Make JSurface export method public

src/main/java/net/ericaro/surfaceplotter/surface/JSurface.java

@@ -428,61 +428,6 @@ public SurfaceVertex[][] getValuesArray() {
 	private boolean dragged; // dragged flag
 	private int click_x, click_y; // previous mouse cursor position
 
-	/**
-	 * <code>mouseDown</code> event handler. Sets internal tracking variables
-	 * for dragging operations.
-	 * 
-	 * @param e
-	 *            the event
-	 * @param x
-	 *            the x coordinate of cursor
-	 * @param y
-	 *            the y coordinate of cursor
-	 */
-
-	public void doExportPNG(File file) throws IOException {
-		if (file == null)
-			return;
-		int h, w;
-		w = 50;
-		h = 30;
-		java.awt.image.BufferedImage bf = new java.awt.image.BufferedImage(getWidth(), getHeight(), java.awt.image.BufferedImage.TYPE_INT_RGB);
-		Graphics2D g2d = bf.createGraphics();
-
-		// g2d.setColor(java.awt.Color.white);
-		// g2d.fillRect(0,0,getWidth() ,getHeight());
-		// g2d.setColor(java.awt.Color.black);
-		export(g2d);
-		// java.awt.image.BufferedImage bf2=bf.getSubimage(0,0,w,h);
-		boolean b = javax.imageio.ImageIO.write(bf, "PNG", file);
-	}
-
-	/**
-	 * needs batik, will reintroduce it later
-	 * @throws ParserConfigurationException 
-	 */
-	public void doExportSVG(File file) throws IOException, ParserConfigurationException{
-		if (file == null)
-			return;
-
-		// Create an instance of org.w3c.dom.Document
-		org.w3c.dom.Document document = javax.xml.parsers.DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
-
-		// Create an instance of the SVG Generator
-
-		org.apache.batik.svggen.SVGGraphics2D svgGenerator = new org.apache.batik.svggen.SVGGraphics2D(document);
-
-		// Ask the test to render into the SVG Graphics2D implementation
-		export(svgGenerator);
-
-		// Finally, stream out SVG to the standard output using UTF-8 //
-		// character to byte encoding
-		boolean useCSS = true; // we want to use CSS		// style attribute
-		java.io.Writer out = new java.io.OutputStreamWriter(new java.io.FileOutputStream(file), "UTF-8");
-		svgGenerator.stream(out, useCSS);
-		out.close();
-	}
-
 	/**
 	 * Paints surface. Creates surface plot, contour plot, or density plot based
 	 * on current vertices array, contour plot flag, and density plot flag. If
@@ -591,7 +536,13 @@ public void update(Graphics g) {
 		paintComponent(g); // do not erase, just paint
 	}
 
-	private void export(Graphics g) {
+	/**
+	* Exports <code>JSurface</code> to the specified graphics object.
+	*
+	* @param g the graphics object
+	*
+	*/
+	public void export(Graphics g) {
 		if (data_available && !interrupted) {
 			boolean old = printing;
 			printing = true;

src/main/java/net/ericaro/surfaceplotter/surface/SurfaceUtils.java

@@ -0,0 +1,53 @@
+package net.ericaro.surfaceplotter.surface;
+
+import java.awt.Graphics2D;
+import java.io.File;
+import java.io.IOException;
+
+import javax.xml.parsers.ParserConfigurationException;
+
+public class SurfaceUtils {
+
+  public static void doExportPNG(JSurface surface, File file) throws IOException {
+    if (file == null)
+      return;
+    int h, w;
+    w = 50;
+    h = 30;
+    java.awt.image.BufferedImage bf = new java.awt.image.BufferedImage(surface.getWidth(), surface.getHeight(), java.awt.image.BufferedImage.TYPE_INT_RGB);
+    Graphics2D g2d = bf.createGraphics();
+
+    g2d.setColor(java.awt.Color.white);
+    g2d.fillRect(0,0,surface.getWidth() ,surface.getHeight());
+    g2d.setColor(java.awt.Color.black);
+    surface.export(g2d);
+    // java.awt.image.BufferedImage bf2=bf.getSubimage(0,0,w,h);
+    boolean b = javax.imageio.ImageIO.write(bf, "PNG", file);
+  }
+
+  /**
+   * needs batik, will reintroduce it later
+   * @throws ParserConfigurationException
+   */
+  public static void doExportSVG(JSurface surface, File file) throws IOException, ParserConfigurationException{
+    if (file == null)
+      return;
+
+    // Create an instance of org.w3c.dom.Document
+    org.w3c.dom.Document document = javax.xml.parsers.DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
+
+    // Create an instance of the SVG Generator
+
+    org.apache.batik.svggen.SVGGraphics2D svgGenerator = new org.apache.batik.svggen.SVGGraphics2D(document);
+
+    // Ask the test to render into the SVG Graphics2D implementation
+    surface.export(svgGenerator);
+
+    // Finally, stream out SVG to the standard output using UTF-8 //
+    // character to byte encoding
+    boolean useCSS = true; // we want to use CSS		// style attribute
+    java.io.Writer out = new java.io.OutputStreamWriter(new java.io.FileOutputStream(file), "UTF-8");
+    svgGenerator.stream(out, useCSS);
+    out.close();
+  }
+}

src/test/java/Sample.java

@@ -16,6 +16,7 @@
 import net.ericaro.surfaceplotter.JSurfacePanel;
 import net.ericaro.surfaceplotter.Mapper;
 import net.ericaro.surfaceplotter.ProgressiveSurfaceModel;
+import net.ericaro.surfaceplotter.surface.SurfaceUtils;
 
 
 
@@ -53,7 +54,7 @@ private void button1ActionPerformed()  {
 		JFileChooser jfc = new JFileChooser();
 		try {
 			if (jfc.showSaveDialog(surfacePanel1) == JFileChooser.APPROVE_OPTION )
-				surfacePanel1.getSurface().doExportSVG( jfc.getSelectedFile());
+				SurfaceUtils.doExportSVG(surfacePanel1.getSurface(), jfc.getSelectedFile());
 		} catch (Exception e) {
 			e.printStackTrace();
 		}