myfontdlg.java

一般记事本的功能

package notepad;

import javax.swing.*;
import javax.swing.event.*;

import java.awt.*;
import java.awt.event.*;

public class MyFontDlg extends JDialog implements ListSelectionListener, ActionListener {

	//private JFrame frame;
	private JLabel     font_label, type_label, size_label;
	private JTextField font_field, type_field, size_field;
	private JList      font_list,  type_list,  size_list;
	
	private JPanel label_panel, field_panel, list_panel;
	private JPanel button_panel, all;
	
	private JScrollPane font_scroll, size_scroll;
	
	private JButton okay, cancle;
	
	GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
	private final String[] font_name = ge.getAvailableFontFamilyNames();
	
	//private final String[] font_name = new String[6];
	private final String[] font_type = {"常规", "粗体", "斜体", "粗斜体"};
	private final String[] font_size = {"5", "8", "9", "11", "16", "20", "22"};
	
	
	//the properity to other class
	private Font font;
	
	public MyFontDlg (Frame owner, String title, boolean modal) {
		super(owner, title, modal);

		//frame = new JFrame();
		font = null;
		/*for (int i=0; i<6; ++i) {
			font_name[i] = sys_font_name[i+20];
		}*/
		
		font_label = new JLabel("字体");
		type_label = new JLabel("字形");
		size_label = new JLabel("大小");
		
		font_field = new JTextField(10);
		type_field = new JTextField(6);
		size_field = new JTextField(4);
		
		font_list = new JList(font_name);
		type_list = new JList(font_type);
		size_list = new JList(font_size);
		
		label_panel = new JPanel();
		field_panel = new JPanel();
		list_panel = new JPanel();
		button_panel = new JPanel();
		all = new JPanel();
		
		font_scroll = new JScrollPane(font_list);
		size_scroll = new JScrollPane(size_list);
		
		okay = new JButton("确定");
		cancle = new JButton("取消");

		label_panel.setLayout(new GridLayout(1,3));
		field_panel.setLayout(new FlowLayout());
		list_panel.setLayout(new  GridLayout(1,3));
		button_panel.setLayout(new FlowLayout());
		/*
		label_panel.setLayout(new FlowLayout());
		field_panel.setLayout(new FlowLayout());
		list_panel.setLayout(new  FlowLayout());
		button_panel.setLayout(new FlowLayout());
		*/
		
		font_list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		type_list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		size_list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		
		font_list.setVisibleRowCount(6);
		type_list.setVisibleRowCount(6);
		size_list.setVisibleRowCount(6);
		
		font_list.setAutoscrolls(true);
		type_list.setAutoscrolls(true);
		size_list.setAutoscrolls(true);
		
		font_list.addListSelectionListener(this);
		type_list.addListSelectionListener(this);
		size_list.addListSelectionListener(this);
		
		okay.addActionListener(this);
		cancle.addActionListener(this);
		
		label_panel.add(font_label);
		label_panel.add(type_label);
		label_panel.add(size_label);
		
		field_panel.add(font_field);
		field_panel.add(type_field);
		field_panel.add(size_field);
		/*
		list_panel.add(font_list);
		list_panel.add(type_list);
		list_panel.add(size_list);*/
		

		list_panel.add(font_scroll);
		list_panel.add(type_list);
		list_panel.add(size_scroll);
		
		button_panel.add(okay);
		button_panel.add(cancle);
		
		all.setLayout(new BorderLayout());
		all.add(label_panel, BorderLayout.NORTH);
		all.add(field_panel, BorderLayout.CENTER);
		all.add(list_panel, BorderLayout.SOUTH);
		
		this.setLayout(new BorderLayout());
		this.add(all, BorderLayout.NORTH);
		this.add(button_panel, BorderLayout.CENTER);
		
		this.setVisible(true);
		this.setSize(360,260);
		this.setLocation(100, 100);
		//this.setDefaultCloseOperation(JDialog.EXIT_ON_CLOSE);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}

	public void valueChanged(ListSelectionEvent lse) {
		if (font_list == lse.getSource() ) {
			font_field.setText(font_list.getSelectedValue().toString());
		}
		if (type_list == lse.getSource() ) {
			type_field.setText(type_list.getSelectedValue().toString());
		}
		if (size_list == lse.getSource() ) {
			size_field.setText(size_list.getSelectedValue().toString());
		}
	}
	

	public void actionPerformed(ActionEvent ae) {
		if (okay == ae.getSource() ) {
			int style = 0;
			
			if ("常规".equals(type_field.getText())) {
				style = Font.PLAIN;
			}
			if ("粗体".equals(type_field.getText())) {
				style = Font.BOLD;
			}
			if ("斜体".equals(type_field.getText())) {
				style = Font.ITALIC;
			}
			if ("粗斜体".equals(type_field.getText())) {
				style = Font.ITALIC | Font.BOLD;
			}
			//System.out.println(style);
			this.font = new Font(font_field.getText(), style, 
					Integer.parseInt(size_field.getText()));
			
			exitFontDlg();
		}
		if (cancle == ae.getSource() ) {
			exitFontDlg();
		}
	}
	
	public Font getFont() {
		return this.font;
	}
	
	public void setFontDlgSize(int x, int y) {
		this.setSize(x, y);
	}
	
	private void exitFontDlg() {
		this.setVisible(false);
	}

	public static void main(String[] args) {
		//new MyFontDlg();
	}

}