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package ca.allanwang.kau.dialogs.color
import android.animation.Animator
import android.animation.AnimatorListenerAdapter
import android.animation.ValueAnimator
import android.content.Context
import android.content.res.ColorStateList
import android.graphics.Canvas
import android.graphics.Color
import android.graphics.Paint
import android.graphics.Rect
import android.graphics.drawable.Drawable
import android.graphics.drawable.RippleDrawable
import android.graphics.drawable.ShapeDrawable
import android.graphics.drawable.StateListDrawable
import android.graphics.drawable.shapes.OvalShape
import android.os.Build
import android.support.annotation.ColorInt
import android.support.annotation.ColorRes
import android.support.annotation.FloatRange
import android.support.v4.view.GravityCompat
import android.support.v4.view.ViewCompat
import android.util.AttributeSet
import android.view.Gravity
import android.widget.FrameLayout
import android.widget.Toast
import ca.allanwang.kau.utils.color
import ca.allanwang.kau.utils.getDip
import ca.allanwang.kau.utils.toColor
import ca.allanwang.kau.utils.toHSV
/**
* Created by Allan Wang on 2017-06-10.
*
* An extension of MaterialDialog's CircleView with animation selection
* [https://github.com/afollestad/material-dialogs/blob/master/commons/src/main/java/com/afollestad/materialdialogs/color/CircleView.java]
*/
class CircleView @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0) : FrameLayout(context, attrs, defStyleAttr) {
private val borderWidthSmall: Float = context.getDip(3f)
private val borderWidthLarge: Float = context.getDip(5f)
private var whiteOuterBound: Float = borderWidthLarge
private val outerPaint: Paint = Paint().apply { isAntiAlias = true }
private val whitePaint: Paint = Paint().apply { isAntiAlias = true; color = Color.WHITE }
private val innerPaint: Paint = Paint().apply { isAntiAlias = true }
private var selected: Boolean = false
init {
update(Color.DKGRAY)
setWillNotDraw(false)
}
private fun update(@ColorInt color: Int) {
innerPaint.color = color
outerPaint.color = shiftColorDown(color)
val selector = createSelector(color)
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
val states = arrayOf(intArrayOf(android.R.attr.state_pressed))
val colors = intArrayOf(shiftColorUp(color))
val rippleColors = ColorStateList(states, colors)
foreground = RippleDrawable(rippleColors, selector, null)
} else {
foreground = selector
}
}
override fun setBackgroundColor(@ColorInt color: Int) {
update(color)
requestLayout()
invalidate()
}
override fun setBackgroundResource(@ColorRes color: Int) {
setBackgroundColor(context.color(color))
}
@Deprecated("")
override fun setBackground(background: Drawable) {
throw IllegalStateException("Cannot use setBackground() on CircleView.")
}
@Deprecated("")
override fun setBackgroundDrawable(background: Drawable) {
throw IllegalStateException("Cannot use setBackgroundDrawable() on CircleView.")
}
@Deprecated("")
override fun setActivated(activated: Boolean) {
throw IllegalStateException("Cannot use setActivated() on CircleView.")
}
override fun setSelected(selected: Boolean) {
this.selected = selected
whiteOuterBound = borderWidthLarge
invalidate()
}
fun animateSelected(selected: Boolean) {
if (this.selected == selected) return
this.selected = true // We need to draw the other bands
val range = if (selected) Pair(-borderWidthSmall, borderWidthLarge) else Pair(borderWidthLarge, -borderWidthSmall)
val animator = ValueAnimator.ofFloat(range.first, range.second)
with(animator) {
reverse()
duration = 150L
addUpdateListener { animation ->
whiteOuterBound = animation.animatedValue as Float
invalidate()
}
addListener(object : AnimatorListenerAdapter() {
override fun onAnimationEnd(animation: Animator) {
this@CircleView.selected = selected
}
override fun onAnimationCancel(animation: Animator) {
this@CircleView.selected = selected
}
})
start()
}
}
override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
super.onMeasure(widthMeasureSpec, widthMeasureSpec)
setMeasuredDimension(measuredWidth, measuredWidth)
}
override fun onDraw(canvas: Canvas) {
super.onDraw(canvas)
val centerWidth = (measuredWidth / 2).toFloat()
val centerHeight = (measuredHeight / 2).toFloat()
if (selected) {
val whiteRadius = centerWidth - whiteOuterBound
val innerRadius = whiteRadius - borderWidthSmall
if (whiteRadius >= centerWidth) {
canvas.drawCircle(centerWidth, centerHeight, centerWidth, whitePaint)
} else {
canvas.drawCircle(centerWidth, centerHeight, centerWidth, outerPaint)
canvas.drawCircle(centerWidth, centerHeight, whiteRadius, whitePaint)
}
canvas.drawCircle(centerWidth, centerHeight, innerRadius, innerPaint)
} else {
canvas.drawCircle(centerWidth, centerHeight, centerWidth, innerPaint)
}
}
private fun createSelector(color: Int): Drawable {
val darkerCircle = ShapeDrawable(OvalShape())
darkerCircle.paint.color = translucentColor(shiftColorUp(color))
val stateListDrawable = StateListDrawable()
stateListDrawable.addState(intArrayOf(android.R.attr.state_pressed), darkerCircle)
return stateListDrawable
}
fun showHint(color: Int) {
val screenPos = IntArray(2)
val displayFrame = Rect()
getLocationOnScreen(screenPos)
getWindowVisibleDisplayFrame(displayFrame)
val context = context
val width = width
val height = height
val midy = screenPos[1] + height / 2
var referenceX = screenPos[0] + width / 2
if (ViewCompat.getLayoutDirection(this) == ViewCompat.LAYOUT_DIRECTION_LTR) {
val screenWidth = context.resources.displayMetrics.widthPixels
referenceX = screenWidth - referenceX // mirror
}
val cheatSheet = Toast
.makeText(context, String.format("#%06X", 0xFFFFFF and color), Toast.LENGTH_SHORT)
if (midy < displayFrame.height()) {
// Show along the top; follow action buttons
cheatSheet.setGravity(Gravity.TOP or GravityCompat.END, referenceX,
screenPos[1] + height - displayFrame.top)
} else {
// Show along the bottom center
cheatSheet.setGravity(Gravity.BOTTOM or Gravity.CENTER_HORIZONTAL, 0, height)
}
cheatSheet.show()
}
companion object {
@ColorInt
private fun translucentColor(color: Int): Int {
val factor = 0.7f
val alpha = Math.round(Color.alpha(color) * factor)
val red = Color.red(color)
val green = Color.green(color)
val blue = Color.blue(color)
return Color.argb(alpha, red, green, blue)
}
@ColorInt
fun shiftColor(@ColorInt color: Int,
@FloatRange(from = 0.0, to = 2.0) by: Float): Int {
if (by == 1f) return color
val hsv = color.toHSV()
hsv[2] *= by // value component
return hsv.toColor()
}
@ColorInt
fun shiftColorDown(@ColorInt color: Int): Int = shiftColor(color, 0.9f)
@ColorInt
fun shiftColorUp(@ColorInt color: Int): Int = shiftColor(color, 1.1f)
}
}
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