Animate changes between action icons. (9f8c5c6b) · Commits · e / os / android_frameworks_base

packages/SystemUI/src/com/android/systemui/screenshot/ui/TransitioningIconDrawable.kt

0 → 100644

+134 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2024 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package com.android.systemui.screenshot.ui

		import android.animation.ValueAnimator
		import android.content.res.ColorStateList
		import android.graphics.Canvas
		import android.graphics.ColorFilter
		import android.graphics.drawable.Drawable
		import androidx.core.animation.doOnEnd
		import java.util.Objects

		/** */
		class TransitioningIconDrawable : Drawable() {
		// The drawable for the current icon of this view. During icon transitions, this is the one
		// being animated out.
		private var drawable: Drawable? = null

		// The incoming new icon. Only populated during transition animations (when drawable is also
		// non-null).
		private var enteringDrawable: Drawable? = null
		private var colorFilter: ColorFilter? = null
		private var tint: ColorStateList? = null
		private var alpha = 255

		private var transitionAnimator =
		ValueAnimator.ofFloat(0f, 1f).also { it.doOnEnd { onTransitionComplete() } }

		/**
		* Set the drawable to be displayed, potentially animating the transition from one icon to the
		* next.
		*/
		fun setIcon(incomingDrawable: Drawable?) {
		if (Objects.equals(drawable, incomingDrawable) && !transitionAnimator.isRunning) {
		return
		}

		incomingDrawable?.colorFilter = colorFilter
		incomingDrawable?.setTintList(tint)

		if (drawable == null) {
		// No existing icon drawn, just show the new one without a transition
		drawable = incomingDrawable
		invalidateSelf()
		return
		}

		if (enteringDrawable != null) {
		// There's already an entrance animation happening, just update the entering icon, not
		// maintaining a queue or anything.
		enteringDrawable = incomingDrawable
		return
		}

		// There was already an icon, need to animate between icons.
		enteringDrawable = incomingDrawable
		transitionAnimator.setCurrentFraction(0f)
		transitionAnimator.start()
		invalidateSelf()
		}

		override fun draw(canvas: Canvas) {
		// Scale the old one down, scale the new one up.
		drawable?.let {
		val scale =
		if (transitionAnimator.isRunning) {
		1f - transitionAnimator.animatedFraction
		} else {
		1f
		}
		drawScaledDrawable(it, canvas, scale)
		}
		enteringDrawable?.let {
		val scale = transitionAnimator.animatedFraction
		drawScaledDrawable(it, canvas, scale)
		}

		if (transitionAnimator.isRunning) {
		invalidateSelf()
		}
		}

		private fun drawScaledDrawable(drawable: Drawable, canvas: Canvas, scale: Float) {
		drawable.bounds = getBounds()
		canvas.save()
		canvas.scale(
		scale,
		scale,
		(drawable.intrinsicWidth / 2).toFloat(),
		(drawable.intrinsicHeight / 2).toFloat()
		)
		drawable.draw(canvas)
		canvas.restore()
		}

		private fun onTransitionComplete() {
		drawable = enteringDrawable
		enteringDrawable = null
		invalidateSelf()
		}

		override fun setTintList(tint: ColorStateList?) {
		super.setTintList(tint)
		drawable?.setTintList(tint)
		enteringDrawable?.setTintList(tint)
		this.tint = tint
		}

		override fun setAlpha(alpha: Int) {
		this.alpha = alpha
		}

		override fun setColorFilter(colorFilter: ColorFilter?) {
		this.colorFilter = colorFilter
		drawable?.colorFilter = colorFilter
		enteringDrawable?.colorFilter = colorFilter
		}

		override fun getOpacity(): Int = alpha
		}

packages/SystemUI/src/com/android/systemui/screenshot/ui/binder/ActionButtonViewBinder.kt

+8 −1

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		@@ -21,6 +21,7 @@ import android.widget.ImageView
		import android.widget.LinearLayout
		import android.widget.TextView
		import com.android.systemui.res.R
		import com.android.systemui.screenshot.ui.TransitioningIconDrawable
		import com.android.systemui.screenshot.ui.viewmodel.ActionButtonViewModel

		object ActionButtonViewBinder {
		@@ -28,7 +29,13 @@ object ActionButtonViewBinder {
		fun bind(view: View, viewModel: ActionButtonViewModel) {
		val iconView = view.requireViewById<ImageView>(R.id.overlay_action_chip_icon)
		val textView = view.requireViewById<TextView>(R.id.overlay_action_chip_text)
		iconView.setImageDrawable(viewModel.appearance.icon)
		if (iconView.drawable == null) {
		iconView.setImageDrawable(TransitioningIconDrawable())
		}
		val drawable = iconView.drawable as? TransitioningIconDrawable
		// Note we never re-bind a view to a different ActionButtonViewModel, different view
		// models would remove/create separate views.
		drawable?.setIcon(viewModel.appearance.icon)
		textView.text = viewModel.appearance.label
		setMargins(iconView, textView, viewModel.appearance.label?.isNotEmpty() ?: false)
		if (viewModel.onClicked != null) {