zoom.c File Reference

#include "zoom.h"
#include "math.h"
#include "multidrag.h"

Go to the source code of this file.

Functions
void	init_zoom ()
	Initialize zoom data structures. More...
void	recognize_zoom (const touch_event_t *event)
	Recognize zoom gesture. This gesture locks the number of fingers once any finger starts moving. More...
const zoom_t *	get_zoom ()
	Access array of zoom_t of size MAX_TOUCHES. More...
int	set_on_zoom (void(*listener)(const zoom_t *))
	Subscribe listener to zoom gesture updates. More...

Variables
zoom_t	zoom_d [MAX_TOUCHES]
void(*	on_zoom )(const zoom_t *)=0

Function Documentation

get_zoom()

const zoom_t* get_zoom

(

)

Access array of zoom_t of size MAX_TOUCHES.

Returns

Pointer to first element of array of zoom_t of size MAX_TOUCHES

Definition at line 54 of file zoom.c.

init_zoom()

void init_zoom

(

)

Initialize zoom data structures.

Definition at line 9 of file zoom.c.

recognize_zoom()

void recognize_zoom

(

const touch_event_t *

event

)

Recognize zoom gesture. This gesture locks the number of fingers once any finger starts moving.

Parameters

event

touch event to recognize

Definition at line 19 of file zoom.c.

set_on_zoom()

int set_on_zoom

(

void(*)(const zoom_t *)

listener

)

Subscribe listener to zoom gesture updates.

Parameters

listener

accepts a const zoom_t*

Returns

0 if first listener, 1 if replacing existing listener

Definition at line 58 of file zoom.c.

Variable Documentation

on_zoom

void(* on_zoom) (const zoom_t *)=0

(

const zoom_t *

)

Definition at line 7 of file zoom.c.

zoom_d

zoom_t zoom_d[MAX_TOUCHES]

Definition at line 6 of file zoom.c.