basicgrapheditor.java

经典的java图像处理程序源码

package com.mxgraph.swing.examples.editor;

import java.awt.BorderLayout;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;
import java.io.File;
import java.util.List;

import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenuBar;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTabbedPane;
import javax.swing.JToolBar;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;

import com.mxgraph.layout.mxCircleLayout;
import com.mxgraph.layout.mxIGraphLayout;
import com.mxgraph.layout.mxPartitionLayout;
import com.mxgraph.layout.mxStackLayout;
import com.mxgraph.swing.mxGraphComponent;
import com.mxgraph.swing.mxGraphOutline;
import com.mxgraph.swing.handler.mxKeyboardHandler;
import com.mxgraph.swing.handler.mxRubberband;
import com.mxgraph.util.mxEvent;
import com.mxgraph.util.mxEventObject;
import com.mxgraph.util.mxRectangle;
import com.mxgraph.util.mxResources;
import com.mxgraph.util.mxUndoManager;
import com.mxgraph.util.mxUndoableEdit;
import com.mxgraph.util.mxEventSource.mxIEventListener;
import com.mxgraph.view.mxGraph;

public class BasicGraphEditor extends JPanel
{

	/**
	 * Adds required resources for i18n
	 */
	static
	{
		mxResources.add("com/mxgraph/swing/examples/resources/editor");
	}

	/**
	 * 
	 */
	protected mxGraphComponent graphComponent;

	/**
	 * 
	 */
	protected mxGraphOutline graphOutline;

	/**
	 * 
	 */
	protected JTabbedPane libraryPane;

	/**
	 * 
	 */
	protected mxUndoManager undoManager;

	/**
	 * 
	 */
	protected String appTitle;

	/**
	 * 
	 */
	protected JLabel statusBar;

	/**
	 * 
	 */
	protected File currentFile;

	/**
	 * 
	 */
	protected boolean modified = false;

	/**
	 * 
	 */
	protected mxRubberband rubberband;

	/**
	 * 
	 */
	protected mxKeyboardHandler keyboardHandler;

	/**
	 * 
	 */
	protected mxIEventListener undoHandler = new mxIEventListener()
	{
		public void invoke(Object source, mxEventObject evt)
		{
			undoManager.undoableEditHappened((mxUndoableEdit) evt.getArgAt(0));
		}
	};

	/**
	 * 
	 */
	protected mxIEventListener changeTracker = new mxIEventListener()
	{
		public void invoke(Object source, mxEventObject evt)
		{
			setModified(true);
		}
	};

	/**
	 * 
	 */
	public BasicGraphEditor(String appTitle, mxGraphComponent component)
	{
		// Stores and updates the frame title
		this.appTitle = appTitle;

		// Stores a reference to the graph and creates the command history
		graphComponent = component;
		final mxGraph graph = graphComponent.getGraph();
		undoManager = new mxUndoManager();

		// Updates the modified flag if the graph model changes
		graph.getModel().addListener(mxEvent.CHANGE, changeTracker);

		// Adds the command history to the model and view
		graph.getModel().addListener(mxEvent.UNDO, undoHandler);
		graph.getView().addListener(mxEvent.UNDO, undoHandler);

		// Keeps the selection in sync with the command history
		mxIEventListener selectionHandler = new mxIEventListener()
		{
			public void invoke(Object source, mxEventObject evt)
			{
				List changes = ((mxUndoableEdit) evt.getArgAt(0)).getChanges();
				graph.setSelectionCells(graph
						.getSelectionCellsForChanges(changes));
			}
		};

		undoManager.addListener(mxEvent.UNDO, selectionHandler);
		undoManager.addListener(mxEvent.REDO, selectionHandler);

		// Creates the graph outline component
		graphOutline = new mxGraphOutline(graphComponent);

		// Creates the library pane that contains the tabs with the palettes
		libraryPane = new JTabbedPane();

		// Creates the inner split pane that contains the library with the
		// palettes and the graph outline on the left side of the window
		JSplitPane inner = new JSplitPane(JSplitPane.VERTICAL_SPLIT,
				libraryPane, graphOutline);
		inner.setDividerLocation(320);
		inner.setResizeWeight(1);
		inner.setDividerSize(6);
		inner.setBorder(null);

		// Creates the outer split pane that contains the inner split pane and
		// the graph component on the right side of the window
		JSplitPane outer = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, inner,
				graphComponent);
		outer.setOneTouchExpandable(true);
		outer.setDividerLocation(200);
		outer.setDividerSize(6);
		outer.setBorder(null);

		// Creates the status bar
		statusBar = createStatusBar();

		// Display some useful information about repaint events
		installRepaintListener();

		// Puts everything together
		setLayout(new BorderLayout());
		add(outer, BorderLayout.CENTER);
		add(statusBar, BorderLayout.SOUTH);
		installToolBar();

		// Installs rubberband selection and handling for some special
		// keystrokes such as F2, Control-C, -V, X, A etc.
		installHandlers();
		installListeners();
		updateTitle();
	}

	/**
	 * 
	 */
	protected void installHandlers()
	{
		rubberband = new mxRubberband(graphComponent);
		keyboardHandler = new EditorKeyboardHandler(graphComponent);
	}

