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 <j.s.st...@hslmg.de> 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[1](x,y,'i2f') xinfo[2](msprintf[3]('Event
code %d at mouse position is (%f,%f)',ibut,x,y))endfunction
plot2d[4]()fig = gcf[5]() ;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][6]> 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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