1 /* 2 * Copyright 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 * https://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.intentresolver.widget 18 19 import android.content.Context 20 import android.graphics.Canvas 21 import android.graphics.Color 22 import android.graphics.Paint 23 import android.util.AttributeSet 24 import android.util.TypedValue 25 import android.view.InputDevice.SOURCE_MOUSE 26 import android.view.MotionEvent 27 import android.view.MotionEvent.ACTION_HOVER_ENTER 28 import android.view.MotionEvent.ACTION_HOVER_MOVE 29 import android.view.View 30 import android.widget.ImageView 31 import android.widget.LinearLayout 32 import com.android.intentresolver.R 33 34 class ChooserTargetItemView( 35 context: Context, 36 attrs: AttributeSet?, 37 defStyleAttr: Int, 38 defStyleRes: Int, 39 ) : LinearLayout(context, attrs, defStyleAttr, defStyleRes) { 40 private val outlineRadius: Float 41 private val outlineWidth: Float 42 private val outlinePaint: Paint = <lambda>null43 Paint(Paint.ANTI_ALIAS_FLAG).apply { style = Paint.Style.STROKE } 44 private val outlineInnerPaint: Paint = <lambda>null45 Paint(Paint.ANTI_ALIAS_FLAG).apply { style = Paint.Style.STROKE } 46 private var iconView: ImageView? = null 47 48 constructor(context: Context) : this(context, null) 49 50 constructor(context: Context, attrs: AttributeSet?) : this(context, attrs, 0) 51 52 constructor( 53 context: Context, 54 attrs: AttributeSet?, 55 defStyleAttr: Int, 56 ) : this(context, attrs, defStyleAttr, 0) 57 58 init { 59 val a = context.obtainStyledAttributes(attrs, R.styleable.ChooserTargetItemView) 60 val defaultWidth = 61 TypedValue.applyDimension( 62 TypedValue.COMPLEX_UNIT_DIP, 63 2f, 64 context.resources.displayMetrics, 65 ) 66 outlineRadius = 67 a.getDimension(R.styleable.ChooserTargetItemView_focusOutlineCornerRadius, 0f) 68 outlineWidth = 69 a.getDimension(R.styleable.ChooserTargetItemView_focusOutlineWidth, defaultWidth) 70 71 outlinePaint.strokeWidth = outlineWidth 72 outlinePaint.color = 73 a.getColor(R.styleable.ChooserTargetItemView_focusOutlineColor, Color.TRANSPARENT) 74 75 outlineInnerPaint.strokeWidth = outlineWidth 76 outlineInnerPaint.color = 77 a.getColor(R.styleable.ChooserTargetItemView_focusInnerOutlineColor, Color.TRANSPARENT) 78 a.recycle() 79 } 80 onViewAddednull81 override fun onViewAdded(child: View) { 82 super.onViewAdded(child) 83 if (child is ImageView) { 84 iconView = child 85 } 86 } 87 onViewRemovednull88 override fun onViewRemoved(child: View?) { 89 super.onViewRemoved(child) 90 if (child === iconView) { 91 iconView = null 92 } 93 } 94 onHoverEventnull95 override fun onHoverEvent(event: MotionEvent): Boolean { 96 val iconView = iconView ?: return false 97 if (!isEnabled) return true 98 when (event.action) { 99 ACTION_HOVER_ENTER -> { 100 iconView.isHovered = true 101 } 102 MotionEvent.ACTION_HOVER_EXIT -> { 103 iconView.isHovered = false 104 } 105 } 106 return true 107 } 108 onInterceptHoverEventnull109 override fun onInterceptHoverEvent(event: MotionEvent) = 110 if (event.isFromSource(SOURCE_MOUSE)) { 111 // This is the same logic as in super.onInterceptHoverEvent (ViewGroup) minus the check 112 // that the pointer fall on the scroll bar as we need to control the hover state of the 113 // icon. 114 // We also want to intercept only MOUSE hover events as the TalkBack's Explore by Touch 115 // (including single taps) reported as a hover event. 116 event.action == ACTION_HOVER_MOVE || event.action == ACTION_HOVER_ENTER 117 } else { 118 super.onInterceptHoverEvent(event) 119 } 120 dispatchDrawnull121 override fun dispatchDraw(canvas: Canvas) { 122 super.dispatchDraw(canvas) 123 if (isFocused) { 124 drawFocusInnerOutline(canvas) 125 drawFocusOutline(canvas) 126 } 127 } 128 drawFocusInnerOutlinenull129 private fun drawFocusInnerOutline(canvas: Canvas) { 130 val outlineOffset = outlineWidth + outlineWidth / 2 131 canvas.drawRoundRect( 132 outlineOffset, 133 outlineOffset, 134 maxOf(0f, width - outlineOffset), 135 maxOf(0f, height - outlineOffset), 136 outlineRadius - outlineWidth, 137 outlineRadius - outlineWidth, 138 outlineInnerPaint, 139 ) 140 } 141 drawFocusOutlinenull142 private fun drawFocusOutline(canvas: Canvas) { 143 val outlineOffset = outlineWidth / 2 144 canvas.drawRoundRect( 145 outlineOffset, 146 outlineOffset, 147 maxOf(0f, width - outlineOffset), 148 maxOf(0f, height - outlineOffset), 149 outlineRadius, 150 outlineRadius, 151 outlinePaint, 152 ) 153 } 154 } 155