buildwindow.java

用java语言做的L语言编译器

package llanguage;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FileDialog;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

import scanner.Scanner;
import gen.Gen;

public class BuildWindow extends JFrame implements ActionListener {
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	private final int WINWIDTH = 800; // 窗口大小

	private final int WINHEIGHT = 600;

	private JPanel jPanelForTa = new JPanel(); // 用于包装taPro,taSpace,taInfo的JPanel容器

	private JPanel jPanelForButton = new JPanel(); // 用于包装Button的JPanel容器

	private JScrollPane jspP;

	private JScrollPane jspI;

	private JTextArea taProName; // 程序输入区

	private JTextArea taSpace; // 用于隔开taPro和taInfo

	private JTextArea taInfo; // 用于显示编译结果

	private JButton scanner; // 五个按钮

	private JButton parser;

	private JButton attr;

	private JButton gen;

	private JButton open;

	FileDialog fileDialog; // 询问方式获取文件名

	String filePath;

	String fileName="";

	void init() { // 初始化
		this.setSize(WINWIDTH, WINHEIGHT); // 设置窗口大小
		this.setTitle("Compiler of Language L");
		this.setLayout(new BorderLayout());
		this.setResizable(false);

		jPanelForTa = new JPanel(); // 实例化
		jPanelForButton = new JPanel();

		taProName = new JTextArea("", 10, 40); // 文本区实例化
		taSpace = new JTextArea("Information of this programe", 1, 60);
		taInfo = new JTextArea("", 18, 40);

		scanner = new JButton("Scanner"); // 按钮实例化
		parser = new JButton("Parser");
		parser.setEnabled(false);
		attr = new JButton("Attr");
		attr.setEnabled(false);
		gen = new JButton("Gen");
		open = new JButton("Open");

		jPanelForTa.setLayout(new BorderLayout()); // 设置相应参数

		taProName.setBackground(new Color(220, 255, 220));
		taProName.setEditable(false);

		taSpace.setBackground(new Color(200, 200, 200));
		taSpace.setEditable(false);

		taInfo.setBackground(new Color(220, 255, 220));
		taInfo.setEditable(false);

		jspP = new JScrollPane(taProName); // 滚动条
		jspI = new JScrollPane(taInfo);

		jPanelForButton.add(scanner); // 添加实例
		jPanelForButton.add(parser);
		jPanelForButton.add(attr);
		jPanelForButton.add(gen);
		jPanelForButton.add(open);

		jPanelForTa.add(jspP, "North");
		jPanelForTa.add(taSpace, "Center");
		jPanelForTa.add(jspI, "South");

		this.add(jPanelForTa, "North");
		this.add(jPanelForButton, "South");
		this.setVisible(true);

		scanner.addActionListener(this); // 按钮添加监听事件
		parser.addActionListener(this);
		attr.addActionListener(this);
		gen.addActionListener(this);
		open.addActionListener(this);
		fileDialog = new FileDialog(this, "选择文件");

	}

	public JTextArea gettaProName() {

		return taProName;
	}

	public JTextArea gettaInfo() {
		return taInfo;
	}

	public String getFilePath() {
		return filePath;
	}

	public String getFileName() {
		return fileName;
	}

	public void actionPerformed(ActionEvent arg) {
		if (arg.getSource() == open) {
			try {
				fileDialog.setVisible(true);
				filePath = fileDialog.getDirectory();
				fileName = fileDialog.getFile();
				if (!fileName.endsWith(".txt")) {
					JOptionPane.showMessageDialog(null,
							"Please choose a text file");
					return;
				}
				taProName.append("You have chosen this file: " + filePath
						+ fileName + "\n");
			} catch (NullPointerException npe) {

			}
		}
		if (arg.getSource() == scanner) {
			Scanner s = new Scanner();
			s.startScanner();
		}
		if (arg.getSource() == parser) {
			
		}
		if (arg.getSource() == attr) {

		}
		if (arg.getSource() == gen) {
			Gen g=new Gen();
			g.startGen();
		}
		
	}
	private static BuildWindow bw;
	static{
		bw=new BuildWindow();
	}
	public static BuildWindow getBuildWindow()
	{
		return bw;
	}
	
}