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<html>
<head>
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<title>PhatKnob</title>
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 | 
<a href="#id347248" class="shortcut">Description</a></nobr></td></tr>
</table>
<div class="refentry" lang="en">
<a name="phat-PhatKnob"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2>
<a name="id319177"></a><span class="refentrytitle">PhatKnob</span>
</h2>
<p>PhatKnob — </p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">
<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a>;
<a
href="../gtk/GtkWidget.html"
>GtkWidget</a>* <a href="phat-PhatKnob.html#phat-knob-new">phat_knob_new</a> (<a
href="../gtk/GtkAdjustment.html"
>GtkAdjustment</a> *adjustment);
<a
href="../gtk/GtkWidget.html"
>GtkWidget</a>* <a href="phat-PhatKnob.html#phat-knob-new-with-range">phat_knob_new_with_range</a> (double value,
double lower,
double upper,
double step);
<a
href="../gtk/GtkAdjustment.html"
>GtkAdjustment</a>* <a href="phat-PhatKnob.html#phat-knob-get-adjustment">phat_knob_get_adjustment</a> (<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a> *knob);
double <a href="phat-PhatKnob.html#phat-knob-get-value">phat_knob_get_value</a> (<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a> *knob);
void <a href="phat-PhatKnob.html#phat-knob-set-value">phat_knob_set_value</a> (<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a> *knob,
double value);
void <a href="phat-PhatKnob.html#phat-knob-set-range">phat_knob_set_range</a> (<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a> *knob,
double lower,
double upper);
void <a href="phat-PhatKnob.html#phat-knob-set-update-policy">phat_knob_set_update_policy</a> (<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a> *knob,
<a
href="../gtk/gtk-Standard-Enumerations.html#GtkUpdateType"
>GtkUpdateType</a> policy);
void <a href="phat-PhatKnob.html#phat-knob-set-adjustment">phat_knob_set_adjustment</a> (<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a> *knob,
<a
href="../gtk/GtkAdjustment.html"
>GtkAdjustment</a> *adjustment);
void <a href="phat-PhatKnob.html#phat-knob-set-log">phat_knob_set_log</a> (<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a> *knob,
<a
href="../glib/glib-Basic-Types.html#gboolean"
>gboolean</a> is_log);
<a
href="../glib/glib-Basic-Types.html#gboolean"
>gboolean</a> <a href="phat-PhatKnob.html#phat-knob-is-log">phat_knob_is_log</a> (<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a> *knob);
</pre>
</div>
<div class="refsect1" lang="en">
<a name="id347248"></a><h2>Description</h2>
<p>
</p>
</div>
<div class="refsect1" lang="en">
<a name="id347264"></a><h2>Details</h2>
<div class="refsect2" lang="en">
<a name="id347275"></a><h3>
<a name="PhatKnob"></a>PhatKnob</h3>
<a class="indexterm" name="id347287"></a><pre class="programlisting">typedef struct {
GtkWidget widget;
/* The adjustment object that stores the data for this knob */
GtkAdjustment *adjustment;
GtkAdjustment* adjustment_prv;
/* update policy (GTK_UPDATE_[CONTINUOUS/DELAYED/DISCONTINUOUS]) */
guint policy : 2;
gboolean is_log;
/* State of widget (to do with user interaction) */
guint8 state;
gint saved_x, saved_y;
/* ID of update timer, or 0 if none */
guint32 timer;
/* Pixmap for knob */
GdkPixbuf *pixbuf;
GdkBitmap *mask;
GdkGC *mask_gc;
GdkGC *red_gc;
/* Old values from adjustment stored so we know when something changes */
gfloat old_value;
gfloat old_lower;
gfloat old_upper;
} PhatKnob;
</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id340768"></a><h3>
<a name="phat-knob-new"></a>phat_knob_new ()</h3>
<a class="indexterm" name="id332185"></a><pre class="programlisting"><a
href="../gtk/GtkWidget.html"
>GtkWidget</a>* phat_knob_new (<a
href="../gtk/GtkAdjustment.html"
>GtkAdjustment</a> *adjustment);</pre>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>adjustment</code></em> :</span></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id322322"></a><h3>
<a name="phat-knob-new-with-range"></a>phat_knob_new_with_range ()</h3>
<a class="indexterm" name="id322334"></a><pre class="programlisting"><a
href="../gtk/GtkWidget.html"
>GtkWidget</a>* phat_knob_new_with_range (double value,
double lower,
double upper,
double step);</pre>
<p>
Creates a new <a href="phat-PhatKnob.html#PhatKnob"><span class="type">PhatKnob</span></a>. The knob will create a new
<a
href="../gtk/GtkAdjustment.html"
><span class="type">GtkAdjustment</span></a> from <em class="parameter"><code>value</code></em>, <em class="parameter"><code>lower</code></em>, <em class="parameter"><code>upper</code></em>, and <em class="parameter"><code>step</code></em>. If these
parameters represent a bogus configuration, the program will
terminate.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>value</code></em> :</span></td>
<td> the initial value the new knob should have
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>lower</code></em> :</span></td>
<td> the lowest value the new knob will allow
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>upper</code></em> :</span></td>
<td> the highest value the new knob will allow
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>step</code></em> :</span></td>
<td> increment added or subtracted when turning
