dynamic menus

[Jan Schenkel]

--- derek bronston <derekbronston at earthlink.net>
wrote:
> Hello, anyone have a tutorial or something
> describing creating dynamic 
> menus?
> 
> Basically what I am doing is creating a playlist for
> an MP3 player. I 
> am opening an external text file that contains the
> song info . I am 
> turning this info into an array in revolution and
> want to loop through 
> and print it to the stack each as a clickable text ,
> or a button.??
> 
> any ideas
> 
> thanks
> 
> derek
> 

Hi Derek,

Why don't you have a look at the list-field control ?

Judging by your description above, you want to build a
list of mp3-files, and play them one by one, or play
one upon a double-click.

First create a player control, through which you'll
play the MP3 files -- call it "MP3Player".
Then make a field "MP3List", and set its
list-behaviour to true via the Inspector palette.
You'll also want a button "AddMP3" to add files

Set the script of the "AddMP3" button to :
--
on mouseUp
  answer file "Please select an MP3 file"
  if it is empty then exit mouseUp
  if field "MP3List" is empty 
  then put it into field "MP3List"
  else put return & it after field "MP3List"
end mouseUp
--

Give the list field the following script :
--
on mouseDoubleUp
  put line (the hilitedLine of me) into tFile
  stop player "MP3Player"
  set the fileName of player "MP3Player" to tFile
  start player "MP3Player"
end mouseDoubleUp
--

Saving the list to a file is easy as well ; add a
button "SaveList" and set its script to :
--
on mouseUp
  ask file "Save MP3 playlist as :"
  if it is empty then exit mouseUp
  put field "MP3List" into URL ("file:" & it)
end mouseUp
--

Reading the list from a file is just as easy ; add a
button "LoadList" and set its script to :
--
on mouseUp
  answer file "Load MP3 playlist from :"
  if it is empty then exit mouseUp
  put URL ("file:" & it) into field "MP3List"
end mouseUp
--

The rest I leave up to you as an exercise ; of course,
if you have mor questions, dobn't hesitate to post
them on th list -- that's what we're here for :-)

Hope this helped,

Jan Schenkel.

=====
"As we grow older, we grow both wiser and more foolish at the same time."  (La Rochefoucauld)

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