Make Connections to Loader depending on loaded File

[sandro4912]

I load a loader object with a specific file like this:

onClicked: {
                    questionSqlTableModel.generateNewRandomQuestions(2)
                    loader.setSource("quiz/Quiz.qml",
                                     {"randomQuestions":
                                         questionSqlTableModel.randomQuestions})
                }

Now the page Quiz.qml emits a signal I need to wait for. This I can check with a Connection:

Connections {
       target: loader.item

       function onFinnished(correctAnswers) {
           console.log("correct Answer: " +  correctAnswers)
       }
   }

Now my loader can also load other pages:

            ToolButton {
                text: qsTr("Show Table")
                icon.name: "document-open"
                onClicked: {
                    loader.setSource("sql_table_view/SqlTableView.qml")
                }
            }

Do I have to dynamically enable disable the Connection depending on the content? If yes how can I only listen for the connection if a specific file is loaded?

Like

Load file A connect to Signal B emitted from A
Load file C connect to Signal D emitted from C

edit: do I have to set ignoreUnknownSignals to false when the page is not loaded from Connections or active = false ?

edit:

I tired to disable the Connection when loading another element like this:

Connections {
    id: quizConnections
    target: loader.item

    function onFinnished(correctAnswers) {
        console.log("correct Answer: " +  correctAnswers)
        quizConnections.enabled = false
        loader.setSource("result/Result.qml")
    }
}

But then I get this error:

QML Connections: Detected function "onFinnished" in Connections element. This is probably intended to be a signal handler but no signal of the target matches the name.

[sierdzio]

@sandro4912 said in Make Connections to Loader depending on loaded File:

do I have to set ignoreUnknownSignals to false when the page is not loaded from Connections or active = false ?

use active property. You don't need to call it in the slot, you can do it declaratively instead:

Connections {
    id: quizConnections
    target: loader.item
    active: loader.source === "quiz/Quiz.qml"

    function onFinnished(correctAnswers) {
        console.log("correct Answer: " +  correctAnswers)
    }
}

Or even set the target only when needed:

Connections {
    id: quizConnections
    target: loader.source === "quiz/Quiz.qml"? loader.item : undefined

    function onFinnished(correctAnswers) {
        console.log("correct Answer: " +  correctAnswers)
    }
}

[sandro4912]

@sierdzio said in Make Connections to Loader depending on loaded File:

Connections {
id: quizConnections
target: loader.item
active: loader.source === "quiz/Quiz.qml"

function onFinnished(correctAnswers) {
    console.log("correct Answer: " +  correctAnswers)
}

}

That gives error:

Cannot assign to non-existent property "active"

I tried instead:

enabled: loader.source === "quiz/Quiz.qml"

which gives still:

qrc:/qml/main.qml:53:5: QML Connections: Detected function "onFinnished" in Connections element. This is probably intended to be a signal handler but no signal of the target matches the name.

I think to surpress the warning we have to set ignoreUnknownSignals to true aswell

[sierdzio]

@sandro4912 said in Make Connections to Loader depending on loaded File:

I think to surpress the warning we have to set ignoreUnknownSignals to true aswell

Yeah in that case it seems like a good choice.