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, 3 insertions, 0 deletions

diff --git a/src/plugins/platforms/windows/qwindowscontext.h b/src/plugins/platforms/windows/qwindowscontext.h
index 7c88ee14ba..870a42946d 100644
--- a/src/plugins/platforms/windows/qwindowscontext.h
+++ b/src/plugins/platforms/windows/qwindowscontext.h
@@ -67,6 +67,7 @@ struct QWindowCreationContext;
 struct QWindowsContextPrivate;
 class QPoint;
 class QKeyEvent;
+class QTouchDevice;
 
 #ifndef Q_OS_WINCE
 struct QWindowsUser32DLL
@@ -219,6 +220,8 @@ public:
     bool asyncExpose() const;
     void setAsyncExpose(bool value);
 
+    QTouchDevice *touchDevice() const;
+
 private:
     void handleFocusEvent(QtWindows::WindowsEventType et, QWindowsWindow *w);
 #ifndef QT_NO_CONTEXTMENU