Vala and Genie programming

[seeker]

Lobster,

I just tried to compile hello-gtk.gs with Genie and got the same error you had. I noticed the line 'add (button)' was indented with two tab characters so I replaced the tabs with 8 spaces. It didn't compile so I added a blank line , without any indentation, at the end of the code and then it compiled. Using Vala 0.5.7 and Puppy 4.1.2 frugal.

Seeker

[Lobster]

Thanks seeker

that is good advice
(didn't seem to help)

The Valide editor seems to be the source of serious problems for me
- or maybe it is the required libraries for gtk compiling . . .
- it effects other editors and even Seamonkey, so that invoking save as crashes the program you are activating save as and sometimes even save from
this effects things too drastically to use it
and I must for now stick with Geany editor or Medit editor

I have noticed this on three pristine installs of Puppy

for now I will be using

• Puppy 4.12
  and the devxx
  vala-05.7.pet
  libgee-20081125-i486.pet
  medit-0.9.4.pet
  genie.lang_medit.tar.gz

Valide is however potentially an excellent IDE for Vala/Genie
so if anyone can replicate this behaviour and find out what and why
that would be great

[MU]

- it effects other editors and even Seamonkey, so that invoking save as crashes the program you are activating save as and sometimes even save from
this effects things too drastically to use it

Maybe I know the reason.
When you used the IDE, delete the file:
/root/.recently-used.xbel

It seems that Puppys programs use an older syntax in it, while new programs like Valide use a new syntax. It is a XML file, that you can look at in an editor.
It stores the "recently used" entries in the Gtk filedialog, so there is no problem to delete it.

Puppys libraries slowly start to get outdated, such issues might happen more often in future, using new programs.
Mark

[Mr. Maxwell]

I have medit and the genie launguage specs package installed but how do I turn on the genie syntax highlighting?

EDIT:

Never mind, a couple reboots later it works.

[Lobster]

Great tip MU - makes sense - it has been difficult
but hey this is cutting edge . . .

Never mind, a couple reboots later it works.

. . . we await your first programming examples

[Mr. Maxwell]

This should be an easy question, how do I use a window I made with Glade in Genie?

What about square roots and exponents?

[MU]

full example: glade window in Genie:
http://www.murga-linux.com/puppy/viewto ... 241#286241

A simpler example I attached here:
http://www.murga-linux.com/puppy/viewto ... 0&start=30
Mark

[Mr. Maxwell]

Thanks I'll take a look at it.

But now when I try to compile my program I get this error message:

Code: Select all

test.gs:5.22-5.36: error: The name `Gee' does not exist in the context of `main'
    var my_list = new list of int

My guess says that is caused by an error with Genie and Geelib. Any ideas on how to fix this?

[MU]

install:
http://distro.ibiblio.org/pub/linux/dis ... -0.1.5.pet

http://distro.ibiblio.org/pub/linux/dis ... -0.1.5.pet

Then in the Valaide, go to the options, and add as library there:
gee-1.0

On my system, the ide crashes again, if I go to the options
That worked right after I had installed it.
So I added with an editor:

Code: Select all

    <pkg>gee-1.0</pkg>

to the file:
/root/valide/gee1/gee1.vide

If your project has a different name and location, use the .vide file of your project.

If someone compiles by hand, use such a command:
valac --pkg=gee-1.0 hello.gs
Barry explains it here:
http://puppylinux.com/genie/datatypes.htm
Mark

[Mr. Maxwell]

Thanks! The "valac --pkg=gee-1.0 hello.gs" is what I needed. The IDE broke my puppy so I can't use it.

[Mr. Maxwell]

Now I have another problem. I have a list with many doubles in it, I wish to get rid of these doubles. If I try this code:

Code: Select all

for num:int in num_list
    if num not in finished_num_list
        finished_num_list.add(num)

I get this error:

Code: Select all

test.gs:16.18-16.20: error: syntax error, expected end of line but got `!' with previous identifier
        if num not in finished_num_list
               ^^^
test.gs:21-1-21-0: error: syntax error, expected identifier

Compilation failed: 2 error(s), 0 warning(s)

When I try this code:

Code: Select all

for num:int in num_list
    if not (num in finished_num_list)
        finished_num_list.add(num)

It compiles just fine but I get this message when I try to run it:

Code: Select all

Segmentation fault

Both of those work fine in python and should work with other launguages. Any ideas?

