我想在应用程序中绘制一些图形,包括顶点和边。我发现JGraph是一个用于绘制图形的好库。我浏览了一些有关它的在线资源,但是找不到有关如何在Swing应用程序中嵌入JGraph的任何相关文章。 (在JFrame
中显示JGraph等)。有人可以帮我吗?
最佳答案
这段代码对我有用:
// Insert the cells via the cache, so they get selected
graph.getGraphLayoutCache().insert(cells);
// Show in Frame
JFrame frame = new JFrame();
frame.getContentPane().add(new JScrollPane(graph));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
如果您需要整个样本,我也可以上传。
我认为代码必须是网站上的修改后示例。干得好:
import java.awt.Color;
import java.awt.geom.Rectangle2D;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import org.jgraph.JGraph;
import org.jgraph.graph.DefaultEdge;
import org.jgraph.graph.DefaultGraphCell;
import org.jgraph.graph.DefaultGraphModel;
import org.jgraph.graph.GraphConstants;
import org.jgraph.graph.GraphModel;
public class Foo {
public static void main(String[] args) {
// Construct Model and Graph
GraphModel model = new DefaultGraphModel();
JGraph graph = new JGraph(model);
// Control-drag should clone selection
graph.setCloneable(true);
// Enable edit without final RETURN keystroke
graph.setInvokesStopCellEditing(true);
// When over a cell, jump to its default port (we only have one, anyway)
graph.setJumpToDefaultPort(true);
// Insert all three cells in one call, so we need an array to store them
DefaultGraphCell[] cells = new DefaultGraphCell[3];
// Create Hello Vertex
cells[0] = createVertex("Hello", 20, 20, 40, 20, null, false );
// Create World Vertex
cells[1] = createVertex("World", 140, 140, 40, 20,
Color.ORANGE, true);
// Create Edge
DefaultEdge edge = new DefaultEdge("foo");
// Fetch the ports from the new vertices, and connect them with the edge
edge.setSource(cells[0].getChildAt(0));
edge.setTarget(cells[0].getChildAt(0));
cells[2] = edge;
// Create Edge
DefaultEdge edge1 = new DefaultEdge();
// Fetch the ports from the new vertices, and connect them with the edge
// cells[0].addPort();
// cells[1].addPort();
// edge1.setSource(cells[1]);
// edge1.setTarget(cells[0]);
// cells[3] = edge1;
// Set Arrow Style for edge
int arrow = GraphConstants.ARROW_CLASSIC;
GraphConstants.setLineEnd(edge.getAttributes(), arrow);
GraphConstants.setEndFill(edge.getAttributes(), true);
// Insert the cells via the cache, so they get selected
graph.getGraphLayoutCache().insert(cells);
// Show in Frame
JFrame frame = new JFrame();
frame.getContentPane().add(new JScrollPane(graph));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
public static DefaultGraphCell createVertex(String name, double x,
double y, double w, double h, Color bg, boolean raised) {
// Create vertex with the given name
DefaultGraphCell cell = new DefaultGraphCell(name);
// Set bounds
GraphConstants.setBounds(cell.getAttributes(),
new Rectangle2D.Double(x, y, w, h));
// Set fill color
if (bg != null) {
GraphConstants.setGradientColor(cell.getAttributes(), bg);
GraphConstants.setOpaque(cell.getAttributes(), true);
}
// Set raised border
if (raised) {
GraphConstants.setBorder(cell.getAttributes(),
BorderFactory.createRaisedBevelBorder());
} else // Set black border
{
GraphConstants.setBorderColor(cell.getAttributes(),
Color.black);
}
// Add a Floating Port
cell.addPort();
return cell;
}
}
这是一个非常简单的例子。我已经完成了一些复杂的数据库数据图表,但是最终使用了Jung2来更好地满足我的需求。