QML CorkBoard Example

In the corkboard example, we use the following .qml files:

• corkboards.qml

• Mode.qml

The main.cpp holds the application logic to load the main view stored in the corkboards.qml file.

int main(int argc, char *argv[])
{
    QGuiApplication application(argc, argv);
    QQuickView view;
    view.setSource(QUrl("qrc:/corkboards.qml"));
    view.setResizeMode(QQuickView::SizeRootObjectToView);
    view.show();
    return application.exec();
}

There are two basic QML components in this file:

• NearField

• ListView

The first time the NearField QML type is instantiated, the Component.onCompleted handler will start the NFC polling process. The onMessageRecordsChanged handler parses NFC Messages that are detected by the NearField component and builds up a data model that is passed into the ListView. Additionally, every time the NearField manager stops the polling process, the onPollingChanged handler restarts it.

    NearField {
        property bool requiresManualPolling: false
        orderMatch: false

        onMessageRecordsChanged: {
        ...
        onPollingChanged: {
        ...
        Component.onCompleted: {
        ...
        }

The ListView component takes a ListModel as parameter (built from the NFC records). The view of each of the items of the model is defined by the Mode component (its implementation details can be found in the file Mode.qml). The data model consists of a list of corkboards. Each corkboard can display multiple NFC text message records.

    ListView {
        id: listView
        ...
        model: list
        ...
        delegate: Mode {}
    }

A corkboard title is displayed for each of the items that form part of the data model:

        Text {
            anchors { horizontalCenter: parent.horizontalCenter; top: parent.top; topMargin: 10}
            text: name;
            font { pixelSize: 30; bold: true }

Every text record that was read from an NFC message, is represented by a sticky note with its own position on the display. Initially the position is set randomly. The text on the sticky note is set on a TextField.

        Repeater {
            model: notes
            Item {
                id: stickyPage

                x