Forum @ SIB Visions

Is it possible to show a "Save changes" question before closing a screen?

If we use writeback isolation level DATAROW, it's a relevant question and also for simple Form screens, which only contains editors.

If you extend DataSourceWorkScreen, it should be possible to use:

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setAskBeforeClose(true);
//optional
//setAskBeforeCloseMessage("Save changes?");


Override the method

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protected boolean hasChanges()


if you need specific control about change detection.

If you don't extend the DataSourceWorkScreen, it's also possible but needs more work:

Overwrite the method

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notifyDestroy()


and check if your screen has changes. If it has changes, show a message and throw a SilentAbortException. The SilentAbortException won't open the error dialog but will cancel the current operation.

An example:

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if (isChanged())
{
    getApplication().showQuestion(this, "Save changes?",
                                  "doSaveChanges", "doRevertChanges");
   
    throw new SilentAbortException("Save question");
}