desktop.java

象win95开始菜单一样的地址菜单

import java.net.*;
import java.lang.*;
import java.util.*;
import java.awt.*;
import java.applet.*;
public class desktop extends Applet
{
 Frame f;
 Image wallpaper;
//for Icons (size=32x32)
 int iconWH=32;
 int iconCount=0;
 Vector iconText  =new Vector();
 Vector icons     =new Vector();
 Vector iconX     =new Vector();
 Vector iconY     =new Vector();
 Vector iconLink  =new Vector();
//for StartBtn
 String startbtn="Start";
 int startbtnEX=0;
 Image startlogo,buffer=null;
//for PopMenu
 Vector items=new Vector();
 Vector hrefs=new Vector();
 Dimension d=size();
 boolean pop=false;
 int maxLength=0;
 int fwidth=100;
 int itemCount=0;
 int mouseX=0,mouseY=0;
 int menuY=0,menuEY=0;
 int fheight=0;
//code for Icons
  public void addIcon(String txt,Image img,String href,String x,String y)
  { iconText.addElement(txt);
    icons.addElement(img);
    iconLink.addElement(href);
    iconX.addElement(x);
    iconY.addElement(y);
    iconCount++;
  }
//code for PopMenu
  public void addItem(String caption,String href)
  {
    items.addElement(caption);
    hrefs.addElement(href);
    if(caption.length()>maxLength)maxLength=caption.length();
    itemCount++;
  }
  public boolean mouseUp(Event e,int x,int y)
  { int tempY=0,i=0,ix=0,iy=0,iex=0;
    mouseX=x;
    mouseY=y;
    if(pop&&(0<=mouseX)&&(menuY<mouseY)&&(fwidth>=mouseX)&&(menuEY>mouseY))
       {
       for(tempY=menuY;tempY<menuEY;tempY+=fheight,i++)
        if((tempY+8<mouseY)&&(tempY+fheight+8>mouseY))
           {
           repaint(0,tempY+8,fwidth,tempY+fheight+8);
           showStatus("Select "+i+" is "+items.elementAt(i)+" Link To "+hrefs.elementAt(i));
           break;
           }
       do_menu(i);
       }
    else
       if((0<=mouseX)&&(d.height-fheight<mouseY)&&(startbtnEX>=mouseX)&&(d.height>mouseY))
       {pop=!pop;repaint();}
    else
       {
        repaint();
        pop=false;
       }
  if(iconCount>0)
   for(i=iconCount-1;i>=0;i--)
   {
    if(icons.elementAt(i)!=null)
    {
    ix= Integer.parseInt((String)  iconX.elementAt(i))-iconWH/2;
    iex=iconWH;
    iy= Integer.parseInt((String)  iconY.elementAt(i))+iconWH;
    if((ix<=mouseX)&&(iy-iconWH<=mouseY)
        &&(ix+iex>=mouseX)&&(iy+fheight-8>=mouseY))
        {do_icon(i);break;}
    }else break;
    }
    return true;
  }
  public boolean mouseMove(Event e,int x,int y)
  {
    int tempY=0;
    mouseX=x;
    mouseY=y;
    repaint();
    return true;
  }
  public void update(Graphics g){paint(g);}
  public boolean imageUpdate(Image img,int flags,int x,int y, int w,int h)
  {
  if((flags&SOMEBITS)!=0){repaint(x,y,w,h);
  } else if((flags&ABORT)!=0)
  {repaint();}
  return(flags&(ALLBITS|ABORT))==0;
  }
  public void paint(Graphics g)
  {
  Graphics screengc=null;
  screengc=g;
  g=buffer.getGraphics();
  int i=0;
  String str;
  int y=0;
  int ix=0,iy=0,iex=0;
  d=size();
  fheight= g.getFontMetrics().getHeight() + 8;
  if(wallpaper!=null) g.drawImage(wallpaper,0,0,d.width,d.height-8,this);
  g.setColor(Color.lightGray);
  g.fillRect(0,d.height-fheight,d.width,fheight+8);
  startbtnEX=g.getFontMetrics().stringWidth(startbtn)+20;
  g.fill3DRect(0,d.height-fheight,startbtnEX,fheight+8,!pop);
  if(startlogo!=null) g.drawImage(startlogo,0,d.height-fheight+2,16,fheight+8,this);
  if(!pop)g.setColor(Color.black);else g.setColor(Color.white);
  g.drawString(startbtn,17,d.height-3);

  if(iconCount>0)
   for(i=iconCount-1;i>=0;i--)
   {
    if(icons.elementAt(i)!=null)
    {
    g.setColor(Color.lightGray);
    iex= g.getFontMetrics().stringWidth((String) iconText.elementAt(i));
    ix= Integer.parseInt((String)  iconX.elementAt(i))-
    iex/2;
    iy= Integer.parseInt((String)  iconY.elementAt(i))+iconWH;
    if((ix<=mouseX)&&(iy-iconWH<=mouseY)
        &&(ix+iex>=mouseX)&&(iy+fheight-8>=mouseY))
     g.draw3DRect(ix-4,iy-iconWH-4,iex+8,iy+fheight,true);

