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Project: platform/frameworks/support
Branch: androidx-main
commit b6c7c78f9e7476b468dafe9d5f7dec6794d47f09
Author: Shahd AbuDaghash <shahddaghash@google.com>
Date: Mon Nov 27 11:16:51 2023
Introduce DecayAnimation in AnchoredDraggable
Decay animation allows more realistic settling of a component. This is performed by now passing a `DecayAnimationSpec` parameter to AnchoredDraggable and using it when animating to the target. The new animation implementation will be added in a chain CL.
Bug: 288084801
Test: Tests will be added in a chain CL
Relnote: This change adds a `decayAnimationSpec` parameter to AnchoredDraggable allowing to use decay animation when settling to one of the anchors. The change also includes renaming the existing `animationSpec` to `snapAnimationSpec` to help understanding the use case of each spec.
Change-Id: I44ccd408d919328fd6504d31d8db59cf1d07de43
M compose/foundation/foundation/api/current.txt
M compose/foundation/foundation/api/restricted_current.txt
M compose/foundation/foundation/samples/src/main/java/androidx/compose/foundation/samples/AnchoredDraggableSample.kt
M compose/foundation/foundation/src/androidInstrumentedTest/kotlin/androidx/compose/foundation/anchoredDraggable/AnchoredDraggableGestureTest.kt
M compose/foundation/foundation/src/androidInstrumentedTest/kotlin/androidx/compose/foundation/anchoredDraggable/AnchoredDraggableStateTest.kt
M compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/gestures/AnchoredDraggable.kt
https://android-review.googlesource.com/2847074
Branch: androidx-main
commit b6c7c78f9e7476b468dafe9d5f7dec6794d47f09
Author: Shahd AbuDaghash <shahddaghash@google.com>
Date: Mon Nov 27 11:16:51 2023
Introduce DecayAnimation in AnchoredDraggable
Decay animation allows more realistic settling of a component. This is performed by now passing a `DecayAnimationSpec` parameter to AnchoredDraggable and using it when animating to the target. The new animation implementation will be added in a chain CL.
Bug: 288084801
Test: Tests will be added in a chain CL
Relnote: This change adds a `decayAnimationSpec` parameter to AnchoredDraggable allowing to use decay animation when settling to one of the anchors. The change also includes renaming the existing `animationSpec` to `snapAnimationSpec` to help understanding the use case of each spec.
Change-Id: I44ccd408d919328fd6504d31d8db59cf1d07de43
M compose/foundation/foundation/api/current.txt
M compose/foundation/foundation/api/restricted_current.txt
M compose/foundation/foundation/samples/src/main/java/androidx/compose/foundation/samples/AnchoredDraggableSample.kt
M compose/foundation/foundation/src/androidInstrumentedTest/kotlin/androidx/compose/foundation/anchoredDraggable/AnchoredDraggableGestureTest.kt
M compose/foundation/foundation/src/androidInstrumentedTest/kotlin/androidx/compose/foundation/anchoredDraggable/AnchoredDraggableStateTest.kt
M compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/gestures/AnchoredDraggable.kt
Description
Screencast is attached
Conditions:
Support library version: com.android.support:transition:24.2.0
Android version: any below API 19 KitKat
Lets say we have a view with 0.5 alpha. And applying Fade to hide it. It will animate from 1 to 0 instead of 0.5 to 1. And when we will show it again it will animate from 0 to 1 instead of from 0 to 0.5. In framework transitions it works fine because of new transitionAlpha property.
I've already fixed it in my backport library
We just need to precalculate it properly.
final float curAlpha = view.getAlpha();
startAlpha = curAlpha * startAlpha;
endAlpha = curAlpha * endAlpha;
Where initially startAlpha and endAlpha is a pair of 0 and 1 or 1 and 0.