如何传播MouseEvent，例如onEntered / onExited？

Question

根据Qt documentation on MouseArea，只有＆＃39;组成＆＃39; clicked等事件可以传播到z顺序较低的项目。

如何为简单的鼠标事件（例如onEntered或onExited）复制相同的行为？

e.g。我有两个矩形，都有一个MouseArea，上面的矩形覆盖下方矩形的右下角。如果我点击任一矩形的任何地方，包括重叠区域，两个矩形＆＃39; MouseAreas将收到onClicked信号，因为我已使用propagateComposedEvents: true并在upperRect的处理程序中设置mouse.accepted = false。但是onEntered仅适用于lowerRect的非重叠部分。

Rectangle {
    id: lowerRect
    x: 0
    y: 0
    width: 100
    height: 100
    color: "blue"

    MouseArea {
        anchors.fill: parent
        onClicked: console.log("lowerRect was clicked")
        hoverEnabled: true
        onEntered: console.log("lowerRect was entered")
    }
}

Rectangle {
    id: upperRect
    x: 50
    y: 50
    width: 50
    height: 50
    color: "green"
    opacity: 0.8

    MouseArea {
        anchors.fill: parent
        propagateComposedEvents: true
        onClicked: {
            mouse.accepted = false
            console.log("upperRect was clicked")
        }
        hoverEnabled: true
        onEntered: console.log("upperRect was entered")
    }
}

Answer 1

您可以手动呼叫信号。类似于myMouseArea.entered()或myMouseArea.exited()（其中myMouseArea是id或对MouseArea对象的引用）的方法可行。