arsa  2.7
SDL_touch.h
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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 
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 
43 
44 typedef enum
45 {
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 */
51 
52 typedef struct SDL_Finger
53 {
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 
72 extern DECLSPEC int SDLCALL SDL_GetNumTouchDevices(void);
73 
78 
83 
88 
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: */
Sint64 SDL_TouchID
Definition: SDL_touch.h:41
Sint64 SDL_FingerID
Definition: SDL_touch.h:42
DECLSPEC SDL_TouchDeviceType SDLCALL SDL_GetTouchDeviceType(SDL_TouchID touchID)
Get the type of the given touch device.
#define DECLSPEC
Definition: begin_code.h:74
DECLSPEC SDL_Finger *SDLCALL SDL_GetTouchFinger(SDL_TouchID touchID, int index)
Get the finger object of the given touch, with the given index.
#define SDLCALL
Definition: begin_code.h:89
SDL_TouchDeviceType
Definition: SDL_touch.h:44
struct SDL_Finger SDL_Finger
float y
Definition: SDL_touch.h:56
GLuint index
DECLSPEC int SDLCALL SDL_GetNumTouchFingers(SDL_TouchID touchID)
Get the number of active fingers for a given touch device.
DECLSPEC SDL_TouchID SDLCALL SDL_GetTouchDevice(int index)
Get the touch ID with the given index, or 0 if the index is invalid.
int64_t Sint64
Definition: SDL_stdinc.h:210
DECLSPEC int SDLCALL SDL_GetNumTouchDevices(void)
Get the number of registered touch devices.
SDL_FingerID id
Definition: SDL_touch.h:54
float pressure
Definition: SDL_touch.h:57
float x
Definition: SDL_touch.h:55