Jung可视化中的顶点标签颜色 [英] Vertex label color in Jung visualization
问题描述
我已经用Jung创建了一个图形，并且正在研究可视化选项.我正在尝试更改顶点标签的颜色，不在乎是否从一开始就选择/未选择它们.
I've created a graph with Jung and I'm looking into visualization options. I'm trying to change the color of the vertex labels, don't care if they are picked/unpicked, just from the get-go.
即我想将顶点标签涂成白色，将边缘标签涂成黑色(默认).
I.e. I want to paint the vertex labels white, leave edge labels black (default).
似乎找不到有效的示例，DefaultVertexLabelRenderer类应该可以帮到我，但我似乎无法使其正常工作.有任何想法吗?当前代码如下:
Can't seem to find a sample that works, the DefaultVertexLabelRenderer class should help I guess but I can't seem to get it to work. Any ideas? The code currently looks like this:
public static void main(String[] args) {
Graph<Node, Double> g = MakeGraph.makeManual(); //graph created somewhere
Layout<Node, Double> layout = new CircleLayout<Node, Double>(g);
layout.setSize(new Dimension(300,300));
VisualizationViewer<Node, Double> vv = new VisualizationViewer<Node, Double>(layout);
vv.setPreferredSize(new Dimension(500,500));
// Paints the vertex (as a shape)
Transformer<Node,Paint> vertexPaint = new Transformer<Node,Paint>() {
public Paint transform(Node node) {
if(node.getNodeType().equals(NodeType.SLA)) return new Color(228,108,10);//Color.ORANGE;
else return new Color(79,129,189);//Color.BLUE;
}
};
//Wanna do this: paint the label text
Transformer<Node,Paint> vertexLabelPaint = new Transformer<Node,Paint>() {
public Paint transform(Node node) {
return Color.WHITE;
}
};
//Sets the vertex label font
Transformer<Node,Font> vertexFont = new Transformer<Node,Font>() {
public Font transform(Node node) {
Font font = new Font("Calibri", Font.BOLD, 14);
return font;
}
};
//Sets the vertex shape's size, w.r.t. to the size of the text in the label
Transformer<Node,Shape> vertexSize = new Transformer<Node,Shape>(){
public Shape transform(Node node){
Ellipse2D circle = new Ellipse2D.Double(-15, -15, 30, 30);
AffineTransform affinetransform = new AffineTransform();
FontRenderContext frc = new FontRenderContext(affinetransform,true,true);
Font font = new Font("Calibri", Font.BOLD, 14);
int textwidth = (int)(font.getStringBounds(node.toString(), frc).getWidth());
return AffineTransform.getScaleInstance(textwidth/14, 1).createTransformedShape(circle);
}
};
vv.getRenderContext().setVertexLabelRenderer(new DefaultVertexLabelRenderer(Color.WHITE));
vv.getRenderContext().setVertexFillPaintTransformer(vertexPaint); //fill
vv.getRenderContext().setVertexDrawPaintTransformer(vertexPaint); //outline
vv.getRenderContext().setVertexFontTransformer(vertexFont);
vv.getRenderContext().setVertexLabelTransformer(new ToStringLabeller<Node>());
//COLOR ME WHITE! ^^
vv.getRenderContext().setVertexShapeTransformer(vertexSize);
vv.getRenderer().getVertexLabelRenderer().setPosition(Position.CNTR);
vv.getRenderContext().setEdgeLabelTransformer(new ToStringLabeller<Double>());
//LEAVE ME BLACK ^^
DefaultModalGraphMouse<Node, Double> gm = new DefaultModalGraphMouse<Node, Double>();
// gm.setMode(ModalGraphMouse.Mode.TRANSFORMING);
vv.setGraphMouse(gm);
JFrame frame = new JFrame("Test Graph");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(vv);
frame.pack();
frame.setVisible(true);
}}
我尝试了
DefaultVertexLabelRenderer dvlr = new DefaultVertexLabelRenderer(Color.WHITE);
dvlr.setForeground(Color.WHITE);
vv.getRenderContext().setVertexLabelRenderer(dvlr);
无济于事.
推荐答案
一个选项是重写方法，该方法返回标签的渲染器组件，并相应地设置前景色.在这里，这是通过 MCVE 实现的(当 question 中已经提供了该功能时，快速尝试并找到解决方案要容易得多...)
One option is to override the method that returns the renderer component for the labels, and sets the foreground color accordingly. Here this is implemented as a MCVE (which, when it is already provided in the question, makes it much easier to quickly try it out and find a solution...)
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import javax.swing.JComponent;
import javax.swing.JFrame;
import edu.uci.ics.jung.algorithms.layout.FRLayout;
import edu.uci.ics.jung.graph.DirectedSparseGraph;
import edu.uci.ics.jung.graph.Graph;
import edu.uci.ics.jung.visualization.VisualizationViewer;
import edu.uci.ics.jung.visualization.control.DefaultModalGraphMouse;
import edu.uci.ics.jung.visualization.decorators.ToStringLabeller;
import edu.uci.ics.jung.visualization.renderers.DefaultVertexLabelRenderer;
public class JungVertexLabelColors
{
public static void main(String[] args)
{
JFrame jf = new JFrame();
final Graph<String, String> g = getGraph();
final VisualizationViewer<String, String> vv =
new VisualizationViewer<String, String>(
new FRLayout<String, String>(g));
DefaultModalGraphMouse<Node, Double> graphMouse =
new DefaultModalGraphMouse<Node, Double>();
vv.setGraphMouse(graphMouse);
final Color vertexLabelColor = Color.RED;
DefaultVertexLabelRenderer vertexLabelRenderer =
new DefaultVertexLabelRenderer(vertexLabelColor)
{
@Override
public <V> Component getVertexLabelRendererComponent(
JComponent vv, Object value, Font font,
boolean isSelected, V vertex)
{
super.getVertexLabelRendererComponent(
vv, value, font, isSelected, vertex);
setForeground(vertexLabelColor);
return this;
}
};
vv.getRenderContext().setVertexLabelRenderer(vertexLabelRenderer);
vv.getRenderContext().setVertexLabelTransformer(new ToStringLabeller<String>());
jf.getContentPane().add(vv);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.pack();
jf.setVisible(true);
}
public static Graph<String, String> getGraph()
{
Graph<String, String> g = new DirectedSparseGraph<String, String>();
g.addVertex("v0");
g.addVertex("v1");
g.addVertex("v2");
g.addVertex("v3");
g.addVertex("v4");
g.addEdge("e0", "v0", "v1");
g.addEdge("e1", "v1", "v2");
g.addEdge("e2", "v2", "v3");
g.addEdge("e3", "v3", "v4");
g.addEdge("e4", "v4", "v0");
g.addEdge("e5", "v1", "v3");
g.addEdge("e6", "v2", "v4");
return g;
}
}
(确实有些奇怪，似乎没有更简单的方法，但是根据DefaultVertexLabelRenderer的实现，没有方法可以通过渲染器本身来影响默认标签颜色:它只是从VisualizationViewer.(因此visualizationViewer.setForeground(Color.RED)会更改颜色，但这会影响所有标签...))
(It's indeed a bit strange that there seems to be no easier way, but according to the implementation of DefaultVertexLabelRenderer, there is no way to influence the default label color with the renderer itself: It simply takes the foreground color from the VisualizationViewer. (So visualizationViewer.setForeground(Color.RED) would change the color, but this would affect all labels...))
这篇关于Jung可视化中的顶点标签颜色的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
