ClipPath Class

Article
08/03/2013

Shape Clipping Path.When the object is serialized out as xml, its qualified name is o:clippath.

Inheritance Hierarchy

System.Object
  DocumentFormat.OpenXml.OpenXmlElement
    DocumentFormat.OpenXml.OpenXmlLeafElement
      DocumentFormat.OpenXml.Vml.Office.ClipPath

Namespace: DocumentFormat.OpenXml.Vml.Office
Assembly: DocumentFormat.OpenXml (in DocumentFormat.OpenXml.dll)

Syntax

'Declaration
Public Class ClipPath _
    Inherits OpenXmlLeafElement
'Usage
Dim instance As ClipPath

public class ClipPath : OpenXmlLeafElement

Remarks

[ISO/IEC 29500-1 1st Edition]

14.2.2.3 clippath (Shape Clipping Path)

This element specifies the path of the clipping polygon for the shape.

[Example:

<v:rect … wrapcoords="-207 -433 -207 21925 21807 21925 21807 -433 -207 -433" o:clip="t" o:cliptowrap="t">
  <o:clippath o:v="m-207,-433r,22358l21807,21925r,-22358l-207,-433xe"/>
</v:rect>

end example]

Parent Elements
arc (§14.1.2.1); background (Part 1, §17.2.1); curve (§14.1.2.3); group (§14.1.2.7); hdrShapeDefaults (§9.7.2.1); image (§14.1.2.10); line (§14.1.2.12); object (Part 1, §17.3.3.19); oval (§14.1.2.13); pict (§9.2.2.2); pict (§9.5.1); polyline (§14.1.2.15); rect (§14.1.2.16); roundrect (§14.1.2.17); shape (§14.1.2.19); shapeDefaults (§9.7.2.2); shapetype (§14.1.2.20)

Attributes	Description
v (Path Definition)	Specifies a string containing the commands that define the shape's path. This value consists of commands followed by zero or more parameters. Default is no value. The following rules apply to path strings: Commas or spaces delimit parameters for each command. Both "m 0,0" and "m0 0" are acceptable. A parameter that is omitted using commas is treated as having a value of zero. Thus, "c 10,10,0,0,25,13" and "c 10,10,,,25,13" are equivalent. Parameterized paths are also allowed. In this case, the shape shall also have a formulas element (§14.1.2.6) with a list of formulas that are substituted into the path using the @ symbol followed by the number of the formula. The adj property of the shape contains the input parameters for these formulas. For example, "moveto @1@4". The evaluations of the formulas are substituted into the appropriate positions. @ also serves as a delimiter. The allowed commands are given below. An asterisk () indicates that the command is allowed to be repeated. For the qb command, the controlpoint parameter is also allowed to be repeated. Command Name Parameters Description m moveto 2 Start a new sub-path at the given (x,y) coordinate. l lineto 2 Draw a line from the current point to the given (x,y) coordinate which becomes the new current point. Specifying a number of coordinate pairs forms a polyline. c curveto 6* Draw a cubic bézier curve from the current point to the coordinate given by the final two parameters. The control points are given by the first four parameters. x close 0 Close the current sub-path by drawing a straight line from the current point to the original moveto point. e end 0 End the current set of sub-paths. A given set of sub-paths (as delimited by end) is filled. Subsequent sets of sub-paths are filled independently and superimposed on existing ones. t rmoveto 2* Start a new sub-path at a coordinate relative to the current point, cp (cpx+x, cpy+y). r rlineto 2* Draw a line from the current point to the given relative coordinate (cpx+x, cpy+y). v rcurveto 6* Cubic bézier curve using the given coordinate relative to the current point. nf nofill 0 The current set of sub-paths (delimited by e) is not filled. ns nostroke 0 The current set of sub-paths (delimited by e) is not stroked. ae angleellipseto 6* Draws a segment of an ellipse as described using these parameters. A straight line is drawn from the current point to the start point of the segment. The parameters are: center (x,y), size(w,h), start angle, end angle. al angleellipse 6* Same as angleellipseto except that there is an implied moveto the starting point of the segment. at arcto 8* A segment of the ellipse is drawn which starts at the angle defined by the start radius vector and ends at the angle defined by the end vector. A straight line is drawn from the current point to the start of the arc. The arc is always drawn in a counterclockwise direction. The parameters are: left, top, right, bottom, start(x,y), end(x,y). The first four values define the bounding box of an ellipse. The last four define two radial vectors. ar arc 8* Same as arcto except there is an implied moveto the start point of the arc. wa clockwisearcto 8* Same as arcto but the arc is drawn in a clockwise direction. wr clockwisearc 8* Same as arc but the arc is drawn in a clockwise direction qx ellipticalqaudrantx 2* A quarter ellipse is drawn from the current point to the given end point. The elliptical segment is initially tangential to a line parallel to the x-axis. (i.e. the segment starts out horizontal). The parameters are: end(x,y). qy ellipticalquadranty 2* Same as ellipticalquadrantx except that the elliptical segment is initially tangential to a line parallel to the y-axis (i.e. the segment starts out vertical). qb quadraticbezier 2+2* Defines one or more quadratic bézier curves by means of control points and an end point. Intermediate (on-curve) points are obtained by interpolation between successive control points as in the OpenType font specification. The sub-path need not be started in which case the sub-path is closed. In this case the last point of the sub-path defines the start point of the quadratic bézier. The parameters are: controlpoint(x,y), end(x,y). The possible values for this attribute are defined by the W3C XML Schema string* datatype.

