|
|
| Line 253: |
Line 253: |
| | |- | | |- |
| | | <code>Info:LongWord;</code> | | | <code>Info:LongWord;</code> |
| − | | style="width: 50%;"| | + | | Bitmap of touch info values (eg TOUCH_FINGER) |
| | |- | | |- |
| | | <code>PointID:Word;</code> | | | <code>PointID:Word;</code> |
| − | | | + | | The touch point ID value for this touch (First ID is 1) |
| | |- | | |- |
| | | <code>PositionX:SmallInt;</code> | | | <code>PositionX:SmallInt;</code> |
| − | | | + | | The X position of this touch point |
| | |- | | |- |
| | | <code>PositionY:SmallInt;</code> | | | <code>PositionY:SmallInt;</code> |
| − | | | + | | The Y position of this touch point |
| | |- | | |- |
| − | | <code>PositionZ:SmallInt;</code> | + | | <code>The Z position of this touch point (If applicable)</code> |
| | | | | | |
| | + | |- |
| | + | | <code>TouchWidth:Word;</code> |
| | + | | The Width of this touch point (If applicable) |
| | + | |- |
| | + | | <code>TouchHeight:Word;</code> |
| | + | | The Height of this touch point (If applicable) |
| | + | |- |
| | + | | <code>Parameter:Pointer;</code> |
| | + | | The parameter for the event callback (If applicable) |
| | |- | | |- |
| | |} | | |} |
| Line 316: |
Line 325: |
| | |- | | |- |
| | | <code>MaxX:LongWord;</code> | | | <code>MaxX:LongWord;</code> |
| − | | Maximum (absolute) X value for the touch device | + | | Maximum (absolute) X position for the touch device |
| | |- | | |- |
| | | <code>MaxY:LongWord;</code> | | | <code>MaxY:LongWord;</code> |
| − | | Maximum (absolute) Y value for the touch device | + | | Maximum (absolute) Y position for the touch device |
| | |- | | |- |
| | | <code>MaxZ:LongWord;</code> | | | <code>MaxZ:LongWord;</code> |
| − | | Maximum (absolute) Z value for the touch device | + | | Maximum (absolute) Z position for the touch device (If applicable) |
| | + | |- |
| | + | | <code>MaxWidth:LongWord;</code> |
| | + | | Maximum touch width value for the touch device (If applicable) |
| | + | |- |
| | + | | <code>MaxHeight:LongWord;</code> |
| | + | | Maximum touch height value for the touch device (If applicable) |
| | |- | | |- |
| | | <code>MaxPoints:LongWord;</code> | | | <code>MaxPoints:LongWord;</code> |
| Line 329: |
Line 344: |
| | |} | | |} |
| | </div></div> | | </div></div> |
| | + | |
| | + | '''Touch event callback''' |
| | + | |
| | + | {| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;" |
| | + | |- |
| | + | | <code>TTouchEvent = function(Touch:PTouchDevice; Data:PTouchData):LongWord;</code> |
| | + | | style="width: 40%;"| |
| | + | |- |
| | + | |} |
| | | | |
| | '''Touch enumeration callback''' | | '''Touch enumeration callback''' |
| Line 415: |
Line 439: |
| | {| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;" | | {| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;" |
| | |- | | |- |
| − | | <code>TTouchDeviceControl = function(Touch:PTouchDevice; Request:Integer; Argument1:LongWord; var Argument2:LongWord):LongWord;</code> | + | | <code>TTouchDeviceControl = function(Touch:PTouchDevice; Request:Integer; Argument1:PtrUInt; var Argument2:PtrUInt):LongWord;</code> |
| | | style="width: 40%;"| | | | style="width: 40%;"| |
| | |- | | |- |
| Line 482: |
Line 506: |
| | | <code>Lock:TMutexHandle;</code> | | | <code>Lock:TMutexHandle;</code> |
| | | Device lock | | | Device lock |
| | + | |- |
| | + | | <code>Event:TTouchEvent;</code> |
| | + | | Event callback function (If assigned) |
| | + | |- |
