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<div class="refentry" title="FLvalue">
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<h2>
<span class="refentrytitle">FLvalue</span>
</h2>
<p>FLvalue —
Shows the current value of a FLTK valuator.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp23250536"></a>
<h2>Description</h2>
<p>
<span class="emphasis"><em>FLvalue</em></span> shows current the value of a valuator in a text field.
</p>
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<div class="refsect1" title="Syntax">
<a id="idp23251480"></a>
<h2>Syntax</h2>
<pre class="synopsis">ihandle <span class="command"><strong>FLvalue</strong></span> "label", iwidth, iheight, ix, iy</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp23261856"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ihandle</em></span> -- handle value (an integer number) that unequivocally references the corresponding valuator. It can be used for the <span class="emphasis"><em>idisp</em></span> argument of a valuator.
</p>
<p>
<span class="emphasis"><em><span class="quote">“<span class="quote">label</span>”</span></em></span> -- a double-quoted string containing some user-provided text, placed near the corresponding widget.
</p>
<p>
<span class="emphasis"><em>iwidth</em></span> -- width of widget.
</p>
<p>
<span class="emphasis"><em>iheight</em></span> -- height of widget.
</p>
<p>
<span class="emphasis"><em>ix</em></span> -- horizontal position of upper left corner of the valuator, relative to the upper left corner of corresponding window (expressed in pixels).
</p>
<p>
<span class="emphasis"><em>iy</em></span> -- vertical position of upper left corner of the valuator, relative to the upper
left corner of corresponding window (expressed in pixels).
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp23325400"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>FLvalue</em></span> shows the current values of a valuator in a text field. It outputs <span class="emphasis"><em>ihandle</em></span> that can then be used for the <span class="emphasis"><em>idisp</em></span> argument of a valuator (see the <a class="link" href="ControlFltkValuators.html" title="FLTK Valuators"><em class="citetitle">FLTK Valuators section</em></a>). In this way, the values of that valuator will be dynamically be shown in a text field.
</p>
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<th align="left">Note</th>
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<td align="left" valign="top">
<p>Note that <span class="emphasis"><em>FLvalue</em></span> is not a valuator and its value cannot be modified.The value for an <span class="emphasis"><em>FLvalue</em></span> widget should be set only by other widgets, and NOT from <a class="link" href="FLsetVal.html" title="FLsetVal"><em class="citetitle">FLsetVal</em></a> or <a class="link" href="FLsetVal_i.html" title="FLsetVal_i"><em class="citetitle">FLsetVal_i</em></a> since this can cause Csound to crash.</p>
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<div class="refsect1" title="Examples">
<a id="idp23329456"></a>
<h2>Examples</h2>
<p>
Here is an example of the FLvalue opcode. It uses the file <a class="ulink" href="examples/FLvalue.csd" target="_top"><em class="citetitle">FLvalue.csd</em></a>.
</p>
<div class="example">
<a id="idp23330440"></a>
<p class="title">
<strong>Example 269. Example of the FLvalue opcode.</strong>
</p>
<div class="example-contents">
<p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
<span class="comment">; Select audio/midi flags here according to platform</span>
<span class="comment">; Audio out Audio in No messages</span>
-odac -iadc -d <span class="comment">;;;RT audio I/O</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o FLvalue.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="comment">; Using the opcode flvalue to display the output of a slider </span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">kr</span> <span class="op">=</span> 441
<span class="ohdr">ksmps</span> <span class="op">=</span> 100
<span class="ohdr">nchnls</span> <span class="op">=</span> 1
<span class="opc">FLpanel</span> "Value Display Box", 900, 200, 50, 50
<span class="comment">; Width of the value display box in pixels</span>
iwidth <span class="op">=</span> 50
<span class="comment">; Height of the value display box in pixels</span>
iheight <span class="op">=</span> 20
<span class="comment">; Distance of the left edge of the value display</span>
<span class="comment">; box from the left edge of the panel</span>
ix <span class="op">=</span> 65
<span class="comment">; Distance of the top edge of the value display</span>
<span class="comment">; box from the top edge of the panel</span>
iy <span class="op">=</span> 55
idisp <span class="opc">FLvalue</span> "Hertz", iwidth, iheight, ix, iy
gkfreq, ihandle <span class="opc">FLslider</span> "Frequency", 200, 5000, <span class="op">-</span>1, 5, idisp, 750, 30, 125, 50
<span class="opc">FLsetVal_i</span> 500, ihandle
<span class="comment">; End of panel contents</span>
<span class="opc">FLpanelEnd</span>
<span class="comment">; Run the widget thread!</span>
<span class="opc">FLrun</span>
<span class="oblock">instr</span> 1
iamp <span class="op">=</span> 15000
ifn <span class="op">=</span> 1
asig <span class="opc">oscili</span> iamp, gkfreq, ifn
<span class="opc">out</span> asig
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; Function table that defines a single cycle</span>
<span class="comment">; of a sine wave.</span>
<span class="stamnt">f</span> 1 0 1024 10 1
<span class="comment">; Instrument 1 will play a note for 1 hour.</span>
<span class="stamnt">i</span> 1 0 3600
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
</p>
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<div class="refsect1" title="See Also">
<a id="idp23332736"></a>
<h2>See Also</h2>
<p>
<a class="link" href="FLbox.html" title="FLbox"><em class="citetitle">FLbox</em></a>,
<a class="link" href="FLbutBank.html" title="FLbutBank"><em class="citetitle">FLbutBank</em></a>,
<a class="link" href="FLbutton.html" title="FLbutton"><em class="citetitle">FLbutton</em></a>,
<a class="link" href="FLprintk.html" title="FLprintk"><em class="citetitle">FLprintk</em></a>,
<a class="link" href="FLprintk2.html" title="FLprintk2"><em class="citetitle">FLprintk2</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp23335736"></a>
<h2>Credits</h2>
<p>Author: Gabriel Maldonado</p>
<p>New in version 4.22</p>
<p>Example written by Iain McCurdy, edited by Kevin Conder.</p>
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