I have used let-ui and it's very nice for GUI. Bye-bye GtkBuilder. :)
The only thing I miss is non-widget objects like GtkTreeViewColumn,
GtkCellRenderer and so on.
Is it possible to enhance let-ui this way?

gtk-main should be wrapped by gdk-threads-enter/leave when threading is enabled.

First run of make-instance for custom gobject returns lisp object, but underlying pointer to gobject is null. GLib prints errors to console.

This code

(asdf:oos 'asdf:load-op :cl-gtk2-gtk)

(defclass klass (gobject:g-object)
()
(:metaclass gobject:gobject-class)
(:g-type-name . "Klass"))

(gobject:register-object-type-implementation "Klass" klass "GObject" nil nil)

(print (gobject:pointer (make-instance 'klass)))
(print (gobject:pointer (make-instance 'klass)))
(quit)

prints

WARNING: GType Klass is not known to GObject
WARNING: GType Klass is not known to GObject
WARNING:
Declared GType name 'Klass' for class 'KLASS' is invalid (g_type_name returned 0)

(sbcl-cl-gtk2.exe:1860): GLib-GObject-CRITICAL **: g_object_newv: assertion `G_TYPE_IS_OBJECT (object_type)' failed

(sbcl-cl-gtk2.exe:1860): GLib-GObject-CRITICAL **: g_object_add_toggle_ref: assertion `G_IS_OBJECT (object)' failed

(sbcl-cl-gtk2.exe:1860): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed

.(SB-SYS:INT-SAP #X00000000)

.(SB-SYS:INT-SAP #X01134170)

It seems pack-child is using a old version of the table-attach function:

https://github.com/dmitryvk/cl-gtk2/blob/master/gtk/gtk.layout-containers.lisp#L192

https://github.com/dmitryvk/cl-gtk2/blob/master/gtk/ui-markup.lisp#L85

mail by Maciej Katafiasz [email protected]
"Actually, I just found the cause, sort-of. It's because I had
accessibility enabled, which creates an extra thread, which then gets
stuck somewhere in pthread_cond_wait(). I haven't quite found out why
that happens yet, but at least I know where to look."

The definition of table-attach has left, right, bottom, and top as required arguments
but the call to the function uses keyword argument syntax :left left :right right etc.

I've created a PR for this, and made a simple fix. I've changed the call-site to match the function definition.

See. #11

The correct one is:

(defcfun (tree-view-expand-row "gtk_tree_view_expand_row") :boolean
(tree-view g-object)
(path (g-boxed-foreign tree-path))
(open-all :boolean))

Note the boolean argument.

Log is here: http://report.quicklisp.org/2020-09-30/failure-report/cl-gtk2.html#cl-gtk2-gtk

I get this: Lock on package SB-UNIX violated when interning SIGPIPE-HANDLER while in package GTK.

Hi all!

If you interested in maintaining this project, please contact me.

With sbcl 1.0.42, after
(asdf:operate 'asdf:load-op :cl-gtk2-gtk)
I can't abort execution of (sleep 10) with C-c C-c in SLIME, and with C-c in sbcl console.

1.0.39 works just fine.

Following code produces memory fault error.

(let ((w (make-instance 'gtk:entry
           :secondary-icon-stock "gtk-execute"
           :secondary-icon-tooltip-text "some text")))
(print w))

But this code doesn't

(let ((w (make-instance 'gtk:entry
           :secondary-icon-stock "gtk-execute")))
(setf (gtk:entry-secondary-icon-tooltip-text w) "some text")
(print w))

Error looks like:

CORRUPTION WARNING in SBCL pid 9978(tid 140737353987824):
Memory fault at 8 (pc=0x7fffe9ba3cce, sp=0x7fffef8c7250)
The integrity of this image is possibly compromised.
Continuing with fingers crossed.

debugger invoked on a SB-SYS:MEMORY-FAULT-ERROR in thread #<THREAD
                                                        "initial thread" RUNNING
                                                        {1002E8A001}>:
Unhandled memory fault at #x8.