lebonprix.apk/java/io/xdrm/lebonprix/anim/ResultOpeningAnimation.kt

75 lines
2.1 KiB
Kotlin
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2018-12-15 11:17:28 +00:00
package io.xdrm.lebonprix.anim
import android.content.Context
import android.graphics.*
import android.support.v4.content.res.ResourcesCompat
import android.view.animation.Animation
import android.view.animation.Transformation
import android.widget.ImageView
import io.xdrm.lebonprix.R
class ResultOpeningAnimation(
val ctx: Context,
val target: ImageView
) : Animation() {
// VARIABLES
private var width: Int = 1000
private var height: Int = 1000
private var bitmap : Bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
private var canvas : Canvas = Canvas(bitmap)
private var progress: Float = 0F
init {
target.addOnLayoutChangeListener { v, left, top, right, bottom, oldLeft, oldTop, oldRight, oldBottom ->
width = right-left
height = bottom-top
// unregister previous
target.setImageBitmap(null)
canvas.setBitmap(null)
bitmap.recycle()
// build new
bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
canvas = Canvas(bitmap)
target.setImageBitmap(bitmap)
}
}
override fun start() {
target.startAnimation(this)
}
override fun applyTransformation(interpolatedTime: Float, t: Transformation?) {
super.applyTransformation(interpolatedTime, t)
progress = interpolatedTime
draw()
}
private fun draw(){
canvas.drawColor(Color.TRANSPARENT, PorterDuff.Mode.CLEAR)
drawFilter()
target.setImageBitmap(bitmap)
}
private fun drawFilter(){
val bg = Paint()
bg.color = ResourcesCompat.getColor(ctx.resources, R.color.colorBackground, null)
// max radius to hide the whole screen
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
var rad = (1F-progress) * maxRad
// centered
val x = width.toFloat() / 2F
val y = height.toFloat() / 2F
canvas.drawCircle(x, y, rad.toFloat(), bg)
}
}