touch

Documentation

Overview

Package touch defines an event for touch input, for the GoGi GUI system.

Index

• Variables
• type Actions
  • func (i *Actions) FromString(s string) error
  • func (i Actions) String() string
• type Event
  • func (ev Event) HasPos() bool
  • func (ev Event) OnFocus() bool
  • func (ev Event) Pos() image.Point
  • func (ev Event) Type() oswin.EventType
• type Sequence

Variables

var KiT_Actions = kit.Enums.AddEnum(ActionsN, false, nil)

Types

type Actions

type Actions int32

Actions describes the action taken for a touch event.

const (
	// Begin is a user first touching the device.
	//
	// On Android, this is a AMOTION_EVENT_ACTION_DOWN.
	// On iOS, this is a call to touchesBegan.
	Begin Actions = iota

	// Move is a user dragging across the device.
	//
	// A TypeMove is delivered between a TypeBegin and TypeEnd.
	//
	// On Android, this is a AMOTION_EVENT_ACTION_MOVE.
	// On iOS, this is a call to touchesMoved.
	Move

	// End is a user no longer touching the device.
	//
	// On Android, this is a AMOTION_EVENT_ACTION_UP.
	// On iOS, this is a call to touchesEnded.
	End

	ActionsN
)

func (*Actions) FromString

func (i *Actions) FromString(s string) error

func (Actions) String

func (i Actions) String() string

type Event

type Event struct {
	oswin.EventBase

	// Where is the touch location, in raw display dots (raw, actual pixels)
	Where image.Point

	// Sequence is the sequence number. The same number is shared by all events
	// in a sequence. A sequence begins with a single Begin, is followed by
	// zero or more Moves, and ends with a single End. A Sequence
	// distinguishes concurrent sequences but its value is subsequently reused.
	Sequence Sequence

	// Action is the touch action
	Action Actions
}

touch.Event is a touch event.

func (Event) HasPos

func (ev Event) HasPos() bool

func (Event) OnFocus

func (ev Event) OnFocus() bool

func (Event) Pos

func (ev Event) Pos() image.Point

func (Event) Type

func (ev Event) Type() oswin.EventType

type Sequence

type Sequence int64

Sequence identifies a sequence of touch events.