拖放不能按预期工作

Question

我在场景中有2个相同的Item个。每个都可以拖动，也可以接受与其他拖动对象的交互。为了避免与自身的交互，我在适当的拖动函数中设置drop.accept = false。当我拖动rect1而不是rect2时，它可以正常工作。 rect2响应进入和退出事件。但是，如果之后我尝试将rect2移到rect1上，则拖动机制停止工作并且根本不会调用拖动事件，即使我再次移动rect1超过rect2。

我的目标是在每次拖动时知道拖动的对象以及移动的对象。

import QtQuick 2.4
import QtQuick.Window 2.0

Window {
    id: win
    width: 800
    height: 600

    Rectangle {
        id:  rect1
        objectName: "rect1"
        width: 100
        height: 100
        x: 200
        y: 200
        color: "orange"
        property bool hold: false
        z: hold ? 2 : 1
        Text {
            anchors.centerIn: parent
            text: "rect1"
        }
        MouseArea {
            id: area1
            anchors.fill: parent
            drag.target: rect1.hold ? rect1 : undefined
            onPressed: rect1.hold = true;
            onReleased: rect1.hold = false;
        }
        DropArea {
            anchors.fill: parent
            onEntered: {
                if(drag.source == rect1) {
                    drag.accepted = false;
                }
                else{
                    drag.accepted = true;
                    console.log("rect1: entered");
                }
            }
            onExited: {
                if(drag.source == rect1) {
                    drag.accepted = false;
                }
                else {
                    drag.accepted = true;
                    console.log("rect1: exited");
                }
            }
        }
        Drag.active: rect1.hold
        Drag.source: rect1.hold ? rect1 : undefined
        Drag.hotSpot: Qt.point(width/2,height/2)
    }

    Rectangle {
        id:  rect2
        objectName: "rect2"
        width: 100
        height: 100
        x: 500
        y: 300
        color: "lightblue"
        property bool hold: false
        z: hold ? 2 : 1
        Text {
            anchors.centerIn: parent
            text: "rect2"
        }
        MouseArea {
            id: area2
            anchors.fill: parent
            drag.target: rect2.hold ? rect2 : undefined
            onPressed: rect2.hold = true;
            onReleased: rect2.hold = false;
        }
        DropArea {
            anchors.fill: parent
            onEntered: {
                if(drag.source == rect2) {
                    drag.accepted = false;
                }
                else {
                    drag.accepted = true;
                    console.log("rect2: entered");
                }
            }
            onExited: {
                if(drag.source == rect2) {
                    drag.accepted = false;
                }
                else {
                    drag.accepted = true;
                    console.log("rect2: exited");
                }
            }
        }

        Drag.active: rect2.hold
        Drag.source: rect2.hold ? rect2 : undefined
        Drag.hotSpot: Qt.point(width/2,height/2)
    }
}