event dispatch of QQuickItem

[amyhaber]

Hi, buddies
I use QQuickPaintedItem as base class to develop a new control, this control should only accept mouse event.
my question is:
how can I process an event and then deliver it to the next item in the item hierarchy

I think QCoreApplication::sendEvent(QObject *receiver, QEvent *event) should achieve the goal, but the problem is, is
there any way to get the next item (the receiver parameter of QCoreApplication::sendEvent) by Z-Order ??

class MaskItem : public QQuickPaintedItem
{
    Q_OBJECT

private:
    void paint(QPainter *painter) override
    {
        //...
    }

    bool event(QEvent* e) override
    {
        //...
    }
};

ApplicationWindow{
    width: 800
    height: 600
    minimumWidth: 400
    minimumHeight: 300
    visible: true

    Rectangle{
        anchors.fill: parent
        color: "SkyBlue"
        MouseArea{
            id: realItem
            anchors.fill: parent
            acceptedButtons: Qt.AllButtons
            onPressed: {
                console.log("pressed:", mouse.button)
            }
            onClicked: {
                console.log("clicked:", mouse.button)
            }
        }
    }

    background:  MaskItem{
        anchors.fill: parent
        z: 999
    }
}

[jsulm]

@amyhaber Actually it should be enough to only override what you need and ignore everything else.
For example you can override mousePressEvent(...).
See http://doc.qt.io/qt-5.9/eventsandfilters.html

[amyhaber]

@jsulm I didn't make myself clear, for example. the MarskItem got right button click event, I wanna handle it and then deliver the event to next item.

BTW: thanks for your reply , I'll edit my question

[jsulm]

@amyhaber To handle right click override mousePressEvent(...) and read the link I posted.
"and then deliver the event to next item" - what exactly does this mean? What is "next item"? Do you mean parent?

[amyhaber]

@jsulm yeah, actually I know how to handle event, “the next item” means the next item of z-order.

[jsulm]

This post is deleted!

[amyhaber]

@jsulm

ApplicationWindow{
    width: 800
    height: 600
    minimumWidth: 400
    minimumHeight: 300
    visible: true

    Rectangle{
        anchors.fill: parent
        color: "SkyBlue"
        MouseArea{
            id: itemContent
            anchors.fill: parent
            acceptedButtons: Qt.AllButtons
            onPressed: {
                console.log("pressed:", mouse.button)
            }
            onClicked: {
                console.log("clicked:", mouse.button)
            }
        }
    }

    background:  MaskItem{
        id: itemMask
        anchors.fill: parent
        z: 999
    }
}

here is the sample code, itemMask and itemContent have same position & size in ApplicationWindow. the only difference is z value.
so now I wanna itemMask can draw something according to the received event. but sometime it also need deliver the event to itemContent
for example, when itemMask received right button clicked, I wanna itemContent can also perceive the click event

[amyhaber]

@jsulm and thanks for your patient, I think I can declare a property in my control. when QML code instantiate this control, it must tell the control which item is the "next item of z-order" by assigning a value to this property