minidrawpad.java

java 编的画图版

/***************************************
file name: minidrawpad
copyright by:****
dept:  **********************
date:  2007.10.10
version:  1.00
*****************************************/

package MiniDrawPad;
//导入相应的包
import Java.awt.*;
import Java.awt.grom.*;
import Java.awt.event.*;
import Javax.swing.*;
import Java.io.*;
import Java.util.*;

public class MiniDrawPad extends JFrame //主类，扩展了JFrame类，用来生成主界面
{
private ObjectInputStream input;
private ObjectOutputStream output;//定义输入输出流，用来调用和保存图像文件

private JButton choices[];   //按钮数组，存放一下名称的功能按钮

private  String name[]={
"New",
"Open",
"Save",    //基本按钮
"Pencil",    //绘制直线
"Line",     //绘制空心矩形
"fRect",    //绘制指定颜色填充的实心矩形
"Oval",     //绘制空心椭圆
"fOval",    //
"Circle",
"fcircle",
"RoundRect",
"frRect",
"Rubber",
"color",
"Stroke",
"Word",
};

private Sting styleNames[]={
"Time New Roman","Serif","Monospaced",
"sonsSerif","Garamond"
};   //可供选择的字体项

private Icon items[];
private String tipText[]={
"Draw a new picture",
"Open a saved picture",
"Save current drawing",
"Draw at will",
"Draw a straight line",
"Draw a rectangle",
"Fill a ractangle",
"Draw an oval",
"Fill an oval",
"Draw a circle",
"Fill a circle",
"Draw a round rectangle",
"Fill a round rectangle",
"Erase at will",
"Choose current drawing color",
"Set current drawing stroke",
"Write down what u want"
};

JToolBar buttonPanel;
private JLabel statusBar;
private DrawPanel drawingArea;
private int width=800,height=550;
drawings[] itemList=new drawings[5000];
private int currentChioce=3;
int index=0;
private Color color=Color.black;
int R,G,B;

int f1,f2;
String style;
private float stroke=1.0f;

JCheckBox bold,italic;
JComboBox styles;

public MiniDrawPad()
{
super("Drawing Pad");
JMenuBar bar=new JMenuBar();
JMenu fileMenu=JMenu("File");
fileMenu.setMnemonic('F');

JMnuItem newItem=new JMenuItem("NEW");
newItem.setMnemonic('N');
newItem.addActionListener(
        new ActionListener(){
            public void actionperformed(ActionEvent e)
            {
             loadFile();
            }
      }
);
fileMenu.add(saveItem);

JMenItem loadItem=new JMenuItem("Load");
loadItem.setMnemonic('L');
loadItem.addActionListener(
         new ActionListener(){
           public void actionPerformed(ActionEvent e)
           {
           loadFile();
           }
}
);
fileMenu.add(loadItem);
fileMenu.addSeparator();


JMenuItem exitItem=new JMenuItem("Exit");
exitItem.setMnemonic('X');
exitItem.addActionListener(
         new ActionListener(){
             public void actionPerformed(ActionEvent e)
             {
              System.exit(0);
              }
   }
);
fileMenu.add(exitItem);
bar.add(fileMenu);

JMenu colorMenu=new JMenu("color");
colorMenu.setMnemonic('C');


JMenuItem colorItem=JMenuItem("Choose Color");
colorItem.setMnemonic('O');
colorItem.addActionListener(
         new ActionListener(){
             public void actionPerformed(ActionEvent e)
         {
          chooseColor();
          }
}
);
colorMenu.add(colorItem);
bar.add(colorMenu);


JMenu strokeMenu=new JMenu("Stroke");
strokeMenu.setMnemonic('S');  


JMenuItem strokeMenu=new JMenuItem("Set Stroke");
strokeItem.setMnemonic('K');
strokeItem.addActionListener(
           new ActionListener(){
               public void actionPerformed(ActionEvent e)
               {
                steStroke();
               }
               }
);
strokeMenu.add(strokeItem);
bar.add(strokeMenu);

JMenu helpMenu=new JMenu("Help");
helpMenu.setMnemonic('H');


JMenuItem aboutItem=new JMenuItem("About this Drawing Pad!");
aboutItem.setMnemonic('A');
aboutItem.addActionListener(
         new ActionListener(){
             public void actionPerformed(ActionEvent e)
              {
              JOptionPane.showMessageDialog(null,
                 "This is a mini drawingpad!\nCopyright(c)2002Tsinghua University",
                     "introduce",
                    JOptionPane.INFORMATION_MESSAGE);
                        }
                        }
    );
helpMenu.add(aboutItem);
bar.add(helpMenu);

item=new ImageIcon[names.length];

drawingArea=new DrawPanel();
choices=new JButton[names.length];
buttonPanel=new JToolBar(JToolBar.VERTICAL);
buttonPanel=new JToolBar(JToolBar.HORIZONTAL);
ButtonHandler handler=new ButtonHandler();
ButtonHandler1 handler=new ButtonHandler();

