I am working through your tutorial, and it's been a big help with getting started. I did encounter an issue at the very beginning, and including a note about how to resolve this may help other beginners who encounter this issue. In the Glib Installation section, when I ran meson --prefix $HOME/local _build I got the error meson.build:1:0: ERROR: Compiler cc can not compile programs. I was able to resolve it with sudo apt install gcc-multilib The solution was not obvious from the meson-log.txt

In case its relevant, I'm on Linux Mint 20, which is based on Ubuntu 20.04.

Edit: For anyone looking for a solution to this problem in the future, I would guess apt-get install libc-dev is what is most likely to fix your issues

In the end of section 9 you are creating a resources.c file with gresource but in tfe3_r.c, you are not using it.

Then a C source file resources.c is generated. Modify tfe3.c and save it as tfe3_r.c.

> #include "resources.c"
> ... ... ...
> ... ... ...
> build = gtk_builder_new_from_resource ("/com/github/ToshioCP/tfe3/tfe3.ui");
> ... ... ...
> ... ... ...

Then, compile and run it. The window appears and it is the same as the screenshot at the beginning of this page.

U still pointing previously created ui file. What is the point here? And after getting resource.c and compiling it with tfe3_r.c, im getting

/home/dnf/codeblockprojs/tfe3/resources.c|147|multiple definition of `tfe3_get_resource'; obj/Debug/resources.o:/home/dnf/codeblockprojs/tfe3/resources.c:147: first defined here|

The code is in resources.c:

.
.
static GStaticResource static_resource = { tfe3_resource_data.data, sizeof (tfe3_resource_data.data) - 1 /* nul terminator */, NULL, NULL, NULL };

G_MODULE_EXPORT
GResource *tfe3_get_resource (void);
GResource *tfe3_get_resource (void)
{
  return g_static_resource_get_resource (&static_resource);
}
/* GLIB - Library of useful routines for C programming
 * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
 *
.
.

if i comment out second definition, programs builds and run but i didnt understand what is the problem here.

Found a small typo in section 3 :GtkApplicationWindow.

Extra space in the third line: Now rewrite the program and use GtkAppliction Window.

""GtkAppliction Window"" --> ""GtkApplictionWindow""

By the way, your tutorial is really great! It helped me a lot. Thank yoooooooou!

Hello! This is not a issue, but a request (very politely).

First of all thank you very much for your tutorial and code examples, it is helping me a lot in process.

I would like to ask you for a more complete tutorial section regarding GObject, can you do it?

Thank you, and keep your amazing work.

Comments welcome - added as Section 29, ('sec29.src.md') but could probably be slotted in somewhere else.

This was the result of some other experimentation that I was doing, and could probably do with some code review. I was looking for a simple example of an animated image.

I don't know what additional optimizations are available for GTK4 code.. like only erasing and redrawing the clock hands.. (would that be a thing?)

Depending on where it fits in the other sections, it could be changed to use a Makefile.

Regards, Paul

Hi, thanks for the tutorial! I ran rake pdf on HEAD (fbbaa8c) but got this error:

> rake cleanlatex pdf
[...]
(/usr/share/texmf-dist/tex/latex/microtype/mt-msb.cfg) (./abstract.tex

! LaTeX Error: Something's wrong--perhaps a missing \item.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...

l.12   S
      ection 3 to 21 describes basics and the example is a simple editor
?

Generated latex/abstract.tex:

\hypertarget{about-this-tutorial}{%
\paragraph{About this tutorial}\label{about-this-tutorial}}

This tutorial is aimed at beginners who are learning Gobject system. One
[...]

Environments:

• LuaHBTeX, Version 1.13.2 (TeX Live 2021/Arch Linux)
• LaTeX2e <2021-11-15> patch level 1
• L3 programming layer <2021-11-22>
• pandoc 2.14.1 Compiled with pandoc-types 1.22, texmath 0.12.3.1, skylighting 0.11, citeproc 0.4.1, ipynb 0.1.0.1

It seems that abstract environments can't contain \paragraphs:

> cat foo.tex
\documentclass{article}
\begin{document}
\begin{abstract}
\paragraph{About this tutorial}This tutorial aimed...
\end{abstract}
\end{document}

> lualatex foo.tex
[...]
(./foo.tex
[...]
! LaTeX Error: Something's wrong--perhaps a missing \item.

and here are related discussions and workarounds:

• https://tex.stackexchange.com/questions/74371/subdividing-structured-abstracts/74374#74374
• https://github.com/latex3/latex2e/issues/248
• https://www.nlm.nih.gov/bsd/policy/structured_abstracts.html

There are Gtk-CRITICAL when run list3.c example.

sh-5.1$ ./a.out 

(a.out:33843): Gtk-CRITICAL **: 03:22:40.840: Error building template for list item: .:0:0: No function named `get_file_name`.

