[balsa/popover: 51/65] balsa-index: pop up the context menu on the left

[Peter Bloomfield <peterb src gnome org>]

commit 5737e50a986a2436623b48da1977376576b78d78
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Mon Jun 22 19:04:25 2020 -0400

    balsa-index: pop up the context menu on the left
    
    The default position is above the pointer, but that is often infeasible,
    so it is actually popped below. But when a submenu like "toggle" or
    "move" is selected, it pops up above, if feasible, which is not a
    smooth transition. If we choose on the left, there seems to be much less
    chance that it is infeasible, so the submenus transition smoothly. That
    may depend on the panes layout, for which I'm using the default. We
    could perhaps use a layout-dependent choice.

 src/balsa-index.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/balsa-index.c b/src/balsa-index.c
index 70b61e104..ee73d320f 100644
--- a/src/balsa-index.c
+++ b/src/balsa-index.c
@@ -2039,6 +2039,8 @@ bndx_popup_menu_create(BalsaIndex * bindex)
     bindex->popup_menu = menu;
     bindex->popup_widget =
         libbalsa_popup_widget_new(GTK_WIDGET(bindex), G_MENU_MODEL(menu), "popup");
+    if (GTK_IS_POPOVER(bindex->popup_widget))
+        gtk_popover_set_position((GtkPopover *) bindex->popup_widget, GTK_POS_LEFT);
 }
 
 /* bndx_do_popup: common code for the popup menu;