[英]How to show graph on JFrame
我有一个JPanel来创建一个不可编辑的图形。
如图所示,边缘名称被JFrame的边界覆盖。
如何显示边缘名称而不被JFrame覆盖?
package myapp;
import java.awt.BorderLayout;
import javax.swing.JFrame;
import com.mxgraph.layout.mxIGraphLayout;
import com.mxgraph.layout.hierarchical.mxHierarchicalLayout;
import com.mxgraph.model.mxICell;
import com.mxgraph.swing.mxGraphComponent;
import com.mxgraph.view.mxGraph;
public class CreateGraph extends JFrame {
private static final long serialVersionUID = 8083868183987456695L;
mxICell a, b, c, d, e, f, g, h;
public CreateGraph() {
final mxGraph graph = new mxGraph();
Object parent = graph.getDefaultParent();
graph.getModel().beginUpdate();
try {
a = (mxICell) graph.insertVertex(parent, null, "a", 0, 0, 80, 30);
b = (mxICell) graph.insertVertex(parent, null, "b", 0, 0, 80, 30);
c = (mxICell) graph.insertVertex(parent, null, "c", 0, 0, 80, 30);
d = (mxICell) graph.insertVertex(parent, null, "d", 0, 0, 80, 30);
graph.insertEdge(parent, null, "ab", a, b);
graph.insertEdge(parent, null, "bc", b, c);
graph.insertEdge(parent, null, "cd", c, b);
graph.insertEdge(parent, null, "cd", c, d);
graph.insertEdge(parent, null, "da", d, a);
graph.setCellsEditable(false);
graph.setCellsMovable(false);
graph.setCellsSelectable(false);
} finally {
graph.getModel().endUpdate();
}
// define layout
mxIGraphLayout layout = new mxHierarchicalLayout(graph);
layout.execute(graph.getDefaultParent());
mxGraphComponent graphComponent = new mxGraphComponent(graph);
getContentPane().setLayout(new BorderLayout());
getContentPane().add(graphComponent, BorderLayout.CENTER);
}
public static void main(String[] args) {
CreateGraph frame = new CreateGraph();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(800, 600);
frame.setVisible(true);
}
}
也许不想使用BorderLayout
,因为您并没有像How to Use BorderLayout或Border Layout这样的用例。
您的边缘位于布局内的X位置0。
一种选择是使用JGraph
本身解决问题,方法是添加一个常量,如private final double X_OFFSET = 10
,然后将其添加到每个graph
操作的X坐标。
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