Re: [E-devel] ploting data

[Peter W. <pet...@we...>]

no...@fr... schrieb:
> Hi guys
>
> I began to reflect on the problem of drawing a table of values following
> the ideas given by Vincent and Gustavo. I wrote 
> something which is still archaic (I warned you, in terms of programming
> I have the age of an infant)
>
> let me explain the procedure:
>
> the app window is W x H pixels.
>
> The ploting area is of W-XG x H-YG, begining at XG,YG.
>
> Creates 2 evas_images (W-XG x H-YG):
> The first supports the points (x_i, y_i), the axes oX, oY, and the graduations
> the second supports the gride
>
> we need to transform the set of values due to the orientation of axes
> and the origin of coordinates.
>
> In this transformation we only use 75% of the ploting area.
>
> Usage of the programme :
>
> ./prg datafile [pt] [motif]
>
> if pt null, then dont plot lines between points
> motif = c, p, l, s (cross, plus, losange, stars)
>
> I need lotof help:
>   
I don't know how you drawing the points or the lines, but I started to 
write a little plotting library, some months ago, unfortunately I didn't 
found the time to work on it futher, but I still plan to do it. Hence it 
lacks on many places, in fact it isn't a library at all atm. It's using 
cario as back-end, so you can plot in any cairo surface, also into a buffer.

http://code.google.com/p/complot/source/checkout
> I create with the aide of embed some ewl_butons (open data, save, help, zoom).
>
> How can I attache a callback which reads a datafile (pointer to datafile).
>   
You do not need a callback to read a data file. Use fread or fgets.
> I can not find how to handle from a EVAS, other window (ewl or evas).
>   

Sorry, what do you want to handle?
> thank you to anyone who can give me an example.
>
> Last question Can'I publish the programme here for discussion?
>   

If it is short yes, of course. If it is already longer, you can upload 
it somewhere else, and only post a link to it.