Module: player/TouchGestures

Classes

DoubleGesture
DummyGesture
Gesture
Line
SingleGesture

Members

(inner) currentGesture :module:player/TouchGestures.Gesture

The currently active gesture handler depending on the amount of touchpoints.

null, if no touches on the screen.

Type:
  • module:player/TouchGestures.Gesture
Source:

(inner) interactionGestureEnabled :boolean

When playing the presentation, are touch gestures enabled?

Inferred from enableMouseZoom, enableMouseTranslation, or enableMouseRotation in the current presentation.

Type:
  • boolean
Source:

(inner, constant) MAX_FLICK_TIME :number

Max time in ms to accept a touch move as quick swipe gesture

Type:
  • number
Default Value:
  • 100
Source:

(inner, constant) MIN_FLICK_TRAVEL :number

Min distance to accept a touch move as quick swipe gesture.

Threshhold to prevent any touch to be interpreted as swipe.

Type:
  • number
Default Value:
  • 20
Source:

(inner) MIN_SLOW_TRAVEL_X :number

Minimum distance to accept a touch move as slow swipe gesture in horizontal direction.

Value depends on screen size and therefore is (re)calculated

Type:
  • number
Source:

(inner) MIN_SLOW_TRAVEL_Y :number

Minimum distance to accept a touch move as slow swipe gesture in vertical direction.

Value depends on screen size and therefore is (re)calculated

Type:
  • number
Source:

(inner) player :module:player/Player.Player

The current Sozi player.

Type:
Source:

(inner) presentation :module:model/Presentation.Presentation

The current Sozi presentation.

Type:
Source:

(inner, constant) ROTATE_THRESHHOLD :number

Tolerance of slight rotation gesture movement assumed to be unintentional.

The Threshhold adds some visual stability to pan movements. Must be exceeded once to accept a rotating gesture.

Type:
  • number
Default Value:
  • 10
Source:

(inner, constant) ZOOM_LOW_THRESHHOLD :number

Lower tolerance of slight zoom gesture movement assumed to be unintentional.

The Threshhold adds some visual stability to pan movements. Must be exceeded once to accept a zoom gesture.

Type:
  • number
Source:

(inner, constant) ZOOM_UP_THRESHHOLD :number

Upper tolerance of slight zoom gesture movement assumed to be unintentional.

The Threshhold adds some visual stability to pan movements. Must be exceeded once to accept a zoom gesture.

Type:
  • number
Default Value:
  • 1.5
Source:

Methods

(static) init(pl, pr)

Initializes touch gestures.

This function adds touch listeners to the given parent.

Parameters:
Name Type Description
pl module:player/Player.Player

The current Player.
pr module:model/Presentation.Presentation

The presentation to play.
Source:

(inner) createGesture(touches) → {module:player/TouchGestures.Gesture}

Creates a new gesture handler according to the number of currently applied touches.

If no appropriate handler can be identified according to number of touch points or the presentation's mouse enabled policy, a dummy handler is returned. The dummy does nothing in effect, but avoids the createGesture function to be called repeatedly.

Parameters:
Name Type Description
touches Array.<object>

Array of currently active touches
Source:
Returns:
  • A new gesture handler matching the number of touches, or null if no handler matches.
Type
module:player/TouchGestures.Gesture

(inner) onTouchEnd(evt)

Processes a touch end event.

Parameters:
Name Type Description
evt TouchEvent

The DOM event to process.
Source:
Listens to Events:
  • event:touchend

(inner) onTouchMove(evt)

Processes a touch move event.

Parameters:
Name Type Description
evt TouchEvent

The DOM event to process.
Source:
Listens to Events:
  • event:touchmove

(inner) onTouchStart(evt)

Processes a touch start event.

Initializes a gesture handler.

Parameters:
Name Type Description
evt TouchEvent

The DOM event to process.
Source:
Listens to Events:
  • event:touchstart

(inner) updateGesture(touches)

Checks, if the current gesture handler is appropriate for the given touches.

If not, a new gesture handler is put in place.

Parameters:
Name Type Description
touches Array.<object>

Array of currently active touches.
Source:

(inner) updateScreenValues()

Updates all parameters depending on screen dimensions.

Source:
Listens to Events:
  • event:resize