v (Path Definition)

Specifies a string containing the commands that define the shape's path. This value consists of commands followed by zero or more parameters. Default is no value.

The following rules apply to path strings:

Commas or spaces delimit parameters for each command. Both "m 0,0" and "m0 0" are acceptable.
A parameter that is omitted using commas is treated as having a value of zero. Thus, "c 10,10,0,0,25,13" and "c 10,10,,,25,13" are equivalent.
Parameterized paths are also allowed. In this case, the shape shall also have a formulas element (§14.1.2.6) with a list of formulas that are substituted into the path using the @ symbol followed by the number of the formula. The adj property of the shape contains the input parameters for these formulas. For example, "moveto @1@4". The evaluations of the formulas are substituted into the appropriate positions. @ also serves as a delimiter.

The allowed commands are given below. An asterisk (*) indicates that the command is allowed to be repeated. For the qb command, the controlpoint parameter is also allowed to be repeated.

Command

Name

Parameters

Description

moveto

Start a new sub-path at the given (x,y) coordinate.

lineto

Draw a line from the current point to the given (x,y) coordinate which becomes the new current point. Specifying a number of coordinate pairs forms a polyline.

curveto

Draw a cubic bézier curve from the current point to the coordinate given by the final two parameters. The control points are given by the first four parameters.

Close the current sub-path by drawing a straight line from the current point to the original moveto point.

end

End the current set of sub-paths. A given set of sub-paths (as delimited by end) is filled. Subsequent sets of sub-paths are filled independently and superimposed on existing ones.

rmoveto

Start a new sub-path at a coordinate relative to the current point, cp (cpx+x, cpy+y).

rlineto

Draw a line from the current point to the given relative coordinate (cpx+x, cpy+y).

rcurveto

Cubic bézier curve using the given coordinate relative to the current point.

nofill

The current set of sub-paths (delimited by e) is not filled.

nostroke

The current set of sub-paths (delimited by e) is not stroked.

angleellipseto

Draws a segment of an ellipse as described using these parameters. A straight line is drawn from the current point to the start point of the segment. The parameters are: center (x,y), size(w,h), start angle, end angle.

angleellipse

Same as angleellipseto except that there is an implied moveto the starting point of the segment.

arcto

A segment of the ellipse is drawn which starts at the angle defined by the start radius vector and ends at the angle defined by the end vector. A straight line is drawn from the current point to the start of the arc. The arc is always drawn in a counterclockwise direction. The parameters are: left, top, right, bottom, start(x,y), end(x,y). The first four values define the bounding box of an ellipse. The last four define two radial vectors.

arc

Same as arcto except there is an implied moveto the start point of the arc.

clockwisearcto

Same as arcto but the arc is drawn in a clockwise direction.

clockwisearc

Same as arc but the arc is drawn in a clockwise direction

ellipticalqaudrantx

A quarter ellipse is drawn from the current point to the given end point. The elliptical segment is initially tangential to a line parallel to the x-axis. (i.e. the segment starts out horizontal). The parameters are: end(x,y).

ellipticalquadranty

Same as ellipticalquadrantx except that the elliptical segment is initially tangential to a line parallel to the y-axis (i.e. the segment starts out vertical).

quadraticbezier

2+2*

Defines one or more quadratic bézier curves by means of control points and an end point. Intermediate (on-curve) points are obtained by interpolation between successive control points as in the OpenType font specification. The sub-path need not be started in which case the sub-path is closed. In this case the last point of the sub-path defines the start point of the quadratic bézier. The parameters are: controlpoint(x,y)*, end(x,y).

The possible values for this attribute are defined by the W3C XML Schema string datatype.

[Note: The W3C XML Schema definition of this element’s content model (CT_ClipPath) is located in §A.6.2. end note]

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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ClipPath Class

Inheritance Hierarchy

Syntax

Remarks

Thread Safety

See Also

Reference

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