package?com;

import?java.awt.BorderLayout;
import?java.awt.Color;
import?java.awt.FlowLayout;
import?java.awt.Graphics;
import?java.awt.Point;
import?java.awt.event.ActionEvent;
import?java.awt.event.ActionListener;
import?java.awt.event.MouseEvent;
import?java.awt.event.MouseListener;

import?javax.swing.Jframe;
import?javax.swing.JLabel;
import?javax.swing.JMenu;
import?javax.swing.JMenuBar;
import?javax.swing.JMenuItem;
import?javax.swing.JOptionPane;
import?javax.swing.JPanel;
import?javax.swing.JTextField;

public?class?CGAlgorithm?extends?Jframe?{

	JMenuBar?mub_main;
	JMenu?mu_linemu_circle;
	JMenuItem?it_dda?it_mid?it_breit_midcir;
	JLabel?lb_beg?lb_end;
	JTextField?txf_beg?txf_end;
	Point?spos?epos;
	Graphics?g;
	JPanel?Draw_p;
	String?state?=?“DDA“;
	int?add_x=300add_y=150;//圓心坐標(biāo)
	
	public?CGAlgorithm（）?{
		//?TODO?Auto-generated?constructor?stub
		settitle（“計(jì)算機(jī)圖形學(xué)算法實(shí)現(xiàn)“）;
		setSize（610?400）;
		spos?=?new?Point（）;
		epos?=?new?Point（）;

		mub_main?=?new?JMenuBar（）;
		mu_line?=?new?JMenu（“直線繪制算法“）;
		mub_main.add（mu_line）;
		
		mu_circle=new?JMenu（“圓繪制算法“）;
		mub_main.add（mu_circle）;

		it_dda?=?new?JMenuItem（“DDA算法“）;
		it_dda.addActionListener（new?ActionListener（）?{

			@Override
			public?void?actionPerformed（ActionEvent?arg0）?{
				//?TODO?Auto-generated?method?stub
				state?=?“DDA“;
			}
		}）;
		mu_line.add（it_dda）;

		it_mid?=?new?JMenuItem（“中點(diǎn)劃線算法“）;
		it_mid.addActionListener（new?ActionListener（）?{

			@Override
			public?void?actionPerformed（ActionEvent?e）?{
				//?TODO?Auto-generated?method?stub
				state?=?“Mid“;
			}
		}）;
		mu_line.add（it_mid）;

		it_bre?=?new?JMenuItem（“Bresenham算法“）;
		it_bre.addActionListener（new?ActionListener（）?{

			@Override
			public?void?actionPerformed（ActionEvent?e）?{
				//?TODO?Auto-generated?method?stub
				state?=?“Bre“;
			}
		}）;
		mu_line.add（it_bre）;

		it_midcir=new?JMenuItem（“中點(diǎn)畫圓算法“）;
		mu_circle.add（it_midcir）;
		it_midcir.addActionListener（new?ActionListener（）?{
			
			@Override
			public?void?actionPerformed（ActionEvent?e）?{
				//?TODO?Auto-generated?method?stub
				String?r=JOptionPane.showInputDialog（null“請輸入圓的半徑：““數(shù)值輸入“JOptionPane.QUESTION_MESSAGE）;
				if（!r.trim（）.equals（““））
					MidPointCircle（Integer.parseInt（r））;
			}
		}）;
		setJMenuBar（mub_main）;

		Draw_p?=?new?JPanel（）;
		Draw_p.setBackground（Color.white）;
		add（Draw_p?BorderLayout.CENTER）;

		JPanel?Msg_p?=?new?JPanel（new?FlowLayout（FlowLayout.CENTER?15?5））;
		lb_beg?=?new?JLabel（“起點(diǎn)坐標(biāo)：“）;
		Msg_p.add（lb_beg）;
		txf_beg?=?new?JTextField（5）;
		txf_beg.setEditable（false）;
		Msg_p.add（txf_beg）;
		lb_end?=?new?JLabel（“終點(diǎn)坐標(biāo)：“）;
		Msg_p.add（lb_end）;
		txf_end?=?new?JTextField（5）;
		txf_end.setEditable（false）;
		Msg_p.add（txf_end）;
		add（Msg_p?BorderLayout.SOUTH）;

		Draw_p.addMouseListener（new?MouseListener（）?{

			@Override
			public?void?mouseReleased（MouseEvent?e）?{
				//?TODO?Auto-generate