JorgeCastilloPrz

import androidx.compose.foundation.Image
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.preferredSize
import androidx.compose.material.MaterialTheme
import androidx.compose.material.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.ColorFilter

JorgeCastilloPrz

import androidx.compose.Composable
import androidx.ui.core.Modifier
import androidx.ui.core.tag
import androidx.ui.foundation.Text
import androidx.ui.foundation.drawBackground
import androidx.ui.graphics.Color
import androidx.ui.layout.ConstraintLayout
import androidx.ui.layout.ConstraintSet
import androidx.ui.layout.fillMaxWidth
import androidx.ui.layout.padding

JorgeCastilloPrz

// Persistence.kt will end up looking like this after exercises 1 and 2.

fun stubPersistence(defaultAccounts: List<User>? = null, pool: CoroutineContext = IOPool) =
  object : AccountPersistence {
    private var accounts = defaultAccounts ?: emptyList()

    private lateinit var updateTrigger: () -> Unit

    override fun loadAccountsFromDatabase(): Stream<List<User>> = Stream(
      Stream.async {

JorgeCastilloPrz

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        title: 'FabLoader Demo',
        theme: ThemeData(
          primarySwatch: Colors.blue,
        ),
        home: Scaffold(
          appBar: AppBar(

JorgeCastilloPrz

class _FabLoadingWidget extends State<FabLoader>
    with SingleTickerProviderStateMixin {
  final Widget child;
  final double strokeWidth;

  AnimationController _controller;

  _FabLoadingWidget({@required this.strokeWidth, @required this.child});

  @override

JorgeCastilloPrz

final Animatable<double> _kRotationTween = CurveTween(curve: const SawTooth(5));

JorgeCastilloPrz

final Animatable<int> _kStepTween = StepTween(begin: 0, end: 5);

JorgeCastilloPrz

final Animatable<double> _kStrokeTailTween = CurveTween(
  curve: const Interval(0.5, 1.0, curve: Curves.fastOutSlowIn),
).chain(CurveTween(
  curve: const SawTooth(5),
));

JorgeCastilloPrz

final Animatable<double> _kStrokeHeadTween = CurveTween(
  curve: const Interval(0.0, 0.5, curve: Curves.fastOutSlowIn),
).chain(CurveTween(
  curve: const SawTooth(5),
));

JorgeCastilloPrz

class ArcPainter extends CustomPainter {
  // ...
  
  @override
  void paint(Canvas canvas, Size size) {
    if (backgroundColor != null) {
      final Paint backgroundPaint = Paint()
        ..color = backgroundColor
        ..strokeWidth = strokeWidth
        ..style = PaintingStyle.stroke;