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Ari Pollak
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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>GimpChainButton</title><meta name="generator" content="DocBook XSL Stylesheets V1.66.1"><link rel="start" href="index.html" title="GIMP Widgets Library Reference Manual"><link rel="up" href="libgimpwidgets-widgets.html" title="Part<72>I.<2E>GIMP Widgets"><link rel="prev" href="GimpButton.html" title="GimpButton"><link rel="next" href="GimpColorArea.html" title="GimpColorArea"><meta name="generator" content="GTK-Doc V1.2 (XML mode)"><style type="text/css">
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</style></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><table class="navigation" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"><tr valign="middle"><td><a accesskey="p" href="GimpButton.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td><td><a accesskey="u" href="libgimpwidgets-widgets.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td><td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td><th width="100%" align="center">GIMP Widgets Library Reference Manual</th><td><a accesskey="n" href="GimpColorArea.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td></tr></table><div class="refentry" lang="en"><a name="GimpChainButton"></a><div class="titlepage"></div><div class="refnamediv"><h2><span class="refentrytitle">GimpChainButton</span></h2><p>GimpChainButton &#8212; Widget to visually connect two entry widgets.</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">
struct <a href="GimpChainButton.html#GimpChainButton-struct">GimpChainButton</a>;
enum <a href="GimpChainButton.html#GimpChainPosition">GimpChainPosition</a>;
GtkWidget* <a href="GimpChainButton.html#gimp-chain-button-new">gimp_chain_button_new</a> (<a href="GimpChainButton.html#GimpChainPosition">GimpChainPosition</a> position);
void <a href="GimpChainButton.html#gimp-chain-button-set-active">gimp_chain_button_set_active</a> (<a href="GimpChainButton.html" title="GimpChainButton">GimpChainButton</a> *button,
gboolean active);
gboolean <a href="GimpChainButton.html#gimp-chain-button-get-active">gimp_chain_button_get_active</a> (<a href="GimpChainButton.html" title="GimpChainButton">GimpChainButton</a> *button);
</pre></div><div class="refsect1" lang="en"><a name="id2560881"></a><h2>Object Hierarchy</h2><pre class="synopsis">
GObject
+----GtkObject
+----GtkWidget
+----GtkContainer
+----GtkTable
+----GimpChainButton
</pre></div><div class="refsect1" lang="en"><a name="id2560917"></a><h2>Implemented Interfaces</h2><p>
GimpChainButton implements
AtkImplementorIface.</p></div><div class="refsect1" lang="en"><a name="id2560933"></a><h2>Signal Prototypes</h2><pre class="synopsis">
"<a href="GimpChainButton.html#GimpChainButton-toggled">toggled</a>" void user_function (<a href="GimpChainButton.html" title="GimpChainButton">GimpChainButton</a> *gimpchainbutton,
gpointer user_data);
</pre></div><div class="refsect1" lang="en"><a name="id2560965"></a><h2>Description</h2><p>
This widget provides a button showing either a linked or a broken
chain that can be used to link two entries, spinbuttons, colors
or other GUI elements and show that they may be locked. Use it for
example to connect X and Y ratios to provide the possibility of a
constrained aspect ratio.
</p><p>
The <a href="GimpChainButton.html" title="GimpChainButton"><span class="type">GimpChainButton</span></a> only gives visual feedback, it does not really
connect widgets. You have to take care of locking the values yourself
by checking the state of the <a href="GimpChainButton.html" title="GimpChainButton"><span class="type">GimpChainButton</span></a> whenever a value changes
in one of the connected widgets and adjusting the other value if
necessary.
</p></div><div class="refsect1" lang="en"><a name="id2555894"></a><h2>Details</h2><div class="refsect2" lang="en"><a name="id2555900"></a><h3><a name="GimpChainButton-struct"></a>struct GimpChainButton</h3><a class="indexterm" name="id2555908"></a><pre class="programlisting">struct GimpChainButton;</pre><p>
</p></div><hr><div class="refsect2" lang="en"><a name="id2555918"></a><h3><a name="GimpChainPosition"></a>enum GimpChainPosition</h3><a class="indexterm" name="id2555926"></a><pre class="programlisting">typedef enum
{
GIMP_CHAIN_TOP,
GIMP_CHAIN_LEFT,
GIMP_CHAIN_BOTTOM,
GIMP_CHAIN_RIGHT
} GimpChainPosition;
</pre><p>
</p></div><hr><div class="refsect2" lang="en"><a name="id2555938"></a><h3><a name="gimp-chain-button-new"></a>gimp_chain_button_new ()</h3><a class="indexterm" name="id2555946"></a><pre class="programlisting">GtkWidget* gimp_chain_button_new (<a href="GimpChainButton.html#GimpChainPosition">GimpChainPosition</a> position);</pre><p>
Creates a new <a href="GimpChainButton.html" title="GimpChainButton"><span class="type">GimpChainButton</span></a> widget.
