System Information Example

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 // Skip all pages and go directly to finished page.
 // (see also componenterror example)
 function cancelInstaller(message)
 {
     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'>" + message +"</font>";
     installer.setValue("FinishedText", abortText);
 }

 // Returns the major version number as int
 //   string.split(".", 1) returns the string before the first '.',
 //   parseInt() converts it to an int.
 function majorVersion(str)
 {
     return parseInt(str.split(".", 1));
 }

 function Component()
 {
     //
     // Check whether OS is supported.
     //
     // For Windows and macOS we check the kernel version:
     //  - Require at least Windows Vista (winnt kernel version 6.0.x)
     //  - Require at least OS X 10.7 (Lion) (darwin kernel version 11.x)
     //
     // If the kernel version is older we move directly
     // to the final page & show an error.
     //
     // For Linux, we check the distribution and version, but only
     // show a warning if it does not match our preferred distribution.
     //

     // start installer with -v to see debug output
     console.log("OS: " + systemInfo.productType);
     console.log("Kernel: " + systemInfo.kernelType + "/" + systemInfo.kernelVersion);

     var validOs = false;

     if (systemInfo.kernelType === "winnt") {
         if (majorVersion(systemInfo.kernelVersion) >= 6)
             validOs = true;
     } else if (systemInfo.kernelType === "darwin") {
         if (majorVersion(systemInfo.kernelVersion) >= 11)
             validOs = true;
     } else {
         if (systemInfo.productType !== "opensuse"
                 || systemInfo.productVersion !== "13.2") {
             QMessageBox["warning"]("os.warning", "Installer",
                                    "Note that the binaries are only tested on OpenSUSE 13.2.",
                                    QMessageBox.Ok);
         }
         validOs = true;
     }

     if (!validOs) {
         cancelInstaller("Installation on " + systemInfo.prettyProductName + " is not supported");
         return;
     }

     //
     // Hide/select packages based on architecture
     //
     // Marking a component as "Virtual" will hide it in the UI.
     // Marking a component with "Default" will check it.
     //
     console.log("CPU Architecture: " +  systemInfo.currentCpuArchitecture);

     installer.componentByName("root.i386").setValue("Virtual", "true");
     installer.componentByName("root.x86_64").setValue("Virtual", "true");

     if ( systemInfo.currentCpuArchitecture === "i386") {
         installer.componentByName("root.i386").setValue("Virtual", "false");
         installer.componentByName("root.i386").setValue("Default", "true");
     }
     if ( systemInfo.currentCpuArchitecture === "x86_64") {
         installer.componentByName("root.x86_64").setValue("Virtual", "false");
         installer.componentByName("root.x86_64").setValue("Default", "true");
     }
 }