package com.mwq.mwing;

import java.awt.Graphics;
import java.awt.GridBagLayout;
import java.awt.Image;
import java.net.URL;

import javax.swing.ImageIcon;
import javax.swing.JPanel;

public class MPanel extends JPanel {

	private ImageIcon imageIcon;// 聲明一個圖片對象

	public MPanel(URL imgUrl) {
		super();// 繼承父類的構造方法
		setLayout(new GridBagLayout());// 將布局管理器修改為網格組布局
		imageIcon = new ImageIcon(imgUrl);// 根據傳入的URL創建ImageIcon對象
		setSize(imageIcon.getIconWidth(), imageIcon.getIconHeight());// 設置面板與圖片等大
	}

	protected void paintComponent(Graphics g) {// 重寫JPanel類的paintComponent()方法
		super.paintComponent(g);// 調用JPanel類的paintComponent()方法
		Image image = imageIcon.getImage();// 通過ImageIcon對象獲得Image對象
		g.drawImage(image, 0, 0, null);// 繪制Image對象，即將圖片繪制到面板中
	}

}