Unit Mouse
From Ultibo.org
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Description
Ultibo Mouse Interface unit
Mouse Devices
This unit provides the Mouse device interface and mouse API to be used by both drivers and applications.
The API includes functions to create, register, locate, read, write, control and configure each connected mouse device.
The API supports a global mouse buffer so multiple devices can feed data into a common buffer as well as a buffer per device to allow each device to be used for a specific purpose. For example an application with two separate displays may choose to have a mouse or pointing device to control each one individually.
Constants
Mouse specific constants
MOUSE_* MOUSE_NAME_PREFIX = 'Mouse';
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Name prefix for Mouse Devices |
Mouse device type
MOUSE_TYPE_* MOUSE_TYPE_NONE = 0;
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MOUSE_TYPE_USB = 1;
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MOUSE_TYPE_PS2 = 2;
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MOUSE_TYPE_SERIAL = 3;
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MOUSE_TYPE_MAX = 3;
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Mouse device state
MOUSE_STATE_* MOUSE_STATE_DETACHED = 0;
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MOUSE_STATE_DETACHING = 1;
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MOUSE_STATE_ATTACHING = 2;
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MOUSE_STATE_ATTACHED = 3;
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MOUSE_STATE_MAX = 3;
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Mouse device flag
MOUSE_FLAG_* MOUSE_FLAG_NONE = $00000000;
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MOUSE_FLAG_NON_BLOCK = $00000001;
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If set device reads are non blocking (Also supported in Flags parameter of MouseReadEx) |
MOUSE_FLAG_DIRECT_READ = $00000002;
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If set device writes mouse data to its local buffer which must be read using MouseDeviceRead |
MOUSE_FLAG_SWAP_BUTTONS = $00000004;
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If set left and right mouse buttons will be swapped in mouse data |
MOUSE_FLAG_PEEK_BUFFER = $00000008;
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Peek at the buffer to see if any data is available, don't remove it. (Used only in Flags parameter of MouseReadEx) |
MOUSE_FLAG_SWAP_XY = $00000010;
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If set swap the X and Y coordinates |
MOUSE_FLAG_INVERT_X = $00000020;
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If set invert the X coordinate |
MOUSE_FLAG_INVERT_Y = $00000040;
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If set invert the Y coordinate |
MOUSE_FLAG_SWAP_MAX_XY = $00000080;
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If set swap the maximum X and Y values |
| Flags supported by MOUSE_CONTROL_GET/SET/CLEAR_FLAG | |
MOUSE_FLAG_MASK = MOUSE_FLAG_NON_BLOCK or MOUSE_FLAG_DIRECT_READ or MOUSE_FLAG_SWAP_BUTTONS or MOUSE_FLAG_SWAP_XY or MOUSE_FLAG_INVERT_X or MOUSE_FLAG_INVERT_Y or MOUSE_FLAG_SWAP_MAX_XY;
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Mouse device control code
MOUSE_CONTROL_* MOUSE_CONTROL_GET_FLAG = 1;
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Get Flag |
MOUSE_CONTROL_SET_FLAG = 2;
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Set Flag |
MOUSE_CONTROL_CLEAR_FLAG = 3;
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Clear Flag |
MOUSE_CONTROL_FLUSH_BUFFER = 4;
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Flush Buffer |
MOUSE_CONTROL_GET_SAMPLE_RATE = 5;
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Get Sample Rate |
MOUSE_CONTROL_SET_SAMPLE_RATE = 6;
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Set Sample Rate |
MOUSE_CONTROL_GET_MAX_X = 7;
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Get Maximum X value (Only applies to Absolute X values) |
MOUSE_CONTROL_GET_MAX_Y = 8;
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Get Maximum Y value (Only applies to Absolute Y values) |
MOUSE_CONTROL_GET_MAX_WHEEL = 9;
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Get Maximum Wheel value (Only applies to Absolute Wheel values) |
MOUSE_CONTROL_GET_MAX_BUTTONS = 10;
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Get Maximum Buttons mask (eg MOUSE_LEFT_BUTTON or MOUSE_RIGHT_BUTTON etc) |
MOUSE_CONTROL_GET_ROTATION = 11;
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Get Rotation value (0, 90, 180, 270) (Only where supported by the driver) |
