Pointer Handlers that manipulate target item properties should now use QQuickDragAxis consistently to: - enforce minimum and maximum values - hold the persistent and active values - make those available via properties - emit a new activeValueChanged(delta) signal when the value changes, so that it's possible to incrementally update a target item property in JS (onValueDelta: target.property += delta) In the pinchHandler.qml example, you can use the PinchHandler to adjust 4 properties of one Rectangle independently (it requires coordination). m_boundedActiveValue controls whether m_activeValue will be kept between minimum and maximum. For rotation, tst_QQuickPinchHandler::scaleNativeGesture() expects it to be, although that seems questionable now, and may be addressed later. [ChangeLog][QtQuick][Event Handlers] PinchHandler now has scaleAxis and rotationAxis grouped properties, alongside the existing xAxis and yAxis; and all of these now have activeValue and persistentValue properties. The activeValueChanged signal includes a delta value, giving the incremental change since the previous activeValue. The persistentValue is settable, in case some target item property can be adjusted in multiple ways: the handler's stored value can then be synced up with the item property value after each external change. These features are also added to DragHandler's xAxis and yAxis properties. Task-number: QTBUG-68108 Task-number: QTBUG-76380 Task-number: QTBUG-76379 Task-number: QTBUG-94168 Change-Id: I78a5b43e9ba580448ef05054b6c4bc71b1834dd6 Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>