shapemain.java

java编写的画图板课程设计,全套

//#8.15 
//#filename: ShapeMain.java 
import java.awt.BorderLayout; 
import java.awt.Button; 
import java.awt.Color; 
import java.awt.Container; 
import java.awt.Graphics; 
import java.awt.Panel; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.event.MouseAdapter; 
import java.awt.event.MouseEvent; 
import java.awt.event.MouseListener; 
import java.awt.event.MouseMotionAdapter; 
import java.awt.event.MouseMotionListener; 

import javax.swing.ButtonGroup; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.UIManager; 
//import javax.swing.Component; 


public class ShapeMain extends JFrame implements ActionListener,MouseListener,MouseMotionListener{ 
int x,y,x1,y1,x2,y2,width,height; 
boolean isFirstPoint = true; 
//初始化开始画的是线 
int drawType = PaintingGround.LINE; 
//初始化开始不是填充 
boolean isFill = false; 
//添加控件 
ButtonGroup btg = new ButtonGroup(); 
Button btLine = new Button("线"); 
Button btRectangle = new Button("矩形"); 
Button btRound = new Button("圆"); 
Button btEllipse = new Button("椭圆"); 
Button tbFillState = new Button("填充"); 
Button button3 = new Button("文本操作"); 
Button button2 = new Button("清除"); 
Button button1 = new Button("选择颜色"); 

Panel buttonPanel = new Panel(); 
PaintingGround paintingGround = new PaintingGround(); 
//Main Method 
public static void main(String[] args) { 
//设置显示外观 
try{ 
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); 
}catch(Exception e) { 
e.printStackTrace(); 
} 
new ShapeMain(); 
} 

//构造函数 
public ShapeMain() { 
//控件添加到控件组中 
// btg.add(btLine); 
// btg.add(btRectangle); 
// btg.add(btRound); 
// btg.add(btEllipse); 


buttonPanel.add(btLine); 
buttonPanel.add(btRectangle); 
buttonPanel.add(btRound); 
buttonPanel.add(btEllipse); 
buttonPanel.add(tbFillState); 

//设置容器及容器的整体布局 
Container cp = this; 

cp.setLayout(new BorderLayout()); 

cp.add(BorderLayout.NORTH,buttonPanel); 
cp.add(BorderLayout.CENTER,paintingGround); 
//cp.add(BorderLayout.SOUTH,jf); 
//jf.setJMenuBar(mb); 
setLocation(300,150); 
setSize(450,320); 
setVisible(true); 

setDefaultCloseOperation(EXIT_ON_CLOSE); 
//添加鼠标触发事件 
paintingGround.addMouseListener(new MouseAdapter() { 
public void mouseReleased(MouseEvent evn) { 
isFirstPoint = true; 
} 
}); 
//对鼠标的输入进行判断并调用画图程序 
paintingGround.addMouseMotionListener(new MouseMotionAdapter() { 
public void mouseDragged(MouseEvent evn) { 
if(isFirstPoint) { 
x1 = evn.getX(); 
y1 = evn.getY(); 
isFirstPoint = false; 
} 
else { 
x2 = evn.getX(); 
y2 = evn.getY(); 
switch(drawType) { 
case PaintingGround.LINE: 
//画线 
paintingGround.drawLine(x1,y1,x2,y2); 
break; 
case PaintingGround.RECTANGLE: 
//画矩形
paintingGround.drawRect(x1,y1,x2-x1,y2-y1); 
break; 
case PaintingGround.ROUND: 
//画圆 
//两点距离公式 
int size = Math.abs((int)Math.sqrt((x2-x1)*(x2-x1) + (y2-y1)*(y2-y1))); 
paintingGround.drawRound(x1,y1,size); 
break; 
case PaintingGround.ELLIPSE: 
//画椭圆 
paintingGround.drawEllipse(x1,y1,x2-x1,y2-y1); 
break; 
default: 
break; 
} 
} 
} 
}); 
//各个控件的触发事件 
btLine.addActionListener(new ActionListener(){ 
public void actionPerformed(ActionEvent evn) { 
drawType = PaintingGround.LINE; 
} 
}); 

