How to register and access C++ class methods in QML

Sushma_MP

there is no errors the thing is i am not able to access all methods which are present in my cpp class only test() is appearing in main.qml class

raven-worx

@Sushma_MP

when it doesn't work, there is definitely an error/notice. Check the console.
what do you mean with "appearing"? Do you mean QtCreator doesn't offer it in the auto-completion popup?

Sushma_MP

@raven-worx
when it doesn't work, there is definitely an error/notice. Check the console.

when we try to add new method try to access it in main.qml...like u said it is not appearing in auto-popup

raven-worx

@Sushma_MP
i don't know exactly when QtCreator updates it's completion model.
But closing and reopening the project should trigger it.

Sushma_MP

@raven-worx
how is it possible then...everytime we can't close and reopen Qt creator rite...is it a bug...??

sneubert

In Qt Creator did you try to call [Tools]->[QML/JS]->Reset Code Model, after you compiled your cpp class?

raven-worx

@Sushma_MP said in How to register and acess cpp class methods in QML:

how is it possible then...everytime we can't close and reopen Qt creator rite...is it a bug...??

i wasn't talking about restarting the whole QtCreator process, but only close and reopen the project.
The problem is, when is the right time to update the code-completion model?

Sushma_MP

Hi ,

Actually i am facing another problem :
I created cpp class and registered in main.cpp and imported in main.qml
when i try to access that class in maim.qml i am getting as a invalid property .
my code is as fallow```
import QtQuick 2.4
import QtQuick.Controls 1.3
import QtQuick.Window 2.2
import QtQuick.Dialogs 1.2
import QtQuick 2.5
import QtGraphicalEffects 1.0
import com.songclass 1.0

ApplicationWindow {
flags: Qt.FramelessWindowHint

title: qsTr("Infotainment")
width: (Screen.width/2)+200
height: (Screen.height/2)
visible: true
modality: Qt.WindowModal

selectsong{

here i get as invalid property with a red underlined for selectsong
}

MenuScreen{
    id:menusrcn
    visible: false
}
Settings{
    id:settingScreen
    visible: false
}
MusicVedio{
    id:vedioScreen
    visible: false
}
MediaPlay{
    id:musicScreen
    visible: false
}
Radio{
    id:radioScreen
    visible: false
}

Rectangle{
    id:main_rect
    width: parent.width
    height: parent.height
    color: "#e9ebf8"
    Image {
        id: back_img
        source: "qrc:/HomeScreen.png"
        anchors.centerIn: parent
    }

    Rectangle
    {
        id: welcome_rect
        width: 250
        height: 40
        anchors.top: parent.top
        anchors.topMargin: 100
        anchors.horizontalCenter: parent.horizontalCenter
        color: "transparent"
        Text {
            id: welcome_text
            text: qsTr("L&T Car Infotainment")
            color:"#fefcfd"
            font.pixelSize: 36
            font.family: "Courier"
            font.bold: true
            font.italic: true
            anchors.centerIn: parent
            style: Text.Sunken
            styleColor: "#000000"
        }
    }

    Rectangle{
        id: next_page_rect
        width: parent.width/6
        height: parent.height/12
        color:"Transparent"
        anchors.right: parent.right
        anchors.bottom: parent.bottom
        anchors.rightMargin: 15
        anchors.bottomMargin: 8
        Image {
            id: next_image
            source: "qrc:/Fwd_arrow.png"
            width: parent.width
            height: parent.height
            smooth: true
            fillMode: Image.PreserveAspectFit
            antialiasing: true
            MouseArea{
                id: next_page_rect_mousearea
                anchors.fill: parent
                onClicked: {
                    menusrcn.visible= true
                    main_rect.visible= false
                }
            }
        }
    }
}

}

raven-worx

@Sushma_MP
selectsong is not a valid property of ApplicationWindow type.
QML types must start with an Uppercase-Letter to distinguish them from properties as you can see in your error.

Sushma_MP

ohh but selectsong is my cpp class name

Sushma_MP

thank you soo much i got the solution by taking it as uppercase letter as you said...

raven-worx

@Sushma_MP said in How to register and acess cpp class methods in QML:

ohh but selectsong is my cpp class name

you can also leave the class name, but register it with a upper case name should also work.