Dynamic Buttons with JSP

[Larson]

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

 

[palbano]

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 [sig][/sig]

 

[nehaldave]

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..

 

[Guest_imported]

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