C++ find child qml item included from other file

PhTe

My problem is that i have a QML component (SettingsDialog) which is in its own file (SettingsDialog.qml) and used in my main window (Main.qml).

Now i need to access the SettingsDialog in C++ but the findChild functions always returns NULL.

rootWindow->findChild<QQuickItem*>("settingsDialog"); // Returns NULL

The findchild call to get the TabView - it is also in the Main.qml - works.

rootWindow->findChild<QQuickItem*>("tabView") // Returns pointer to the tab view

If i start the application its all fine. I can open the dialog and it will be shown, so there the QML files seem to be ok.

Does anyone have an idea, why only the findchild call for the dialog does not work?

Is it because of the separate QML file?

The Main.qml looks like:

ApplicationWindow {
    width: 1200
    height: 800
    visible: true
    id: root

    // Menu, Toolbar and other stuff

    SettingsDialog {
        id: settingsDialog
        objectName: "settingsDialog"
        visible: false
    }

    TabView {
        id: tabView
        anchors.fill: parent
        objectName: "tabView"
    }
}

The SettingsDialog.qml contains

Dialog {
    id: settingsDialog
    title: "Settings"

    signal saveSettings();

    contentItem: Rectangle {
        implicitWidth: 500
        implicitHeight: 200

        Button {
            id: saveButton
            anchors.right: parent.right
            anchors.bottom: parent.bottom
            anchors.rightMargin: 5
            anchors.bottomMargin: 5
            text: qsTr("Save")

            onClicked: {
                settingsDialog.saveSettings();
                settingsDialog.visible = false;
            }
        }
    }
}

p3c0

@PhTe

rootWindow->findChild<QQuickItem*>("settingsDialog");

Cast to QObject instead of QQuickItem.

I don't know why but I can find the dialog only if it's inside an extra Item{}:

    QObject *someItem = engine.rootObjects().first()->findChild<QObject*>("someIdentifier");
    someItem->setProperty("color", "red");

import QtQuick 2.6
import QtQuick.Window 2.2
import QtQuick.Controls 1.4
import QtQuick.Dialogs 1.2

Window {
    visible: true
    width: 100
    height: 100

    Rectangle {
        anchors.centerIn: parent
        color: "blue"
        width: 50
        height: 50
    }

    Button {
        onClicked: dialog.open()
    }

    Item {
        Dialog {
            property color color: "white"
            id: dialog
            objectName: "someIdentifier"
            visible: false
            contentItem: Rectangle { color: dialog.color }
        }
    }
}

PhTe

@p3c0 said:

Cast to QObject instead of QQuickItem.

That works. :)
Thanks.

Unsolved C++ find child qml item included from other file