riggaroo

canvas.save()
canvas.translate(200f, 300f)
canvas.drawCircle(...) // drawn on the translated canvas
canvas.restore()

riggaroo

/**
 * Wrap the specified [block] in calls to [Canvas.save]/[Canvas.translate]
 * and [Canvas.restoreToCount].
 */
inline fun Canvas.withTranslation(
    x: Float = 0.0f,
    y: Float = 0.0f,
    block: Canvas.() -> Unit
) {
    val checkpoint = save()

riggaroo

canvas.withTranslate(200f, 300f, {
    drawCircle(...)
})

riggaroo

canvas.withTranslate(200f, 300f) {
    drawCircle(...)
}

riggaroo

canvas.withTranslation(200f, 300f) {
  drawCircle(150f, 150f, RADIUS, circlePaint)
    withRotation(45f) {
      drawRect(rect, rectPaint)
    }
}

riggaroo

private fun animateToPoint(point: Point) {
    val propertyX = PropertyValuesHolder.ofFloat(ColorDropperView.PROPERTY_X, dropperPoint.x, point.x)
    val propertyY = PropertyValuesHolder.ofFloat(ColorDropperView.PROPERTY_Y, dropperPoint.y, point.y)

    val animator = ValueAnimator()
    animator.setValues(propertyX, propertyY)
    animator.interpolator = OvershootInterpolator()
    animator.duration = 100
    animator.addUpdateListener { animation ->
        val animatedX = animation.getAnimatedValue(ColorDropperView.PROPERTY_X) as Float

riggaroo

private val floatPropertyAnimX = object : FloatPropertyCompat<ColorDropperView>(PROPERTY_X) {
    override fun setValue(dropper: ColorDropperView?, value: Float) {
        dropper?.setDropperX(value)
    }

    override fun getValue(dropper: ColorDropperView?): Float {
        return dropper?.getDropperX() ?: 0f
    }
}

riggaroo

private fun animateToPoint(point: Point) {

    SpringAnimation(this, floatPropertyAnimX, point.x).apply {
        spring.stiffness = SpringForce.STIFFNESS_MEDIUM       
        spring.dampingRatio = SpringForce.DAMPING_RATIO_MEDIUM_BOUNCY
        start()
    }

    SpringAnimation(this, floatPropertyAnimY, point.y).apply {
        spring.stiffness = SpringForce.STIFFNESS_MEDIUM

riggaroo

SpringAnimation(this, floatPropertyAnimY, point.y).apply {
    setStartVelocity(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 5000f, resources.displayMetrics))
    start()
}

riggaroo

// Why use inline classes? 🤔 
// 🎯 Compile time safety 
// 🎯 Less runtime overhead than a normal wrapper class as it "inlines" the data into its usages   
// More info : https://kotlinlang.org/docs/reference/inline-classes.html


// Without inline classes 😞
data class Recipe(id: UUID)

data class Ingredient(id: UUID, recipeId: UUID)