MOUSE_CONTROL_SET_ROTATION = 12;
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Set Rotation value (0, 90, 180, 270) (Only where supported by the driver) |
Mouse buffer size
MOUSE_BUFFER_* MOUSE_BUFFER_SIZE = 512;
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Mouse sampling rate
MOUSE_SAMPLE_* MOUSE_SAMPLE_RATE = 100;
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100 samples/sec |
Mouse data definition
MOUSE_LEFT_*, MOUSE_RIGHT_* | Values for TMouseData.Buttons | |
MOUSE_LEFT_BUTTON = $0001;
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The Left mouse button is pressed |
MOUSE_RIGHT_BUTTON = $0002;
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The Right mouse button is pressed |
MOUSE_MIDDLE_BUTTON = $0004;
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The Middle mouse button is pressed |
MOUSE_SIDE_BUTTON = $0008;
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The Side mouse button is pressed |
MOUSE_EXTRA_BUTTON = $0010;
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The Extra mouse button is pressed |
MOUSE_TOUCH_BUTTON = $0020;
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The Touch screen is being touched |
MOUSE_ABSOLUTE_X = $0040;
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The OffsetX value is absolute not relative |
MOUSE_ABSOLUTE_Y = $0080;
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The OffsetY value is absolute not relative |
MOUSE_ABSOLUTE_WHEEL = $0100;
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The OffsetWheel value is absolute not relative |
Mouse rotation
MOUSE_ROTATION_* MOUSE_ROTATION_0 = FRAMEBUFFER_ROTATION_0;
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No rotation |
MOUSE_ROTATION_90 = FRAMEBUFFER_ROTATION_90;
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90 degree rotation |
MOUSE_ROTATION_180 = FRAMEBUFFER_ROTATION_180;
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180 degree rotation |
MOUSE_ROTATION_270 = FRAMEBUFFER_ROTATION_270;
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270 degree rotation |
Mouse logging
MOUSE_LOG_* MOUSE_LOG_LEVEL_DEBUG = LOG_LEVEL_DEBUG;
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Mouse debugging messages |
MOUSE_LOG_LEVEL_INFO = LOG_LEVEL_INFO;
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Mouse informational messages, such as a device being attached or detached |
MOUSE_LOG_LEVEL_WARN = LOG_LEVEL_WARN;
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Mouse warning messages |
MOUSE_LOG_LEVEL_ERROR = LOG_LEVEL_ERROR;
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Mouse error messages |
MOUSE_LOG_LEVEL_NONE = LOG_LEVEL_NONE;
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No Mouse messages |
USB mouse specific constants
USBMOUSE_* | Note: The following constants are duplicated with the USBMouse unit for backwards compatibility |
USB HID types
USB_HID_* | HID Interface Subclass types (See USB HID v1.11 specification) | |
USB_HID_SUBCLASS_NONE = 0;
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Section 4.2 |
USB_HID_SUBCLASS_BOOT = 1;
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Section 4.2 |
| HID Interface Protocol types (See USB HID v1.11 specification) | |
USB_HID_BOOT_PROTOCOL_NONE = 0;
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Section 4.3 |
USB_HID_BOOT_PROTOCOL_KEYBOARD = 1;
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Section 4.3 |
USB_HID_BOOT_PROTOCOL_MOUSE = 2;
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Section 4.3 |
| HID Class Descriptor Types (See USB HID v1.11 specification) | |
USB_HID_DESCRIPTOR_TYPE_HID = $21;
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Section 7.1 |
USB_HID_DESCRIPTOR_TYPE_REPORT = $22;
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Section 7.1 |
USB_HID_DESCRIPTOR_TYPE_PHYSICAL_DESCRIPTOR = $23;
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Section 7.1 |
| HID Request types | |
USB_HID_REQUEST_GET_REPORT = $01;
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USB_HID_REQUEST_GET_IDLE = $02;
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USB_HID_REQUEST_GET_PROTOCOL = $03;
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Section 7.2 |
USB_HID_REQUEST_SET_REPORT = $09;
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USB_HID_REQUEST_SET_IDLE = $0A;
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USB_HID_REQUEST_SET_PROTOCOL = $0B;
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Section 7.2 |
| HID Protocol types | |
USB_HID_PROTOCOL_BOOT = 0;
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Section 7.2.5 |
