drag.c File Reference

#include "drag.h"
#include "math.h"
#include "stroke.h"
#include "utils.h"

Go to the source code of this file.

Functions
void	init_drag ()
	Initialize drag data structures. More...
void	recognize_drag (const touch_event_t *event)
	Recognize drag gesture. More...
const drag_t *	get_drag ()
	Access drag data array of size MAX_TOUCHES. More...
int	set_on_drag (void(*listener)(const drag_t *))
	Subscribe listener to drag gesture updates. More...

Variables
drag_t	drag_d [MAX_TOUCHES]
void(*	on_drag )(const drag_t *)=0

Function Documentation

get_drag()

const drag_t* get_drag

(

)

Access drag data array of size MAX_TOUCHES.

Returns

Address of first element of drag data array of size MAX_TOUCHES

Definition at line 30 of file drag.c.

init_drag()

void init_drag

(

)

Initialize drag data structures.

Definition at line 10 of file drag.c.

recognize_drag()

void recognize_drag

(

const touch_event_t *

event

)

Recognize drag gesture.

Parameters

event

touch event to recognize

Definition at line 23 of file drag.c.

set_on_drag()

int set_on_drag

(

void(*)(const drag_t *)

listener

)

Subscribe listener to drag gesture updates.

Parameters

listener

accepts a const drag_t*

Returns

0 if first listener, 1 if replacing existing listener

Definition at line 34 of file drag.c.

Variable Documentation

drag_d

drag_t drag_d[MAX_TOUCHES]

Definition at line 7 of file drag.c.

on_drag

void(* on_drag) (const drag_t *)=0

(

const drag_t *

)

Definition at line 8 of file drag.c.