JGraph（T）图元素选择定制

Question

我有使用JGraph（T）库的一些问题。 我需要更改默认选择视图，例如：默认背景为橙色，如果选择顶点然后添加绿色边框，我可以更改此可视化策略以将背景更改为所选元素上的Color.BLUE。 我尝试执行跟随代码：对同一选择OBJ文件

GraphSelectionModel graphSelectionModel = new DefaultGraphSelectionModel(jGraph); 
    graphSelectionModel.setSelectionMode(GraphSelectionModel.MULTIPLE_GRAPH_SELECTION); 
    graphSelectionModel.addGraphSelectionListener(new GraphSelectionListener() 
    { 
     HashMap oldestCellsAndAttrs = new HashMap(); 
     @Override 
     public void valueChanged(GraphSelectionEvent e) 
     { 
      jGraph.getModel().beginUpdate(); 
      m_jgAdapter.edit(oldestCellsAndAttrs, null, null, null); 
      oldestCellsAndAttrs.clear(); 
      Map cellAndAttrs = new HashMap(); 
      for (Object obj : e.getCells()) 
      { 
       DefaultGraphCell cell = (DefaultGraphCell) obj; 
       oldestCellsAndAttrs.put(cell, JGraphModelAdapter.createDefaultVertexAttributes()); 
       Map attrs = cell.getAttributes(); 
       GraphConstants.setBackground(attrs, Color.BLUE); 
       cellAndAttrs.put(cell, attrs); 
      } 
      m_jgAdapter.edit(cellAndAttrs, null, null, null); 
      jGraph.getModel().endUpdate(); 
     } 
    }); 
    fillGraph(tree, g); 
    layout(g, m_jgAdapter, jGraph); 
    setSize(3 * width/4, height); 
    jGraph.setSelectionModel(graphSelectionModel); 

这种变化BKG，但经过非选择不返回。 是否存在默认解决此问题？

Answer 1

我解决foollowing代码问题：

  @Override 
     public void valueChanged(GraphSelectionEvent e) 
     { 
      Object[] cells = e.getCells(); 
      HashMap<DefaultGraphCell, AttributeMap> cellsAndAttrs = new HashMap<DefaultGraphCell, AttributeMap>(); 
      for (Object c : cells) 
      { 
       DefaultGraphCell cell = (DefaultGraphCell) c; 
       AttributeMap cellAttrs = cell.getAttributes(); 
       if (jGraph.isCellSelected(cell)) 
        GraphConstants.setBackground(cellAttrs, SELECTED_COLOR); 
       else 
        GraphConstants.setBackground(cellAttrs, NON_SELECTED_COLOR); 
       cellsAndAttrs.put(cell, cellAttrs); 
      } 
      m_jgAdapter.edit(cellsAndAttrs, null, null, null); 
     }