Исходный текст программы ListboxDemo.java

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// ==========================================
// ListboxDemo.java
//(C) Alexandr Frolov, 1998
// E-mail: frolov@glasnet.ru
// Web:    http://www.glasnet.ru/~frolov 
// ==========================================

import java.applet.Applet;
import java.awt.*;

public class ListboxDemo extends Applet
{
  List lboxFont;
  List lboxColor;
  List lboxFontSize;
  List lboxStyle;
  
  Label lblFont;
  Label lblColor;
  Label lblFontSize;
  Label lblStyle;
  
  Color clrText = Color.black;
  int nFontStyle = Font.PLAIN;
  int nFontSize = 14;
  Font fontTextFont;
  String szFont = "Helvetica";
  boolean bLargeFont = false;
  
  // ===========================================
  // init
  // ===========================================
  public void init()
  {
    setBackground(Color.yellow);
    
    lboxFont = new List(3, false);
    lboxColor = new List(5, false);
    lboxFontSize = new List(3, false);
    lboxStyle = new List(4, true);
    
    lblFont = new Label("Font:");
    lblColor = new Label("Color:");
    lblFontSize = new Label("Font size:");
    lblStyle = new Label("Font style:");
    
    add(lblFont);
    add(lboxFont);
    
    add(lblColor);
    add(lboxColor);

    add(lblFontSize);
    add(lboxFontSize);
    
    add(lblStyle);
    add(lboxStyle);
    
    lboxFont.addItem("Helvetica");
    lboxFont.addItem("Courier");
    lboxFont.addItem("TimesRoman");
    
    lboxFontSize.addItem("14");
    lboxFontSize.addItem("16");
    lboxFontSize.addItem("18");
    lboxFontSize.addItem("20");
    lboxFontSize.addItem("22");
    
    lboxColor.addItem("Red");
    lboxColor.addItem("Blue");
    lboxColor.addItem("White");
    lboxColor.addItem("Black");
    lboxColor.addItem("Yellow");
    
    lboxStyle.addItem("Large");
    lboxStyle.addItem("Bold");
    lboxStyle.addItem("Italic");
  }

  // ===========================================
  // getAppletInfo
  // ===========================================
  public String getAppletInfo()
  {
    return "Name: ListboxDemo";
  }
  
  // ============================================
  // paint
  // ============================================
  public void paint(Graphics g)
  {
    g.setColor(clrText);
    g.setFont(fontTextFont);
    g.drawString("Test string", 10, 200);
  }
  
  // ============================================
  // handleEvent
  // ============================================
  public boolean handleEvent(Event evt)
  {
    List lboxChanged;
    
    if(evt.target instanceof List)
    {
      lboxChanged = (List)evt.target;
      
      if(evt.id == Event.LIST_SELECT ||
	   evt.id == Event.LIST_DESELECT)
      {	   
        if(lboxChanged.equals(lboxFont))
        {
	  szFont = lboxChanged.getSelectedItem();
        }
      
        else if(lboxChanged.equals(lboxColor))
        {
	  int nColor = 
            lboxColor.getSelectedIndex();
  	  switch(nColor)
	  {
	    case 0:
	    {
	      clrText = Color.red;
	      break;
	    }
	    case 1:
	    {
	      clrText = Color.blue;
	      break;
	    }
	    case 2:
	    {
	      clrText = Color.white;
	      break;
	    }
	    case 3:
	    {
	      clrText = Color.black;
	      break;
	    }
	    case 4:
	    {
	      clrText = Color.yellow;
	      break;
	    }
	  }
	}
      
	else if(lboxChanged.equals(lboxStyle))
	{
	  nFontStyle = Font.PLAIN;
	
          bLargeFont = lboxStyle.isSelected(0);
	
	  if(lboxStyle.isSelected(1))
	    nFontStyle |= Font.BOLD;
	  
	  if(lboxStyle.isSelected(2))
	    nFontStyle |= Font.ITALIC;
        }
      
        else if(lboxChanged.equals(lboxFontSize))
        {
  	  nFontSize = 
	    14 + 
            2 * lboxFontSize.getSelectedIndex();
	}
      
	else
	  return false;
      }
      
      else
	return false;
	
      if(!bLargeFont)
        fontTextFont = new Font(szFont,
	  nFontStyle, nFontSize);
      else
        fontTextFont = new Font(szFont,
	  nFontStyle, 2 * nFontSize);
	
      repaint();
      return true;
    }
    return false;
  }  
}

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