[694] in java-interest
How to integrate applets into forms?
daemon@ATHENA.MIT.EDU (Tientien Li)
Thu Jul 13 14:40:05 1995
Date: Thu, 13 Jul 1995 10:06:21 -0700
From: li@deming.Jpl.Nasa.Gov (Tientien Li)
To: java-interest@java.sun.com
Cc: li@deming.Jpl.Nasa.Gov
Hi again,
Has anyone integrated applets into forms? I understand one has to use
Jonathan's or Arthur's embeded applet package to boundle components
together. However, is there a standard way to boundle componets/apples
with other HTML objects, e.g., forms?
Right now I'm using a rather crude approach to tie applets into forms.
I first boudle app tags with forms in HTML docs and then use app parameters
to pass relative position (i.e, the Child #) and type info of form
elements that the applet will be communicated with. In the applet, it
will get these info at the init time and located the form elements and
cast them appropriately according to their type info.
This approah is not very clean, but it works, at least paratially. I can
get applets to talk to form elements, but I can't get form elements to
talk back. This is because there are no way for me to plug my own callback
methods into form elements. So, now I can pass dynamic info generated from
the applet to form elements and display them, but I can't pass changes
made from from elements back to the applet unless it's polled periodically
by the applet.
Can any one suggest a good triggle to use for passing data change info
from form elements back to the applet without using polling?
In general, I feel there should be a more general inter-applet communication
mechanism that allows applets to:
- find one other using some form of "name" or "address"
- get event notice from other applets... or
- attach/chain own callback methods to other applets' events
For example, if I can attach or chain callback methods from an applet to
the "selected" method of a form element, then I can catch events associated
with the form elements.
--
Tientien Li
li@deming.jpl.nasa.gov
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