Component Error Example

 /**************************************************************************
 **
 ** Copyright (C) 2020 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the Qt Installer Framework.
 **
 ** $QT_BEGIN_LICENSE:GPL-EXCEPT$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and The Qt Company. For licensing terms
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License version 3 as published by the Free Software
 ** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
 ** included in the packaging of this file. Please review the following
 ** information to ensure the GNU General Public License requirements will
 ** be met: https://www.gnu.org/licenses/gpl-3.0.html.
 **
 ** $QT_END_LICENSE$
 **
 **************************************************************************/

 function abortInstaller()
 {
     installer.setDefaultPageVisible(QInstaller.Introduction, false);
     installer.setDefaultPageVisible(QInstaller.TargetDirectory, false);
     installer.setDefaultPageVisible(QInstaller.ComponentSelection, false);
     installer.setDefaultPageVisible(QInstaller.ReadyForInstallation, false);
     installer.setDefaultPageVisible(QInstaller.StartMenuSelection, false);
     installer.setDefaultPageVisible(QInstaller.PerformInstallation, false);
     installer.setDefaultPageVisible(QInstaller.LicenseCheck, false);

     var abortText = "<font color='red' size=3>" + qsTr("Installation failed:") + "</font>";

     var error_list = installer.value("component_errors").split(";;;");
     abortText += "<ul>";
     // ignore the first empty one
     for (var i = 0; i < error_list.length; ++i) {
         if (error_list[i] !== "") {
             console.log(error_list[i]);
             abortText += "<li>" + error_list[i] + "</li>"
         }
     }
     abortText += "</ul>";
     installer.setValue("FinishedText", abortText);
 }

 function reactOnAbortInstallerChange()
 {
     if (installer.value("ComponentError") === "true")
         abortInstaller();
 }

 function Component()
 {
     installer.finishAllComponentsReset.connect(reactOnAbortInstallerChange);
 }