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<h1>GUI mixins</h1> </div>
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<tr><td colspan="2"><h2><a name="nested-classes"></a>
Classes</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structLV2_1_1NoUserResize.html">LV2::NoUserResize< Required ></a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structLV2_1_1FixedSize.html">LV2::FixedSize< Required ></a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structLV2_1_1Presets.html">LV2::Presets< Required ></a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structLV2_1_1WriteMIDI.html">LV2::WriteMIDI< Required ></a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structLV2_1_1URIMap.html">LV2::URIMap< Required ></a></td></tr>
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<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>These classes implement extra functionality that you may want to have in your <a class="el" href="classLV2_1_1GUI.html">GUI</a> class, just like the <a class="el" href="group__pluginmixins.html">plugin mixins</a> do for plugin classes. Some of them are template classes with a boolean <code>Required</code> parameter - if this is true the <a class="el" href="classLV2_1_1GUI.html">GUI</a> will fail to instantiate unless the host supports the extension implemented by that mixin. For example, if you wanted a <a class="el" href="classLV2_1_1GUI.html">GUI</a> that wrote a MIDI Note On event to port 3 in the plugin whenever the user clicked a button, you could do it like this:</p>
<div class="fragment"><pre class="fragment"><span class="preprocessor">#include <lv2gui.hpp></span>
<span class="preprocessor">#include <gtkmm.h></span>
<span class="keyword">class </span>MyGUI : <span class="keyword">public</span> LV2::GUI<MyGUI, LV2::URIMap<true>, LV2::WriteMIDI<true> > {
<span class="keyword">public</span>:
MyGUI(<span class="keyword">const</span> <span class="keywordtype">char</span>* plugin_uri)
: m_button(<span class="stringliteral">"Click me!"</span>) {
pack_start(m_button);
m_button.signal_clicked().connect(sigc::mem_fun(*<span class="keyword">this</span>, &MyGUI::send_event));
}
<span class="keyword">protected</span>:
<span class="keywordtype">void</span> send_event() {
uint8_t noteon[] = { 0x90, 0x50, 0x40 };
write_midi(3, 3, noteon);
}
Gtk::Button m_button;
};
</pre></div><p>The function <code>write_midi()</code> is implemented in <a class="el" href="structLV2_1_1WriteMIDI.html">LV2::WriteMIDI</a> and thus available in <code>MyGUI</code>. <a class="el" href="structLV2_1_1WriteMIDI.html">LV2::WriteMIDI</a> requires that <a class="el" href="structLV2_1_1URIMap.html">LV2::URIMap</a> is also used (because of the way event types work in LV2) - if you don't add <a class="el" href="structLV2_1_1URIMap.html">LV2::URIMap</a> as well you will get a compilation error. </p>
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