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<div class="moz-cite-prefix">Hello,<br>
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:<br>
<br>
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<pre class="scilabcode"><span class="scilabfkeyword">function</span> <span class="scilabfunctionid">my_eventhandler</span><span class="scilabopenclose">(</span><span class="scilabinputoutputargs">win</span><span class="scilabdefault">, </span><span class="scilabinputoutputargs">x</span><span class="scilabdefault">, </span><span class="scilabinputoutputargs">y</span><span class="scilabdefault">, </span><span class="scilabinputoutputargs">ibut</span><span class="scilabopenclose">)</span>
<span class="scilabskeyword">if</span> <span class="scilabinputoutputargs">ibut</span><span class="scilaboperator">==-</span><span class="scilabnumber">1000</span> <span class="scilabskeyword">then</span> <span class="scilabckeyword">return</span><span class="scilabdefault">,</span><span class="scilabskeyword">end</span>
<span class="scilabopenclose">[</span><span class="scilabinputoutputargs">x</span><span class="scilabdefault">,</span><span class="scilabinputoutputargs">y</span><span class="scilabopenclose">]</span><span class="scilaboperator">=</span><a href="xchange.html" class="scilabcommand" target="_top" rel="nofollow" link="external">xchange</a><span class="scilabopenclose">(</span><span class="scilabinputoutputargs">x</span><span class="scilabdefault">,</span><span class="scilabinputoutputargs">y</span><span class="scilabdefault">,</span><span class="scilabstring">'i2f'</span><span class="scilabopenclose">)</span>
<a href="xinfo.html" class="scilabmacro" target="_top" rel="nofollow" link="external">xinfo</a><span class="scilabopenclose">(</span><a href="msprintf.html" class="scilabcommand" target="_top" rel="nofollow" link="external">msprintf</a><span class="scilabopenclose">(</span><span class="scilabstring">'Event code %d at mouse position is (%f,%f)'</span><span class="scilabdefault">,</span><span class="scilabinputoutputargs">ibut</span><span class="scilabdefault">,</span><span class="scilabinputoutputargs">x</span><span class="scilabdefault">,</span><span class="scilabinputoutputargs">y</span><span class="scilabopenclose">))</span>
<span class="scilabfkeyword">endfunction</span>
<a href="plot2d.html" class="scilabcommand" target="_top" rel="nofollow" link="external">plot2d</a><span class="scilabopenclose">()</span>
<span class="scilabid">fig</span> <span class="scilaboperator">=</span> <a href="gcf.html" class="scilabmacro" target="_top" rel="nofollow" link="external">gcf</a><span class="scilabopenclose">()</span> <span class="scilabdefault">;</span>
<span class="scilabid">fig</span><span class="scilaboperator">.</span><span class="scilabfield">event_handler</span> <span class="scilaboperator">=</span> <span class="scilabstring">'my_eventhandler'</span> <span class="scilabdefault">;</span>
<span class="scilabid">fig</span><span class="scilaboperator">.</span><span class="scilabfield">event_handler_enable</span> <span class="scilaboperator">=</span> <span class="scilabstring">"on"</span> <span class="scilabdefault">;</span>
<span class="scilabcomment">//now:</span>
<span class="scilabcomment">// - move the mouse over the graphic window</span>
<span class="scilabcomment">// - press and release keys shifted or not with Ctrl pressed or not</span>
<span class="scilabcomment">// - press button, wait a little release</span>
<span class="scilabcomment">// - press and release button</span>
<span class="scilabcomment">// - double-click button</span>
<span class="scilabid">fig</span><span class="scilaboperator">.</span><span class="scilabfield">event_handler_enable</span> <span class="scilaboperator">=</span> <span class="scilabstring">"off"</span> <span class="scilabdefault">;</span> <span class="scilabcomment">//suppress the event handler</span></pre>
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<br>
I fear I must retire to <br>
<pre style="font-family:Courier New;font-style:normal;font-size:13.0;"><span style="color:rgb(0,0,0);">m</span><span style="color:rgb(92,92,92);">=</span><span style="color:rgb(174,92,176);text-decoration:underline;">evstr</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(50,185,185);">x_dialog</span><span style="color:rgb(74,85,219);">(...)</span></pre>
Jens<br>
----------------------------------------------------------------------------<br>
<br>
Am 13.08.2014 11:12, schrieb mottelet [via Scilab / Xcos - Mailing
Lists Archives]:<br>
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<blockquote style='border-left:2px solid #CCCCCC;padding:0 1em'
cite="mid:20140813111024.Horde.Hc-sr4Z-24Ie7jJkRN_21g1@webmail2.utc.fr"
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<p>Hello,<br>
<br>
IMHO, the only way to trap a keypress and get the ascii (?) code
is to use the event_handler callback of a figure :<br>
<br>
function handler(x,y,ibut)<br>
//<br>
endfunction<br>
<br>
f=gcf();<br>
f.event_handler='handler';<br>
f.event_handle_enable='on';<br>
<br>
On my computer, I have the following mapping <br>
<br>
left arrow pressed : ibut=37 (released=-37)<br>
up arrow : 38<br>
right arrow 39<br>
down arrow 40<br>
<br>
The problem is that you need to have a figure opened, and that
this figure must have the focus.<br>
<br>
S.</p>
<p>Jens <<a moz-do-not-send="true"
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a écrit :</p>
<blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' style="border-left:2px solid #CCCCCC;padding:0 1em"
type="cite">
<p>Hi Samuel,<br>
ASCII representation of up, down etc. would help me if I knew
a Scilab<br>
command which puts the ascii value into a variable. input() is
definitely<br>
unable to do so.<br>
<br>
Jens<br>
<br>
<br>
<br>
<br>
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