In this article we will learn about some of the frequently asked Kotlin programming questions in technical like “android vertical seekbar” Code Answer. When creating scripts and web applications, error handling is an important part. If your code lacks error checking code, your program may look very unprofessional and you may be open to security risks. Error or stack handling on kotlin was simple and easy. An error message with filename, line number and a message describing the error is sent to the browser. This tutorial contains some of the most common error checking methods in Kotlin. Below are some solution about “android vertical seekbar” Code Answer.
android vertical seekbar
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import android.content.Context
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import android.graphics.Canvas
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import android.util.AttributeSet
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import android.view.MotionEvent
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class VerticalSeekBar : androidx.appcompat.widget.AppCompatSeekBar {
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private var changeListener: OnSeekBarChangeListener? = null
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private var x = 0
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private var y = 0
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private var z = 0
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private var w = 0
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constructor(context: Context) : super(context) {}
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constructor(context: Context, attrs: AttributeSet, defStyle: Int) : super(
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context,
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attrs,
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defStyle
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) {
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}
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constructor(context: Context, attrs: AttributeSet) : super(context, attrs) {}
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@Synchronized
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override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
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super.onSizeChanged(h, w, oldh, oldw)
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x = w
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y = h
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z = oldw
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this.w = oldh
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}
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override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
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super.onMeasure(heightMeasureSpec, widthMeasureSpec)
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setMeasuredDimension(measuredHeight, measuredWidth)
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}
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override fun onDraw(c: Canvas) {
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c.rotate(-90f)
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c.translate(-height.toFloat(), 0f)
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super.onDraw(c)
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}
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override fun onTouchEvent(event: MotionEvent): Boolean {
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if (!isEnabled) {
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return false
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}
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when (event.action) {
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MotionEvent.ACTION_DOWN -> {
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isSelected = true
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isPressed = true
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if (changeListener != null) changeListener!!.onStartTrackingTouch(this)
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}
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MotionEvent.ACTION_UP -> {
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isSelected = false
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isPressed = false
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if (changeListener != null) changeListener!!.onStopTrackingTouch(this)
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}
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MotionEvent.ACTION_MOVE -> {
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val progress = (max
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- (max * event.y / height).toInt())
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setProgress(progress)
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onSizeChanged(width, height, 0, 0)
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if (changeListener != null) changeListener!!.onProgressChanged(this, progress, true)
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}
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MotionEvent.ACTION_CANCEL -> {
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}
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}
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return true
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}
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@Synchronized
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override fun setOnSeekBarChangeListener(
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listener: OnSeekBarChangeListener
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) {
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changeListener = listener
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}
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@Synchronized
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override fun setProgress(progress: Int) {
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if (progress >= 0) super.setProgress(progress) else super.setProgress(0)
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onSizeChanged(x, y, z, w)
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if (changeListener != null) changeListener!!.onProgressChanged(this, progress, false)
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}
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}
