JAL-3032 make JS properties conditional on Jalview.isJS()
[jalview.git] / src / jalview / gui / Desktop.java
index 774dd4c..701d778 100644 (file)
@@ -26,6 +26,7 @@ import jalview.api.AlignViewportI;
 import jalview.api.AlignmentViewPanel;
 import jalview.bin.Cache;
 import jalview.bin.Jalview;
+import jalview.gui.ImageExporter.ImageWriterI;
 import jalview.io.DataSourceType;
 import jalview.io.FileFormat;
 import jalview.io.FileFormatException;
@@ -40,7 +41,8 @@ import jalview.jbgui.GSplitFrame;
 import jalview.jbgui.GStructureViewer;
 import jalview.structure.StructureSelectionManager;
 import jalview.urls.IdOrgSettings;
-import jalview.util.ImageMaker;
+import jalview.util.BrowserLauncher;
+import jalview.util.ImageMaker.TYPE;
 import jalview.util.MessageManager;
 import jalview.util.Platform;
 import jalview.util.UrlConstants;
@@ -113,6 +115,7 @@ import javax.swing.JMenuItem;
 import javax.swing.JPanel;
 import javax.swing.JPopupMenu;
 import javax.swing.JProgressBar;
+import javax.swing.JTextField;
 import javax.swing.KeyStroke;
 import javax.swing.SwingUtilities;
 import javax.swing.event.HyperlinkEvent;
@@ -348,7 +351,10 @@ public class Desktop extends jalview.jbgui.GDesktop
      * are spawned off as threads rather than waited for during this constructor.
      */
     instance = this;
-    doVamsasClientCheck();
+    if (!Jalview.isJS())
+    {
+      doVamsasClientCheck();
+    }
 
     doConfigureStructurePrefs();
     setTitle("Jalview " + jalview.bin.Cache.getProperty("VERSION"));
@@ -358,6 +364,8 @@ public class Desktop extends jalview.jbgui.GDesktop
     boolean showjconsole = jalview.bin.Cache.getDefault("SHOW_JAVA_CONSOLE",
             false);
     desktop = new MyDesktopPane(selmemusage);
+    
+    
     showMemusage.setSelected(selmemusage);
     desktop.setBackground(Color.white);
     getContentPane().setLayout(new BorderLayout());
@@ -365,9 +373,19 @@ public class Desktop extends jalview.jbgui.GDesktop
     // JScrollPane sp = new JScrollPane();
     // sp.getViewport().setView(desktop);
     // getContentPane().add(sp, BorderLayout.CENTER);
+    
+    // BH 2018 - just an experiment to try unclipped JInternalFrames. 
+    // Must set for all three to be active:
+       if (Jalview.isJS()) 
+       {
+         getRootPane().putClientProperty("swingjs.overflow.hidden", "false");
+         ((JComponent) getContentPane()).putClientProperty("swingjs.overflow.hidden", "false");
+         desktop.putClientProperty("swingjs.overflow.hidden", "false");
+       }
+    
     getContentPane().add(desktop, BorderLayout.CENTER);
     desktop.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
-
+    
     // This line prevents Windows Look&Feel resizing all new windows to maximum
     // if previous window was maximised
     desktop.setDesktopManager(new MyDesktopManager(
@@ -389,13 +407,11 @@ public class Desktop extends jalview.jbgui.GDesktop
       int yPos = Math.max(5, (screenSize.height - 650) / 2);
       setBounds(xPos, yPos, 900, 650);
     }
-    /**
-     * BH 2018
-     * 
-     * @j2sNative
-     */
-    {
-
+    
+    boolean doFullLoad = /** @j2sNative ! */true;
+    
+    if (doFullLoad) {
+      
       jconsole = new Console(this, showjconsole);
       // add essential build information
       jconsole.setHeader("Jalview Version: "
@@ -459,7 +475,7 @@ public class Desktop extends jalview.jbgui.GDesktop
 
               });
 
-    } // end BH 2018 ignore
+    } 
 
     this.setDropTarget(new java.awt.dnd.DropTarget(desktop, this));
 
