Input

Input state, handlers, commands, shortcuts and undo history. More...

Classes
struct	tachyon::CommandID
	Handle to a registered command, stable for the manager's lifetime. More...
class	tachyon::CommandManager
	Registry of commands: named actions with an optional icon and an optional shortcut key, each firing one callback when invoked (clicked from a menu / toolbar, or via its key). More...
class	tachyon::InputHandlerBroadcaster
	Sends every platform input event to all handlers (e.g. More...
struct	tachyon::ElementEvent
	An input event delivered to an element's EventHandler. More...
struct	tachyon::RecordedInputEvent
	A single OS input event recorded for dispatch this frame. More...
class	tachyon::InputManager
	Receives raw OS events, records them, and runs the frame's input pipeline (tab navigation, text editor focus, dispatch, post-dispatch). More...
struct	tachyon::InputState
	Snapshot of input state for a single recorded OS event. More...
struct	tachyon::FileDrag
	A drag from another application, of files or text, over one of the app's windows. More...
struct	tachyon::FileDrop
	Files or text dropped from another application. More...
class	tachyon::IPlatformInputHandler
	Platform-level input interface: receives raw OS events (keyboard, mouse) and forwards them into the GUI input pipeline. More...
struct	tachyon::PointerDrag
	One press on an element that may become a drag. More...
class	tachyon::UndoHistory
	The app's undo history: steps that each undo and redo one change. More...

Typedefs
using	tachyon::EventHandler = std::function<bool(ElementEvent&& input)>
	Element-level input handler used by the immediate-mode dispatcher; returns true when it consumed the event.

