diff options
Diffstat (limited to 'colorpicker/src/main/kotlin/ca/allanwang/kau/colorpicker/CircleView.kt')
| -rw-r--r-- | colorpicker/src/main/kotlin/ca/allanwang/kau/colorpicker/CircleView.kt | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/colorpicker/src/main/kotlin/ca/allanwang/kau/colorpicker/CircleView.kt b/colorpicker/src/main/kotlin/ca/allanwang/kau/colorpicker/CircleView.kt new file mode 100644 index 0000000..04b26cb --- /dev/null +++ b/colorpicker/src/main/kotlin/ca/allanwang/kau/colorpicker/CircleView.kt @@ -0,0 +1,228 @@ +package ca.allanwang.kau.colorpicker + +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 borderWidthMicro: Float = context.getDip(1f) + 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 + var withBorder: Boolean = false + get() = field + set(value) { + if (field != value) { + field = value + invalidate() + } + } + + 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 (withBorder) canvas.drawCircle(centerWidth, centerHeight, centerWidth, whitePaint) + if (selected) { + val whiteRadius = centerWidth - whiteOuterBound + val innerRadius = whiteRadius - borderWidthSmall + if (whiteRadius >= centerWidth) { + canvas.drawCircle(centerWidth, centerHeight, centerWidth, whitePaint) + } else { + canvas.drawCircle(centerWidth, centerHeight, if (withBorder) centerWidth - borderWidthMicro else centerWidth, outerPaint) + canvas.drawCircle(centerWidth, centerHeight, whiteRadius, whitePaint) + } + canvas.drawCircle(centerWidth, centerHeight, innerRadius, innerPaint) + } else { + canvas.drawCircle(centerWidth, centerHeight, if (withBorder) centerWidth - borderWidthMicro else 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 + @JvmStatic + 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 + @JvmStatic + 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 + @JvmStatic + fun shiftColorDown(@ColorInt color: Int): Int = shiftColor(color, 0.9f) + + @ColorInt + @JvmStatic + fun shiftColorUp(@ColorInt color: Int): Int = shiftColor(color, 1.1f) + } +}
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