Make the input flat

[alainm23]

Fixed #275

[ryonakano]

It looks like the replace_text handler no longer working with this branch.

This branch:

Latest origin/main (479cc48):

[ryonakano]

I see the following critical warnings on the terminal:

(io.elementary.calculator:8416): GLib-GObject-CRITICAL **: 13:11:24.552: invalid (NULL) pointer instance

(io.elementary.calculator:8416): GLib-GObject-CRITICAL **: 13:11:24.552: g_signal_connect_object: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

And these warnings are out at src/MainWindow.vala:474 according to gdb:

user@elementary-8:~/work/calculator$ G_DEBUG=fatal-criticals gdb io.elementary.calculator 
:

(io.elementary.calculator:8889): GLib-GObject-CRITICAL **: 13:14:54.928: invalid (NULL) pointer instance

Thread 1 "io.elementary.c" received signal SIGTRAP, Trace/breakpoint trap.
0x00007ffff7ec56a1 in g_logv () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
(gdb) bt
#0  0x00007ffff7ec56a1 in g_logv () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007ffff7ec5953 in g_log () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffff7e3d5aa in g_type_check_instance () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0
#3  0x00007ffff7e251a9 in g_signal_connect_object () at /lib/x86_64-linux-gnu/libgobject-2.0.so.0
#4  0x00005555555677fb in pantheon_calculator_main_window_constructor (type=Python Exception <class 'gdb.error'>: No type named TypeNode.
, n_construct_properties=5, construct_properties=0x7fffffffcf60) at ../src/MainWindow.vala:474

[alainm23]

Sorry, I didn't know about that feature. I went back to using Gtk.Entry and applied CSS instead.

[ryonakano]

From #275 (comment):

That's true, but Gtk.Entry has other classes that still show the focus or active border when the input is focused.

This may be due to the following lines? Isn't there any way to just remove the focused style class and avoid re-implementing the entry.flat class here? 🤔

https://github.com/elementary/stylesheet/blob/b92637c9608a2455060b89fe17c8be98ffaaf355/src/gtk-4.0/widgets/_entries.scss#L21-L23