Messages

1

Window / Re: Mouse wheel moved issue

« on: June 17, 2015, 08:31:22 pm »

Is it inside the event loop?
PS: if you're using SFML 2.3, use the MouseWheelScrolled event instead.

It is not inside the loop, thanks, such a newbie error !

When I get the if() off and just type :

std::cout << "wheel movement: " << event.mouseWheel.delta << "  " << event.mouseWheel.x << "  " << event.mouseWheel.y << std::endl;

You MUST check event.type before accessing any other member and then only access members that are actually valid for that type.

See also: A Guide to Undefined Behavior in C and C++

You are absolutely right, thank you

2

Window / Mouse wheel moved issue

« on: June 17, 2015, 07:55:43 pm »

Hello,
I have a problem with the MouseWheelMoved event but not only.
When I do this:

if(event.type == Event::MouseWheelMoved){
            std::cout << "wheel movement: " << event.mouseWheel.delta << "  " << event.mouseWheel.x << "  " << event.mouseWheel.y << std::endl;
        }

nothing happens when I turn the wheel (even very fast), so it does not enter the if().
When I get the if() off and just type :

std::cout << "wheel movement: " << event.mouseWheel.delta << "  " << event.mouseWheel.x << "  " << event.mouseWheel.y << std::endl;

I get several different data depending on the action. For the example, take x=125 and y=112. When just moving the mouse, I have the X value inside delta, the Y value inside the X and some very long number (looks like an adress) in the Y : 125  112  2002418353

If I click, I get the click value (0, 1 or 2 depending on the button) inside the delta and X and Y are normal : 1  125  112

Finally, when I rotate the wheel I have 0 in delta, some positive adress when up and negative when down in X, and X in Y : 0  106535816  125 when up and 0  -1082130432  125 when down.

Bonus : When offscreen : -21, then 0 and then an adress : -21  0  12089408.

Did I make a mistake inside the code? Is that normal? How should I access the good wheel numering?