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Editorial Team
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Asked: 2026-06-15T11:48:10+00:00

Hi Just going through GWT 2.5, came across ErrorHandler , which can be added

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Hi Just going through GWT 2.5, came across ErrorHandler, which can be added to a widget which has implemented hasErrorHanlder. Can anyone help me in understanding.

I am trying to write new Custom widget by extending the Compoiste if i implement HasErrorHanlders interface it helps me to catch what ever errors occur in this class should be known to it usage class… may be i am wrong..?

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  1. Editorial Team

    It is a DOM event and not GWT widget event. It is fired or used only in some GWT internal cases for DOM related errors. I have seen only GWT Image class use this class.

    It is of no use in Composite widgets as far i have come across. It would be interesting if we can find any other use case. Note: It is raised or triggered as DomEvent and is not triggered otherwise in GWT code.

    Edit – Use Uncaught Exception Handler in GWT to handle such odd cases.

    1) http://stackoverflow.com/questions/3028521/gwt-setuncaughtexceptionhandler
2) http://google-web-toolkit.googlecode.com/svn/javadoc/2.5/com/google/gwt/core/client/GWT.html#setUncaughtExceptionHandler(com.google.gwt.core.client.GWT.UncaughtExceptionHandler)
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