Add enabled parameter to Modifier.nestedDraggable() (a3116a93) · Commits · e / os / android_frameworks_base

packages/SystemUI/compose/core/src/com/android/compose/gesture/NestedDraggable.kt

+16 −3

Original line number	Diff line number	Diff line
		@@ -111,22 +111,24 @@ fun Modifier.nestedDraggable(
		draggable: NestedDraggable,
		orientation: Orientation,
		overscrollEffect: OverscrollEffect? = null,
		enabled: Boolean = true,
		): Modifier {
		return this.thenIf(overscrollEffect != null) { Modifier.overscroll(overscrollEffect) }
		.then(NestedDraggableElement(draggable, orientation, overscrollEffect))
		.then(NestedDraggableElement(draggable, orientation, overscrollEffect, enabled))
		}

		private data class NestedDraggableElement(
		private val draggable: NestedDraggable,
		private val orientation: Orientation,
		private val overscrollEffect: OverscrollEffect?,
		private val enabled: Boolean,
		) : ModifierNodeElement<NestedDraggableNode>() {
		override fun create(): NestedDraggableNode {
		return NestedDraggableNode(draggable, orientation, overscrollEffect)
		return NestedDraggableNode(draggable, orientation, overscrollEffect, enabled)
		}

		override fun update(node: NestedDraggableNode) {
		node.update(draggable, orientation, overscrollEffect)
		node.update(draggable, orientation, overscrollEffect, enabled)
		}
		}

		@@ -134,6 +136,7 @@ private class NestedDraggableNode(
		private var draggable: NestedDraggable,
		override var orientation: Orientation,
		private var overscrollEffect: OverscrollEffect?,
		private var enabled: Boolean,
		) :
		DelegatingNode(),
		PointerInputModifierNode,
		@@ -179,14 +182,22 @@ private class NestedDraggableNode(
		draggable: NestedDraggable,
		orientation: Orientation,
		overscrollEffect: OverscrollEffect?,
		enabled: Boolean,
		) {
		this.draggable = draggable
		this.orientation = orientation
		this.overscrollEffect = overscrollEffect
		this.enabled = enabled

		trackDownPositionDelegate?.resetPointerInputHandler()
		detectDragsDelegate?.resetPointerInputHandler()
		nestedScrollController?.ensureOnDragStoppedIsCalled()

		if (!enabled && trackDownPositionDelegate != null) {
		check(detectDragsDelegate != null)
		trackDownPositionDelegate = null
		detectDragsDelegate = null
		}
		}

		override fun onPointerEvent(
		@@ -194,6 +205,8 @@ private class NestedDraggableNode(
		pass: PointerEventPass,
		bounds: IntSize,
		) {
		if (!enabled) return

		if (trackDownPositionDelegate == null) {
		check(detectDragsDelegate == null)
		trackDownPositionDelegate = SuspendingPointerInputModifierNode { trackDownPosition() }

packages/SystemUI/compose/core/tests/src/com/android/compose/gesture/NestedDraggableTest.kt

+39 −0

Original line number	Diff line number	Diff line
		@@ -344,6 +344,45 @@ class NestedDraggableTest(override val orientation: Orientation) : OrientationAw
		assertThat(draggable.onDragStoppedCalled).isTrue()
		}

		@Test
		fun enabled() {
		val draggable = TestDraggable()
		var enabled by mutableStateOf(false)
		val touchSlop =
		rule.setContentWithTouchSlop {
		Box(
		Modifier.fillMaxSize()
		.nestedDraggable(draggable, orientation, enabled = enabled)
		)
		}

		assertThat(draggable.onDragStartedCalled).isFalse()

		rule.onRoot().performTouchInput {
		down(center)
		moveBy(touchSlop.toOffset())
		}

		assertThat(draggable.onDragStartedCalled).isFalse()
		assertThat(draggable.onDragStoppedCalled).isFalse()

		enabled = true
		rule.onRoot().performTouchInput {
		// Release previously up finger.
		up()

		down(center)
		moveBy(touchSlop.toOffset())
		}

		assertThat(draggable.onDragStartedCalled).isTrue()
		assertThat(draggable.onDragStoppedCalled).isFalse()

		enabled = false
		rule.waitForIdle()
		assertThat(draggable.onDragStoppedCalled).isTrue()
		}

		private fun ComposeContentTestRule.setContentWithTouchSlop(
		content: @Composable () -> Unit
		): Float {