[Scilab-users] Recognition of cursor key as input
Jens
j.s.strom at hslmg.de
Wed Aug 13 14:12:37 CEST 2014
This is small example's output:
!--error 77
set: falsche Nummer von Eingangsargument(en): 2 nach 3 erwartet.
at line 3 of function waitforkeypress called by :
select waitforkeypress()
at line 369 of exec file called by : [last line og script]
exec('G:\Daten\ScilabFun\functionCheck.sce', -1)
Jens
-----------------------------------------------------------------------------------------------------------
Am 13.08.2014 13:41, schrieb mottelet [via Scilab / Xcos - Mailing Lists
Archives]:
>
> Would this small example fit your needs ?
>
> function handler(win,x,y,ibut)
> global _keypress
> if or(ibut==(37:40))
> _keypress=ibut;
> end
> endfunction
>
> function key=waitforkeypress()
> global _keypress
> set(gcf(),'event_handler','handler','event_handler_enable','on')
> _keypress=0;
> while ~_keypress
> sleep(1)
> end
> set(gcf(),'event_handler_enable','off')
> key=_keypress;
> endfunction
>
> while 1
> select waitforkeypress()
> case 37
> disp('left')
> case 38
> disp('up')
> case 39
> disp('right')
> case 40
> disp('down')
> break
> end
> end
>
> S.
>
> Jens <[hidden email] </user/SendEmail.jtp?type=node&node=4031032&i=0>>
> a écrit :
>
>> 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
>> <a href="scilab://scilab.execexample/"> <a
>> href="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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