USB_HID_PROTOCOL_REPORT = 1;
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Section 7.2.5 |
| HID Report types | |
USB_HID_REPORT_INPUT = 1;
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Section 7.2.1 |
USB_HID_REPORT_OUTPUT = 2;
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Section 7.2.1 |
USB_HID_REPORT_FEATURE = 3;
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Section 7.2.1 |
| HID Report IDs | |
USB_HID_REPORTID_NONE = 0;
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Section 7.2.1 |
| HID Boot Protocol Button bits | |
USB_HID_BOOT_LEFT_BUTTON = (1 shl 0);
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USB_HID_BOOT_RIGHT_BUTTON = (1 shl 1);
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USB_HID_BOOT_MIDDLE_BUTTON = (1 shl 2);
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USB_HID_BOOT_SIDE_BUTTON = (1 shl 3);
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USB_HID_BOOT_EXTRA_BUTTON = (1 shl 4);
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| HID Boot Protocol Report data | |
USB_HID_BOOT_REPORT_SIZE = 3;
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Appendix B of HID Device Class Definition 1.11 |
USB_HID_BOOT_DATA_SIZE = 8;
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Allocate more than the minimum to allow for extra data |
Type definitions
Mouse data
PMouseData = ^TMouseData;
TMouseData = record
Buttons:Word;
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The bitmap of current button values (eg MOUSE_LEFT_BUTTON or MOUSE_RIGHT_BUTTON) |
OffsetX:SmallInt;
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The X offset of the mouse pointer (May be negative, read as absolute if Buttons includes MOUSE_ABSOLUTE_X) |
OffsetY:SmallInt;
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The Y offset of the mouse pointer (May be negative, read as absolute if Buttons includes MOUSE_ABSOLUTE_Y) |
OffsetWheel:SmallInt;
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The X offset of the mouse pointer (May be negative, read as absolute if Buttons includes MOUSE_ABSOLUTE_WHEEL) |
MaximumX:Word;
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The maximum X value of the mouse (Only applicable if Buttons includes MOUSE_ABSOLUTE_X, otherwise must be 0) |
MaximumY:Word;
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The maximum Y value of the mouse (Only applicable if Buttons includes MOUSE_ABSOLUTE_Y, otherwise must be 0) |
MaximumWheel:Word;
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The maximum Wheel value of the mouse (Only applicable if Buttons includes MOUSE_ABSOLUTE_WHEEL, otherwise must be 0) |
Reserved:Word;
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Reserved field (Round structure to 16 bytes) |
Mouse buffer
PMouseBuffer = ^TMouseBuffer;
TMouseBuffer = record
Wait:TSemaphoreHandle;
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Buffer ready semaphore |
Start:LongWord;
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Index of first buffer ready |
Count:LongWord;
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Number of entries ready in buffer |
Buffer:array[0..(MOUSE_BUFFER_SIZE - 1)] of TMouseData;
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Mouse properties
PMouseProperties = ^TMouseProperties;
TMouseProperties = record
Flags:LongWord;
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Device flags (eg MOUSE_FLAG_SWAP_BUTTONS) |
Rotation:LongWord;
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Screen Rotation (eg MOUSE_ROTATION_180) |
MaxX:LongWord;
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Maximum (absolute) X value for the mouse device |
MaxY:LongWord;
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Maximum (absolute) Y value for the mouse device |
MaxWheel:LongWord;
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Maximum (absolute) wheel value for the mouse device |
MaxButtons:LongWord;
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Maximum buttons mask (eg MOUSE_LEFT_BUTTON or MOUSE_RIGHT_BUTTON etc) |
Mouse enumeration callback
TMouseEnumerate = function(Mouse:PMouseDevice; Data:Pointer):LongWord;
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Mouse notification callback
TMouseNotification = function(Device:PDevice; Data:Pointer; Notification:LongWord):LongWord;
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Mouse device read
TMouseDeviceRead = function(Mouse:PMouseDevice; Buffer:Pointer; Size:LongWord; var Count:LongWord):LongWord;
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Mouse device update
TMouseDeviceUpdate = function(Mouse:PMouseDevice):LongWord; stdcall;
