From 092bf21368ea824e9dc22467166960219165dc00 Mon Sep 17 00:00:00 2001
From: zuoxiao <470321431@qq.com>
Date: 星期五, 21 二月 2025 17:32:59 +0800
Subject: [PATCH] 1.我的界面每个item添加点击效果。 2.更新本地数据添加二次确认。
---
expand_button/src/main/java/com/example/expand_button/ExpandButton.kt | 632 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 631 insertions(+), 1 deletions(-)
diff --git a/expand_button/src/main/java/com/example/expand_button/ExpandButton.kt b/expand_button/src/main/java/com/example/expand_button/ExpandButton.kt
index 841ce47..007713c 100644
--- a/expand_button/src/main/java/com/example/expand_button/ExpandButton.kt
+++ b/expand_button/src/main/java/com/example/expand_button/ExpandButton.kt
@@ -1,14 +1,644 @@
package com.example.expand_button
-class ExpandButton {
+import android.animation.ValueAnimator
+import android.content.Context
+import android.graphics.Canvas
+import android.graphics.drawable.Drawable
+import android.text.Spannable
+import android.text.SpannableStringBuilder
+import android.text.style.ClickableSpan
+import android.util.AttributeSet
+import android.view.Gravity
+import android.view.MotionEvent
+import android.view.View
+import androidx.appcompat.widget.AppCompatTextView
+import androidx.core.content.ContextCompat
+
+/**
+ * 鍙睍寮�鐨勬寜閽帶浠�
+ * 鍒濆鐘舵�佹樉绀哄崟涓瓧绗︼紝鐐瑰嚮鍚庡睍寮�鏄剧ず瀹屾暣鏂囧瓧
+ * 灞曞紑鍚庣殑姣忎釜瀛楃閮藉彲浠ュ崟鐙偣鍑�
+ */
+class ExpandButton @JvmOverloads constructor(
+ context: Context,
+ attrs: AttributeSet? = null,
+ defStyleAttr: Int = 0
+) : AppCompatTextView(context, attrs, defStyleAttr) {
+
+ // 淇敼灞炴��
+ private data class LegendItem(
+ val selectedIcon: Drawable,
+ val unselectedIcon: Drawable,
+ val description: String,
+ var isSelected: Boolean = true
+ )
+
+ private var legendItems: List<LegendItem> = listOf()
+ private var itemSpacing: Float = context.resources.displayMetrics.density * 16 // 鍥句緥椤逛箣闂寸殑姘村钩闂磋窛
+ private var iconSize: Int = (24 * context.resources.displayMetrics.density).toInt() // 鍥炬爣澶у皬
+ private var iconTextSpacing: Float = context.resources.displayMetrics.density * 4 // 鍥炬爣鍜屾枃瀛椾箣闂寸殑鍨傜洿闂磋窛
+
+ // 灞曞紑鏃舵樉绀虹殑瀹屾暣鏂囧瓧
+ private var expandedText: String = "鏍囨敞鐐�: 褰撳墠浣嶇疆\n鍖哄煙: 閰嶉�佽寖鍥�"
+ // 鏀惰捣鏃舵樉绀虹殑鍗曚釜瀛楃
+ private var collapsedText: String = "鍥句緥"
+ // 褰撳墠鏄惁澶勪簬灞曞紑鐘舵��
+ private var isExpanded: Boolean = false
+ // 鍔ㄧ敾鎸佺画鏃堕棿锛岄粯璁�300姣
+ private var animationDuration: Long = 300
+ // 瀛楃鐐瑰嚮浜嬩欢鐩戝惉鍣�
+ private var onCharClickListener: ((Char, Int) -> Unit)? = null
+ // 瀛楅棿璺濓紝榛樿涓�2dp
