/* uDig - User Friendly Desktop Internet GIS client
* http://udig.refractions.net
* (C) 2004, Refractions Research Inc.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* (http://www.eclipse.org/legal/epl-v10.html), and the Refractions BSD
* License v1.0 (http://udig.refractions.net/files/bsd3-v10.html).
*/
package org.locationtech.udig.tools.edit.activator;
import java.io.IOException;
import java.util.List;
import org.locationtech.udig.catalog.CatalogPlugin;
import org.locationtech.udig.catalog.IGeoResource;
import org.locationtech.udig.mapgraphic.grid.GridMapGraphic;
import org.locationtech.udig.mapgraphic.internal.MapGraphicService;
import org.locationtech.udig.project.ILayer;
import org.locationtech.udig.project.IMap;
import org.locationtech.udig.project.command.SetLayerVisibilityCommand;
import org.locationtech.udig.project.internal.Layer;
import org.locationtech.udig.project.internal.LayerFactory;
import org.locationtech.udig.project.internal.commands.AddLayerCommand;
import org.locationtech.udig.tools.edit.Activator;
import org.locationtech.udig.tools.edit.EditPlugin;
import org.locationtech.udig.tools.edit.EditToolHandler;
import org.locationtech.udig.tools.edit.preferences.PreferenceUtil;
import org.locationtech.udig.tools.edit.support.SnapBehaviour;
import org.locationtech.udig.ui.ProgressManager;
/**
* If the snap behaviour is GRID then enables the grid map graphic on activation and
* disables the layer if this activator originally added the layer (or sets it to visible).
*
* @author Jesse
* @since 1.1.0
*/
public class GridActivator implements Activator {
private static final String KEY = "GRID_ACTIVATOR_INDICATOR";
/**
* Hides the grid layer (visibility=false) if the layer was added or set visible by this class.
*/
public void hideGrid( IMap map ) {
ILayer gridLayer = findGridLayer(map);
if( gridLayer!=null && gridLayer.getBlackboard().get(KEY)!=null ){
setGridLayerVisibility(gridLayer, false);
}
}
/**
* Shows the grid.
*
* @param map map to add the grid to.
*/
public void showGrid( IMap map ) {
ILayer gridLayer = findGridLayer(map);
if( gridLayer!=null ){
setGridLayerVisibility(gridLayer, true);
}else{
addLayer(map);
}
}
public void activate( EditToolHandler handler ) {
if( PreferenceUtil.instance().getSnapBehaviour() == SnapBehaviour.GRID ){
IMap map = handler.getContext().getMap();
showGrid(map);
}
}
public void handleDeactivateError( EditToolHandler handler, Throwable error ) {
EditPlugin.log("", error);
}
public void handleActivateError( EditToolHandler handler, Throwable error ) {
EditPlugin.log("", error);
}
public void deactivate( EditToolHandler handler ) {
if( PreferenceUtil.instance().getSnapBehaviour() == SnapBehaviour.GRID ){
IMap map = handler.getContext().getMap();
hideGrid(map);
}
}
private void addLayer( IMap map ) {
MapGraphicService service=CatalogPlugin.getDefault().getLocalCatalog().getById(MapGraphicService.class, MapGraphicService.SERVICE_ID, ProgressManager.instance().get());
try {
List< ? extends IGeoResource> members = service.resources(ProgressManager.instance().get());
for( IGeoResource resource : members ) {
if( resource.canResolve(GridMapGraphic.class) ){
LayerFactory factory = map.getLayerFactory();
Layer newLayer = factory.createLayer(resource);
newLayer.getBlackboard().put(KEY, KEY);
AddLayerCommand command = new AddLayerCommand(newLayer);
map.sendCommandASync(command);
}
}
} catch (IOException e) {
throw (RuntimeException) new RuntimeException( ).initCause( e );
}
}
private void setGridLayerVisibility( ILayer gridLayer, boolean enabled ) {
if( enabled!=gridLayer.isVisible() ) {
if( enabled ) {
gridLayer.getBlackboard().putString(KEY, KEY);
}
gridLayer.getMap().sendCommandASync(new SetLayerVisibilityCommand(gridLayer, enabled) );
}
}
private ILayer findGridLayer( IMap map ) {
List<ILayer> layers = map.getMapLayers();
ILayer graphicLayer=null;
for( ILayer layer : layers ) {
if( layer.hasResource(GridMapGraphic.class) ){
graphicLayer=layer;
break;
}
}
return graphicLayer;
}
}