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ICelleditor: show error and do not allow to loose focus until valid data is inserted [message #941513]

Fri, 12 October 2012 11:48

Eclipse User

Hi.

I'm implementing a tableviewer and two buttons to add and remove records.
Using Jface emf.edit databinding, I'm also implementing editing support for each field. for that I defined textcelleditors and Icelleditorvalidator.

My problem is: I want the user not exiting the editor until he inserted valid data, and When he is trying to exit and data is invalid I want to show an error messagebox.
Is this possible ?

I almost managed to do some of these things (with listener), however there exists always some where I stumble upon:
-listener.applyeditorvalue is called twice when exiting editor.
-listener.editorValuechange is called on each change

But I think the problem is around lostfocus event.

Is there any way to implement this?

Thanks in advance.

Re: ICelleditor: show error and do not allow to loose focus until valid data is inserted [message #1001325 is a reply to message #941513]

Wed, 16 January 2013 08:42

Eclipse User

Hi,

I'm facing the same problem:

final TextCellEditor textCellEditor = new TextCellEditor(table, SWT.NONE);
textCellEditor.addListener(new ICellEditorListener() {

@Override
public void applyEditorValue() 
{
    if (notOk) ErrorDialog.openError(null, "Error", "Problem", new Status(IStatus.WARNING, "foo", "Error."));
}

@Override
public void cancelEditor() {
}

@Override
public void editorValueChanged(boolean arg0, boolean arg1) {
}

});

applyEditorValue get's called twice, and the user needs to call the Errormessage twice (I do not have the problem if I do not display the ErrorDialog).

Any suggestion welcome (I'm using Eclipse 4.2.1).
Bernard.

Re: ICelleditor: show error and do not allow to loose focus until valid data is inserted [message #1001495 is a reply to message #1001325]

Wed, 16 January 2013 15:30

Eclipse User

Ok, I could find a suitable workaround here: http://www.eclipsezone.com/eclipse/forums/m92122629.html, by adding a simple volatile flag:

textCellEditor.addListener(new ICellEditorListener() {

private volatile boolean inProgress = false;

@Override
public void applyEditorValue() {
   if (inProgress) {
      return;
   }
   inProgress = true;
   ...
if (notOk) ErrorDialog.openError(null, "Error", "Problem", new Status(IStatus.WARNING, "foo", "Error."));
   ...
   inProgress = false;
}

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