Is there a way to toggle a button in qml from python (PySide6)

NYBL

Im trying to test a login window in qml.

To do that i need to toggle button's and enter text to the textField, is there a way to do it without signals?

so far i'v found that i can interact with the QObject level of the qml items (but that only to set properties as far as i know) like this:

main.py:

        myApp = QtGui.QGuiApplication(sys.argv)
        myEngine = QtQml.QQmlEngine()
        directory = os.path.dirname(os.path.abspath(__file__))
        component = QtQml.QQmlComponent(myEngine,('some_path')
        obj = component.create()
        if component.status() == QtQml.QQmlError:
            return -1
        uname = obj.findChild(QtCore.QObject, "usernameField")
        print(uname.property("width"))

main.qml:

ApplicationWindow{
    
    id: window 
    width: 400
    height: 580
    visible: true
    title: qsTr("חלון כניסה")
    maximumHeight: height
    maximumWidth: width
    minimumHeight: height
    minimumWidth: width

    // SET FLAGS
    flags: Qt.WindowCloseButtonHint | Qt.WindowMinimizeButtonHint | Qt.CustomizeWindowHint |  Qt.MSWindowsFixedSizeDialogHint | Qt.WindowTitleHint

    // SET MATERIAL STYLE
    Material.theme: Material.Dark
    Material.accent: Material.LightBlue
    Item{
        TextField{
            id: usernameField
            objectName : "usernameField" 
            Layout.preferredWidth: 300
            text: qsTr("")
            selectByMouse: true
            placeholderText: qsTr("Username")
            anchors.horizontalCenter: parent.horizontalCenter       
            anchors.topMargin: 60
        }

        // TEXT FIELD USERNAME
        TextField{
            id : passwordField
            Layout.preferredWidth: 300
            text: qsTr("")
            selectByMouse: true
            placeholderText: qsTr("Password")
            Layout.alignment: Qt.AlignHCenter | Qt.AlignVCenter
            anchors.topMargin: 10
            echoMode: TextInput.Password
            objectName: "foo_object"
         }
          Button{
               id: buttonLogin
               Layout.preferredWidth: 100
               text: qsTr("Login")
               onClicked: funcs.login(usernameField.text, passwordField.text)                         
         }  
   }
}

ndias

Hi @NYBL,

Can you provide more details about your problem?

You can set usernameField text from Python side using:

uname = obj.findChild(QtCore.QObject, "usernameField")
uname.setProperty('text', 'Some text here.......')

but I didn't realize if that was really your question.

Regards

NYBL

@ndias said in Is there a way to toggle a button in qml from python (PySide6):

:

Hey, i know i can set properties but i need to trigger the push button that says 'Login'
in order to test the functionality of my backend logic.

For example if user press submit with blank username and password
my backend sends a response that the fields can be empty, and so on.

P.S I know i can set some signals to handle the problem but that's a mess...

SGaist

Hi,

I haven't used it but Qt has QML support in the QtTest module which might help you.

On a side note, you should be pro-active and not let your users enter invalid values like blank credentials. This will avoid sending useless requests to your backend and be more user friendly.

NYBL

@SGaist
Hi, Thanks for the reply.
About your side note you say that i should do those checking inside qml (js) rather then in python?

SGaist

Use a validator to ensure the input is valid and enable the send button when it's the case. The validator job is not to ensure that the entered value is correct but that it follows the requirements for its use.