NewFeatureAction.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.gwt.client.action.menu;

import org.geomajas.gwt.client.action.MenuAction;
import org.geomajas.gwt.client.controller.editing.LineStringEditController;
import org.geomajas.gwt.client.controller.editing.MultiLineStringEditController;
import org.geomajas.gwt.client.controller.editing.MultiPolygonEditController;
import org.geomajas.gwt.client.controller.editing.ParentEditController;
import org.geomajas.gwt.client.controller.editing.PointEditController;
import org.geomajas.gwt.client.controller.editing.PolygonEditController;
import org.geomajas.gwt.client.controller.editing.EditController.EditMode;
import org.geomajas.gwt.client.i18n.I18nProvider;
import org.geomajas.gwt.client.map.layer.Layer;
import org.geomajas.gwt.client.map.layer.VectorLayer;
import org.geomajas.gwt.client.util.WidgetLayout;
import org.geomajas.gwt.client.widget.MapWidget;
import org.geomajas.layer.LayerType;

import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.menu.Menu;
import com.smartgwt.client.widgets.menu.MenuItem;
import com.smartgwt.client.widgets.menu.MenuItemIfFunction;
import com.smartgwt.client.widgets.menu.events.MenuItemClickEvent;

/**
 * Menu action that starts the creation of a new feature on the map.
 *
 * @author Pieter De Graef
 */
public class NewFeatureAction extends MenuAction implements MenuItemIfFunction {

	private MapWidget mapWidget;

	private ParentEditController controller;

	/**
	 * Constructor for the menu action to create a new feature on the map.
	 *
	 * @param mapWidget
	 *            The <code>MapWidget</code> on which editing is in progress.
	 * @param controller
	 *            The current parent editing controller active on the map.
	 */
	public NewFeatureAction(MapWidget mapWidget, ParentEditController controller) {
		super(I18nProvider.getMenu().newFeature(), WidgetLayout.iconVertexCreate);
		this.mapWidget = mapWidget;
		this.controller = controller;
		setEnableIfCondition(this);
	}

	/**
	 * Activate editing, and set the correct child editing controller on the parent editing controller.
	 */
	public void onClick(MenuItemClickEvent event) {
		Layer<?> layer = mapWidget.getMapModel().getSelectedLayer();
		if (layer != null && layer instanceof VectorLayer) {
			mapWidget.getMapModel().getFeatureEditor().startEditing(null, null);
			VectorLayer vLayer = (VectorLayer) layer;
			if (vLayer.getLayerInfo().getLayerType() == LayerType.POINT) {
				controller.setController(new PointEditController(mapWidget, controller));
			} else if (vLayer.getLayerInfo().getLayerType() == LayerType.LINESTRING) {
				controller.setController(new LineStringEditController(mapWidget, controller));
			} else if (vLayer.getLayerInfo().getLayerType() == LayerType.MULTILINESTRING) {
				controller.setController(new MultiLineStringEditController(mapWidget, controller));
			} else if (vLayer.getLayerInfo().getLayerType() == LayerType.POLYGON) {
				controller.setController(new PolygonEditController(mapWidget, controller));
			} else if (vLayer.getLayerInfo().getLayerType() == LayerType.MULTIPOLYGON) {
				controller.setController(new MultiPolygonEditController(mapWidget, controller));
			}
			controller.setEditMode(EditMode.INSERT_MODE);
		}
	}

	/**
	 * Implementation of the <code>MenuItemIfFunction</code> interface. This will determine if the menu action should be
	 * enabled or not. In essence, this action will be enabled if a vector-layer is selected that allows the creation of
	 * new features.
	 */
	public boolean execute(Canvas target, Menu menu, MenuItem item) {
		Layer<?> selected = mapWidget.getMapModel().getSelectedLayer();
		if (selected != null && selected instanceof VectorLayer) {
			VectorLayer layer = (VectorLayer) selected;
			if (layer.getLayerInfo().isCreatable()) {
				return true;
			}
		}
		return false;
	}
}