Re: Tutorial for writing widgets in Gtk3

[Scott Mayo <scott mayo comcast net>]

I’ll second this. Gtk is complex, with three layers (gtk, gdk, g). Then there are separate pieces like pango 
and Cairo. It’s not obvious how it all fits together and a slew of depreciation makes it hard to untangle. 

What’s needed is a full blooded example. Start from main and show a pure gtk+3 app that takes button press, 
mouse moves, text entry and keystrokes, and uses them to update labels with different markup options. Throw 
in a clock display to show timers. Use multiple threads to show how to add idle functions. Use css. 

It’s easier to grab a generic, fully featured example and cut it down than start with disjoint pieces. But I 
didn’t find one. 

> On Jul 26, 2018, at 3:59 AM, Timm Bäder <mail baedert org> wrote:
>
> That pointer is just not used because this is a minimal example that doesn't
> even do any custom drawing. If you don't use it, don't declare it.
>
> The cairo_t gets passed to the draw implementation by GTK+, it's
> a parameter to the my_button_draw function. See also the
> documentation for gtk_widget_draw().
>
>
> > On 2018-07-26 10:00, Göran Hasse wrote:
> > If you look in the widget_class->draw section
> > MyButton *button = MY_BUTTON(widget);
> > Why is this pointer to button created? It is not used!
> > And where is the cairo_t *cr comming from?
> > This is a turorial that is not so easy to understand...
> > /gh
> > > Den 2018-07-26 kl. 08:39, skrev Timm Bäder:
> > > > On 2018-07-26 09:42, Göran Hasse wrote:
> > > > Hello!
> > > > I try to write a custom widget in Gtk3. I study the source for other
> > > > widgets but I find no totorial
> > > > for how to write a widget in Gtk3. (There was for Gtk2 - but they are
> > > > not of any use anymore...).
> > > > Is there no interest in Gtk3 anymore? I find it very hard to find
> > > > tutorials for Gtk3.
> > > There's https://wiki.gnome.org/HowDoI/CustomWidgets
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