custom QQuickPaintedItem in SwipeView cannot accept key event

Zero-one

As you can see code is really simple. I custom a QQuickPaintedItem class named CustomItem.here is the code.

class CustomItem : public QQuickPaintedItem
{
    Q_OBJECT

public:
    CustomItem( QQuickItem* parent = nullptr ) {
        setFlag( QQuickItem::ItemIsFocusScope, true );
        setFocus(true);
    }

    void paint( QPainter* painter ) {
        painter->setBrush(Qt::cyan);
        painter->setPen(Qt::darkCyan);
        painter->drawRect(0, 0, 100,100);

        painter->setBrush(Qt::NoBrush);
        painter->setPen(Qt::darkGreen);
        painter->drawRect(40, 40, 100, 100);
    }


protected:
    virtual void keyPressEvent(QKeyEvent* event) {
        qDebug() << event->key();
    }

private slots:

};

qmlRegisterType<CustomItem>("CustomItem", 1, 0, "CustomItem");

CustomItem in Item can accept key event

ApplicationWindow {
    visible: true
    width: 640
    height: 480
    title: qsTr("KeyBoard Input For Custom QQuickPaintedItem")

    Item {
        id: mainView
        anchors.fill: parent
        CustomItem {
            anchors.fill: parent
        }
    }
}

but, CustomItem in SwipeView cannot accept key event

ApplicationWindow {
    visible: true
    width: 640
    height: 480
    title: qsTr("KeyBoard Input For Custom QQuickPaintedItem")

    SwipeView {
        id: swipeView
        anchors.fill: parent
        currentIndex: tabBar.currentIndex
        interactive: false

        CustomItem {
        }

        Page {
            Label {
                text: qsTr("custom QQuickPaintedItem")
                anchors.centerIn: parent
            }
        }
    }

    footer: TabBar {
        id: tabBar
        currentIndex: swipeView.currentIndex
        TabButton {
            text: qsTr("View")
        }
        TabButton {
            text: qsTr("Info")
        }
    }
}

what's wrong

Zero-one

I'm sure it is retalted to the version. I set swipeview's focus to true and upgradd to Qt 5.14, it work. (in Qt 5.12 not work). @jeremy_k @dheerendra

dheerendra

Need to set focus:true for swipeview. It should work.

Zero-one

I set swipeview's focus to true, it not work.

Zero-one

@dheerendra Is the issue related to the version？ I'm using Qt 5.12.10.

jeremy_k

I'm using Qt 5.12.10.

Is upgrading to Qt 5.15 or 6 possible? If so, does that fix the issue?

CustomItem in SwipeView cannot accept key event

Does the same thing happen when deriving from QQuickItem or using a Qt provided element such as Item?

What item has focus when the SwipeView is displaying CustomItem? Use Window.activeFocusItem and its change signal to find out.

A visual indicator can be created by reparenting a Rectangle. Eg:

Window {
    Rectangle {
        id: focusTracer
        border.width: 1
        border.color: "red"
        color: "transparent"
        anchors.fill: parent
        parent: Window.activeFocusItem
    }
    ...
}

Zero-one

I'm sure it is retalted to the version. I set swipeview's focus to true and upgradd to Qt 5.14, it work. (in Qt 5.12 not work). @jeremy_k @dheerendra