ValeryPonomarenko

class HalfCircleProgressBar extends StatelessWidget {
  const HalfCircleProgressBar({
    Key? key,
    required this.progress,
    required this.dotColor,
    required this.progressDotColor,
    this.dotRadius = _defaultDotRadius,
    this.startBarRadius = _defaultStartBarRadius,
    this.layers = _defaultLayers,
    this.layersSpacing = _defaultLayersSpacing,

ValeryPonomarenko

@override
void paint(Canvas canvas, Size size) {
  final center = size.bottomCenter(Offset(0, -dotRadius));

  var radius = startBarRadius;

  for (var layer = 0; layer < layers; layer++) {
    final lengthOfHalfCircle = pi * radius;

    final dotsNumber = (lengthOfHalfCircle / _dotsSizeWithSpacing).floor();

ValeryPonomarenko

@override
void paint(Canvas canvas, Size size) {
  final center = size.bottomCenter(Offset(0, -dotRadius));

  final lengthOfHalfCircle = pi * startBarRadius;

  final dotsNumber = (lengthOfHalfCircle / _dotsSizeWithSpacing).floor();

  final angleStep = _halfCircle / (dotsNumber - 1);
  var angle = _startAngle;

ValeryPonomarenko

class _DiagramPainter extends CustomPainter {
  _DiagramPainter({
    required this.dotRadius,
    required this.startBarRadius,
    required this.layers,
    required this.layersSpacing,
    required this.dotsSpacing,
    required this.progress,
    required Color dotColor,
    required Color progressDotColor,

ValeryPonomarenko

version: 2

defaults: &defaults
  docker:
    - image: circleci/android:api-28-alpha
  environment:
    JVM_OPTS: -Xmx3200m

jobs:
  unit-tests:

ValeryPonomarenko

viewModel.viewState.observe(this) {
    when (it) {
        is SearchViewState.Entering -> {
            text_destination_from.text = it.from.name
            text_small_from.text = it.from.shortName
            text_destination_to.text = it.to.name
            text_small_to.text = it.to.shortName
        }
        is SearchViewState.Loaded -> {
            adapter.flights = it.flights

ValeryPonomarenko

class DestinationFragment : Fragment() {

    //code...
    
    @Inject
    internal lateinit var renderer: Renderer<DestinationViewState>

    private val viewModel by lazy { /* code ... */ }

    //code...

ValeryPonomarenko

//EmptyQuery state
class EmptyQueryViewStateRenderer @Inject constructor(): ViewStateRenderer<DestinationViewState> {
    override fun render(view: View, viewState: DestinationViewState) {
        view.text_message.visibility = View.VISIBLE
        view.progress.visibility = View.GONE
        view.recyclerView_destinations.visibility = View.GONE
        view.text_message.text = "Enter the city you want to flight"
    }
}

ValeryPonomarenko

class Renderer<VS>(
    private val viewStateRendererPicker: ViewStateRendererPicker<VS>,
    private val renderers: Map<KClass<out ViewStateRenderer<VS>>, ViewStateRenderer<VS>>
) {
    fun render(view: View, viewState: VS) {
        val rendererClass = viewStateRendererPicker.pick(viewState)
        renderers[rendererClass]?.render(view, viewState)
            ?: throw IllegalStateException("There is no ViewStateRenderer for ${rendererClass.simpleName}")
    }
}

ValeryPonomarenko

interface ViewStateRenderer<VS> {
    fun render(view: View, viewState: VS)
}