painter.java

包含多个java程序

//Painter.java
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.imageio.*;
import .;

/**
 * 主程序
 * @author  袁卫华 0200374
 * @version 1.0 06/24/03
 */

class FaceMenuItem extends JRadioButtonMenuItem
{
	private	String face;

	public FaceMenuItem(String text, String face,boolean selected){
		super(text,selected);
		this.face = face;
	}
	public FaceMenuItem(String text, String face){
		this(text, face, false);
	}

	public String	getFace(){return face;}
}

interface WidgeMediator
{
	void	widgeChanged(Component widge);
}

public class Painter extends JFrame implements ActionListener,WidgeMediator
{
	private String		filename = null;
	private	Picture		picture = new Picture();

	private Container	c = getContentPane();
	private DrawPanel	drawPanel = new DrawPanel();
	private ColorPanel	colorPanel = new ColorPanel(this);
	private ToolPanel	toolPanel = new ToolPanel(this,drawPanel);
	private JToolBar	toolBar = new JToolBar();

	private JButton		newBtn = new JButton(new ImageIcon("res/new.gif")),
						openBtn = new JButton(new ImageIcon("res/open.gif")),
						saveBtn = new JButton(new ImageIcon("res/save.gif")),
						unDoBtn = new JButton(new ImageIcon("res/undo.gif")),
						reDoBtn = new JButton(new ImageIcon("res/redo.gif")),
						clearBtn = new JButton(new ImageIcon("res/clear.gif")),
						abtBtn = new JButton(new ImageIcon("res/about.gif"));
	private JButton		btns[] = {newBtn,openBtn,saveBtn,unDoBtn,reDoBtn,clearBtn,abtBtn};
	private ButtonGroup	faceGrp = new ButtonGroup();

	private JMenuBar	menuBar1 = new JMenuBar();
	private JMenu		fileMenu = new JMenu("File"),
						editMenu = new JMenu("Edit"),
						faceMenu = new JMenu("Look&Feel"),
						helpMenu = new JMenu("Help");
	private JMenu		menus[] = {fileMenu,editMenu,faceMenu,helpMenu};

    private JMenuItem	newf = new JMenuItem("New"),
    					open = new JMenuItem("Open"),
   						save = new JMenuItem("Save"),
   						saveas = new JMenuItem("Save As"),
						exit = new JMenuItem("Exit");
    private JMenuItem	fileItems[] = {newf,open,save,saveas,exit};
    					
    private JMenuItem	unDo = new JMenuItem("Undo"),
 						reDo = new JMenuItem("Redo"),
						clear = new JMenuItem("Clear");
    private JMenuItem	editItems[] = {unDo,reDo,clear};


    private FaceMenuItem	metal = new FaceMenuItem("Metal","javax.swing.plaf.metal.MetalLookAndFeel",true),
 							motif = new FaceMenuItem("Motif","com.sun.java.swing.plaf.motif.MotifLookAndFeel"),
							windows = new FaceMenuItem("Windows","com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
    private JMenuItem	faceItems[] = {metal,motif,windows};

    private JMenuItem	help = new JMenuItem("Help"),
						about = new JMenuItem("About");
    private JMenuItem	helpItems[] = {help,about};

    private JMenuItem	menuItems[][] = {fileItems,editItems,faceItems,helpItems};

    //////////////////////////////////////////////////////////////////////////////
	public Painter(){
		super("画图 0200374 袁卫华");
		c.setLayout(new BorderLayout());
		c.add(toolBar,BorderLayout.NORTH);		
		c.add(toolPanel,BorderLayout.WEST);
		c.add(drawPanel,BorderLayout.CENTER);		
		c.add(colorPanel,BorderLayout.SOUTH);		

		for(int i=0; i<btns.length; ++i){
			toolBar.add(btns[i]);
			btns[i].addActionListener(this);
		}

		for(int i=0; i<menus.length; ++i)
			menuBar1.add(menus[i]);

		for(int i=0; i<fileItems.length; ++i)
			fileMenu.add(fileItems[i]);
		for(int i=0; i<editItems.length; ++i)
			editMenu.add(editItems[i]);
		for(int i=0; i<faceItems.length; ++i){
			faceMenu.add(faceItems[i]);
			faceGrp.add(faceItems[i]);
		}
		for(int i=0; i<helpItems.length; ++i)
			helpMenu.add(helpItems[i]);

		for(int i=0; i<menuItems.length; ++i)
			for(int j=0; j<menuItems[i].length; ++j)
				menuItems[i][j].addActionListener(this);

		newBtn.setToolTipText("create a new picture");
		openBtn.setToolTipText("open a picture");
		saveBtn.setToolTipText("save the current picture");
		unDoBtn.setToolTipText("undo an operation");
		reDoBtn.setToolTipText("redo an operation");
		clearBtn.setToolTipText("clear the picture");
		abtBtn.setToolTipText("about painter");

		setJMenuBar(menuBar1);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		ImageIcon icon = new ImageIcon("res/painter.gif");
		setIconImage(icon.getImage());

		setSize(800, 600);
		setVisible(true);
	}

	public void actionPerformed(ActionEvent e){
		Object src = e.getSource();
		if(src instanceof FaceMenuItem)
			setFace(((FaceMenuItem)src).getFace());
		else if(src==newf || src==newBtn){
			filename = null;
			drawPanel.newPicture();
			setTitle("Painter--New");
		}
		else if(src==open || src==openBtn){
			if(showDlg(JFileChooser.OPEN_DIALOG) != false)
				drawPanel.open(filename);
		}		
		else if(src==save || src==saveBtn){
			if (filename!=null || showDlg(JFileChooser.SAVE_DIALOG)!=false)
				drawPanel.save(filename);
		}		
		else if(src == saveas){
			if (showDlg(JFileChooser.SAVE_DIALOG) != false)
				drawPanel.save(filename);
		}
		else if(src==unDo || src==unDoBtn)
			drawPanel.unDo();
		else if(src==reDo || src==reDoBtn)
			drawPanel.reDo();
		else if(src==clear || src==clearBtn)
			drawPanel.clear();
		else if(src==about || src==abtBtn)
			new AboutDlg();
		else if(src==exit) {
			System.exit(0);
		}
	}

	public void	widgeChanged(Component widge){
		if(widge == colorPanel)
			toolPanel.setColor(colorPanel.getColor());
		else if(widge == toolPanel)
			drawPanel.setTool(toolPanel.getTool());
	}

	private boolean	showDlg(int dlgType) {
		JFileChooser chooser = new JFileChooser();

		chooser.setDialogType(dlgType);
		if((chooser.showDialog(null,null) != JFileChooser.APPROVE_OPTION))
			return	false;
		filename = chooser.getSelectedFile().getPath();
		setTitle("Painter--" + filename);
		return	true;
	}

	private void	setFace(String face){
		try{
			UIManager.setLookAndFeel(face);
		}catch(Exception e){return;}
		SwingUtilities.updateComponentTreeUI(toolBar);
		SwingUtilities.updateComponentTreeUI(toolPanel);
		SwingUtilities.updateComponentTreeUI(colorPanel);
		SwingUtilities.updateComponentTreeUI(drawPanel);
		SwingUtilities.updateComponentTreeUI(menuBar1);
	}

	public static void main(String args[]){
		new Painter();
	}
}