Example QTProgressBar

progressbar.js

/**
 * Example QTProgressBar.
 */
function progressbar() {
    /**
     * Sleep for a duration.
     * @param {*} sleepDuration
     */
    this.sleepFor = function (sleepDuration) {
        var now = new Date().getTime();
        while (new Date().getTime() < now + sleepDuration) {}
    };

    /**
     * Create the QT ui.
     * @returns {QWidget} ui object.
     */
    this.createui = function () {
        this.ui = new QWidget();
        this.ui.layout = new QHBoxLayout();
        this.ui.progressbar = new QProgressBar();
        this.ui.progressbar.setMaximum(100);
        this.ui.layout.addWidget(this.ui.progressbar, 0, 0);
        this.ui.setLayout(this.ui.layout);
        return this.ui;
    };

    this.ui = this.createui();
    this.ui.show();

    for (var t = 0; t < 100; t += 1) {
        this.ui.progressbar.value = t + 1;
        this.sleepFor(50);
    }
    MessageBox.information("Operation complete.");
    this.ui.close();
}