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Mouse device control
TMouseDeviceControl = function(Mouse:PMouseDevice; Request:Integer; Argument1:PtrUInt; var Argument2:PtrUInt):LongWord;
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Mouse device get properties
TMouseDeviceGetProperties = function(Mouse:PMouseDevice; Properties:PMouseProperties):LongWord; stdcall;
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Mouse device types
PMouseDevice = ^TMouseDevice;
TMouseDevice = record
| Device Properties | |
Device:TDevice;
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The Device entry for this Mouse |
| Mouse Properties | |
MouseId:LongWord;
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Unique Id of this Mouse in the Mouse table |
MouseState:LongWord;
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Mouse state (eg MOUSE_STATE_ATTACHED) |
MouseRate:LongWord;
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Mouse sample rate (Samples per second) |
DeviceRead:TMouseDeviceRead;
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A Device specific DeviceRead method implementing a standard Mouse device interface (Or nil if the default method is suitable) |
DeviceUpdate:TMouseDeviceUpdate;
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A Device specific DeviceUpdate method implementing a standard Mouse device interface (Or nil if the default method is suitable) |
DeviceControl:TMouseDeviceControl;
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A Device specific DeviceControl method implementing a standard Mouse device interface (Or nil if the default method is suitable) |
DeviceGetProperties:TMouseDeviceGetProperties;
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A Device specific DeviceGetProperties method implementing a standard Mouse device interface (Or nil if the default method is suitable) |
| Driver Properties | |
Lock:TMutexHandle;
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Mouse lock |
Buffer:TMouseBuffer;
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Mouse input buffer |
Properties:TMouseProperties;
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Device properties |
| Statistics Properties | |
ReceiveCount:LongWord;
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ReceiveErrors:LongWord;
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BufferOverruns:LongWord;
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| Internal Properties | |
Prev:PMouseDevice;
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Previous entry in Mouse table |
Next:PMouseDevice;
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Next entry in Mouse table |
USB HID descriptor
PUSBHIDDescriptor = ^TUSBHIDDescriptor;
TUSBHIDDescriptor = packed record
bLength:Byte;
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bDescriptorType:Byte;
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bcdHID:Word;
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bCountryCode:Byte;
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bNumDescriptors:Byte;
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bHIDDescriptorType:Byte;
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wHIDDescriptorLength:Word;
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| Note: Up to two optional bHIDDescriptorType/wHIDDescriptorLength pairs after the Report descriptor details | |
Public variables
Mouse logging
MOUSE_DEFAULT_LOG_LEVEL:LongWord = MOUSE_LOG_LEVEL_DEBUG;
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Minimum level for Mouse messages. Only messages with level greater than or equal to this will be printed. |
MOUSE_LOG_ENABLED:Boolean;
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Function declarations
Initialization functions
procedure MouseInit;
Description: Initialize the mouse unit and device table
| Note | Called only during system startup |
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Mouse functions
function MousePeek:LongWord;
Description: Peek at the global mouse buffer to see if any data packets are ready
| Return | ERROR_SUCCESS if packets are ready, ERROR_NO_MORE_ITEMS if not or another error code on failure |
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function MouseRead(Buffer:Pointer; Size:LongWord; var Count:LongWord):LongWord; inline;
Description: Read mouse data packets from the global mouse buffer
| Buffer | Pointer to a buffer to copy the mouse data packets to |
|---|---|
| Size | The size of the buffer in bytes (Must be at least TMouseData or greater) |
| Count | The number of mouse data packets copied to the bufferm |
