Smooth repaint
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Hi!
I have elemens hierarchy like this:RootItem.qml
@
import QtQuick 2.0Flickable { id: flickable anchors.fill: parent contentHeight: content.height contentWidth: content.width visibleArea.onYPositionChanged: item2.internalY = flickable.mapToItem( item2, 0, 20 ).y Item { id: content height: 800 width: 300 Column { anchors.fill: parent Level2 { id: item2 anchors { left: parent.left; right: parent.right } } } } }
@
Level2.qml
@
import QtQuick 2.0Rectangle {
height: 800property int internalY: 0 Level3 { anchors.fill: parent internalY: parent.internalY + 5 }
}
@Level3.qml
@
import QtQuick 2.0Item {
property int internalY: 0Rectangle { id: internal height: 20 width: 20 anchors { right: parent.right } y: internalY + 5 }
}
@Objective - positioning "internal" element relative to "flickable". In the example above all works fine. But in real project (with a large number of elements) on scrolling the "internal" element doesn't move smoothly. I think this is because the values of properties are set through the event queue. If change all property ("internalY") to alias it is solve the problem. But moving all logic in root element - it's bad idea. Is there another solution?