我当时在玩JUNG2，并想实现一个小的GUI，使我可以显示和更改Graph。遵循JUNG库中的示例可以很好地工作，但是它们没有将模型，视图和控制器分开。因此，我开始以清晰的分离来构建GUI。
我的第一个GUI版本应该只是显示初始图形。视图是模型的观察者，只要图形发生更改，该通知就会在图形的初始化步骤中恰好发生一次，并获得通知。但是，该图并没有显示在屏幕的中央（就像在非MVC示例中一样），但是我可以在左上角看到它的一小部分。
现在，这引出了一个普遍的问题：我如何告诉jung可视化组件模型已更改？以及以后的内容：如何使用现成的组件，例如MVC体系结构中的Jung-Mouse？ JUNG似乎混合了模型，视图和控制器，但我不确定如何以及在何处正确使用它们。
编辑：Jung教程显示了如何使用鼠标来管理更改，但未显示如何根据模型中的更改来更改视图（通过其他选项，例如按钮“添加节点”或其他）
到目前为止，这是我的第一次尝试：
风景
public class MOCView implements GraphChangeObserver {
private final ControllerInterface controller;
private final MOCModelInterface model;
private Layout<Node, Edge> layout;
private BasicVisualizationServer<Node, Edge> visualization;
private JFrame frame;
public MOCView(final ControllerInterface controller,
final MOCModelInterface model) {
this.controller = controller;
this.model = model;
model.registerObserver(this);
}
public void createView() {
this.layout = new CircleLayout<Node, Edge>(this.model.getGraph());
this.layout.setSize(new Dimension(300, 300));
this.visualization = new BasicVisualizationServer<Node, Edge>(
this.layout);
this.visualization.setPreferredSize(new Dimension(350, 350));
this.frame = new JFrame("MOC View");
this.frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.frame.getContentPane().add(this.visualization);
this.frame.pack();
this.frame.setVisible(true);
}
@Override
public void updateGraph() {
this.visualization.repaint();
}
}
该模型
public class MOCModel implements MOCModelInterface {
private final Graph<Node, Edge> graph = new DirectedSparseGraph<Node, Edge>();
private final ArrayList<GraphChangeObserver> graphChangeObservers = new ArrayList<GraphChangeObserver>();
@Override
public void initialize() {
this.generateInitialGraph();
}
@Override
public Graph<Node, Edge> getGraph() {
return this.graph;
}
@Override
public void registerObserver(final GraphChangeObserver o) {
this.graphChangeObservers.add(o);
}
@Override
public void removeObserver(final GraphChangeObserver o) {
this.graphChangeObservers.remove(o);
}
private void generateInitialGraph() {
final Node nodeA = new Node("Node A");
this.graph.addVertex(nodeA);
final Node nodeB = new Node("Node B");
this.graph.addVertex(nodeB);
final Node nodeC = new Node("Node C");
this.graph.addVertex(nodeC);
final Node nodeD = new Node("Node D");
this.graph.addVertex(nodeD);
final Node nodeE = new Node("Node E");
this.graph.addVertex(nodeE);
this.graph.addEdge(new Edge("Edge 1"), nodeA, nodeB);
this.graph.addEdge(new Edge("Edge 2"), nodeA, nodeC);
this.graph.addEdge(new Edge("Edge 3"), nodeB, nodeC);
this.graph.addEdge(new Edge("Edge 4"), nodeC, nodeD);
this.graph.addEdge(new Edge("Edge 5"), nodeD, nodeE);
this.graph.addEdge(new Edge("Edge 6"), nodeA, nodeE);
this.graph.addEdge(new Edge("Edge 7"), nodeE, nodeA);
this.graph.addEdge(new Edge("Edge 8"), nodeD, nodeB);
notifyGraphChangeObservers();
}
private void notifyGraphChangeObservers() {
for (final GraphChangeObserver gco : this.graphChangeObservers) {
gco.updateGraph();
}
}
}
控制器
public class MOCController implements ControllerInterface {
private final MOCModelInterface model;
private final MOCView view;
public MOCController(final MOCModelInterface model) {
this.model = model;
this.view = new MOCView(this, model);
this.view.createView();
this.model.initialize();
}
}
主班
public class MOCStart {
/**
* @param args
*/
public static void main(final String[] args) {
final MOCModelInterface model = new MOCModel();
new MOCController(model);
}
}
最佳答案
了解JUNG2如何工作的最佳方法是通过M2e Maven Eclipse插件使用Maven svn checkout http://jung.googlecode.com/svn/trunk/ jung-read-only从SVN存储库中查看其样本。
在此处，检查edu.uci.ics.jung.samples包，以获取涉及图形鼠标的各种JUNG2代码示例： GraphEditorDemo.java
注意：请应用以下SVN补丁来更正一些错误
### Eclipse Workspace Patch 1.0
#P jung-io
Index: src/test/java/edu/uci/ics/jung/io/TestGraphMLReader.java
===================================================================
--- src/test/java/edu/uci/ics/jung/io/TestGraphMLReader.java (revision 31)
+++ src/test/java/edu/uci/ics/jung/io/TestGraphMLReader.java (working copy)
@@ -125,7 +125,7 @@
public void testAttributes() throws IOException
{
Graph<Number, Number> graph = new UndirectedSparseGraph<Number, Number>();
- gmlreader.load("src/test/resources/attributes.graphml", graph);
+ gmlreader.load("src/test/resources/edu/uci/ics/jung/io/graphml/attributes.graphml", graph);
Assert.assertEquals(graph.getVertexCount(), 6);
Assert.assertEquals(graph.getEdgeCount(), 7);
@@ -193,7 +193,7 @@
GraphMLReader<Hypergraph<Number, Number>, Number, Number> hyperreader =
new GraphMLReader<Hypergraph<Number, Number>, Number, Number>(
vertexFactory, edgeFactory);
- hyperreader.load("src/test/resources/hyper.graphml", graph);
+ hyperreader.load("src/test/resources/edu/uci/ics/jung/io/graphml/hyper.graphml", graph);
Assert.assertEquals(graph.getVertexCount(), 7);
Assert.assertEquals(graph.getEdgeCount(), 4);
### Eclipse Workspace Patch 1.0
#P jung2
Index: jung-visualization/src/main/java/edu/uci/ics/jung/visualization/control/EditingPopupGraphMousePlugin.java
===================================================================
--- jung-visualization/src/main/java/edu/uci/ics/jung/visualization/control/EditingPopupGraphMousePlugin.java (revision 31)
+++ jung-visualization/src/main/java/edu/uci/ics/jung/visualization/control/EditingPopupGraphMousePlugin.java (working copy)
@@ -54,6 +54,8 @@
final PickedState<V> pickedVertexState = vv.getPickedVertexState();
final PickedState<E> pickedEdgeState = vv.getPickedEdgeState();
+ popup.removeAll();
+
if(vertex != null) {
Set<V> picked = pickedVertexState.getPicked();
if(picked.size() > 0) {