@@ -534,34 +550,25 @@ public class Desktop extends jalview.jbgui.GDesktop
 
   public void checkForNews()
   {
-
-    /**
-     * BH 2018
-     * 
-     * @j2sNative
-     */
+    final Desktop me = this;
+    // Thread off the news reader, in case there are connection problems.
+    new Thread(new Runnable()
     {
-      final Desktop me = this;
-      // Thread off the news reader, in case there are connection problems.
-      addDialogThread(new Runnable()
+      @Override
+      public void run()
       {
-        @Override
-        public void run()
-        {
-          Cache.log.debug("Starting news thread.");
-
-          jvnews = new BlogReader(me);
-          showNews.setVisible(true);
-          Cache.log.debug("Completed news thread.");
-        }
-      });
-    }
+        Cache.log.debug("Starting news thread.");
+        jvnews = new BlogReader(me);
+        showNews.setVisible(true);
+        Cache.log.debug("Completed news thread.");
+      }
+    }).start();
   }
 
   public void getIdentifiersOrgData()
   {
     // Thread off the identifiers fetcher
-    addDialogThread(new Runnable()
+    new Thread(new Runnable()
     {
       @Override
       public void run()
@@ -578,7 +585,8 @@ public class Desktop extends jalview.jbgui.GDesktop
                   + e.getMessage());
         }
       }
-    });
+    }).start();
+    ;
   }
 
   @Override
@@ -589,32 +597,23 @@ public class Desktop extends jalview.jbgui.GDesktop
 
   void showNews(boolean visible)
   {
-    /**
-     * BH 2018
-     * 
-     * @j2sNative
-     * 
-     */
+    Cache.log.debug((visible ? "Showing" : "Hiding") + " news.");
+    showNews.setSelected(visible);
+    if (visible && !jvnews.isVisible())
     {
-      Cache.log.debug((visible ? "Showing" : "Hiding") + " news.");
-      showNews.setSelected(visible);
-      if (visible && !jvnews.isVisible())
+      new Thread(new Runnable()
       {
-        new Thread(new Runnable()
+        @Override
+        public void run()
         {
-          @Override
-          public void run()
-          {
-            long now = System.currentTimeMillis();
-            Desktop.instance.setProgressBar(
-                    MessageManager.getString("status.refreshing_news"),
-                    now);
-            jvnews.refreshNews();
-            Desktop.instance.setProgressBar(null, now);
-            jvnews.showNews();
-          }
-        }).start();
-      }
+          long now = System.currentTimeMillis();
+          Desktop.instance.setProgressBar(
+                  MessageManager.getString("status.refreshing_news"), now);
+          jvnews.refreshNews();
+          Desktop.instance.setProgressBar(null, now);
+          jvnews.showNews();
+        }
+      }).start();
     }
   }
 
@@ -678,8 +677,7 @@ public class Desktop extends jalview.jbgui.GDesktop
 
   private void doVamsasClientCheck()
   {
-    if (/** @j2sNative false && */ // BH 2018
-    jalview.bin.Cache.vamsasJarsPresent())
+    if (Cache.vamsasJarsPresent())
     {
       setupVamsasDisconnectedGui();
       VamsasMenu.setVisible(true);
@@ -954,7 +952,7 @@ public class Desktop extends jalview.jbgui.GDesktop
           frame.setIcon(false);
         } catch (java.beans.PropertyVetoException ex)
         {
-
+          // System.err.println(ex.toString());
         }
       }
     });
@@ -1119,7 +1117,7 @@ public class Desktop extends jalview.jbgui.GDesktop
   public void inputLocalFileMenuItem_actionPerformed(AlignViewport viewport)
   {
     String fileFormat = Cache.getProperty("DEFAULT_FILE_FORMAT");
-    final JalviewFileChooser chooser = JalviewFileChooser
+    JalviewFileChooser chooser = JalviewFileChooser
             .forRead(Cache.getProperty("LAST_DIRECTORY"), fileFormat);
 
     chooser.setFileView(new JalviewFileView());
@@ -1158,14 +1156,13 @@ public class Desktop extends jalview.jbgui.GDesktop
         new FileLoader().LoadFile(viewport, selectedFile,
                 DataSourceType.FILE, format);
       }
-    }).openDialog(this);
+    }).showOpenDialog(this);
   }
 
   /**
-   * DOCUMENT ME!
+   * Shows a dialog for input of a URL at which to retrieve alignment data
    * 
-   * @param e
-   *          DOCUMENT ME!
+   * @param viewport
    */
   @Override
   public void inputURLMenuItem_actionPerformed(AlignViewport viewport)
@@ -1175,46 +1172,101 @@ public class Desktop extends jalview.jbgui.GDesktop
     JLabel label = new JLabel(
             MessageManager.getString("label.input_file_url"));
 
