Decoration class - widgets library

A description of a box decoration (a decoration applied to a Rect).

This class presents the abstract interface for all decorations. See BoxDecoration for a concrete example.

To actually paint a Decoration, use the createBoxPainter method to obtain a BoxPainter. Decoration objects can be shared between boxes; BoxPainter objects can cache resources to make painting on a particular surface faster.

Static Methods

lerp(Decoration begin, Decoration end, double t) → Decoration: Linearly interpolates from begin to end.

Decoration(): Abstract const constructor. This constructor enables subclasses to provide const constructors so that they can be used in const expressions.

const

isComplex → bool: Whether this decoration is complex enough to benefit from caching its painting.

read-only
padding → EdgeInsets: Returns the insets to apply when using this decoration on a box that has contents, so that the contents do not overlap the edges of the decoration. For example, if the decoration draws a frame around its edge, the padding would return the distance by which to inset the children so as to not overlap the frame.

read-only
hashCode → int: Get a hash code for this object.

read-only, inherited
runtimeType → Type: A representation of the runtime type of the object.

read-only, inherited

createBoxPainter([VoidCallback onChanged ]) → BoxPainter: Returns a BoxPainter that will paint this decoration.
debugAssertIsValid() → bool: In checked mode, throws an exception if the object is not in a valid configuration. Otherwise, returns true.
hitTest(Size size, Point position) → bool: Tests whether the given point, on a rectangle of a given size, would be considered to hit the decoration or not. For example, if the decoration only draws a circle, this function might return true if the point was inside the circle and false otherwise.
lerpFrom(Decoration a, double t) → Decoration: Linearly interpolates from a to this.
lerpTo(Decoration b, double t) → Decoration: Linearly interpolates from this to b.
toString([String prefix = '', String indentPrefix ]) → String: Returns a string representation of this object.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a non-existent method or property is accessed.

inherited