Add WheelHandler

It can be used to change any qreal property of its target Item in
response to wheel rotation, or it can be used in other ways that involve
bindings but without a target item.

[ChangeLog][QtQuick][Event Handlers] Added WheelHandler, which handles
mouse wheel rotation by modifying arbitrary Item properties.

Fixes: QTBUG-68119
Change-Id: I247e2325ee993cc1b91a47fbd6c4ba0ffde7ad49
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>

5 files changed, 457 insertions, 0 deletions

diff --git a/tests/auto/quick/pointerhandlers/pointerhandlers.pro b/tests/auto/quick/pointerhandlers/pointerhandlers.pro
index 950d6835eb..4d6311bdb2 100644
--- a/tests/auto/quick/pointerhandlers/pointerhandlers.pro
+++ b/tests/auto/quick/pointerhandlers/pointerhandlers.pro
@@ -10,4 +10,5 @@ qtConfig(private_tests) {
         qquickpointerhandler \
         qquickpointhandler \
         qquicktaphandler \
+        qquickwheelhandler \
 }
diff --git a/tests/auto/quick/pointerhandlers/qquickwheelhandler/data/nested.qml b/tests/auto/quick/pointerhandlers/qquickwheelhandler/data/nested.qml
new file mode 100644
index 0000000000..3243515180
--- /dev/null
+++ b/tests/auto/quick/pointerhandlers/qquickwheelhandler/data/nested.qml
@@ -0,0 +1,55 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.14
+
+Rectangle {
+    width: 320; height: 240
+    color: "lightsteelblue"; antialiasing: true
+    border.color: outerWheelHandler.active ? "red" : "white"
+
+    WheelHandler {
+        id: outerWheelHandler
+        objectName: "outerWheelHandler"
+        property: "x"
+    }
+
+    Rectangle {
+        width: 120; height: 120; x: 100; y: 60
+        color: "beige"; antialiasing: true
+        border.color: innerWheelHandler.active ? "red" : "white"
+
+        WheelHandler {
+            id: innerWheelHandler
+            objectName: "innerWheelHandler"
+            // should deactivate because events go to the outer handler, not because of timeout
+            activeTimeout: 1
+            property: "x"
+        }
+    }
+}
diff --git a/tests/auto/quick/pointerhandlers/qquickwheelhandler/data/rectWheel.qml b/tests/auto/quick/pointerhandlers/qquickwheelhandler/data/rectWheel.qml
new file mode 100644
index 0000000000..b2272a57c2
--- /dev/null
+++ b/tests/auto/quick/pointerhandlers/qquickwheelhandler/data/rectWheel.qml
@@ -0,0 +1,43 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.14
+
+Rectangle {
+    width: 320; height: 240
+    color: "green"; antialiasing: true
+
+    Rectangle {
+        width: 100; height: 2; anchors.centerIn: parent
+        Rectangle {
+            width: 2; height: 100; anchors.centerIn: parent
+        }
+    }
+
+    WheelHandler { }
+}
diff --git a/tests/auto/quick/pointerhandlers/qquickwheelhandler/qquickwheelhandler.pro b/tests/auto/quick/pointerhandlers/qquickwheelhandler/qquickwheelhandler.pro
new file mode 100644
index 0000000000..7509e38dd3
--- /dev/null
+++ b/tests/auto/quick/pointerhandlers/qquickwheelhandler/qquickwheelhandler.pro
@@ -0,0 +1,14 @@
+CONFIG += testcase
+TARGET = tst_qquickwheelhandler
+macos:CONFIG -= app_bundle
+
+SOURCES += tst_qquickwheelhandler.cpp
+OTHER_FILES = \
+    data/rectWheel.qml \
+
+include (../../../shared/util.pri)
+include (../../shared/util.pri)
+
+TESTDATA = data/*
+
+QT += core-private gui-private qml-private quick-private testlib
diff --git a/tests/auto/quick/pointerhandlers/qquickwheelhandler/tst_qquickwheelhandler.cpp b/tests/auto/quick/pointerhandlers/qquickwheelhandler/tst_qquickwheelhandler.cpp
new file mode 100644
index 0000000000..2abf2ea8c3
--- /dev/null
+++ b/tests/auto/quick/pointerhandlers/qquickwheelhandler/tst_qquickwheelhandler.cpp
@@ -0,0 +1,344 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtTest/QtTest>
+#include <QtTest/QSignalSpy>
