Re: [Vala] vala-list Digest, Vol 143, Issue 1

[gavr <gavr123456789 gmail com>]

Thank you, there are no examples at all for LibDazzle + Vala. When I first
found vala and asked on Reddit
<https://www.reddit.com/r/vala/comments/9tui22/build_a_graph_with_vala/>
for a widget to display graphs, no one answered anything.
So soon I made a very bad one
<https://www.reddit.com/r/vala/comments/a09p11/graph_in_vala_with_canvas_custom_widget_and/>.
(I needed it for the laboratory at the University)
In the code of your message for some reason there were no spaces, here is
the corrected version <https://pastebin.com/V1AkuAvm>.

пт, 3 янв. 2020 г. в 15:45, <vala-list-request gnome org>:

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>    1. Snippet: Dazzle.GraphView hello world (grindhold)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 3 Jan 2020 13:35:59 +0100
> From: grindhold <grindhold skarphed org>
> To: vala-list gnome org
> Subject: [Vala] Snippet: Dazzle.GraphView hello world
> Message-ID: <cd31780b-67f0-4918-216c-01b34eff4d25 skarphed org>
> Content-Type: text/plain; charset="utf-8"
>
> Because i could not find one and i wanted to play around with it, I
> wrote a hello-world-style application that uses libdazzle's graphview
> courtesy to chergert.
>
> I figured this could be useful to other people who want to get started
> with it and prefer not to dig through gnome-usage's source.
>
>
> Compile with: valac --pkg gtk+-3.0 --pkg libdazzle-1.0 <file.vala>
>
>  1. publicstaticintmain(string[]argv){
>  2. Gtk.init(refargv);
>  3. varwin =newGtk.Window();
>  4. vargv =newDazzle.GraphView();
>  5. vargm =newDazzle.GraphModel();
>  6. varb =newGtk.Button.with_label("add datapoint");
>  7. varbox =newGtk.Box(Gtk.Orientation.VERTICAL,10);
>  8. vargc =newDazzle.GraphColumn("The Value",Type.from_name("gdouble"));
>  9. vargr =newDazzle.GraphLineRenderer();
> 10. varl =newGtk.Label("asdf");
> 11. ?
> 12. gm.set_timespan(TimeSpan.MINUTE);
> 13. gm.set_max_samples(30);
> 14. gm.add_column(gc);
> 15. ?
> 16. b.clicked.connect(()=>{
> 17. Dazzle.GraphModelItergi;
> 18. gm.push(outgi ,GLib.get_monotonic_time());
> 19. Dazzle.GraphModel.iter_set_value(gi,0,Random.double_range(0,100));
> 20. message("added");
> 21. });
> 22. gm.changed.connect(()=>{message("changed");});
> 23. box.expand=true;
> 24. gv.expand=true;
> 25. box.pack_start(b,false,false,0);
> 26. Gdk.RGBA linecol =Gdk.RGBA();
> 27. linecol.red =1.0;linecol.green=0.0;linecol.blue=0.0;linecol.alpha=1.0;
> 28. gr.stroke_color_rgba=linecol;
> 29. gr.line_width =1;
> 30. gr.column =0;
> 31. gv.add_renderer(gr);
> 32. box.pack_start(gv,true,true,0);
> 33. box.pack_start(l,false,false,0);
> 34. gv.set_model (gm);
> 35. win.add(box);
> 36. win.show_all();
> 37. win.delete_event.connect(()=>{Gtk.main_quit();returntrue;});
> 38.
> 39. Gtk.main();
> 40. return0;
> 41. }
>
> Enjoy :)
>
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