[Scilab-users] Recognition of cursor key as input

[Jens]

Hello,
My event_handler experiments with the Scilab help example in "Event 
handler functions" (see below) led to nothing.  I can see the "event" at 
the bottom of the graphic window but I cannot arrest it in a variable. I 
tried this:

function  my_eventhandler(win,x,y,ibut)
   if  ibut==-1000  then  return,end
   [x,y]=xchange  <xchange.html>(x,y,'i2f')
   xinfo  <xinfo.html>(msprintf  <msprintf.html>('Event code %d at mouse position is (%f,%f)',ibut,x,y))
endfunction

plot2d  <plot2d.html>()
fig  =  gcf  <gcf.html>()  ;
fig.event_handler  =  'my_eventhandler'  ;
fig.event_handler_enable  =  "on"  ;
//now:
//   -  move the mouse over the graphic window
//   -  press and release keys shifted or not with Ctrl pressed or not
//   -  press button, wait a little release
//   -  press and release button
//   -  double-click button

fig.event_handler_enable  =  "off"  ;  //suppress the event handler

	<scilab://scilab.execexample/> 	<scilab://scilab.editexample/>


I fear I must retire to

m=evstr(x_dialog(...)

Jens
----------------------------------------------------------------------------

Am 13.08.2014 11:12, schrieb mottelet [via Scilab / Xcos - Mailing Lists 
Archives]:
>
> Hello,
>
> IMHO, the only way to trap a keypress and get the ascii (?) code is to 
> use the event_handler callback of a figure :
>
> function handler(x,y,ibut)
> //
> endfunction
>
> f=gcf();
> f.event_handler='handler';
> f.event_handle_enable='on';
>
> On my computer, I have the following mapping
>
> left arrow pressed : ibut=37 (released=-37)
> up arrow : 38
> right arrow 39
> down arrow 40
>
> The problem is that you need to have a figure opened, and that this 
> figure must have the focus.
>
> S.
>
> Jens <[hidden email] </user/SendEmail.jtp?type=node&node=4031030&i=0>> 
> a écrit :
>
>> Hi Samuel,
>> ASCII representation of up, down etc. would help me if I knew a Scilab
>> command which puts the ascii value into a variable. input() is definitely
>> unable to do so.
>>
>> Jens
>>
>>
>>
>>
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