android vertical seekbar
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)
}
}