-    JComboBox history = new JComboBox();
     JPanel panel = new JPanel(new GridLayout(2, 1));
     panel.add(label);
-    panel.add(history);
-    history.setPreferredSize(new Dimension(400, 20));
-    history.setEditable(true);
-    history.addItem("http://www.");
-
-    String historyItems = jalview.bin.Cache.getProperty("RECENT_URL");
-
-    StringTokenizer st;
-
-    if (historyItems != null)
+    
+    /*
+     * the URL to fetch is
+     * Java: an editable combobox with history
+     * JS: (pending JAL-3038) a plain text field
+     */
+    JComponent history;
+    String urlBase = "http://www.";
+    if (Jalview.isJS())
     {
-      st = new StringTokenizer(historyItems, "\t");
-
-      while (st.hasMoreTokens())
+      history = new JTextField(urlBase, 35);
+    }
+    else
+    {
+      JComboBox<String> asCombo = new JComboBox<>();
+      asCombo.setPreferredSize(new Dimension(400, 20));
+      asCombo.setEditable(true);
+      asCombo.addItem(urlBase);
+      String historyItems = Cache.getProperty("RECENT_URL");
+      if (historyItems != null)
       {
-        history.addItem(st.nextElement());
+        for (String token : historyItems.split("\\t"))
+        {
+          asCombo.addItem(token);
+        }
       }
+      history = asCombo;
     }
+    panel.add(history);
+
+    Object[] options = new Object[] { MessageManager.getString("action.ok"),
+        MessageManager.getString("action.cancel") };
+    RunResponse action = new RunResponse(JvOptionPane.OK_OPTION) {
+      @Override
+      public void run()
+      {
+        String url = Jalview.isJS() ? ((JTextField) history).getText()
+                : ((JComboBox<String>) history).getSelectedItem()
+                        .toString();
 
-    // BH 2018 -- providing a callback for SwingJS
-    // dialogOption is just a simple way to provide
-    // context for the modal-like response.
-    // The only requirement is that desktop implement
-    // PropertyChangeListener, which is used already in Java
-    // for changes in input value and such within the dialogs.
+        if (url.toLowerCase().endsWith(".jar"))
+        {
+          if (viewport != null)
+          {
+            new FileLoader().LoadFile(viewport, url, DataSourceType.URL,
+                    FileFormat.Jalview);
+          }
+          else
+          {
+            new FileLoader().LoadFile(url, DataSourceType.URL,
+                    FileFormat.Jalview);
+          }
+        }
+        else
+        {
+          FileFormatI format = null;
+          try
+          {
+            format = new IdentifyFile().identify(url, DataSourceType.URL);
+          } catch (FileFormatException e)
+          {
+            // TODO revise error handling, distinguish between
+            // URL not found and response not valid
+          }
 
-    String dialogOption = "label.input_alignment_from_url";
-    desktop.dialogData = new Object[] { dialogOption, viewport, history };
-    desktop.onDialogReturn(JvOptionPane.showInternalConfirmDialog(desktop,
-            panel, MessageManager.getString(dialogOption),
-            JvOptionPane.OK_CANCEL_OPTION));
+          if (format == null)
+          {
+            String msg = MessageManager.formatMessage("label.couldnt_locate", url);
+            JvOptionPane.showInternalMessageDialog(Desktop.desktop, msg,
+                    MessageManager.getString("label.url_not_found"),
+                    JvOptionPane.WARNING_MESSAGE);
 
-    // no code may follow this, as SwingJS will not block
-    // callback in JavaScript comes via a property change event,
-    // thus going into desktop.onDialogReturn(int) just the same as
-    // in Java.
+            return;
+          }
 
+          if (viewport != null)
+          {
+            new FileLoader().LoadFile(viewport, url, DataSourceType.URL,
+                    format);
+          }
+          else
+          {
+            new FileLoader().LoadFile(url, DataSourceType.URL, format);
+          }
+        }
+      }};
+    String dialogOption = MessageManager
+            .getString("label.input_alignment_from_url");
+    JvOptionPane.newOptionDialog(desktop).response(action)
+            .showInternalDialog(panel, dialogOption,
+                    JvOptionPane.YES_NO_CANCEL_OPTION,
+                    JvOptionPane.PLAIN_MESSAGE, null, options,
+                    MessageManager.getString("action.ok"));
   }
 
   /**
@@ -1376,19 +1428,24 @@ public class Desktop extends jalview.jbgui.GDesktop
   }
 