[MU]

Ok, I used a testprogram:

Code: Select all

[indent=2]
init

  var num_list = new list of int
  num_list.add(1)
  num_list.add(2)
  
  var finished_num_list = new list of int

  for num in num_list
    print("testing: %d" , num)
    if not finished_num_list.contains(num) 

      print("adding: %d" , num)
      finished_num_list.add(num)

  print("bye")

Looks slightly different to your code, but does the same (I also tested yours, and then mine, to check where the error ould be).
When I compile and run it in the IDE, it never reaches "bye".
Running in console, I also get the segmentation fault.
If I run it in the debugger, I get:

# valac --pkg=gee-1.0 main.gs
# gdb ./main
GNU gdb 6.7
Copyright (C) 2007 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "i486-t2-linux-gnu"...
(no debugging symbols found)
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) run
Starting program: /root/valide/gee1/main
(no debugging symbols found)
(no debugging symbols found)
testing: 1
adding: 1
testing: 2

Program received signal SIGSEGV, Segmentation fault.
0xb7ea1476 in g_int_equal () from /usr/lib/libglib-2.0.so.0
(gdb) backtrace
#0 0xb7ea1476 in g_int_equal () from /usr/lib/libglib-2.0.so.0
#1 0xb7f3d1d9 in gee_array_list_real_index_of (base=0x804f670, item=0x2) at arraylist.c:185
#2 0xb7f438ef in gee_list_index_of (self=0x804f670, item=0x2) at list.c:61
#3 0xb7f3e4d0 in gee_array_list_real_contains (base=0x804f670, item=0x2) at arraylist.c:174
#4 0xb7f3eabf in gee_collection_contains (self=0x804f670, item=0x2) at collection.c:39
#5 0x08048764 in _main ()
#6 0x08048829 in main ()
(gdb) quit
The program is running. Exit anyway? (y or n) y
#

So there is a bug concerning int types in lists.
I then used "uint" instead.
This works.
You just need to "cast" it to int, if you want to compare it to other integers, or print it.
This is done with

Code: Select all

(int) variablename

Here is a working example:

Code: Select all

[indent=2]

init

  var num_list = new list of uint
  num_list.add(1)
  num_list.add(2)
  
  var finished_num_list = new list of uint
  var a=0   
   
  for num in num_list 
    a = (int) num
    if not (num in finished_num_list) 
      print("adding: %d" , a)    
      finished_num_list.add(num)
      print("added: %d" , a)


  print("bye")

 

Mark

[Mr. Maxwell]

Thanks much better. I'm going to start working on the GUI now so I hope you're ready for more questions.

[mymas]

hi. I try to do cairo-sample in genie.
So, window open ok, but I cannot do picture-image output in window ...

Code: Select all

[indent=2]
uses 
  Gtk
  GLib
  Cairo
    
init 
  Gtk.init (ref args)
  var test = new CairoSample ()
  test.show_all ()
  Gtk.main ()

class CairoSample : Window
  init
    title = "Cairo Genie Demo"
    default_height = 550
    default_width = 450
    window_position = WindowPosition.CENTER
    
    destroy += Gtk.main_quit
    
    var drawing_area = new DrawingArea ()
    drawing_area.expose_event += on_expose
    add (drawing_area)
    
  def on_expose (da: DrawingArea, event: Gdk.EventExpose) : bool
    var ctx = Gdk.cairo_create (da.window)
    var surf = new Cairo.ImageSurface (Cairo.Format.ARGB32,240,80)
    ctx.save ()
    
    ctx.select_font_face ('serif', Cairo.FontSlant.NORMAL, Cairo.FontWeight.BOLD)
    ctx.set_font_size (32.0)
    ctx.set_source_rgb (0, 0, 1)
    ctx.move_to (10,50)
    ctx.show_text ('Hello, World')
    
    ctx.restore ()
    surf.write_to_png ('genie_cairotext.png')
    return true

umm... My code is not tidy...

[aragon]

New Version of Vala => 0.6

http://live.gnome.org/Vala/Release

aragon

[MU]

I made an iso with vala related stuff, like the IDE.
http://www.murga-linux.com/puppy/viewto ... 970#290970

It also includes Monodevelop with Valasupport.
There is a huge screenshot showing both IDEs in the end of that message.

I'll upgrade it to vala 0.6 next week, thanks aragon!

mymas,
sorry, I was too busy to try out your example
Hopefully can have a look at it this weekend.
Please let us know, if you have success!

Mark

[MU]

mymas

if I replace the singlequotes with doublequotes , your code works fine.
I changed 2 lines:
ctx.select_font_face ("serif", Cairo.FontSlant.NORMAL, Cairo.FontWeight.BOLD)
and:
ctx.show_text ("Hello, World")

Mark

[aragon]

hi mark,

heavy development, 0.7 is out...
http://live.gnome.org/Vala/Release

maybe thios is also something interesting

gtkaml: http://code.google.com/p/gtkaml/

gtkaml is an XML parser that extends the Vala.Parser (literally) and transforms all your tags into a valid Gtk+ UI class described in the Vala language.

aragon

[MUguest]

vala 0.7.0, compiled in Puppy 4.12:
http://dotpups.de/puppy4/dotpups/Programming/Vala/

I could not compile gtkaml.
Vala 0.7.0 no longer has all the headers in /usr/include/vala-1.0.
The headers were removed since 0.7.0, see official announcement.
Vala 0.5.7 was missing the required "valacodenode.h".

I could search for older versions of that file, but this might cause problems, so I prefer to wait, until a "proper" solution was found.
If someone urgently wants to test it, I might create a "unproper" pack using a external, older file.

Mark

[MUguest]

I added gtkaml-0.2.5-i486.pet.
To compile it, I first installed vala 0.6.0.
This installed the required header.
Then I installed again 0.7.0, and compiled gtkaml.

I did not test this library.

Mark