->touchPoints.size() == 1);
-    QCOMPARE(ellipseDiameters, rect->touchPoints.first().ellipseDiameters());
-
-    rect->seenTouch = false;
-    rect->touchPoints.clear();
-    QTouchEvent touchUpdateEvent(QEvent::TouchUpdate,
-                                 testDevice,
-                                 Qt::NoModifier,
-                                 Qt::TouchPointMoved,
-                                 touchPoints);
-    QApplication::sendEvent(view.viewport(), &touchEvent);
-    QVERIFY(rect->seenTouch);
-    QVERIFY(rect->touchPoints.size() == 1);
-    QCOMPARE(ellipseDiameters, rect->touchPoints.first().ellipseDiameters());
-}
-
 void tst_QGraphicsScene::taskQTBUG_15977_renderWithDeviceCoordinateCache()
 {
     QGraphicsScene scene;