<p></p>
<p>This is a duplicate of <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="299407125" data-permission-text="Title is private" data-url="https://github.com/geany/geany/issues/1778" data-hovercard-type="issue" data-hovercard-url="/geany/geany/issues/1778/hovercard" href="https://github.com/geany/geany/issues/1778">#1778</a> <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="307419694" data-permission-text="Title is private" data-url="https://github.com/geany/geany/issues/1815" data-hovercard-type="issue" data-hovercard-url="/geany/geany/issues/1815/hovercard" href="https://github.com/geany/geany/issues/1815">#1815</a> <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="318968164" data-permission-text="Title is private" data-url="https://github.com/geany/geany/issues/1848" data-hovercard-type="issue" data-hovercard-url="/geany/geany/issues/1848/hovercard" href="https://github.com/geany/geany/issues/1848">#1848</a>, but here is a solution.<br>
I see that in mate-appearance-properties the mouse scroll works very well like this:</p>
<pre><code>#include <gdk/gdk.h>
#if GTK_CHECK_VERSION (3,0,0)
gtk_widget_add_events (GTK_WIDGET (notebook1), GDK_SCROLL_MASK);
g_signal_connect (GTK_WIDGET (notebook1), "scroll-event",
                                G_CALLBACK (capplet_dialog_page_scroll_event_cb),
                                GTK_WINDOW (window));
#endif
</code></pre>
<p><a href="https://github.com/mate-desktop/mate-control-center/blob/master/capplets/appearance/appearance-main.c#L208">source</a> + <a href="https://github.com/mate-desktop/mate-control-center/blob/master/capplets/common/capplet-util.c#L173">capplet_dialog_page_scroll_event_cb function</a></p>

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