JTreeTable更新

Question

我正在尝试使用取自 http:// java.sun.com/products/jfc/tsc/articles/treetable2/index.html，其中我用我的模型替换了文件系统模型。

我最初创建一个模型，将其显示在 JTreeTable 中，但现在我想更新我的模型，然后更新 JTreeTable （例如我想添加一个节点在树上，修改节点、删除节点等）。

我不知道我该怎么做。我看不到允许我做我想做的事情的方法，我只看到一些方法，如 treeNodesChanged、treeNodesInserted 等，但可能我错过了全局中的一些东西此 JTreeTable 组件的逻辑。

此外，我不确定我是否正确创建了模型，因为在各种示例中，我看到人们通过“模型”对象调用各种方法（model.insertNodeInto，model.reload< /code>)，尽管我没有模型对象。在上面的示例中，它被简单地称为抽象类 AbstractTreeTableModel ，它实现了 TreeTableModel..

更新

public class TableModel extends AbstractTreeTableModel 
                         implements TreeTableModel {
 static protected String[]  cNames = {"TrackNumber", "MWRTN", "LSRTN", "RFTN","TrackStatus","Prova","Prova2"};
    // Types of the columns.
 static protected Class[]  cTypes = {TreeTableModel.class,Integer.class, Integer.class, Integer.class, Integer.class,String.class,String.class};

 private ArrayList<Object> data=new ArrayList<Object>();
     public void insertNode(Object node)
     {    this.data.add(node);    super.setRoot(data.get(0));}

于我的主类 我以这种方式将对象添加到我的模型中：

...
model =new TableModel();
model.insertNode(threatList.get(i)); //inserting the root node
model.addChild(threatList.get(i),threatList.get(j)); // inserting the child
...

然后我将模型传递到我的 JTreeTable 并将其添加到我的框架中：

treeTable = new JTreeTable(model);
JScrollPane scroll=new JScrollPane(treeTable);
scroll.setAutoscrolls(false);
scroll.setPreferredSize(new Dimension(1000,80));
frame.add(scroll);

这是 JTreeTable 类：

public class JTreeTable extends JTable {
protected TreeTableCellRenderer tree;

public JTreeTable(TreeTableModel treeTableModel) {
super();

// Create the tree. It will be used as a renderer and editor. 
tree = new TreeTableCellRenderer(treeTableModel); 

// Install a tableModel representing the visible rows in the tree. 
super.setModel(new TreeTableModelAdapter(treeTableModel, tree));

// Force the JTable and JTree to share their row selection models. 
tree.setSelectionModel(new DefaultTreeSelectionModel() { 
    // Extend the implementation of the constructor, as if: 
 /* public this() */ {
    setSelectionModel(listSelectionModel); 
    } 
}); 
// Make the tree and table row heights the same. 
tree.setRowHeight(getRowHeight());

// Install the tree editor renderer and editor. 
setDefaultRenderer(TreeTableModel.class, tree); 
setDefaultEditor(TreeTableModel.class, new TreeTableCellEditor());  

setShowGrid(false);
setIntercellSpacing(new Dimension(0, 0)); 
setPreferredSize(new Dimension(60,60));
}

/* Workaround for BasicTableUI anomaly. Make sure the UI never tries to 
 * paint the editor. The UI currently uses different techniques to 
 * paint the renderers and editors and overriding setBounds() below 
 * is not the right thing to do for an editor. Returning -1 for the 
 * editing row in this case, ensures the editor is never painted. 
 */
public int getEditingRow() {
    return (getColumnClass(editingColumn) == TreeTableModel.class) ? -1 : editingRow;  
}

// 
// The renderer used to display the tree nodes, a JTree.  
//

public class TreeTableCellRenderer extends JTree implements TableCellRenderer {

protected int visibleRow;

public TreeTableCellRenderer(TreeModel model) { 
    super(model); 
}

public void setBounds(int x, int y, int w, int h) {
    super.setBounds(x, 0, w, JTreeTable.this.getHeight());
}

public void paint(Graphics g) {
    g.translate(0, -visibleRow * getRowHeight());
    super.paint(g);
}

public Component getTableCellRendererComponent(JTable table,
                           Object value,
                           boolean isSelected,
                           boolean hasFocus,
                           int row, int column) {
    if(isSelected)
           setBackground(table.getSelectionBackground());
    else
           setBackground(table.getBackground());

    visibleRow = row;
    return this;
    }
 }

 // 
 // The editor used to interact with tree nodes, a JTree.  
 //

public class TreeTableCellEditor extends AbstractCellEditor implements TableCellEditor {
    public Component getTableCellEditorComponent(JTable table, Object value,
                             boolean isSelected, int r, int c) {
        return tree;
    }

    @Override
    public Object getCellEditorValue() {
        // TODO Auto-generated method stub
        return null;
    }
}

我要做的是触发一个事件添加（或修改或删除）子项后。

Answer 1

模型是保存数据的类。每次数据发生变化时，它都必须告诉视图，以便视图自行刷新并显示模型的新数据。这是 fireXxx() 方法的目标。

与其他 Swing 组件一样，当您更改组件显示的数据时，您应该通过更改模型中的数据来实现，并调用适当的 fireXxx 方法。最好的做法是将其封装在模型类中，方法是在 AbstractTreeTableModel 的子类中添加特定方法，这些方法执行数据修改并使用一次或多次调用 fireXxx 来触发适当的事件。

我建议您阅读有关 表 的 Swing 教程，或者 trees ，然后将您在此处学到的内容应用到您的树表中。这个想法是一样的。