I did my homework and searched for both google for the sample and the topic that was answered earlier in stackoverflow. But nothing was found.
My problem is regular edges that don't have a look like arrows.
Here is what I do to hope that there are arrows forward from target to target:
LabelRenderer nameLabel = new LabelRenderer ("name");
nameLabel.setRoundedCorner (8, 8);
DefaultRendererFactory rendererFactory = new DefaultRendererFactory (nameLabel);
EdgeRenderer edgeRenderer;
edgeRenderer = new EdgeRenderer (prefuse.Constants.EDGE_TYPE_LINE, prefuse.Constants.EDGE_ARROW_FORWARD);
rendererFactory.setDefaultEdgeRenderer (edgeRenderer);
vis.setRendererFactory (rendererFactory);
Here is what I see about the color of the ribs, hoping that they should not be transparent:
int [] palette = new int [] {ColorLib.rgb (255, 180, 180), ColorLib.rgb (190, 190, 255)};
DataColorAction fill = new DataColorAction ("socialnet.nodes", "gender", Constants.NOMINAL, VisualItem.FILLCOLOR, palette);
ColorAction text = new ColorAction ("socialnet.nodes", VisualItem.TEXTCOLOR, ColorLib.gray (0));
ColorAction edges = new ColorAction ("socialnet.edges", VisualItem.STROKECOLOR, ColorLib.gray (200));
ColorAction arrow = new ColorAction ("socialnet.edges", VisualItem.FILLCOLOR, ColorLib.gray (200));
ActionList color = new ActionList ();
color.add (fill);
color.add (text);
color.add (edges);
colour.add (arrow);
vis.putAction ("color", color);
So I wonder where I am going wrong? Why don't my edges look like arrows?
Thanks for any idea.
For more details, I want to insert all the code:
/ *
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* and open the template in the editor.
* /
package prefusedeneme;
import javax.swing.JFrame;
import prefuse.data. *;
import prefuse.data.io. *;
import prefuse.Display;
import prefuse.Visualization;
import prefuse.render. *;
import prefuse.util. *;
import prefuse.action.assignment. *;
import prefuse.Constants;
import prefuse.visual. *;
import prefuse.action. *;
import prefuse.activity. *;
import prefuse.action.layout.graph. *;
import prefuse.controls. *;
import prefuse.data.expression.Predicate;
import prefuse.data.expression.parser.ExpressionParser;
public class SocialNetworkVis {
public static void main (String argv []) {
// 1. Load the data
Graph graph = null;
/ * graph will contain the core data * /
try {
graph = new GraphMLReader (). readGraph ("socialnet.xml");
/ * load the data from an XML file * /
} catch (DataIOException e) {
e.printStackTrace ();
System.err.println ("Error loading graph. Exiting ...");
System.exit (1);
}
// 2. prepare the visualization
Visualization vis = new Visualization ();
/ * vis is the main object that will run the visualization * /
vis.add ("socialnet", graph);
/ * add our data to the visualization * /
// 3. setup the renderers and the render factory
// labels for name
LabelRenderer nameLabel = new LabelRenderer ("name");
nameLabel.setRoundedCorner (8, 8);
/ * nameLabel decribes how to draw the data elements labeled as "name" * /
// create the render factory
DefaultRendererFactory rendererFactory = new DefaultRendererFactory (nameLabel);
EdgeRenderer edgeRenderer;
edgeRenderer = new EdgeRenderer (prefuse.Constants.EDGE_TYPE_LINE, prefuse.Constants.EDGE_ARROW_FORWARD);
rendererFactory.setDefaultEdgeRenderer (edgeRenderer);
vis.setRendererFactory (rendererFactory);
// 4. process the actions
// color palette for nominal data type
int [] palette = new int [] {ColorLib.rgb (255, 180, 180), ColorLib.rgb (190, 190, 255)};
/ * ColorLib.rgb converts the color values to integers * /
// map data to colors in the palette
DataColorAction fill = new DataColorAction ("socialnet.nodes", "gender", Constants.NOMINAL, VisualItem.FILLCOLOR, palette);
/ * fill describes what color to draw the graph based on a portion of the data * /
// node text
ColorAction text = new ColorAction ("socialnet.nodes", VisualItem.TEXTCOLOR, ColorLib.gray (0));
/ * text describes what color to draw the text * /
// edge
ColorAction edges = new ColorAction ("socialnet.edges", VisualItem.STROKECOLOR, ColorLib.gray (200));
ColorAction arrow = new ColorAction ("socialnet.edges", VisualItem.FILLCOLOR, ColorLib.gray (200));
/ * edge describes what color to draw the edges * /
// combine the color assignments into an action list
ActionList color = new ActionList ();
color.add (fill);
color.add (text);
color.add (edges);
colour.add (arrow);
vis.putAction ("color", color);
/ * add the color actions to the visualization * /
// create a separate action list for the layout
ActionList layout = new ActionList (Activity.INFINITY);
layout.add (new ForceDirectedLayout ("socialnet"));
/ * use a force-directed graph layout with default parameters * /
layout.add (new RepaintAction ());
/ * repaint after each movement of the graph nodes * /
vis.putAction ("layout", layout);
/ * add the laout actions to the visualization * /
// 5. add interactive controls for visualization
Display display = new Display (vis);
display.setSize (700, 700);
display.pan (350, 350); // pan to the middle
display.addControlListener (new DragControl ());
/ * allow items to be dragged around * /
display.addControlListener (new PanControl ());
/ * allow the display to be panned (moved left / right, up / down) (left-drag) * /
display.addControlListener (new ZoomControl ());
/ * allow the display to be zoomed (right-drag) * /
// 6. launch the visualizer in a JFrame
JFrame frame = new JFrame ("prefuse tutorial: socialnet");
/ * frame is the main window * /
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
frame.add (display);
/ * add the display (which holds the visualization) to the window * /
frame.pack ();
frame.setVisible (true);
/ * start the visualization working * /
vis.run ("color");
vis.run ("layout");
}
}