wxhaskell-users

[wxhaskell-users] Bug on mouse events

[<72...@in...>]

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. 
I know this is not the moment for comment anything, since certainly everybody 
are on holydays, but I want to report a bug before I forget to do it.

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.

I have been looking for a solution. I think you should use the methods 
XXXIsDown, what is I am going to do in my library. I hope I have been useful.

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.

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/

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/
> 
> 
> 
> 
> -------------------------------------------------------
> This SF.Net email sponsored by: Free pre-built ASP.NET sites including
> Data Reports, E-commerce, Portals, and Forums are available now.
> Download today and enter to win an XBOX or Visual Studio .NET.
> http://aspnet.click-url.com/go/psa00100003ave/direct;at.aspnet
> _072303_01/01
> _______________________________________________
> wxhaskell-users mailing list
> wxh...@li...
> https://lists.sourceforge.net/lists/listinfo/wxhaskell-users
> 
>