qt-everywhere-src-5.14.1/qtdeclarative/tests/auto/quick/pointerhandlers/mousearea_interop/tst_mousearea_interop.cpp

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#include <QtTest/QtTest>

#include <QtQml/qqmlengine.h>
#include <QtQml/qqmlproperty.h>
#include <QtQuick/private/qquickdraghandler_p.h>
#include <QtQuick/private/qquickmousearea_p.h>
#include <QtQuick/qquickitem.h>
#include <QtQuick/qquickview.h>

#include "../../../shared/util.h"
#include "../../shared/viewtestutil.h"

Q_LOGGING_CATEGORY(lcPointerTests, "qt.quick.pointer.tests")

class tst_MouseAreaInterop : public QQmlDataTest
{
    Q_OBJECT
public:
    tst_MouseAreaInterop()
      : touchDevice(QTest::createTouchDevice())
      , touchPointerDevice(QQuickPointerDevice::touchDevice(touchDevice))
    {}

private slots:
    void dragHandlerInSiblingStealingGrabFromMouseAreaViaMouse();
    void dragHandlerInSiblingStealingGrabFromMouseAreaViaTouch_data();
    void dragHandlerInSiblingStealingGrabFromMouseAreaViaTouch();

private:
    void createView(QScopedPointer<QQuickView> &window, const char *fileName);
    QTouchDevice *touchDevice;
    QQuickPointerDevice *touchPointerDevice;
};

void tst_MouseAreaInterop::createView(QScopedPointer<QQuickView> &window, const char *fileName)
{
    window.reset(new QQuickView);
    window->setSource(testFileUrl(fileName));
    QTRY_COMPARE(window->status(), QQuickView::Ready);
    QQuickViewTestUtil::centerOnScreen(window.data());
    QQuickViewTestUtil::moveMouseAway(window.data());

    window->show();
    QVERIFY(QTest::qWaitForWindowActive(window.data()));
    QVERIFY(window->rootObject() != nullptr);
}

void tst_MouseAreaInterop::dragHandlerInSiblingStealingGrabFromMouseAreaViaMouse()
{
    const int dragThreshold = QGuiApplication::styleHints()->startDragDistance();
    QScopedPointer<QQuickView> windowPtr;
    createView(windowPtr, "dragTakeOverFromSibling.qml");
    QQuickView * window = windowPtr.data();
    auto pointerEvent = QQuickWindowPrivate::get(window)->pointerEventInstance(QQuickPointerDevice::genericMouseDevice());

    QPointer<QQuickPointerHandler> handler = window->rootObject()->findChild<QQuickPointerHandler*>();
    QVERIFY(handler);
    QQuickMouseArea *ma = window->rootObject()->findChild<QQuickMouseArea*>();
    QVERIFY(ma);

    QPoint p1(150, 150);
    QTest::mousePress(window, Qt::LeftButton, Qt::NoModifier, p1);
    QCOMPARE(window->mouseGrabberItem(), ma);
    QCOMPARE(ma->pressed(), true);

    // Start dragging
    // DragHandler keeps monitoring, due to its passive grab,
    // and eventually steals the exclusive grab from MA
    int dragStoleGrab = 0;
    for (int i = 0; i < 4; ++i) {
        p1 += QPoint(dragThreshold / 2, 0);
        QTest::mouseMove(window, p1);
        if (!dragStoleGrab && pointerEvent->point(0)->exclusiveGrabber() == handler)
            dragStoleGrab = i;
    }
    if (dragStoleGrab)
        qCDebug(lcPointerTests, "DragHandler stole the grab after %d events", dragStoleGrab);
    QVERIFY(dragStoleGrab > 1);
    QCOMPARE(handler->active(), true);
    QCOMPARE(ma->pressed(), false);

    QTest::mouseRelease(window, Qt::LeftButton, Qt::NoModifier, p1);
    QCOMPARE(handler->active(), false);
}

void tst_MouseAreaInterop::dragHandlerInSiblingStealingGrabFromMouseAreaViaTouch_data()
{
    QTest::addColumn<bool>("preventStealing");

    QTest::newRow("allow stealing") << false;
    QTest::newRow("prevent stealing") << true;
}

void tst_MouseAreaInterop::dragHandlerInSiblingStealingGrabFromMouseAreaViaTouch() // QTBUG-77624 and QTBUG-79163
{
    QFETCH(bool, preventStealing);

    const int dragThreshold = QGuiApplication::styleHints()->startDragDistance();
    QScopedPointer<QQuickView> windowPtr;
    createView(windowPtr, "dragTakeOverFromSibling.qml");
    QQuickView * window = windowPtr.data();
    auto pointerEvent = QQuickWindowPrivate::get(window)->pointerEventInstance(touchPointerDevice);

    QPointer<QQuickPointerHandler> handler = window->rootObject()->findChild<QQuickPointerHandler*>();
    QVERIFY(handler);
    QQuickMouseArea *ma = window->rootObject()->findChild<QQuickMouseArea*>();
    QVERIFY(ma);
    ma->setPreventStealing(preventStealing);

    QPoint p1(150, 150);
    QTest::QTouchEventSequence touch = QTest::touchEvent(window, touchDevice);

    touch.press(1, p1).commit();
    QQuickTouchUtils::flush(window);
    QTRY_VERIFY(pointerEvent->point(0)->passiveGrabbers().contains(handler));
    QCOMPARE(pointerEvent->point(0)->grabberItem(), ma);
    QCOMPARE(window->mouseGrabberItem(), ma);
    QCOMPARE(ma->pressed(), true);

    // Start dragging
    // DragHandler keeps monitoring, due to its passive grab,
    // and eventually steals the exclusive grab from MA if MA allows it
    int dragStoleGrab = 0;
    for (int i = 0; i < 4; ++i) {
        p1 += QPoint(dragThreshold / 2, 0);
        touch.move(1, p1).commit();
        QQuickTouchUtils::flush(window);
        if (!dragStoleGrab && pointerEvent->point(0)->exclusiveGrabber() == handler)
            dragStoleGrab = i;
    }
    if (dragStoleGrab)
        qCDebug(lcPointerTests, "DragHandler stole the grab after %d events", dragStoleGrab);
    if (preventStealing) {
        QCOMPARE(dragStoleGrab, 0);
        QCOMPARE(handler->active(), false);
        QCOMPARE(ma->pressed(), true);
    } else {
        QVERIFY(dragStoleGrab > 1);
        QCOMPARE(handler->active(), true);
        QCOMPARE(ma->pressed(), false);
    }

    touch.release(1, p1).commit();
    QQuickTouchUtils::flush(window);
    QCOMPARE(handler->active(), false);
}

QTEST_MAIN(tst_MouseAreaInterop)

#include "tst_mousearea_interop.moc"