Prefuse示例圖部分在JPanel之外

Question

我想使用Prefuse來可視化圖形。 我按照他們的教程嘗試了他們的示例應用程序 它的源代碼可以在這里找到

但是，即使我只是復制完整代碼，結果圖也不會顯示在教程中。 只有一半可見，卡在JPanel的左上角。 它的某些部分缺失，因為它們必須在面板外顯示。 我嘗試了一些自己的圖表，但我仍然遇到同樣的現象。

我想這不是預期的行為，但我不知道在哪里尋找問題。 我不知道這是Swing（x）還是prefuse或者......的問題？

更新：這是修訂后的代碼。 我沒有從示例中做太多改變，只添加了trashgod建議的內容。

package visualise;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import prefuse.Constants;
import prefuse.Display;
import prefuse.Visualization;
import prefuse.action.ActionList;
import prefuse.action.RepaintAction;
import prefuse.action.assignment.ColorAction;
import prefuse.action.assignment.DataColorAction;
import prefuse.action.layout.graph.ForceDirectedLayout;
import prefuse.activity.Activity;
import prefuse.controls.DragControl;
import prefuse.controls.PanControl;
import prefuse.controls.ZoomControl;
import prefuse.data.Graph;
import prefuse.data.io.DataIOException;
import prefuse.data.io.GraphMLReader;
import prefuse.render.DefaultRendererFactory;
import prefuse.render.LabelRenderer;
import prefuse.util.ColorLib;
import prefuse.visual.VisualItem;

public class PrefuseExample {

public static void main(String[] argv) {
    SwingUtilities.invokeLater(new Runnable() {
        public void run() {
             // -- 1. load the data ------------------------------------------------

            // load the socialnet.xml file. it is assumed that the file can be
            // found at the root of the java classpath
            Graph graph = null;
            try {
                graph = new GraphMLReader().readGraph("../../resources/visualisation/prefuse/Prefuse-master/data/socialnet.xml");
            } catch ( DataIOException e ) {
                e.printStackTrace();
                System.err.println("Error loading graph. Exiting...");
                System.exit(1);
            }


            // -- 2. the visualization --------------------------------------------

            // add the graph to the visualization as the data group "graph"
            // nodes and edges are accessible as "graph.nodes" and "graph.edges"
            Visualization vis = new Visualization();
            vis.add("graph", graph);
            vis.setInteractive("graph.edges", null, false);

            // -- 3. the renderers and renderer factory ---------------------------

            // draw the "name" label for NodeItems
            LabelRenderer r = new LabelRenderer("name");
            r.setRoundedCorner(8, 8); // round the corners

            // create a new default renderer factory
            // return our name label renderer as the default for all non-EdgeItems
            // includes straight line edges for EdgeItems by default
            vis.setRendererFactory(new DefaultRendererFactory(r));


            // -- 4. the processing actions ---------------------------------------

            // create our nominal color palette
            // pink for females, baby blue for males
            int[] palette = new int[] {
                ColorLib.rgb(255,180,180), ColorLib.rgb(190,190,255)
            };
            // map nominal data values to colors using our provided palette
            DataColorAction fill = new DataColorAction("graph.nodes", "gender",
                    Constants.NOMINAL, VisualItem.FILLCOLOR, palette);
            // use black for node text
            ColorAction text = new ColorAction("graph.nodes",
                    VisualItem.TEXTCOLOR, ColorLib.gray(0));
            // use light grey for edges
            ColorAction edges = new ColorAction("graph.edges",
                    VisualItem.STROKECOLOR, ColorLib.gray(200));

            // create an action list containing all color assignments
            ActionList color = new ActionList();
            color.add(fill);
            color.add(text);
            color.add(edges);

            // create an action list with an animated layout
            ActionList layout = new ActionList(Activity.INFINITY);
            layout.add(new ForceDirectedLayout("graph"));
            layout.add(new RepaintAction());

            // add the actions to the visualization
            vis.putAction("color", color);
            vis.putAction("layout", layout);


            // -- 5. the display and interactive controls -------------------------

            Display d = new Display(vis);
            d.setSize(720, 500); // set display size
            // drag individual items around
            d.addControlListener(new DragControl());
            // pan with left-click drag on background
            d.addControlListener(new PanControl()); 
            // zoom with right-click drag
            d.addControlListener(new ZoomControl());

            // -- 6. launch the visualization -------------------------------------

            // create a new window to hold the visualization
            JFrame frame = new JFrame("prefuse example");
            // ensure application exits when window is closed
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.add(d);
            frame.pack();           // layout components in window
            frame.setVisible(true); // show the window

            // assign the colors
            vis.run("color");
            // start up the animated layout
            vis.run("layout");
        }
    });
}

}

Answer 1

我是Prefuse的新手 ，但是一些常見的錯誤可能會導致觀察到的問題。 看看這個例子 ，

• 正如這里所討論的，當你真的想要覆蓋getPreferredSize()時，不要在Display上使用setSize() getPreferredSize() 。

• Swing GUI的對象應當建立並僅在操縱事件調度線程 。

• 初始聚類是圖形原點落在Display組件左上角(0, 0)處的人工制品。 選擇了首選尺寸后，可以將pan()移到中心。

private static final int W = 640;
private static final int H = 480;
…
Display d = new Display(vis) {

    @Override
    public Dimension getPreferredSize() {
        return new Dimension(W, H);
    }
};
d.pan(W / 2, H / 2);