Mouse wheel management in TextBox

[gbaudic]

When playing with the included example sdlwidgets, using the scroll wheel has no effect.

[gbaudic]

The scroll wheel logic is in the ScrollArea class and is implemented. I will need to check if the logic is broken or if it is only a focus problem (the scroll area may need to have focus to receive mouse events).

[damianday]

guisan/src/sdl/sdlinput.cpp

Line 179 in 63d53b2

mouseInput.setType(MouseInput::WHEEL_MOVED_DOWN);

Forgot to push the event before breaking, looks like mouse X and Y need setting as well.

[gbaudic]

Thanks for the tip! I tried this fix on my fork and it does not seem sufficient: for the moment, I only manage to see some response in the dropdown widget.