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TableWrapLayout on JFace Dialog [message #888560]

Mon, 18 June 2012 09:36

Aravindhan Annamalai

Messages: 89
Registered: July 2009
Location: Chennai

Member

Hi,

I have a button which should open up a dialog when the user clicks on it.

button.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
TestDialog testDialog = new TestDialog(container.getShell());
testDialog.setPolicy(policy);
testDialog.open();
}
});

I am trying to use TableWrapLayout inside TestDialog, like below

@Override
protected Control createDialogArea(Composite parent) {
//Composite composite = new Composite(parent, 0); NOT WORKING
TableWrapLayout tableWrapLayout = new TableWrapLayout();
tableWrapLayout.numColumns = 3;
tableWrapLayout.verticalSpacing = 1;
tableWrapLayout.horizontalSpacing = 1;

TableWrapData twd = new TableWrapData(TableWrapData.FILL_GRAB);
parent.setLayout(tableWrapLayout);
parent.setLayoutData(twd);

Button button = new Button(parent, SWT.NONE);
button.setText("test");

return parent;
}

which gives me a ClassCastException... org.eclipse.ui.forms.widgets.TableWrapData
cannot be cast to org.eclipse.swt.layout.GridData

Am I missing something here?

Regards,
Aravind

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Re: TableWrapLayout on JFace Dialog [message #888566 is a reply to message #888560]

Mon, 18 June 2012 09:47

Jan Krakora

Messages: 477
Registered: December 2009
Location: Prague

Senior Member

Hi,

the parent composite you are setting TableWrapData on, has a parent with the GridLayout. Look at the createDialogArea method javadoc.

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Re: TableWrapLayout on JFace Dialog [message #888626 is a reply to message #888566]

Mon, 18 June 2012 11:47

Aravindhan Annamalai

Messages: 89
Registered: July 2009
Location: Chennai

Member

So.. That concludes that TableWrapLayout can't be used within JFace Dialog as such.

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Re: TableWrapLayout on JFace Dialog [message #888694 is a reply to message #888626]

Mon, 18 June 2012 13:58

Jan Krakora

Messages: 477
Registered: December 2009
Location: Prague

Senior Member

No, just the composite returned from the createDialogArea must have the GridData as a layout data. This composite itself can use whatever layout you need. Something like that:

Composite composite = (Composite) super.createDialogArea(parent);
TableWrapLayout tableWrapLayout = new TableWrapLayout();
tableWrapLayout.numColumns = 3;
tableWrapLayout.verticalSpacing = 1;
tableWrapLayout.horizontalSpacing = 1;
composite.setLayout(tableWrapLayout);

Composite content = new Composite(composite, SWT.NONE);
TableWrapData twd = new TableWrapData(TableWrapData.FILL_GRAB);
content.setLayout(new FillLayout());
content.setLayoutData(twd);

Button button = new Button(parent, SWT.NONE);
button.setText("test");

return composite;

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