CanvasRenderingContext class
A rendering context for a canvas element.
This context is extended by CanvasRenderingContext2D and
WebGLRenderingContext.
@DocsEditable
/**
* A rendering context for a canvas element.
*
* This context is extended by [CanvasRenderingContext2D] and
* [WebGLRenderingContext].
*/
@DomName('CanvasRenderingContext')
class CanvasRenderingContext native "CanvasRenderingContext" {
/// Reference to the canvas element to which this context belongs.
@DomName('CanvasRenderingContext.canvas')
@DocsEditable
final CanvasElement canvas;
}
Extends
Interceptor > CanvasRenderingContext
Subclasses
CanvasRenderingContext2D, RenderingContext
Properties
final CanvasElement canvas #
Reference to the canvas element to which this context belongs.
final CanvasElement canvas
final int hashCode #
Get a hash code for this object.
All objects have hash codes. Hash codes are guaranteed to be the
same for objects that are equal when compared using the equality
operator ==. Other than that there are no guarantees about
the hash codes. They will not be consistent between runs and
there are no distribution guarantees.
If a subclass overrides hashCode it should override the
equality operator as well to maintain consistency.
int get hashCode => Primitives.objectHashCode(this);
Operators
bool operator ==(other) #
The equality operator.
The default behavior for all Objects is to return true if and
only if this and
other are the same object.
If a subclass overrides the equality operator it should override
the hashCode method as well to maintain consistency.
bool operator ==(other) => identical(this, other);
Methods
dynamic noSuchMethod(Invocation invocation) #
noSuchMethod is invoked when users invoke a non-existant method
on an object. The name of the method and the arguments of the
invocation are passed to noSuchMethod in an Invocation.
If noSuchMethod returns a value, that value becomes the result of
the original invocation.
The default behavior of noSuchMethod is to throw a
noSuchMethodError.
dynamic noSuchMethod(Invocation invocation) {
throw new NoSuchMethodError(
this,
_symbolToString(invocation.memberName),
invocation.positionalArguments,
_symbolMapToStringMap(invocation.namedArguments));
}