Python + pyGTK package for the DR v3.0

[Iñigo]

Hi Mackx,

I quick note as I will comment deeper in another message.

In the apps "python" launchers in version 3a you write "import appcalc.py". That's not correct python, it should be "import appcalc", without the extension.
You use the syntax "import module.submodule" to import some submodules from a big package, as in "import books.epub", where you have a module books with different submodules:

python26/
    lib/
        site-packages/
            books/
                __init.py__
                epub.py
                pdf.py
                ...

Anyway, good work.

[Iñigo]

Quick comment #2: can't load liberutils

root@qemuarm:/media/mmcblk0p1/Programs# ./_python26/bin/python
Python 2.6.4 (r264:75706, Mar 16 2010, 14:39:27) 
[GCC 4.3.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import ctypes as C
>>> erutils = C.cdll.LoadLibrary( 'liberutils.so.0' )
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/media/mmcblk0p1/Programs/_python26/lib/python2.6/ctypes/__init__.py", line 431, in LoadLibrary
    return self._dlltype(name)
  File "/media/mmcblk0p1/Programs/_python26/lib/python2.6/ctypes/__init__.py", line 353, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: /usr/lib/liberutils.so.0: undefined symbol: g_free

It happens both in qemu and DR800.

[Mackx]

Originally Posted by Iñigo

In the apps "python" launchers in version 3a you write "import appcalc.py". That's not correct python, it should be "import appcalc", without the extension.

Oops, yes, I totally missed that, I am so used to C ... I will fix it in the next version. Maybe I will also use the module.submodule construction for the er-modules.

[Mackx]

Originally Posted by Iñigo

Quick comment #2: can't load liberutils

It happens both in qemu and DR800.

Oops again ... the dependency for building liberutils is not correct, I fixed that locally but forgot all about it. I will create a new package with an install program for the updated file.
I added:
lib@PACKAGE_NAME@_la_LIBADD = $(DEPS_LIBS)
to the makefile of liberutils, see also bitbucket (I just pushed)

Thanks for reporting both comments (bugs !

[Mackx]

I created an installation package for the patched system-file. This is an update,
1) so first copy python26-dr-v2.tar.zip and
2) then the attached file (python26-dr-v4-upgrade.zip).
After re-inserting the SD card you will see 'Install Python Patch' in SD-Card/Programs/Install.
3) Click on the icon (note that this only needs to be done once!). The file will be copied and the DR will reset so the new library will be used (might cause strange artifacts on the screen).

Note that the package is still in alpha state, the screen refreshes on the DR are really bad I need to find some good moments to refresh the screen. So the Calc-program is not really usable yet.

Iñigo: thanks again for the feedback.

[Mackx]

Sorry sorry sorry, I keep on messing things up. The install script from the previous zip file does not work correctly. This is an update, see the installation instructions in the previous message use the v5 instead of the v4.

Refreshes are a little better, but not good yet.

[Mackx]

I have solved the refresh problem, but had to rewrite a lot of the drawing code. I now use a pixmap that is copied to the DrawingArea using draw_drawable. This should show others how to use python and get proper refreshes of the screen (might also work for vala).
The calc program is now very basic, you can open a file which will be shown and you can scroll the content using the widgets in top of the screen or, on the DR1000, the buttons at the side of the DR. There are a lot of limitations, columns have a fixed width, font is fixed, no formulas, alignment is fixed to the left, etc etc etc.

For installation see message #20. If you already did the actions described there, you only have to copy the new content attached to this message to your SD card.

[Mackx]

I updated the calc application a little bit so that it is more usefull:
- Cells can be edited
- Files can be stored
- Simple formulas can be used
- Copying/Pasting cells is possible
Examples of formulas are (enter the text below without the quotes):
'=[-2,0]-[-2,-1]' : use relative position for cell
'=[A1] + 10' : absolute cell
'=100/[-1,0]' : +, -, / and * are supported, as are brackets '()'

Note that I still consider it more like a demonstrator then as an application. There is still a lot that can be improved on the usability of the application.

For installation see message #20. If you already did the actions described there, you only have to copy the new content attached to this message to your SD card.
However, to link the .csv-extension to Calc, you need to (re-)run Programs/Install/Install Python Patch, even if you did this before.