managerpanel.java

多线程简单下载器 j2se实现 多线程简单下载器 j2se实现

package cn.dg.nitpro.globle;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class ManagerPanel extends JPanel implements ActionListener {
	private TaskManagerPanel tasklistpanel;

	JButton stop, start, newtask, deltask;

	public ManagerPanel(TaskManagerPanel tasklistpanel) {
		this.tasklistpanel = tasklistpanel;

		setLayout(new FlowLayout(FlowLayout.CENTER, 10, 5));
		setBackground(Color.WHITE);
		setPreferredSize(new Dimension(600, 40));

		stop = new JButton("停止下载");
		start = new JButton("开始下载");
		newtask = new JButton("新建任务");
		deltask = new JButton("删除任务");

		stop.addActionListener(this);
		start.addActionListener(this);
		newtask.addActionListener(this);
		deltask.addActionListener(this);

		add(stop);
		add(start);
		add(newtask);
		add(deltask);
	}

	public void actionPerformed(ActionEvent e) {
		JButton source = (JButton) e.getSource();

		if (source == newtask) {
			new NewTaskUI((JFrame) this.getParent().getParent(), tasklistpanel)
					.setVisible(true);
			return;
		}

		Component[] taskpanel = tasklistpanel.getComponents();

		TaskPanel t;
		for (int i = 0; i < taskpanel.length; i++) {
			t = (TaskPanel) taskpanel[i];

			if (t.taskname.isSelected()) {
				if (source == start) {
					t.task.start();
				} else if (source == stop) {
					t.task.stop();
				} else if (source == deltask) {
					t.task.stop();
					tasklistpanel.remove(t);

					tasklistpanel.updateUI();
				}
			}
		}
	}
}