Animated source placeholder
parent
05b05be0bd
commit
eba1679761
GPG Key ID:
676DEE768C17A9D7
@ -0,0 +1,72 @@
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package org.koitharu.kotatsu.core.ui.image
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import android.animation.TimeAnimator
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import android.content.Context
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import android.graphics.Canvas
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import android.graphics.drawable.Animatable
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import androidx.annotation.StyleRes
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import androidx.interpolator.view.animation.FastOutSlowInInterpolator
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import com.google.android.material.animation.ArgbEvaluatorCompat
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import com.google.android.material.color.MaterialColors
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import org.koitharu.kotatsu.R
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import org.koitharu.kotatsu.core.util.KotatsuColors
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import org.koitharu.kotatsu.core.util.ext.getAnimationDuration
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import kotlin.math.abs
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class AnimatedFaviconDrawable(
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context: Context,
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@StyleRes styleResId: Int,
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name: String,
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) : FaviconDrawable(context, styleResId, name), Animatable, TimeAnimator.TimeListener {
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private val interpolator = FastOutSlowInInterpolator()
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private val period = context.getAnimationDuration(R.integer.config_longAnimTime) * 2
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private val timeAnimator = TimeAnimator()
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private val colorHigh = MaterialColors.harmonize(KotatsuColors.random(name), colorBackground)
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private val colorLow = ArgbEvaluatorCompat.getInstance().evaluate(0.3f, colorHigh, colorBackground)
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init {
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timeAnimator.setTimeListener(this)
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updateColor()
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}
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override fun draw(canvas: Canvas) {
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if (!isRunning && period > 0) {
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updateColor()
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start()
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}
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super.draw(canvas)
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}
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override fun setAlpha(alpha: Int) = Unit
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override fun getAlpha(): Int = 255
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override fun onTimeUpdate(animation: TimeAnimator?, totalTime: Long, deltaTime: Long) {
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callback?.also {
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updateColor()
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it.invalidateDrawable(this)
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} ?: stop()
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}
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override fun start() {
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timeAnimator.start()
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}
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override fun stop() {
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timeAnimator.end()
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}
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override fun isRunning(): Boolean = timeAnimator.isStarted
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private fun updateColor() {
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if (period <= 0f) {
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return
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}
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val ph = period / 2
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val fraction = abs((System.currentTimeMillis() % period) - ph) / ph.toFloat()
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colorForeground = ArgbEvaluatorCompat.getInstance()
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.evaluate(interpolator.getInterpolation(fraction), colorLow, colorHigh)
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}
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}
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