GritsCallback

GritsCallback — Custom callback objects

Synopsis

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

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

struct GritsCallback

struct GritsCallback;

struct GritsCallbackClass

struct GritsCallbackClass {
	GritsObjectClass parent_class;
};

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

			Grits Reference Manual
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