CanvasRenderingContext2D 类
- 实现类型
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- 注解
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- @Native("CanvasRenderingContext2D")
方法
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addHitRegion([Map? options]) → void
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arc(num x, num y, num radius, num startAngle, num endAngle, [bool anticlockwise = false]) → void
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arcTo(num x1, num y1, num x2, num y2, num radius) → void
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beginPath() → void
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bezierCurveTo(num cp1x, num cp1y, num cp2x, num cp2y, num x, num y) → void
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clearHitRegions() → void
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clearRect(num x, num y, num width, num height) → void
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clip([dynamic path_OR_winding, String? winding]) → void
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closePath() → void
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createImageData(dynamic data_OR_imagedata_OR_sw, [int? sh_OR_sw, dynamic imageDataColorSettings_OR_sh, Map? imageDataColorSettings]) → ImageData
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createImageDataFromImageData(ImageData imagedata) → ImageData
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createLinearGradient(num x0, num y0, num x1, num y1) → CanvasGradient
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createPattern(Object image, String repetitionType) → CanvasPattern?
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createPatternFromImage(ImageElement image, String repetitionType) → CanvasPattern
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createRadialGradient(num x0, num y0, num r0, num x1, num y1, num r1) → CanvasGradient
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drawFocusIfNeeded(dynamic element_OR_path, [Element? element]) → void
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drawImage(CanvasImageSource source, num destX, num destY) → void
- 从 CanvasImageSource 到此画布绘制图像。
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drawImageScaled(CanvasImageSource source, num destX, num destY, num destWidth, num destHeight) → void
- 从 CanvasImageSource 到此画布的某个区域绘制图像。
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drawImageScaledFromSource(CanvasImageSource source, num sourceX, num sourceY, num sourceWidth, num sourceHeight, num destX, num destY, num destWidth, num destHeight) → void
- 从 CanvasImageSource 到此画布的某个区域绘制图像。
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drawImageToRect(CanvasImageSource source, Rectangle<num> destRect, {Rectangle<num>? sourceRect}) → void
- 从 CanvasImageSource 到此画布的某个区域绘制图像。
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ellipse(num x, num y, num radiusX, num radiusY, num rotation, num startAngle, num endAngle, bool? anticlockwise) → void
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fill([dynamic path_OR_winding, String? winding]) → void
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fillRect(num x, num y, num width, num height) → void
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fillText(String text, num x, num y, [num? maxWidth]) → void
- 在画布上绘制文本。
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getContextAttributes() → Map
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getImageData(int sx, int sy, int sw, int sh) → ImageData
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getLineDash() → List<num>
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isContextLost() → bool
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isPointInPath(dynamic path_OR_x, num x_OR_y, [dynamic winding_OR_y, String? winding]) → bool
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isPointInStroke(dynamic path_OR_x, num x_OR_y, [num? y]) → bool
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lineTo(num x, num y) → void
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measureText(String text) → TextMetrics
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moveTo(num x, num y) → void
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noSuchMethod(Invocation invocation) → dynamic
- 调用不存在的方法或属性时触发。
继承
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putImageData(ImageData imagedata, int dx, int dy, [int? dirtyX, int? dirtyY, int? dirtyWidth, int? dirtyHeight]) → void
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quadraticCurveTo(num cpx, num cpy, num x, num y) → void
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rect(num x, num y, num width, num height) → void
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removeHitRegion(String id) → void
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resetTransform() → void
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restore() → void
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rotate(num angle) → void
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save() → void
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scale(num x, num y) → void
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scrollPathIntoView([Path2D? path]) → void
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setFillColorHsl(int h, num s, num l, [num a = 1]) → void
- 设置形状内部的填充颜色。参数
h 以度为单位，取值范围为 0-360。参数 s 和 l 以百分比为单位，取值范围为 0-100。参数 a 取值范围为 0-1。
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setFillColorRgb(int r, int g, int b, [num a = 1]) → void
- 设置形状内部的填充颜色。参数
r、g 和 b 的取值范围为 0-255，参数 a 的取值范围为 0-1。
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setLineDash(List<num> dash) → void
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setStrokeColorHsl(int h, num s, num l, [num a = 1]) → void
- 设置用于描边形状的颜色。参数
h 以度为单位，取值范围为 0-360。参数 s 和 l 以百分比为单位，取值范围为 0-100。参数 a 取值范围为 0-1。
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setStrokeColorRgb(int r, int g, int b, [num a = 1]) → void
- 设置用于描边形状的颜色。参数
r、g 和 b 的取值范围为 0-255，参数 a 的取值范围为 0-1。
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setTransform(num a, num b, num c, num d, num e, num f) → void
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stroke([Path2D? path]) → void
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strokeRect(num x, num y, num width, num height) → void
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strokeText(String text, num x, num y, [num? maxWidth]) → void
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toString() → String
- 该对象的字符串表示。
继承
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transform(num a, num b, num c, num d, num e, num f) → void
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translate(num x, num y) → void
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