SDL
2.0
SDL_touch.h
Go to the documentation of this file.
1
/*
2
Simple DirectMedia Layer
3
Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
4
5
This software is provided 'as-is', without any express or implied
6
warranty. In no event will the authors be held liable for any damages
7
arising from the use of this software.
8
9
Permission is granted to anyone to use this software for any purpose,
10
including commercial applications, and to alter it and redistribute it
11
freely, subject to the following restrictions:
12
13
1. The origin of this software must not be misrepresented; you must not
14
claim that you wrote the original software. If you use this software
15
in a product, an acknowledgment in the product documentation would be
16
appreciated but is not required.
17
2. Altered source versions must be plainly marked as such, and must not be
18
misrepresented as being the original software.
19
3. This notice may not be removed or altered from any source distribution.
20
*/
21
22
/**
23
* \file SDL_touch.h
24
*
25
* Include file for SDL touch event handling.
26
*/
27
28
#ifndef SDL_touch_h_
29
#define SDL_touch_h_
30
31
#include "
SDL_stdinc.h
"
32
#include "
SDL_error.h
"
33
#include "
SDL_video.h
"
34
35
#include "
begin_code.h
"
36
/* Set up for C function definitions, even when using C++ */
37
#ifdef __cplusplus
38
extern
"C"
{
39
#endif
40
41
typedef
Sint64
SDL_TouchID
;
42
typedef
Sint64
SDL_FingerID
;
43
44
typedef
enum
45
{
46
SDL_TOUCH_DEVICE_INVALID
= -1,
47
SDL_TOUCH_DEVICE_DIRECT
,
/* touch screen with window-relative coordinates */
48
SDL_TOUCH_DEVICE_INDIRECT_ABSOLUTE
,
/* trackpad with absolute device coordinates */
49
SDL_TOUCH_DEVICE_INDIRECT_RELATIVE
/* trackpad with screen cursor-relative coordinates */
50
}
SDL_TouchDeviceType
;
51
52
typedef
struct
SDL_Finger
53
{
54
SDL_FingerID
id
;
55
float
x
;
56
float
y
;
57
float
pressure
;
58
}
SDL_Finger
;
59
60
/* Used as the device ID for mouse events simulated with touch input */
61
#define SDL_TOUCH_MOUSEID ((Uint32)-1)
62
63
/* Used as the SDL_TouchID for touch events simulated with mouse input */
64
#define SDL_MOUSE_TOUCHID ((Sint64)-1)
65
66
67
/* Function prototypes */
68
69
/**
70
* \brief Get the number of registered touch devices.
71
*/
72
extern
DECLSPEC
int
SDLCALL
SDL_GetNumTouchDevices
(
void
);
73
74
/**
75
* \brief Get the touch ID with the given index, or 0 if the index is invalid.
76
*/
77
extern
DECLSPEC
SDL_TouchID
SDLCALL
SDL_GetTouchDevice
(
int
index
);
78
79
/**
80
* \brief Get the type of the given touch device.
81
*/
82
extern
DECLSPEC
SDL_TouchDeviceType
SDLCALL
SDL_GetTouchDeviceType
(
SDL_TouchID
touchID);
83
84
/**
85
* \brief Get the number of active fingers for a given touch device.
86
*/
87
extern
DECLSPEC
int
SDLCALL
SDL_GetNumTouchFingers
(
SDL_TouchID
touchID);
88
89
/**
90
* \brief Get the finger object of the given touch, with the given index.
91
*/
92
extern
DECLSPEC
SDL_Finger
*
SDLCALL
SDL_GetTouchFinger
(
SDL_TouchID
touchID,
int
index
);
93
94
/* Ends C function definitions when using C++ */
95
#ifdef __cplusplus
96
}
97
#endif
98
#include "
close_code.h
"
99
100
#endif
/* SDL_touch_h_ */
101
102
/* vi: set ts=4 sw=4 expandtab: */
SDL_TOUCH_DEVICE_DIRECT
Definition:
SDL_touch.h:47
DECLSPEC
#define DECLSPEC
Definition:
SDL_internal.h:48
SDL_TouchID
Sint64 SDL_TouchID
Definition:
SDL_touch.h:41
SDL_TOUCH_DEVICE_INVALID
Definition:
SDL_touch.h:46
SDL_error.h
SDL_FingerID
Sint64 SDL_FingerID
Definition:
SDL_touch.h:42
SDLCALL
#define SDLCALL
Definition:
SDL_internal.h:49
SDL_TOUCH_DEVICE_INDIRECT_RELATIVE
Definition:
SDL_touch.h:49
SDL_GetTouchDevice
SDL_TouchID SDL_GetTouchDevice(int index)
Get the touch ID with the given index, or 0 if the index is invalid.
Definition:
SDL_touch.c:58
index
GLuint index
Definition:
SDL_opengl_glext.h:660
close_code.h
begin_code.h
SDL_Finger
Definition:
SDL_touch.h:52
SDL_TouchDeviceType
SDL_TouchDeviceType
Definition:
SDL_touch.h:44
SDL_GetNumTouchFingers
int SDL_GetNumTouchFingers(SDL_TouchID touchID)
Get the number of active fingers for a given touch device.
Definition:
SDL_touch.c:131
SDL_TOUCH_DEVICE_INDIRECT_ABSOLUTE
Definition:
SDL_touch.h:48
SDL_GetNumTouchDevices
int SDL_GetNumTouchDevices(void)
Get the number of registered touch devices.
Definition:
SDL_touch.c:52
SDL_GetTouchDeviceType
SDL_TouchDeviceType SDL_GetTouchDeviceType(SDL_TouchID touchID)
Get the type of the given touch device.
Definition:
SDL_touch.c:99
SDL_Finger::y
float y
Definition:
SDL_touch.h:56
SDL_stdinc.h
SDL_Finger::pressure
float pressure
Definition:
SDL_touch.h:57
SDL_GetTouchFinger
SDL_Finger * SDL_GetTouchFinger(SDL_TouchID touchID, int index)
Get the finger object of the given touch, with the given index.
Definition:
SDL_touch.c:141
SDL_Finger::id
SDL_FingerID id
Definition:
SDL_touch.h:54
SDL_video.h
SDL_Finger::x
float x
Definition:
SDL_touch.h:55
Sint64
int64_t Sint64
Definition:
SDL_stdinc.h:210
include
SDL_touch.h
Generated by
1.8.16