for(int i=0;i<choices.length;i++)
{
item[i]=new ImageIcon(names[i]+".gif");
choices[i]=new JButton("",item[i]);
choices[i].setToolTipText(tipText[i]);
buttonPanel.add(choices[i]);
}

for(int i=3;i<choices.length-3;i++)
{
choices[i].addActionListener(handler);
}

choices[0].addActionListener(
          new ActionListener(){
              public void actionPerformed(ActionEvent e)
             {
              newFile();
              }
         }
);

choice[1].addActionListener(
         new ActionListener(){
             public void actionPerformed(ActionEvent e)
             {
              loadFile();
              }
         }
);

choice[2].addActionListener(
         new ActionListener(){
             public void actionPerformed(ActionEvent e)
             {
              saveFile();
              }
         }
);

choices[choices.length-3].addActionListener(handler1);
choices[choices.length-2].addActionListener(handler1);
choices[choices.length-1].addActionListener(handler1);

styles=new JComboBox(styleNames);
styles.setMaximumRowCount(8);
styles.addItemListener(
        new ItemListener(){
             public void itemStateChanged(ItemEvent e)
             {
              style1=styleNames[styles.getSelctedIndex()];
             }
        }
);

bold=new JCheckBox("BOLD");
italic=new JCheckBox("ITALIC");

chackBoxHandler cHandler=new checkBoxHandler();
bold.addItemListener(cHandler);
italic.addItemListener(cHandler);

JPanel wordPanel=new JPanel();
buttonPanel.add(bold);
buttonPanel.add(italic);
buttonPanel.add(styles);
styles.setMinimumSize(new Dimension(50,20));
styles.setMaximumSize(new Dimension(100,20));

Container c=getContentPane();
super.setJMenuBar(bar);
c.add(buttonPanel,BorderLayout.NORTH);
c.add(drawingArea,BorderLayout.CENTER);

statusBar=new JLabel();
c.add(statusBar,BorderLayout.SOUTH);
statusBar.sttText("Welcome To THE Little Drawing Pad!!:)");

createNewItem();
setSize(width,height);

show();
}


public class ButtonHandler implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
for(int j=3;j<choice.length-3;j++)
{
if(e.getSource()==choices[j])
   {currentChoice=j;
    createNewItem();
     repaint();}
      }
      }
    }

public class ButtonHandler1 implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
  if(e.getSource()==choices[choices.length-3])
    {chooseColor();}
  if(e.getSource()==choices[choices.length-2])
    {setColor();}
  if(e.getSource()==choices[choices.length-1])
    {LOptionPane.showMessageDialog(null,
          "Please hit the drawing pad to choose the word input position",
          "Hint",JOptionPane.INGORMATION_MESSAGE);
       currentChoice=14;
        createNewItem();
        repair();
        }
       }
}



class mouseA extends MouseAdapter
{
public void mousePressed(MouseEvent e)
{statusBar.setText("   Mouse pressed@:["+e.getX()+","+e.getY()+"]");
itemList[index].x1=itemList[index].x2=e.getX();
itemList[index].y1=itemList[index].y2=e.getY();

if(currentChoice==3||currentChoice==13)
{
itemList[index].x1=itemList[index].x2=e.getX();
itemList[index].y1=itemList[index].y2=e.getY();
index++;
createNewItem();
}

if(currentChoice==14)
{
itemList[index].x1=e.getX();
itemList[index].y1=e.getY();

String input;
input=JOptionPane.showInputDialog(
      "Please input the text you want!");
itemList[index].s1=input;
itemList[index].x2=f1;
itemList[index].y2=f2;
itemList[index].s2=style;

index++;
currentChoice=14;
createNewItem();
drawingArea.repaint();
}
}

public void mouseReleased(MouseEvent e)
{
	statusBar.setText("Mouse Released@:["+e.getX()+","+e.getY()+"]");
	if(currentChoice==3||curremtChoice==13)
	{
itemList[index].x1=e.getX();
itemList[index].y1=e.getY();
}
itemList[index].x2=e.getX();
itemList[index].y2=e.getY();
repaint();
index++;
createNewItem();
}

public void mouseEntered(MouseEvent e)
{
     	statusBar.setText("Mouse Entered@:["+e.getX()+","+e.getY()+"]");
}

public void mouseExited(MouseEvent e)
{
	statusBar.setText("Mouse Exited@:["+e.getX()+","+e.getY()+"]");
}
}

class mouseB extends MouseMotionAdapter
{
public void mouseDragged(MouseEvent e)
{	statusBar.setText("Mouse Dragged@:["+e.getX()+","+e.getY()+"]");


if(currentChoice==3||currentChoice==13)
{