Touchscreen Functions

Functions that configure and respond to a touch device. More...

Macros
#define	TOUCH_ROTATION_DATA
	Additional definitions for Touch Handling These macros define the transforms used in remapping the touchscreen inputs on the basis of the GUI nRotation setting. More...
#define	TOUCH_ROTATION_DATA
	Additional definitions for Touch Handling These macros define the transforms used in remapping the touchscreen inputs on the basis of the GUI nRotation setting. More...
#define	TOUCH_ROTATION_SWAPXY(rotation)
#define	TOUCH_ROTATION_SWAPXY(rotation)
#define	TOUCH_ROTATION_FLIPX(rotation)
#define	TOUCH_ROTATION_FLIPX(rotation)
#define	TOUCH_ROTATION_FLIPY(rotation)
#define	TOUCH_ROTATION_FLIPY(rotation)

Functions
bool	gslc_InitTouch (gslc_tsGui *pGui, const char *acDev)
	Initialize the touchscreen device driver. More...
bool	gslc_GetTouch (gslc_tsGui *pGui, int16_t *pnX, int16_t *pnY, uint16_t *pnPress, gslc_teInputRawEvent *peInputEvent, int16_t *pnInputVal)
	Initialize the touchscreen device driver. More...
void	gslc_SetTouchRemapEn (gslc_tsGui *pGui, bool bEn)
	Configure touchscreen remapping. More...
void	gslc_SetTouchRemapCal (gslc_tsGui *pGui, uint16_t nXMin, uint16_t nXMax, uint16_t nYMin, uint16_t nYMax)
	Configure touchscreen calibration remapping values. More...
void	gslc_SetTouchPressCal (gslc_tsGui *pGui, uint16_t nPressMin, uint16_t nPressMax)
	Configure touchscreen calibration pressure values. More...
void	gslc_SetTouchRemapYX (gslc_tsGui *pGui, bool bSwap)
	Configure touchscreen XY swap. More...

Detailed Description

Functions that configure and respond to a touch device.

Macro Definition Documentation

#define TOUCH_ROTATION_DATA

Additional definitions for Touch Handling These macros define the transforms used in remapping the touchscreen inputs on the basis of the GUI nRotation setting.

#define TOUCH_ROTATION_DATA

Additional definitions for Touch Handling These macros define the transforms used in remapping the touchscreen inputs on the basis of the GUI nRotation setting.

#define TOUCH_ROTATION_FLIPX

(

rotation

)

#define TOUCH_ROTATION_FLIPX

(

rotation

)

#define TOUCH_ROTATION_FLIPY

(

rotation

)

#define TOUCH_ROTATION_FLIPY

(

rotation

)

#define TOUCH_ROTATION_SWAPXY

(

rotation

)

#define TOUCH_ROTATION_SWAPXY

(

rotation

)

Function Documentation

bool gslc_GetTouch	(	gslc_tsGui *	pGui,
		int16_t *	pnX,
		int16_t *	pnY,
		uint16_t *	pnPress,
		gslc_teInputRawEvent *	peInputEvent,
		int16_t *	pnInputVal
	)

Initialize the touchscreen device driver.

Parameters

[in]	pGui	Pointer to GUI
[out]	pnX	Ptr to int to contain latest touch X coordinate
[out]	pnY	Ptr to int to contain latest touch Y coordinate
[out]	pnPress	Ptr to int to contain latest touch pressure value
[out]	peInputEvent	Indication of event type
[out]	pnInputVal	Additional data for event type

Returns

true if touch event, false otherwise

bool gslc_InitTouch	(	gslc_tsGui *	pGui,
		const char *	acDev
	)

Initialize the touchscreen device driver.

Parameters

[in]	pGui	Pointer to GUI
[in]	acDev	Device path to touchscreen (or "" if not applicable)) eg. "/dev/input/touchscreen"

Returns

true if successful

void gslc_SetTouchPressCal	(	gslc_tsGui *	pGui,
		uint16_t	nPressMin,
		uint16_t	nPressMax
	)

Configure touchscreen calibration pressure values.

• Only used if calibration remapping has been enabled

Parameters

[in]	pGui	Pointer to GUI
[in]	nPressMin	Resistive touchscreen pressure min value
[in]	nPressMax	Resistive touchscreen pressure max value

Returns

none

void gslc_SetTouchRemapCal	(	gslc_tsGui *	pGui,
		uint16_t	nXMin,
		uint16_t	nXMax,
		uint16_t	nYMin,
		uint16_t	nYMax
	)

Configure touchscreen calibration remapping values.

• Only used if calibration remapping has been enabled

Parameters

[in]	pGui	Pointer to GUI
[in]	nXMin	Resistive touchscreen X_MIN calibration value
[in]	nXMax	Resistive touchscreen X_MAX calibration value
[in]	nYMin	Resistive touchscreen Y_MIN calibration value
[in]	nYMax	Resistive touchscreen Y_MAX calibration value

Returns

none

void gslc_SetTouchRemapEn	(	gslc_tsGui *	pGui,
		bool	bEn
	)

Configure touchscreen remapping.

Parameters

[in]	pGui	Pointer to GUI
[in]	bEn	Enable touchscreen remapping?

Returns

none

void gslc_SetTouchRemapYX	(	gslc_tsGui *	pGui,
		bool	bSwap
	)

Configure touchscreen XY swap.

Parameters

[in]	pGui	Pointer to GUI
[in]	bSwap	Enable touchscreen XY swap

Returns

none