witlp Rautela

import android.content.Context

import android.graphics.Canvas

import android.util.AttributeSet

import android.view.MotionEvent

class VerticalSeekBar : androidx.appcompat.widget.AppCompatSeekBar {

    private var changeListener: OnSeekBarChangeListener? = null

    private var x = 0

    private var y = 0

    private var z = 0

    private var w = 0

    constructor(context: Context) : super(context) {}

    constructor(context: Context, attrs: AttributeSet, defStyle: Int) : super(

        context,

        attrs,

        defStyle

    ) {

    }

    constructor(context: Context, attrs: AttributeSet) : super(context, attrs) {}

    @Synchronized

    override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {

        super.onSizeChanged(h, w, oldh, oldw)

        x = w

        y = h

        z = oldw

        this.w = oldh

    }

    override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {

        super.onMeasure(heightMeasureSpec, widthMeasureSpec)

        setMeasuredDimension(measuredHeight, measuredWidth)

    }

    override fun onDraw(c: Canvas) {

        c.rotate(-90f)

        c.translate(-height.toFloat(), 0f)

        super.onDraw(c)

    }

    override fun onTouchEvent(event: MotionEvent): Boolean {

        if (!isEnabled) {

            return false

        }

        when (event.action) {

            MotionEvent.ACTION_DOWN -> {

                isSelected = true

                isPressed = true

                if (changeListener != null) changeListener!!.onStartTrackingTouch(this)

            }

            MotionEvent.ACTION_UP -> {

                isSelected = false

                isPressed = false

                if (changeListener != null) changeListener!!.onStopTrackingTouch(this)

            }

            MotionEvent.ACTION_MOVE -> {

                val progress = (max

                        - (max * event.y / height).toInt())

                setProgress(progress)

                onSizeChanged(width, height, 0, 0)

                if (changeListener != null) changeListener!!.onProgressChanged(this, progress, true)

            }

            MotionEvent.ACTION_CANCEL -> {

            }

        }

        return true

    }

    @Synchronized

    override fun setOnSeekBarChangeListener(

        listener: OnSeekBarChangeListener

    ) {

        changeListener = listener

    }

    @Synchronized

    override fun setProgress(progress: Int) {

        if (progress >= 0) super.setProgress(progress) else super.setProgress(0)

        onSizeChanged(x, y, z, w)

        if (changeListener != null) changeListener!!.onProgressChanged(this, progress, false)

    }

}