| | + | | <code>Parameter:Pointer;</code> |
| | + | | Parameter for the event callback (or nil) |
| | |- | | |- |
| | | <code>Buffer:TTouchBuffer;</code> | | | <code>Buffer:TTouchBuffer;</code> |
Revision as of 06:12, 16 November 2022
Return to Unit Reference
Description
Ultibo Touch Interface unit
Constants
[Expand]
Touch specific constants TOUCH_*
TOUCH_NAME_PREFIX = 'Touch';
|
Name prefix for Touch Devices
|
[Expand]
Touch device type TOUCH_TYPE_*
TOUCH_TYPE_NONE = 0;
|
|
TOUCH_TYPE_RESISTIVE = 1;
|
|
TOUCH_TYPE_CAPACITIVE = 2;
|
|
|
|
TOUCH_TYPE_MAX = 2;
|
|
[Expand]
Touch device state TOUCH_STATE_*
TOUCH_STATE_DISABLED = 0;
|
|
TOUCH_STATE_ENABLED = 1;
|
|
|
|
TOUCH_STATE_MAX = 1;
|
|
[Expand]
Touch device flag TOUCH_FLAG_*
TOUCH_FLAG_NONE = $00000000;
|
|
TOUCH_FLAG_NON_BLOCK = $00000001;
|
If set device reads are non blocking (Also supported in Flags parameter of TouchDeviceRead)
|
TOUCH_FLAG_PEEK_BUFFER = $00000002;
|
Peek at the buffer to see if any data is available, don't remove it (Used only in Flags parameter of TouchDeviceRead)
|
TOUCH_FLAG_MOUSE_DATA = $00000004;
|
If set the device will write a mouse data event for each touch event
|
TOUCH_FLAG_MULTI_POINT = $00000008;
|
If set the device supports multi point touch
|
TOUCH_FLAG_PRESSURE = $00000010;
|
If set the device supports pressure value on touch points
|
TOUCH_FLAG_SWAP_XY = $00000020;
|
If set swap the X and Y coordinates
|
TOUCH_FLAG_INVERT_X = $00000040;
|
If set invert the X coordinate
|
TOUCH_FLAG_INVERT_Y = $00000080;
|
If set invert the Y coordinate
|
TOUCH_FLAG_SWAP_MAX_XY = $00000100;
|
If set swap the maximum X and Y values
|
|
|
| Flags supported by TOUCH_CONTROL_GET/SET/CLEAR_FLAG
|
TOUCH_FLAG_MASK = TOUCH_FLAG_NON_BLOCK or TOUCH_FLAG_MOUSE_DATA or TOUCH_FLAG_MULTI_POINT or TOUCH_FLAG_PRESSURE or TOUCH_FLAG_SWAP_XY or TOUCH_FLAG_INVERT_X or TOUCH_FLAG_INVERT_Y or TOUCH_FLAG_SWAP_MAX_XY;
|
[Expand]
Touch device control code TOUCH_CONTROL_*
TOUCH_CONTROL_GET_FLAG = 1;
|
Get Flag
|
TOUCH_CONTROL_SET_FLAG = 2;
|
Set Flag
|
TOUCH_CONTROL_CLEAR_FLAG = 3;
|
Clear Flag
|
TOUCH_CONTROL_FLUSH_BUFFER = 4;
|
Flush Buffer
|
TOUCH_CONTROL_GET_WIDTH = 5;
|
Get Screen Width
|
TOUCH_CONTROL_GET_HEIGHT = 6;
|
Get Screen Height
|
TOUCH_CONTROL_GET_MAX_X = 7;
|
Get Maximum X value (Only applies to Absolute X values)
|
TOUCH_CONTROL_GET_MAX_Y = 8;
|
Get Maximum Y value (Only applies to Absolute Y values)
|
TOUCH_CONTROL_GET_MAX_Z = 9;
|
Get Maximum Z value (Only applies to Absolute Z values)
|
TOUCH_CONTROL_GET_MAX_POINTS = 10;
|
Get Maximum number of Touch Points
|
TOUCH_CONTROL_GET_ROTATION = 11;
|
Get Rotation value (0, 90, 180, 270)(Only where supported by the driver)
|
TOUCH_CONTROL_SET_ROTATION = 12;
|
Set Rotation value (0, 90, 180, 270)(Only where supported by the driver)
|
[Expand]
Touch buffer size TOUCH_BUFFER_*
TOUCH_BUFFER_SIZE = 1024;
|
|
[Expand]
Touch data definitions TOUCH_FINGER*, TOUCH_ID_*
| Values for TTouchData.Info
|
TOUCH_FINGER = $00000001;
|
A finger is pressed at this touch point
|
| Values for TTouchData.PointID
|
TOUCH_ID_UNKNOWN = Word(-1);
|
|
| Values for TTouchData.PositionX
|
TOUCH_X_UNKNOWN = -1;
|
|
| Values for TTouchData.PositionY
|
TOUCH_Y_UNKNOWN = -1;
|
|
| Values for TTouchData.PositionZ
|
TOUCH_Z_UNKNOWN = -1;
|
|
[Expand]
Touch rotation TOUCH_ROTATION_*
TOUCH_ROTATION_0 = FRAMEBUFFER_ROTATION_0;
|
No rotation
|
TOUCH_ROTATION_90 = FRAMEBUFFER_ROTATION_90;
|
90 degree rotation
|
