Reject a Drag in a DragArea

lawrence.emke

I have been trying to learn about Drag and Drop facilities.
I started with the given example with the red and green Rectangle
in which the visible property of the green rectangle is made visible
when the red box enters it drop area.

I noticed that I could drop the red box in any area of the window, not just
in the dropArea! Now to learn more I would like to know how to reject
a "drop". And to have a drop rejected for any area other than the dropArea.
What I would like to see is that the dropped red box return to its original
position if the drop is reject. Is this possible.

I found some code on StackOverflow but it must be too old and causes
an error when I try to use it.

ODБOï

@lawrence-emke hi
please see the Qt Quick Examples - Drag and Drop

lawrence.emke

This post is deleted!

ODБOï

@lawrence-emke
i did simplified version of that example,

ApplicationWindow{

    width: 500
    height: 500
    visible: true

    Item {
        id: root
        width: 64; height: 64
        MouseArea {
            id: mouseArea
            anchors.fill: parent
            drag.target: tile
            onReleased: parent = tile.Drag.target !== null ? tile.Drag.target : root
            Rectangle {
                id: tile
                width: 64; height: 64
                anchors.verticalCenter: parent.verticalCenter
                anchors.horizontalCenter: parent.horizontalCenter
                color: "red"
                Drag.active: mouseArea.drag.active
                states: State {
                    when: mouseArea.drag.active
                    ParentChange { target: tile; parent: root }
                    AnchorChanges { target: tile; anchors.verticalCenter: undefined; anchors.horizontalCenter: undefined }
                }
            }
        }
    }


    DropArea {
        id: dragTarget
        width: 64; height: 64
        anchors.centerIn: parent
        Rectangle {
            id: dropRectangle
            color: "transparent"
            anchors.fill: parent
            border.width: 2
            border.color: dragTarget.containsDrag ? "grey" : "black"
        }
    }

}