+#include <QtGui/QStyleHints>
+#include <qpa/qwindowsysteminterface.h>
+#include <private/qquickwheelhandler_p.h>
+#include <QtQuick/private/qquickrectangle_p.h>
+#include <QtQuick/qquickview.h>
+#include <QtQml/qqmlcontext.h>
+#include "../../../shared/util.h"
+#include "../../shared/viewtestutil.h"
+
+Q_LOGGING_CATEGORY(lcPointerTests, "qt.quick.pointer.tests")
+
+class tst_QQuickWheelHandler: public QQmlDataTest
+{
+    Q_OBJECT
+public:
+    tst_QQuickWheelHandler() { }
+
+private slots:
+    void singleHandler_data();
+    void singleHandler();
+    void nestedHandler_data();
+    void nestedHandler();
+
+private:
+    void sendWheelEvent(QQuickView &window, QPoint pos, QPoint angleDelta,
+                        QPoint pixelDelta = QPoint(), Qt::KeyboardModifiers modifiers = Qt::NoModifier,
+                        Qt::ScrollPhase phase = Qt::NoScrollPhase, bool inverted = false);
+};
+
+void tst_QQuickWheelHandler::sendWheelEvent(QQuickView &window, QPoint pos, QPoint angleDelta,
+                                            QPoint pixelDelta, Qt::KeyboardModifiers modifiers, Qt::ScrollPhase phase, bool inverted)
+{
+    QWheelEvent wheelEvent(pos, window.mapToGlobal(pos), pixelDelta, angleDelta,
+                           Qt::NoButton, modifiers, phase, inverted);
+    QGuiApplication::sendEvent(&window, &wheelEvent);
+    qApp->processEvents();
+}
+
+void tst_QQuickWheelHandler::singleHandler_data()
+{
+    // handler properties
+    QTest::addColumn<Qt::Orientation>("orientation");
+    QTest::addColumn<bool>("invertible");
+    QTest::addColumn<int>("rotationScale");
+    QTest::addColumn<QString>("property");
+    QTest::addColumn<qreal>("targetScaleMultiplier");
+    QTest::addColumn<bool>("targetTransformAroundCursor");
+    // event
+    QTest::addColumn<QPoint>("eventPos");
+    QTest::addColumn<QPoint>("eventAngleDelta");
+    QTest::addColumn<QPoint>("eventPixelDelta");
+    QTest::addColumn<Qt::KeyboardModifiers>("eventModifiers");
+    QTest::addColumn<bool>("eventPhases");
+    QTest::addColumn<bool>("eventInverted");
+    // result
+    QTest::addColumn<QPoint>("expectedPosition");
+    QTest::addColumn<qreal>("expectedScale");
+    QTest::addColumn<int>("expectedRotation");
+
+    // move the item
+    QTest::newRow("vertical wheel angle delta to adjust x")
+            << Qt::Vertical << false << 1 << "x" << 1.5 << true
+            << QPoint(160, 120) << QPoint(-360, 120) << QPoint() << Qt::KeyboardModifiers(Qt::NoModifier) << false << false
+            << QPoint(15, 0) << 1.0 << 0;
+    QTest::newRow("horizontal wheel angle delta to adjust y")
+            << Qt::Horizontal << false << 1 << "y" << 1.5 << false
+            << QPoint(160, 120) << QPoint(-360, 120) << QPoint() << Qt::KeyboardModifiers(Qt::NoModifier) << false << false
+            << QPoint(0, -45) << 1.0 << 0;
+    QTest::newRow("vertical wheel angle delta to adjust y, amplified and inverted")
+            << Qt::Vertical << true << 4 << "y" << 1.5 << true
+            << QPoint(160, 120) << QPoint(60, 60) << QPoint() << Qt::KeyboardModifiers(Qt::NoModifier) << false << true
+            << QPoint(0, 30) << 1.0 << 0;
+    QTest::newRow("horizontal wheel angle delta to adjust x, amplified and reversed")
+            << Qt::Horizontal << false << -4 << "x" << 1.5 << false
+            << QPoint(160, 120) << QPoint(60, 60) << QPoint() << Qt::KeyboardModifiers(Qt::NoModifier) << false << false
+            << QPoint(-30, 0) << 1.0 << 0;
+    QTest::newRow("vertical wheel pixel delta to adjust x")
+            << Qt::Vertical << false << 1 << "x" << 1.5 << true
+            << QPoint(160, 120) << QPoint(-360, 120) << QPoint(20, 20) << Qt::KeyboardModifiers(Qt::NoModifier) << true << false