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> a newly created <a href="phat-PhatKnob.html#PhatKnob"><span class="type">PhatKnob</span></a>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id322498"></a><h3>
<a name="phat-knob-get-adjustment"></a>phat_knob_get_adjustment ()</h3>
<a class="indexterm" name="id322510"></a><pre class="programlisting"><a
href="../gtk/GtkAdjustment.html"
>GtkAdjustment</a>* phat_knob_get_adjustment (<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a> *knob);</pre>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>knob</code></em> :</span></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id358357"></a><h3>
<a name="phat-knob-get-value"></a>phat_knob_get_value ()</h3>
<a class="indexterm" name="id358367"></a><pre class="programlisting">double phat_knob_get_value (<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a> *knob);</pre>
<p>
Retrieves the current value of the knob.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>knob</code></em> :</span></td>
<td> a <a href="phat-PhatKnob.html#PhatKnob"><span class="type">PhatKnob</span></a>
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> current value of the knob
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id358426"></a><h3>
<a name="phat-knob-set-value"></a>phat_knob_set_value ()</h3>
<a class="indexterm" name="id358436"></a><pre class="programlisting">void phat_knob_set_value (<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a> *knob,
double value);</pre>
<p>
Sets the current value of the knob. If the value is outside the
range of values allowed by <em class="parameter"><code>knob</code></em>, it will be clamped. The knob
emits the "value-changed" signal if the value changes.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>knob</code></em> :</span></td>
<td> a <a href="phat-PhatKnob.html#PhatKnob"><span class="type">PhatKnob</span></a>
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>value</code></em> :</span></td>
<td> a new value for the knob
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id358510"></a><h3>
<a name="phat-knob-set-range"></a>phat_knob_set_range ()</h3>
<a class="indexterm" name="id358520"></a><pre class="programlisting">void phat_knob_set_range (<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a> *knob,
double lower,
double upper);</pre>
<p>
Sets the range of allowable values for the knob, and clamps the
knob's current value to be between <em class="parameter"><code>lower</code></em> and <em class="parameter"><code>upper</code></em>.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>knob</code></em> :</span></td>
<td> a <a href="phat-PhatKnob.html#PhatKnob"><span class="type">PhatKnob</span></a>
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>lower</code></em> :</span></td>
<td> lowest allowable value
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>upper</code></em> :</span></td>
<td> highest allowable value
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id358616"></a><h3>
<a name="phat-knob-set-update-policy"></a>phat_knob_set_update_policy ()</h3>
<a class="indexterm" name="id358627"></a><pre class="programlisting">void phat_knob_set_update_policy (<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a> *knob,
<a
href="../gtk/gtk-Standard-Enumerations.html#GtkUpdateType"
>GtkUpdateType</a> policy);</pre>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>knob</code></em> :</span></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>policy</code></em> :</span></td>
<td>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id358684"></a><h3>
<a name="phat-knob-set-adjustment"></a>phat_knob_set_adjustment ()</h3>
<a class="indexterm" name="id358695"></a><pre class="programlisting">void phat_knob_set_adjustment (<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a> *knob,
<a
href="../gtk/GtkAdjustment.html"
>GtkAdjustment</a> *adjustment);</pre>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>knob</code></em> :</span></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>adjustment</code></em> :</span></td>
<td>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id358752"></a><h3>
<a name="phat-knob-set-log"></a>phat_knob_set_log ()</h3>
<a class="indexterm" name="id358763"></a><pre class="programlisting">void phat_knob_set_log (<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a> *knob,
<a
href="../glib/glib-Basic-Types.html#gboolean"
>gboolean</a> is_log);</pre>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>knob</code></em> :</span></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>is_log</code></em> :</span></td>
<td>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id358820"></a><h3>
<a name="phat-knob-is-log"></a>phat_knob_is_log ()</h3>
<a class="indexterm" name="id358831"></a><pre class="programlisting"><a
href="../glib/glib-Basic-Types.html#gboolean"
>gboolean</a> phat_knob_is_log (<a href="phat-PhatKnob.html#PhatKnob">PhatKnob</a> *knob);</pre>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td>
<span class="term"><em class="parameter"><code>knob</code></em> :</span></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td>
</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
</body>
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