eventPoint QML Type

相当于QEventPoint 的 Qml。更多

Import Statement: import QtQuick
In C++: QEventPoint

详细说明

eventPoint 是QEventPoint 的 Qml 值类型表示。它与QEventPoint 具有相同的属性。

可使用以下属性:

状态支持以下值:

常量描述
EventPoint.Unknown未知状态;与 Qt.TouchPointUnknownState 相同
EventPoint.Stationary事件点未移动;与 Qt.TouchPointStationary 相同
EventPoint.Pressed触摸点或按钮被按下;同 Qt.TouchPointPressed
EventPoint.Updated事件点被更新;同 Qt.TouchPointMoved
EventPoint.Released触摸点或按钮被释放;同 Qt.TouchPointReleased

States 类型是QFlags<State> 的类型定义。它存储状态值的 OR 组合。另请参见QEventPoint::States

TapHandler {
    gesturePolicy: TapHandler.ReleaseWithinBounds // exclusive grab on press
    onGrabChanged:
        (transition, eventPoint) => {
            switch (transition) {
                case PointerDevice.GrabExclusive:
                    console.log("took exclusive grab of point", eventPoint.id,
                                "on", eventPoint.device.name)
                    break
                case PointerDevice.UngrabExclusive:
                    console.log("gave up exclusive grab of point", eventPoint.id,
                                "on", eventPoint.device.name)
                    break
                case PointerDevice.CancelGrabExclusive:
                    console.log("exclusive grab of point", eventPoint.id,
                                "on", eventPoint.device.name, "has been cancelled")
                    break
            }

            switch (eventPoint.state) {
                case EventPoint.Pressed:
                    console.log("on press @", eventPoint.position);
                    break
                case EventPoint.Updated:
                    console.log("on update @", eventPoint.position);
                    break
                case EventPoint.Released:
                    console.log("on release @", eventPoint.position);
                    break
                default:
                    console.log(eventPoint.position, "state", eventPoint.state)
                    break
            }
        }
}

另请参见 handlerPoint

© 2025 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.