build method

@override Widget build(BuildContext context)

Build a widget.

Implementation

@override
Widget build(final BuildContext context) {
  final texts = widget.menuItems
      .map(
        (final menuItem) => Text(menuItem.title),
      )
      .toList();
  final musicSound = widget.music;
  return MaybeMusic(
    music: musicSound,
    builder: (final musicContext) => GameShortcuts(
      shortcuts: [
        if (widget.canPop)
          GameShortcut(
            title: 'Close the menu',
            shortcut: widget.backShortcut,
            onStart: Navigator.maybePop,
          ),
        GameShortcut(
          title: 'Move up in the menu',
          shortcut: widget.upShortcut,
          onStart: (final innerContext) => moveUp(),
        ),
        GameShortcut(
          title: 'Move down in the menu',
          shortcut: widget.downShortcut,
          onStart: (final innerContext) => moveDown(),
        ),
        GameShortcut(
          title: 'Activate the current menu item',
          shortcut: widget.activateShortcut,
          onStart: activateItem,
        ),
        GameShortcut(
          title: 'Activate the current menu item',
          shortcut: GameShortcutsShortcut.space,
          onStart: activateItem,
        ),
      ],
      child: Material(
        child: OrientationBuilder(
          builder: (final orientationContext, final orientation) {
            final size = MediaQuery.of(orientationContext).size;
            final ruler = size.longestSide;
            return Semantics(
              excludeSemantics: true,
              label: 'Swipe up and down to move through items in the menu or '
                  'turn off your screen reader.',
              customSemanticsActions: {
                for (final menuItem in widget.menuItems)
                  CustomSemanticsAction(label: menuItem.title): () {
                    orientationContext.maybePlaySound(
                      widget.activateItemSound,
                    );
                    menuItem.onActivate(orientationContext);
                  },
              },
              child: Stack(
                children: [
                  switch (orientation) {
                    Orientation.portrait => Column(
                        children: texts,
                      ),
                    Orientation.landscape => Row(
                        children: texts,
                      ),
                  },
                  TouchMenuArea(
                    onDoubleTap: () => activateItem(orientationContext),
                    onPan: (final point) {
                      final double coordinate;
                      switch (orientation) {
                        case Orientation.portrait:
                          coordinate = point.y;
                        case Orientation.landscape:
                          coordinate = point.x;
                      }
                      final scale = coordinate / ruler;
                      final index =
                          (scale * (widget.menuItems.length - 1)).round();
                      setCurrentMenuItem(index);
                    },
                  ),
                ],
              ),
            );
          },
        ),
      ),
    ),
    fadeInTime: widget.musicFadeInTime,
    fadeOutTime: widget.musicFadeOutTime,
  );
}