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Applets<br />
that looks more or less like this (it is an imaginary code just to show what I would like to do)<br />
(if.event.target.ComponentType==Button) etc.<br />
I tried a lot of things with getClass but none of them worked<br />
Answer: Have your applet implement the ActionListener interface, and have every button that's<br />
instantiated add the applet as an ActionListener. Then, inside of your applet, have the following<br />
method:<br />
public void actionPerformed(ActionEvent event) {<br />
// check to see if the source of the event was a button<br />
if(event.getSource() instanceof Button) {<br />
// do whatever it is you want to do with buttons...<br />
}<br />
}<br />
Darryl L. Pierce Visit <br />
Q: Could you suggest how to draw one centimeter grid in applet, please? One cm on the screen<br />
must be equal to real cm.<br />
Answer: If you're not all that picky about it, you can always use java.awt.Toolkit's<br />
getScreenResolution() to see how far between the lines should be in the grid....that's assuming the<br />
applet security allows it.<br />
But have it _exactly_ one cm, you can't do, since the user can always adjust the display with the<br />
monitor controls (making the picture wider/taller/whatever), and no computer that I know of can know<br />
those settings.<br />
--<br />
Fredrik Lännergren<br />
Not only that, the OS (and thus <strong>Java</strong>) does not know if I am using a 21" or a 14" monitor and thus<br />
can't know the actual physical size of a given number of pixels. By convention, on Windows monitors<br />
are assumed to be either 96dpi or 120dpi (depending on the selection of large or small fonts). <strong>Java</strong><br />
usually assumes 72dpi. None of these values is likely to be<br />
accurate.<br />
--<br />
Mark Thornton<br />
Q: Does anyone know how to or where I can find information about determining if cookies are<br />
disabled on a client browser making a request to a servlet or JSP (or any server side request handler,<br />
for that matter)? Also, is there a way to determine whether or not a client's browser has style sheets<br />
enabled?<br />
Answer: To test if the client has cookies enabled, create a cookie, send it, and read it back. If you<br />
can't read it back, then the client does not accept them. It's not a clean way of doing it, but it's the only<br />
way (that I know if).<br />
As for CSS, there is no way to know if they allow CSS. Different versions of the browsers support<br />
varying levels of CSS. You can get the browser type from the request object and then make decisions<br />
based on that.<br />
Q: How can two applets communicate with each other? Have you some examples?<br />
file:///F|/350_t/350_tips/applets.htm (6 of 10) [2002-02-27 21:17:49]
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