org.eclipse.osbp.vaadin.addons.designer.overlay/src/org/eclipse/osbp/vaadin/addons/designer/overlay/client/widgets/OButtonWidget.java

/**
 *                                                                            
 * Copyright (c) 2011, 2016 - Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
 *                                                                            
 * 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:   
 * Florian Pirchner <florian.pirchner@gmail.com> - Initial implementation
 */
package org.eclipse.osbp.vaadin.addons.designer.overlay.client.widgets;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.ui.Button;

// TODO: Auto-generated Javadoc
/**
 * The Class OButtonWidget.
 */
public class OButtonWidget extends Button implements ClickHandler {

	/** The Constant CLASSNAME. */
	private static final String CLASSNAME = "o-button-widget";

	/** The handler. */
	private OButtonClickHandler handler;

	/** The click pending. */
	private boolean clickPending;

	/** The custom event type. */
	private String customEventType;
	
	/**
	 * Instantiates a new o button widget.
	 */
	public OButtonWidget() {
		getElement().setClassName(CLASSNAME);
		initDOM();
	}

	/**
	 * Inits the dom.
	 */
	private void initDOM() {
		addClickHandler(this);
		sinkEvents(Event.ONMOUSEDOWN | Event.ONLOAD | Event.ONMOUSEMOVE);
	}

	/**
	 * Gets the click handler.
	 *
	 * @return the click handler
	 */
	public OButtonClickHandler getClickHandler() {
		return handler;
	}

	/**
	 * Sets the click handler.
	 *
	 * @param handler the new click handler
	 */
	public void setClickHandler(OButtonClickHandler handler) {
		this.handler = handler;
	}
	
	/**
	 * Gets the custom event type.
	 *
	 * @return the custom event type
	 */
	public String getCustomEventType() {
		return customEventType;
	}

	/**
	 * Sets the custom event type.
	 *
	 * @param customEventType the new custom event type
	 */
	public void setCustomEventType(String customEventType) {
		this.customEventType = customEventType;
	}

	/**
	 * Destroy.
	 */
	public void destroy() {
	}

	/* (non-Javadoc)
	 * @see com.google.gwt.event.dom.client.ClickHandler#onClick(com.google.gwt.event.dom.client.ClickEvent)
	 */
	@Override
	public void onClick(ClickEvent event) {
		if (clickPending) {
			handler.clicked(new OButtonClickEvent(this, customEventType));
		}
	}

	/* (non-Javadoc)
	 * @see com.google.gwt.user.client.ui.Widget#onBrowserEvent(com.google.gwt.user.client.Event)
	 */
	@Override
	public void onBrowserEvent(Event event) {
		super.onBrowserEvent(event);

		if (DOM.eventGetType(event) == Event.ONMOUSEDOWN && event.getButton() == Event.BUTTON_LEFT) {
			clickPending = true;
		} else if (DOM.eventGetType(event) == Event.ONMOUSEMOVE) {
			clickPending = false;
		} else if (DOM.eventGetType(event) == Event.ONMOUSEOUT) {
			if (clickPending) {
				click();
			}
			clickPending = false;
		}
	}
}