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Dynamic Buttons with JSP

Dynamic Buttons with JSP

Dynamic Buttons with JSP

(OP)
Does somebody know a JSP Script or Bean which kann create button on the fly?

I look for something which produces a Gif image after calling it with
/button.jsp?text=Home

RE: Dynamic Buttons with JSP

Dear larson,

That is a job for a servlet. The servlet sets the HTTP content-type to image/gif then uses the Java Image class to draw the image then send the bits back to the browser in the HTTP content.

"But, that's just my opinion... I could be wrong".
-pete

RE: Dynamic Buttons with JSP

If you want to create GIFs, use ACME labs excellent free gifencoder(http://www.acme.com/), and then do something like this:

     Frame frame = null;
     Graphics g = null;
     FileOutputStream fileOut = null;

     try
     {
         //create an unshown frame
         frame = new Frame();
         frame.addNotify();

         //get a graphics region, using the frame

         Image image = frame.createImage(WIDTH, HEIGHT);
         g = image.getGraphics();

         //manipulate the image
         g.drawString("Hello world", 0, 0);

         //get an ouputstream to a file
         fileOut = new FileOutputStream("test.gif");
         GifEncoder encoder = new GifEncoder(image, fileOut);
         encoder.encode();
      }
      catch (Exception e)
      {
         ;  
      }
      finally
      {
          //clean up
          if (g != null) g.dispose();
          if (frame != null) frame.removeNotify();
          if (fileOut != null) {
          try { fileOut.close(); }
          catch (IOException ioe) { ; }
      }
    }

I have used this code both in jsp & servlets & it works fine.. :)

RE: Dynamic Buttons with JSP

Hi Larsen,
You can use a jsp to read a properties file which will contain your button information, in name value pair.
A helper class in java  could read this and return a vector to the jsp.
The jsp then is free to interpret it on its own. Basically using table tags and populating the columns with a gif file or color or text, an good effect of buttons can be created.
This is quite possible, as i have personally used this in one of my projects.
For more information contact me at
aroravin@geodc.patni.com

Regards
Vinay Arora

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