jtablerenderer.java

经典的java图像处理程序源码

/*
 * $Id: JTableRenderer.java,v 1.5 2009/03/20 08:56:46 gaudenz Exp $
 * Copyright (c) 2001-2005, Gaudenz Alder
 * 
 * All rights reserved.
 * 
 * See LICENSE file for license details. If you are unable to locate
 * this file please contact info (at) jgraph (dot) com.
 */
package com.mxgraph.swing.examples.editor;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Point;
import java.awt.datatransfer.Transferable;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DropTarget;
import java.awt.dnd.DropTargetDragEvent;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.dnd.DropTargetEvent;
import java.awt.dnd.DropTargetListener;
import java.awt.event.ActionEvent;
import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;

import javax.swing.AbstractAction;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.TransferHandler;
import javax.swing.border.BevelBorder;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumn;
import javax.swing.table.TableModel;

import com.mxgraph.model.mxGeometry;
import com.mxgraph.swing.mxGraphComponent;
import com.mxgraph.swing.handler.mxCellHandler;
import com.mxgraph.swing.handler.mxGraphTransferHandler;
import com.mxgraph.swing.util.mxGraphTransferable;
import com.mxgraph.view.mxGraph;

/**
 * @author Administrator
 * 
 */
public class JTableRenderer extends JComponent
{

	/**
	 * 
	 */
	public static final String IMAGE_PATH = "/com/mxgraph/swing/examples/images/";

	/**
	 * 
	 */
	protected static JTableRenderer dragSource = null;

	/**
	 * 
	 */
	protected static int sourceRow = 0;

	/**
	 * 
	 */
	protected Object cell;

	/**
	 * 
	 */
	protected mxGraphComponent graphContainer;

	/**
	 * 
	 */
	protected mxGraph graph;

	/**
	 * 
	 */
	public JTable table;

	/**
	 * 
	 */
	public JTableRenderer(final Object cell,
			final mxGraphComponent graphContainer)
	{
		this.cell = cell;
		this.graphContainer = graphContainer;
		this.graph = graphContainer.getGraph();
		setLayout(new BorderLayout());
		setBorder(BorderFactory.createCompoundBorder(ShadowBorder
				.getSharedInstance(), BorderFactory
				.createBevelBorder(BevelBorder.RAISED)));

		JPanel title = new JPanel();
		title.setBackground(new Color(149, 173, 239));
		title.setOpaque(true);
		title.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 1));
		title.setLayout(new BorderLayout());

		JLabel icon = new JLabel(new ImageIcon(JTableRenderer.class
				.getResource(IMAGE_PATH + "preferences.gif")));
		icon.setBorder(BorderFactory.createEmptyBorder(0, 2, 0, 1));
		title.add(icon, BorderLayout.WEST);

		JLabel label = new JLabel(String.valueOf(graph.getLabel(cell)));
		label.setForeground(Color.WHITE);
		label.setFont(title.getFont().deriveFont(Font.BOLD, 11));
		label.setBorder(BorderFactory.createEmptyBorder(0, 1, 0, 2));
		title.add(label, BorderLayout.CENTER);

		JPanel toolBar2 = new JPanel();
		toolBar2.setLayout(new FlowLayout(FlowLayout.LEFT, 1, 2));
		toolBar2.setOpaque(false);
		JButton button = new JButton(new AbstractAction("", new ImageIcon(
				JTableRenderer.class.getResource(IMAGE_PATH + "minimize.gif")))
		{

			public void actionPerformed(ActionEvent e)
			{
				graph.foldCells(graph.isCellCollapsed(cell), false,
						new Object[] { cell });

				mxGeometry geometry = graph.getModel().getGeometry(cell);

				((JButton) e.getSource())
						.setIcon(new ImageIcon(
								JTableRenderer.class
										.getResource(IMAGE_PATH
												+ ((graph.isCellCollapsed(cell)) ? "maximize.gif"
														: "minimize.gif"))));
			}
		});
		button.setPreferredSize(new Dimension(16, 16));
		button.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
		button.setToolTipText("Collapse/Expand");
		button.setOpaque(false);
		toolBar2.add(button);

		title.add(toolBar2, BorderLayout.EAST);
		add(title, BorderLayout.NORTH);

