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POGtkmm: Connect signal handler to combobox in TreeView
 

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  1. POGtkmm: Connect signal handler to combobox in TreeView
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    <p>This is a follow-up question to this: <a href="https://stackoverflow.com/questions/8676942/how-do-i-add-a-combobox-to-a-treeview-column">How do I add a ComboBox to a TreeView column?</a></p> <p>I was able to place a ComboBox inside a TreeView with the options I need. But I can't seem to figure out how to connect a signal handler to it. All the existing documentation shows connect statements like this:</p> <pre><code>m_Combo.signal_changed().connect(sigc::mem_fun(*this, &amp;ExampleWindow::on_combo_changed) ); </code></pre> <p>But I'm not inside a Window class definition, and thus have no *this object. I'm using Glade to create the basic structures of the GUI.</p> <p>Also, all the existing documentation shows the signal handler doing something like this:</p> <pre><code>void ExampleWindow::on_combo_changed() { Glib::ustring text = m_Combo.get_active_text(); if(!(text.empty())) std::cout &lt;&lt; "Combo changed: " &lt;&lt; text &lt;&lt; std::endl; } </code></pre> <p>Where the "m_Combo" object is global, and can just be simply accessed. But When the ComboBox is inside a TreeView, it's dynamic. How would I go about actually accessing the ComboBox? Pass something through via a parameter? The signal_changed().connect() function seems to be really picky about its parameters. No matter what I give it, it spits out (literally) 100 lines of gibberish in compiler errors. Ends with:</p> <pre><code>/usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:6196:1: note: template&lt;class T_arg1, class T_arg2, class T_arg3, class T_arg4, class T_arg5, class T_arg6, class T_arg7, class T_return, class T_obj, class T_obj2&gt; sigc::bound_const_volatile_mem_functor7&lt;T_return, T_obj, T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6, T_arg7&gt; sigc::mem_fun(T_obj&amp;, T_return (T_obj2::*)(T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6, T_arg7)const volatile) make: *** [src/RTT_Client_GTK.o] Error 1` </code></pre> <p>Not making my life trying to debug any easier. </p>
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    1. COYou are quickly escaping where I can help, but on the first question: Are you not within a class at all? I mean, unless this is being done in your `main()` function, you should be in a class of some kind, right? Also, there is a way to pass signals directly to a function that is outside a class structure: http://developer.gnome.org/gtkmm-tutorial/unstable/sec-connecting-signal-handlers.html.en
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