TOUCH_ROTATION_180 = FRAMEBUFFER_ROTATION_180;
|
180 degree rotation
|
TOUCH_ROTATION_270 = FRAMEBUFFER_ROTATION_270;
|
270 degree rotation
|
[Expand]
Touch logging TOUCH_LOG_*
TOUCH_LOG_LEVEL_DEBUG = LOG_LEVEL_DEBUG;
|
Touch debugging messages
|
TOUCH_LOG_LEVEL_INFO = LOG_LEVEL_INFO;
|
Touch informational messages, such as a device being attached or detached
|
TOUCH_LOG_LEVEL_WARN = LOG_LEVEL_WARN;
|
Touch warning messages
|
TOUCH_LOG_LEVEL_ERROR = LOG_LEVEL_ERROR;
|
Touch error messages
|
TOUCH_LOG_LEVEL_NONE = LOG_LEVEL_NONE;
|
No Touch messages
|
Type definitions
Touch data
[Expand]
PTouchData = ^TTouchData;
TTouchData = record
Info:LongWord;
|
Bitmap of touch info values (eg TOUCH_FINGER)
|
PointID:Word;
|
The touch point ID value for this touch (First ID is 1)
|
PositionX:SmallInt;
|
The X position of this touch point
|
PositionY:SmallInt;
|
The Y position of this touch point
|
The Z position of this touch point (If applicable)
|
|
TouchWidth:Word;
|
The Width of this touch point (If applicable)
|
TouchHeight:Word;
|
The Height of this touch point (If applicable)
|
Parameter:Pointer;
|
The parameter for the event callback (If applicable)
|
Touch buffer
[Expand]
PTouchBuffer = ^TTouchBuffer;
TTouchBuffer = record
Wait:TSemaphoreHandle;
|
Buffer ready semaphore
|
Start:LongWord;
|
Index of first buffer ready
|
Count:LongWord;
|
Number of entries ready in buffer
|
Buffer:array[0..(TOUCH_BUFFER_SIZE - 1)] of TTouchData;
|
|
Touch properties
[Expand]
PTouchProperties = ^TTouchProperties;
TTouchProperties = record
Flags:LongWord;
|
Device flags (eg TOUCH_FLAG_MULTI_POINT)
|
Width:LongWord;
|
Screen Width
|
Height:LongWord;
|
Screen Height
|
Rotation:LongWord;
|
Screen Rotation (eg TOUCH_ROTATION_180)
|
MaxX:LongWord;
|
Maximum (absolute) X position for the touch device
|
MaxY:LongWord;
|
Maximum (absolute) Y position for the touch device
|
MaxZ:LongWord;
|
Maximum (absolute) Z position for the touch device (If applicable)
|
MaxWidth:LongWord;
|
Maximum touch width value for the touch device (If applicable)
|
MaxHeight:LongWord;
|
Maximum touch height value for the touch device (If applicable)
|
MaxPoints:LongWord;
|
Maximum number of touch points
|
Touch event callback
TTouchEvent = function(Touch:PTouchDevice; Data:PTouchData):LongWord;
|
|
Touch enumeration callback
TTouchEnumerate = function(Touch:PTouchDevice; Data:Pointer):LongWord;
|
|
Touch notification callback
TTouchNotification = function(Device:PDevice; Data:Pointer; Notification:LongWord):LongWord;
|
|
Touch device start
TTouchDeviceStart = function(Touch:PTouchDevice):LongWord;
|
|
Touch device stop
TTouchDeviceStop = function(Touch:PTouchDevice):LongWord;
|
|
Touch device peek
TTouchDevicePeek = function(Touch:PTouchDevice):LongWord;
|
|
Touch device read
TTouchDeviceRead = function(Touch:PTouchDevice; Buffer:Pointer; Size,Flags:LongWord; var Count:LongWord):LongWord;
|
|
Touch device write
TTouchDeviceWrite = function(Touch:PTouchDevice; Buffer:Pointer; Size,Count:LongWord):LongWord;
|
|
Touch device flush
TTouchDeviceFlush = function(Touch:PTouchDevice):LongWord;
|
|
Touch device update
TTouchDeviceUpdate = function(Touch:PTouchDevice):LongWord;
|
|
Touch device control
TTouchDeviceControl = function(Touch:PTouchDevice; Request:Integer; Argument1:PtrUInt; var Argument2:PtrUInt):LongWord;
|
|
Touch device get properties
TTouchDeviceGetProperties = function(Touch:PTouchDevice; Properties:PTouchProperties):LongWord;
|
|
Touch device
[Expand]
