QML在做一个可移动的Rectangle的示例

import QtQuick 2.4

import QtQuick.Window 2.2

Window {

    id:mainRoot

    visible: true

    flags: Qt.FramelessWindowHint

    property real mouseXTMP: 0

    property real mouseYTMP: 0

    MouseArea {

        anchors.fill: parent

        onPressed: {

            mouseXTMP = mouseX

            mouseYTMP = mouseY

        }

        onPositionChanged: {

            mainRoot.x = mouseX + mainRoot.x - mouseXTMP

            mainRoot.y = mouseY + mainRoot.y - mouseYTMP

        }

    }

    Rectangle {

        anchors.fill: parent

        color:"red"

        Text {

            anchors.centerIn: parent

            text: qsTr("Click me move.")

        }

    }

}