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label length within form toolkit [message #638655]

Fri, 12 November 2010 00:49

Luca Ferrari

Messages: 159
Registered: November 2009

Senior Member

Hi all,
in my application I'm using a form toolkit for an editor and, besides all the widgets, I'd like to display a label that will report some error/notice messages. Since the layout of the form is a table wrap layout with two columns, I've defined such label as follows:

Label errorLabel = toolkit.createLabel( parent, "" );
errorLabel.setForeground( Display.getCurrent().getSystemColor( SWT.COLOR_RED ) );
TableWrapData twData = new TableWrapData();
twData.align = TableWrapData.CENTER;
twData.grabHorizontal = true;
twData.colspan = 2;
errorLabel.setLayoutData( twData );

The problem is that, when I set the text of the label after certain event occurs, the label does not show anything. After a while of testing I found that the label cannot display a new text longer than the one specified at the creation time, that is if I change the first line with the following:

Label errorLabel = toolkit.createLabel( parent, "     " );  // 5 blanks

the text can be changed to a string no more longer than 5 characters.
Am I doing something wrong or is not possible to change the length of a label when it is created by a form toolkit?

Thanks.

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Re: label length within form toolkit [message #638880 is a reply to message #638655]

Fri, 12 November 2010 21:09

Lakshmi P Shanmugam

Messages: 279
Registered: July 2009
Location: India

Senior Member

Hi,

You could try setting the align flag to twData.align = TableWrapData.FILL or set align to TableWrapData.FILL_GRAB in the constructor. If required, set SWT.CENTER style on the label in toolkit.createLabel() so that the text is center aligned within the label.

UI Forms related questions belong to the Platform User Assistance forum. So, you could post your question there to get the best answer.

Lakshmi P Shanmugam

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