Enumerations
enum class	tachyon::CommandMode : uint32_t { tachyon::CommandMode::Default = 0 }
	A set of shortcuts that is active while the app says so (e.g. More...
enum class	tachyon::KeyModifier : uint8_t {   tachyon::KeyModifier::None = 0 , tachyon::KeyModifier::Shift = 1 , tachyon::KeyModifier::Control = 2 , tachyon::KeyModifier::Alt = 4 ,   tachyon::KeyModifier::Option = 8 , tachyon::KeyModifier::Command = 16 }
	Modifier keys held, combined with |. More...
enum class	tachyon::MouseButtons : uint8_t {   tachyon::MouseButtons::None = 0 , tachyon::MouseButtons::Left = 1 , tachyon::MouseButtons::Middle = 2 , tachyon::MouseButtons::Right = 4 ,   tachyon::MouseButtons::X1 = 8 , tachyon::MouseButtons::X2 = 16 }
	Mouse buttons, combined with |. More...
enum class	tachyon::KeyAction : uint8_t { tachyon::KeyAction::KeyDown , tachyon::KeyAction::KeyUp , tachyon::KeyAction::KeyChar }
	A keyboard event: a key down or up, or a typed character (KeyChar). More...
enum class	tachyon::MouseAction : uint8_t { tachyon::MouseAction::MouseDown , tachyon::MouseAction::MouseUp }
	Whether a mouse button went down or up. More...
enum class	tachyon::FileDropAction : uint8_t {   tachyon::FileDropAction::Begin , tachyon::FileDropAction::Move , tachyon::FileDropAction::File , tachyon::FileDropAction::Text ,   tachyon::FileDropAction::Complete }
	A step of a drag from another application (files, text) over one of the app's windows. More...
enum class	tachyon::EventType : uint8_t {   tachyon::EventType::None = 0 , tachyon::EventType::MouseMove , tachyon::EventType::MouseDown , tachyon::EventType::MouseUp ,   tachyon::EventType::MouseScroll , tachyon::EventType::KeyDown , tachyon::EventType::KeyUp , tachyon::EventType::TextInput ,   tachyon::EventType::DragEnter , tachyon::EventType::DragOver , tachyon::EventType::DragOut , tachyon::EventType::Drop ,   tachyon::EventType::LabelDragBegin , tachyon::EventType::LabelDrag , tachyon::EventType::LabelDragEnd , tachyon::EventType::LabelDragCancel ,   tachyon::EventType::FileDragOver , tachyon::EventType::FileDrop }
	The kind of input event the GUI dispatches to element handlers. More...
enum class	tachyon::KeyCode : uint32_t {   tachyon::KeyCode::None = 0 , tachyon::KeyCode::Return , tachyon::KeyCode::Escape , tachyon::KeyCode::Backspace ,   tachyon::KeyCode::Tab , tachyon::KeyCode::Space , tachyon::KeyCode::Exclaim , tachyon::KeyCode::DoubleQuote ,   tachyon::KeyCode::Hash , tachyon::KeyCode::Percent , tachyon::KeyCode::Dollar , tachyon::KeyCode::Ampersand ,   tachyon::KeyCode::Quote , tachyon::KeyCode::LeftParen , tachyon::KeyCode::RightParen , tachyon::KeyCode::Asterisk ,   tachyon::KeyCode::Plus , tachyon::KeyCode::Comma , tachyon::KeyCode::Minus , tachyon::KeyCode::Period ,   tachyon::KeyCode::Slash , tachyon::KeyCode::Key0 , tachyon::KeyCode::Key1 , tachyon::KeyCode::Key2 ,   tachyon::KeyCode::Key3 , tachyon::KeyCode::Key4 , tachyon::KeyCode::Key5 , tachyon::KeyCode::Key6 ,   tachyon::KeyCode::Key7 , tachyon::KeyCode::Key8 , tachyon::KeyCode::Key9 , tachyon::KeyCode::Colon ,   tachyon::KeyCode::Semicolon , tachyon::KeyCode::Less , tachyon::KeyCode::Equals , tachyon::KeyCode::Greater ,   tachyon::KeyCode::Question , tachyon::KeyCode::At , tachyon::KeyCode::LeftBracket , tachyon::KeyCode::Backslash ,   tachyon::KeyCode::RightBracket , tachyon::KeyCode::Caret , tachyon::KeyCode::Underscore , tachyon::KeyCode::Backquote ,   tachyon::KeyCode::KeyA , tachyon::KeyCode::KeyB , tachyon::KeyCode::KeyC , tachyon::KeyCode::KeyD ,   tachyon::KeyCode::KeyE , tachyon::KeyCode::KeyF , tachyon::KeyCode::KeyG , tachyon::KeyCode::KeyH ,   tachyon::KeyCode::KeyI , tachyon::KeyCode::KeyJ , tachyon::KeyCode::KeyK , tachyon::KeyCode::KeyL ,   tachyon::KeyCode::KeyM , tachyon::KeyCode::KeyN , tachyon::KeyCode::KeyO , tachyon::KeyCode::KeyP ,   tachyon::KeyCode::KeyQ , tachyon::KeyCode::KeyR , tachyon::KeyCode::KeyS , tachyon::KeyCode::KeyT ,   tachyon::KeyCode::KeyU , tachyon::KeyCode::KeyV , tachyon::KeyCode::KeyW , tachyon::KeyCode::KeyX ,   tachyon::KeyCode::KeyY , tachyon::KeyCode::KeyZ , tachyon::KeyCode::Capslock , tachyon::KeyCode::F1 ,   tachyon::KeyCode::F2 , tachyon::KeyCode::F3 , tachyon::KeyCode::F4 , tachyon::KeyCode::F5 ,   tachyon::KeyCode::F6 , tachyon::KeyCode::F7 , tachyon::KeyCode::F8 , tachyon::KeyCode::F9 ,   tachyon::KeyCode::F10 , tachyon::KeyCode::F11 , tachyon::KeyCode::F12 , tachyon::KeyCode::Printscreen ,   tachyon::KeyCode::Scrolllock , tachyon::KeyCode::Pause , tachyon::KeyCode::Insert , tachyon::KeyCode::Home ,   tachyon::KeyCode::PageUp , tachyon::KeyCode::Delete , tachyon::KeyCode::End , tachyon::KeyCode::PageDown ,   tachyon::KeyCode::Right , tachyon::KeyCode::Left , tachyon::KeyCode::Down , tachyon::KeyCode::Up ,   tachyon::KeyCode::NUMLOCKCLEAR , tachyon::KeyCode::KeyPadDivide , tachyon::KeyCode::KeyPadMultiply , tachyon::KeyCode::KeyPadMinus ,   tachyon::KeyCode::KeyPadPlus , tachyon::KeyCode::KeyPadEnter , tachyon::KeyCode::KeyPad1 , tachyon::KeyCode::KeyPad2 ,   tachyon::KeyCode::KeyPad3 , tachyon::KeyCode::KeyPad4 , tachyon::KeyCode::KeyPad5 , tachyon::KeyCode::KeyPad6 ,   tachyon::KeyCode::KeyPad7 , tachyon::KeyCode::KeyPad8 , tachyon::KeyCode::KeyPad9 , tachyon::KeyCode::KeyPad0 ,   tachyon::KeyCode::KeyPadPeriod , tachyon::KeyCode::KeyPadEquals , tachyon::KeyCode::KeyPadComma , tachyon::KeyCode::KeyPadEqualsAs400 ,   tachyon::KeyCode::KeyPad00 , tachyon::KeyCode::KeyPad000 , tachyon::KeyCode::KeyPadLeftParen , tachyon::KeyCode::KeyPadRightParen ,   tachyon::KeyCode::KeyPadLeftBrace , tachyon::KeyCode::KeyPadRightBrace , tachyon::KeyCode::KeyPadTab , tachyon::KeyCode::KeyPadBackspace ,   tachyon::KeyCode::KeyPadA , tachyon::KeyCode::KeyPadB , tachyon::KeyCode::KeyPadC , tachyon::KeyCode::KeyPadD ,   tachyon::KeyCode::KeyPadE , tachyon::KeyCode::KeyPadF , tachyon::KeyCode::KeyPadXor , tachyon::KeyCode::KeyPadPower ,   tachyon::KeyCode::KeyPadPercent , tachyon::KeyCode::KeyPadLess , tachyon::KeyCode::KeyPadGreater , tachyon::KeyCode::KeyPadAmpersand ,   tachyon::KeyCode::KeyPadDoubleAmpersand , tachyon::KeyCode::KeyPadVerticalbar , tachyon::KeyCode::KeyPadDoubleVerticalbar , tachyon::KeyCode::KeyPadColon ,   tachyon::KeyCode::KeyPadHash , tachyon::KeyCode::KeyPadSpace , tachyon::KeyCode::KeyPadAt , tachyon::KeyCode::KeyPadExclam ,   tachyon::KeyCode::KeyPadMemstore , tachyon::KeyCode::KeyPadMemrecall , tachyon::KeyCode::KeyPadMemclear , tachyon::KeyCode::KeyPadMemadd ,   tachyon::KeyCode::KeyPadMemsubtract , tachyon::KeyCode::KeyPadMemmultiply , tachyon::KeyCode::KeyPadMemdivide , tachyon::KeyCode::KeyPadPlusminus ,   tachyon::KeyCode::KeyPadClear , tachyon::KeyCode::KeyPadClearentry , tachyon::KeyCode::KeyPadBinary , tachyon::KeyCode::KeyPadOctal ,   tachyon::KeyCode::KeyPadDecimal , tachyon::KeyCode::KeyPadHexadecimal , tachyon::KeyCode::Application , tachyon::KeyCode::Power ,   tachyon::KeyCode::F13 , tachyon::KeyCode::F14 , tachyon::KeyCode::F15 , tachyon::KeyCode::F16 ,   tachyon::KeyCode::F17 , tachyon::KeyCode::F18 , tachyon::KeyCode::F19 , tachyon::KeyCode::F20 ,   tachyon::KeyCode::F21 , tachyon::KeyCode::F22 , tachyon::KeyCode::F23 , tachyon::KeyCode::F24 ,   tachyon::KeyCode::Execute , tachyon::KeyCode::Help , tachyon::KeyCode::Menu , tachyon::KeyCode::Select ,   tachyon::KeyCode::Stop , tachyon::KeyCode::Again , tachyon::KeyCode::Undo , tachyon::KeyCode::Cut ,   tachyon::KeyCode::Copy , tachyon::KeyCode::Paste , tachyon::KeyCode::Find , tachyon::KeyCode::Mute ,   tachyon::KeyCode::Volumeup , tachyon::KeyCode::Volumedown , tachyon::KeyCode::Alterase , tachyon::KeyCode::Sysreq ,   tachyon::KeyCode::Cancel , tachyon::KeyCode::Clear , tachyon::KeyCode::Prior , tachyon::KeyCode::Return2 ,   tachyon::KeyCode::Separator , tachyon::KeyCode::Out , tachyon::KeyCode::Oper , tachyon::KeyCode::Clearagain ,   tachyon::KeyCode::Crsel , tachyon::KeyCode::Exsel , tachyon::KeyCode::ThousandsSeparator , tachyon::KeyCode::DecimalSeparator ,   tachyon::KeyCode::CurrencyUnit , tachyon::KeyCode::CurrencySubUnit , tachyon::KeyCode::LeftControl , tachyon::KeyCode::LeftShift ,   tachyon::KeyCode::LeftAlt , tachyon::KeyCode::LeftCommand , tachyon::KeyCode::RightControl , tachyon::KeyCode::RightShift ,   tachyon::KeyCode::RightAlt , tachyon::KeyCode::RightCommand , tachyon::KeyCode::Mode , tachyon::KeyCode::AudioNext ,   tachyon::KeyCode::AudioPrev , tachyon::KeyCode::AudioStop , tachyon::KeyCode::AudioPlay , tachyon::KeyCode::AudioMute ,   tachyon::KeyCode::MediaSelect , tachyon::KeyCode::WWW , tachyon::KeyCode::Mail , tachyon::KeyCode::Calculator ,   tachyon::KeyCode::Computer , tachyon::KeyCode::ACSearch , tachyon::KeyCode::ACHome , tachyon::KeyCode::ACBack ,   tachyon::KeyCode::ACForward , tachyon::KeyCode::ACStop , tachyon::KeyCode::ACRefresh , tachyon::KeyCode::ACBookmarks ,   tachyon::KeyCode::BrightnessDown , tachyon::KeyCode::BrightnessUp , tachyon::KeyCode::DisplaySwitch , tachyon::KeyCode::KeyboardIlluminationToggle ,   tachyon::KeyCode::KeyboardIlluminationDown , tachyon::KeyCode::KeyboardIlluminationUp , tachyon::KeyCode::Eject , tachyon::KeyCode::Sleep ,   tachyon::KeyCode::App1 , tachyon::KeyCode::App2 , tachyon::KeyCode::AudioRewind , tachyon::KeyCode::AudioFastforward ,   tachyon::KeyCode::SoftLeft , tachyon::KeyCode::SoftRight , tachyon::KeyCode::Call , tachyon::KeyCode::EndCall }
	Keys by what the keyboard layout makes them, not by position. More...

