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Scroll Wheel support?

Monkey Forums/Monkey Beginners/Scroll Wheel support?

Jello Fox(Posted March) [#1]
Where is the code concerning scroll wheels? How do I make use of them?


Soap(Posted March) [#2]
https://www.google.com/search?q=site%3Amonkey-x.com+mouse+wheel


Goodlookinguy(Posted March) [#3]
Look at this: http://www.monkey-x.com/Community/posts.php?topic=7783
My current code is this: https://bitbucket.org/Goodlookinguy/xaddon/src/be666414eb95/mojohacks/?at=default

I haven't updated for GLFW 3 because it uses callbacks and I have to change a handful of things to make it play nice.

Based on this: http://www.glfw.org/docs/3.0/group__input.html#ga6228cdf94d28fbd3a9a1fbb0e5922a8a
typedef void(* GLFWscrollfun)(GLFWwindow *, double, double)


I'd have to do something like this or something. (By the way, I think it was supposed to be GLFW scroll func, but someone forgot the c)

class MojoHacks
{
    static GLFWscrollfun ScrollCallback(GLFWwindow *window, double xOffset, double yOffset)
    {
            // or something
    }

    static GLFWscrollfun s_scrollCallback;
}

GLFWscrollfun MojoHacks::s_scrollCallback = MojoHacks::ScrollCallback;


Edit: Or if I bothered to click that "glfwSetScrollCallback" link, I'd discover this...
http://www.glfw.org/docs/3.0/group__input.html#gacf02eb10504352f16efda4593c3ce60e
GLFWscrollfun glfwSetScrollCallback( GLFWwindow *window, GLFWscrollfun cbfun )


I'd need to know where in the native Mojo code to get the GLFWwindow from, then do something like this...
class MojoHacks
{
    static void BeginMouseWheelUpdate()
    {
        glfwSetScrollCallback(windowFromBBSomething, MojoHacks::ScrollCallback);
    }
    
    static GLFWscrollfun ScrollCallback(GLFWwindow *window, double xOffset, double yOffset)
    {
            // do stuff
    }
}



Nobuyuki(Posted March) [#4]
My code doesn't work on GLFW3 either, sorry. Anyone willing to deal with the event callback stuff and proper externs feel free to do so.


Shinkiro1(Posted March) [#5]
This is my code for glfw3. Unfortunately it's non trivial:

native.cpp
GLFWwindow* getWindow() {
  return BBGlfwGame::GlfwGame()->GetGLFWwindow();
}

class MouseWheelInfo {
public:
  Float x;
  Float y;
  MouseWheelInfo() : x(0.0), y(0.0) {}
};
MouseWheelInfo* wheelInfo;

void scrollwheelCallback(GLFWwindow* window, double xoffset, double yoffset) {
  wheelInfo->x = Float(xoffset);
  wheelInfo->y = Float(yoffset);
}

void NativeInit() {
  GLFWwindow* window = getWindow();
  glfwSetScrollCallback(window, &scrollwheelCallback);
  wheelInfo = new MouseWheelInfo();
}

Float MouseZUnsafe() {
  if (wheelInfo != 0) {
    float z = wheelInfo->y;
    wheelInfo->y = 0.0;
    return z;
  }
  return 0.0;
}


native.monkey
#If TARGET = "glfw"
	Public
	Import "native.cpp"

	Extern
	Function NativeInit:Void() = "NativeInit"
	Function MouseZUnsafe:Float() = "MouseZUnsafe"

        Public
#End


Then in your monkey code import native.monkey and set MouseZUnsafe to a variable each frame!
You then use this variable for your game code.
Calling MouseZUnsafe more than once per frame will mess it up.