Module javafx.graphics
Package javafx.scene.shape

Class Shape

java.lang.Object
javafx.scene.Node
javafx.scene.shape.Shape
All Implemented Interfaces:
Styleable, EventTarget
Direct Known Subclasses:
Arc, Circle, CubicCurve, Ellipse, Line, Path, Polygon, Polyline, QuadCurve, Rectangle, SVGPath, Text
public abstract class Shape extends Node
The Shape class provides definitions of common properties for objects that represent some form of geometric shape. These properties include:
  • The Paint to be applied to the fillable interior of the shape (see setFill).
  • The Paint to be applied to stroke the outline of the shape (see setStroke).
  • The decorative properties of the stroke, including:
    • The width of the border stroke.
    • Whether the border is drawn as an exterior padding to the edges of the shape, as an interior edging that follows the inside of the border, or as a wide path that follows along the border straddling it equally both inside and outside (see StrokeType).
    • Decoration styles for the joins between path segments and the unclosed ends of paths.
    • Dashing attributes.

An application should not extend the Shape class directly. Doing so may lead to an UnsupportedOperationException being thrown.

Interaction with coordinate systems

Most nodes tend to have only integer translations applied to them and quite often they are defined using integer coordinates as well. For this common case, fills of shapes with straight line edges tend to be crisp since they line up with the cracks between pixels that fall on integer device coordinates and thus tend to naturally cover entire pixels.

On the other hand, stroking those same shapes can often lead to fuzzy outlines because the default stroking attributes specify both that the default stroke width is 1.0 coordinates which often maps to exactly 1 device pixel and also that the stroke should straddle the border of the shape, falling half on either side of the border. Since the borders in many common shapes tend to fall directly on integer coordinates and those integer coordinates often map precisely to integer device locations, the borders tend to result in 50% coverage over the pixel rows and columns on either side of the border of the shape rather than 100% coverage on one or the other. Thus, fills may typically be crisp, but strokes are often fuzzy.

Two common solutions to avoid these fuzzy outlines are to use wider strokes that cover more pixels completely - typically a stroke width of 2.0 will achieve this if there are no scale transforms in effect - or to specify either the StrokeType.INSIDE or StrokeType.OUTSIDE stroke styles - which will bias the default single unit stroke onto one of the full pixel rows or columns just inside or outside the border of the shape.

Since:
JavaFX 2.0

  • Property Details

    • strokeType

      public final ObjectProperty<StrokeType> strokeTypeProperty
      Defines the direction (inside, centered, or outside) that the strokeWidth is applied to the boundary of the shape.

      The image shows a shape without stroke and with a thick stroke applied inside, centered and outside.

      A visual illustration of how StrokeType works

      Default value:
      CENTERED
      See Also:

    • strokeWidth

      public final DoubleProperty strokeWidthProperty
      Defines a square pen line width. A value of 0.0 specifies a hairline stroke. A value of less than 0.0 will be treated as 0.0.
      Default value:
      1.0
      See Also:

    • strokeLineJoin

      public final ObjectProperty<StrokeLineJoin> strokeLineJoinProperty
      Defines the decoration applied where path segments meet. The value must have one of the following values: StrokeLineJoin.MITER, StrokeLineJoin.BEVEL, and StrokeLineJoin.ROUND. The image shows a shape using the values in the mentioned order.

      A visual illustration of StrokeLineJoin using 3 different values

      Default value:
      MITER
      See Also:

    • strokeLineCap

      public final ObjectProperty<StrokeLineCap> strokeLineCapProperty
      The end cap style of this Shape as one of the following values that define possible end cap styles: StrokeLineCap.BUTT, StrokeLineCap.ROUND, and StrokeLineCap.SQUARE. The image shows a line using the values in the mentioned order.

      A visual illustration of StrokeLineCap using 3 different values

      Default value:
      SQUARE
      See Also:

    • strokeMiterLimit

      public final DoubleProperty strokeMiterLimitProperty
      Defines the limit for the StrokeLineJoin.MITER line join style. A value of less than 1.0 will be treated as 1.0.

      The image demonstrates the behavior. Miter length (A) is computed as the distance of the most inside point to the most outside point of the joint, with the stroke width as a unit. If the miter length is bigger than the given miter limit, the miter is cut at the edge of the shape (B). For the situation in the image it means that the miter will be cut at B for limit values less than 4.65.

