QApplicationPrivate::translateTouchToMouse always sets
buttons() to Qt::LeftButton for synthesised events. This is wrong
for a mouse release, since 'button' should in that case be
Qt::LeftButton, and 'buttons' should be Qt::NoButton (since no buttons
are actually being pressed).
This caused problems for QGraphicsView, which refuses to
release any mouse grab set on a QGraphicsItem if at least one
button is being pressed (which was always true).
This resulted in broken drag behavior on touch platforms.
Change-Id: Iefe63cd753f9f8bb04278fd04a4d728e3deda25e
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
0d308c4111