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Added SDL_GetDisplayOrientation() to get the display orientation, and added a new event SDL_DISPLAYEVENT to notify the application when the orientation changes.

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Documented the values returned by the accelerometer and gyroscope sensors
This commit is contained in:
Sam Lantinga
2018-08-22 21:48:28 -07:00
parent f1bc1c1274
commit f225af0c1e
14 changed files with 290 additions and 25 deletions
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61
src/events/SDL_displayevents.c Normal file
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@@ -0,0 +1,61 @@
/*
Simple DirectMedia Layer
Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../SDL_internal.h"
/* Display event handling code for SDL */
#include "SDL_events.h"
#include "SDL_events_c.h"
#include "../video/SDL_sysvideo.h"
int
SDL_SendDisplayEvent(SDL_VideoDisplay *display, Uint8 displayevent, int data1)
{
int posted;
if (!display) {
return 0;
}
switch (displayevent) {
case SDL_DISPLAYEVENT_ORIENTATION:
if (data1 == SDL_ORIENTATION_UNKNOWN || data1 == display->orientation) {
return 0;
}
display->orientation = (SDL_DisplayOrientation)data1;
break;
}
/* Post the event, if desired */
posted = 0;
if (SDL_GetEventState(SDL_DISPLAYEVENT) == SDL_ENABLE) {
SDL_Event event;
event.type = SDL_DISPLAYEVENT;
event.display.event = displayevent;
event.display.display = SDL_GetIndexOfDisplay(display);
event.display.data1 = data1;
posted = (SDL_PushEvent(&event) > 0);
}
return (posted);
}
/* vi: set ts=4 sw=4 expandtab: */

32
src/events/SDL_displayevents_c.h Normal file
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../SDL_internal.h"
#ifndef SDL_displayevents_c_h_
#define SDL_displayevents_c_h_
typedef struct SDL_VideoDisplay SDL_VideoDisplay;
extern int SDL_SendDisplayEvent(SDL_VideoDisplay *display, Uint8 displayevent, int data1);
#endif /* SDL_displayevents_c_h_ */
/* vi: set ts=4 sw=4 expandtab: */

1
src/events/SDL_events_c.h
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@@ -24,6 +24,7 @@
#include "SDL_events.h"
#include "SDL_thread.h"
#include "SDL_clipboardevents_c.h"
#include "SDL_displayevents_c.h"
#include "SDL_dropevents_c.h"
#include "SDL_gesture_c.h"
#include "SDL_keyboard_c.h"