package picture;

import java.awt.EventQueue;
import java.awt.Font;

import javax.swing.JFrame;
import java.awt.BorderLayout;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextArea;
import javax.swing.JPanel;
import java.awt.GridLayout;
import java.awt.JobAttributes;

import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class JDialogDemo {

	private JFrame frame;

	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					JDialogDemo window = new JDialogDemo();
					window.frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	/**
	 * Create the application.
	 */
	public JDialogDemo() {
		initialize();
	}

	/**
	 * Initialize the contents of the frame.
	 */
	private void initialize() {
		frame = new JFrame();
		frame.setBounds(100, 100, 573, 350);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.getContentPane().setLayout(new BorderLayout(0, 0));

		JLabel label = new JLabel("\u8BF7\u9009\u62E9\u64CD\u4F5C\uFF1A");
		frame.getContentPane().add(label, BorderLayout.NORTH);

		JTextArea textArea = new JTextArea();
		frame.getContentPane().add(textArea, BorderLayout.CENTER);

		JPanel panel = new JPanel();
		frame.getContentPane().add(panel, BorderLayout.SOUTH);
		panel.setLayout(new GridLayout(1, 0, 0, 0));

		JPanel panel_1 = new JPanel();
		panel.add(panel_1);

		JButton btnNewButton = new JButton("\u63D0\u793A");
		/**
		 * JOptionPane.showMessageDialog的三个参数第一个参数是窗口弹出的位置，第二个是消息内容，第三个是标题，第四个是提供的按钮选项（消息类型）
		 **/
		btnNewButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				JOptionPane.showMessageDialog(btnNewButton, "撸起袖子加油干", "消息", JOptionPane.INFORMATION_MESSAGE);
				textArea.append("显示消息对话框\n");
			}
		});
		panel.add(btnNewButton);

		JButton btnNewButton_1 = new JButton("\u8F93\u5165");
		btnNewButton_1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				String strTemp = JOptionPane.showInputDialog(btnNewButton_1, "请输入一个数值：");// 输入类型
				try {
					double num = Double.parseDouble(strTemp); // 把字符串转换为double类型
					// 在文本框中追加内容
					textArea.append(num + "+" + num + "=" + (num + num) + "\n");
				} catch (NumberFormatException e1) {
					textArea.append(strTemp + "不是数值字符串");
				}
			}
		});
		panel.add(btnNewButton_1);

		JButton btnNewButton_2 = new JButton("\u786E\u8BA4\u6E05\u7A7A");
		btnNewButton_2.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				int r = JOptionPane.showConfirmDialog(btnNewButton_2, "您确认要删除文本框中的内容吗？", "确认",
						JOptionPane.YES_NO_OPTION);
				if (r == JOptionPane.YES_OPTION) {
					textArea.setText("");
				} else {
					textArea.append("\n+（取消清除内容）+\n");
				}
			}
		});
		panel.add(btnNewButton_2);

		JButton btnNewButton_3 = new JButton("\u9009\u62E9\u5B57\u4F53");
		btnNewButton_3.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				Object[] fonts = { "宋体", "隶书", "楷体" };
				/*弹出位置，内容，标题，指定可用于对话框的选项的整数，指定消息种类的整数，在对话框中显示的图标，知识用户可能选择的对象组成的数组，如果对象是组件则可以正确呈现，对话框默认选择的对象（前提是第七个参数的对象，前一个）*/
                int option=JOptionPane.showOptionDialog(btnNewButton_3, "选择字体", "选择", JOptionPane.DEFAULT_OPTION, JOptionPane.INFORMATION_MESSAGE, null, fonts, fonts[0]);
                if(option!=JOptionPane.CLOSED_OPTION) {
                	textArea.append("显示选择对话框!");
                	textArea.setFont(new Font(fonts[option].toString(),Font.BOLD,20));
                }
			}
		});
		panel.add(btnNewButton_3);

		JPanel panel_2 = new JPanel();
		panel.add(panel_2);
	}

}