application.java

一个简易的java画图软件

package app;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;
import javax.swing.UIManager;

import draw.Draw;

import app.action.Actions;
import app.pane.MenuPane;
import app.pane.PaintPane;

/**
 * 主窗口，定义了一些关于程序自身的常量
 * 
 * @author Thihy
 * 
 */
public class Application extends JFrame {
	/**
	 * 用于DEBUG，会输出大量信息。值越大，则其输出越多
	 */
	public static final int DEBUG = 0;
	public static final String APPNAME = "画图";
	public static final String ABOUT_APP = "这是一个用java编写的画图软件。\r\n\r\nCopyright@ 黄兴海 。";

	/**
	 * 保存文件的主后缀名
	 */
	public static final String viewfileSuffix = "pnt";

	protected PaintPane paintPane;
	private MenuPane menuPane;
	protected Draw draw;

	protected Actions actions = new Actions(this);

	/**
	 * 生成窗口
	 */
	public Application() {
		super();
		setTitle(Application.APPNAME);

		menuPane = new MenuPane(this);
		draw = new Draw(this);
		paintPane = new PaintPane(draw, this);
		add(paintPane, BorderLayout.WEST);
		add(draw.getContentPane(), BorderLayout.CENTER);

		setJMenuBar(menuPane.getMenuBar());

		setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
		addWindowListener(new WindowAdapter() {

			@Override
			public void windowClosing(WindowEvent e) {
				if (getDraw().closeAllViews()) {
					dispose();
					System.exit(0);
				}

			}
		});
		setSize(1000, 600);
		moveToCenter();
		setVisible(true);
	}

	/**
	 * 返回主画板。这个画板中会有多个画布
	 * 
	 * @return 主画板
	 */
	public Draw getDraw() {
		return draw;
	}

	/**
	 * 获取菜单栏
	 * 
	 * @return 菜单栏
	 */
	public MenuPane getMenuPane() {
		return menuPane;
	}

	private void moveToCenter() {
		Toolkit kit = Toolkit.getDefaultToolkit();
		Dimension screenSize = kit.getScreenSize();
		int screenHeight = screenSize.height;
		int screenWidth = screenSize.width;
		Dimension frameSize = getSize();
		int frameHeight = frameSize.height;
		int frameWidth = frameSize.width;
		int centerLocationX = (screenWidth - frameWidth) / 2;
		int centerLocationY = (screenHeight - frameHeight) / 2;
		setLocation(centerLocationX, centerLocationY);
	}

	/**
	 * 程序入口
	 * @param args 程序参数
	 */
	public static void main(String[] args) {
		try {
			UIManager.setLookAndFeel(UIManager
					.getCrossPlatformLookAndFeelClassName());
		} catch (Exception exc) {
			System.err.println("Error loading L&F: " + exc);
		}
		try {
			System.setProperty("sun.awt.noerasebackground", "true");
		} catch (NoSuchMethodError error) {
		}

		new Application();
	}
}