		// CellStyle style =
		// graph.getStylesheet().getCellStyle(graph.getModel(),
		// cell);
		// if (style.getStyleClass() == null) {
		table = new MyTable();
		JScrollPane scrollPane = new JScrollPane(table);
		scrollPane.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));

		if (graph.getModel().getChildCount(cell) == 0)
		{
			scrollPane.getViewport().setBackground(Color.WHITE);
			setOpaque(true);
			add(scrollPane, BorderLayout.CENTER);
		}

		scrollPane.getVerticalScrollBar().addAdjustmentListener(
				new AdjustmentListener()
				{

					public void adjustmentValueChanged(AdjustmentEvent e)
					{
						graphContainer.refresh();
					}

				});

		label = new JLabel(new ImageIcon(JTableRenderer.class
				.getResource(IMAGE_PATH + "resize.gif")));
		label.setCursor(new Cursor(Cursor.NW_RESIZE_CURSOR));

		JPanel panel = new JPanel();
		panel.setLayout(new BorderLayout());
		panel.add(label, BorderLayout.EAST);

		add(panel, BorderLayout.SOUTH);

		ResizeHandler resizeHandler = new ResizeHandler();
		label.addMouseListener(resizeHandler);
		label.addMouseMotionListener(resizeHandler);
		
		setMinimumSize(new Dimension(20, 30));
	}

	/**
	 * Implements an event redirector for the specified handle index, where 0
	 * is the top right, and 1-7 are the top center, rop right, middle left,
	 * middle right, bottom left, bottom center and bottom right, respectively.
	 * Default index is 7 (bottom right).
	 */
	public class ResizeHandler implements MouseListener, MouseMotionListener
	{

		protected int index;

		public ResizeHandler()
		{
			this(7);
		}

		public ResizeHandler(int index)
		{
			this.index = index;
		}

		public void mouseClicked(MouseEvent e)
		{
			// ignore
		}

		public void mouseEntered(MouseEvent e)
		{
			// ignore
		}

		public void mouseExited(MouseEvent e)
		{
			// ignore
		}

		public void mousePressed(MouseEvent e)
		{
			// Selects to create a handler for resizing
			if (!graph.isSelected(cell))
			{
				graphContainer.selectCellForEvent(cell, e);
			}

			// Initiates a resize event in the handler
			mxCellHandler handler = graphContainer.getGraphHandler()
					.getHandler(cell);

			if (handler != null)
			{
				// Starts the resize at index 7 (bottom right)
				handler.start(SwingUtilities.convertMouseEvent((Component) e
						.getSource(), e, graphContainer.getGraphControl()),
						index);
				e.consume();
			}
		}

		public void mouseReleased(MouseEvent e)
		{
			graphContainer.getGraphControl().dispatchEvent(
					SwingUtilities.convertMouseEvent((Component) e.getSource(),
							e, graphContainer.getGraphControl()));
		}

		public void mouseDragged(MouseEvent e)
		{
			graphContainer.getGraphControl().dispatchEvent(
					SwingUtilities.convertMouseEvent((Component) e.getSource(),
							e, graphContainer.getGraphControl()));
		}

		public void mouseMoved(MouseEvent e)
		{
			// ignore
		}
	}

	/**
	 * 
	 */
	public class MyTable extends JTable implements DropTargetListener
	{

		Object[][] data;

		String[] colNames = new String[] { "A", "B", "C", "D", "E" };

		public MyTable()
		{
			data = new Object[30][5];
			for (int i = 0; i < 30; i++)
			{
				data[i][0] = new Boolean(false);
				data[i][1] = "Column " + i;
				data[i][2] = (Math.random() > 0.5) ? new ImageIcon(
						JTableRenderer.class.getResource(IMAGE_PATH
								+ "preferences.gif")) : null;
				data[i][3] = (Math.random() > 0.5) ? new ImageIcon(
						JTableRenderer.class.getResource(IMAGE_PATH
								+ "preferences.gif")) : null;
				data[i][4] = (Math.random() > 0.5) ? new ImageIcon(
						JTableRenderer.class.getResource(IMAGE_PATH
								+ "preferences.gif")) : null;
			}
			setModel(createModel());
			setTableHeader(null);
			setAutoscrolls(true);
			setGridColor(Color.WHITE);
			TableColumn column = getColumnModel().getColumn(0);
			column.setMaxWidth(20);
			column = getColumnModel().getColumn(2);
			column.setMaxWidth(12);
			column = getColumnModel().getColumn(3);
			column.setMaxWidth(12);
			column = getColumnModel().getColumn(4);
			column.setMaxWidth(12);

			setTransferHandler(new TransferHandler()
			{

				/* (non-Javadoc)
				 * @see javax.swing.TransferHandler#getSourceActions(javax.swing.JComponent)
				 */
				@Override
				public int getSourceActions(JComponent c)
				{
					return COPY_OR_MOVE;
				}