+ private var customLetterSpacing: Float = context.resources.displayMetrics.density * 2
+
+ // 涓夎褰㈠浘鏍�
+ private val triangleDrawable: Drawable = ContextCompat.getDrawable(
+ context,
+ R.drawable.ic_triangle
+ )!!.mutate()
+
+ // 鍥炬爣鏃嬭浆瑙掑害
+ private var triangleRotation = 0f
+
+ // 涓夎褰㈠浘鏍囦笌鏂囧瓧鐨勯棿璺濓紝榛樿涓�8dp
+ private var triangleMargin: Float = 3 * context.resources.displayMetrics.density
+
+ // 娣诲姞鏂板睘鎬�
+ private var textLines: List<String> = listOf()
+
+ // 娣诲姞鐐瑰嚮鍥炶皟鎺ュ彛
+ interface OnLegendItemClickListener {
+ fun onLegendItemClick(position: Int, isSelected: Boolean)
+ }
+
+ private var legendItemClickListener: OnLegendItemClickListener? = null
+
+ // 淇敼鍥句緥椤圭殑鎬婚珮搴﹁绠�
+ private val legendItemHeight: Int
+ get() = iconSize + iconTextSpacing.toInt() + paint.textSize.toInt() + paint.descent().toInt() - paint.ascent().toInt()
+
+ // 娣诲姞灞曞紑鍚庣殑瀛椾綋澶у皬灞炴��
+ private var expandedTextSize: Float = textSize
+
+ // 娣诲姞涓�涓彉閲忎繚瀛橀粯璁ゅ瓧浣撳ぇ灏�
+ private var defaultTextSize: Float = 0f
+
+ // 娣诲姞涓�涓睘鎬у畾涔変笁瑙掑舰鍥炬爣鐨勭偣鍑诲尯鍩熸墿灞曡寖鍥�
+ private val triangleClickPadding: Float = 15f * context.resources.displayMetrics.density // 20dp
+
+ // 娣诲姞涓�涓爣璇嗙锛岀敤浜庡尯鍒嗕笉鍚岀殑 ExpandButton 瀹炰緥
+ private var buttonId: String = "default"
+
+ companion object {
+ private const val PREFS_NAME = "expand_button_prefs"
+ private const val KEY_LEGEND_STATES = "legend_states"
+ }
+
+ init {
+ // 淇濆瓨 XML 涓缃殑榛樿瀛椾綋澶у皬
+ defaultTextSize = textSize
+
+ // 璇诲彇鑷畾涔夊睘鎬�
+ context.theme.obtainStyledAttributes(
+ attrs,
+ R.styleable.ExpandButton,
+ defStyleAttr,
+ 0
+ ).apply {
+ try {
+ customLetterSpacing = getDimension(R.styleable.ExpandButton_letterSpacing, customLetterSpacing)
+ expandedText = getString(R.styleable.ExpandButton_expandedText) ?: "鏍囨敞鐐�: 褰撳墠浣嶇疆\n鍖哄煙: 閰嶉�佽寖鍥�"
+ collapsedText = getString(R.styleable.ExpandButton_collapsedText) ?: "鍥句緥"
+ animationDuration = getInteger(R.styleable.ExpandButton_animDuration, 300).toLong()
+ triangleMargin = getDimension(R.styleable.ExpandButton_triangleMargin, triangleMargin)
+ itemSpacing = getDimension(R.styleable.ExpandButton_itemSpacing, itemSpacing)
+ iconSize = getDimension(R.styleable.ExpandButton_iconSize, iconSize.toFloat()).toInt()
+ iconTextSpacing = getDimension(R.styleable.ExpandButton_iconTextSpacing, iconTextSpacing)
+ expandedTextSize = getDimension(R.styleable.ExpandButton_expandedTextSize, defaultTextSize)
+ } finally {
+ recycle()
+ }
+ }
+
+ // 璁剧疆鍒濆鏂囨湰鍜屽搴�
+ if (collapsedText.isNotEmpty()) {
+ text = collapsedText
+ post {
+ // 纭繚鍒濆瀹藉害涓烘敹璧风姸鎬佺殑瀹藉害
