import?java.awt.*;
import?java.awt.event.*;
import?java.util.*;

public?class?test?implements?ActionListener{
	frame?f=new?frame（）;//主框架
	canvas?mycanvas=new?canvas（）;
	TextArea?text=new?TextArea（22）;
	
	MenuBar?mb=new?MenuBar（）;
	Menu?menu1menu2menu3menu4;
	MenuItem?mimi11mi12mi21mi31mi41mi42;
	String?menuname;
	String?info;
	
	ArrayList?points=new?ArrayList（）;
	Graphics?g;
	Point?p1p2screen;
	Robot?bt;
	
	line_DDA?line=new?line_DDA（）;
	duobianxing?dbx=new?duobianxing（）;
	saomiao?sm=new?saomiao（）;
	zhongzi?zz=new?zhongzi（）;
	
	public?static?void?main（String?args[]）{
		test?t=new?test（）;
		t.go（）;
	}
	public?void?go（）{
		f.setLayout（new?BorderLayout（））;
		f.add（mycanvasBorderLayout.CENTER）;
		mycanvas.setBackground（Color.white）;
		
		text.setBackground（Color.green）;
		text.setText（“請選擇操作“）;
		text.setEnabled（false）;
		f.add（text?BorderLayout.NORTH）;
		f.setMenuBar（mb）;
		
		f.setSize（500500）;
		
		f.setLocation（200?200）;
		
		f.addWindowListener（new?WindowAdapter（）?{
			public?void?windowClosing（WindowEvent?e）?{
				System.exit（0）;
			}
		}）;
		
		f.setVisible（true）;
		
		menu1=new?Menu（“畫線“）;
		mi11=new?MenuItem（“DDA算法“）;
		menu1.add（mi11）;
		mb.add（menu1）;
		mi11.addActionListener（this）;
		
		menu2=new?Menu（“畫多邊形“）;
		mi21=new?MenuItem（“畫多邊形“）;
		menu2.add（mi21）;
		mb.add（menu2）;
		mi21.addActionListener（this）;
		
		menu3=new?Menu（“畫圓“）;
		mi31=new?MenuItem（“畫圓“）;
		menu3.add（mi31）;
		mb.add（menu3）;
		mi31.addActionListener（this）;
		
		menu4=new?Menu（“填充“）;
		mi41=new?MenuItem（“掃描線填充“）;
		mi42=new?MenuItem（“種子填充“）;
		menu4.add（mi41）;
		menu4.add（mi42）;
		mb.add（menu4）;
		mi41.addActionListener（this）;
		mi42.addActionListener（this）;
		menu4.setEnabled（false）;
		
		Menu?m=new?Menu（“清屏“）;
		mi=new?MenuItem（“清屏“）;
		mb.add（m）;
		m.add（mi）;
		mi.addActionListener（this）;
		
		p1=new?Point（）;
		p2=new?Point（）;
		
		try?{
			bt?=?new?Robot（）;
		}?
		catch?（Exception?e）?{
			System.out.print（e.getMessage（））;			
		}
	}
	
	public?void?init（）{
		mycanvas.removeMouseListener（line）;
		mycanvas.removeMouseListener（dbx）;
		mycanvas.removeMouseListener（sm）;
		mycanvas.removeMouseListener（zz）;
		points.clear（）;
		menuname=““;
		menu4.setEnabled（false）;
	}
	public?void?actionPerformed（ActionEvent?e）{
		String?command=e.getActionCommand（）;
		if（command.equals（“DDA算法“））{
			init（）;
			menuname=“DDA算法“;
			text.setText（“DDA畫線算法：請單擊并拖動鼠標以畫線。“）;
			mycanvas.addMouseListener（line）;
		}
		else?if（command.equals（“畫多邊形“））{
			init（）;
			menuname=“畫多邊形“;
			text.setText（“請單擊鼠標畫出多邊形的端點，右擊表示結束。“）;
			mycanvas.addMouseListener（dbx）;
			menu4.setEnabled（true）;
		}
		else?if（command.equals（“掃描線填充“））{
			mycanvas.removeMouseListener（line）;
			mycanvas.removeMouseListener（dbx）;
			mycanvas.removeMouseListener（sm）;
			mycanvas.removeMouseListener（zz）;
			menu4.setEnabled（false）;
			menuname=“掃描線填充“;
			text.setText（“掃描線填充法，只能填充最新畫的圖形。“）;