installer-framework/examples/quit_installer/packages/org.qtproject.ifw.example.quitinstaller/meta/installscript.js

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function Component()
{
    var result = QMessageBox["question"]("test.quit", "Installer", "Do you want to quit the installer?<br>" +
        "This message box was created through javascript.", QMessageBox.Ok | QMessageBox.Cancel);
    if (result == QMessageBox.Ok) {
        installer.setValue("FinishedText", "<font color='red' size=10>This installer was quit.</font>");
        installer.setDefaultPageVisible(QInstaller.TargetDirectory, false);
        installer.setDefaultPageVisible(QInstaller.ReadyForInstallation, false);
        installer.setDefaultPageVisible(QInstaller.ComponentSelection, false);
        installer.setDefaultPageVisible(QInstaller.StartMenuSelection, false);
        installer.setDefaultPageVisible(QInstaller.PerformInstallation, false);
        installer.setDefaultPageVisible(QInstaller.LicenseCheck, false);
        gui.clickButton(buttons.NextButton);
    } else {
        installer.setValue("FinishedText",
            "<font color='green' size=10>The installer was not quit from javascript.</font>");
    }
}