Functions
float	tachyon::DoubleClickMilliseconds () noexcept
	The most time between the two clicks of a double-click, milliseconds: the OS's setting, which the application reads from its window backend every frame.
void	tachyon::SetDoubleClickMilliseconds (float milliseconds) noexcept
	Sets DoubleClickMilliseconds; values of 0 or less are ignored.
EventHandler	tachyon::Chain (EventHandler first, EventHandler second)
	A handler that tries first, then second when first returns false.
constexpr bool	tachyon::IsDragTravel (int2 delta, int32_t distance) noexcept
	Whether the pointer moving delta pixels from a press makes it a drag: distance pixels or more in a straight line.
constexpr bool	tachyon::IsDragCancelKey (const InputState &s) noexcept
	Escape going down: cancels the drag of the element that has the event.

Variables
constexpr float	tachyon::kWheelScrollStep = 30.0f
	scrolled per wheel notch (CSS px)
constexpr int32_t	tachyon::kDragStartDistance = 4
	pointer travel before a press becomes a drag (CSS px)
constexpr float	tachyon::kDefaultDoubleClickMs = 500.0f
	The OS's double-click time if the platform reports one, else this, milliseconds.
tachyon::ID	tachyon::InputState::dragSourceID = tachyon::ID::Invalid()
	Drag-and-drop source and payload; set for drag events.
uint32_t	tachyon::InputState::dragPayloadType = 0
uintptr_t	tachyon::InputState::dragPayloadValue = 0

Detailed Description

Input state, handlers, commands, shortcuts and undo history.

Typedef Documentation

EventHandler

using tachyon::EventHandler = std::function<bool(ElementEvent&& input)>

#include <gui_core/input/gui_input_handler_func.h>

Element-level input handler used by the immediate-mode dispatcher; returns true when it consumed the event.

Enumeration Type Documentation

CommandMode

enum class tachyon::CommandMode : uint32_t

strong

#include <gui_core/input/gui_command_manager.h>

A set of shortcuts that is active while the app says so (e.g.

a node view's while it has the focus). Opaque: other values come from CommandManager::RegisterMode. Default is always registered and is the fallback when the active mode has no matching command.

