huatu_program.java

实现了简单的画图功能。如画圆画线画矩形等等。。

					R = colorarray[count][0];
					G = colorarray[count][1];
					B = colorarray[count][2];
					
				    itemList[index].R=R;
				    itemList[index].G=G;
				    itemList[index].B=B;
				}
			}
		}
	}
														
    public class MouseEventA extends MouseAdapter
    {
    	
        public void mouseReleased( MouseEvent e )
		{
			text.setText("鼠标释放:[" + e.getX() + ", " + e.getY() + "]");
            
            if(currentChoice == 0 || currentChoice == 1)
            {
            	itemList[index].x1 = e.getX();
    	    	itemList[index].y1 = e.getY(); 
    	    }
    	    if(huabucolor_Choice == 10)
    	    {
    	    	huabucolor_Choice ++;    	    	
    	    }
    	    else
    	    {
	    	    itemList[index].x2=e.getX();
			    itemList[index].y2=e.getY();
			    a = e.getX();
			    b = e.getY();
			    repaint();
			    index ++;
			    createNew();
		     }

		}
		
    	public void mousePressed( MouseEvent e )
    	{
    		text.setText("鼠标点击:[" + e.getX() + ", " + e.getY() + "]");    	        	    
    	    
    	    itemList[index].x1 = itemList[index].x2 = e.getX();
    	    itemList[index].y1 = itemList[index].y2 = e.getY();
    	    
    	    if(currentChoice ==0 || currentChoice == 1)
		    {
			     itemList[index].x1=itemList[index].x2=e.getX();
			     itemList[index].y1=itemList[index].y2=e.getY();
			     index ++;
			     createNew();
		    }
		    if(huabucolor_Choice == 10)
		    {
		    	 drawingArea.setBackground(new Color(R,G,B));
		    	 R = G = B = 0;	
		    	 itemList[index].R=R;
				 itemList[index].G=G;
				 itemList[index].B=B;	    	 
		    }		    
		    if(currentChoice == 2)
		    {
		    	if(record == 1)
		    	{
		    		itemList[index].x1 = e.getX();
		    		itemList[index].y1 = e.getY();
		    		record ++;
		    	}
		    	else
		    	{
		    	    itemList[index].x1 = a;
		    	    itemList[index].y1 = b;
		    	}
		    }
		}
		
		public void mouseEntered( MouseEvent e )
		{
			text.setText("鼠标进入:[" + e.getX() + ", " + e.getY() + "]");
		}
		
		public void mouseExited( MouseEvent e )
		{
			text.setText("鼠标离开:[" + e.getX() + ", " + e.getY() + "]");  
		}
	}
	
	public class MouseEventB extends MouseMotionAdapter
	{
		public void mouseDragged( MouseEvent e )
		{
			text.setText("鼠标拖动:[" + e.getX() + ", " + e.getY() + "]");
			
			if(currentChoice == 0 || currentChoice == 1)
			{
				itemList[index-1].x1 = itemList[index].x2 = itemList[index].x1 = e.getX();
			    itemList[index-1].y1 = itemList[index].y2 = itemList[index].y1 = e.getY();
			    index ++;
			    createNew();
			} 
			else
			{
				itemList[index].x2 = e.getX();
				itemList[index].y2 = e.getY();
			}
			repaint();
		}
		
		public void mouseMoved( MouseEvent e )
		{
			text.setText("鼠标移动:[" + e.getX() + ", " + e.getY() + "]");
		}
	}
	
	public class DrawPanel extends JPanel
	{
		public DrawPanel()
		{
			setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
			setBackground(Color.white);
			addMouseListener(new MouseEventA());
			addMouseMotionListener(new MouseEventB());
	    }
	    
	    public void paintComponent(Graphics g)
	    {
	    	super.paintComponent(g);
	    	
	    	Graphics2D g2 = (Graphics2D) g;
	    	int i = 0;
	    	while(i <= index)
	    	{
	    		 drawPicter(g2,itemList[i]);
	    		 i ++;
	    	}	    	
	    }
	    
	    public void drawPicter(Graphics2D g2,Drawings draws)
	    {
	    	draws.Draw(g2);
	    }
	 }
	 
	 public void createNew()
	 {
	 	setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
	 		 	
