QtQuick2 - 选择/单击根项目外部/内部时，QML可重用项目焦点更改

当我单击或选择组件主体外的另一个项目来调用任何事件（突出显示文本，显示/隐藏矩形等）时，如何将焦点更改状态实现为可重用的QML组件 . 有一些代码我试图在项目具有焦点时在CheckBox文本下实现高亮线，并在焦点丢失时隐藏它 . 请帮助我了解更有效的实施方法 . 这是元素的来源：

BreezeQuickCheckbox.qml

import QtQuick 2.4

Item {
    id: root
    property BreezeQuickPalette palette: BreezeQuickPalette
    property bool checked: false
    property string caption: "Checkbox"
    property int fontSize: 18
    implicitHeight: 48
    implicitWidth: bodyText.width + 48
    Rectangle{
        id: body
        width: 32
        height: 32
        anchors {
            verticalCenter: parent.verticalCenter
            left: parent.left
            leftMargin: 8
            rightMargin: 8
        }
        radius: 2
        border{
            width: 1
            color: palette.iconGrey
        }
        color: "transparent"
    }
    Rectangle{
        id: check
        opacity: 1
        radius: 1
        color: palette.focusColor
        anchors {
            verticalCenter: body.verticalCenter
        }
        anchors.fill: body
        anchors.margins: 4
        transform: Rotation {
            id: checkRotation
            origin.x: check.width/2
            origin.y: check.height/2
            axis {
                x: 1
                y: 1
                z: 0
            }
            angle: 90
            Behavior on angle {
                NumberAnimation {
                    duration: 150
                    easing.type: Easing.InOutQuad
                }
            }
        }
        smooth: true
    }
    Text {
        id: bodyText
        anchors {
            verticalCenter: parent.verticalCenter
            left: body.right
        }
        color: palette.normalText
        text: caption
        anchors.leftMargin: 8
        font.pointSize: fontSize
        verticalAlignment: Text.AlignVCenter
        horizontalAlignment: Text.AlignHCenter
    }
    Rectangle {
        id: highlightLine
        anchors{
            horizontalCenter: bodyText.horizontalCenter
            top: bodyText.bottom
            topMargin: -2
        }
        width: bodyText.width
        height: 2
        color: palette.focusColor
    }
    MouseArea{
        id: bodyArea
        anchors.fill: parent
        hoverEnabled: true
        onEntered: {
            if (checked == false){
                body.border.color = palette.focusColor
            } else if (checked == true){
                body.border.color = palette.lightPlasmaBlue
                check.color = palette.lightPlasmaBlue
            }
        }
        onExited: {
            if (checked == false){
                body.border.color = palette.iconGrey
            }
            if (checked == true){
                body.border.color = palette.focusColor
                check.color = palette.focusColor
            }
        }
        onClicked: {
            if (checked == false){
                checked = true
                body.border.color = palette.lightPlasmaBlue
                checkRotation.angle = 0
            } else if (checked == true){
                checked = false
                body.border.color = palette.focusColor
                checkRotation.angle = 90
            }
        }
    }
    onCheckedChanged: {
        if (checked == true){
            body.border.color = palette.focusColor
            if (bodyArea.containsMouse) {
                check.color = palette.lightPlasmaBlue
                checkRotation.angle = 0
            } else if (!bodyArea.containsMouse){
                check.color = palette.focusColor
                checkRotation.angle = 0
            }
        } else if (checked == false){
            body.border.color = palette.iconGrey
            checkRotation.angle = 90
        }
    }
}

您可以在此片段中看到声明实际行的位置：

Rectangle {
        id: highlightLine
        anchors{
            horizontalCenter: bodyText.horizontalCenter
            top: bodyText.bottom
            topMargin: -2
        }
        width: bodyText.width
        height: 2
        color: palette.focusColor
    }

这是调色板代码，如果你对它感兴趣 - 它是组件的子集，它有自己的调色板：

BreezeQuickPalette.qml

import QtQuick 2.4

QtObject {
    id: palette
    property string theme: "light"


    readonly property color normalText: if (theme == "light"){
                                      charcoalGrey
                                  } else if (theme == "dark"){
                                      cardboardGrey
                                  }
    readonly property color inactiveText: asphalt
    readonly property color activeText: plasmaBlue
    readonly property color linkText: seaBlue
    readonly property color negativeText: iconRed
    readonly property color neutralText: bewareOrange
    readonly property color positiveText: deepGreen
    readonly property color focusColor: plasmaBlue
    readonly property color hoverColor: plasmaBlue
    readonly property color normalBackground: if (theme == "light"){
                                      cardboardGrey
                                  } else if (theme == "dark"){
                                                  charcoalGrey
                                              }

    readonly property color alternateBackground: if (theme == "light"){
                                      steel
                                  } else if (theme == "dark"){
                                                     shadeBlack
                                                 }

    readonly property color paperWhite: "#fcfcfc"
    readonly property color cardboardGrey: "#eff0f1"
    readonly property color iconGrey: "#4d4d4d"
    readonly property color charcoalGrey: "#31363b"
    readonly property color shadeBlack: "#232629"
    readonly property color plasmaBlue: "#3daee9"
    readonly property color iconRed: "#da4453"
    readonly property color dangerRed: "#ed1515"
    readonly property color iconOrange: "#f47750"
    readonly property color bewareOrange: "#f67400"
    readonly property color iconYellow: "#fdbc4b"
    readonly property color sunbeamYellow: "#c9ce3b"
    readonly property color mellowTurquoise: "#1cdc9a"
    readonly property color iconGreen: "#2ecc71"
    readonly property color verdantGreen: "#11d116"
    readonly property color iconBlue: "#1d99f3"
    readonly property color seaBlue: "#2980b9"
    readonly property color skyBlue: "#3498db"
    readonly property color turquoise: "#1abc9c"
    readonly property color deepGreen: "#27ae60"
    readonly property color deepTurquoise: "#16a085"
    readonly property color peach: "#e74c3f"
    readonly property color lightMaroon: "#c0392b"
    readonly property color deepYellow: "#f39c1f"
    readonly property color purple: "#9b59b6"
    readonly property color deepPurple: "#8e44ad"
    readonly property color steelBlue: "#34495e"
    readonly property color charcoal: "#2c3e50"
    readonly property color asphalt: "#7f8c8d"
    readonly property color steel: "#bdc3c7"
    readonly property color grey: "#95a5a6"
    readonly property color lightPlasmaBlue: "#63beed"
}

请帮助我理解一旦我点击或选择根项目之外/之内的内容，我怎样才能使这个 Rectangle 可见或隐藏 . 这是我在重用时可以看到的东西 CheckBox ，当焦点消失并传递给另一个组件甚至在元素外部点击时隐藏下划线 .