add QQuickWindowPrivate::removeGrabber()

The goal is to eventually avoid accessing QQuickWindowPrivate's own
variables inside QQuickItemPrivate, and to use itemForTouchPointId
instead of mouseGrabberItem.

PinchArea relies on some strange behavior: when one touch point is
released, it ungrabs the mouse, but keeps the touch point grab.
This seems somewhat inconsistent, but for now we keep one place
(QQuickItem::ungrabMouse) that does the mouse ungrab only.

Change-Id: I46389475da2ecb157508e092f9f3f0cf923881e3
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@qt.io>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/quick/items/qquickwindow_p.h b/src/quick/items/qquickwindow_p.h
index 1ab2617f0a..ac430f3e0c 100644
--- a/src/quick/items/qquickwindow_p.h
+++ b/src/quick/items/qquickwindow_p.h
@@ -143,6 +143,7 @@ public:
     bool translateTouchToMouse(QQuickItem *item, QTouchEvent *event);
     void translateTouchEvent(QTouchEvent *touchEvent);
     void setMouseGrabber(QQuickItem *grabber);
+    void removeGrabber(QQuickItem *grabber);
     static void transformTouchPoints(QList<QTouchEvent::TouchPoint> &touchPoints, const QTransform &transform);
     static QMouseEvent *cloneMouseEvent(QMouseEvent *event, QPointF *transformedLocalPos = 0);
     bool deliverInitialMousePressEvent(QQuickItem *, QMouseEvent *);