Decide whether to synthesize mouse events on a per device basis

Currently Qt uses the QPlatformIntegration::StyleHint
SynthesizeMouseFromTouchEvents to check whether to synthesize mouse
events from touch events. But not only platform plugins can produce
touch events, they can be created by e.g. QTest::touchEvent() and in
this case we almost definitely need synthesizing regardless of the
platform.

This commit introduces a QTouchDevice::MouseEmulation capability which
replaces use of the QPlatformIntegration::SynthesizeMouseFromTouchEvents.
So it's possible to pass QTouchDevice without this capability to
QTest::touchEvent() and be sure that mouse events will be synthesized.
Notice that touch pads always emulate mouse events.
As a result we can activate some tests which were disabled for specific
platform configurations by commits 6c1670d8c273819435867c42725c0db0eee597dc
and e9760f1559361c39f269fb89f1ebd01f6ee8378d.

Change-Id: Idc82fa4007a095fc1cb5934979361b0023d2b793
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>

1 files changed, 30 insertions, 4 deletions

diff --git a/tests/auto/gui/kernel/qwindow/tst_qwindow.cpp b/tests/auto/gui/kernel/qwindow/tst_qwindow.cpp
index 89490525c9..8ce0e3942e 100644
--- a/tests/auto/gui/kernel/qwindow/tst_qwindow.cpp
+++ b/tests/auto/gui/kernel/qwindow/tst_qwindow.cpp
@@ -68,6 +68,7 @@ private slots:
     void isActive();
     void testInputEvents();
     void touchToMouseTranslation();
+    void touchToMouseTranslationForDevices();
     void mouseToTouchTranslation();
     void mouseToTouchLoop();
     void touchCancel();
@@ -705,8 +706,6 @@ void tst_QWindow::testInputEvents()
 
 void tst_QWindow::touchToMouseTranslation()
 {
-    if (!QGuiApplicationPrivate::platformIntegration()->styleHint(QPlatformIntegration::SynthesizeMouseFromTouchEvents).toBool())
-        QSKIP("Mouse events are synthesized by the system on this platform.");
     InputTestWindow window;
     window.ignoreTouch = true;
     window.setGeometry(QRect(m_availableTopLeft + QPoint(80, 80), m_testWindowSize));
@@ -779,6 +778,35 @@ void tst_QWindow::touchToMouseTranslation()
     QTRY_COMPARE(window.mouseReleaseButton, 0);
 }
 
+void tst_QWindow::touchToMouseTranslationForDevices()
+{
+    InputTestWindow window;
+    window.ignoreTouch = true;
+    window.setGeometry(QRect(m_availableTopLeft + QPoint(80, 80), m_testWindowSize));
+    window.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&window));
+
+    QPoint touchPoint(10, 10);
+
+    QTest::touchEvent(&window, touchDevice).press(0, touchPoint, &window);
+    QTest::touchEvent(&window, touchDevice).release(0, touchPoint, &window);
+    QCoreApplication::processEvents();
+
+    QCOMPARE(window.mousePressedCount, 1);
+    QCOMPARE(window.mouseReleasedCount, 1);
+
+    window.resetCounters();
+
+    touchDevice->setCapabilities(touchDevice->capabilities() | QTouchDevice::MouseEmulation);
+    QTest::touchEvent(&window, touchDevice).press(0, touchPoint, &window);
+    QTest::touchEvent(&window, touchDevice).release(0, touchPoint, &window);
+    QCoreApplication::processEvents();
+    touchDevice->setCapabilities(touchDevice->capabilities() & ~QTouchDevice::MouseEmulation);
+
+    QCOMPARE(window.mousePressedCount, 0);
+    QCOMPARE(window.mouseReleasedCount, 0);
+}
+
 void tst_QWindow::mouseToTouchTranslation()
 {
     qApp->setAttribute(Qt::AA_SynthesizeTouchForUnhandledMouseEvents, true);
@@ -907,8 +935,6 @@ void tst_QWindow::touchCancel()
 
 void tst_QWindow::touchCancelWithTouchToMouse()
 {
-    if (!QGuiApplicationPrivate::platformIntegration()->styleHint(QPlatformIntegration::SynthesizeMouseFromTouchEvents).toBool())
-        QSKIP("Mouse events are synthesized by the system on this platform.");
     InputTestWindow window;
     window.ignoreTouch = true;
     window.setGeometry(QRect(m_availableTopLeft + QPoint(80, 80), m_testWindowSize));