Qt Installer Framework: How to allow only Updates?

[j1elo]

I am attempting to create an updater tool for my already installed application in a locked-down system. The Maintenance tool from the Qt Installer Framework seems perfect, with its integration with remote repositories, but I would need to remove the "Add" and "Remove" components options, leaving only the "Update" option.

I already tried installer.removeWizardPageItem(component, "UninstallerRadioButton")
and gui.pageById(QInstaller.Introduction).UninstallerRadioButton.hide()
with no success :-(

Is there any way to remove those radio buttons by using scripting?

[j1elo]

Solution:

Controller.prototype.IntroductionPageCallback = function()
{
    // Installer is "updater" when it is run with "--updater"
    // or Controller does "installer.setUpdater()"
    if (installer.isUpdater()) {
        var widget = gui.currentPageWidget(); // Same as gui.pageById(QInstaller.Introduction);
        widget.findChild("UpdaterRadioButton").checked = true;
        
        // Disable paint events on these widgets, through the QWidget::updatesEnabled property.
        // I tried with the "visible" property, but it is not enough, because for some reason
        // that property gets reset under some conditions. For example, if "Next" button is pressed
        // and no updates are available.
        widget.findChild("PackageManagerRadioButton").updatesEnabled = false;
        widget.findChild("UninstallerRadioButton").updatesEnabled = false;
    }
}