jtreetable.java

java jtable功能的实现

package view;

/*
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import java.awt.Color;
import java.awt.Dimension;
import java.awt.Component;
import java.awt.Graphics;

import javax.swing.JTable;
import javax.swing.JTree;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.tree.DefaultTreeSelectionModel;
import javax.swing.tree.TreeModel;

/**
 * This example shows how to create a simple JTreeTable component, by using a
 * JTree as a renderer (and editor) for the cells in a particular column in the
 * JTable.
 * 
 * @version %I% %G%
 * 
 * @author Philip Milne
 * @author Scott Violet
 */

@SuppressWarnings("serial")
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));
	}

	/*
	 * 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());
				setBackground(Color.YELLOW);
			else{
				setBackground(table.getBackground());
				//setBackground(Color.RED);
			}
			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;
		}
	}

}