tree is printable

diff --git a/src/jalview/gui/TreeCanvas.java b/src/jalview/gui/TreeCanvas.java
index c39e407..fd9619e 100755 (executable)
--- a/src/jalview/gui/TreeCanvas.java
+++ b/src/jalview/gui/TreeCanvas.java
@@ -9,8 +9,9 @@ import javax.swing.*;
 import java.awt.*;\r
 import java.awt.event.*;\r
 import java.util.*;\r
+import java.awt.print.*;\r
 \r
-public class TreeCanvas extends JPanel implements MouseListener\r
+public class TreeCanvas extends JPanel implements MouseListener, Runnable, Printable\r
 {\r
   NJTree tree;\r
   JScrollPane scrollPane;\r
@@ -266,10 +267,61 @@ public class TreeCanvas extends JPanel implements MouseListener
     }\r
   }\r
 \r
+  void startPrinting()\r
+  {\r
+    Thread thread = new Thread(this);\r
+    thread.start();\r
+  }\r
 \r
-  public void paintComponent(Graphics g) {\r
+  // put printing in a thread to avoid painting problems\r
+  public void run()\r
+  {\r
+    PrinterJob printJob = PrinterJob.getPrinterJob();\r
+    PageFormat pf = printJob.pageDialog(printJob.defaultPage());\r
+    printJob.setPrintable(this, pf);\r
+    if (printJob.printDialog())\r
+    {\r
+      try\r
+      {\r
+        printJob.print();\r
+      }\r
+      catch (Exception PrintException)\r
+      {\r
+        PrintException.printStackTrace();\r
+      }\r
+    }\r
+  }\r
 \r
 \r
+  public int print(Graphics pg, PageFormat pf, int pi) throws PrinterException\r
+  {\r
+    font = new Font("Verdana",Font.PLAIN,fontSize);\r
+    pg.setFont(font);\r
+    FontMetrics fm = pg.getFontMetrics(font);\r
+\r
+    pg.translate((int)pf.getImageableX(), (int)pf.getImageableY());\r
+\r
+    int pwidth = (int) pf.getImageableWidth();\r
+    int pheight = (int) pf.getImageableHeight();\r
+\r
+    // adjust pheight to row height\r
+    pheight -= (pheight%fm.getHeight());\r
+    pg.setClip(0,0, pwidth, pheight);\r
+\r
+    int noPages = (fm.getHeight() * nameHash.size()) / pheight;\r
+\r
+    if(pi>noPages)\r
+      return Printable.NO_SUCH_PAGE;\r
+\r
+    pg.translate(0, -pheight*pi );\r
+    draw(pg, pwidth, fm.getHeight() * nameHash.size());\r
+\r
+    return Printable.PAGE_EXISTS;\r
+\r
+  }\r
+\r
+  public void paintComponent(Graphics g)\r
+  {\r
     font = new Font("Verdana",Font.PLAIN,fontSize);\r
     g.setFont(font);\r
 \r