PTouchDevice = ^TTouchDevice;
TTouchDevice = record
| Device Properties
|
Device:TDevice;
|
The Device entry for this Touch device
|
| Touch Properties
|
TouchId:LongWord;
|
Unique Id of this Touch device in the Touch device table
|
TouchState:LongWord;
|
Touch device state (eg TOUCH_STATE_ENABLED)
|
DeviceStart:TTouchDeviceStart;
|
A Device specific DeviceStart method implementing the standard Touch device interface (Mandatory)
|
DeviceStop:TTouchDeviceStop;
|
A Device specific DeviceStop method implementing the standard Touch device interface (Mandatory)
|
DevicePeek:TTouchDevicePeek;
|
A Device specific DevicePeek method implementing a standard Touch device interface (Or nil if the default method is suitable)
|
DeviceRead:TTouchDeviceRead;
|
A Device specific DeviceRead method implementing a standard Touch device interface (Or nil if the default method is suitable)
|
DeviceWrite:TTouchDeviceWrite;
|
A Device specific DeviceWrite method implementing a standard Touch device interface (Or nil if the default method is suitable)
|
DeviceFlush:TTouchDeviceFlush;
|
A Device specific DeviceFlush method implementing a standard Touch device interface (Or nil if the default method is suitable)
|
DeviceUpdate:TTouchDeviceUpdate;
|
A Device specific DeviceUpdate method implementing a standard Touch device interface (Or nil if the default method is suitable)
|
DeviceControl:TTouchDeviceControl;
|
A Device specific DeviceControl method implementing a standard Touch device interface (Or nil if the default method is suitable)
|
DeviceGetProperties:TTouchDeviceGetProperties;
|
A Device specific DeviceGetProperties method implementing a standard Touch device interface (Or nil if the default method is suitable)
|
| Driver Properties
|
Lock:TMutexHandle;
|
Device lock
|
Event:TTouchEvent;
|
Event callback function (If assigned)
|
Parameter:Pointer;
|
Parameter for the event callback (or nil)
|
Buffer:TTouchBuffer;
|
Touch input buffer
|
Properties:TTouchProperties;
|
Device properties
|
| Statistics Properties
|
ReceiveCount:LongWord;
|
|
ReceiveErrors:LongWord;
|
|
BufferOverruns:LongWord;
|
|
| Internal Properties
|
Prev:PTouchDevice;
|
Previous entry in Touch device table
|
Next:PTouchDevice;
|
Next entry in Touch device table
|
Public variables
Touch logging
TOUCH_DEFAULT_LOG_LEVEL:LongWord = TOUCH_LOG_LEVEL_DEBUG;
|
Minimum level for Touch messages. Only messages with level greater than or equal to this will be printed.
|
TOUCH_LOG_ENABLED:Boolean;
|
|
Function declarations
Initialization functions
[Expand]
procedure TouchInit;
Description: Initialize the Touch unit and Touch device table
| Note
|
Called only during system startup
|
Touch functions
[Expand]
function TouchDeviceStart(Touch:PTouchDevice):LongWord;
Description: Start the specified Touch device ready for receiving events
| Touch
|
The Touch device to start
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
[Expand]
function TouchDeviceStop(Touch:PTouchDevice):LongWord;
Description: Stop the specified Touch device and terminate receiving events
| Touch
|
The Touch device to stop
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
[Expand]
function TouchDevicePeek(Touch:PTouchDevice):LongWord;
Description: Peek at the buffer of the specified touch device to see if any data packets are ready
| Touch
|
The Touch device to peek at
|
| Return
|
ERROR_SUCCESS if packets are ready, ERROR_NO_MORE_ITEMS if not or another error code on failure.
