RE: [wxhaskell-users] Bug on mouse events

[Daan L. <daa...@xs...>]

Hi Jose,

> First of all, please pardon my clumsy english. I am Jose 
> David Fernandez, a 
> computer studies student at the university of Malaga, Spain. 
> I am developing a 
> yahu-liked GUI on top of WXH, like your WX, as a project for 
> finish my studies. 

Maybe you should consider working on WX instead of building a
new interface? WX is already very much structured like Yahu -- have
you seen the attributes and event handling? 

wxHaskell is very much a community project and it would be great
if you can design/invent good abstractions and extensions for the
WX library. Anyway, nice that you can use wxWindows for your final
project :-)

> Your mouse event handlers receive a MouseEvent data as 
> argument. This data can 
> have the constructors MouseLeftDrag, MouseRightDrag, 
> MouseMiddleDrag, and 
> others. You get the button that is dragging by consulting the 
> mouseEventGetButton method. But (and here is the bug) this 
> method returns -1 on 
> a wxEVT_MOTION event (see wxwindows docs), and the 
> mouseEventDragging method 
> only returns TRUE on wxEVT_MOTION, so your data event 
> converter always yields 
> MouseLeftDrag (the default choice), never the other two MouseXXXDrag.

Ok, this is fixed in the latest CVS. Thanks for giving this detailed
report!

(note: the whole left/right/middle drag constructors are somewhat wrong.
I guess it would be better to have MouseDown/Up/DClick/Motion
constructors
together with the currently pressed buttons (just as modifiers).
However,
I want to stick closely to the wxWindows interface ...)
 
> I would want to comment another thing. Since I am working 
> with the WXH package, 
> I need the sources for consulting. You have packed all them 
> except wxcClasses 
> and wxcDefs. I am working now with older ones, and I think I 
> can get newer ones
> from the CVS, but it would be useful that you put them in the 
> source release in  your download page.

You can generate these sources yourself! Just type "make" :-)
(You could also take a shortcut:
> make wxd
> make wxh/src/Graphics/UI/WXH/WxcClasses.hs
> make wxh/src/Graphics/UI/WXH/WxcClassTypes.hs
> make wxh/src/Graphics/UI/WXH/WxcDefs.hs
)

Hope this helps,
 Daan.

> 
> Thank you for this wonderful port of wxwindows to haskell and 
> happy return from 
> holyday.
> 
> ---------------------------------------------
> Este mensaje lo ha enviado un Alumno de la Universidad de Malaga.
> http://www.alumnos.uma.es/
> 
> 
> 
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