75 lines
2.1 KiB
Kotlin
75 lines
2.1 KiB
Kotlin
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package io.xdrm.lebonprix.anim
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import android.content.Context
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import android.graphics.*
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import android.support.v4.content.res.ResourcesCompat
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import android.view.animation.Animation
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import android.view.animation.Transformation
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import android.widget.ImageView
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import io.xdrm.lebonprix.R
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class ResultOpeningAnimation(
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val ctx: Context,
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val target: ImageView
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) : Animation() {
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// VARIABLES
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private var width: Int = 1000
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private var height: Int = 1000
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private var bitmap : Bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
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private var canvas : Canvas = Canvas(bitmap)
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private var progress: Float = 0F
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init {
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target.addOnLayoutChangeListener { v, left, top, right, bottom, oldLeft, oldTop, oldRight, oldBottom ->
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width = right-left
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height = bottom-top
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// unregister previous
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target.setImageBitmap(null)
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canvas.setBitmap(null)
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bitmap.recycle()
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// build new
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bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
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canvas = Canvas(bitmap)
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target.setImageBitmap(bitmap)
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}
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}
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override fun start() {
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target.startAnimation(this)
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}
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override fun applyTransformation(interpolatedTime: Float, t: Transformation?) {
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super.applyTransformation(interpolatedTime, t)
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progress = interpolatedTime
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draw()
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}
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private fun draw(){
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canvas.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR)
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drawFilter()
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target.setImageBitmap(bitmap)
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}
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private fun drawFilter(){
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val bg = Paint()
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bg.color = ResourcesCompat.getColor(ctx.resources, R.color.colorBackground, null)
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// max radius to hide the whole screen
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val maxRad = Math.sqrt( Math.pow(width.toDouble(),2.toDouble()) + Math.pow(height.toDouble(), 2.toDouble())) * 1.5F // security of 1.5x the max radius
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var rad = (1F-progress) * maxRad
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// centered
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val x = width.toFloat() / 2F
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val y = height.toFloat() / 2F
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canvas.drawCircle(x, y, rad.toFloat(), bg)
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}
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}
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