AnimatedContainer constructor

AnimatedContainer({Key key, AlignmentGeometry alignment, EdgeInsetsGeometry padding, Color color, Decoration decoration, Decoration foregroundDecoration, double width, double height, BoxConstraints constraints, EdgeInsetsGeometry margin, Matrix4 transform, Widget child, Curve curve: Curves.linear, @required Duration duration })

Creates a container that animates its parameters implicitly.

The curve and duration arguments must not be null.

Implementation 

AnimatedContainer({
  Key key,
  this.alignment,
  this.padding,
  Color color,
  Decoration decoration,
  this.foregroundDecoration,
  double width,
  double height,
  BoxConstraints constraints,
  this.margin,
  this.transform,
  this.child,
  Curve curve = Curves.linear,
  @required Duration duration,
}) : assert(margin == null || margin.isNonNegative),
     assert(padding == null || padding.isNonNegative),
     assert(decoration == null || decoration.debugAssertIsValid()),
     assert(constraints == null || constraints.debugAssertIsValid()),
     assert(color == null || decoration == null,
       'Cannot provide both a color and a decoration\n'
       'The color argument is just a shorthand for "decoration: new BoxDecoration(backgroundColor: color)".'
     ),
     decoration = decoration ?? (color != null ? BoxDecoration(color: color) : null),
     constraints =
      (width != null || height != null)
        ? constraints?.tighten(width: width, height: height)
          ?? BoxConstraints.tightFor(width: width, height: height)
        : constraints,
     super(key: key, curve: curve, duration: duration);