(a.out:33843): Gtk-CRITICAL **: 03:22:40.840: Error building template for list item: .:0:0: No function named `get_file_name`.

(a.out:33843): Gtk-CRITICAL **: 03:22:40.840: Error building template for list item: .:0:0: No function named `get_file_name`.

Compiled with gcc `pkg-config --cflags gtk4` c.c `pkg-config --libs gtk4`

GTK version: 4.2.1-1 Linux: Arch

https://github.com/ToshioCP/Gtk4-tutorial/blob/main/gfm/sec15.md - can you add the command to compile it from the commandline?

I think it would be useful to be able to quickly copy/paste the command. One can assemble it from the www but I think having it in the .md file on the end of that file would be very convenient. Thank you for reading!

Probably something needs to be added for it to work as a seperate .ui file. It would be nice if this where to be fixed, as it is suggested at the end of the section as well as during the beginning.

error message: Template declaration (class 'GtkListItem', parent 'GtkWidget') where templates aren't supported

What's the meaning of this line?

https://github.com/ToshioCP/Gtk4-tutorial/blob/ee6a19fe3ae212beeb458c2a17f9cc0f3b9ef39e/gfm/sec6.md?plain=1#L162

In my C learning, struct is define with {}. Maybe I'm too poor to understand it.

祝好/Best Wishes

I need to fix this,help is needed. Error:----- (a.out:8740): Gtk-WARNING **: 11:21:38.293: Unknown key gtk-button-images in /home/user/.config/gtk-4.0/settings.ini

(a.out:8740): Gtk-WARNING **: 11:21:38.297: Unknown key gtk-menu-images in /home/user/.config/gtk-4.0/settings.ini

(a.out:8740): Gtk-WARNING **: 11:21:38.297: Unknown key gtk-toolbar-style in /home/user/.config/gtk-4.0/settings.ini

(a.out:8740): Gdk-WARNING **: 11:21:38.446: The program 'a.out' received an X Window System error. This probably reflects a bug in the program. The error was 'GLXBadFBConfig'. (Details: serial 229 error_code 167 request_code 152 (GLX) minor_code 0) (Note to programmers: normally, X errors are reported asynchronously; that is, you will receive the error a while after causing it. To debug your program, run it with the GDK_SYNCHRONIZE environment variable to change this behavior. You can then get a meaningful backtrace from your debugger if you break on the gdk_x_error() function.)

When trying to copy a codeblock from a tutorial section, the line numbers also being copied along with the code even with the copy button on top right

please fix them

Dear Mr. Toshio,

some weeks ago I created my first GtkColumnView example. I will use that for my SDT tool, and additional use it for a section of my GTK4 book. But I think before introducing ColumnView in my book, I should introduce GtkListView. The whole GtkListView and GtkColumnView stuff is unfortunately not that easy, and the official introductions are not that great and incomplete. I think your GtkListView introduction is currently the best what we have -- as it provides complete examples with and without the use of XML UI files.

One related question: For my own GtkColumnView Nim code, I needed editable text. One way to get editable text is to use the GtkText widget, connect the activate signal to the GtkText widgets, and use ID numbers assigned in the "bind" callback to store the edited text where we need it. I think for a GtkListView editable entries are rarely needed, but still I wonder how we could change your examples (preferable the fist one, without use of UI files) to use editable text and to save the edits in the model. Is there some property binding available, or would you have to use the activate signal of the GtkEntry widget to store the edited strings somehow?

I can currently not remember if your GtkListView example allows adding new rows dynamically, and to delete rows. I think your example does not support that currently, but it would be really useful. Reordering rows by drag and drop would be nice as well, but not that important. I have never used drag and drop myself in Nim before, but maybe it is time to learn it. I found a Python example recently (https://discourse.gnome.org/t/reorder-rows-in-a-list-gtk4/8422/4), so it seems to work.

Unfortunately I will have not much free time in the next months to work on my GTK4 or Nim book, or on the SDT tool. But I will try to continue next year. This summer I unfortunately spent my full holiday on my old tiny chess engine. Maybe wasted time, but the old code which I created seven years ago was just too ugly, and I feel better with the new version :-) And from time to time it is just fun to play some chess against the computer, even when the current GTK GUI is very restricted.

Best regards,

Stefan Salewski

Hi, Toshio. This tutorial is great, thus I want to help you translate it into Chinese. But I'm not familiar with ruby and front-end things. If you want to do this, too, you may need to

1. Reorganize the src directory to better support multi-languages.
2. Add a language select button to the navigation bar.

I will be happy to translate this tutorial if you modify related files to support translation.

!) how a widget is created and chained up to the parent requires explanation as GTK4 does not handle command line arguments and is required to know the steps to write correct code in GTK.