Merge "Fixed inaccurate brightness slider UI" into tm-qpr-dev

 * Meant to be used with a rounded ends background, it will also prevent deformation when the slider

 * is meant to be smaller than the rounded corner. The background should have rounded corners that

 * are half of the height.

 *

 * This class also assumes that a "thumb" icon exists within the end's edge of the progress

 * drawable, and the slider's width, when interacted on, if offset by half the size of the thumb

 * icon which puts the icon directly underneath the user's finger.

 *

 */

class RoundedCornerProgressDrawable @JvmOverloads constructor(

    drawable: Drawable? = null

    override fun onLevelChange(level: Int): Boolean {

        val db = drawable?.bounds!!

        // The thumb offset shifts the sun icon directly under the user's thumb

        val thumbOffset = bounds.height() / 2

        val width = bounds.width() * level / MAX_LEVEL + thumbOffset

        // On 0, the width is bounds.height (a circle), and on MAX_LEVEL, the width is bounds.width

        val width = bounds.height() + (bounds.width() - bounds.height()) * level / MAX_LEVEL

        drawable?.setBounds(bounds.left, db.top, bounds.left + width, db.bottom)

        drawable?.setBounds(

            bounds.left, db.top,

            width.coerceAtMost(bounds.width()).coerceAtLeast(bounds.height()), db.bottom

        )

        return super.onLevelChange(level)

    }