+            << QPoint(20, 0) << 1.0 << 0;
+    QTest::newRow("horizontal wheel pixel delta to adjust y")
+            << Qt::Horizontal << false << 1 << "y" << 1.5 << false
+            << QPoint(160, 120) << QPoint(-360, 120) << QPoint(20, 20) << Qt::KeyboardModifiers(Qt::NoModifier) << true << false
+            << QPoint(0, 20) << 1.0 << 0;
+    QTest::newRow("vertical wheel pixel delta to adjust y, amplified and inverted")
+            << Qt::Vertical << true << 4 << "y" << 1.5 << true
+            << QPoint(160, 120) << QPoint(60, 60) << QPoint(20, 20) << Qt::KeyboardModifiers(Qt::NoModifier) << true << true
+            << QPoint(0, 80) << 1.0 << 0;
+    QTest::newRow("horizontal wheel pixel delta to adjust x, amplified and reversed")
+            << Qt::Horizontal << false << -4 << "x" << 1.5 << false
+            << QPoint(160, 120) << QPoint(60, 60) << QPoint(20, 20) << Qt::KeyboardModifiers(Qt::NoModifier) << true << false
+            << QPoint(-80, 0) << 1.0 << 0;
+
+    // scale the item
+    QTest::newRow("vertical wheel angle delta to adjust scale")
+            << Qt::Vertical << false << 1 << "scale" << 1.5 << true
+            << QPoint(50, 32) << QPoint(360, 120) << QPoint() << Qt::KeyboardModifiers(Qt::NoModifier) << false << false
+            << QPoint(55, 44) << 1.5 << 0;
+    QTest::newRow("horizontal wheel angle delta to adjust scale, amplified and reversed, don't adjust position")
+            << Qt::Horizontal << false << -2 << "scale" << 1.5 << false
+            << QPoint(50, 32) << QPoint(-240, 360) << QPoint() << Qt::KeyboardModifiers(Qt::NoModifier) << false << false
+            << QPoint(0, 0) << 5.0625 << 0;
+
+    // rotate the item
+    QTest::newRow("vertical wheel angle delta to adjust rotation")
+            << Qt::Vertical << false << 1 << "rotation" << 1.5 << true
+            << QPoint(50, 32) << QPoint(360, -120) << QPoint() << Qt::KeyboardModifiers(Qt::NoModifier) << false << false
+            << QPoint(19, -31) << 1.0 << -15;
+    QTest::newRow("horizontal wheel angle delta to adjust rotation, amplified and reversed, don't adjust position")
+            << Qt::Horizontal << false << -2 << "rotation" << 1.5 << false
+            << QPoint(80, 80) << QPoint(240, 360) << QPoint() << Qt::KeyboardModifiers(Qt::NoModifier) << false << false
+            << QPoint(0, 0) << 1.0 << -60;
+}
+
+void tst_QQuickWheelHandler::singleHandler()
+{
+    // handler properties
+    QFETCH(Qt::Orientation, orientation);
+    QFETCH(bool, invertible);
+    QFETCH(int, rotationScale);
+    QFETCH(QString, property);
+    QFETCH(qreal, targetScaleMultiplier);
+    QFETCH(bool, targetTransformAroundCursor);
+    // event
+    QFETCH(QPoint, eventPos);
+    QFETCH(QPoint, eventAngleDelta);
+    QFETCH(QPoint, eventPixelDelta);
+    QFETCH(Qt::KeyboardModifiers, eventModifiers);
+    QFETCH(bool, eventPhases);
+    QFETCH(bool, eventInverted);
+    // result
+    QFETCH(QPoint, expectedPosition);
+    QFETCH(qreal, expectedScale);
+    QFETCH(int, expectedRotation);
+
+    QQuickView window;
+    QByteArray errorMessage;
+    QVERIFY2(QQuickTest::initView(window, testFileUrl("rectWheel.qml"), true, &errorMessage), errorMessage.constData());
+    window.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&window));
+
+    QQuickItem *rect = window.rootObject();
+    QVERIFY(rect != nullptr);
+    QQuickWheelHandler *handler = rect->findChild<QQuickWheelHandler*>();
+    QVERIFY(handler != nullptr);
+    handler->setOrientation(orientation);
+    handler->setInvertible(invertible);
+    handler->setRotationScale(rotationScale);
+    handler->setProperty(property);
+    handler->setTargetScaleMultiplier(targetScaleMultiplier);
+    handler->setTargetTransformAroundCursor(targetTransformAroundCursor);