+ layoutParams = layoutParams.apply {
+ width = paint.measureText(collapsedText).toInt() + paddingLeft + paddingRight
+ }
+ }
+ }
+
+ // 淇敼瑙︽懜浜嬩欢澶勭悊
+ setOnTouchListener(null) // 绉婚櫎鍘熸湁鐨勮Е鎽哥洃鍚櫒
+
+ // 绉婚櫎鍘熸湁鐨勭偣鍑荤洃鍚櫒
+ setOnClickListener(null)
+
+ // 璁剧疆宸﹁竟璺濓紝涓哄浘鏍囩暀鍑虹┖闂�
+ compoundDrawablePadding = triangleMargin.toInt()
+ setPadding(
+ (16 * context.resources.displayMetrics.density + triangleMargin).toInt(), // 宸﹁竟璺濆鍔狅紝涓哄浘鏍囩暀绌洪棿
+ paddingTop,
+ paddingRight,
+ paddingBottom
+ )
+
+ // 璁剧疆鍗曡鏄剧ず锛岄槻姝㈤珮搴﹀彉鍖�
+ maxLines = if (isExpanded) Int.MAX_VALUE else 1
+ isSingleLine = !isExpanded
+
+ // 璁剧疆鏂囧瓧鍨傜洿灞呬腑
+ gravity = Gravity.CENTER_VERTICAL
+
+ // 璁剧疆榛樿鐨勫唴杈硅窛
+ val defaultPadding = (8 * context.resources.displayMetrics.density).toInt()
+ setPadding(
+ (16 * context.resources.displayMetrics.density + triangleMargin).toInt(), // 宸﹁竟璺濆鍔狅紝涓哄浘鏍囩暀绌洪棿
+ defaultPadding, // 涓婅竟璺�
+ defaultPadding, // 鍙宠竟璺�
+ defaultPadding // 涓嬭竟璺�
+ )
+ }
+
+ override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
+ super.onMeasure(widthMeasureSpec, heightMeasureSpec)
+
+ if (isExpanded) {
+ // 灞曞紑鐘舵�佷笅鐨勯珮搴﹁绠�
+ val desiredHeight = legendItemHeight + paddingTop + paddingBottom
+ setMeasuredDimension(measuredWidth, desiredHeight)
+ }
+ }
+
+ override fun onDraw(canvas: Canvas) {
+ // 缁樺埗灞曞紑/鏀惰捣鍥炬爣
+ drawTriangle(canvas)
+
+ if (!isExpanded) {
+ // 鏀惰捣鐘舵�佷娇鐢ㄩ粯璁ゅ瓧浣撳ぇ灏�
+ paint.textSize = defaultTextSize
+ super.onDraw(canvas)
+ return
+ }
+
+ // 灞曞紑鐘舵�佷娇鐢ㄥ睍寮�鍚庣殑瀛椾綋澶у皬
+ paint.textSize = expandedTextSize
+
+ // 璁＄畻鎵�鏈夊浘渚嬮」涓渶瀹界殑瀹藉害
+ val maxWidth = legendItems.maxOf { item ->
+ maxOf(paint.measureText(item.description), iconSize.toFloat())
+ }
+
+ // 璁＄畻鎬诲搴︼紙娣诲姞棣栧熬鐨勮竟璺濓級
+ val totalWidth = legendItems.size * maxWidth +
+ (legendItems.size + 1) * itemSpacing // 淇敼杩欓噷锛屾坊鍔犱竴涓澶栫殑闂磋窛
+
+ // 璁＄畻璧峰x鍧愭爣锛屼娇鏁翠綋姘村钩灞呬腑
+ var x = (width - totalWidth) / 2 + itemSpacing // 娣诲姞璧峰杈硅窛
+
+ // 璁＄畻鍨傜洿灞呬腑鐨剏鍧愭爣锛岃�冭檻涓婁笅杈硅窛
+ val centerY = height / 2f
+
+ legendItems.forEachIndexed { index, item ->
+ // 璁＄畻褰撳墠鍥句緥椤圭殑璧峰浣嶇疆锛堢Щ闄ndex > 0鐨勫垽鏂級
+ val itemStartX = x
+
+ // 璁＄畻鍥炬爣鐨勬按骞充綅缃紙灞呬腑浜庡浘渚嬮」锛�
+ val iconLeft = itemStartX + (maxWidth - iconSize) / 2
+
+ // 璁＄畻鏂囧瓧鐨勪綅缃�
+ val textWidth = paint.measureText(item.description)
+ val textX = itemStartX + (maxWidth - textWidth) / 2
+
+ // 缁樺埗鍥炬爣锛屾牴鎹�変腑鐘舵�侀�夋嫨涓嶅悓鐨勫浘鏍�
+ val iconTop = paddingTop + (height - legendItemHeight) / 2
+ val currentIcon = if (item.isSelected) item.selectedIcon else item.unselectedIcon
+ currentIcon.setBounds(
+ iconLeft.toInt(),
