Question for Qt6.2 - Qt.labs.platform Dialog

mingr

In Qt 5.15, Qt.labs.platform Dialog seems to be fine, and I can use it just by declaring it.

But seems like for Qt6, the Dialog can no longer be used. As it will now show Dialog is an abstract base class.

I wonder if this is the case or I set up things wrong?

I did not see any doc mentioning the change.

Platform: Windows/msvc_2019_64

jsulm

@mingr Please take a look at https://doc-snapshots.qt.io/qt6-dev/qtlabsplatform-index.html and decide which dialog you need. Dialog is base class for the other dialogs.

mingr

@jsulm Thank you for your reply!

Yeah, I am aware of this, but when I try using Dialog (as you mentioned, base class for the other dialogs), I will have logs saying Dialog is an abstract base class.

So I would just like to confirm that this is intended.

QQmlApplicationEngine failed to load component
qrc:/main.qml:17:5: Dialog is an abstract base class

import QtQuick
import QtQuick.Controls
import Qt.labs.platform

ApplicationWindow {
    id: root

    width: 640
    height: 480

    minimumHeight: 100
    minimumWidth: 100

    visible: true
    title: qsTr("Test")

    Dialog {
        id: windowsRect

        anchors.fill: parent

        Button {
            id: dddd

            anchors.centerIn: parent

            width: 100
            height: 100

            focus: true

            KeyNavigation.tab: topLeft
            KeyNavigation.up: topLeft
            KeyNavigation.down: KeyNavigation.tab

            background: Rectangle {
                color: dddd.focus ? "yellow" : "pink"
            }
        }

        Grid {
            anchors.top: dddd.bottom
            anchors.horizontalCenter: dddd.horizontalCenter
            anchors.topMargin: 10

            width: 100; height: 100
            columns: 2

            AbstractButton {
                id: topLeft
                width: 50; height: 50
                focus: true

                KeyNavigation.up: dddd
                KeyNavigation.right: topRight
                KeyNavigation.down: bottomLeft

                background: Rectangle {
                    color: topLeft.focus ? "red" : "yellow"
                }
            }

            AbstractButton {
                id: topRight
                width: 50; height: 50

                KeyNavigation.left: topLeft
                KeyNavigation.down: bottomRight
                background: Rectangle {
                    color: topRight.focus ? "red" : "yellow"
                }
            }

            AbstractButton {
                id: bottomLeft
                width: 50; height: 50

                KeyNavigation.right: bottomRight
                KeyNavigation.up: topLeft
                background: Rectangle {
                    color: bottomLeft.focus ? "red" : "yellow"
                }
            }

            AbstractButton {
                id: bottomRight
                width: 50; height: 50

                KeyNavigation.left: bottomLeft
                KeyNavigation.up: topRight
                background: Rectangle {
                    color: bottomRight.focus ? "red" : "yellow"
                }
            }
        }
    }
}

jsulm

@mingr That's the point: you're not supposed to use Dialog, use one of the derived dialogs.

mingr

@jsulm Ok, Thanks,

Cause originally, I used Dialog and it seems to work as expected (like a QWidget dialog).

jimmyCAO

because the qt.labs.platform has the Dialog as well, need to specifically use Dialog control in QtQuick.Controls