高级java2大学教程 源代码

// DrawingInternalFrame.java // DrawingInternalFrame is a JInternalFrame subclass for // DeitelDrawing drawings. package com.deitel.advjhtp1.drawing; // Java core packages import java.awt.*; import java.awt.event.*; import java.awt.dnd.*; import java.io.*; import java.util.*; import java.util.List; // Java extension packages import javax.swing.*; import javax.swing.event.*; import javax.swing.border.*; // Deitel packages import com.deitel.advjhtp1.drawing.model.*; import com.deitel.advjhtp1.drawing.model.shapes.*; import com.deitel.advjhtp1.drawing.view.*; import com.deitel.advjhtp1.drawing.controller.*; public class DrawingInternalFrame extends JInternalFrame implements Observer { // offsets to stagger new windows private static final int xOffset = 30; private static final int yOffset = 30; private static int openFrameCount = 0; // MVC components private DrawingModel drawingModel; private DrawingView drawingView; private MyShapeController myShapeController; private DragAndDropController dragAndDropController; private MyShapeControllerFactory shapeControllerFactory; // file management properties private JFileChooser fileChooser; private String fileName; private String absoluteFilePath; private boolean saved = true; private DrawingToolBar toolBar; private ZoomDialog zoomDialog; // Actions for save, zoom, move, etc. private Action saveAction, saveAsAction, zoomAction, moveAction, fillAction, gradientAction; // DrawingInternalFrame constructor public DrawingInternalFrame( String title ) { super( title + " - " + ( ++openFrameCount ), true, true, false, true ); setDefaultCloseOperation( WindowConstants.DO_NOTHING_ON_CLOSE ); // create new DrawingModel drawingModel = new DrawingModel(); // create new DrawingView for DrawingModel drawingView = new DrawingView( drawingModel ); // register DrawingInternalFrame as a DrawingModel Observer drawingModel.addObserver( this ); // MyShapeControllerFactory for creating MyShapeControllers shapeControllerFactory = MyShapeControllerFactory.getInstance(); // create DragAndDropController for drag and drop operations dragAndDropController = new DragAndDropController( drawingModel ); // get default DragSource for current platform DragSource dragSource = DragSource.getDefaultDragSource(); // create DragGestureRecognizer to register // DragAndDropController as DragGestureListener dragSource.createDefaultDragGestureRecognizer( drawingView, DnDConstants.ACTION_COPY_OR_MOVE, dragAndDropController ); // enable drawingView to accept drop operations, using // dragAndDropController as DropTargetListener drawingView.setDropTarget( new DropTarget( drawingView, DnDConstants.ACTION_COPY_OR_MOVE, dragAndDropController ) ); // add drawingView to viewPanel, put viewPanel in // JScrollPane and add JScrollPane to DrawingInternalFrame JPanel viewPanel = new JPanel(); viewPanel.add( drawingView ); getContentPane().add( new JScrollPane( viewPanel ), BorderLayout.CENTER ); // create fileChooser and set its FileFilter fileChooser = new JFileChooser(); fileChooser.setFileFilter( new DrawingFileFilter() ); // show/hide ZoomDialog when frame activated/deactivated addInternalFrameListener( new InternalFrameAdapter() { // when DrawingInternalFrame activated, make // associated zoomDialog visible public void internalFrameActivated( InternalFrameEvent event ) { if ( zoomDialog != null ) zoomDialog.setVisible( true ); } // when DrawingInternalFrame is deactivated, make // associated zoomDialog invisible public void internalFrameDeactivated( InternalFrameEvent event ) { if ( zoomDialog != null ) zoomDialog.setVisible( false ); } } ); // end call to addInternalFrameListener // stagger each DrawingInternalFrame to prevent it from // obscuring other InternalFrames setLocation( xOffset * openFrameCount, yOffset * openFrameCount ); // add new DrawingToolBar to NORTH area toolBar = new DrawingToolBar(); getContentPane().add( toolBar, BorderLayout.NORTH ); // get name of first MyShape that shapeControllerFactory // supports and create MyShapeController String shapeName = shapeControllerFactory.getSupportedShapes()[ 0 ]; setMyShapeController( shapeControllerFactory.newMyShapeController( drawingModel, shapeName ) ); // set DrawingInternalFrame size setSize( 500, 320 ); } // end DrawingInternalFrame constructor // get DrawingInternalFrame Save Action public Action getSaveAction() { return saveAction; } // get DrawingInternalFrame Save As Action public Action getSaveAsAction() { return saveAsAction; } // set Saved flag for current drawing and update frame // title to indicate saved state to user public void setSaved( boolean drawingSaved ) { // set Saved property saved = drawingSaved; // get current DrawingInternalFrame title String title = getTitle(); // if drawing is not saved and title does not end with // an asterisk, add asterisk to title if ( !title.endsWith( " *" ) && !isSaved() ) setTitle( title + " *" ); // if title ends with * and drawing has been saved, // remove * from title else if ( title.endsWith( " *" ) && isSaved() ) setTitle( title.substring( 0, title.length() - 2 ) ); // enable save actions if drawing not saved getSaveAction().setEnabled( !isSaved() ); } // return value of saved property public boolean isSaved() { return saved; } // handle updates from DrawingModel public void update( Observable observable, Object object ) { // set saved property to false to indicate that // DrawingModel has changed setSaved( false ); } // set fileName for current drawing public void setFileName( String file ) { fileName = file; // update DrawingInternalFrame title setTitle( fileName ); } // get fileName for current drawing public String getFileName() { return fileName; } // get full path (absoluteFilePath) for current drawing public String getAbsoluteFilePath() { return absoluteFilePath; } // set full path (absoluteFilePath) for current drawing public void setAbsoluteFilePath( String path ) { absoluteFilePath = path; } // get DrawingModel for current drawing public DrawingModel getModel() { return drawingModel; } // set JInternalFrame and ZoomDialog titles public void setTitle( String title ) { super.setTitle( title ); if ( zoomDialog != null ) zoomDialog.setTitle( title ); } // set MyShapeController for handling user input public void setMyShapeController( MyShapeController controller ) { // remove old MyShapeController if ( myShapeController != nul