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1   // Copyright 2002, FreeHEP.
2   package org.freehep.graphicsio.emf.gdi;
3   
4   import java.awt.geom.AffineTransform;
5   import java.io.IOException;
6   
7   import org.freehep.graphicsio.emf.EMFInputStream;
8   import org.freehep.graphicsio.emf.EMFOutputStream;
9   import org.freehep.graphicsio.emf.EMFTag;
10  import org.freehep.graphicsio.emf.EMFRenderer;
11  
12  /**
13   * SetWorldTransform TAG.
14   * 
15   * @author Mark Donszelmann
16   * @version $Id: SetWorldTransform.java 10367 2007-01-22 19:26:48Z duns $
17   */
18  public class SetWorldTransform extends EMFTag {
19  
20      private AffineTransform transform;
21  
22      public SetWorldTransform() {
23          super(35, 1);
24      }
25  
26      public SetWorldTransform(AffineTransform transform) {
27          this();
28          this.transform = transform;
29      }
30  
31      public EMFTag read(int tagID, EMFInputStream emf, int len)
32              throws IOException {
33  
34          return new SetWorldTransform(emf.readXFORM());
35      }
36  
37      public void write(int tagID, EMFOutputStream emf) throws IOException {
38          emf.writeXFORM(transform);
39      }
40  
41      public String toString() {
42          return super.toString() + "\n  transform: " + transform;
43      }
44  
45      /**
46       * displays the tag using the renderer
47       *
48       * @param renderer EMFRenderer storing the drawing session data
49       */
50      public void render(EMFRenderer renderer) {
51          if (renderer.getPath() != null) {
52              renderer.setPathTransform(transform);
53          } else {
54              renderer.resetTransformation();
55              renderer.transform(transform);
56          }
57      }
58  }