+ iconTop.toInt(),
+ (iconLeft + iconSize).toInt(),
+ (iconTop + iconSize).toInt()
+ )
+ currentIcon.draw(canvas)
+
+ // 缁樺埗鏂囧瓧锛屾牴鎹�変腑鐘舵�佷娇鐢ㄤ笉鍚岀殑棰滆壊
+ paint.color = if (item.isSelected)
+ currentTextColor
+ else
+ 0xFF999999.toInt() // 鐏拌壊
+ val textY = iconTop + iconSize + iconTextSpacing - paint.ascent()
+ canvas.drawText(item.description, textX, textY, paint)
+
+ // 鏇存柊涓嬩竴涓浘渚嬮」鐨勮捣濮嬩綅缃�
+ x = itemStartX + maxWidth + itemSpacing
+ }
+
+ // 鎭㈠鐢荤瑪棰滆壊
+ paint.color = currentTextColor
+ }
+
+ // 灏嗗師鏉ョ殑onDraw涓殑涓夎褰㈢粯鍒堕�昏緫鎻愬彇鍑烘潵
+ private fun drawTriangle(canvas: Canvas) {
+ canvas.save()
+
+ val iconSize = triangleDrawable.intrinsicWidth
+ val iconLeft = paddingLeft - iconSize - compoundDrawablePadding
+ val iconTop = (height - iconSize) / 2
+
+ triangleDrawable.setBounds(
+ iconLeft,
+ iconTop,
+ iconLeft + iconSize,
+ iconTop + iconSize
+ )
+
+ canvas.rotate(
+ triangleRotation,
+ (iconLeft + iconSize / 2).toFloat(),
+ (iconTop + iconSize / 2).toFloat()
+ )
+
+ triangleDrawable.draw(canvas)
+
+ canvas.restore()
+ }
+
+ /**
+ * 璁剧疆瀛楅棿璺�
+ * @param spacing 闂磋窛鍊硷紙鍍忕礌锛�
+ */
+ fun setCustomLetterSpacing(spacing: Float) {
+ this.customLetterSpacing = spacing
+ if (isExpanded) {
+ setExpandedClickableText()
+ }
+ }
+
+ /**
+ * 璁剧疆灞曞紑鍜屾敹璧锋椂鏄剧ず鐨勬枃瀛�
+ * @param expanded 灞曞紑鏃舵樉绀虹殑瀹屾暣鏂囧瓧
+ * @param collapsed 鏀惰捣鏃舵樉绀虹殑鍗曚釜瀛楃
+ */
+ fun setExpandText(expanded: String, collapsed: String) {
+ this.expandedText = expanded
+ this.collapsedText = collapsed
+ text = collapsedText
+ }
+
+ /**
+ * 璁剧疆鍗曚釜瀛楃鐐瑰嚮鐩戝惉鍣�
+ * @param listener 鐐瑰嚮鍥炶皟锛屽弬鏁颁负琚偣鍑荤殑瀛楃鍜屼綅缃�
+ * char: 琚偣鍑荤殑瀛楃
+ * position: 瀛楃鍦ㄦ枃鏈腑鐨勪綅缃紙浠�0寮�濮嬶級
+ */
+ fun setOnCharClickListener(listener: (char: Char, position: Int) -> Unit) {
+ this.onCharClickListener = listener
+ }
+
+ /**
+ * 璁剧疆灞曞紑/鏀惰捣鍔ㄧ敾鐨勬寔缁椂闂�
+ * @param duration 鍔ㄧ敾鎸佺画鏃堕棿锛堟绉掞級
+ */
+ fun setAnimationDuration(duration: Long) {
+ this.animationDuration = duration
+ }
+
+ /**
+ * 鍒囨崲灞曞紑/鏀惰捣鐘舵��
+ */
+ private fun toggleExpand() {
+ isExpanded = !isExpanded
+
+ // 璁＄畻鏀惰捣鍜屽睍寮�鐘舵�佺殑瀹藉害
+ val collapsedWidth = run {
+ paint.textSize = defaultTextSize
+ val width = paint.measureText(collapsedText).toInt() + paddingLeft + paddingRight
+ paint.textSize = if (isExpanded) expandedTextSize else defaultTextSize
+ width
+ }
+
+ val expandedWidth = calculateExpandedWidth()
+
+ // 鍒涘缓瀹藉害鍔ㄧ敾
+ ValueAnimator.ofInt(
+ if (isExpanded) collapsedWidth else expandedWidth,
+ if (isExpanded) expandedWidth else collapsedWidth
+ ).apply {
+ duration = animationDuration
