buildAppBar method

@protected Widget buildAppBar(BuildParameters params)

Implementation

@protected
Widget buildAppBar(BuildParameters params) {
  var leading = builder.tryBuildWidget(params.context,
      params.widgets["leading"], params.state, params.parentContext);
  leading ??= params.buildProp("leadingIcon");

  var title = builder.tryBuildWidget(params.context,
      params.widgets["titleWidget"], params.state, params.parentContext);
  if (title == null && params.props["title"] != null) {
    title = Text(properties.getText(params.props["title"], "appBar"));
  }

  var bottom = builder.tryBuildWidget(params.context,
      params.widgets["bottom"], params.state, params.parentContext);
  if (bottom is! PreferredSizeWidget) {
    bottom = null;
  }

  final actions = <Widget>[];
  if (params.widgets["actions"] != null) {
    for (Map actionSpec in params.widgets["actions"] as List<Map>) {
      actions.add(builder.buildWidget(
          params.context, actionSpec, params.state, params.parentContext));
    }
  }

  final backgroundColor = tryParseColor(params.props["backgroundColor"]);
  final systemUiOverlayStyleProp = params.props["systemUiOverlayStyle"];
  final systemUiOverlayStyle = systemUiOverlayStyleProp == null
      ? null
      : systemUiOverlayStyleProp == "dark"
          ? SystemUiOverlayStyle.dark
          : SystemUiOverlayStyle.light;

  return AppBar(
    key: properties.getKey(params.id),
    foregroundColor: tryParseColor(params.props["foregroundColor"]),
    backgroundColor: backgroundColor,
    surfaceTintColor:
        tryParseColor(params.props["surfaceTintColor"]) ?? backgroundColor,
    shadowColor: tryParseColor(params.props["shadowColor"]),
    systemOverlayStyle: systemUiOverlayStyle,
    leading: leading,
    title: title,
    automaticallyImplyLeading: parseBool(
        params.props["automaticallyImplyLeading"],
        defaultValue: true),
    centerTitle: tryParseBool(params.props["centerTitle"]),
    elevation: tryParseDouble(params.props["elevation"]),
    scrolledUnderElevation:
        tryParseDouble(params.props["scrolledUnderElevation"]),
    bottom: bottom != null ? bottom as PreferredSizeWidget : null,
    bottomOpacity:
        parseDouble(params.props["bottomOpacity"], defaultValue: 1),
    toolbarHeight: tryParseDouble(params.props["toolbarHeight"]),
    toolbarOpacity:
        parseDouble(params.props["toolbarOpacity"], defaultValue: 1),
    actions: actions,
  );
}