| Return | ERROR_SUCCESS if completed or another error code on failure |
function MouseReadEx(Buffer:Pointer; Size,Flags:LongWord; var Count:LongWord):LongWord;
Description: Read mouse data packets from the global mouse buffer
| Buffer | Pointer to a buffer to copy the mouse data packets to |
|---|---|
| Size | The size of the buffer in bytes (Must be at least TMouseData or greater) |
| Flags | The flags for the behaviour of the read (eg MOUSE_FLAG_NON_BLOCK) |
| Count | The number of mouse data packets copied to the buffer |
| Return | ERROR_SUCCESS if completed or another error code on failure |
function MouseWrite(Buffer:Pointer; Size,Count:LongWord):LongWord;
Description: Write mouse data packets to the global mouse buffer
| Buffer | Pointer to a buffer to copy the mouse data packets from |
|---|---|
| Size | The size of the buffer in bytes (Must be at least TMouseData or greater) |
| Count | The number of mouse data packets to copy from the buffer |
| Return | ERROR_SUCCESS if completed or another error code on failure |
function MouseFlush:LongWord;
Description: Flush the contents of the global mouse buffer
| Return | ERROR_SUCCESS if completed or another error code on failure |
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function MouseDeviceRead(Mouse:PMouseDevice; Buffer:Pointer; Size:LongWord; var Count:LongWord):LongWord;
Description: Read mouse data packets from the buffer of the specified mouse
| Mouse | The mouse device to read from |
|---|---|
| Buffer | Pointer to a buffer to copy the mouse data packets to |
| Size | The size of the buffer in bytes (Must be at least TMouseData or greater) |
| Count | The number of mouse data packets copied to the buffer |
| Return | ERROR_SUCCESS if completed or another error code on failure |
function MouseDeviceUpdate(Mouse:PMouseDevice):LongWord;
Description: Request the specified mouse device to update the current configuration
| Mouse | The mouse device to update |
|---|---|
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | Items updated can include rotation, maximum X, Y and wheel and flags (If supported) |
function MouseDeviceControl(Mouse:PMouseDevice; Request:Integer; Argument1:PtrUInt; var Argument2:PtrUInt):LongWord;
Description: Perform a control request on the specified mouse device
| Mouse | The mouse device to control |
|---|---|
| Request | The request code for the operation (eg MOUSE_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 |
function MouseDeviceGetProperties(Mouse:PMouseDevice; Properties:PMouseProperties):LongWord;
Description: Get the properties for the specified mouse device
| Mouse | The mouse device to get properties from |
|---|---|
| Properties | Pointer to a TMouseProperties structure to fill in |
| Return | ERROR_SUCCESS if completed or another error code on failure |
function MouseDeviceSetState(Mouse:PMouseDevice; State:LongWord):LongWord;
Description: Set the state of the specified mouse and send a notification
| Mouse | The mouse to set the state for |
|---|---|
| State | The new state to set and notify |
| Return | ERROR_SUCCESS if completed or another error code on failure |
function MouseDeviceCreate:PMouseDevice;
Description: Create a new Mouse device entry
| Return | Pointer to new Mouse device entry or nil if mouse could not be created |
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function MouseDeviceCreateEx(Size:LongWord):PMouseDevice;
Description: Create a new Mouse device entry
| Size | Size in bytes to allocate for new mouse (Including the mouse device entry) |
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| Return | Pointer to new Mouse device entry or nil if mouse could not be created |
function MouseDeviceDestroy(Mouse:PMouseDevice):LongWord;
Description: Destroy an existing Mouse device entry
| Mouse | The mouse device to destroy |
|---|---|
| Return | ERROR_SUCCESS if completed or another error code on failure |
function MouseDeviceRegister(Mouse:PMouseDevice):LongWord;
Description: Register a new Mouse device in the Mouse table
| Mouse | The mouse device to register |
|---|---|
| Return | ERROR_SUCCESS if completed or another error code on failure |
function MouseDeviceDeregister(Mouse:PMouseDevice):LongWord;
Description: Deregister a Mouse device from the Mouse table
| Mouse | The mouse device to deregister |
|---|---|
| Return | ERROR_SUCCESS if completed or another error code on failure |
function MouseDeviceFind(MouseId:LongWord):PMouseDevice;
Description: Find a mouse device by ID in the mouse table
| MouseId | The ID number of the mouse to find |
|---|---|
| Return | Pointer to mouse device entry or nil if not found |