+ addUpdateListener { animator ->
+ layoutParams = layoutParams.apply {
+ width = animator.animatedValue as Int
+ }
+ requestLayout()
+ }
+ start()
+ }
+
+ // 鍒涘缓鍥炬爣鏃嬭浆鍔ㄧ敾
+ ValueAnimator.ofFloat(
+ if (isExpanded) 0f else 180f,
+ if (isExpanded) 180f else 0f
+ ).apply {
+ duration = animationDuration
+ addUpdateListener { animator ->
+ triangleRotation = animator.animatedValue as Float
+ invalidate()
+ }
+ start()
+ }
+
+ // 鏇存柊鏂囨湰鍜屽瓧浣撳ぇ灏�
+ if (isExpanded) {
+ paint.textSize = expandedTextSize
+ } else {
+ text = collapsedText
+ paint.textSize = defaultTextSize
+ setTextSize(android.util.TypedValue.COMPLEX_UNIT_PX, defaultTextSize)
+ }
+
+ invalidate()
+ }
+
+ /**
+ * 璁＄畻灞曞紑鍚庣殑鎬诲搴�
+ */
+ private fun calculateExpandedWidth(): Int {
+ // 涓存椂淇濆瓨褰撳墠瀛椾綋澶у皬
+ val currentTextSize = paint.textSize
+ // 璁剧疆涓哄睍寮�鐘舵�佺殑瀛椾綋澶у皬
+ paint.textSize = expandedTextSize
+
+ try {
+ // 璁＄畻鎵�鏈夊浘渚嬮」涓渶瀹界殑瀹藉害
+ val maxWidth = legendItems.maxOf { item ->
+ maxOf(paint.measureText(item.description), iconSize.toFloat())
+ }
+
+ // 璁＄畻鎬诲搴� = 鎵�鏈夊浘渚嬮」鐨勫搴� + 鎵�鏈夐棿璺濓紙鍖呮嫭棣栧熬锛� + 宸﹀彸鍐呰竟璺�
+ return (legendItems.size * maxWidth +
+ (legendItems.size + 1) * itemSpacing +
+ paddingLeft + paddingRight).toInt()
+ } finally {
+ // 鎭㈠鍘熸潵鐨勫瓧浣撳ぇ灏�
+ paint.textSize = currentTextSize
+ }
+ }
+
+ /**
+ * 璁剧疆灞曞紑鍚庣殑鍙偣鍑绘枃鏈�
+ */
+ private fun setExpandedClickableText() {
+ val builder = SpannableStringBuilder()
+
+ // 璁＄畻鎵�鏈夊浘渚嬮」涓渶瀹界殑瀹藉害
+ val maxWidth = legendItems.maxOf { item ->
+ maxOf(paint.measureText(item.description), iconSize.toFloat())
+ }
+
+ // 璁＄畻鎬诲搴�
+ val totalWidth = legendItems.size * maxWidth +
+ (legendItems.size - 1) * itemSpacing
+
+ // 璁＄畻鏁翠綋姘村钩灞呬腑闇�瑕佺殑璧峰绌烘牸
+ val startPadding = ((width - totalWidth) / 2 / paint.measureText(" ")).toInt()
+ if (startPadding > 0) {
+ builder.append(" ".repeat(startPadding))
+ }
+
+ // 娣诲姞鍨傜洿绌洪棿锛屼负鍥炬爣棰勭暀浣嶇疆
+ val verticalSpaces = ((iconSize + iconTextSpacing) / paint.textSize).toInt()
+ builder.append("\n".repeat(verticalSpaces))
+
+ legendItems.forEachIndexed { index, item ->
+ if (index > 0) {
+ // 鍦ㄥ浘渚嬮」涔嬮棿娣诲姞姘村钩闂磋窛
+ builder.append(" ".repeat((itemSpacing / paint.measureText(" ")).toInt()))
+ }
+
+ // 璁＄畻姘村钩灞呬腑鎵�闇�鐨勭┖鏍兼暟
+ val textWidth = paint.measureText(item.description)
+ val paddingSpaces = ((maxWidth - textWidth) / 2 / paint.measureText(" ")).toInt()
+
+ // 娣诲姞宸︿晶绌烘牸瀹炵幇灞呬腑
+ if (paddingSpaces > 0) {
+ builder.append(" ".repeat(paddingSpaces))
+ }
+
+ // 娣诲姞鎻忚堪鏂囨湰
+ val startPosition = builder.length
