GritsCallback

GritsCallback — Custom callback objects

Synopsis

struct              GritsCallback;
struct              GritsCallbackClass;
void                (*GritsCallbackFunc)                (GritsCallback *callback,
                                                         GritsOpenGL *opengl,
                                                         gpointer user_data);
GritsCallback *     grits_callback_new                  (GritsCallbackFunc draw_cb,
                                                         gpointer user_data);

Object Hierarchy

  GObject
   +----GritsObject
         +----GritsCallback

Description

GritsCallback objects are used for custom drawing functions. A common example of this would be to render something which does not easily fit into a normal object. For instance, a Heads-Up-Display overlay.

Callbacks are an alternate to extending GritsObject with a new class and should be used when only once instance of the object will be needed.

Details

struct GritsCallback

struct GritsCallback;


struct GritsCallbackClass

struct GritsCallbackClass {
	GritsObjectClass parent_class;
};


GritsCallbackFunc ()

void                (*GritsCallbackFunc)                (GritsCallback *callback,
                                                         GritsOpenGL *opengl,
                                                         gpointer user_data);

A function to be called when the callback object is being rendered

callback :

the callback object to be drawn

user_data :

the user data associated with the callback

grits_callback_new ()

GritsCallback *     grits_callback_new                  (GritsCallbackFunc draw_cb,
                                                         gpointer user_data);

Create a GritsCallback object with an associated function and user data.

user_data :

user data to pass to the drawing function

Returns :

the new GritsCallback