This is still pretty rough, but it illustrates the use of local storage
for an approach to student class notes:
http://chemagic.com/JSmolVMK2.htm
Local storage is being used on two control button screens on this page -
Draw and Notes-Misc.
On the Draw button screen, 10 JSME structures can be saved/retrieved
to/from local storage.
On the Notes-Misc button screen, 10 Jmol models can be saved/retrieved
to/from local storage. There is also a text area for student notes.
Student notes in this area are auto saved to local storage as they are
typed. This screen also has back-up and erase links for local storage.
The back-up link produces cut/paste JSON text that can be used to
transfer the data to another browser/computer or simply saved as a text
file for data back-up (instructions on Jmol echo window). The erase link
erases local storage for this domain. I can envision notes being
archived in files according to topic and being loaded as needed.
Like I mentioned before, this storage is analogous to cookies, but the
storage limit is about 5Mb. Ten cholesterol models, ten cholesterol
structures, and pages of blah blah blah notes took up a trivial amount
of total space allowed.
The data is persistent until erased or replaced. The auto saved notes
reload when the page is opened in the browser of the original save or
when a back-up JSON is loaded into a new browser.
There is some error checking, but I still have a lot of work to do on
this. The code for working with local storage is amazingly simple to
use. I'm interested in any feedback on how various browsers and
platforms respond to all of this.
Otis
--
Otis Rothenberger
[email protected]
http://chemagic.com
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