New feature: a GUI proxy for BaCon

[rikky]

Problem solved indeed. 

[vovchik]

Dear all,

Here is a partially working port of an old HUG svg demo I did years ago. I am now porting it to the new GUI proxy, and have run into a little problem in that I don't quite know how to stop the animation. A keypress or Pause button click should do it (as in the HUG version), but I am still missing some gtk/gdk thread handler or idle function. Any suggestions? I know we are all experimenting now, but Peter probably knows the best method in this circumstance.

With kind regards,
vovchik

Attachments:

hypnosis-grad-inline-gtk2-vov.bac.tar.gz (2.64 KB)

[Pjot]

Hi vovchik,

Thanks for this port. The problem you are facing is the issue of async updates outside the main eventloop. As mentioned before, you can use the ALARM statement for this.

I took the liberty of modifying your program, it is attached to this post. Hope this is what you are looking for? Note that we do not need to update GTK in between, so I removed that part.

Best regards
Peter

PS yesterday I investigated the GtkGLArea, we can use it but unfortunately the GTK developers have decided to go for the new 'core API' of OpenGL 3.2 and higher.

So that means we need to define a vertex buffer, a vertex array, then a vertex shader and fragment shader in OpenGL Shader Language, and lastly, dump the whole thing using using glDrawArray, and all this is needed even when we only need to draw a simple line. Or even draw a simple pixel.

IMHO it's a ridiculous decision from the GTK developers, especially because now also they have excluded low-end systems which do not have access to OpenGL 3.x. Apparently, they think we all are going to implement a high-end 3D engine or something like that...

Attachments:

hypnosis-grad-inline-gtk2-vov.bac (6.6 KB)

[vovchik]

Dear Peter,

Thanks a million! Because of my slow hardware, I set the ALARM msec to 100 - it prevents stalling and reduces the CPU load. Now working nicely, and I know how to do it for ports of earlier HUG versions I will do and post shortly. I have attached gtk2 and gtk3 versions. I set the msec higher for gtk3 since, otherwise I get stalling - it seems gtk3 is more CPU intensive.

With kind regards,
vovchik

Attachments:

hypnosis-grad-inline-gtk2-vov.bac.tar.gz (2.66 KB)

[Pjot]

Hi vovchik,

Well, instead of ALARM, you can also use g_timeout_add and g_source_remove. This, however, adds another global variable in your program, but the program does not stall.

Even so, when putting the value in g_timeout_add to a low value, then there may be no animation. But 20msecs works for me without stalling.

BR
Peter

Attachments:

hypnosis-grad-inline-gtk2-vov.bac (6.75 KB)

[vovchik]

Dear Peter,

I am getting this error - and no binary on Mint:

In file included from hypnosis-grad-inline-gtk2-vov.bac:247:0,
                from hypnosis-grad-inline-gtk2-vov.bac.c:2:
hypnosis-grad-inline-gtk2-vov.bac: In function ‘ANIM_START’:
hypnosis-grad-inline-gtk2-vov.bac:137:41: warning: passing argument 2 of ‘g_timeout_add’ makes pointer from integer without a cast [-Wint-conversion]
 Timeout_Status = g_timeout_add(20, G_SOURCE_FUNC(UPDATE), NULL)
                                        ^~~~~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/giochannel.h:33:0,
                from /usr/include/glib-2.0/glib.h:54,
                from /usr/include/glib-2.0/gobject/gbinding.h:28,
                from /usr/include/glib-2.0/glib-object.h:23,
                from /usr/include/glib-2.0/gio/gioenums.h:28,
                from /usr/include/glib-2.0/gio/giotypes.h:28,
                from /usr/include/glib-2.0/gio/gio.h:26,
                from /usr/include/gtk-2.0/gdk/gdkapplaunchcontext.h:30,
                from /usr/include/gtk-2.0/gdk/gdk.h:32,
                from /usr/include/gtk-2.0/gtk/gtk.h:32,
                from hypnosis-grad-inline-gtk2-vov.bac:15,
                from hypnosis-grad-inline-gtk2-vov.bac.c:2:
/usr/include/glib-2.0/glib/gmain.h:605:10: note: expected ‘GSourceFunc {aka int (*)(void *)}’ but argument is of type ‘int’
guint    g_timeout_add              (guint           interval,
         ^~~~~~~~~~~~~
hypnosis-grad-inline-gtk2-vov.bac.o: In function `ANIM_START':
hypnosis-grad-inline-gtk2-vov.bac.c:(.text.ANIM_START+0x6e): undefined reference to `G_SOURCE_FUNC'
collect2: error: ld returned 1 exit status
make: *** [hypnosis-grad-inline-gtk2-vov] Error 1


I wonder why G_SOURCE_FUNC is undefined...any idea?

With kind regards,
vovchik

[Pjot]

Dear vovchik,

No idea really... we're using plain C code now, and talking directly to GTK - and I am not a GTK guru

Maybe you can leave the G_SOURCE_FUNC out, or use a different cast in front of the function name, like (GSourceFunc)UPDATE or (GSourceFunc*)UPDATE.

HTH
Peter

[vovchik]

Dear Peter,

Thanks. (GSourceFunc)UPDATE did the trick.

WIth kind regards,
vovchik

[vovchik]

Dear all,

Here is another demo (gtk2/3) of a rotating cube. Seems to be working nicely.

WIth kind regards,
vovchik

Attachments:

vector-inline-gui-proxy.tar.gz (3.82 KB)

[Pjot]

Thanks vovchik,

Very cool - works on my Mageia Linux without problems!

BR
Peter

[bigbass]

hello vovchik

very impressive!
great to see your demo
doing 3D with svg's !
that's a real break though

P.S

there were many things we did in gtk2 and gtk3 a few years
ago that can be updated and improved on
and some new ideas after looking back with a little more experience
the reason I say this is because many GUI's
in linux use gtk and the more ways we can see it
are the more options we have to choose from

Joe

[vovchik]

Dear Joe,

Thanks. We are starting to get the hang of this. There are many demos to port, with various widgets, and a lot of DEFs and ALIASes to test. I think we will learn something. I used your gtk3 ALIASes when I was porting.

With kind regards,
vovchik

[alexfish]

Hi Peter

lastest beta Gtk Radio program Raspberry pi3 , got some problems

/home/pi/retestVG/mybuild/examples/tlse-master/examples/radiopr.bac:161:19: error: 'gtk_menu_popup_at_pointer' undeclared (first use in this function)

also getting xaw errors:

/usr/include/X11/Xaw3d/AllWidgets.h:34:8: error: unknown type name 'XmuWidgetNode'

have not tried motif

BR
Alex

[vovchik]

Dear Alex,

You have to install all the bits and then use a PRAGMA flag. I have attached my pi versions...and they compile and work.

With kind regards,
vovchik

Attachments:

radio-pi.tar.gz (7.65 KB)

[alexfish]

Hi Vovchik

Now get
gtk
collect2: error: ld returned 1 exit status

xaw gui shows but get

Warning: Missing charset in String to FontSet conversion

When closing xaw :: desktop menu and icons have Escaped :: need to Switch OFF PI , oh dear

Back Soon ::

BR
Alex