+    QSignalSpy activeChangedSpy(handler, SIGNAL(activeChanged()));
+
+    if (eventPhases) {
+        sendWheelEvent(window, eventPos, QPoint(), QPoint(), eventModifiers, Qt::ScrollBegin, eventInverted);
+        sendWheelEvent(window, eventPos, eventAngleDelta, eventPixelDelta, eventModifiers, Qt::ScrollUpdate, eventInverted);
+    } else {
+        sendWheelEvent(window, eventPos, eventAngleDelta, eventPixelDelta, eventModifiers, Qt::NoScrollPhase, eventInverted);
+    }
+    QCOMPARE(rect->position().toPoint(), expectedPosition);
+    QCOMPARE(activeChangedSpy.count(), 1);
+    QCOMPARE(handler->active(), true);
+    QCOMPARE(rect->scale(), expectedScale);
+    QCOMPARE(rect->rotation(), expectedRotation);
+    if (!eventPhases) {
+        QTRY_COMPARE(handler->active(), false);
+        QCOMPARE(activeChangedSpy.count(), 2);
+    }
+
+    // restore by rotating backwards
+    if (eventPhases) {
+        sendWheelEvent(window, eventPos, eventAngleDelta * -1, eventPixelDelta * -1, eventModifiers, Qt::ScrollUpdate, eventInverted);
+        sendWheelEvent(window, eventPos, QPoint(), QPoint(), eventModifiers, Qt::ScrollEnd, eventInverted);
+    } else {
+        sendWheelEvent(window, eventPos, eventAngleDelta * -1, eventPixelDelta * -1, eventModifiers, Qt::NoScrollPhase, eventInverted);
+    }
+    QCOMPARE(activeChangedSpy.count(), eventPhases ? 2 : 3);
+    QCOMPARE(handler->active(), !eventPhases);
+    QCOMPARE(rect->position().toPoint(), QPoint(0, 0));
+    QCOMPARE(rect->scale(), 1);
+    QCOMPARE(rect->rotation(), 0);
+}
+
+void tst_QQuickWheelHandler::nestedHandler_data()
+{
+    // handler properties
+    QTest::addColumn<Qt::Orientation>("orientation");
+    QTest::addColumn<bool>("invertible");
+    QTest::addColumn<int>("rotationScale");
+    QTest::addColumn<QString>("property");
+    QTest::addColumn<qreal>("targetScaleMultiplier");
+    QTest::addColumn<bool>("targetTransformAroundCursor");
+    // event
+    QTest::addColumn<QPoint>("eventPos");
+    QTest::addColumn<QPoint>("eventAngleDelta");
+    QTest::addColumn<QPoint>("eventPixelDelta");
+    QTest::addColumn<Qt::KeyboardModifiers>("eventModifiers");
+    QTest::addColumn<bool>("eventPhases");
+    QTest::addColumn<bool>("eventInverted");
+    QTest::addColumn<int>("eventCount");
+    // result: inner handler
+    QTest::addColumn<QPoint>("innerPosition");
+    QTest::addColumn<qreal>("innerScale");
+    QTest::addColumn<int>("innerRotation");
+    // result: outer handler
+    QTest::addColumn<QPoint>("outerPosition");
+    QTest::addColumn<qreal>("outerScale");
+    QTest::addColumn<int>("outerRotation");
+
+    // move the item
+    QTest::newRow("vertical wheel angle delta to adjust x")
+            << Qt::Vertical << false << 1 << "x" << 1.5 << true
+            << QPoint(160, 120) << QPoint(120, 120) << QPoint() << Qt::KeyboardModifiers(Qt::NoModifier) << false << false << 10
+            << QPoint(175,60) << 1.0 << 0
+            << QPoint(75, 0) << 1.0 << 0;
+    QTest::newRow("horizontal wheel pixel delta to adjust y")
+            << Qt::Horizontal << false << 1 << "y" << 1.5 << false
+            << QPoint(160, 120) << QPoint(120, 120) << QPoint(50, 50) << Qt::KeyboardModifiers(Qt::NoModifier) << true << false << 4
+            << QPoint(100, 160) << 1.0 << 0
+            << QPoint(0, 100) << 1.0 << 0;
+}
+
+void tst_QQuickWheelHandler::nestedHandler()
+{
+    // handler properties
+    QFETCH(Qt::Orientation, orientation);
+    QFETCH(bool, invertible);
+    QFETCH(int, rotationScale);
+    QFETCH(QString, property);
+    QFETCH(qreal, targetScaleMultiplier);
+    QFETCH(bool, targetTransformAroundCursor);
+    // event
+    QFETCH(QPoint, eventPos);
+    QFETCH(QPoint, eventAngleDelta);
+    QFETCH(QPoint, eventPixelDelta);