	 	switch(currentChoice)
	 	{
	 		case 0:	 		      
	 		      itemList[index] = new Rubber();
	 		      record = 1;
	 		      break;
	 		case 1:
	 		       itemList[index] = new Pencil();
	 		       record = 1;
	 		       break;
	 		case 2:
	 		       itemList[index] = new Quxian();
	 		       break;
	 		case 3:
	 		       itemList[index] = new Line();
	 		       record = 1;
	 		       break;
	 		case 4:
	 		       itemList[index] = new FillRect();
	 		       record = 1;
	 		       break;
	 		case 5:
	 		       itemList[index] = new Rect();
	 		       record = 1;
	 		       break;
	 		case 6:
	 		       itemList[index] = new FillOval();
	 		       record = 1;
	 		       break;	 		       
	 		case 7:
	 		       itemList[index] = new Oval();
	 		       record = 1;
	 		       break;
	 		case 8:
	 		       itemList[index] = new RoundRect();
	 		       record = 1;
	 		       break;
	   }
	   
	itemList[index].drawType=currentChoice;
    itemList[index].R=R;
    itemList[index].G=G;
    itemList[index].B=B;
    itemList[index].stroke=stroke;
    }
    
    public void setHuabi()
	{
	   String input;
	   input=JOptionPane.showInputDialog("请输入画笔的粗细大小（>0)");
	          
	   stroke = Float.parseFloat(input);
	   itemList[index].stroke=stroke;
	 }
    
    
    public void colorChoose()
    {
	    color=JColorChooser.showDialog(Huatu_Program.this,"编辑颜色",color);
	                          
	    R=color.getRed();
	    G=color.getGreen();
	    B=color.getBlue();
	    itemList[index].R=R;
	    itemList[index].G=G;
	    itemList[index].B=B;
	}
	
   public static void main(String args[])
   {
   	  try 
   	  {
        UIManager.setLookAndFeel( UIManager.getSystemLookAndFeelClassName());
      }
      catch ( Exception e ) {}

      Huatu_Program hp=new Huatu_Program();
      hp.addWindowListener(
          new WindowAdapter()
          {
             public void windowClosing(WindowEvent e)
             {
             	System.exit(0);
             }
          });
  }
}    

class Drawings
{
	int x1,y1;
	int x2,y2;
	int R,G,B;
	int drawType;
	float stroke;		
	void Draw(Graphics2D g2){};
}

class Rubber extends Drawings
{
	
	public void Draw(Graphics2D g2)
	{
		g2.setPaint(new Color(255,255,255));
		g2.setStroke(new BasicStroke(stroke));
		g2.drawLine(x1,y1,x2,y2);
	}
}

class Pencil extends Drawings
{
	public void Draw(Graphics2D g2)
	{
		g2.setPaint(new Color(R,G,B));
		g2.setStroke(new BasicStroke(stroke));
		g2.drawLine(x1,y1,x2,y2);
	}
}
	
class Quxian extends Drawings
{
	public void Draw(Graphics2D g2)
	{
		g2.setPaint(new Color(R,G,B));
		g2.setStroke(new BasicStroke(stroke));
		g2.drawLine(x1,y1,x2,y2);
	}
}

class Line extends Drawings
{
	public void Draw(Graphics2D g2)
	{
		g2.setPaint(new Color(R,G,B));
		g2.setStroke(new BasicStroke(stroke));
		g2.drawLine(x1,y1,x2,y2);
	}
}

class Rect extends Drawings
{
	public void Draw(Graphics2D g2)
	{
		g2.setPaint(new Color(R,G,B));
		g2.setStroke(new BasicStroke(stroke));
		g2.drawRect(Math.min(x1,x2),Math.min(y1,y2),Math.abs(x1-x2),Math.abs(y1-y2));	
	}
}

class FillRect extends Drawings
{
	public void Draw(Graphics2D g2)
	{
		g2.setPaint(new Color(R,G,B));
		g2.setStroke(new BasicStroke(stroke));
		g2.fillRect(Math.min(x1,x2),Math.min(y1,y2),Math.abs(x1-x2),Math.abs(y1-y2));	
	}
}

class Oval extends Drawings
{
	public void Draw(Graphics2D g2)
	{
		g2.setPaint(new Color(R,G,B));
		g2.setStroke(new BasicStroke(stroke));
		g2.drawOval(Math.min(x1,x2),Math.min(y1,y2),Math.abs(x1-x2),Math.abs(y1-y2));
	}
}

class FillOval extends Drawings
{
	public void Draw(Graphics2D g2)
	{
		g2.setPaint(new Color(R,G,B));
		g2.setStroke(new BasicStroke(stroke));
		g2.fillOval(Math.min(x1,x2),Math.min(y1,y2),Math.abs(x1-x2),Math.abs(y1-y2));
	}
}

class RoundRect extends Drawings
{
	public void Draw(Graphics2D g2)
	{
		g2.setPaint(new Color(R,G,B));
		g2.setStroke(new BasicStroke(stroke));
		g2.drawRoundRect(Math.min(x1,x2),Math.min(y1,y2),Math.abs(x1-x2),Math.abs(y1-y2),30,30);
	}
}