Pointers/PointerEvents don't report pressure [205164819]

Verified

Feature Request

compose-roadmap-proposal

Status Update

No update yet.

Description

jt...@gmail.com

created issue #1

Nov 4, 2021 11:37PM

Description:

Android MotionEvents reports the pressure being applied to the screen by a finger, stylus or other pointer device.

There appears to be no way to get touch pressure in Jetpack Compose without resorting to pointerInteropFilter, which the documentation recommends we don't use and which in any case appears to break when inside a LazyItem scope. (pointerInteropFilter gets very janky, and drops around 90 per cent of events when in something like a LazyColumn.)

It would be nice if androidx.compose.ui.input.pointer or androidx.compose.ui.input.pointer.pointerevent (or indeed anywhere you liked!) contained pressure properties or methods.

Use Case:

Any Jetpack Compose drawing or handwriting app could make use of touch pressure. I imagine games could also benefit from it?

Comments

no...@google.com <no...@google.com> Nov 5, 2021 11:11PM

Assigned to mo...@google.com.

mo...@google.com <mo...@google.com> Apr 5, 2022 04:54PM

Reassigned to je...@google.com.

ap...@google.com <ap...@google.com> #2Jun 28, 2022 03:58PM

Project: platform/frameworks/support
Branch: androidx-main

commit c782265fe41c10491b770f73f79d97d547af8e67
Author: Jeremy Walker <jewalker@google.com>
Date: Thu May 26 10:40:08 2022

Adds more events to Tap Benchmark for testing pressure.

Bug: 205164819
Test: Manually tested.

Change-Id: I0c9e744c18d14876545d8b3b23066018a7c57471

M compose/ui/ui/benchmark/src/androidTest/java/androidx/compose/ui/benchmark/input/pointer/ComposeTapIntegrationBenchmark.kt
A compose/ui/ui/benchmark/src/androidTest/java/androidx/compose/ui/benchmark/input/pointer/ComposePreciseFingerTapIntegrationBenchmark.kt
A compose/ui/ui/benchmark/src/androidTest/java/androidx/compose/ui/benchmark/input/pointer/ComposePreciseStylusTapIntegrationBenchmark.kt

https://android-review.googlesource.com/2108527

ap...@google.com <ap...@google.com> #3Jul 12, 2022 07:37PM

Project: platform/frameworks/support
Branch: androidx-main

commit fe9050830b23ca5cfd09570e167f483e12318473
Author: Jeremy Walker <jewalker@google.com>
Date: Thu May 26 11:18:17 2022

Add pressure to Compose input events.

Bug: 205164819
Test: Manually tested
Relnote: "Added a new property `PointerInputChange#pressure` to retrieve the pressure."

Change-Id: I45a5e8a0097064b01bba449df9e1d455a82e696c

M compose/ui/ui/src/commonMain/kotlin/androidx/compose/ui/input/pointer/PointerInputTestUtil.kt
M compose/ui/ui/integration-tests/ui-demos/src/main/java/androidx/compose/ui/demos/UiDemos.kt
M compose/ui/ui/src/androidMain/kotlin/androidx/compose/ui/input/pointer/MotionEventAdapter.android.kt
M compose/ui/ui/src/androidAndroidTest/kotlin/androidx/compose/ui/input/pointer/TestUtils.kt
A compose/ui/ui/integration-tests/ui-demos/src/main/java/androidx/compose/ui/demos/gestures/TapPressureGestureDetectorDemo.kt
M compose/ui/ui/src/commonMain/kotlin/androidx/compose/ui/input/pointer/SuspendingPointerInputFilter.kt
M compose/ui/ui/src/skikoMain/kotlin/androidx/compose/ui/input/pointer/TestPointerInputEventData.skiko.kt
M compose/ui/ui/src/androidAndroidTest/kotlin/androidx/compose/ui/input/pointer/PointerInputEventProcessorTest.kt
M compose/ui/ui/src/commonMain/kotlin/androidx/compose/ui/input/pointer/PointerInputEventProcessor.kt
M compose/ui/ui/src/commonMain/kotlin/androidx/compose/ui/input/pointer/PointerEvent.kt
M compose/ui/ui/src/desktopMain/kotlin/androidx/compose/ui/ComposeScene.desktop.kt
M compose/ui/ui/src/androidMain/kotlin/androidx/compose/ui/input/pointer/PointerEvent.android.kt
M compose/ui/ui/src/commonMain/kotlin/androidx/compose/ui/input/pointer/InternalPointerInput.kt
M compose/ui/ui/api/public_plus_experimental_current.txt

https://android-review.googlesource.com/2108528

je...@google.com <je...@google.com> #4Jul 12, 2022 07:38PM

Verified by je...@google.com.

Pressure should now be available in the alpha.

Issue 205164819