Not able to assign value of array element to property of QML module

[saurabh162]

Dear developers,

I have initialized values of an array "schaltSchranks" in a QML module "map" and trying access its value in another module "mainwindow.qml". but could not able to do it. I would be grateful to you if you please inform me what correction should I do in my code.

/// Module in which values in array is pushed
Map {
    id: map
	property var schaltSchranks
	property int newSchaltSchrankID;
	
	
	 function addSchaltSchrank()
    {
        var count = map.schaltSchranks.length

        newSchaltSchrankID = getNewSchaltSchrankID();

        var schaltSchrank = Qt.createQmlObject ('SchaltSchrank{}', map)
        map.addMapItem(schaltSchrank)
        schaltSchrank.z = map.z+1
        schaltSchrank.coordinate = mouseArea.lastCoordinate

        //update list of SS

        var myArrayUseToArrangeElementOfSSarray = []

        if(newSchaltSchrankID <= count)  // If new ID assigned for new SS is between lowest and highest ID
        {
            for (var i = 0; i<count; i++){

                if(i===(newSchaltSchrankID-1))
                {
                    myArrayUseToArrangeElementOfSSarray.push(schaltSchrank) // then push new SS at right location in SS array according to its ID
                }
                else
                {
                    myArrayUseToArrangeElementOfSSarray.push(schaltSchranks[i])
                }
            }
        }
        else // otherwise push new SS at the end of SS array
        {
            for (var j = 0; j<count; j++){
                myArrayUseToArrangeElementOfSSarray.push(schaltSchranks[j])
            }
            myArrayUseToArrangeElementOfSSarray.push(schaltSchrank)
        }
        schaltSchranks =myArrayUseToArrangeElementOfSSarray    
    }
}

/// Each element of schaltSchrank is:

MapQuickItem {
    id: schaltSchrank

    property alias lastMouseX: schaltSchrankMouseArea.lastX
    property alias lastMouseY: schaltSchrankMouseArea.lastY
    property alias schaltSchrankColor: image.color
    property int schaltSchrankID: 0
    property int  schaltSchrankTelefonNummer: 0
    property string standort: "a"
    property int breite: 0
    property int lange: 0
    property bool hauptschrank: false
    property int  hauptschrankNummer:  0
}

/// Main module where I am trying to access values of array "schaltSchranks"

import "map"

   SchaltschrankPropertyDialogBox
    {
         id: schaltSchrankPropertyDialog      
         schlatschrankIDvalue:       map.schaltSchranks[map.currentSchaltSchrank].schaltSchrankID    

    onOKButtonClicked: {
    
                               console.log("Schaltschrank ID: " +  map.schaltSchranks[map.currentSchaltSchrank].schaltSchrankID)  // Here I am to access schaltSchranks without problem
}

   }
   

///Error I am getting: Error: qrc:/MainWindow.qml:134: TypeError: Cannot read property 'schaltSchrankID' of undefined

[Pl45m4]

@saurabh162 said in Not able to assign value of array element to property of QML module:

TypeError: Cannot read property 'schaltSchrankID' of undefined

Have a look here:

• https://stackoverflow.com/questions/36736573/qml-cannot-read-property-xxx-of-undefined

[saurabh162]

hello @Pl45m4

Thank you very much for fast reply !! I have read link mentioned by you but I could not understand how can I use mentioned solution in my cas. Can you please elaborate little bit for me. Sorry I am new to QML. Thank you very much !!

[Pl45m4]

@saurabh162

I'm not an expert when it comes to QML, but map is your id of Map module. If what the guy on SO said, is correct, you can't access your "Schaltschränke" from another module by their id.

This line

schlatschrankIDvalue:       map.schaltSchranks[map.currentSchaltSchrank].schaltSchrankID

[saurabh162]

@Pl45m4 thank you very much for update. But I am able to do so in next statement in same module " SchaltschrankPropertyDialogBox", where I am printing its value using console.log . I have also updated console.log statement in "SchaltschrankPropertyDialogBox"" module in my post given above for your kind consideration. Thanks !!