This only happens when "/org/gnome/desktop/wm/preferences/action-middle-click-titlebar" is set to "minimize".

Created attachment 353992 [details] [review]
Patch for button_event_cb in pathbar

This suggested change handles the middle click (like the right click) already on the button-press-event and not the button-release-event.

Review of attachment 353992 [details] [review]:

Code looks good! Can you write a proper commit message?

Some guidelines: https://wiki.gnome.org/Newcomers/SubmitPatch

Review of attachment 353992 [details] [review]:

::: src/nautilus-pathbar.c
@@ +1534,3 @@
             return TRUE;
         }
+        else if (event->button == 2 && mask == 0)

Could you maybe use GDK_BUTTON_MIDDLE instead of the 2 there? It’s more readable that way.

@@ +1553,3 @@
         }
 
+        if (event->button == 1 && mask == GDK_CONTROL_MASK)

Same here, but GDK_BUTTON_PRIMARY.

Created attachment 353999 [details] [review]
nautilus-pathbar: Handle middle click on button press

I changed the numbers to gdk constants and added more explanation to the commit message.

(In reply to elias from comment #5)
> Created attachment 353999 [details] [review] [review]
> nautilus-pathbar: Handle middle click on button press
> 
> I changed the numbers to gdk constants and added more explanation to the
> commit message.

I think you forgot to commit your changes. :p

Created attachment 354030 [details] [review]
nautilus-pathbar: Handle middle click on button press

This time with comitted changes...

Review of attachment 354030 [details] [review]:

Looks good, thanks.

Attachment 354030 [details] pushed as e671217 - pathbar: Handle middle click on button-press-event