package cn.sinata.xldutils.view
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import android.content.Context
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import android.graphics.Canvas
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import android.graphics.Color
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import android.graphics.Paint
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import android.graphics.Path
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import android.graphics.RectF
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import android.graphics.Paint.Style
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import android.util.AttributeSet
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import android.util.TypedValue
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import android.view.View
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/**
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* 裁剪视图
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* @author sinata
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*/
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class ClipImageBorderView @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null, defStyle: Int = 0) : View(context, attrs, defStyle) {
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enum class Mode {
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Circle, Rect
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}
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private var mode = Mode.Rect//默认矩形模式
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/**
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* 水平方向与View的边距
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*/
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private var mHorizontalPadding: Int = 0
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/**
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* 垂直方向与View的边距
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*/
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private var mVerticalPadding: Int = 0
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/**
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* 绘制的矩形的宽度
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*/
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private var mWidth: Int = 0
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/**
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* 边框的颜色，默认为白色
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*/
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private val mBorderColor = Color.parseColor("#FFFFFF")
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/**
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* 边框的宽度 单位dp
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*/
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private var mBorderWidth = 1
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private val mPaint: Paint
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private var scale = 1f
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init {
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mBorderWidth = TypedValue.applyDimension(
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TypedValue.COMPLEX_UNIT_DIP, mBorderWidth.toFloat(), resources
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.displayMetrics).toInt()
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mPaint = Paint()
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mPaint.isAntiAlias = true
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}
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override fun onDraw(canvas: Canvas) {
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super.onDraw(canvas)
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// 计算矩形区域的宽度
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mWidth = width - 2 * mHorizontalPadding
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// 计算距离屏幕垂直边界 的边距
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mVerticalPadding = (height - (mWidth / scale).toInt()) / 2
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mPaint.color = Color.parseColor("#aa000000")
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mPaint.style = Style.FILL
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if (mode == Mode.Circle) {
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drawLiftUp(canvas)
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drawRightUp(canvas)
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drawLiftDown(canvas)
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drawRightDown(canvas)
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// 绘制外边框
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mPaint.color = mBorderColor
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mPaint.strokeWidth = mBorderWidth.toFloat()
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mPaint.style = Style.STROKE
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canvas.drawCircle((width / 2).toFloat(), (height / 2).toFloat(), (mWidth / 2).toFloat(), mPaint)
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} else {
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// 绘制左边1
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canvas.drawRect(0f, 0f, mHorizontalPadding.toFloat(), height.toFloat(), mPaint)
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// 绘制右边2
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canvas.drawRect((width - mHorizontalPadding).toFloat(), 0f, width.toFloat(),
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height.toFloat(), mPaint)
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// 绘制上边3
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canvas.drawRect(mHorizontalPadding.toFloat(), 0f, (width - mHorizontalPadding).toFloat(),
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mVerticalPadding.toFloat(), mPaint)
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// 绘制下边4
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canvas.drawRect(mHorizontalPadding.toFloat(), (height - mVerticalPadding).toFloat(),
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(width - mHorizontalPadding).toFloat(), height.toFloat(), mPaint)
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// 绘制外边框
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mPaint.color = mBorderColor
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mPaint.strokeWidth = mBorderWidth.toFloat()
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mPaint.style = Style.STROKE
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canvas.drawRect(mHorizontalPadding.toFloat(), mVerticalPadding.toFloat(), (width - mHorizontalPadding).toFloat(), (height - mVerticalPadding).toFloat(), mPaint)
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}
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}
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fun setHorizontalPadding(mHorizontalPadding: Int) {
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this.mHorizontalPadding = mHorizontalPadding
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}
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/**
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* 设置宽高比
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* @param scale
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*/
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fun setImageScale(scale: Float) {
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this.scale = scale
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}
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/**
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* 设置裁剪显示区域模式圆或矩形。默认矩形。
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* @param mode
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*/
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fun setMode(mode: Mode) {
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this.mode = mode
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}
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private fun drawLiftUp(canvas: Canvas) {
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val path = Path()
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path.moveTo((width / 2).toFloat(), mVerticalPadding.toFloat())
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path.lineTo((width / 2).toFloat(), 0f)
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path.lineTo(0f, 0f)
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path.lineTo(0f, (height / 2).toFloat())
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path.lineTo(mHorizontalPadding.toFloat(), (height / 2).toFloat())
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path.arcTo(RectF(
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mHorizontalPadding.toFloat(),
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mVerticalPadding.toFloat(),
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(width - mHorizontalPadding).toFloat(),
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(height - mVerticalPadding).toFloat()),
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180f,
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90f)
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path.close()
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canvas.drawPath(path, mPaint)
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}
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private fun drawLiftDown(canvas: Canvas) {
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val path = Path()
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path.moveTo(mHorizontalPadding.toFloat(), (height / 2).toFloat())
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path.lineTo(0f, (height / 2).toFloat())
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path.lineTo(0f, height.toFloat())
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path.lineTo((width / 2).toFloat(), height.toFloat())
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path.lineTo((width / 2).toFloat(), (height - mVerticalPadding).toFloat())
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path.arcTo(RectF(
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mHorizontalPadding.toFloat(),
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mVerticalPadding.toFloat(),
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(width - mHorizontalPadding).toFloat(),
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(height - mVerticalPadding).toFloat()),
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90f,
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90f)
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path.close()
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canvas.drawPath(path, mPaint)
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}
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private fun drawRightDown(canvas: Canvas) {
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val path = Path()
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path.moveTo((width / 2).toFloat(), (height - mVerticalPadding).toFloat())
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path.lineTo((width / 2).toFloat(), height.toFloat())
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path.lineTo(width.toFloat(), height.toFloat())
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path.lineTo(width.toFloat(), (height / 2).toFloat())
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path.lineTo((width - mHorizontalPadding).toFloat(), (height / 2).toFloat())
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path.arcTo(RectF(
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mHorizontalPadding.toFloat(),
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mVerticalPadding.toFloat(),
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(width - mHorizontalPadding).toFloat(),
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(height - mVerticalPadding).toFloat()),
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0f,
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90f)
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path.close()
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canvas.drawPath(path, mPaint)
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}
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private fun drawRightUp(canvas: Canvas) {
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val path = Path()
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path.moveTo((width - mHorizontalPadding).toFloat(), (height / 2).toFloat())
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path.lineTo(width.toFloat(), (height / 2).toFloat())
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path.lineTo(width.toFloat(), 0f)
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path.lineTo((width / 2).toFloat(), 0f)
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path.lineTo((width / 2).toFloat(), mVerticalPadding.toFloat())
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path.arcTo(RectF(
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mHorizontalPadding.toFloat(),
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mVerticalPadding.toFloat(),
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(width - mHorizontalPadding).toFloat(),
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(height - mVerticalPadding).toFloat()),
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270f,
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90f)
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path.close()
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canvas.drawPath(path, mPaint)
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}
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}
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