// **********************************************************************
//
// <copyright>
//
// BBN Technologies
// 10 Moulton Street
// Cambridge, MA 02138
// (617) 873-8000
//
// Copyright (C) BBNT Solutions LLC. All rights reserved.
//
// </copyright>
// **********************************************************************
//
// $Source: /cvs/distapps/openmap/src/openmap/com/bbn/openmap/layer/policy/StandardRenderPolicy.java,v $
// $RCSfile: StandardRenderPolicy.java,v $
// $Revision: 1.6.2.3 $
// $Date: 2005/10/26 15:47:15 $
// $Author: dietrick $
//
// **********************************************************************
package com.bbn.openmap.layer.policy;
import java.awt.Composite;
import java.awt.Graphics;
import java.awt.Graphics2D;
import com.bbn.openmap.OMComponent;
import com.bbn.openmap.layer.OMGraphicHandlerLayer;
import com.bbn.openmap.omGraphics.OMGraphicList;
import com.bbn.openmap.proj.Projection;
import com.bbn.openmap.util.Debug;
/**
* The StandardRenderPolicy is a RenderPolicy that simply paints the
* current graphic list. No conditions or deviations are considered.
*/
public class StandardRenderPolicy extends OMComponent implements RenderPolicy {
/**
* Don't let this be null, nothing will happen. At all.
*/
protected OMGraphicHandlerLayer layer;
protected boolean DEBUG = false;
protected Composite composite;
public StandardRenderPolicy() {
DEBUG = Debug.debugging("layer") || Debug.debugging("policy");
}
/**
* Don't pass in a null layer.
*/
public StandardRenderPolicy(OMGraphicHandlerLayer layer) {
this();
setLayer(layer);
}
public void setLayer(OMGraphicHandlerLayer l) {
layer = l;
}
public OMGraphicHandlerLayer getLayer() {
return layer;
}
public Composite getComposite() {
return composite;
}
/**
* Can be used to set Composite objects (like AlphaComposite) on
* Graphics2D objects before the layer is painted.
*
* @param composite
*/
public void setComposite(Composite composite) {
this.composite = composite;
}
/**
* Call made by the policy from the paint(g) method in order to
* set the composite on the Graphics2D object. This method is
* meant to be overridden if needed.
*
* @param g Graphics2D that the Composite will be set on.
*/
protected void setCompositeOnGraphics(Graphics2D g) {
if (composite != null) {
g.setComposite(composite);
}
}
public OMGraphicList prepare() {
if (layer != null) {
return layer.prepare();
} else {
return null;
}
}
public void paint(Graphics g) {
if (layer != null) {
OMGraphicList list = layer.getList();
Projection proj = layer.getProjection();
if (list != null && layer.isProjectionOK(proj)) {
if (proj != null) {
g.setClip(0, 0, proj.getWidth(), proj.getHeight());
}
setCompositeOnGraphics((Graphics2D) g);
list.render(g);
} else if (DEBUG) {
Debug.output(layer.getName()
+ ".paint(): "
+ (list == null ? "NULL list, skipping..."
: " skipping due to projection."));
}
} else {
Debug.error("RenderPolicy.paint(): NULL layer, skipping...");
}
}
}