|
[Expand]
function TouchDeviceRead(Touch:PTouchDevice; Buffer:Pointer; Size,Flags:LongWord; var Count:LongWord):LongWord;
Description: Read touch data packets from the buffer of the specified touch device
| Touch
|
The Touch device to read from
|
| Buffer
|
Pointer to a buffer to copy the touch data packets to
|
| Size
|
The size of the buffer in bytes (Must be at least TTouchData or greater)
|
| Flags
|
The flags for the behaviour of the read (eg TOUCH_FLAG_NON_BLOCK)
|
| Count
|
The number of touch data packets copied to the buffer
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
[Expand]
function TouchDeviceWrite(Touch:PTouchDevice; Buffer:Pointer; Size,Count:LongWord):LongWord;
Description: Write touch data packets to the buffer of the specified touch device
| Touch
|
The Touch device to write to
|
| Buffer
|
Pointer to a buffer to copy the touch data packets from
|
| Size
|
The size of the buffer in bytes (Must be at least TTouchData or greater)
|
| Count
|
The number of touch data packets to copy from the buffer
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
[Expand]
function TouchDeviceFlush(Touch:PTouchDevice):LongWord;
Description: Flush the contents of the buffer of the specified touch device
| Touch
|
The Touch device to flush
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
[Expand]
function TouchDeviceUpdate(Touch:PTouchDevice):LongWord;
Description: Request the specified touch device to update the current configuration
| Touch
|
The Touch device to update
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
| Note
|
Items updated can include rotation, maximum X and Y and flags (If supported)
|
[Expand]
function TouchDeviceControl(Touch:PTouchDevice; Request:Integer; Argument1:PtrUInt; var Argument2:PtrUInt):LongWord;
Description: Perform a control request on the specified touch device
| Touch
|
The Touch device to control
|
| Request
|
The request code for the operation (eg TOUCH_CONTROL_GET_FLAG)
|
| Argument1
|
The first argument for the operation (Dependent on request code)
|
| Argument2
|
The second argument for the operation (Dependent on request code)
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
[Expand]
function TouchDeviceProperties(Touch:PTouchDevice; Properties:PTouchProperties):LongWord; inline;
Description: Get the properties for the specified Touch device
| Touch
|
The Touch device to get properties from
|
| Properties
|
Pointer to a TTouchProperties structure to fill in
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
| Note
|
Replaced by TouchDeviceGetProperties for consistency
|
[Expand]
function TouchDeviceGetProperties(Touch:PTouchDevice;Properties:PTouchProperties):LongWord;
Description: Get the properties for the specified Touch device
| Touch
|
The Touch device to get properties from
|
| Properties
|
Pointer to a TTouchProperties structure to fill in
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
[Expand]
function TouchDeviceCreate:PTouchDevice;
Description: Create a new Touch device entry
| Return
|
Pointer to new Touch device entry or nil if Touch device could not be created
|
[Expand]
function TouchDeviceCreateEx(Size:LongWord):PTouchDevice;
Description: Create a new Touch device entry
| Size
|
Size in bytes to allocate for new Touch device (Including the Touch device entry)
|
| Return
|
Pointer to new Touch device entry or nil if Touch device could not be created
|
[Expand]
function TouchDeviceDestroy(Touch:PTouchDevice):LongWord;
Description: Destroy an existing Touch device entry
| Touch
|
The Touch device to destroy
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
[Expand]
function TouchDeviceRegister(Touch:PTouchDevice):LongWord;
Description: Register a new Touch device in the Touch device table
| Touch
|
The Touch device to register
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
[Expand]
function TouchDeviceDeregister(Touch:PTouchDevice):LongWord;
Description: Deregister an Touch device from the Touch device table
| Touch
|
The Touch device to dregister
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
[Expand]
function TouchDeviceFind(TouchId:LongWord):PTouchDevice;
Description: Find a Touch device by ID in the Touch device table
| TouchId
|
The ID number of the Touch device to find
|
| Return
|
Pointer to Touch device entry or nil if not found
|
[Expand]
function TouchDeviceFindByName(const Name:String):PTouchDevice; inline;
Description: Find a Touch device by name in the device table
| Name
|
The name of the Touch device to find (eg Touch0)
|
| Return
|