</p><p>
This returns a button showing either a broken or a linked chain and
small clamps attached to both sides that visually group the two widgets
you want to connect. This widget looks best when attached
to a table taking up two columns (or rows respectively) next
to the widgets that it is supposed to connect. It may work
for more than two widgets, but the look is optimized for two.</p><p>
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>position</tt></i><EFBFBD>:</span></td><td> The position you are going to use for the button
with respect to the widgets you want to chain.
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td> Pointer to the new <a href="GimpChainButton.html" title="GimpChainButton"><span class="type">GimpChainButton</span></a>, which is inactive
by default. Use <a href="GimpChainButton.html#gimp-chain-button-set-active"><tt class="function">gimp_chain_button_set_active()</tt></a> to
change its state.
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2528463"></a><h3><a name="gimp-chain-button-set-active"></a>gimp_chain_button_set_active ()</h3><a class="indexterm" name="id2528474"></a><pre class="programlisting">void gimp_chain_button_set_active (<a href="GimpChainButton.html" title="GimpChainButton">GimpChainButton</a> *button,
gboolean active);</pre><p>
Sets the state of the <a href="GimpChainButton.html" title="GimpChainButton"><span class="type">GimpChainButton</span></a> to be either locked (<tt class="literal">TRUE</tt>) or
unlocked (<tt class="literal">FALSE</tt>) and changes the showed pixmap to reflect the new state.</p><p>
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>button</tt></i><EFBFBD>:</span></td><td> Pointer to a <a href="GimpChainButton.html" title="GimpChainButton"><span class="type">GimpChainButton</span></a>.
</td></tr><tr><td><span class="term"><i class="parameter"><tt>active</tt></i><EFBFBD>:</span></td><td> The new state.
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2528548"></a><h3><a name="gimp-chain-button-get-active"></a>gimp_chain_button_get_active ()</h3><a class="indexterm" name="id2528560"></a><pre class="programlisting">gboolean gimp_chain_button_get_active (<a href="GimpChainButton.html" title="GimpChainButton">GimpChainButton</a> *button);</pre><p>
Checks the state of the <a href="GimpChainButton.html" title="GimpChainButton"><span class="type">GimpChainButton</span></a>.</p><p>
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>button</tt></i><EFBFBD>:</span></td><td> Pointer to a <a href="GimpChainButton.html" title="GimpChainButton"><span class="type">GimpChainButton</span></a>.
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td> <tt class="literal">TRUE</tt> if the <a href="GimpChainButton.html" title="GimpChainButton"><span class="type">GimpChainButton</span></a> is active (locked).
</td></tr></tbody></table></div></div></div><div class="refsect1" lang="en"><a name="id2564934"></a><h2>Signals</h2><div class="refsect2" lang="en"><a name="id2564940"></a><h3><a name="GimpChainButton-toggled"></a>The "toggled" signal</h3><pre class="programlisting">void user_function (<a href="GimpChainButton.html" title="GimpChainButton">GimpChainButton</a> *gimpchainbutton,
gpointer user_data);</pre><p>
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>gimpchainbutton</tt></i><EFBFBD>:</span></td><td>the object which received the signal.
</td></tr><tr><td><span class="term"><i class="parameter"><tt>user_data</tt></i><EFBFBD>:</span></td><td>user data set when the signal handler was connected.</td></tr></tbody></table></div></div></div><div class="refsect1" lang="en"><a name="id2564997"></a><h2>See Also</h2><p>
You may want to use the convenience function <a href="libgimpwidgets-GimpWidgets.html#gimp-coordinates-new"><tt class="function">gimp_coordinates_new()</tt></a> to set
up two GimpSizeEntries (see <a href="GimpSizeEntry.html" title="GimpSizeEntry"><span class="type">GimpSizeEntry</span></a>) linked with a <a href="GimpChainButton.html" title="GimpChainButton"><span class="type">GimpChainButton</span></a>.
</p></div></div><table class="navigation" width="100%" summary="Navigation footer" cellpadding="2" cellspacing="0"><tr valign="middle"><td align="left"><a accesskey="p" href="GimpButton.html"><b>&lt;&lt;<EFBFBD>GimpButton</b></a></td><td align="right"><a accesskey="n" href="GimpColorArea.html"><b>GimpColorArea<EFBFBD>&gt;&gt;</b></a></td></tr></table></body></html>