Can an applet like this be written???

[eeyimaya]

Hello,

I want to write an applet that will work like powerpoint!!! Users will
select images, text and even animations from either his/her computer
(by browse disk button) or from the server(by browse server button)
and then embed them to the slide. Then the slide will be saved and
uploaded to the server... I know applets have some security problems.
Here I think when user want to seek his/her harddisk some security
problems may exist.Is this true? Also embedding the images, text and
animations is another problem and of course saving the slide both
user's harddisk and to the server....

Is all of these possible? What problems may exist? Do you know any
applet on internet like this???

Any help will be appreciated...
Thanks much...
Ertan.

 

[Mladen Adamovic]

But you can save users slide shows to the server local disk. And applet use
socket communication for loading to the users code.

There is one implementation of that for applets which I know, but as a part
of big mathematic java project you can find at adress
http://www.matf.bg.ac.yu/r3nm/NumericalMethods.tar.gz
(source code) or http://www.matf.bg.ac.yu/r3nm/index.html

Look at the classes in common.* directory.

 

[Andrew Thompson]

....

I want to write an applet that will work like powerpoint!!! Users will
select images, text and even animations from either his/her computer
(by browse disk button) or from the server(by browse server button)
and then embed them to the slide. Then the slide will be saved and
uploaded to the server... I know applets have some security problems.

Not if they are signed.

Here I think when user want to seek his/her harddisk some security
problems may exist.Is this true?

A signed applet could do IO on the user's disk
with no problems.

Also embedding the images, text and
animations is another problem and of course saving the slide both
user's harddisk and to the server....

[ Server / Harddisk IO is no great problem with signed applets ]

Images / Animations

Depends what flavours of images and animation
you are talking about.

Java has inbuilt support for image types png and jpeg,
and can read gif's - somebody made a comment recently
that suggested Sun was caught in the 'gif licence thing'
and that core Java does not provide the ability to write gif's..

You might also check..
http://java.sun.com/products/java-media/jai/

For most of the animation you would have to look
into the JMF..
http://java.sun.com/products/java-media/jmf/

HTH

 

[Tim Tyler]

Java has inbuilt support for image types png and jpeg,
and can read gif's - somebody made a comment recently
that suggested Sun was caught in the 'gif licence thing'
and that core Java does not provide the ability to write gif's..

It doesn't let you write PNGs either.