	/**
	 * 
	 */
	protected void installToolBar()
	{
		add(new EditorToolBar(this, JToolBar.HORIZONTAL), BorderLayout.NORTH);
	}

	/**
	 * 
	 */
	protected JLabel createStatusBar()
	{
		JLabel statusBar = new JLabel(mxResources.get("ready"));
		statusBar.setBorder(BorderFactory.createEmptyBorder(2, 4, 2, 4));

		return statusBar;
	}

	/**
	 * 
	 */
	protected void installRepaintListener()
	{
		graphComponent.getGraph().addListener(mxEvent.REPAINT,
				new mxIEventListener()
				{
					public void invoke(Object source, mxEventObject evt)
					{
						String buffer = (graphComponent.getTripleBuffer() != null) ? ""
								: " (unbuffered)";

						if (evt.getArgCount() == 0 || evt.getArgAt(0) == null)
						{
							status("Repaint all" + buffer);
						}
						else
						{
							mxRectangle rect = (mxRectangle) evt.getArgAt(0);
							status("Repaint: x=" + (int) (rect.getX()) + " y="
									+ (int) (rect.getY()) + " w="
									+ (int) (rect.getWidth()) + " h="
									+ (int) (rect.getHeight()) + buffer);
						}
					}
				});
	}

	/**
	 * 
	 */
	public EditorPalette insertPalette(String title)
	{
		final EditorPalette palette = new EditorPalette();
		final JScrollPane scrollPane = new JScrollPane(palette);
		scrollPane
				.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
		scrollPane
				.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
		libraryPane.add(title, scrollPane);

		// Updates the widths of the palettes if the container size changes
		libraryPane.addComponentListener(new ComponentAdapter()
		{
			/**
			 * 
			 */
			public void componentResized(ComponentEvent e)
			{
				int w = scrollPane.getWidth()
						- scrollPane.getVerticalScrollBar().getWidth();
				palette.setPreferredWidth(w);
			}

		});

		return palette;
	}

	/**
	 * 
	 */
	protected void mouseWheelMoved(MouseWheelEvent e)
	{
		if (e.getWheelRotation() < 0)
		{
			graphComponent.zoomIn();
		}
		else
		{
			graphComponent.zoomOut();
		}

		status(mxResources.get("scale") + ": "
				+ (int) (100 * graphComponent.getGraph().getView().getScale())
				+ "%");
	}

	/**
	 * 
	 */
	protected void showOutlinePopupMenu(MouseEvent e)
	{
		Point pt = SwingUtilities.convertPoint(e.getComponent(), e.getPoint(),
				graphComponent);
		JCheckBoxMenuItem item = new JCheckBoxMenuItem(mxResources
				.get("magnifyPage"));
		item.setSelected(graphOutline.isFitPage());

		item.addActionListener(new ActionListener()
		{
			/**
			 * 
			 */
			public void actionPerformed(ActionEvent e)
			{
				graphOutline.setFitPage(!graphOutline.isFitPage());
				graphOutline.repaint();
			}
		});

		JCheckBoxMenuItem item2 = new JCheckBoxMenuItem(mxResources
				.get("showLabels"));
		item2.setSelected(graphOutline.isDrawLabels());

		item2.addActionListener(new ActionListener()
		{
			/**
			 * 
			 */
			public void actionPerformed(ActionEvent e)
			{
				graphOutline.setDrawLabels(!graphOutline.isDrawLabels());
				graphOutline.repaint();
			}
		});

		JCheckBoxMenuItem item3 = new JCheckBoxMenuItem(mxResources
				.get("buffering"));
		item3.setSelected(graphOutline.isTripleBuffered());

		item3.addActionListener(new ActionListener()
		{
			/**
			 * 
			 */
			public void actionPerformed(ActionEvent e)
			{
				graphOutline
						.setTripleBuffered(!graphOutline.isTripleBuffered());
				graphOutline.repaint();
			}
		});

		JPopupMenu menu = new JPopupMenu();
		menu.add(item);
		menu.add(item2);
		menu.add(item3);
		menu.show(graphComponent, pt.x, pt.y);

		e.consume();
	}

	/**
	 * 
	 */
	protected void showGraphPopupMenu(MouseEvent e)
	{
		Point pt = SwingUtilities.convertPoint(e.getComponent(), e.getPoint(),
				graphComponent);
		EditorPopupMenu menu = new EditorPopupMenu(BasicGraphEditor.this);
		menu.show(graphComponent, pt.x, pt.y);

		e.consume();
	}

	/**
	 * 
	 */
	protected void mouseLocationChanged(MouseEvent e)
	{
		status(e.getX() + ", " + e.getY());
	}

	/**
	 * 
	 */
	protected void installListeners()
	{
		// Installs mouse wheel listener for zooming
		MouseWheelListener wheelTracker = new MouseWheelListener()
		{
			/**
			 * 
			 */
			public void mouseWheelMoved(MouseWheelEvent e)
			{
				BasicGraphEditor.this.mouseWheelMoved(e);
			}

		};

		graphOutline.addMouseWheelListener(wheelTracker);