/* * Copyright (c) 2000 David Flanagan.  All rights reserved. * This code is from the book Java Examples in a Nutshell, 2nd Edition. * It is provided AS-IS, WITHOUT ANY WARRANTY either expressed or implied. * You may study, use, and modify it for any non-commercial purpose. * You may distribute it non-commercially as long as you retain this notice. * For a commercial use license, or to purchase the book (recommended), * visit http://www.davidflanagan.com/javaexamples2. */package com.davidflanagan.examples.graphics;import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.event.*;import java.awt.print.*;/** * This class displays one or more GraphicsExample objects in a * Swing JFrame and a JTabbedPane */public class GraphicsExampleFrame extends JFrame {    public GraphicsExampleFrame(final GraphicsExample[] examples) {	super("GraphicsExampleFrame");	Container cpane = getContentPane();   // Set up the frame 	cpane.setLayout(new BorderLayout());	final JTabbedPane tpane = new JTabbedPane(); // And the tabbed pane 	cpane.add(tpane, BorderLayout.CENTER);	// Add a menubar	JMenuBar menubar = new JMenuBar();         // Create the menubar	this.setJMenuBar(menubar);                 // Add it to the frame	JMenu filemenu = new JMenu("File");        // Create a File menu	menubar.add(filemenu);                     // Add to the menubar	JMenuItem print = new JMenuItem("Print");  // Create a Print item	filemenu.add(print);                       // Add it to the menu	JMenuItem quit = new JMenuItem("Quit");    // Create a Quit item	filemenu.add(quit);                        // Add it to the menu	// Tell the Print menu item what to do when selected	print.addActionListener(new ActionListener() {		public void actionPerformed(ActionEvent e) {		    // Get the currently displayed example, and call 		    // the print method (defined below)		    print(examples[tpane.getSelectedIndex()]);		}	    });	// Tell the Quit menu item what to do when selected	quit.addActionListener(new ActionListener() {		public void actionPerformed(ActionEvent e) { System.exit(0); }	    });	// In addition to the Quit menu item, also handle window close events	this.addWindowListener(new WindowAdapter() {		public void windowClosing(WindowEvent e) { System.exit(0); }	    });	// Insert each of the example objects into the tabbed pane	for(int i = 0; i < examples.length; i++) {	    GraphicsExample e = examples[i];	    tpane.addTab(e.getName(), new GraphicsExamplePane(e));	}    }    /**     * This inner class is a custom Swing component that displays     * a GraphicsExample object.     */    public class GraphicsExamplePane extends JComponent {	GraphicsExample example;  // The example to display	Dimension size;           // How much space it requires		public GraphicsExamplePane(GraphicsExample example) {	    this.example = example;	    size = new Dimension(example.getWidth(), example.getHeight());	}	/** Draw the component and the example it contains */	public void paintComponent(Graphics g) {	    g.setColor(Color.white);                    // set the background	    g.fillRect(0, 0, size.width, size.height);  // to white	    g.setColor(Color.black);             // set a default drawing color	    example.draw((Graphics2D) g, this);  // ask example to draw itself	}	// These methods specify how big the component must be	public Dimension getPreferredSize() { return size; }	public Dimension getMinimumSize() { return size; }    }    /** This method is invoked by the Print menu item */    public void print(final GraphicsExample example) {	// Start off by getting a printer job to do the printing	PrinterJob job = PrinterJob.getPrinterJob();	// Wrap the example in a Printable object (defined below)	// and tell the PrinterJob that we want to print it	job.setPrintable(new PrintableExample(example));	// Display the print dialog to the user	if (job.printDialog()) {	    // If they didn't cancel it, then tell the job to start printing	    try {		job.print();	    }	    catch(PrinterException e) {		System.out.println("Couldn't print: " + e.getMessage());	    }	}    }    /**     * This inner class implements the Printable interface in order to print     * a GraphicsExample object.     **/    class PrintableExample implements Printable  {	GraphicsExample example;  // The example to print	// The constructor.  Just remember the example	public PrintableExample(GraphicsExample example) {	    this.example = example;	}	/**	 * This method is called by the PrinterJob to print the example	 **/	public int print(Graphics g, PageFormat pf, int pageIndex) {	    // Tell the PrinterJob that there is only one page	    if (pageIndex != 0) return NO_SUCH_PAGE;	    // The PrinterJob supplies us a Graphics object to draw with.	    // Anything drawn with this object will be sent to the printer.	    // The Graphics object can safely be cast to a Graphics2D object.	    Graphics2D g2 = (Graphics2D)g;	    // Translate to skip the left and top margins.	    g2.translate(pf.getImageableX(), pf.getImageableY());	    // Figure out how big the printable area is, and how big	    // the example is.	    double pageWidth = pf.getImageableWidth();	    double pageHeight = pf.getImageableHeight();	    double exampleWidth = example.getWidth();	    double exampleHeight = example.getHeight();	    // Scale the example if needed	    double scalex = 1.0, scaley = 1.0;	    if (exampleWidth > pageWidth) scalex = pageWidth/exampleWidth;	    if (exampleHeight > pageHeight) scaley = pageHeight/exampleHeight;	    double scalefactor = Math.min(scalex, scaley);	    if (scalefactor != 1) g2.scale(scalefactor, scalefactor);	    // Finally, call the draw() method of the example, passing in	    // the Graphics2D object for the printer	    example.draw(g2, GraphicsExampleFrame.this);	    // Tell the PrinterJob that we successfully printed the page	    return PAGE_EXISTS;	}    }    /**      * The main program.  Use Java reflection to load and instantiate     * the specified GraphicsExample classes, then create a     * GraphicsExampleFrame to display them.     **/    public static void main(String[] args) {	GraphicsExample[] examples = new GraphicsExample[args.length];	// Loop through the command line arguments	for(int i=0; i < args.length; i++) {	    // The class name of the requested example	    String classname = args[i];	    	    // If no package is specified, assume it is in this package	    if (classname.indexOf('.') == -1)		classname = "com.davidflanagan.examples.graphics."+args[i];	    // Try to instantiate the named GraphicsExample class	    try {		Class exampleClass = Class.forName(classname);		examples[i] = (GraphicsExample) exampleClass.newInstance();	    }	    catch (ClassNotFoundException e) {  // unknown class		System.err.println("Couldn't find example: "  + classname);		System.exit(1);	    }	    catch (ClassCastException e) {      // wrong type of class		System.err.println("Class " + classname + 				   " is not a GraphicsExample");		System.exit(1);	    }	    catch (Exception e) {  // class doesn't have a public constructor		// catch InstantiationException, IllegalAccessException		System.err.println("Couldn't instantiate example: " +				   classname);		System.exit(1);	    }	}	// Now create a window to display the examples in, and make it visible	GraphicsExampleFrame f = new GraphicsExampleFrame(examples);	f.pack();	f.setVisible(true);    }}