我正在玩JUNG库,我想创建一个图表,其节点是一些gui(大概是jframe)项目。
我希望每个节点都有几个按钮,一个文本字段,菜单等。
我的问题是:这可能吗?
如果是,我还有两个问题: 1.我应该如何处理它(我是Java新手,我不熟悉最佳实践) 2.我应该使用什么界面(我正在查看.visualisation.decorators。* currenlty)。
提前谢谢。
答案 0 :(得分:1)
好的,最终我成功创建了JPanels和JFrames的图表。我将继续使用JPanels。这是结果:
但现在我还面临一些其他问题:
可以移动帧,但只有在左上角拾取帧时才能移动。如何使整个JPanel区域可以选择?
我需要可以访问JPanel,例如我应该能够按下按钮,在文本框中写入一些文本(这尚未实现),并可能调整JPanel的大小。目前,JPanels"不活跃/没有焦点"由于某些原因。我尝试了启用方法,没有成功。试过一些"焦点"方法,再次失败。
对上述两个问题的任何建议?
以下是我的代码的样子:
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.geom.Point2D;
import javax.swing.BorderFactory;
import javax.swing.CellRendererPane;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import edu.uci.ics.jung.algorithms.layout.CircleLayout;
import edu.uci.ics.jung.algorithms.layout.Layout;
import edu.uci.ics.jung.graph.DirectedSparseGraph;
import edu.uci.ics.jung.visualization.RenderContext;
import edu.uci.ics.jung.visualization.VisualizationViewer;
import edu.uci.ics.jung.visualization.control.DefaultModalGraphMouse;
import edu.uci.ics.jung.visualization.control.ModalGraphMouse;
import edu.uci.ics.jung.visualization.picking.PickedState;
import edu.uci.ics.jung.visualization.renderers.Renderer;
import edu.uci.ics.jung.visualization.transform.shape.GraphicsDecorator;
public class GraphPanel extends Container
{
static final long serialVersionUID = 420001L;
DirectedSparseGraph<Number, Number> graph = null;
VisualizationViewer<Number, Number> vv = null;
PickedState<Number> pickedState = null;
public GraphPanel(Number[][] nodes_list)
{
try
{
graph = new DirectedSparseGraph<Number, Number>();
construct_graph(nodes_list);
vv = new VisualizationViewer<Number, Number>
(new CircleLayout<Number, Number>(graph), new Dimension(400, 400));
vv.getRenderer().setVertexRenderer(new MyRenderer());
// The vertex pick listener
pickedState = vv.getPickedVertexState();
pickedState.addItemListener(new ItemListener()
{
@Override
public void itemStateChanged(ItemEvent e)
{
Object subject = e.getItem();
if (subject instanceof Number)
{
Number vertex = (Number) subject;
if (pickedState.isPicked(vertex))
{
System.out.println("Vertex " + vertex + " is now selected");
}
else
{
System.out.println("Vertex " + vertex + " no longer selected");
}
}
}
});
// The following code adds capability for mouse picking of
// vertices/edges. Vertices can even be moved!
final DefaultModalGraphMouse<Number, Number> graphMouse = new DefaultModalGraphMouse<Number, Number>();
vv.setGraphMouse(graphMouse);
graphMouse.setMode(ModalGraphMouse.Mode.PICKING);
}
catch (Exception e)
{
System.err.println("Failed to construct graph!\n");
System.err.println("Caught Exception: " + e.getMessage());
}
}
/*Attach the graph panel/container to a specified frame*/
public void attach_to_frame(JFrame frame)
{
frame.setContentPane(vv);
}
/*This one should be reimplemented*/
private void construct_graph(Number[][] nodes_list)
{
int i = 0;
/*add the nodes*/
for(i=0; i<nodes_list.length; i++)
{
graph.addVertex(i);
graph.addEdge(nodes_list[i][0], nodes_list[i][1], nodes_list[i][2]);
}
}
/*re-implement the render functionality to work with internal frames(JInternalFrame)*/
static class MyRenderer extends JPanel implements Renderer.Vertex<Number, Number>
{
static final long serialVersionUID = 420000L;
@Override
public void paintVertex(RenderContext<Number, Number> rc,
Layout<Number, Number> layout, Number vertex)
{
try
{
GraphicsDecorator graphicsContext = rc.getGraphicsContext();
Point2D center = layout.transform(vertex);
Dimension size = new Dimension(100, 80);
System.out.printf("Vertex[%d] X = %d Y = %d: Running paintVertex()\n", vertex, (int)center.getX(), (int)center.getY());
JPanel sv = new JPanel();
sv.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
sv.setBackground(Color.GREEN);
sv.setPreferredSize(size);
sv.add(new JButton("Button1"));
//OK
graphicsContext.draw(sv, rc.getRendererPane(), (int)center.getX(),
(int)center.getY(), size.width, size.height, true);
}
catch (Exception e)
{
System.err.println("Failed to render images!\n");
System.err.println("Caught Exception: " + e.getMessage());
}
}
}
public static void main(String[] args)
{
/*Create the window*/
JFrame frame = new JFrame("BLABLA");
Number[][] list = {{0, 1, 3}, {1, 3, 1}, {2, 2, 3}, {3, 2, 0}};
GraphPanel g = new GraphPanel(list);
g.attach_to_frame(frame);
frame.getContentPane().setPreferredSize(new Dimension(640, 480));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
}/*2*/
答案 1 :(得分:0)
是的,有可能(我认为)。我建议你将VertexLabeler改为你自己实现的。有些东西......
VisualizationImageServer<V, E> vv = new ...;
vv.getRenderContext().setVertexLabelRenderer(new MyVertexRenderer());
class MyVertexRenderer extends JFrame implements VertexLabelRenderer {}
但是我不确定它在以后的定位方面会起作用。您可能需要更改VertexShapeTransofrmer
以及vv.getRenderContext().setVertexShapeTransformer()
。
我必须说,我花了很多时间试图让Jung像graphviz那样很好地渲染图形,但收效甚微。