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Commit edb5a8c8 authored by Mike Schneider's avatar Mike Schneider
Browse files

Implement `GestureContext` for gesture transitions #MotionMechanics #STL 

Flag: com.android.systemui.scene_container
Bug: 388464679
Test: atest DistanceGestureContextTest
Change-Id: I8e3586d07d0fb7b261f4b5d5cc1574e5d3c56f5a
parent 9142dc1d

mechanics/src/com/android/mechanics/GestureContext.kt

+13 −2
Original line number Diff line number Diff line
@@ -58,8 +58,19 @@ interface GestureContext { 
    val dragOffset: Float

}



/**

 * [GestureContext] with a mutable [dragOffset].

 *

 * The implementation class defines whether the [direction] is updated accordingly.

 */

interface MutableDragOffsetGestureContext : GestureContext {

    /** The gesture distance of the current gesture, in pixels. */

    override var dragOffset: Float

}



/** [GestureContext] implementation for manually set values. */

class ProvidedGestureContext(direction: InputDirection, dragOffset: Float) : GestureContext {

class ProvidedGestureContext(dragOffset: Float, direction: InputDirection) :

    MutableDragOffsetGestureContext {

    override var direction by mutableStateOf(direction)

    override var dragOffset by mutableFloatStateOf(dragOffset)

}
@@ -79,7 +90,7 @@ class DistanceGestureContext( 
    initialDragOffset: Float,

    initialDirection: InputDirection,

    directionChangeSlop: Float,

) : GestureContext {

) : MutableDragOffsetGestureContext {

    init {

        require(directionChangeSlop > 0) {

            "directionChangeSlop must be greater than 0, was $directionChangeSlop"