I have been working on a javascript function in order to cancel the last
actions performed by the user (an undo function). I think it might
interest some of the Jmol users :
- the new history command gives the succession of all the commands that
have been sent to the applet.
- the consecutive sets of commands sent are separated by a | character.
- if 2 commands are separated by a semi-colon and are sent to the applet
(eg: "select all; cpk on;") they appear in the history as a single
command (eg: "previous command; | select all; cpk on; | next command...").
To make an undo function I choose to split the history based on the |
character, and to concat the different pieces except the last one. The
new script preceded by a command which reset the interface is then sent
to the applet and it works great.
The problem begins when you want to perform a second undo command : as
all the previous commands are sent as one set, they are no longer
separated by a | in the history and they appear as a single command.
I found a workaround (there might be some others) by inserting a #|;
between the commands from the history in order to keep a separation
between these consecutives commands.
In my opinion, the easyest way would be that the | character is
understood by Jmol as a separator for the history, then one would only
have to send a substring of the history in order to perform an undo, and
it could be used recursively. I don't know if it could be easily
implemented but I think it should help a lot.
By the way, if some are interested by the javascript I used, here it is :
function undo() {
answer = jmolScriptWaitAsArray('show history; history on;');
script = answer[0][0][3];
pieces = script.split(' #|;');
fin = pieces[pieces.length-1].split('|');
debut = pieces.slice(0,-1);
script = debut.concat(fin);
while (script[script.length-1]==' ') {
script.length--;
}
spt='';
for (i=0;i<script.length-1;i++) {
if(script[i]!='')
spt += script[i]+' #|;' ;
}
if (script[0].indexOf(initscript)==-1) {
spt = initscript + ' #|;' + spt;
}
//alert(spt);
executer(spt);
}
Paul
-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________
Jmol-users mailing list
Jmol-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/jmol-users
