lib/components/card_collection.dart

import '../logic/card.dart' as logic_card;
import 'card.dart' show Card;
import 'draggable.dart' show Draggable;
import 'package:sky/widgets/basic.dart';
import 'package:sky/widgets.dart' show DragTarget;
import 'package:sky/theme/colors.dart' as colors;

enum Orientation { vert, horz, fan, show1 }

class CardCollectionComponent extends StatefulComponent {
  List<logic_card.Card> cards;
  Orientation orientation;
  bool faceUp;
  Function parentCallback;

  String status = 'bar';

  CardCollectionComponent(
      this.cards, this.faceUp, this.orientation, this.parentCallback);

  void syncConstructorArguments(CardCollectionComponent other) {
    cards = other.cards;
    orientation = other.orientation;
    faceUp = other.faceUp;
    parentCallback = other.parentCallback;
  }

  void _handleAccept(Card data) {
    setState(() {
      status = 'ACCEPT ${data.card.toString()}';
      parentCallback(data.card, this.cards);
    });
  }

  List<Widget> flexCards(List<Widget> cardWidgets) {
    List<Widget> flexWidgets = new List<Widget>();
    cardWidgets.forEach(
        (cardWidget) => flexWidgets.add(new Flexible(child: cardWidget)));
    return flexWidgets;
  }

  Widget wrapCards(List<Widget> cardWidgets) {
    switch (this.orientation) {
      case Orientation.vert:
        return new Flex(flexCards(cardWidgets),
            direction: FlexDirection.vertical);
      case Orientation.horz:
        return new Flex(flexCards(cardWidgets));
      case Orientation.fan:
      // unimplemented, so we'll fall through to show1, for now.
      // Probably a Stack + Positioned
      case Orientation.show1:
        return new Stack(cardWidgets);
      default:
        assert(false);
        return null;
    }
  }

  Widget build() {
    List<Widget> cardComponents = new List<Widget>();
    cardComponents.add(new Text(status));
    for (int i = 0; i < cards.length; i++) {
      cardComponents
          .add(new Draggable<Card>(new Card(cards[i], faceUp))); // flex
    }

    // Let's draw a stack of cards with DragTargets.
    // TODO(alexfandrianto): In many cases, card collections shouldn't have draggable cards.
    // Additionally, it may be worthwhile to restrict it to 1 at a time.
    return new DragTarget<Card>(
        onAccept: _handleAccept, builder: (List<Card> data, _) {
      print(this.cards.length);
      print(data);
      return new Container(
          decoration: new BoxDecoration(
              border: new Border.all(
                  width: 3.0,
                  color: data.isEmpty ? colors.white : colors.Blue[500]),
              backgroundColor: data.isEmpty
                  ? colors.Grey[500]
                  : colors.Green[500]),
          height: 80.0,
          margin: new EdgeDims.all(10.0),
          child: wrapCards(cardComponents));
    });
  }
}