+ builder.append(item.description)
+
+ // 娣诲姞鍙充晶绌烘牸浠ョ‘淇濆搴︿竴鑷�
+ val remainingSpaces = ((maxWidth - textWidth) / paint.measureText(" ")).toInt() - paddingSpaces
+ if (remainingSpaces > 0) {
+ builder.append(" ".repeat(remainingSpaces))
+ }
+
+ // 涓烘枃瀛楄缃偣鍑讳簨浠�
+ val clickableSpan = object : ClickableSpan() {
+ override fun onClick(view: View) {
+ onCharClickListener?.invoke(item.description[0], index)
+ }
+
+ override fun updateDrawState(ds: android.text.TextPaint) {
+ super.updateDrawState(ds)
+ ds.isUnderlineText = false
+ ds.color = currentTextColor
+ }
+ }
+
+ builder.setSpan(
+ clickableSpan,
+ startPosition,
+ startPosition + item.description.length,
+ Spannable.SPAN_EXCLUSIVE_EXCLUSIVE
+ )
+ }
+
+ // 璁剧疆鏂囨湰瀵归綈鏂瑰紡涓哄眳涓�
+ gravity = Gravity.CENTER
+
+ text = builder
+ movementMethod = android.text.method.LinkMovementMethod.getInstance()
+ }
+
+ /**
+ * 鍒ゆ柇鐐瑰嚮鏄惁鍦ㄤ笁瑙掑舰鍥炬爣鍖哄煙鍐�
+ */
+ private fun isClickOnTriangle(x: Float): Boolean {
+ val iconSize = triangleDrawable.intrinsicWidth
+ val iconLeft = paddingLeft - iconSize - compoundDrawablePadding
+
+ // 鎵╁ぇ鐐瑰嚮鍖哄煙锛氬乏鍙冲悇澧炲姞 triangleClickPadding
+ return x <= (paddingLeft + triangleClickPadding) &&
+ x >= (iconLeft - triangleClickPadding)
+ }
+
+ /**
+ * 璁剧疆涓夎褰㈠浘鏍囦笌鏂囧瓧鐨勯棿璺�
+ * @param margin 闂磋窛鍊硷紙鍍忕礌锛�
+ */
+ fun setTriangleMargin(margin: Float) {
+ this.triangleMargin = margin
+ compoundDrawablePadding = margin.toInt()
+ setPadding(
+ (16 * context.resources.displayMetrics.density + margin).toInt(),
+ paddingTop,
+ paddingRight,
+ paddingBottom
+ )
+ }
+
+ /**
+ * 璁剧疆鎸夐挳鐨勫敮涓�鏍囪瘑绗�
+ * @param id 鏍囪瘑绗�
+ */
+ fun setButtonId(id: String) {
+ this.buttonId = id
+ // 鍔犺浇淇濆瓨鐨勭姸鎬�
+
+ }
+ /**
+ * 璁剧疆鍥句緥鍐呭
+ */
+ @JvmName("setLegendsList")
+ fun setLegends(items: List<Quadruple<Drawable, Drawable, String, Boolean>>) {
+ legendItems = items.map { (selectedIcon, unselectedIcon, description, isSelected) ->
+ selectedIcon.setBounds(0, 0, iconSize, iconSize)
+ unselectedIcon.setBounds(0, 0, iconSize, iconSize)
+ LegendItem(selectedIcon, unselectedIcon, description, isSelected)
+ }
+
+ if (!isExpanded) {
+ text = collapsedText
+ } else {
+ invalidate()
+ }
+ requestLayout()
+ }
+ // 娣诲姞涓�涓� Java 鍙嬪ソ鐨勬柟娉�
+ @JvmName("setLegendsArray")
+ fun setLegends(vararg items: Quadruple<Drawable, Drawable, String, Boolean>) {
+ setLegends(items.toList())
+ }
+ // 娣诲姞涓�涓暟鎹被鏉ヨ〃绀哄洓鍏冪粍
+ data class Quadruple<A, B, C, D>(
+ val first: A,
+ val second: B,
+ val third: C,
+ val fourth: D
+ )
+ // 娣诲姞涓�涓究鎹风殑鎵╁睍鍑芥暟鏉ュ垱寤� Quadruple
