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    <p>I was at the very same crossroads, wth only some info and code on python gtk, but not in C.</p> <p>After looking the docs again and again I realized I got confuse by same sounding names, unions, structures and enums and bitfields. I was handling things as booleans, when it was a bitfield thingy all along.</p> <p>First:</p> <pre><code>g_signal_connect( G_OBJECT(window), "window-state-event", G_CALLBACK(callback_func), userDataPointer); </code></pre> <p>Then:</p> <pre><code>gboolean callback_func( GtkWidget *widget, GdkEventWindowState *event, gpointer user_data) { //some code //Minimized window check if(event-&gt;new_window_state &amp; GDK_WINDOW_STATE_ICONIFIED){ //some other code } //some more other code return TRUE; } </code></pre> <p>Remember this are bitfields and <code>&amp;</code> is the "bit and" operator <strong>not</strong> the boolean <code>&amp;&amp;</code>. <code>GDK_WINDOW_STATE_ICONIFIED =2</code> or <code>10</code> in binary and <code>event-&gt;new_window_state</code> is an <code>int</code> of which the second bit is active</p> <p>A Widget can be both maximized <strong>and</strong> minimized at the same time, <code>GDK_WINDOW_STATE_MAXIMIZED = 4</code> or <code>100</code></p> <p>If you minimized a maximized window its<code>event-&gt;new_window_state = 6</code> or 110</p> <p>You can experiment and see what works best for you.</p> <p>More info:</p> <ul> <li><a href="http://developer.gnome.org/gtk/stable/GtkWidget.html#GtkWidget-window-state-event" rel="noreferrer">http://developer.gnome.org/gtk/stable/GtkWidget.html#GtkWidget-window-state-event</a></li> <li><a href="http://developer.gnome.org/gdk/stable/gdk-Event-Structures.html#GdkEventWindowState" rel="noreferrer">http://developer.gnome.org/gdk/stable/gdk-Event-Structures.html#GdkEventWindowState</a></li> </ul> <p>Final Beware and caveats: </p> <p>I'm using gtk+2, because of dual win&amp;lin development. The newer gtk+3 might do some things different.</p> <p>The <a href="http://developer.gnome.org" rel="noreferrer">Gnome Developer Site</a> site has some links broken or wrong, or partially re-writen, with some errors. The page on the first url I put above has</p> <pre><code>gboolean user_function (GtkWidget *widget,GdkEvent *event,gpointer user_data){} </code></pre> <p>while the manual in the source code as well as other downloadable manuals has the correct:</p> <pre><code>gboolean user_function ( GtkWidget *widget, GdkEventWindowState *event, gpointer user_data){} </code></pre> <p>The page also has the <a href="http://developer.gnome.org/gdk3/stable/gdk-Event-Structures.html#GdkEventWindowState" rel="noreferrer">incorrect or broken link for the gtk3 page for <code>GdkEventWindowState</code></a>. The gtk+3 version seems as wrong as the gtk+2, I have not seen the gtk+3 manuals with the source code or separate so I don't know if gtk+3 truly modifies the callback for the event and the gdk structures</p> <p>For the moment as gtk+3 stabilizes*<em>expect</em>* inconsistencies. Use preferably the manuals that came with your source code or linux distro and version gtk+2.</p> <p>I hope this helps.</p>
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    1. POWhat is the Gtk event called when a window minimizes?
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    1. COWow, thanks. I gotta hand it to you, I wasn't expecting such a complete answer after all the earlier ones. Thanks , problem solved. :)
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