btRectangle.addActionListener(new ActionListener(){ 
public void actionPerformed(ActionEvent evn) { 
drawType = PaintingGround.RECTANGLE; 
} 
}); 

btRound.addActionListener(new ActionListener(){ 
public void actionPerformed(ActionEvent evn) { 
drawType = PaintingGround.ROUND; 
} 
}); 

btEllipse.addActionListener(new ActionListener(){ 
public void actionPerformed(ActionEvent evn) { 
drawType = PaintingGround.ELLIPSE; 
} 
}); 

tbFillState.addActionListener(new ActionListener(){ 
public void actionPerformed(ActionEvent evn) { 
isFill = tbFillState.isShowing(); 
paintingGround.setFillState(isFill); 
} 
}); 
} 

public void actionPerformed(ActionEvent e) { 
// TODO Auto-generated method stub 

} 

public void mouseClicked(MouseEvent e) { 
// TODO Auto-generated method stub 

} 

public void mousePressed(MouseEvent e) { 
// TODO Auto-generated method stub 

} 

public void mouseReleased(MouseEvent e) { 
// TODO Auto-generated method stub 

} 

public void mouseEntered(MouseEvent e) { 
// TODO Auto-generated method stub 

} 

public void mouseExited(MouseEvent e) { 
// TODO Auto-generated method stub 

} 

public void mouseDragged(MouseEvent e) { 
// TODO Auto-generated method stub 

} 

public void mouseMoved(MouseEvent e) { 
// TODO Auto-generated method stub 

} 
} 

class PaintingGround extends JPanel { 
public static final int LINE = 1; 
public static final int RECTANGLE = 2; 
public static final int ROUND = 3; 
public static final int ELLIPSE = 4; 

private int x,y; 
private int x1,y1,x2,y2; 
private int width, height,size; 
private int drawType = 0; 
private boolean isFill = false; 
//构造函数 
public PaintingGround() { 
setBackground(Color.black); 
} 
//判断是用实心还是空心的, 
public void paint(Graphics g) { 
super.paint(g); 
g.setColor(Color.blue); 
if(isFill) { 
switch(drawType) { 
case LINE: 
g.drawLine(x1,y1,x2,y2); 
break; 
case RECTANGLE: 
g.fillRect(x,y,width,height); 
break; 
case ROUND: 
g.fillOval(x,y,size,size); 
break; 
case ELLIPSE: 
g.fillOval(x,y,width,height); 
break; 
default: 
break; 
} 
} 
else { 
switch(drawType) { 
case LINE: 
g.drawLine(x1,y1,x2,y2); 
break; 
case RECTANGLE: 
g.drawRect(x,y,width,height); 
break; 
case ROUND: 
g.drawOval(x,y,size,size); 
break; 
case ELLIPSE: 
g.drawOval(x,y,width,height); 
break; 
default: 
break; 
} 
} 
} 

public void drawLine(int x1, int y1, int x2,int y2) { 
this.x1 = x1; 
this.y1 = y1; 
this.x2 = x2; 
this.y2 = y2; 

drawType = LINE; 
repaint(); 
} 
//具体的实现方式 
public void drawRect(int x,int y,int width, int height) { 
this.x = x; 
this.y = y; 
this.width = width; 
this.height = height; 
drawType = RECTANGLE; 
repaint(); 
} 

public void drawRound(int x,int y,int size) { 
this.x = x; 
this.y = y; 
this.size = size; 
drawType = ROUND; 
repaint(); 
} 

public void drawEllipse(int x,int y,int width,int height) { 
this.x = x; 
this.y = y; 
this.width = width; 
this.height = height; 
drawType = ELLIPSE; 
repaint(); 
} 

public void setFillState(boolean isFill) { 
this.isFill = isFill; 
} 

}