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/*
* Copyright (C) 2023 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.launcher3.taskbar.bubbles
import android.graphics.Canvas
import android.graphics.Color
import android.graphics.ColorFilter
import android.graphics.Paint
import android.graphics.drawable.Drawable
import android.graphics.drawable.ShapeDrawable
import com.android.launcher3.R
import com.android.launcher3.Utilities
import com.android.launcher3.Utilities.mapToRange
import com.android.launcher3.anim.Interpolators
import com.android.launcher3.icons.GraphicsUtils.setColorAlphaBound
import com.android.launcher3.taskbar.TaskbarActivityContext
import com.android.wm.shell.common.TriangleShape
/** Drawable for the background of the bubble bar. */
class BubbleBarBackground(context: TaskbarActivityContext, private val backgroundHeight: Float) :
Drawable() {
private val DARK_THEME_SHADOW_ALPHA = 51f
private val LIGHT_THEME_SHADOW_ALPHA = 25f
private val paint: Paint = Paint()
private val pointerSize: Float
private val shadowAlpha: Float
private var shadowBlur = 0f
private var keyShadowDistance = 0f
var arrowPositionX: Float = 0f
private set
private var showingArrow: Boolean = false
private var arrowDrawable: ShapeDrawable
init {
paint.color = context.getColor(R.color.taskbar_background)
paint.flags = Paint.ANTI_ALIAS_FLAG
paint.style = Paint.Style.FILL
val res = context.resources
shadowBlur = res.getDimension(R.dimen.transient_taskbar_shadow_blur)
keyShadowDistance = res.getDimension(R.dimen.transient_taskbar_key_shadow_distance)
pointerSize = res.getDimension(R.dimen.bubblebar_pointer_size)
shadowAlpha =
if (Utilities.isDarkTheme(context)) DARK_THEME_SHADOW_ALPHA
else LIGHT_THEME_SHADOW_ALPHA
arrowDrawable =
ShapeDrawable(TriangleShape.create(pointerSize, pointerSize, /* pointUp= */ true))
arrowDrawable.setBounds(0, 0, pointerSize.toInt(), pointerSize.toInt())
arrowDrawable.paint.flags = Paint.ANTI_ALIAS_FLAG
arrowDrawable.paint.style = Paint.Style.FILL
arrowDrawable.paint.color = context.getColor(R.color.taskbar_background)
}
fun showArrow(show: Boolean) {
showingArrow = show
}
fun setArrowPosition(x: Float) {
arrowPositionX = x
}
/** Draws the background with the given paint and height, on the provided canvas. */
override fun draw(canvas: Canvas) {
canvas.save()
// TODO (b/277359345): Should animate the alpha similar to taskbar (see TaskbarDragLayer)
// Draw shadows.
val newShadowAlpha =
mapToRange(paint.alpha.toFloat(), 0f, 255f, 0f, shadowAlpha, Interpolators.LINEAR)
paint.setShadowLayer(
shadowBlur,
0f,
keyShadowDistance,
setColorAlphaBound(Color.BLACK, Math.round(newShadowAlpha))
)
arrowDrawable.paint.setShadowLayer(
shadowBlur,
0f,
keyShadowDistance,
setColorAlphaBound(Color.BLACK, Math.round(newShadowAlpha))
)
// Draw background.
val radius = backgroundHeight / 2f
canvas.drawRoundRect(
0f,
0f,
canvas.width.toFloat(),
canvas.height.toFloat(),
radius,
radius,
paint
)
if (showingArrow) {
// Draw arrow.
val transX = arrowPositionX - pointerSize / 2f
canvas.translate(transX, -pointerSize)
arrowDrawable.draw(canvas)
}
canvas.restore()
}
override fun getOpacity(): Int {
return paint.alpha
}
override fun setAlpha(alpha: Int) {
paint.alpha = alpha
}
override fun setColorFilter(colorFilter: ColorFilter?) {
paint.colorFilter = colorFilter
}
}
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