+    QFETCH(Qt::KeyboardModifiers, eventModifiers);
+    QFETCH(bool, eventPhases);
+    QFETCH(bool, eventInverted);
+    QFETCH(int, eventCount);
+    // result: inner handler
+    QFETCH(QPoint, innerPosition);
+    QFETCH(qreal, innerScale);
+    QFETCH(int, innerRotation);
+    // result: outer handler
+    QFETCH(QPoint, outerPosition);
+    QFETCH(qreal, outerScale);
+    QFETCH(int, outerRotation);
+
+    QQuickView window;
+    QByteArray errorMessage;
+    QVERIFY2(QQuickTest::initView(window, testFileUrl("nested.qml"), true, &errorMessage), errorMessage.constData());
+    window.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&window));
+
+    QQuickItem *outerRect = window.rootObject();
+    QVERIFY(outerRect != nullptr);
+    QQuickWheelHandler *outerHandler = outerRect->findChild<QQuickWheelHandler*>("outerWheelHandler");
+    QVERIFY(outerHandler != nullptr);
+    QQuickWheelHandler *innerHandler = outerRect->findChild<QQuickWheelHandler*>("innerWheelHandler");
+    QVERIFY(innerHandler != nullptr);
+    QQuickItem *innerRect = innerHandler->parentItem();
+    QVERIFY(innerRect != nullptr);
+    innerHandler->setOrientation(orientation);
+    innerHandler->setInvertible(invertible);
+    innerHandler->setRotationScale(rotationScale);
+    innerHandler->setProperty(property);
+    innerHandler->setTargetScaleMultiplier(targetScaleMultiplier);
+    innerHandler->setTargetTransformAroundCursor(targetTransformAroundCursor);
+    outerHandler->setOrientation(orientation);
+    outerHandler->setInvertible(invertible);
+    outerHandler->setRotationScale(rotationScale);
+    outerHandler->setProperty(property);
+    outerHandler->setTargetScaleMultiplier(targetScaleMultiplier);
+    outerHandler->setTargetTransformAroundCursor(targetTransformAroundCursor);
+    QSignalSpy innerActiveChangedSpy(innerHandler, SIGNAL(activeChanged()));
+    QSignalSpy outerActiveChangedSpy(outerHandler, SIGNAL(activeChanged()));
+
+    if (eventPhases)
+        sendWheelEvent(window, eventPos, QPoint(), QPoint(), eventModifiers, Qt::ScrollBegin, eventInverted);
+    for (int i = 0; i < eventCount; ++i)
+        sendWheelEvent(window, eventPos, eventAngleDelta, eventPixelDelta, eventModifiers,
+                       (eventPhases ? Qt::ScrollUpdate : Qt::NoScrollPhase), eventInverted);
+    QCOMPARE(innerRect->position().toPoint(), innerPosition);
+
+    /*
+        If outer is activated, maybe inner should be deactivated? But the event
+        doesn't get delivered to inner anymore, so it doesn't find out that
+        it's no longer getting events. It will get deactivated after the
+        timeout, just as if the user stopped scrolling.
+
+        This situation is similar to QTBUG-50199, but it's questionable whether
+        that was really so important. So far in Qt Quick, if you move the mouse
+        while wheel momentum continues, or if the item moves out from under the
+        mouse, a different item starts getting the events immediately. In
+        non-Qt applications on most OSes, that's quite normal.
+    */
+    // QCOMPARE(innerActiveChangedSpy.count(), 2);
+    // QCOMPARE(innerHandler->active(), false);
+    QCOMPARE(innerRect->scale(), innerScale);
+    QCOMPARE(innerRect->rotation(), innerRotation);
+    QCOMPARE(outerRect->position().toPoint(), outerPosition);
+    QCOMPARE(outerActiveChangedSpy.count(), 1);
+    QCOMPARE(outerHandler->active(), true);
+    QCOMPARE(outerRect->scale(), outerScale);
+    QCOMPARE(outerRect->rotation(), outerRotation);
+    if (!eventPhases) {
+        QTRY_COMPARE(outerHandler->active(), false);
+        QCOMPARE(outerActiveChangedSpy.count(), 2);
+    }
+}
+
+QTEST_MAIN(tst_QQuickWheelHandler)
+
+#include "tst_qquickwheelhandler.moc"