[Haskell-cafe] lib for drawing with mouse

[mechvel at scico.botik.ru]

On 2020-03-03 15:44, Brandon Allbery wrote:
> gtk2hs is a dead project, gi is its successor. I don't know if it has
> similar examples.


* Still Gtk2Hs does no seem to provide an interface
   mouse-drawn curve <--> coordinate list,
* I do not see a Manual on  gi or Gtk or Hoodle,
* Detexity does not look like a free tool (?).

So, it looks like I have to use a Python script for the needed 
interface, while
the main program being written in Haskell.

------
Sergei



>> On 2020-03-03 01:45, Branimir Maksimovic wrote:
>>> Gtk?
>>> 
>>> On 3/1/20 8:44 PM, mechvel at scico.botik.ru wrote:
>>>> Please,
>>>> 
>>>> does there exist a tool (library) in Haskell that supports doing
>> the
>>>> following
>>>> with graphics?
>>>> 
>>>> (1) To draw a curve by mouse on a screen and save this picture in
>> a
>>>> file
>>>> (many different curves to be input this way).
>>>> (2) To save in  data.txt  the coordinates of the points of this
>> curve,
>>>> say, 800 pairs of numbers (floating point or rational ...).
>>>> (3) Reversely: to draw a curve on a screen by inputting from such
>> 
>>>> data.txt.
>>>> 
>>>> The main is (1)&(2). Because currently I set a curve by putting
>> many
>>>> times the
>>>> '*' character and `space' to a text file, and this takes long.
>>>> 
>>>> Thanks,
>>>> 
>>>> ------
>>>> Sergei
>>>> 
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> 
> --
> 
> brandon s allbery kf8nh
> allbery.b at gmail.com