Busy Indicator for QML

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QtQuick.Controls 1.3 come with the BusyIndicator. It is a simple and ready-to-use component. Here is a short example for how to use it:

import QtQuick 2.4
import QtQuick.Controls 1.3
import QtQuick.Window 2.2

ApplicationWindow {
    title: qsTr("Hello World")
    width: 640
    height: 480
    visible: true

    BusyIndicator {
       id: busyIndication
       anchors.centerIn: parent
       // 'running' defaults to 'true'

    Button {
        anchors.horizontalCenter: parent.horizontalCenter
        anchors.bottom: parent.bottom
        text: busyIndication.running ? "Stop Busy Indicator" : "Start Busy Indicator"
        checkable: true
        checked: busyIndication.running
        onClicked: busyIndication.running = !busyIndication.running