+ fun <A, B, C, D> quadrupleOf(first: A, second: B, third: C, fourth: D): Quadruple<A, B, C, D> {
+ return Quadruple(first, second, third, fourth)
+ }
+ /**
+ * 娣诲姞璁剧疆鐩戝惉鍣ㄧ殑鏂规硶
+ */
+ fun setOnLegendItemClickListener(listener: OnLegendItemClickListener) {
+ legendItemClickListener = listener
+ }
+ /**
+ * 澶勭悊瑙︽懜浜嬩欢
+ */
+ override fun onTouchEvent(event: MotionEvent): Boolean {
+ when (event.action) {
+ MotionEvent.ACTION_DOWN -> {
+ // 妫�鏌ョ偣鍑绘槸鍚﹀湪涓夎褰㈠浘鏍囧尯鍩熷唴
+ if (isClickOnTriangle(event.x)) {
+ toggleExpand()
+ return true
+ }
+
+ // 濡傛灉鏄睍寮�鐘舵�侊紝妫�鏌ユ槸鍚︾偣鍑讳簡鍥句緥椤�
+ if (isExpanded) {
+ val clickedIndex = getClickedItemIndex(event.x, event.y)
+ if (clickedIndex != -1) {
+ toggleItemSelection(clickedIndex)
+ return true
+ }
+ } else if (!isExpanded && event.x > paddingLeft) {
+ // 鍦ㄦ敹璧风姸鎬佷笅锛岀偣鍑婚潪涓夎褰㈠尯鍩熶篃灞曞紑
+ toggleExpand()
+ return true
+ }
+ }
+ }
+ return super.onTouchEvent(event)
+ }
+ /**
+ * 鑾峰彇鐐瑰嚮浣嶇疆瀵瑰簲鐨勫浘渚嬮」绱㈠紩
+ */
+ private fun getClickedItemIndex(x: Float, y: Float): Int {
+ if (!isExpanded) return -1
+ val maxWidth = legendItems.maxOf { item ->
+ maxOf(paint.measureText(item.description), iconSize.toFloat())
+ }
+
+ val totalWidth = legendItems.size * maxWidth +
+ (legendItems.size - 1) * itemSpacing
+
+ val startX = (width - totalWidth) / 2
+ val iconTop = paddingTop + (height - legendItemHeight) / 2
+ val iconBottom = iconTop + legendItemHeight
+ // 妫�鏌ュ瀭鐩存柟鍚戞槸鍚﹀湪鍥句緥椤硅寖鍥村唴
+ if (y < iconTop || y > iconBottom) return -1
+
+ // 妫�鏌ユ按骞虫柟鍚戠偣鍑荤殑鏄摢涓浘渚嬮」
+ legendItems.forEachIndexed { index, _ ->
+ val itemStartX = startX + index * (maxWidth + itemSpacing)
+ val itemEndX = itemStartX + maxWidth
+ if (x >= itemStartX && x <= itemEndX) {
+ return index
+ }
+ }
+ return -1
+ }
+
+ /**
+ * 鍒囨崲鍥句緥椤圭殑閫変腑鐘舵��
+ */
+ private fun toggleItemSelection(index: Int) {
+ if (index < 0 || index >= legendItems.size) return
+
+ legendItems[index].isSelected = !legendItems[index].isSelected
+ legendItemClickListener?.onLegendItemClick(
+ index,
+ legendItems[index].isSelected
+ )
+
+ invalidate()
+ }
+
+ /**
+ * 璁剧疆灞曞紑鍚庣殑瀛椾綋澶у皬
+ * @param size 瀛椾綋澶у皬锛堝儚绱狅級
+ */
+ fun setExpandedTextSize(size: Float) {
+ this.expandedTextSize = size
+ if (isExpanded) {
+ invalidate()
+ }
+ }
+
+ /**
+ * 璁剧疆灞曞紑鍚庣殑瀛椾綋澶у皬锛圫P锛�
+ * @param sp 瀛椾綋澶у皬锛圫P锛�
+ */
+ fun setExpandedTextSizeSp(sp: Float) {
+ setExpandedTextSize(sp * context.resources.displayMetrics.scaledDensity)
+ }
}
\ No newline at end of file
--
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