org.geomajas.gwt2.client.widget.AbstractMapWidget Maven / Gradle / Ivy
/*
* This is part of Geomajas, a GIS framework, http://www.geomajas.org/.
*
* Copyright 2008-2014 Geosparc nv, http://www.geosparc.com/, Belgium.
*
* The program is available in open source according to the GNU Affero
* General Public License. All contributions in this program are covered
* by the Geomajas Contributors License Agreement. For full licensing
* details, see LICENSE.txt in the project root.
*/
package org.geomajas.gwt2.client.widget;
import org.geomajas.gwt2.client.map.MapPresenter;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.DoubleClickEvent;
import com.google.gwt.event.dom.client.DoubleClickHandler;
import com.google.gwt.event.dom.client.MouseDownEvent;
import com.google.gwt.event.dom.client.MouseDownHandler;
import com.google.gwt.event.dom.client.MouseUpEvent;
import com.google.gwt.event.dom.client.MouseUpHandler;
import com.google.gwt.user.client.ui.Composite;
/**
* Simple base implementation of a widget that can be placed on top of the map. It provides a handler to stop events
* from bubbling to the actual map controllers, which might be handy. Of course, you don't have to use this, as any
* widget can be placed on the map.
*
* @author Pieter De Graef
*/
public abstract class AbstractMapWidget extends Composite {
protected final MapPresenter mapPresenter;
public AbstractMapWidget(MapPresenter mapPresenter) {
this.mapPresenter = mapPresenter;
}
// ------------------------------------------------------------------------
// Getters and setters:
// ------------------------------------------------------------------------
/**
* Combination of different handlers with a single goal: stop all the events from propagating to the map. This is
* meant to be used for clickable widgets.
*
* @author Pieter De Graef
*/
public class StopPropagationHandler implements MouseDownHandler, MouseUpHandler, ClickHandler, DoubleClickHandler {
public void onDoubleClick(DoubleClickEvent event) {
event.stopPropagation();
}
public void onClick(ClickEvent event) {
event.stopPropagation();
}
public void onMouseDown(MouseDownEvent event) {
event.stopPropagation();
event.preventDefault();
}
public void onMouseUp(MouseUpEvent event) {
event.stopPropagation();
}
}
}