   /**
-   * DOCUMENT ME!
-   * 
-   * @param e
-   *          DOCUMENT ME!
+   * Action on requesting Help documentation
    */
   @Override
-  public void documentationMenuItem_actionPerformed(ActionEvent e)
+  public void documentationMenuItem_actionPerformed()
   {
     try
     {
-      Help.showHelpWindow();
+      if (Jalview.isJS())
+      {
+        BrowserLauncher.openURL("http://www.jalview.org/help.html");
+      }
+      else
+      {
+        Help.showHelpWindow();
+      }
     } catch (Exception ex)
     {
+      System.err.println("Error opening help: " + ex.getMessage());
     }
   }
 
@@ -1592,28 +1649,22 @@ public class Desktop extends jalview.jbgui.GDesktop
   }
 
   /**
-   * DOCUMENT ME!
-   * 
-   * @param e
-   *          DOCUMENT ME!
+   * Prompts the user to choose a file and then saves the Jalview state as a
+   * Jalview project file
    */
   @Override
-  public void saveState_actionPerformed(ActionEvent e)
+  public void saveState_actionPerformed(boolean asCastor)
   {
-    // TODO: JAL-3048 not needed for Jalview-JS
-
-    JalviewFileChooser chooser = new JalviewFileChooser("jvp",
+    JalviewFileChooser chooser = new JalviewFileChooser(
+            asCastor ? "jvp" : "jvx",
             "Jalview Project");
 
     chooser.setFileView(new JalviewFileView());
     chooser.setDialogTitle(MessageManager.getString("label.save_state"));
-
-    int value = chooser.showSaveDialog(this);
-
-    if (value == JalviewFileChooser.APPROVE_OPTION)
+    int option = chooser.showSaveDialog(this);
+    if (option == JalviewFileChooser.APPROVE_OPTION)
     {
-      final Desktop me = this;
-      final java.io.File choice = chooser.getSelectedFile();
+      File choice = chooser.getSelectedFile();
       setProjectFile(choice);
 
       new Thread(new Runnable()
@@ -1631,7 +1682,14 @@ public class Desktop extends jalview.jbgui.GDesktop
           // TODO prevent user from messing with the Desktop whilst we're saving
           try
           {
-            new Jalview2XML().saveState(choice);
+            if (asCastor)
+            {
+              new Jalview2XML().saveState(choice);
+            }
+            else
+            {
+              new jalview.project.Jalview2XML().saveState(choice);
+            }
           } catch (OutOfMemoryError oom)
           {
             new OOMWarning(
@@ -1642,7 +1700,7 @@ public class Desktop extends jalview.jbgui.GDesktop
             Cache.log.error(
                     "Problems whilst trying to save to " + choice.getName(),
                     ex);
-            JvOptionPane.showMessageDialog(me,
+            JvOptionPane.showMessageDialog(Desktop.this,
                     MessageManager.formatMessage(
                             "label.error_whilst_saving_current_state_to",
                             new Object[]
@@ -1653,10 +1711,10 @@ public class Desktop extends jalview.jbgui.GDesktop
           setProgressBar(null, choice.hashCode());
         }
       }).start();
-    }
+      }
   }
 
-  private void setProjectFile(File choice)
+  void setProjectFile(File choice)
   {
     this.projectFile = choice;
   }
@@ -1667,49 +1725,54 @@ public class Desktop extends jalview.jbgui.GDesktop
   }
 