    g.setColor(Color.black);
    g.fillRect(
     ix,
     iy+2,
     g.getFontMetrics().stringWidth((String) iconText.elementAt(i)),
     fheight-8
    );
    g.setColor(Color.white);
    g.drawString(
    (String) iconText.elementAt(i),
     ix,
     iy+fheight-8
    );
    g.drawImage(
     (Image)icons.elementAt(i),
     ix+iconWH/2,
     iy-iconWH,
     iconWH,iconWH,this
    );
    }
   }
  if(pop&&(itemCount>0))
   {
   y=d.height-fheight-8;
   menuEY=y;
   for(i=itemCount-1;i>=0;i--)
   {
     str=(String) items.elementAt(i);
     g.setColor(Color.lightGray);
     if((0<=mouseX)&&(y-fheight+8<=mouseY)&&(fwidth>=mouseX)&&(y+8>=mouseY))
     g.fill3DRect(0,y-fheight+8,fwidth,fheight,false);
     else
     g.fill3DRect(0,y-fheight+8,fwidth,fheight,true);
     g.setColor(Color.black);
     g.drawString(str,5,y);
     y-=fheight;
    }
   menuY=y;
   }
   screengc.drawImage(buffer,0,0,null);
  }
//menu handler
 public void do_menu(int i)
 {
  switch(i)
  {
  case 0:
  f=new msgbox("About RDesktop",
  "Created by: Raymond Anthony Samalo\n"+
  "E-mail    : [e-mail]\n"+
  "Made with : jdk 1.0,1998\n"+
  "What is it: a Desktop like interface for\n"+
  "            website navigational purpose\n"+
  "Parameters:\n"+

  "           msg            is the message of the day\n"+
  "           img            is the background image\n"+
  "           cmd            is the menu button text\n"+
  "           logo           is the menu button image\n\n"+
  "           menu1  .. menuN  are the menu items\n"+
  "           link1  .. linkN  are the URLs      \n\n"+
  "           icon1  .. iconN  are the icon image files\n"+
  "           ilink1 .. ilinkN are the URLs      \n"+
  "           ix1    .. ixN    are the x-center of icons\n"+
  "           iy1    .. iyN    are the top-y    of icons\n"+
  "           itext1 .. itextN are the icons' text\n\n"+
  "Note      :\n link can be started with pop: for making messagebox\n"+
  "           I will be trying to allow dragging icon or a cool Mac Desktop\n"+
  "Super Note:\n this is a freeware but if you want to support me...\n"+

  "BTW       :\n THANK YOU FOR TRYING RDesktop \n"


  );
  f.show();
  break;
  default:
  do_link((String)hrefs.elementAt(i));
  }
 }
// icon handler
 public void do_icon(int i)
 {
  showStatus("Select icon"+i+" is "+iconText.elementAt(i));
  do_link((String)iconLink.elementAt(i));
 }
// link executor
 public void do_link(String link)
 {
  if(link.startsWith("pop:"))
  {
  f=new msgbox("RDesktop message",link.substring(4));
  f.show();
  }else
  {
   try{getAppletContext().showDocument(new URL(link));}
   catch(MalformedURLException er)
   {
   f=new msgbox("RDesktop ERROR","PAGE NOT FOUND:\n"+link);
   f.show();
   }
  }
 }
// INIT() 
 public void init()
 {int i=0;
  setBackground(Color.cyan);
  d=size();
  buffer=createImage(d.width,d.height);
  if(getParameter("msg")!=null)
  {f=new msgbox("Message of the day..!",getParameter("msg"));f.show();}
  if(getParameter("img")!=null) wallpaper=getImage(getDocumentBase(),getParameter("img"));
  if(getParameter("logo")!=null) startlogo=getImage(getDocumentBase(),getParameter("logo"));
  if(getParameter("cmd")!=null) startbtn=getParameter("cmd");
     addItem("(C)RDesktop","about");
  for(i=1;getParameter("menu"+i)!=null;i++)
  addItem(
   getParameter("menu"+i),
   (getParameter("link"+i)!=null)?getParameter("link"+i):"none"
  );
  for(i=1;getParameter("icon"+i)!=null;i++)
  addIcon(
   (getParameter("itext"+i)!=null)?getParameter("itext"+i):"",
   getImage(getDocumentBase(),getParameter("icon"+i)),
   (getParameter("ilink"+i)!=null)?getParameter("ilink"+i):"none",
   getParameter("ix"+i),
   getParameter("iy"+i)
  );
 }
}

class msgbox extends Frame
{
 msgbox(String title,String message)
 {
  super(title);
  setLayout(new BorderLayout());
  add("Center",new TextArea(message));
  add("South",new Button("OK"));
 }
 public boolean action(Event e,Object arg)
 {
 hide();
 return true;
 }

}