				/*
				 * (non-Javadoc)
				 * 
				 * @see javax.swing.TransferHandler#createTransferable(javax.swing.JComponent)
				 */
				protected Transferable createTransferable(JComponent c)
				{
					sourceRow = getSelectedRow();
					dragSource = JTableRenderer.this;
					//mxRectangle bounds = new mxRectangle(0, 0, MyTable.this
					//		.getWidth(), 20);
					return new mxGraphTransferable(null, null, null);
				}

			});

			setDragEnabled(true);
			setDropTarget(new DropTarget(this, // component
					DnDConstants.ACTION_COPY_OR_MOVE, // actions
					this));
			setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
		}

		/**
		 * 
		 */
		public DropTarget getDropTarget()
		{
			if (!((mxGraphTransferHandler) graphContainer.getTransferHandler())
					.isLocalDrag())
			{
				return super.getDropTarget();
			}

			return null;
		}

		/*
		 * (non-Javadoc)
		 * 
		 * @see java.awt.dnd.DropTargetListener#dragEnter(java.awt.dnd.DropTargetDragEvent)
		 */
		public void dragEnter(DropTargetDragEvent e)
		{

		}

		/*
		 * (non-Javadoc)
		 * 
		 * @see java.awt.dnd.DropTargetListener#dragOver(java.awt.dnd.DropTargetDragEvent)
		 */
		public void dragOver(DropTargetDragEvent e)
		{
			if (!((mxGraphTransferHandler) graphContainer.getTransferHandler())
					.isLocalDrag()
					&& JTableRenderer.this != dragSource)
			{
				Point p = e.getLocation();
				int row = rowAtPoint(p);
				getSelectionModel().setSelectionInterval(row, row);
			}
		}

		/*
		 * (non-Javadoc)
		 * 
		 * @see java.awt.dnd.DropTargetListener#dropActionChanged(java.awt.dnd.DropTargetDragEvent)
		 */
		public void dropActionChanged(DropTargetDragEvent dtde)
		{
			// TODO Auto-generated method stub

		}

		/*
		 * (non-Javadoc)
		 * 
		 * @see java.awt.dnd.DropTargetListener#drop(java.awt.dnd.DropTargetDropEvent)
		 */
		public void drop(DropTargetDropEvent e)
		{
			if (dragSource != null)
			{
				e.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
				Point p = e.getLocation();
				int targetRow = rowAtPoint(p);

				Object edge = graph.insertEdge(null, null, null,
						dragSource.cell, JTableRenderer.this.cell, "sourceRow="
								+ sourceRow + ";targetRow=" + targetRow);
				graph.setSelectionCell(edge);

				// System.out.println("clearing drag source");
				dragSource = null;
				e.dropComplete(true);
			}
			else
			{
				e.rejectDrop();
			}
		}

		/*
		 * (non-Javadoc)
		 * 
		 * @see java.awt.dnd.DropTargetListener#dragExit(java.awt.dnd.DropTargetEvent)
		 */
		public void dragExit(DropTargetEvent dte)
		{
			// TODO Auto-generated method stub

		}

		/**
		 * 
		 * @return the created table model
		 */
		public TableModel createModel()
		{
			return new AbstractTableModel()
			{

				public int getColumnCount()
				{
					return colNames.length;
				}

				public int getRowCount()
				{
					return data.length;
				}

				public String getColumnName(int col)
				{
					return colNames[col];
				}

				public Object getValueAt(int row, int col)
				{
					return data[row][col];
				}

				public Class getColumnClass(int c)
				{
					Object value = getValueAt(0, c);
					return (value != null) ? value.getClass() : ImageIcon.class;
				}

				/*
				 * Don't need to implement this method unless your table's
				 * editable.
				 */
				public boolean isCellEditable(int row, int col)
				{
					return col == 0;
				}

				/*
				 * Don't need to implement this method unless your table's data
				 * can change.
				 */
				public void setValueAt(Object value, int row, int col)
				{
					data[row][col] = value;
					fireTableCellUpdated(row, col);
				}
			};

		}

	}

	/**
	 * 
	 */
	public static JTableRenderer getVertex(Component component)
	{
		while (component != null)
		{
			if (component instanceof JTableRenderer)
			{
				return (JTableRenderer) component;
			}
			component = component.getParent();
		}

		return null;
	}

}