menufont.java

《JBUILDER精髓》各章的源代码可以直接调入编程开发环境里运行无须更改

package teditor;

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


/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2006</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class MenuFont extends JDialog implements ItemListener,ActionListener,TextListener{
  CheckboxGroup gp;
        Checkbox plain,bold,italic,bolditalic;
        Choice fontNameChoice=new Choice();
        Choice color=new Choice();
        TextField tf;
        Button ok=new Button("ok");
        Button cancel=new Button("cancel");
        boolean changed=true;
        int fontStyleInt=0;
        int fontSizemin=10,fontSizemax=36,ab=2;
        List fst;
    MenuFont(Frame frame,String s, boolean modal){
                super(frame,s,modal);}

  public Font myLayout(Font tafont){
    this.getContentPane().setLayout(new GridBagLayout());
        GridBagConstraints gbc=new GridBagConstraints();//网格包约束条件对象
        gbc.gridwidth=1;
        gbc.gridheight=1;
        gbc.weightx=1;
        gbc.weighty=1;
        gbc.fill=gbc.HORIZONTAL;
        gbc.anchor=gbc.CENTER;//锚点


        //布局
        //字号文本框

        tf=new TextField(tafont.getSize()+"",14);
        tf.selectAll();
        tf.addTextListener(this);
        gbc.gridx=0;
        gbc.gridy=1;
        this.getContentPane().add(tf,gbc);
        //字体复选
        gp=new CheckboxGroup();
    if (tafont.getStyle()==0)
         plain =new Checkbox("Plain",true,gp);
        else
         plain =new Checkbox("Plain",false,gp);
        gbc.gridx=0;
        gbc.gridy=0;
        getContentPane().add(plain,gbc);
        plain.addItemListener(this);

        if (tafont.getStyle()==1)
         bold =new Checkbox("Bold",true,gp);
        else
         bold =new Checkbox("Bold",false,gp);
        gbc.gridx=1;
        gbc.gridy=0;
        getContentPane().add(bold,gbc);
        plain.addItemListener(this);


        if (tafont.getStyle()==2)
         italic =new Checkbox("Italic",true,gp);
        else
         italic =new Checkbox("Italic",false,gp);
        gbc.gridx=2;
        gbc.gridy=0;
        getContentPane().add(italic,gbc);
        plain.addItemListener(this);

        if (tafont.getStyle()==3)
         bolditalic =new Checkbox("Bolditalic",true,gp);
        else
         bolditalic =new Checkbox("Bolditalic",false,gp);
        gbc.gridx=3;
        gbc.gridy=0;
        getContentPane().add(bolditalic,gbc);
        plain.addItemListener(this);


        //字号列表
        fst= new List(4,false);
        fst.addItemListener(this);
        int index=0;
        boolean bk=false;
        for(int i=fontSizemin;i<fontSizemax;i=i+ab)
         {
                 if(!bk){
                         if(i!=tafont.getSize())
                         {
                           index++;
                         }else{bk=true;}
                 }
                 fst.add(i+"");
         }
  fst.select(index);
  gbc.gridx=0;
  gbc.gridy=2;
  getContentPane().add(fst,gbc);

          //字体列表
        gbc.gridx=1;
        gbc.gridy=1;
        fontNameChoice.addItemListener(this);
        fontNameChoice.add("Serif");
        fontNameChoice.add("Courier");
        fontNameChoice.add("Helvetica");
        fontNameChoice.add("TimesRoman");
        fontNameChoice.select(tafont.getName());
        getContentPane().add(fontNameChoice,gbc);


        //添加按扭
        gbc.gridx=2;
        gbc.gridy=2;
        gbc.fill=gbc.NONE;
        ok.addActionListener(this);
        getContentPane().add(ok,gbc);

        gbc.gridx=3;
        gbc.gridy=2;
        cancel.addActionListener(this);
        getContentPane().add(cancel,gbc);



        //窗口监听
   this.addWindowListener(new WindowAdapter()
      {
        public void windowClosing(WindowEvent e)
             {dispose();}
                   });

     this.setLocation(120,120);
     this.setResizable(false);
     this.setSize(470,160);
     this.setVisible(true);
   if(changed)
     return returnFont();
    else
     return tafont;

   }
   //ITEM的监听方法
   public void itemStateChanged(ItemEvent ie) {

           if(ie.getSource()==plain)
           {
                   updateFontTextField();

           }
           else	if(ie.getSource()==bold)
           {
                   updateFontTextField();
           }
           else	if(ie.getSource()==italic)
           {
                   updateFontTextField();
           }
           else  if(ie.getSource()==bolditalic)
           {
                   updateFontTextField();
           }
           else  if(ie.getSource()==fontNameChoice)
           {
                   updateFontTextField();
           }

           else if(ie.getSource()==fst){
                   List lt=(List)ie.getSource();
                   tf.setText(lt.getSelectedItem());
                   updateFontTextField();

           }
           }

           //按扭监听方法
           public void actionPerformed(ActionEvent ee)
           {

                   if(ee.getSource()==ok)
                   {changed=true;
                    dispose();
                   }
                   else if(ee.getSource()==cancel)
                   {
                           changed=false;
                           dispose();
                   }
           }

   //文本监听
   public void textValueChanged(TextEvent e){
           int indexf=0;
           boolean breakf=false;
           int thisNum=0;
           for(int i=fontSizemin;i<fontSizemax;i=i+ab)
         {
                 if(!breakf){
                         try{
                                 thisNum=Integer.parseInt(tf.getText());
                         }catch (NumberFormatException nfe)
                         {
                                 thisNum=0;
                         }
                         if(i!=thisNum){indexf++;}
                else{breakf=true;}
         }
           }
           updateFontTextField();
           }


           //返回当前字体
           public Font returnFont(){
             updateFontTextField();
             return new Font(fontNameChoice.getSelectedItem(),fontStyleInt,
                             Integer.parseInt(fst.getSelectedItem()));

           }
           //对字体进行更新
           private void updateFontTextField(){
             if(gp.getSelectedCheckbox().getLabel().equals("Plain"))
             {
                     fontStyleInt=Font.PLAIN;
             }
             else if(gp.getSelectedCheckbox().getLabel().equals("Bold"))
             {
                     fontStyleInt=Font.BOLD;
             }
              else if(gp.getSelectedCheckbox().getLabel().equals("Italic"))
             {
                     fontStyleInt=Font.ITALIC;
             }
            else if(gp.getSelectedCheckbox().getLabel().equals("Bolditalic"))
             {
                     fontStyleInt=Font.ITALIC+Font.BOLD;
             }


    }


}