   /**
-   * DOCUMENT ME!
-   * 
-   * @param e
-   *          DOCUMENT ME!
+   * Prompts the user to choose a file and loads in as a Jalview project file
    */
   @Override
-  public void loadState_actionPerformed(ActionEvent e)
-  {
-    // TODO: JAL-3048 not needed for Jalview-JS
-
+  public void loadState_actionPerformed(boolean asCastor)
+  {
+    // TODO: GET RID OF .JVX BEFORE RELEASE JIM!
+    final String[] suffix = asCastor ? new String[] { "jvp", "jar" }
+            : new String[]
+            { "jvx" };
+    final String[] desc = asCastor
+            ? new String[]
+            { "Jalview Project", "Jalview Project (old)" }
+            : new String[]
+            { "Jalview Project" };
     JalviewFileChooser chooser = new JalviewFileChooser(
-            Cache.getProperty("LAST_DIRECTORY"), new String[]
-            { "jvp", "jar" },
-            new String[]
-            { "Jalview Project", "Jalview Project (old)" },
+            Cache.getProperty("LAST_DIRECTORY"), suffix,
+            desc,
             "Jalview Project");
     chooser.setFileView(new JalviewFileView());
     chooser.setDialogTitle(MessageManager.getString("label.restore_state"));
-
-    int value = chooser.showOpenDialog(this);
-
-    if (value == JalviewFileChooser.APPROVE_OPTION)
+    chooser.response(new RunResponse(JalviewFileChooser.APPROVE_OPTION)
     {
-      final File selectedFile = chooser.getSelectedFile();
-      setProjectFile(selectedFile);
-      final String choice = selectedFile.getAbsolutePath();
-      Cache.setProperty("LAST_DIRECTORY", selectedFile.getParent());
-      new Thread(new Runnable()
+      @Override
+      public void run()
       {
-        @Override
-        public void run()
+        File selectedFile = chooser.getSelectedFile();
+        setProjectFile(selectedFile);
+        final String choice = selectedFile.getAbsolutePath();
+        Cache.setProperty("LAST_DIRECTORY", selectedFile.getParent());
+        new Thread(new Runnable()
         {
-          setProgressBar(MessageManager.formatMessage(
-                  "label.loading_jalview_project", new Object[]
-                  { choice }), choice.hashCode());
-          try
-          {
-            new Jalview2XML().loadJalviewAlign(choice);
-          } catch (OutOfMemoryError oom)
+          @Override
+          public void run()
           {
+               try {
+              if (asCastor)
+              {
+                new Jalview2XML().loadJalviewAlign(choice);
+              }
+              else
+              {
+                new jalview.project.Jalview2XML().loadJalviewAlign(choice);
+              }
+            } catch (OutOfMemoryError oom)
+            {
             new OOMWarning("Whilst loading project from " + choice, oom);
-          } catch (Exception ex)
-          {
+            } catch (Exception ex)
+            {
             Cache.log.error(
                     "Problems whilst loading project from " + choice, ex);
             JvOptionPane.showMessageDialog(Desktop.desktop,
@@ -1719,11 +1782,13 @@ public class Desktop extends jalview.jbgui.GDesktop
                             { choice }),
                     MessageManager.getString("label.couldnt_load_project"),
                     JvOptionPane.WARNING_MESSAGE);
+            }
           }
-          setProgressBar(null, choice.hashCode());
-        }
-      }).start();
-    }
+        }).start();
+      }
+    });
+    
+    chooser.showOpenDialog(this);
   }
 
