PGroupToolItem.java

/*******************************************************************************
 * Copyright (c) 2010 Ubiquiti Networks, Inc. and others
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Tom Schindl<tom.schindl@bestsolution.at> - initial API and implementation
 *******************************************************************************/
package org.eclipse.nebula.widgets.pgroup;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Item;
import org.eclipse.swt.widgets.TypedListener;

/**
 * Instances of this class represent a selectable user interface object that
 * represents a button in a {@link PGroup}.
 */
public class PGroupToolItem extends Item {
	private Rectangle bounds;
	private boolean selection;
	private Rectangle dropdownArea;
	private PGroup parent;
	private String tooltip;

	public PGroupToolItem(PGroup parent, int style) {
		super(parent, style);
		this.parent = parent;
		parent.addToolItem(this);
	}

	public void setBounds(Rectangle bounds) {
		this.bounds = bounds;
	}

	public Rectangle getBounds() {
		return bounds;
	}

	/**
	 * Sets the selection state of the receiver.
	 *
	 * @param selection
	 *            the new selection state
	 */
	public void setSelection(boolean selection) {
		if ((getStyle() & (SWT.CHECK | SWT.RADIO)) == 0)
			return;

		if (selection) {
			PGroupToolItem[] items = parent.getToolItems();
			for (int i = 0; i < items.length; i++) {
				items[i].setSelection(false);
			}
		}
		this.selection = selection;
		parent.redraw();
	}

	/**
	 * Returns <code>true</code> if the receiver is selected, and false
	 * otherwise.
	 *
	 * @return the selection state
	 */
	public boolean getSelection() {
		return selection;
	}

	public void addSelectionListener(SelectionListener listener) {
		TypedListener typedListener = new TypedListener(listener);
		addListener(SWT.Selection, typedListener);
		addListener(SWT.DefaultSelection, typedListener);
	}

	public void removeSelectionListener(SelectionListener listener) {
		removeListener(SWT.Selection, listener);
		removeListener(SWT.DefaultSelection, listener);
	}

	void setDropDownArea(Rectangle dropdownArea) {
		this.dropdownArea = dropdownArea;
	}

	void onMouseDown(Event e) {
		if ((getStyle() & SWT.DROP_DOWN) == 0) {
			setSelection(!getSelection());
			notifyListeners(SWT.Selection, new Event());
		} else {
			if ( ((getStyle() & SWT.PUSH) == SWT.PUSH) && ( dropdownArea == null || !dropdownArea.contains(e.x, e.y))) {
				notifyListeners(SWT.Selection, new Event());
			} else {
				Event event = new Event();
				event.detail = SWT.ARROW;
				event.x = bounds.x;
				event.y = bounds.y + bounds.height;
				notifyListeners(SWT.Selection, event);
			}
		}
	}

	public void setToolTipText (String tooltip)
	{
		this.tooltip = tooltip;
	}

	public String getToolTipText ()
	{
		return tooltip;
	}
}