      A visual illustration of the use of StrokeMiterLimit

      Default value:
      10.0
      See Also:

    • strokeDashOffset

      public final DoubleProperty strokeDashOffsetProperty
      Defines a distance specified in user coordinates that represents an offset into the dashing pattern. In other words, the dash phase defines the point in the dashing pattern that will correspond to the beginning of the stroke.

      The image shows a stroke with dash array [25, 20, 5, 20] and a stroke with the same pattern and offset 45 which shifts the pattern about the length of the first dash segment and the following space.

      A visual illustration of the use of StrokeDashOffset

      Default value:
      0
      See Also:

    • fill

      public final ObjectProperty<Paint> fillProperty
      Defines parameters to fill the interior of an Shape using the settings of the Paint context. The default value is Color.BLACK for all shapes except Line, Polyline, and Path. The default value is null for those shapes.
      See Also:

    • stroke

      public final ObjectProperty<Paint> strokeProperty
      Defines parameters of a stroke that is drawn around the outline of a Shape using the settings of the specified Paint. The default value is null for all shapes except Line, Polyline, and Path. The default value is Color.BLACK for those shapes.
      See Also:

    • smooth

      public final BooleanProperty smoothProperty
      Defines whether antialiasing hints are used or not for this Shape. If the value equals true the rendering hints are applied.
      Default value:
      true
      See Also:

  • Constructor Details

    • Shape

      public Shape()
      Creates an empty instance of Shape.

  • Method Details

    • setStrokeType

      public final void setStrokeType(StrokeType value)
      Sets the value of the property strokeType.
      Property description:
      Defines the direction (inside, centered, or outside) that the strokeWidth is applied to the boundary of the shape.

      The image shows a shape without stroke and with a thick stroke applied inside, centered and outside.

      A visual illustration of how StrokeType works

      Default value:
      CENTERED

    • getStrokeType

      public final StrokeType getStrokeType()
      Gets the value of the property strokeType.
      Property description:
      Defines the direction (inside, centered, or outside) that the strokeWidth is applied to the boundary of the shape.

      The image shows a shape without stroke and with a thick stroke applied inside, centered and outside.

      A visual illustration of how StrokeType works

      Default value:
      CENTERED

    • strokeTypeProperty

      public final ObjectProperty<StrokeType> strokeTypeProperty()
      Defines the direction (inside, centered, or outside) that the strokeWidth is applied to the boundary of the shape.

      The image shows a shape without stroke and with a thick stroke applied inside, centered and outside.

      A visual illustration of how StrokeType works

      Default value:
      CENTERED
      See Also:

    • setStrokeWidth

      public final void setStrokeWidth(double value)
      Sets the value of the property strokeWidth.
      Property description:
      Defines a square pen line width. A value of 0.0 specifies a hairline stroke. A value of less than 0.0 will be treated as 0.0.
      Default value:
      1.0

    • getStrokeWidth

      public final double getStrokeWidth()
      Gets the value of the property strokeWidth.
      Property description:
      Defines a square pen line width. A value of 0.0 specifies a hairline stroke. A value of less than 0.0 will be treated as 0.0.
      Default value:
      1.0

    • strokeWidthProperty

      public final DoubleProperty strokeWidthProperty()
      Defines a square pen line width. A value of 0.0 specifies a hairline stroke. A value of less than 0.0 will be treated as 0.0.
      Default value:
      1.0
      See Also:

    • setStrokeLineJoin

      public final void setStrokeLineJoin(StrokeLineJoin value)
      Sets the value of the property strokeLineJoin.
      Property description:
      Defines the decoration applied where path segments meet. The value must have one of the following values: StrokeLineJoin.MITER, StrokeLineJoin.BEVEL, and StrokeLineJoin.ROUND. The image shows a shape using the values in the mentioned order.

      A visual illustration of StrokeLineJoin using 3 different values

      Default value:
      MITER

    • getStrokeLineJoin

      public final StrokeLineJoin getStrokeLineJoin()
      Gets the value of the property strokeLineJoin.
      Property description:
      Defines the decoration applied where path segments meet. The value must have one of the following values: StrokeLineJoin.MITER, StrokeLineJoin.BEVEL, and StrokeLineJoin.ROUND. The image shows a shape using the values in the mentioned order.

      A visual illustration of StrokeLineJoin using 3 different values

      Default value:
      MITER

    • strokeLineJoinProperty

      public final ObjectProperty<StrokeLineJoin> strokeLineJoinProperty()
      Defines the decoration applied where path segments meet. The value must have one of the following values: StrokeLineJoin.MITER, StrokeLineJoin.BEVEL, and StrokeLineJoin.ROUND. The image shows a shape using the values in the mentioned order.

