我完成了我的作业，并在谷歌搜索了一个样本和一个在stackoverflow之前回答的主题。但是没有找到任何东西。
我的问题是没有箭头视图的普通边缘。
以下是我希望从目标到目的地的前进箭头：
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);
以下是我看到的边缘颜色，希望它们不能透明：
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 colour = new ActionList();
colour.add(fill);
colour.add(text);
colour.add(edges);
colour.add(arrow);
vis.putAction("colour", colour);
因此，我想知道我错在哪里？ 为什么我的边缘看起来不像箭头？
感谢您的任何想法。
有关详细信息，我想粘贴所有代码：
/*
* To change this template, choose Tools | Templates
* 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
// colour palette for nominal data type
int[] palette = new int[]{ColorLib.rgb(255, 180, 180), ColorLib.rgb(190, 190, 255)};
/* ColorLib.rgb converts the colour values to integers */
// map data to colours in the palette
DataColorAction fill = new DataColorAction("socialnet.nodes", "gender", Constants.NOMINAL, VisualItem.FILLCOLOR, palette);
/* fill describes what colour 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 colour 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 colour to draw the edges */
// combine the colour assignments into an action list
ActionList colour = new ActionList();
colour.add(fill);
colour.add(text);
colour.add(edges);
colour.add(arrow);
vis.putAction("colour", colour);
/* add the colour 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("colour");
vis.run("layout");
}
}
答案 0 :(得分：2)
如果您对prefuse论坛中给出的答案感到满意，我不确定您的评论。因此，我玩了代码，并且以下更改能够获得您想要的行为。
我更改了输入xml，以便图元素的edgedefault被定向。
... <graph edgedefault="directed"> ...
然后在代码中我使用不同的EdgeRenderer边缘类型和箭头类型来确保我可以打开和关闭箭头，或让它们向前或向后显示。我也试过弯曲的线条。例如：
edgeRenderer = new EdgeRenderer(prefuse.Constants.EDGE_TYPE_CURVE, prefuse.Constants.EDGE_ARROW_FORWARD);
同样，您可能已经在其他论坛中得到了答案。
答案 1 :(得分：0)
ColorAction arrowColor = new ColorAction("tree.edges", VisualItem.FILLCOLOR, ColorLib.gray(200));
以及下面的内容：
// create the filtering and layout:
[...]
filter.add(arrowColor); // add this one
基本上，答案是在sourceforge线程中，但我想在这里提供一个解决方案。 merve中的代码包含这些指令。