   @Override
@@ -2367,8 +2432,7 @@ public class Desktop extends jalview.jbgui.GDesktop
       @Override
       public void run()
       {
-        if (/** @j2sNative false && */ // BH 2018
-        Cache.getDefault("CHECKURLLINKS", true))
+        if (Cache.getDefault("CHECKURLLINKS", true))
         {
           // check what the actual links are - if it's just the default don't
           // bother with the warning
@@ -2446,158 +2510,8 @@ public class Desktop extends jalview.jbgui.GDesktop
    * @author AMW
    */
   public class MyDesktopPane extends JDesktopPane
-          implements Runnable, PropertyChangeListener
+          implements Runnable
   {
-
-    public Object[] dialogData;
-
-    // @Override
-    @Override
-    public void propertyChange(PropertyChangeEvent event)
-    {
-      Object val = event.getNewValue();
-      String name = event.getPropertyName();
-      System.out.println(name);
-      switch (event.getSource().getClass().getName())
-      {
-      case "javax.swing.JOptionPane":
-        switch (name)
-        {
-        case "inputValue":
-          onDialogReturn(val);
-          return;
-        case "value":
-          if (val instanceof Integer)
-          {
-            onDialogReturn(((Integer) val).intValue());
-          }
-          else
-          {
-            onDialogReturn(val);
-          }
-          return;
-        }
-        break;
-      case "javax.swing.ColorChooserDialog":
-        switch (name)
-        {
-        case "SelectedColor":
-          onDialogReturn(val);
-          return;
-        }
-        break;
-      case "javax.swing.JFileChooser":
-        switch (name)
-        {
-        case "SelectedFile":
-          // in JavaScript, this File object will have a _bytes property,
-          // because the file data has already been loaded
-          onDialogReturn(new Object[] { (File) val });
-          return;
-        }
-        break;
-      }
-      System.out.println(event.getSource().getClass().getName() + " "
-              + event.getPropertyName() + ": " + event.getNewValue());
-    }
-
-    // JSCOmponent.DialogCaller interface
-    void onDialogReturn(Object value)
-    {
-      switch ((String) dialogData[0])
-      {
-      case "SelectedFile":
-      case "runnable":
-        dialogData[0] = value;
-        ((Runnable) dialogData[1]).run();
-        break;
-      case "label.select_feature_colour":
-        ((FeatureRenderer) dialogData[1]).processColorDialog((Color) value);
-        break;
-      }
-    }
-
-    // JSCOmponent.DialogCaller interface
-    void onDialogReturn(int value)
-    {
-      if (value != Math.floor(value))
-      {
-        // in JavaScript, this will be NaN, oddly enough
-        return;
-      }
-
-      switch ((String) dialogData[0])
-      {
-      case "runnable":
-        dialogData[0] = Integer.valueOf(value);
-        ((Runnable) dialogData[1]).run();
-        break;
-      case "label.input_alignment_from_url":
-        // reconstruct the parameter data
-        int reply = value;
-        AlignViewport viewport = (AlignViewport) dialogData[1];
-        JComboBox history = (JComboBox) dialogData[2];
-        // the rest of this is unchangaed
-        if (reply != JvOptionPane.OK_OPTION)
-        {
-          return;
-        }
-
-        String url = history.getSelectedItem().toString();
-
-        if (url.toLowerCase().endsWith(".jar"))
-        {
-          if (viewport != null)
-          {
-            new FileLoader().LoadFile(viewport, url, DataSourceType.URL,
-                    FileFormat.Jalview);
-          }
-          else
-          {
-            new FileLoader().LoadFile(url, DataSourceType.URL,
-                    FileFormat.Jalview);
-          }
-        }
-        else
-        {
-          FileFormatI format = null;
-          try
-          {
-            format = new IdentifyFile().identify(url, DataSourceType.URL);
-          } catch (FileFormatException e)
-          {
-            // TODO revise error handling, distinguish between
-            // URL not found and response not valid
-          }
-
-          if (format == null)
-          {
-            JvOptionPane.showInternalMessageDialog(Desktop.desktop,
-                    MessageManager.formatMessage("label.couldnt_locate",
-                            new Object[]
-                            { url }),
-                    MessageManager.getString("label.url_not_found"),
-                    JvOptionPane.WARNING_MESSAGE);
-
-            return;
-          }
-
-          if (viewport != null)
-          {
-            new FileLoader().LoadFile(viewport, url, DataSourceType.URL,
-                    format);
-          }
-          else
-          {
-            new FileLoader().LoadFile(url, DataSourceType.URL, format);
-          }
-        }
-
-        break;
-      }
-
-    }
-
     private static final float ONE_MB = 1048576f;
 
     boolean showMemoryUsage = false;
@@ -3308,28 +3222,39 @@ public class Desktop extends jalview.jbgui.GDesktop
     block.release();
   }
 
+  /**
+   * Outputs an image of the desktop to file in EPS format, after prompting the
+   * user for choice of Text or Lineart character rendering (unless a preference
+   * has been set). The file name is generated as
+   * 
+   * <pre>
+   * Jalview_snapshot_nnnnn.eps where nnnnn is the current timestamp in milliseconds
+   * </pre>
+   */
   @Override
   protected void snapShotWindow_actionPerformed(ActionEvent e)
   {
+    // currently the menu option to do this is not shown
     invalidate();
-    File of;
-    ImageMaker im = new jalview.util.ImageMaker(
-            this, ImageMaker.TYPE.EPS, "View of Desktop", getWidth(),
-            getHeight(), of = new File("Jalview_snapshot"
-                    + System.currentTimeMillis() + ".eps"),
-            "View of desktop", null, 0, false);
-    try
-    {
-      paintAll(im.getGraphics());
-      im.writeImage();
-    } catch (Exception q)
+
+    int width = getWidth();
+    int height = getHeight();
+    File of = new File(
+            "Jalview_snapshot_" + System.currentTimeMillis() + ".eps");
+    ImageWriterI writer = new ImageWriterI()
     {
-      Cache.log.error("Couldn't write snapshot to " + of.getAbsolutePath(),
-              q);
-      return;
-    }
-    Cache.log.info("Successfully written snapshot to file "
-            + of.getAbsolutePath());
+      @Override
+      public void exportImage(Graphics g) throws Exception
+      {
+        paintAll(g);
+        Cache.log.info("Successfully written snapshot to file "
+                + of.getAbsolutePath());
+      }
+    };
+    String title = "View of desktop";
+    ImageExporter exporter = new ImageExporter(writer, null, TYPE.EPS,
+            title);
+    exporter.doExport(of, this, width, height, title);
   }
 
   /**