/**
* Basic Graph Visualization — code based on examples from Grappa 1.4
* by John Mocenigo
* http://www2.research.att.com/~john/Grappa/
*
* Note: autolayout has been disabled so programs must pass the filename
* of a pre-formatted file (see Graph.genFormatDotFile(…))
*
* @author Scott Sanner (ssanner@gmail.com)
* @version 11/29/04
*
**/
package graph.gviz;
import java.awt.*;
import java.awt.geom.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import javax.swing.*;
import att.grappa.*;
public abstract class DotViewer
implements GrappaConstants
{
public int width = 600;
public int height = 400;
public int x_offset = 100;
public int y_offset = 100;
public int text_height = 75;
static {
// JFrame.setDefaultLookAndFeelDecorated(true);
}
public DotViewerFrame frame = null;
public DotViewer() {
// Initially use defaults for window sizing
}
public void setWindowSizing(int w, int h, int x_off, int y_off, int text_h) {
width = w;
height = h;
x_offset = x_off;
y_offset = y_off;
text_height = text_h;
}
// Must override
public abstract void nodeClicked(String name);
public void showWindow(String filename) {
FileInputStream input = null;
try {
input = new FileInputStream(filename);
} catch(FileNotFoundException fnf) {
System.out.println(fnf.toString());
System.exit(1);
}
//System.out.println(“Displaying: ‘” + filename + “‘”);
showWindow(input);
}
public void showWindow(InputStream input) {
Parser program = new Parser(input,System.err);
try {
program.parse();
} catch(Exception ex) {
System.err.println(“Exception: ” + ex.getMessage());
ex.printStackTrace(System.err);
System.exit(1);
}
Graph graph = null;
graph = program.getGraph();
graph.setEditable(true);
graph.setErrorWriter(new PrintWriter(System.err,true));
frame = new DotViewerFrame(graph, this, width, height, x_offset, y_offset, text_height);
frame.show();
frame.repaint();
}
public void displayText(String msg) {
frame.displayText(msg);
}
public static class ZoomAdapter extends GrappaAdapter {
GrappaPanel gp;
DotViewerFrame dvf;
GrappaBox last_outline = null;
public ZoomAdapter(GrappaPanel panel, DotViewerFrame frame) {
gp = panel;
dvf = frame;
}
// The method called when a single mouse click occurs on a displayed subgraph.
public void grappaClicked(Subgraph subg, Element elem, GrappaPoint pt, int modifiers,
int clickCount, GrappaPanel panel) {
if (clickCount == 2) {
gp.setScaleToFit(true);
//System.out.println(“Zoom reset”);
gp.resetZoom();
gp.repaint();
}
if (elem instanceof Node && dvf != null) {
String name = ((Node)elem).toString();
name = name.substring(1,name.length()-1);
dvf.dv.nodeClicked(name);
}
}
// The method called when a mouse drag occurs on a displayed subgraph.
public void grappaDragged(Subgraph subg, GrappaPoint currentPt, int currentModifiers, Element pressedElem,
GrappaPoint pressedPt, int pressedModifiers, GrappaBox outline, GrappaPanel panel) {
if((currentModifiers&InputEvent.BUTTON1_MASK) == InputEvent.BUTTON1_MASK) {
if(currentModifiers == InputEvent.BUTTON1_MASK || currentModifiers == (InputEvent.BUTTON1_MASK|InputEvent.CTRL_MASK)) {
Graphics2D g2d = (Graphics2D)(panel.getGraphics());
AffineTransform orig = g2d.getTransform();
g2d.setTransform(panel.getTransform());
g2d.setXORMode(Color.darkGray);
if(outline != null) {
g2d.draw(outline);
}
GrappaBox box = GrappaSupport.boxFromCorners(pressedPt.x, pressedPt.y, currentPt.x, currentPt.y);
g2d.draw(box);
g2d.setPaintMode();
g2d.setTransform(orig);
}
}
last_outline = outline;
}
// The method called when a mouse press occurs on a displayed subgraph.
public void grappaPressed(Subgraph subg, Element elem, GrappaPoint pt, int modifiers, GrappaPanel panel) {
}
// The method called when a mouse release occurs on a displayed subgraph.
public void grappaReleased(Subgraph subg, Element elem, GrappaPoint pt, int modifiers, Element pressedElem,
GrappaPoint pressedPt, int pressedModifiers, GrappaBox outline, GrappaPanel panel) {
//System.out.println(“Zoom Outline”);
//System.out.flush();
gp.setScaleToFit(false);
gp.setScaleToSize(null);
gp.zoomToOutline(outline);
gp.repaint();
}
// The method called when a element tooltip is needed.
