Can not access the context in QML property

So I have an arraydatamodel in the CPP file, I use qml-> setContextProperty (...) to set it up to allow QML to access, the strangest part is, no matter if I put it in navigationPane Page or a container, it keeps saying can't find not variable, but in the same QML in ListView, they can access it without a problem. The other weird part, it is an another QML is able to access it in the tag of the page, the same model.

By default of the Jun 02 9000 REVIEWS asset:///main.qml:24 09:12:59.416 com.example.IntervalTimer1.testDev_ervalTimer1a7a2c2e2.427733134: ReferenceError: can't find variable: eventsModel
By default of the Jun 02 9000 REVIEWS asset:///main.qml:110 09:12:59.416 com.example.IntervalTimer1.testDev_ervalTimer1a7a2c2e2.427733134: ReferenceError: can't find variable: eventsModel

Here is my code

import bb.cascades 1.0

NavigationPane {
    id: navigationPane
    backButtonsVisible: false
    // Javascript definition
    function udpateTotalTimeLabel() {
        console.log("In updateTotalTimeLabel function");
        var totalHour = 0, totalMinute = 0, totalSecond = 0;
        // To debug javascript object print function
        var print = function(o) {
            var str = '';

            for (var p in o) {
                if (typeof o[p] == 'string') {
                    str += p + ': ' + o[p] + '; 
';
                } else {
                    str += p + ': { 
' + print(o[p]) + '}';
                }
            }

            return str;
        }
        console.log("EventsModel: " + eventsModel.size());
        for (var i = 0; i < eventsModel.size(); i ++) {
            var currentEvent = eventsModel.data([ i ]);
            console.log("EventsEvent: " + currentEvent["EventName"]);
            totalHour += currentEvent["EventHour"];
            totalMinute += currentEvent["EventMinute"];
            totalSecond += currentEvent["EventSecond"];
        }
        if (totalHour < 10) totalHour = "0" + totalHour;
        if (totalMinute < 10) totalMinute = "0" + totalMinute;
        if (totalSecond < 10) totalSecond = "0" + totalSecond;

        totalTimeLabel.text = totalHour + ":" + totalMinute + ":" + totalSecond;
    }

    function onDataReady() {
        console.log("Received DataReady signal");
        navigationPane.udpateTotalTimeLabel();
        newEventSheet.close();
    }

    Page {
        id: root
        titleBar: TitleBar {
            title: "Interval Timer"
        }

.....
    onCreationCompleted: {
        navigationPane.udpateTotalTimeLabel();
        console.log("No of EventsModel: " + eventsModel.size());
        console.log("In sheet creationCompleted");
        mainObj.dataReady.connect(navigationPane.onDataReady);
    }
}

In the PRC

// Default empty project template
#include "applicationui.hpp"

#include 
#include 
#include 
#include "CountdownTimer.hpp"

using namespace bb::cascades;

ApplicationUI::ApplicationUI(bb::cascades::Application *app)
: QObject(app)
{
    // create scene document from main.qml asset
    // set parent to created document to ensure it exists for the whole application lifetime
    QmlDocument *qml = QmlDocument::create("asset:///main.qml").parent(this);

    // Initialize the Array Data Model for holding events
    this->eventsModel = new ArrayDataModel();
    // For Testing only
    QVariantMap event;
    event["EventName"] = "Event1";
    event["EventHour"] = "00";
    event["EventMinute"] = "01";
    event["EventSecond"] = "02";
    this->eventsModel->append(event);

    // create root object for the UI
    AbstractPane *root = qml->createRootObject();

    // Registering the QTimer type to QML
    qmlRegisterType("TimerLibrary", 1, 0, "CountdownTimer");

    // Setting the access for QML to member variable
    qml->setContextProperty("eventsModel",this->eventsModel);
    qml->setContextProperty("mainObj",this);

    // set created root object as a scene
    app->setScene(root);
}

.....

void ApplicationUI::refreshData()
{
    emit dataReady();
}

Thank you.

The fixed.

You must call setContextProperty before calling createRootObject.

Tags: BlackBerry Developers

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