Enumerator
Default

KeyModifier

enum class tachyon::KeyModifier : uint8_t

strong

#include <gui_core/input/gui_input_enums.h>

Modifier keys held, combined with |.

The Alt key reports as Option on macOS; Command is the Cmd key there and the Windows or Super key elsewhere.

Enumerator
None
Shift
Control
Alt
Option
Command

MouseButtons

enum class tachyon::MouseButtons : uint8_t

strong

#include <gui_core/input/gui_input_enums.h>

Mouse buttons, combined with |.

Enumerator
None
Left
Middle
Right
X1
X2

KeyAction

enum class tachyon::KeyAction : uint8_t

strong

#include <gui_core/input/gui_input_enums.h>

A keyboard event: a key down or up, or a typed character (KeyChar).

Enumerator
KeyDown
KeyUp
KeyChar

MouseAction

enum class tachyon::MouseAction : uint8_t

strong

#include <gui_core/input/gui_input_enums.h>

Whether a mouse button went down or up.

Enumerator
MouseDown
MouseUp

FileDropAction

enum class tachyon::FileDropAction : uint8_t

strong

#include <gui_core/input/gui_input_enums.h>

A step of a drag from another application (files, text) over one of the app's windows.

Enumerator
Begin	a drag came over the window
Move	it's at screenPos
File	dropped: one of its files, the path in data
Text	dropped: text, in data
Complete	it's over: after a drop's files and text, or it left the window

EventType

enum class tachyon::EventType : uint8_t

strong

#include <gui_core/input/gui_input_enums.h>

The kind of input event the GUI dispatches to element handlers.

Enumerator
None
MouseMove
MouseDown	which button: state.buttons & ~state.prevButtons
MouseUp	which button: state.prevButtons & ~state.buttons
MouseScroll
KeyDown
KeyUp
TextInput
DragEnter
DragOver
DragOut
Drop
LabelDragBegin	label -> control: drag starting; state.scroll.x = 0
LabelDrag	label -> control: drag in progress; state.scroll.x = pixels moved since the start
LabelDragEnd	label -> control: drag committed
LabelDragCancel	label -> control: drag cancelled (Escape)
FileDragOver	Files or text from another application are dragged over the element: return true to take them. What's dragged is known only once it's dropped.
FileDrop	Dropped on the element: state.droppedFiles, state.textInput. Return true when it took them; otherwise its parent is offered them, then the application's handler.

KeyCode

enum class tachyon::KeyCode : uint32_t

strong

#include <gui_core/input/gui_input_enums.h>

Keys by what the keyboard layout makes them, not by position.

KeyAction::KeyChar events carry a Unicode codepoint in this type instead.

