1 // Copyright 2002, FreeHEP.
2 package org.freehep.graphicsio.emf.gdi;
3
4 import java.awt.Dimension;
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 * SetViewportExtEx TAG.
14 *
15 * @author Mark Donszelmann
16 * @version $Id: SetViewportExtEx.java 10367 2007-01-22 19:26:48Z duns $
17 */
18 public class SetViewportExtEx extends EMFTag {
19
20 private Dimension size;
21
22 public SetViewportExtEx() {
23 super(11, 1);
24 }
25
26 public SetViewportExtEx(Dimension size) {
27 this();
28 this.size = size;
29 }
30
31 public EMFTag read(int tagID, EMFInputStream emf, int len)
32 throws IOException {
33
34 return new SetViewportExtEx(emf.readSIZEL());
35 }
36
37 public void write(int tagID, EMFOutputStream emf) throws IOException {
38 emf.writeSIZEL(size);
39 }
40
41 public String toString() {
42 return super.toString() + "\n size: " + size;
43 }
44
45 // The SetViewportExtEx function sets the horizontal and vertical
46 // extents of the viewport for a device context by using the specified values.
47
48 /**
49 * displays the tag using the renderer
50 *
51 * @param renderer EMFRenderer storing the drawing session data
52 */
53 public void render(EMFRenderer renderer) {
54 // The viewport refers to the device coordinate system of the device space.
55 // The extent is the maximum value of an axis. This function sets the maximum
56 // values for the horizontal and vertical axes of the viewport in device
57 // coordinates (or pixels). When mapping between page space and device space,
58 // SetWindowExtEx and SetViewportExtEx determine the scaling factor between
59 // the window and the viewport.
60 renderer.setViewportSize(size);
61 }
62 }