| Grits Reference Manual | ||||
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| Top | Description | Object Hierarchy | ||||
struct GritsCallback; struct GritsCallbackClass; void (*GritsCallbackFunc) (GritsCallback *callback,GritsOpenGL *opengl,gpointer user_data); GritsCallback * grits_callback_new (GritsCallbackFunc draw_cb,gpointer user_data);
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.
void (*GritsCallbackFunc) (GritsCallback *callback,GritsOpenGL *opengl,gpointer user_data);
A function to be called when the callback object is being rendered
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the callback object to be drawn |
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the user data associated with the callback |
GritsCallback * grits_callback_new (GritsCallbackFunc draw_cb,gpointer user_data);
Create a GritsCallback object with an associated function and user data.
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user data to pass to the drawing function |
Returns : |
the new GritsCallback |