Re: [Jmol-users] JmolButton click counter?

[Rolf H. <rh...@fl...>]

On 12/01/2010 05:56 AM, Yingjie Lin wrote:
> Dear Jmol Users,
> 
> I would like to be able to count the number of times a jmolbutton has been clicked by a user, and then
> to make this button do three different things upon the 1st, 2nd and 3rd clicks.
> 
> To be more specific, I would like to have one  "zoom" buttom which zooms in to 3 different levels.
> I know that
>  
> 	jmolButton("zoomto 1 selected;", buttomText, buttomID, buttomTitle)
> 
> does this, however, I don't want zoom in any more after the first three clicks.
> 
> Any thoughts? Thank you!
> 
Instead of using Javascript to control the button function (like Mike
proposed) you could also do it with Jmol scripting instead and still use
"jmolButton".

I guess you will have two buttons, one for zooming in and one for
zooming out. So you could define a function like this (just a rough
proposal, not tested):

function buttonZoom(zoomMode) {
  if (zoomMode = "in") {
    if (zoomLevel < 4) {
      zoomLevel++
    }
    switch(zoomLevel) {
      case 1:
        zoom...
        break
      case 2:
        zoom...
        break
      case 3:
        zoom...
        break
    }
  } else {
    if (zoomLevel > 0) {
      zoomLevel--
    }
    switch(zoomLevel) {
      case 1:
        zoom...
        break
      case 2:
        zoom...
        break
      case 3:
        zoom...
        break
    }
  }
}

"zoomLevel" must be defined as a global Jmol script variable and
initialized with "0".
You could do this together with the function definition within a script
file that is loaded with "script scriptfile" during Jmol initialization.

Your button definitions would then look like this:
  jmolButton('buttonZoom("in")', buttonText, buttonID, buttonTitle)
  jmolButton('buttonZoom("out")', buttonText, buttonID, buttonTitle)

Regards,
Rolf