      A visual illustration of StrokeLineJoin using 3 different values

      Default value:
      MITER
      See Also:

    • setStrokeLineCap

      public final void setStrokeLineCap(StrokeLineCap value)
      Sets the value of the property strokeLineCap.
      Property description:
      The end cap style of this Shape as one of the following values that define possible end cap styles: StrokeLineCap.BUTT, StrokeLineCap.ROUND, and StrokeLineCap.SQUARE. The image shows a line using the values in the mentioned order.

      A visual illustration of StrokeLineCap using 3 different values

      Default value:
      SQUARE

    • getStrokeLineCap

      public final StrokeLineCap getStrokeLineCap()
      Gets the value of the property strokeLineCap.
      Property description:
      The end cap style of this Shape as one of the following values that define possible end cap styles: StrokeLineCap.BUTT, StrokeLineCap.ROUND, and StrokeLineCap.SQUARE. The image shows a line using the values in the mentioned order.

      A visual illustration of StrokeLineCap using 3 different values

      Default value:
      SQUARE

    • strokeLineCapProperty

      public final ObjectProperty<StrokeLineCap> strokeLineCapProperty()
      The end cap style of this Shape as one of the following values that define possible end cap styles: StrokeLineCap.BUTT, StrokeLineCap.ROUND, and StrokeLineCap.SQUARE. The image shows a line using the values in the mentioned order.

      A visual illustration of StrokeLineCap using 3 different values

      Default value:
      SQUARE
      See Also:

    • setStrokeMiterLimit

      public final void setStrokeMiterLimit(double value)
      Sets the value of the property strokeMiterLimit.
      Property description:
      Defines the limit for the StrokeLineJoin.MITER line join style. A value of less than 1.0 will be treated as 1.0.

      The image demonstrates the behavior. Miter length (A) is computed as the distance of the most inside point to the most outside point of the joint, with the stroke width as a unit. If the miter length is bigger than the given miter limit, the miter is cut at the edge of the shape (B). For the situation in the image it means that the miter will be cut at B for limit values less than 4.65.

      A visual illustration of the use of StrokeMiterLimit

      Default value:
      10.0

    • getStrokeMiterLimit

      public final double getStrokeMiterLimit()
      Gets the value of the property strokeMiterLimit.
      Property description:
      Defines the limit for the StrokeLineJoin.MITER line join style. A value of less than 1.0 will be treated as 1.0.

      The image demonstrates the behavior. Miter length (A) is computed as the distance of the most inside point to the most outside point of the joint, with the stroke width as a unit. If the miter length is bigger than the given miter limit, the miter is cut at the edge of the shape (B). For the situation in the image it means that the miter will be cut at B for limit values less than 4.65.

      A visual illustration of the use of StrokeMiterLimit

      Default value:
      10.0

    • strokeMiterLimitProperty

      public final DoubleProperty strokeMiterLimitProperty()
      Defines the limit for the StrokeLineJoin.MITER line join style. A value of less than 1.0 will be treated as 1.0.

      The image demonstrates the behavior. Miter length (A) is computed as the distance of the most inside point to the most outside point of the joint, with the stroke width as a unit. If the miter length is bigger than the given miter limit, the miter is cut at the edge of the shape (B). For the situation in the image it means that the miter will be cut at B for limit values less than 4.65.

      A visual illustration of the use of StrokeMiterLimit

      Default value:
      10.0
      See Also:

    • setStrokeDashOffset

      public final void setStrokeDashOffset(double value)
      Sets the value of the property strokeDashOffset.
      Property description:
      Defines a distance specified in user coordinates that represents an offset into the dashing pattern. In other words, the dash phase defines the point in the dashing pattern that will correspond to the beginning of the stroke.

      The image shows a stroke with dash array [25, 20, 5, 20] and a stroke with the same pattern and offset 45 which shifts the pattern about the length of the first dash segment and the following space.

      A visual illustration of the use of StrokeDashOffset

      Default value:
      0

    • getStrokeDashOffset

      public final double getStrokeDashOffset()
      Gets the value of the property strokeDashOffset.
      Property description:
      Defines a distance specified in user coordinates that represents an offset into the dashing pattern. In other words, the dash phase defines the point in the dashing pattern that will correspond to the beginning of the stroke.