function MouseDeviceFindByName(const Name:String):PMouseDevice; inline;
Description: Find a mouse device by name in the mouse table
| Name | The name of the mouse to find (eg Mouse0) |
|---|---|
| Return | Pointer to mouse device entry or nil if not found |
function MouseDeviceFindByDescription(const Description:String):PMouseDevice; inline;
Description: Find a mouse device by description in the mouse table
| Description | The description of the mouse to find (eg USB HID Mouse) |
|---|---|
| Return | Pointer to mouse device entry or nil if not found |
function MouseDeviceEnumerate(Callback:TMouseEnumerate; Data:Pointer):LongWord;
Description: Enumerate all mouse devices in the mouse table
| Callback | The callback function to call for each mouse in the table |
|---|---|
| Data | A private data pointer to pass to callback for each mouse in the table |
| Return | ERROR_SUCCESS if completed or another error code on failure |
function MouseDeviceNotification(Mouse:PMouseDevice; Callback:TMouseNotification; Data:Pointer; Notification,Flags:LongWord):LongWord;
Description: Register a notification for mouse device changes
| Mouse | The mouse device to notify changes for (Optional, pass nil for all mice) |
|---|---|
| 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) |
RTL console functions
function SysConsoleHideMouse(AUserData:Pointer):Boolean;
Description: Handler for Platform ConsoleHideMouse function
| Note | None documented |
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function SysConsoleShowMouse(X,Y:LongWord; AUserData:Pointer):Boolean;
Description: Handler for Platform ConsoleShowMouse function
| Note | None documented |
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function SysConsoleReadMouse(var X,Y,Buttons:LongWord; AUserData:Pointer):Boolean;
Description: Handler for Platform ConsoleReadMouse function
| Note | None documented |
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Mouse helper functions
function MouseGetCount:LongWord;
Description: Get the current mouse count
| Note | None documented |
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function MouseDeviceCheck(Mouse:PMouseDevice):PMouseDevice;
Description: Check if the supplied Mouse is in the mouse table
| Note | None documented |
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function MouseDeviceTypeToString(MouseType:LongWord):String;
Description: To be documented
| Note | None documented |
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function MouseDeviceStateToString(MouseState:LongWord):String;
Description: To be documented
| Note | None documented |
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function MouseDeviceRotationToString(Rotation:LongWord):String;
Description: Return a string describing the supplied mouse rotation value
| Note | None documented |
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function MouseDeviceStateToNotification(State:LongWord):LongWord;
Description: Convert a Mouse state value into the notification code for device notifications
| Note | None documented |
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function MouseDeviceResolveRotation(ARotation:LongWord):LongWord;
Description: Resolve a value of 0, 90, 180 or 270 to a mouse rotation constant (eg MOUSE_ROTATION_180)
| Note | Also accepts passing the mouse rotation constant values directly |
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function MouseInsertData(Mouse:PMouseDevice; Data:PMouseData; Signal:Boolean):LongWord;
Description: Insert a TMouseData entry into the mouse buffer (Direct or Global)
| Mouse | The mouse device to insert data for |
|---|---|
| Data | The TMouseData 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 mouse lock |
procedure MouseLog(Level:LongWord; Mouse:PMouseDevice; const AText:String);
Description: To be documented
| Note | None documented |
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procedure MouseLogInfo(Mouse:PMouseDevice; const AText:String); inline;
Description: To be documented
| Note | None documented |
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procedure MouseLogWarn(Mouse:PMouseDevice; const AText:String); inline;
Description: To be documented
| Note | None documented |
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procedure MouseLogError(Mouse:PMouseDevice; const AText:String); inline;
Description: To be documented
| Note | None documented |
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procedure MouseLogDebug(Mouse:PMouseDevice;const AText:String); inline;
Description: To be documented
| Note | None documented |
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