[SDL] Making a GUI system in SDL

[Andre Krause]

you can avoid any form of callback troubles of you go the route of

"immediate mode gui" - IMGUI

http://sol.gfxile.net/imgui/

https://mollyrocket.com/forums/viewforum.php?f=10

on molly rocket, there is also a video tutorial.

imguis are the way to go if you want a quick solution and if you want to save a 
lot of time.

but if you are hardcore and have lots of time to waste, just go on and design 
"yet another gui system".

if not, you might also rather use guichan, crazy eddies gui , agar , fltk, ... 
just browse this mailing list a bit.

L-28C wrote:
> Hello everyone!
> 
> My system works like this:
> 
> Control (base class)
>   -- GUI (control container)
>   -- Button (sample control)
>   -- ...other controls
> 
> And the event system works like this (in this case we'll use mouse 
> clicks): the main application calls the "OnClick()" method in the GUI 
> class with the mouse pointer's position as a parameter. The GUI class 
> then sees which control was clicked (based on the mouse's position), and 
> calls the "OnClick()" method in that control (in this case we'll use a 
> button). But here's the problem; how can this control (button) class let 
> the main application know that it was clicked?
> 
> I tried to place a function pointer called "m_pfnOnClickEvent" and let 
> the main application set a function to it when it creates the button... 
> but C++ doesn't let you put member methods onto function pointers, and 
> my program is 100% object-oriented.
> 
> Any ideas? Thanks!
> 
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