      The image shows a stroke with dash array [25, 20, 5, 20] and a stroke with the same pattern and offset 45 which shifts the pattern about the length of the first dash segment and the following space.

      A visual illustration of the use of StrokeDashOffset

      Default value:
      0

    • strokeDashOffsetProperty

      public final DoubleProperty strokeDashOffsetProperty()
      Defines a distance specified in user coordinates that represents an offset into the dashing pattern. In other words, the dash phase defines the point in the dashing pattern that will correspond to the beginning of the stroke.

      The image shows a stroke with dash array [25, 20, 5, 20] and a stroke with the same pattern and offset 45 which shifts the pattern about the length of the first dash segment and the following space.

      A visual illustration of the use of StrokeDashOffset

      Default value:
      0
      See Also:

    • getStrokeDashArray

      public final ObservableList<Double> getStrokeDashArray()
      Defines the array representing the lengths of the dash segments. Alternate entries in the array represent the user space lengths of the opaque and transparent segments of the dashes. As the pen moves along the outline of the Shape to be stroked, the user space distance that the pen travels is accumulated. The distance value is used to index into the dash array. The pen is opaque when its current cumulative distance maps to an even element of the dash array (counting from 0) and transparent otherwise.

      An empty strokeDashArray indicates a solid line with no spaces. An odd length strokeDashArray behaves the same as an even length array constructed by implicitly repeating the indicated odd length array twice in succession ([20, 5, 15] behaves as if it were [20, 5, 15, 20, 5, 15]).

      Note that each dash segment will be capped by the decoration specified by the current stroke line cap.

      The image shows a shape with stroke dash array [25, 20, 5, 20] and 3 different values for the stroke line cap: StrokeLineCap.BUTT, StrokeLineCap.SQUARE (the default), and StrokeLineCap.ROUND

      A visual illustration of the use of StrokeDashArray using 3 different values for the stroke line cap

      Default value:
      empty
      Returns:
      the array representing the lengths of the dash segments

    • setFill

      public final void setFill(Paint value)
      Sets the value of the property fill.
      Property description:
      Defines parameters to fill the interior of an Shape using the settings of the Paint context. The default value is Color.BLACK for all shapes except Line, Polyline, and Path. The default value is null for those shapes.

    • getFill

      public final Paint getFill()
      Gets the value of the property fill.
      Property description:
      Defines parameters to fill the interior of an Shape using the settings of the Paint context. The default value is Color.BLACK for all shapes except Line, Polyline, and Path. The default value is null for those shapes.

    • fillProperty

      public final ObjectProperty<Paint> fillProperty()
      Defines parameters to fill the interior of an Shape using the settings of the Paint context. The default value is Color.BLACK for all shapes except Line, Polyline, and Path. The default value is null for those shapes.
      See Also:

    • setStroke

      public final void setStroke(Paint value)
      Sets the value of the property stroke.
      Property description:
      Defines parameters of a stroke that is drawn around the outline of a Shape using the settings of the specified Paint. The default value is null for all shapes except Line, Polyline, and Path. The default value is Color.BLACK for those shapes.

    • getStroke

      public final Paint getStroke()
      Gets the value of the property stroke.
      Property description:
      Defines parameters of a stroke that is drawn around the outline of a Shape using the settings of the specified Paint. The default value is null for all shapes except Line, Polyline, and Path. The default value is Color.BLACK for those shapes.

    • strokeProperty

      public final ObjectProperty<Paint> strokeProperty()
      Defines parameters of a stroke that is drawn around the outline of a Shape using the settings of the specified Paint. The default value is null for all shapes except Line, Polyline, and Path. The default value is Color.BLACK for those shapes.
      See Also:

    • setSmooth

      public final void setSmooth(boolean value)
      Sets the value of the property smooth.
      Property description:
      Defines whether antialiasing hints are used or not for this Shape. If the value equals true the rendering hints are applied.
      Default value:
      true

    • isSmooth

      public final boolean isSmooth()
      Gets the value of the property smooth.
      Property description:
      Defines whether antialiasing hints are used or not for this Shape. If the value equals true the rendering hints are applied.
      Default value:
      true

    • smoothProperty

      public final BooleanProperty smoothProperty()
      Defines whether antialiasing hints are used or not for this Shape. If the value equals true the rendering hints are applied.
      Default value:
      true
      See Also:

    • getClassCssMetaData

      public static List<CssMetaData<? extends Styleable,?>> getClassCssMetaData()
      Gets the CssMetaData associated with this class, which may include the CssMetaData of its superclasses.
      Returns:
      the CssMetaData
      Since:
      JavaFX 8.0

    • getCssMetaData

      public List<CssMetaData<? extends Styleable,?>> getCssMetaData()
      This method should delegate to Node.getClassCssMetaData() so that a Node's CssMetaData can be accessed without the need for reflection.
      Specified by:
      getCssMetaData in interface Styleable
      Overrides:
      getCssMetaData in class Node
      Returns:
      The CssMetaData associated with this node, which may include the CssMetaData of its superclasses.
      Since:
      JavaFX 8.0

    • union

      public static Shape union(Shape shape1, Shape shape2)
      Returns a new Shape which is created as a union of the specified input shapes.

      The operation works with geometric areas occupied by the input shapes. For a single Shape such area includes the area occupied by the fill if the shape has a non-null fill and the area occupied by the stroke if the shape has a non-null stroke. So the area is empty for a shape with null stroke and null fill. The area of an input shape considered by the operation is independent on the type and configuration of the paint used for fill or stroke. Before the final operation the areas of the input shapes are transformed to the parent coordinate space of their respective topmost parent nodes.

      The resulting shape will include areas that were contained in any of the input shapes. 

      
         shape1       +       shape2       =       result
   +----------------+   +----------------+   +----------------+
   |################|   |################|   |################|
   |##############  |   |  ##############|   |################|
   |############    |   |    ############|   |################|
   |##########      |   |      ##########|   |################|
   |########        |   |        ########|   |################|
   |######          |   |          ######|   |######    ######|
   |####            |   |            ####|   |####        ####|
   |##              |   |              ##|   |##            ##|
   +----------------+   +----------------+   +----------------+
      Parameters:
      shape1 - the first shape
      shape2 - the second shape
      Returns:
      the created Shape

    • subtract

      public static Shape subtract(Shape shape1, Shape shape2)
      Returns a new Shape which is created by subtracting the specified second shape from the first shape.

      The operation works with geometric areas occupied by the input shapes. For a single Shape such area includes the area occupied by the fill if the shape has a non-null fill and the area occupied by the stroke if the shape has a non-null stroke. So the area is empty for a shape with null stroke and null fill. The area of an input shape considered by the operation is independent on the type and configuration of the paint used for fill or stroke. Before the final operation the areas of the input shapes are transformed to the parent coordinate space of their respective topmost parent nodes.

      The resulting shape will include areas that were contained only in the first shape and not in the second shape. 

      
         shape1       -       shape2       =       result
   +----------------+   +----------------+   +----------------+
   |################|   |################|   |                |
   |##############  |   |  ##############|   |##              |
   |############    |   |    ############|   |####            |
   |##########      |   |      ##########|   |######          |
   |########        |   |        ########|   |########        |
   |######          |   |          ######|   |######          |
   |####            |   |            ####|   |####            |
   |##              |   |              ##|   |##              |
   +----------------+   +----------------+   +----------------+
      Parameters:
      shape1 - the first shape
      shape2 - the second shape
      Returns:
      the created Shape

    • intersect

      public static Shape intersect(Shape shape1, Shape shape2)
      Returns a new Shape which is created as an intersection of the specified input shapes.

      The operation works with geometric areas occupied by the input shapes. For a single Shape such area includes the area occupied by the fill if the shape has a non-null fill and the area occupied by the stroke if the shape has a non-null stroke. So the area is empty for a shape with null stroke and null fill. The area of an input shape considered by the operation is independent on the type and configuration of the paint used for fill or stroke. Before the final operation the areas of the input shapes are transformed to the parent coordinate space of their respective topmost parent nodes.

      The resulting shape will include only areas that were contained in both of the input shapes. 

      
         shape1       +       shape2       =       result
   +----------------+   +----------------+   +----------------+
   |################|   |################|   |################|
   |##############  |   |  ##############|   |  ############  |
   |############    |   |    ############|   |    ########    |
   |##########      |   |      ##########|   |      ####      |
   |########        |   |        ########|   |                |
   |######          |   |          ######|   |                |
   |####            |   |            ####|   |                |
   |##              |   |              ##|   |                |
   +----------------+   +----------------+   +----------------+
      Parameters:
      shape1 - the first shape
      shape2 - the second shape
      Returns:
      the created Shape