diff options
Diffstat (limited to 'ui/src/main/java/com/wireguard/android/widget/SlashDrawable.kt')
| -rw-r--r-- | ui/src/main/java/com/wireguard/android/widget/SlashDrawable.kt | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/ui/src/main/java/com/wireguard/android/widget/SlashDrawable.kt b/ui/src/main/java/com/wireguard/android/widget/SlashDrawable.kt new file mode 100644 index 00000000..a93e35f5 --- /dev/null +++ b/ui/src/main/java/com/wireguard/android/widget/SlashDrawable.kt @@ -0,0 +1,174 @@ +/* + * Copyright © 2018 The Android Open Source Project + * Copyright © 2018-2019 WireGuard LLC. All Rights Reserved. + * SPDX-License-Identifier: Apache-2.0 + */ +package com.wireguard.android.widget + +import android.animation.ObjectAnimator +import android.animation.ValueAnimator +import android.content.res.ColorStateList +import android.graphics.* +import android.graphics.drawable.Drawable +import android.os.Build +import android.util.FloatProperty +import android.util.Property +import androidx.annotation.ColorInt +import androidx.annotation.IntRange +import androidx.annotation.RequiresApi + +@RequiresApi(Build.VERSION_CODES.N) +class SlashDrawable(private val mDrawable: Drawable) : Drawable() { + private val mPaint = Paint(Paint.ANTI_ALIAS_FLAG) + private val mPath = Path() + private val mSlashRect = RectF() + private var mAnimationEnabled = true + // Animate this value on change + private var mCurrentSlashLength = 0f + private var mRotation = 0f + private var mSlashed = false + + override fun draw(canvas: Canvas) { + canvas.save() + val m = Matrix() + val width = bounds.width() + val height = bounds.height() + val radiusX = scale(CORNER_RADIUS, width) + val radiusY = scale(CORNER_RADIUS, height) + updateRect( + scale(LEFT, width), + scale(TOP, height), + scale(RIGHT, width), + scale(TOP + mCurrentSlashLength, height) + ) + mPath.reset() + // Draw the slash vertically + mPath.addRoundRect(mSlashRect, radiusX, radiusY, Path.Direction.CW) + // Rotate -45 + desired rotation + m.setRotate(mRotation + DEFAULT_ROTATION, width / 2f, height / 2f) + mPath.transform(m) + canvas.drawPath(mPath, mPaint) + + // Rotate back to vertical + m.setRotate(-mRotation - DEFAULT_ROTATION, width / 2f, height / 2f) + mPath.transform(m) + + // Draw another rect right next to the first, for clipping + m.setTranslate(mSlashRect.width(), 0f) + mPath.transform(m) + mPath.addRoundRect(mSlashRect, 1f * width, 1f * height, Path.Direction.CW) + m.setRotate(mRotation + DEFAULT_ROTATION, width / 2f, height / 2f) + mPath.transform(m) + if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) canvas.clipPath(mPath, Region.Op.DIFFERENCE) else canvas.clipOutPath(mPath) + mDrawable.draw(canvas) + canvas.restore() + } + + override fun getIntrinsicHeight() = mDrawable.intrinsicHeight + + override fun getIntrinsicWidth() = mDrawable.intrinsicWidth + + override fun getOpacity() = PixelFormat.OPAQUE + + override fun onBoundsChange(bounds: Rect) { + super.onBoundsChange(bounds) + mDrawable.bounds = bounds + } + + private fun scale(frac: Float, width: Int) = frac * width + + override fun setAlpha(@IntRange(from = 0, to = 255) alpha: Int) { + mDrawable.alpha = alpha + mPaint.alpha = alpha + } + + fun setAnimationEnabled(enabled: Boolean) { + mAnimationEnabled = enabled + } + + override fun setColorFilter(colorFilter: ColorFilter?) { + mDrawable.colorFilter = colorFilter + mPaint.colorFilter = colorFilter + } + + private fun setDrawableTintList(tint: ColorStateList?) { + mDrawable.setTintList(tint) + } + + fun setRotation(rotation: Float) { + if (mRotation == rotation) return + mRotation = rotation + invalidateSelf() + } + + fun setSlashed(slashed: Boolean) { + if (mSlashed == slashed) return + mSlashed = slashed + val end = if (mSlashed) SLASH_HEIGHT / SCALE else 0f + val start = if (mSlashed) 0f else SLASH_HEIGHT / SCALE + if (mAnimationEnabled) { + val anim = ObjectAnimator.ofFloat(this, mSlashLengthProp, start, end) + anim.addUpdateListener { _ -> invalidateSelf() } + anim.duration = QS_ANIM_LENGTH + anim.start() + } else { + mCurrentSlashLength = end + invalidateSelf() + } + } + + override fun setTint(@ColorInt tintColor: Int) { + super.setTint(tintColor) + mDrawable.setTint(tintColor) + mPaint.color = tintColor + } + + override fun setTintList(tint: ColorStateList?) { + super.setTintList(tint) + setDrawableTintList(tint) + mPaint.color = tint?.defaultColor ?: 0 + invalidateSelf() + } + + override fun setTintMode(tintMode: PorterDuff.Mode?) { + super.setTintMode(tintMode) + mDrawable.setTintMode(tintMode) + } + + private fun updateRect(left: Float, top: Float, right: Float, bottom: Float) { + mSlashRect.left = left + mSlashRect.top = top + mSlashRect.right = right + mSlashRect.bottom = bottom + } + + companion object { + private const val CENTER_X = 10.65f + private const val CENTER_Y = 11.869239f + private val CORNER_RADIUS = if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) 0f else 1f + + // Draw the slash washington-monument style; rotate to no-u-turn style + private const val DEFAULT_ROTATION = -45f + private const val QS_ANIM_LENGTH: Long = 350 + private const val SCALE = 24f + private const val SLASH_HEIGHT = 28f + + // These values are derived in un-rotated (vertical) orientation + private const val SLASH_WIDTH = 1.8384776f + + // Bottom is derived during animation + private const val LEFT = (CENTER_X - SLASH_WIDTH / 2) / SCALE + private const val RIGHT = (CENTER_X + SLASH_WIDTH / 2) / SCALE + private const val TOP = (CENTER_Y - SLASH_HEIGHT / 2) / SCALE + private val mSlashLengthProp: FloatProperty<SlashDrawable> = object : FloatProperty<SlashDrawable>("slashLength") { + override fun get(obj: SlashDrawable): Float { + return obj.mCurrentSlashLength + } + + override fun setValue(obj: SlashDrawable, value: Float) { + obj.mCurrentSlashLength = value + } + } + } + +} |