Update placeholders
parent
34903fc951
commit
820d3f2413
GPG Key ID:
676DEE768C17A9D7
@ -0,0 +1,81 @@
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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.ColorFilter
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import android.graphics.PixelFormat
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import android.graphics.drawable.Animatable
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import android.graphics.drawable.Drawable
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import android.view.animation.AccelerateDecelerateInterpolator
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import androidx.core.graphics.ColorUtils
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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 org.koitharu.kotatsu.core.util.ext.getThemeColor
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import kotlin.math.abs
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import com.google.android.material.R as materialR
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class AnimatedPlaceholderDrawable(context: Context) : Drawable(), Animatable, TimeAnimator.TimeListener {
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private val colorLow = context.getThemeColor(materialR.attr.colorSurfaceContainerLow)
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private val colorHigh = context.getThemeColor(materialR.attr.colorSurfaceContainerHigh)
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private var currentColor: Int = colorLow
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private var alpha: Int = 255
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private val interpolator = FastOutSlowInInterpolator()
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private val period = 2000
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private val timeAnimator = TimeAnimator()
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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) {
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updateColor()
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start()
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}
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canvas.drawColor(currentColor)
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}
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override fun setAlpha(alpha: Int) {
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this.alpha = alpha
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}
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override fun setColorFilter(colorFilter: ColorFilter?) {
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throw UnsupportedOperationException("ColorFilter is not supported by PlaceholderDrawable")
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}
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@Deprecated("Deprecated in Java")
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override fun getOpacity(): Int = PixelFormat.OPAQUE
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override fun getAlpha(): Int = alpha
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override fun onTimeUpdate(animation: TimeAnimator?, totalTime: Long, deltaTime: Long) {
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if (callback != null) {
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updateColor()
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invalidateSelf()
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}
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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.cancel()
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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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val ph = period / 2
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val fraction = abs((System.currentTimeMillis() % period) - ph) / ph.toFloat()
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var color = ArgbEvaluatorCompat.getInstance()
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.evaluate(interpolator.getInterpolation(fraction), colorLow, colorHigh)
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if (alpha != 255) {
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color = ColorUtils.setAlphaComponent(color, alpha)
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}
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currentColor = color
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}
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}
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