NestedFieldEditor.java

/*****************************************************************************
 * Copyright (c) 2006-2013, Cloudsmith Inc.
 * The code, documentation and other materials contained herein have been
 * licensed under the Eclipse Public License - v 1.0 by the copyright holder
 * listed above, as the Initial Contributor under such license. The text of
 * such license is available at www.eclipse.org.
 *****************************************************************************/

package org.eclipse.buckminster.ui.prefs;

import org.eclipse.jface.preference.FieldEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Layout;

/**
 * A FieldEditor containing other FieldEditors
 * 
 * @author Thomas Hallgren
 */
public class NestedFieldEditor extends FieldEditor {
	private Composite group;

	private Label label;

	public NestedFieldEditor(String title, Composite parent) {
		init("", title); //$NON-NLS-1$
		createControl(parent);
	}

	public Composite getControl() {
		return group;
	}

	@Override
	public int getNumberOfControls() {
		return 1;
	}

	@Override
	protected void adjustForNumColumns(int numColumns) {
		Layout layout = group.getLayout();
		if (layout instanceof GridLayout) {
			GridLayout gl = (GridLayout) layout;
			gl.numColumns = numColumns;
			gl.marginHeight = 0;
			gl.marginWidth = 0;
			gl.makeColumnsEqualWidth = false;
		}
		GridData gd = (GridData) group.getLayoutData();
		gd.horizontalSpan = numColumns;
		gd = (GridData) label.getLayoutData();
		gd.horizontalSpan = numColumns;
	}

	@Override
	protected void doFillIntoGrid(Composite parent, int numColumns) {
		group = new Composite(parent, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.numColumns = numColumns;
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		layout.makeColumnsEqualWidth = false;
		group.setLayout(layout);
		group.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false, numColumns, 1));
		label = new Label(group, SWT.NONE);
		label.setText(getLabelText());
		label.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, numColumns, 1));
	}

	@Override
	protected void doLoad() {
	}

	@Override
	protected void doLoadDefault() {
	}

	@Override
	protected void doStore() {
	}
}