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Qt Quick Ultralite Automotive Cluster 示例

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import QtQuick 2.15 import Automotive 1.0 Item { id: root; opacity: 0; visible: opacity != 0 property bool selected: false; Connections { target: NormalModeModel function onMenuChanged(menu: int) { selected = false } } Component.onCompleted: selected = true states: [ State { name: "hidden"; when: !selected; }, State { name: "visible"; when: selected; PropertyChanges { target: root; opacity: 1.; } } ] transitions: [ Transition { from: "hidden"; to: "visible"; SequentialAnimation { PropertyAnimation { duration: 250; property: "opacity"; } } }, Transition { from: "visible"; to: "hidden"; PropertyAnimation { duration: 250; property: "opacity"; } } ] }