SplitCountryButton.java

/*
 * This is part of Geomajas, a GIS framework, http://www.geomajas.org/.
 *
 * Copyright 2008-2015 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.plugin.editing.gwt.example.client.split;

import org.geomajas.gwt.client.controller.GraphicsController;
import org.geomajas.gwt.client.map.event.FeatureDeselectedEvent;
import org.geomajas.gwt.client.map.event.FeatureSelectedEvent;
import org.geomajas.gwt.client.map.event.FeatureSelectionHandler;
import org.geomajas.gwt.client.map.feature.Feature;
import org.geomajas.gwt.client.util.GeometryConverter;
import org.geomajas.gwt.client.widget.MapWidget;
import org.geomajas.plugin.editing.client.split.GeometrySplitService;
import org.geomajas.plugin.editing.client.split.event.GeometrySplitStartEvent;
import org.geomajas.plugin.editing.client.split.event.GeometrySplitStartHandler;
import org.geomajas.plugin.editing.client.split.event.GeometrySplitStopEvent;
import org.geomajas.plugin.editing.client.split.event.GeometrySplitStopHandler;

import com.smartgwt.client.types.Alignment;
import com.smartgwt.client.types.VerticalAlignment;
import com.smartgwt.client.widgets.Label;
import com.smartgwt.client.widgets.events.ClickEvent;
import com.smartgwt.client.widgets.events.ClickHandler;
import com.smartgwt.client.widgets.toolbar.ToolStripButton;

/**
 * Toolbar button for adding inner rings to a polygon.
 * 
 * @author Pieter De Graef
 */
public class SplitCountryButton extends ToolStripButton implements FeatureSelectionHandler, GeometrySplitStartHandler,
		GeometrySplitStopHandler {

	private final MapWidget mapWidget;

	private final GeometrySplitService service;

	private GraphicsController previousController;

	private Label label;

	public SplitCountryButton(final GeometrySplitService service, final MapWidget mapWidget) {
		this.service = service;
		this.mapWidget = mapWidget;

		setHoverWidth(300);
		setTitle("Start splitting process");
		setTooltip("Select a country on the map. Then draw a splitting line.");
		setIconSize(24);
		setHeight(32);

		addClickHandler(new ClickHandler() {

			public void onClick(ClickEvent event) {
				previousController = mapWidget.getController();
				mapWidget.setController(new SelectForSplitController(mapWidget));
			}
		});
		mapWidget.getMapModel().addFeatureSelectionHandler(this);

		service.addGeometrySplitStartHandler(this);
		service.addGeometrySplitStopHandler(this);
	}

	// ------------------------------------------------------------------------
	// FeatureSelectionHandler:
	// ------------------------------------------------------------------------

	public void onFeatureSelected(FeatureSelectedEvent event) {
		Feature feature = event.getFeature();
		mapWidget.setController(previousController);
		previousController = null;
		service.start(GeometryConverter.toDto(feature.getGeometry()));

		// Now let the user know:
		if (label != null) {
			label.destroy();
			label = null;
		}

		label = new Label("<p><b>You have selected " + feature.getLabel() + "!</b></p><p>Now continue by drawing a "
				+ "splitting line on the map. This is done by clicking points on the map, ending with a double " +
				"click.</p><p>Finally choose an option in the toolbar (finish, cancel, undo, ...).</p>");
		label.setParentElement(mapWidget);
		label.setShowEdges(true);
		label.setBackgroundColor("#ffffd0");
		label.setPadding(5);
		label.setWidth(350);
		label.setTop(25);
		label.setLeft(-220); // start off screen
		label.setValign(VerticalAlignment.CENTER);
		label.setAlign(Alignment.CENTER);
		label.setAnimateTime(1000); // milliseconds
		label.addClickHandler(new ClickHandler() {

			public void onClick(ClickEvent event) {
				label.destroy();
			}
		});

		label.animateMove(75, 25);
	}

	public void onFeatureDeselected(FeatureDeselectedEvent event) {
	}

	public void onGeometrySplitStart(GeometrySplitStartEvent event) {
		setDisabled(true);
	}

	public void onGeometrySplitStop(GeometrySplitStopEvent event) {
		if (label != null) {
			label.destroy();
			label = null;
		}
		setDisabled(false);
	}
}