Flex application not redrawing screen

From time to time we observe issues with the Pepper player, the built-in Flash player of the Chrome browser. Since January we fight against the problem that our Flex application is not properly redrawing the screen after user interaction.

Fortunately, we stumbled across this issue in the chromium bug database. According to the comments there we have to force the refresh of the application. Of course, we should do this for the Pepper player only, but this is not a great deal. The Adobe online help states how to detect a Pepper player.

Solution

First we check if the user has a Pepper player. In this case we create a timer which calls every 500 ms invalidateDisplayList() on the main Application object.

private static var _refreshTimer:Timer;

public static function checkPepperPlayer(app:Application):void {
    if (Capabilities.manufacturer === "Google Pepper" && !_refreshTimer) {
        _refreshTimer = new Timer(500);
        _refreshTimer.addEventListener(TimerEvent.TIMER, function(event:TimerEvent):void {
            app.invalidateDisplayList()
        });
        _refreshTimer.start();
    }
}
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