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Updated touch API

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* Normalized touch coordinates as floats in the 0...1 range
* Removed unused touchpad concepts from the API
* Added API functions to get active touch devices and current finger state
This commit is contained in:
Sam Lantinga 2013-03-03 01:01:33 -08:00
parent 71ea3033fa
commit bb0752e573
15 changed files with 356 additions and 917 deletions
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56
include/SDL_events.h
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@ -105,8 +105,6 @@ typedef enum
SDL_FINGERDOWN = 0x700,
SDL_FINGERUP,
SDL_FINGERMOTION,
SDL_TOUCHBUTTONDOWN,
SDL_TOUCHBUTTONUP,
/* Gesture events */
SDL_DOLLARGESTURE = 0x800,
@ -367,43 +365,22 @@ typedef struct SDL_ControllerDeviceEvent
/**
* \brief Touch finger motion/finger event structure (event.tfinger.*)
* \brief Touch finger event structure (event.tfinger.*)
*/
typedef struct SDL_TouchFingerEvent
{
Uint32 type; /**< ::SDL_FINGERMOTION or ::SDL_FINGERDOWN or ::SDL_FINGERUP */
Uint32 timestamp;
Uint32 windowID; /**< The window with mouse focus, if any */
SDL_TouchID touchId; /**< The touch device id */
SDL_FingerID fingerId;
Uint8 state; /**< The current button state */
Uint8 padding1;
Uint8 padding2;
Uint8 padding3;
Uint16 x;
Uint16 y;
Sint16 dx;
Sint16 dy;
Uint16 pressure;
float x; /**< Normalized in the range 0...1 */
float y; /**< Normalized in the range 0...1 */
float dx; /**< Normalized in the range 0...1 */
float dy; /**< Normalized in the range 0...1 */
float pressure; /**< Normalized in the range 0...1 */
} SDL_TouchFingerEvent;
/**
* \brief Touch finger motion/finger event structure (event.tbutton.*)
*/
typedef struct SDL_TouchButtonEvent
{
Uint32 type; /**< ::SDL_TOUCHBUTTONUP OR SDL_TOUCHBUTTONDOWN */
Uint32 timestamp;
Uint32 windowID; /**< The window with mouse focus, if any */
SDL_TouchID touchId; /**< The touch device index */
Uint8 state; /**< The current button state */
Uint8 button; /**< The button changing state */
Uint8 padding1;
Uint8 padding2;
} SDL_TouchButtonEvent;
/**
* \brief Multiple Finger Gesture Event (event.mgesture.*)
*/
@ -411,31 +388,27 @@ typedef struct SDL_MultiGestureEvent
{
Uint32 type; /**< ::SDL_MULTIGESTURE */
Uint32 timestamp;
Uint32 windowID; /**< The window with mouse focus, if any */
SDL_TouchID touchId; /**< The touch device index */
SDL_TouchID touchId; /**< The touch device index */
float dTheta;
float dDist;
float x; /* currently 0...1. Change to screen coords? */
float x;
float y;
Uint16 numFingers;
Uint16 padding;
} SDL_MultiGestureEvent;
/* (event.dgesture.*) */
typedef struct SDL_DollarGestureEvent
{
Uint32 type; /**< ::SDL_DOLLARGESTURE */
Uint32 timestamp;
Uint32 windowID; /**< The window with mouse focus, if any */
SDL_TouchID touchId; /**< The touch device index */
SDL_TouchID touchId; /**< The touch device id */
SDL_GestureID gestureId;
Uint32 numFingers;
float error;
/*
//TODO: Enable to give location?
float x; //currently 0...1. Change to screen coords?
float y;
*/
float x; /**< Normalized center of gesture */
float y; /**< Normalized center of gesture */
} SDL_DollarGestureEvent;
@ -518,9 +491,8 @@ typedef union SDL_Event
SDL_UserEvent user; /**< Custom event data */
SDL_SysWMEvent syswm; /**< System dependent window event data */
SDL_TouchFingerEvent tfinger; /**< Touch finger event data */
SDL_TouchButtonEvent tbutton; /**< Touch button event data */
SDL_MultiGestureEvent mgesture; /**< Multi Finger Gesture data */
SDL_DollarGestureEvent dgesture; /**< Multi Finger Gesture data */
SDL_MultiGestureEvent mgesture; /**< Gesture event data */
SDL_DollarGestureEvent dgesture; /**< Gesture event data */
SDL_DropEvent drop; /**< Drag and drop event data */
/* This is necessary for ABI compatibility between Visual C++ and GCC