Clear only one device from g_pointIdMap when all points released

The new test tst_QTouchEvent::touchOnMultipleTouchscreens()
needs the touchpoint IDs to be predictable, but another test currently
has a QEXPECT_FAIL; without release events, g_pointIdMap continued to
hold the touchpoints that were there when the test failed.  So it's
necessary to add QWindowSystemInterfacePrivate::clearPointIdMap()
to be able to call it in the test cleanup function.

Fixes: QTBUG-73830
Change-Id: Ia6a70d028be95cd2b6676db6363ec408c0b116bc
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/gui/kernel/qwindowsysteminterface_p.h b/src/gui/kernel/qwindowsysteminterface_p.h
index 9cb4e191cc..cea02fb8b7 100644
--- a/src/gui/kernel/qwindowsysteminterface_p.h
+++ b/src/gui/kernel/qwindowsysteminterface_p.h
@@ -537,6 +537,7 @@ public:
     static QList<QWindowSystemInterface::TouchPoint>
         toNativeTouchPoints(const QList<QTouchEvent::TouchPoint>& pointList,
                             const QWindow *window);
+    static void clearPointIdMap();
 
     static void installWindowSystemEventHandler(QWindowSystemEventHandler *handler);
     static void removeWindowSystemEventhandler(QWindowSystemEventHandler *handler);