added checking - can only show modal dialog in event listener
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@ -230,7 +230,10 @@ public class Messagebox extends Window implements EventListener
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this.setWidth("500px");
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this.setPosition("center");
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this.setClosable(true);
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this.setAttribute(Window.MODE_KEY, Window.MODE_MODAL);
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if (Events.inEventListener())
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this.setAttribute(Window.MODE_KEY, Window.MODE_MODAL);
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else
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this.setAttribute(Window.MODE_KEY, Window.MODE_HIGHLIGHTED);
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this.setSizable(true);
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this.setVisible(true);
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