我使用JUNG(Java通用网络/图形框架)构建了一个图形,代码如下:
g = new SparseMultigraph<BusStop, Travel>();
//add some Vertex and Edges
Layout<String, String> layout1 = new CircleLayout(g);
layout1.setSize(new Dimension(300,300)); // sets the initial size of the layout space
VisualizationViewer vv = new VisualizationViewer(layout1);
vv.setPreferredSize(new Dimension(350,350)); //Sets the viewing area size
Transformer<BusStop,Paint> vertexPaint = new Transformer<BusStop,Paint>() {
public Paint transform(BusStop b) {
return Color.GREEN;
}
};
Transformer<BusStop,Shape> vertexShape = new Transformer<BusStop,Shape>() {
public Shape transform(BusStop b) {
return new Rectangle(-20, -10, 40, 20);
}
};
vv.getRenderContext().setVertexFillPaintTransformer(vertexPaint);
vv.getRenderContext().setVertexShapeTransformer(vertexShape);
vv.getRenderContext().setVertexLabelTransformer(new ToStringLabeller());
vv.getRenderer().getVertexLabelRenderer().setPosition(Position.CNTR);
GraphViewerForm = new edu.uci.ics.jung.visualization.GraphZoomScrollPane(vv);
现在,我想要向图形中添加更多的顶点和边缘,我该怎么做?为了重新绘制图形,我应该运行哪些指令?谢谢!