Thursday, October 30, 2014

Creating dynamic QML object asynchronously

We can create QML object dynamically by using createComponent and createObject API.

Like follow,
var component = Qt.createComponent("Button.qml");
if (component.status == Component.Ready)
    component.createObject(parent, {"x": 100, "y": 100});
You can find more information regarding same here.

Latest Qt release added new API named incubateObject. This allows object to be created in asynchronously. You can find more information about this API here.

Following code I written for Ubuntu touch calendar application, which uses the same. Here thing to remember is that incubateObject returns the incubator and not created object itself. You need to get object from incubator by incubator.object call.
var incubator = delegate.incubateObject(bubbleOverLay);
if (incubator.status !== Component.Ready) {
    incubator.onStatusChanged = function(status) {
        if (status === Component.Ready) {
            incubator.object.objectName = children.length;
            assignBubbleProperties( incubator.object, event);
} else {
    incubator.object.objectName = children.length;
    assignBubbleProperties(incubator.object, event);