Enumerator
None
Return
Escape
Backspace
Tab
Space
Exclaim
DoubleQuote
Hash
Percent
Dollar
Ampersand
Quote
LeftParen
RightParen
Asterisk
Plus
Comma
Minus
Period
Slash
Key0
Key1
Key2
Key3
Key4
Key5
Key6
Key7
Key8
Key9
Colon
Semicolon
Less
Equals
Greater
Question
At
LeftBracket
Backslash
RightBracket
Caret
Underscore
Backquote
KeyA
KeyB
KeyC
KeyD
KeyE
KeyF
KeyG
KeyH
KeyI
KeyJ
KeyK
KeyL
KeyM
KeyN
KeyO
KeyP
KeyQ
KeyR
KeyS
KeyT
KeyU
KeyV
KeyW
KeyX
KeyY
KeyZ
Capslock
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F11
F12
Printscreen
Scrolllock
Pause
Insert
Home
PageUp
Delete
End
PageDown
Right
Left
Down
Up
NUMLOCKCLEAR
KeyPadDivide
KeyPadMultiply
KeyPadMinus
KeyPadPlus
KeyPadEnter
KeyPad1
KeyPad2
KeyPad3
KeyPad4
KeyPad5
KeyPad6
KeyPad7
KeyPad8
KeyPad9
KeyPad0
KeyPadPeriod
KeyPadEquals
KeyPadComma
KeyPadEqualsAs400
KeyPad00
KeyPad000
KeyPadLeftParen
KeyPadRightParen
KeyPadLeftBrace
KeyPadRightBrace
KeyPadTab
KeyPadBackspace
KeyPadA
KeyPadB
KeyPadC
KeyPadD
KeyPadE
KeyPadF
KeyPadXor
KeyPadPower
KeyPadPercent
KeyPadLess
KeyPadGreater
KeyPadAmpersand
KeyPadDoubleAmpersand
KeyPadVerticalbar
KeyPadDoubleVerticalbar
KeyPadColon
KeyPadHash
KeyPadSpace
KeyPadAt
KeyPadExclam
KeyPadMemstore
KeyPadMemrecall
KeyPadMemclear
KeyPadMemadd
KeyPadMemsubtract
KeyPadMemmultiply
KeyPadMemdivide
KeyPadPlusminus
KeyPadClear
KeyPadClearentry
KeyPadBinary
KeyPadOctal
KeyPadDecimal
KeyPadHexadecimal
Application
Power
F13
F14
F15
F16
F17
F18
F19
F20
F21
F22
F23
F24
Execute
Help
Menu
Select
Stop
Again
Undo
Cut
Copy
Paste
Find
Mute
Volumeup
Volumedown
Alterase
Sysreq
Cancel
Clear
Prior
Return2
Separator
Out
Oper
Clearagain
Crsel
Exsel
ThousandsSeparator
DecimalSeparator
CurrencyUnit
CurrencySubUnit
LeftControl
LeftShift
LeftAlt
LeftCommand
RightControl
RightShift
RightAlt
RightCommand
Mode
AudioNext
AudioPrev
AudioStop
AudioPlay
AudioMute
MediaSelect
WWW
Mail
Calculator
Computer
ACSearch
ACHome
ACBack
ACForward
ACStop
ACRefresh
ACBookmarks
BrightnessDown
BrightnessUp
DisplaySwitch
KeyboardIlluminationToggle
KeyboardIlluminationDown
KeyboardIlluminationUp
Eject
Sleep
App1
App2
AudioRewind
AudioFastforward
SoftLeft
SoftRight
Call
EndCall

Function Documentation

DoubleClickMilliseconds()

float tachyon::DoubleClickMilliseconds ( )

noexcept

#include <gui_core/input/gui_input_enums.h>

The most time between the two clicks of a double-click, milliseconds: the OS's setting, which the application reads from its window backend every frame.

SetDoubleClickMilliseconds()

void tachyon::SetDoubleClickMilliseconds ( float milliseconds )

noexcept

#include <gui_core/input/gui_input_enums.h>

Sets DoubleClickMilliseconds; values of 0 or less are ignored.

Chain()

EventHandler tachyon::Chain ( EventHandler first, EventHandler second )

inline

#include <gui_core/input/gui_input_handler_func.h>

A handler that tries first, then second when first returns false.

IsDragTravel()

bool tachyon::IsDragTravel ( int2 delta, int32_t distance )

constexprnoexcept

#include <gui_core/input/gui_pointer_drag.h>

Whether the pointer moving delta pixels from a press makes it a drag: distance pixels or more in a straight line.

Every press that can be a click or a drag decides with this, at Px(kDragStartDistance).

IsDragCancelKey()

bool tachyon::IsDragCancelKey ( const InputState & s )

constexprnoexcept

#include <gui_core/input/gui_pointer_drag.h>

Escape going down: cancels the drag of the element that has the event.

Variable Documentation

kWheelScrollStep

float tachyon::kWheelScrollStep = 30.0f

constexpr

#include <gui_core/input/gui_input_enums.h>

scrolled per wheel notch (CSS px)

kDragStartDistance

int32_t tachyon::kDragStartDistance = 4

constexpr

#include <gui_core/input/gui_input_enums.h>

pointer travel before a press becomes a drag (CSS px)

kDefaultDoubleClickMs

float tachyon::kDefaultDoubleClickMs = 500.0f

constexpr

#include <gui_core/input/gui_input_enums.h>

The OS's double-click time if the platform reports one, else this, milliseconds.

dragSourceID

tachyon::ID tachyon::InputState::dragSourceID = tachyon::ID::Invalid()

Drag-and-drop source and payload; set for drag events.

dragPayloadType

uint32_t tachyon::InputState::dragPayloadType = 0

dragPayloadValue

uintptr_t tachyon::InputState::dragPayloadValue = 0