CanvasPattern class
An opaque object representing a pattern of image, canvas, or video.
Created by calling createPattern on a CanvasRenderingContext2D object.
Example usage:
var canvas = new CanvasElement(width: 600, height: 600);
var ctx = canvas.context2D;
var img = new ImageElement();
// Image src needs to be loaded before pattern is applied.
img.onLoad.listen((event) {
// When the image is loaded, create a pattern
// from the ImageElement.
CanvasPattern pattern = ctx.createPattern(img, 'repeat');
ctx.rect(0, 0, canvas.width, canvas.height);
ctx.fillStyle = pattern;
ctx.fill();
});
img.src = "images/foo.jpg";
document.body.children.add(canvas);
See also: CanvasPattern from MDN. CanvasPattern from whatwg. * CanvasPattern from W3C.
@DocsEditable
/**
* An opaque object representing a pattern of image, canvas, or video.
*
* Created by calling [createPattern] on a [CanvasRenderingContext2D] object.
*
* Example usage:
*
* var canvas = new CanvasElement(width: 600, height: 600);
* var ctx = canvas.context2D;
* var img = new ImageElement();
* // Image src needs to be loaded before pattern is applied.
* img.onLoad.listen((event) {
* // When the image is loaded, create a pattern
* // from the ImageElement.
* CanvasPattern pattern = ctx.createPattern(img, 'repeat');
* ctx.rect(0, 0, canvas.width, canvas.height);
* ctx.fillStyle = pattern;
* ctx.fill();
* });
* img.src = "images/foo.jpg";
* document.body.children.add(canvas);
*
* See also:
* * [CanvasPattern](https://developer.mozilla.org/en-US/docs/DOM/CanvasPattern) from MDN.
* * [CanvasPattern](http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#canvaspattern) from whatwg.
* * [CanvasPattern](http://www.w3.org/TR/2010/WD-2dcontext-20100304/#canvaspattern) from W3C.
*/
@DomName('CanvasPattern')
class CanvasPattern native "CanvasPattern" {
}
Extends
Interceptor > CanvasPattern
Properties
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));
}