Program suddenly quits after hiding Gtk::Window(Gtk::WINDOW_POPUP) (Attachment included)

[Phong Cao <phngcv gmail com>]

Hello everybody,

I am writing a small media player that allows the users to click on Gtk::DrawingArea to switch to fullscreen() or unfullscreen() mode, as well as hide() or show() a popup window (which is used to put play/pause/stop/progress widgets on top to control the progress of the video)

- When the users do a double right-click, the main window will be fullscreen() or unfullscreen().

- If the users do a right-click, and the window is in fullscreen() mode, the popup window will be hide() or show().

However, whenever I switch to fullscreen() mode (which also show() the popup window), then right-click 3 times (hide(), show(), then hide() the popup window), the whole program suddenly quits. I dont know why this happens and whether this is because of me.

I already attached the source code of the program with this email. If you can please download and see what I did wrong. 

Just uncompress it & run `make` to compile. My program uses gtkmm-3.0

Thank you for reading my message! Have a good Thanksgiving!

Best regards,

-- 
Phong V. Cao

phngcv gmail com

Attachment: topwin.zip
Description: Zip archive