Pointer to Touch device entry or nil if not found
|
[Expand]
function TouchDeviceFindByDescription(const Description:String):PTouchDevice; inline;
Description: Find a Touch device by description in the device table
| Description
|
The description of the Touch to find (eg USB Touchscreen)
|
| Return
|
Pointer to Touch device entry or nil if not found
|
[Expand]
function TouchDeviceEnumerate(Callback:TTouchEnumerate; Data:Pointer):LongWord;
Description: Enumerate all Touch devices in the Touch device table
| Callback
|
The callback function to call for each Touch device in the table
|
| Data
|
A private data pointer to pass to callback for each Touch device in the table
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
[Expand]
function TouchDeviceNotification(Touch:PTouchDevice; Callback:TTouchNotification; Data:Pointer; Notification,Flags:LongWord):LongWord;
Description: Register a notification for Touch device changes
| Touch
|
The Touch device to notify changes for (Optional, pass nil for all Touch devices)
|
| Callback
|
The function to call when a notification event occurs
|
| Data
|
A private data pointer to pass to callback when a notification event occurs
|
| Notification
|
The events to register for notification of (eg DEVICE_NOTIFICATION_REGISTER)
|
| Flags
|
The flags to control the notification (eg NOTIFIER_FLAG_WORKER)
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
Touch helper functions
[Expand]
function TouchGetCount:LongWord; inline;
Description: Get the current Touch device count
| Return
|
The number of Touch devices
|
[Expand]
function TouchDeviceGetDefault:PTouchDevice; inline;
Description: Get the current default Touch device
| Return
|
Pointer to default Touch device entry
|
[Expand]
function TouchDeviceSetDefault(Touch:PTouchDevice):LongWord;
Description: Set the current default Touch device
| Touch
|
The Touch device to set as default
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
[Expand]
function TouchDeviceCheck(Touch:PTouchDevice):PTouchDevice;
Description: Check if the supplied Touch device is in the Touch device table
| Touch
|
The Touch device to check
|
| Return
|
Pointer to Touch device entry or nil if not found
|
[Expand]
function TouchDeviceTypeToString(TouchType:LongWord):String;
Description: Return a string describing the Touch device type (eg TOUCH_TYPE_CAPACITIVE)
[Expand]
function TouchDeviceStateToString(TouchState:LongWord):String;
Description: Return a string describing the Touch device state (eg TOUCH_STATE_ENABLED)
[Expand]
function TouchDeviceRotationToString(Rotation:LongWord):String;
Description: Return a string describing the supplied touch rotation value
[Expand]
function TouchDeviceResolveRotation(ARotation:LongWord):LongWord;
Description: Resolve a value of 0, 90, 180 or 270 to a touch rotation constant (eg TOUCH_ROTATION_180)
| Note
|
Also accepts passing the touch rotation constant values directly
|
[Expand]
function TouchDeviceSetCallback(Touch:PTouchDevice; Event:TTouchEvent; Parameter:Pointer):LongWord;
Description: Set the event callback function for the specified touch device
| Touch
|
The touch device to set the event callback for
|
| Event
|
The event callback function to be called when touch data is received
|
| Parameter
|
A pointer to private data to be passed to the callback with each event
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
| Note
|
This function also clears the TOUCH_FLAG_MOUSE_DATA flag because the event callback is not compatible with receiving touch events as mouse data
|
[Expand]
function TouchInsertData(Touch:PTouchDevice; Data:PTouchData; Signal:Boolean):LongWord;
Description: Insert a TTouchData entry into the touch device buffer
| Touch
|
The touch device to insert data for
|
| Data
|
The TTouchData entry to insert
|
| Signal
|
If True then signal that new data is available in the buffer
|
| Return
|
ERROR_SUCCESS if completed or another error code on failure
|
| Note
|
Caller must hold the touch device lock
|
[Expand]
procedure TouchLog(Level:LongWord; Touch:PTouchDevice; const AText:String);
Description: To be documented
[Expand]
procedure TouchLogInfo(Touch:PTouchDevice; const AText:String); inline;
Description: To be documented
[Expand]
procedure TouchLogWarn(Touch:PTouchDevice; const AText:String); inline;
Description: To be documented
[Expand]
procedure TouchLogError(Touch:PTouchDevice; const AText:String); inline;
Description: To be documented
[Expand]
procedure TouchLogDebug(Touch:PTouchDevice; const AText:String); inline;
Description: To be documented
Return to Unit Reference
