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Geomajas GWT2 client: Main - Server Extension
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/*
* 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.gwt2.client.map.layer;
import org.geomajas.configuration.client.ClientLayerInfo;
import org.geomajas.configuration.client.ClientMapInfo;
import org.geomajas.gwt2.client.GeomajasServerExtension;
import org.geomajas.gwt2.client.map.MapConfiguration;
import org.geomajas.gwt2.client.map.MapEventBus;
import org.geomajas.gwt2.client.map.ViewPort;
import org.geomajas.gwt2.client.map.layer.tile.TileConfiguration;
import org.geomajas.gwt2.client.map.render.TileRenderer;
/**
* Abstraction of the basic layer interface. Specific layer implementations should use this as a base.
*
* @param The layer meta-data. Some extension of {@link ClientLayerInfo}.
* @author Pieter De Graef
*/
public abstract class AbstractServerLayer extends AbstractTileBasedLayer {
protected ClientMapInfo mapInfo;
protected T layerInfo;
protected TileRenderer tileRenderer;
// ------------------------------------------------------------------------
// Constructors:
// ------------------------------------------------------------------------
/**
* Create a new layer that belongs to the given map model, using the given meta-data.
*
* @param layerInfo The layer configuration from which to create the layer.
* @param viewPort The view port of the map.
* @param eventBus The map centric event bus.
*/
public AbstractServerLayer(MapConfiguration mapConfig, T layerInfo, TileConfiguration tileConfig,
ViewPort viewPort, MapEventBus eventBus) {
super(layerInfo.getId(), tileConfig);
this.mapInfo = mapConfig.getHintValue(GeomajasServerExtension.MAPINFO);
this.layerInfo = layerInfo;
this.markedAsVisible = layerInfo.isVisible();
this.title = layerInfo.getLabel();
setMaxBounds(layerInfo.getMaxExtent());
setViewPort(viewPort);
setEventBus(eventBus);
eventBus.addViewPortChangedHandler(new LayerScaleVisibilityHandler());
}
// ------------------------------------------------------------------------
// Layer implementation:
// ------------------------------------------------------------------------
public String getServerLayerId() {
return layerInfo.getServerLayerId();
}
public ClientMapInfo getMapInfo() {
return mapInfo;
}
public T getLayerInfo() {
return layerInfo;
}
@Override
public boolean isShowing() {
if (markedAsVisible) {
return isVisibleAtViewPortResolution(viewPort);
}
return false;
}
@Override
public double getMaxResolution() {
return 1 / layerInfo.getMinimumScale().getPixelPerUnit();
}
@Override
public double getMinResolution() {
return 1 / layerInfo.getMaximumScale().getPixelPerUnit();
}
}
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