fontdialog.java

本程序不仅实现了记事本基本的功能

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package jnotepad;


/**
 *
 * @author Administrator
 */
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.border.*;
import java.util.*;

 class FontDialog
{
	private Dialog fontdialog;
	private JButton okButton,cancelButton;
	private int width=450;
	private int height=250;
	private String name="Serif";
    private int type=0;
    private int size=12;
	private static final int OK_OPTION=0x00001;
	private static final int CANCEL_OPTION=0x00010;
	private Font customFont=new Font("宋体",Font.ITALIC,12);
	private boolean okpressed=false;
	private boolean cancelpressed=false;
	private JLabel lbl1=new JLabel("字体：");
    private JLabel lbl2=new JLabel("字形：");
    private JLabel lbl3=new JLabel("字号：");
    private JTextArea area;
	String[] zx={"平体","加粗","斜体","基线"};
	JLabel lbl=new JLabel("字体样式Style");
	private JComboBox cb1,cb3,cb2=new JComboBox(zx);
	private  Container c;
   	private String[] zt;
   	public FontDialog(Frame owner, String title, boolean modal)
		{
			init();
			fontdialog=new Dialog(owner,title,modal);
			fontdialog.setLocation(owner.getLocation());
			fontdialog.setLayout(new FlowLayout());
			fontdialog.setSize(getWidth(),getHeight());
			fontdialog.add(lbl1);
			fontdialog.add(cb1);
			fontdialog.add(lbl2);
			fontdialog.add(cb2);
			fontdialog.add(lbl3);
			fontdialog.add(cb3);
			fontdialog.add(okButton);
			fontdialog.add(cancelButton);
			fontdialog.add(area);
			fontdialog.setResizable(false);
			//fontdialog.setAlwaysOnTop(true);
			//fontdialog.setBackground(new Color(145,167,220));
			cancelButton.addActionListener(new fontListener());
			okButton.addActionListener(new fontListener());
			fontdialog.addWindowListener(new fontListener());
			cb1.addItemListener(new ItemListener(){
				public void itemStateChanged(ItemEvent event)
		          {
		             int state=event.getStateChange();
              		 name=(String) event.getItem();
					 setCustomFont(new Font(name,type,size));
		          }
				});
      		cb2.addItemListener(new ItemListener()
      		{
      		public void itemStateChanged(ItemEvent event)
	          {
	            int state=event.getStateChange();
              	String s=(String) event.getItem();
              	if (s.equals("平体"))
              	{
                   	   type=Font.PLAIN;
                   	   setCustomFont(new Font(name,type,size));
              	}else if(s.equals("加粗"))
              	{
                       type=Font.BOLD;
                       setCustomFont(new Font(name,type,size));
                }else if(s.equals("斜体"))
                {
                       type=Font.ITALIC;
                       setCustomFont(new Font(name,type,size));
                }else
                	{
                	type=Font.CENTER_BASELINE;
                    setCustomFont(new Font(name,type,size));
                	}

	          }
      		});
      		cb3.addItemListener(new ItemListener()
      		{
      		public void itemStateChanged(ItemEvent event)
	          {
	            String state=event.getItem().toString();
	            size=Integer.parseInt(state);
	            setCustomFont(new Font(name,type,size));
	          }
      		});

		}
	public Font showFontDialog()
		{
			fontdialog.setVisible(true);
			if(okpressed)
				{
				return getCustomFont();
				}
			else
				{
				return customFont;
				}
		}
	private void init()
		{
			okButton=new JButton("确定");
			cancelButton=new JButton("取消");
			GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();
      		zt=ge.getAvailableFontFamilyNames();
      		cb1=new JComboBox(zt);
      		cb1.setMaximumRowCount(6);
      		area=new JTextArea(6,30);
      		cb3=new JComboBox();
      		for(int i=1;i<=72;i++)
      			{
      			if(i%2==0)
      			{
      				cb3.addItem(i);
      			}
      			}
      		okButton.setFocusable(true);
      		area.setEditable(false);
      		area.setText(new Date().toString());
      		area.setBorder(new TitledBorder("字体样式"));
      		area.setBackground(new Color(255,255,255));
      		okButton.setBackground(new Color(122,122,122));
      		cancelButton.setBackground(new Color(122,122,122));

		}


	public void setWidth(int width) {
			this.width = width;
	}

	public void setHeight(int height){
			this.height = height;
	}

	private int getWidth() {
			return (this.width);
	}

	private int getHeight() {
			return (this.height);
	}


	private void setCustomFont(Font customFont) {
		this.customFont = customFont;
		area.setFont(customFont);
       	area.revalidate();

	}
    @Override
	public String toString()
	{
		return FontDialog.class.toString();
	}
	public Font getCustomFont() {
		return (this.customFont);
	}
	private class fontListener extends WindowAdapter implements ActionListener
	{
        @Override
			public void windowClosing(WindowEvent e)
			{
					fontdialog.dispose();

			}

			public void actionPerformed(ActionEvent e)
			{
				if(e.getSource()==cancelButton)
				{
					fontdialog.dispose();
					cancelpressed=true;
				}
				else if(e.getSource()==okButton)
				{
					okpressed=true;
					setCustomFont(new Font(name,type,size));
					fontdialog.dispose();
				}
			}
	}


}