SDL  2.0
SDL_androidtouch.c
Go to the documentation of this file.
1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 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 #include "../../SDL_internal.h"
22 
23 #if SDL_VIDEO_DRIVER_ANDROID
24 
25 #include <android/log.h>
26 
27 #include "SDL_hints.h"
28 #include "SDL_events.h"
29 #include "SDL_log.h"
30 #include "SDL_androidtouch.h"
31 #include "../../events/SDL_mouse_c.h"
32 #include "../../events/SDL_touch_c.h"
33 #include "../../core/android/SDL_android.h"
34 
35 #define ACTION_DOWN 0
36 #define ACTION_UP 1
37 #define ACTION_MOVE 2
38 #define ACTION_CANCEL 3
39 #define ACTION_OUTSIDE 4
40 #define ACTION_POINTER_DOWN 5
41 #define ACTION_POINTER_UP 6
42 
43 static void Android_GetWindowCoordinates(float x, float y,
44  int *window_x, int *window_y)
45 {
46  int window_w, window_h;
47 
48  SDL_GetWindowSize(Android_Window, &window_w, &window_h);
49  *window_x = (int)(x * window_w);
50  *window_y = (int)(y * window_h);
51 }
52 
53 static SDL_bool separate_mouse_and_touch = SDL_FALSE;
54 
55 static void SDLCALL
56 SeparateEventsHintWatcher(void *userdata, const char *name,
57  const char *oldValue, const char *newValue)
58 {
59  separate_mouse_and_touch = (newValue && (SDL_strcmp(newValue, "1") == 0));
60 
61  Android_JNI_SetSeparateMouseAndTouch(separate_mouse_and_touch);
62 }
63 
64 void Android_InitTouch(void)
65 {
66  int i;
67  int* ids;
68  const int number = Android_JNI_GetTouchDeviceIds(&ids);
69 
71  SeparateEventsHintWatcher, NULL);
72 
73  if (0 < number) {
74  for (i = 0; i < number; ++i) {
75  SDL_AddTouch((SDL_TouchID) ids[i], ""); /* no error handling */
76  }
77  SDL_free(ids);
78  }
79 }
80 
81 void Android_QuitTouch(void)
82 {
84  SeparateEventsHintWatcher, NULL);
85  separate_mouse_and_touch = SDL_FALSE;
86 }
87 
88 void Android_OnTouch(int touch_device_id_in, int pointer_finger_id_in, int action, float x, float y, float p)
89 {
90  SDL_TouchID touchDeviceId = 0;
91  SDL_FingerID fingerId = 0;
92  int window_x, window_y;
93  static SDL_FingerID pointerFingerID = 0;
94 
95  if (!Android_Window) {
96  return;
97  }
98 
99  touchDeviceId = (SDL_TouchID)touch_device_id_in;
100  if (SDL_AddTouch(touchDeviceId, "") < 0) {
101  SDL_Log("error: can't add touch %s, %d", __FILE__, __LINE__);
102  }
103 
104  fingerId = (SDL_FingerID)pointer_finger_id_in;
105  switch (action) {
106  case ACTION_DOWN:
107  /* Primary pointer down */
108  if (!separate_mouse_and_touch) {
109  Android_GetWindowCoordinates(x, y, &window_x, &window_y);
110  /* send moved event */
111  SDL_SendMouseMotion(Android_Window, SDL_TOUCH_MOUSEID, 0, window_x, window_y);
112  /* send mouse down event */
114  }
115  pointerFingerID = fingerId;
116  case ACTION_POINTER_DOWN:
117  /* Non primary pointer down */
118  SDL_SendTouch(touchDeviceId, fingerId, SDL_TRUE, x, y, p);
119  break;
120 
121  case ACTION_MOVE:
122  if (!pointerFingerID) {
123  if (!separate_mouse_and_touch) {
124  Android_GetWindowCoordinates(x, y, &window_x, &window_y);
125  /* send moved event */
126  SDL_SendMouseMotion(Android_Window, SDL_TOUCH_MOUSEID, 0, window_x, window_y);
127  }
128  }
129  SDL_SendTouchMotion(touchDeviceId, fingerId, x, y, p);
130  break;
131 
132  case ACTION_UP:
133  /* Primary pointer up */
134  if (!separate_mouse_and_touch) {
135  /* send mouse up */
137  }
138  pointerFingerID = (SDL_FingerID) 0;
139  case ACTION_POINTER_UP:
140  /* Non primary pointer up */
141  SDL_SendTouch(touchDeviceId, fingerId, SDL_FALSE, x, y, p);
142  break;
143 
144  default:
145  break;
146  }
147 }
148 
149 #endif /* SDL_VIDEO_DRIVER_ANDROID */
150 
151 /* vi: set ts=4 sw=4 expandtab: */
GLuint * ids
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1574
Sint64 SDL_FingerID
Definition: SDL_touch.h:42
GLfloat GLfloat p
int SDL_SendTouch(SDL_TouchID id, SDL_FingerID fingerid, SDL_bool down, float x, float y, float pressure)
Definition: SDL_touch.c:222
void Android_OnTouch(int touch_device_id_in, int pointer_finger_id_in, int action, float x, float y, float p)
void Android_JNI_SetSeparateMouseAndTouch(SDL_bool new_value)
#define SDL_TOUCH_MOUSEID
Definition: SDL_touch.h:53
void Android_InitTouch(void)
GLuint const GLchar * name
int SDL_SendTouchMotion(SDL_TouchID id, SDL_FingerID fingerid, float x, float y, float pressure)
Definition: SDL_touch.c:284
#define SDL_GetWindowSize
#define SDL_Log
int SDL_SendMouseMotion(SDL_Window *window, SDL_MouseID mouseID, int relative, int x, int y)
Definition: SDL_mouse.c:237
#define SDL_BUTTON_LEFT
Definition: SDL_mouse.h:282
#define SDL_free
SDL_Window * Android_Window
Sint64 SDL_TouchID
Definition: SDL_touch.h:41
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1574
int SDL_AddTouch(SDL_TouchID touchID, const char *name)
Definition: SDL_touch.c:136
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:50
#define NULL
Definition: begin_code.h:164
SDL_bool
Definition: SDL_stdinc.h:139
#define SDL_AddHintCallback
#define SDL_HINT_ANDROID_SEPARATE_MOUSE_AND_TOUCH
A variable to control whether mouse and touch events are to be treated together or separately...
Definition: SDL_hints.h:753
#define SDL_DelHintCallback
int window_h
Definition: testoverlay2.c:144
#define SDL_strcmp
#define SDL_PRESSED
Definition: SDL_events.h:50
int Android_JNI_GetTouchDeviceIds(int **ids)
#define SDL_RELEASED
Definition: SDL_events.h:49
#define SDLCALL
Definition: SDL_internal.h:45
int SDL_SendMouseButton(SDL_Window *window, SDL_MouseID mouseID, Uint8 state, Uint8 button)
Definition: SDL_mouse.c:506
int window_w
Definition: testoverlay2.c:143
void Android_QuitTouch(void)