public String grappaTip(Subgraph subg, Element elem, GrappaPoint pt, int modifiers, GrappaPanel panel) {
return null; // “No tip”;
}
}
public static class DotViewerFrame extends JFrame implements ActionListener
{
DotViewer dv = null;
JButton layout = null;
JTextPane jta = null;
GrappaPanel gp = null;
GrappaAdapter ga = null;
Graph graph = null;
JButton printer = null;
JButton redraw = null;
JButton quit = null;
JButton zoom_reset = null;
JButton zoom_two = null;
JButton zoom_half = null;
JPanel panel = null;
public DotViewerFrame(Graph graph, DotViewer dot_viewer,
int width, int height, int offset_x, int offset_y,
int text_height) {
super(“Graph Viewer”);
dv = dot_viewer;
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
this.graph = graph;
setSize(width,height);
setLocation(offset_x,offset_y);
JScrollPane jsp = new JScrollPane();
jsp.setSize(width,height);
//jsp.setMinimumSize(new Dimension(width,height));
//jsp.setPreferredSize(new Dimension(width,height));
//jsp.getViewport().setScrollMode(JViewport.BACKINGSTORE_SCROLL_MODE);
jsp.getViewport().setScrollMode(JViewport.BLIT_SCROLL_MODE);
jsp.getViewport().setBackground(Color.white);
gp = MakeGrappaPanel(graph, this);
java.awt.Rectangle bbox = graph.getBoundingBox().getBounds();
GridBagLayout gbl = new GridBagLayout();
GridBagConstraints gbc = new GridBagConstraints();
GridBagConstraints gbcr = new GridBagConstraints();
gbcr.fill = gbc.fill = GridBagConstraints.HORIZONTAL;
gbcr.anchor = gbc.anchor = GridBagConstraints.NORTHWEST;
gbcr.gridwidth = GridBagConstraints.REMAINDER;
panel = new JPanel();
panel.setLayout(gbl);
redraw = new JButton(“Redraw”);
gbl.setConstraints(redraw,gbc);
panel.add(redraw);
redraw.addActionListener(this);
zoom_reset = new JButton(“Zoom Reset”);
gbl.setConstraints(zoom_reset,gbc);
panel.add(zoom_reset);
zoom_reset.addActionListener(this);
zoom_two = new JButton(“Zoom 2x”);
gbl.setConstraints(zoom_two,gbc);
panel.add(zoom_two);
zoom_two.addActionListener(this);
zoom_half = new JButton(“Zoom 1/2x”);
gbl.setConstraints(zoom_half,gbc);
panel.add(zoom_half);
zoom_half.addActionListener(this);
printer = new JButton(“Save”);
gbl.setConstraints(printer,gbc);
panel.add(printer);
printer.addActionListener(this);
quit = new JButton(“Close”);
gbl.setConstraints(quit,gbc);
panel.add(quit);
quit.addActionListener(this);
JPanel empty = new JPanel();
gbl.setConstraints(empty,gbcr);
panel.add(empty);
jta = new JTextPane();
if (text_height > 0) {
jta.setText(“Click on a node for more information.”);
Dimension jta_dim = new Dimension(width, text_height);
jta.setSize(width, text_height);
jta.setPreferredSize(jta_dim);
jta.setMinimumSize(jta_dim);
//jta.setRows(5);
jta.setEditable(false);
jta.setBackground(Color.white);
gbl.setConstraints(jta,gbcr);
panel.add(jta);
//jta.addActionListener(this);
}
//GridBagLayout gbl2 = new GridBagLayout();
//GridBagConstraints gbc2 = new GridBagConstraints();
//gbc2.fill = GridBagConstraints.VERTICAL;
//gbc2.anchor = GridBagConstraints.NORTHWEST;
//gbc2.gridwidth = GridBagConstraints.REMAINDER;
//JPanel p = new JPanel();
//p.setLayout(gbl2);
//gbl2.setConstraints(panel, gbc2);
//p.add(panel);
//gbl2.setConstraints(jsp, gbc2);
//p.add(jsp);
//getContentPane().add(“Center”, p);
getContentPane().add(“North”, panel);
getContentPane().add(“Center”, jsp);
//autoLayout();
setVisible(true);
jsp.setViewportView(gp);
}
public static GrappaPanel MakeGrappaPanel(Graph graph, DotViewerFrame dvf) {
GrappaPanel gp = new GrappaPanel(graph);
GrappaAdapter ga = new ZoomAdapter(gp, dvf);
gp.addGrappaListener(ga);
gp.setScaleToFit(true);
return gp;
}
public void displayText(String msg) {
jta.setText(msg);
}
public void actionPerformed(ActionEvent evt) {
if(evt.getSource() instanceof JButton) {
JButton tgt = (JButton)evt.getSource();
if(tgt == quit) {
setVisible(false);
dispose();
} else if(tgt == printer) {
try {
FileDialog fd = new FileDialog(this,”Save file as …”,FileDialog.SAVE);
fd.show();
String filename = fd.getFile();
String dir = fd.getDirectory();
if (filename != null && dir != null) {
PrintStream ps = new PrintStream(new FileOutputStream(dir + filename));
graph.printGraph(ps);
ps.close();
}
} catch (FileNotFoundException ex) {
System.err.println(“File system error… could not write file.”);
}
System.out.flush();
} else if(tgt == redraw) {
gp.repaint();
} else if(tgt == zoom_reset) {
gp.setScaleToFit(true);
//System.out.println(“Zoom reset”);
gp.resetZoom();
gp.repaint();
} else if(tgt == zoom_half) {
//System.out.println(“Zoom 1/2x”);
//System.out.flush();
gp.setScaleToFit(false);
gp.setScaleToSize(null);
gp.multiplyScaleFactor(0.5d);
gp.repaint();
} else if(tgt == zoom_two) {
//System.out.println(“Zoom 2x”);
//System.out.flush();
gp.setScaleToFit(false);
gp.setScaleToSize(null);
gp.multiplyScaleFactor(2d);
gp.repaint();
} else {
System.out.println(“Unhandled button: ” + evt);
}
}
}
public void autoLayout() {
GraphFormat.LayoutGraph(graph);
gp.repaint();
}
}
}