1 /*
2  * Copyright (C) 2024 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.wallpaper.picker.option.ui.view
18 
19 import android.animation.ArgbEvaluator
20 import android.content.Context
21 import android.graphics.Canvas
22 import android.graphics.Paint
23 import android.util.AttributeSet
24 import android.view.View
25 import com.android.wallpaper.R
26 
27 open class OptionItemBackground
28 @JvmOverloads
29 constructor(context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0) :
30     View(context, attrs, defStyleAttr) {
31 
32     private val colorUnselected =
33         context.resources.getColor(R.color.system_surface_container_high, null)
34     private val colorSelected = context.resources.getColor(R.color.system_primary, null)
35     private val argbEvaluator = ArgbEvaluator()
<lambda>null36     private val paint = Paint(Paint.ANTI_ALIAS_FLAG).apply { style = Paint.Style.FILL }
37 
38     // progress 0 is unselected and 1 is selected
39     var progress = 0f
40         private set
41 
setProgressnull42     fun setProgress(progress: Float) {
43         this.progress = progress
44         invalidate()
45     }
46 
onDrawnull47     override fun onDraw(canvas: Canvas) {
48         super.onDraw(canvas)
49 
50         val width = width.toFloat()
51         val height = height.toFloat()
52         val cornerRadius = (width / 2) * (1f - 0.25f * progress)
53         paint.color = argbEvaluator.evaluate(progress, colorUnselected, colorSelected) as Int
54 
55         canvas.drawRoundRect(0f, 0f, width, height, cornerRadius, cornerRadius, paint)
56     }
57 }
58