ExtendedGeneralPath (mxGraph 2.1.1.1 API Specification)

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mxGraph 2.1.1.1

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com.mxgraph.util.svg
Class ExtendedGeneralPath

java.lang.Object
  com.mxgraph.util.svg.ExtendedGeneralPath

All Implemented Interfaces:: Shape, Cloneable

public class ExtendedGeneralPath
extends Object
implements Shape, Cloneable
extends Object
implements Shape, Cloneable

The ExtendedGeneralPath class represents a geometric path constructed from straight lines, quadratic and cubic (Bezier) curves and elliptical arc. This class delegates lines and curves to an enclosed GeneralPath. Elliptical arc is implemented using an Arc2D in float precision.

Warning : An elliptical arc may be composed of several path segments. For futher details, see the SVG Appendix F.6

Field Summary
`protected GeneralPath`	`path` The enclosed general path.

Constructor Summary
`ExtendedGeneralPath()` Constructs a new `ExtendedGeneralPath`.
`ExtendedGeneralPath(int rule)` Constructs a new `ExtendedGeneralPath` with the specified winding rule to control operations that require the interior of the path to be defined.
`ExtendedGeneralPath(int rule, int initialCapacity)` Constructs a new `ExtendedGeneralPath` object with the specified winding rule and the specified initial capacity to store path coordinates.
`ExtendedGeneralPath(Shape s)` Constructs a new `ExtendedGeneralPath` object from an arbitrary `Shape` object.

Method Summary
`void`	`append(ExtendedPathIterator epi, boolean connect)` Delegates to the enclosed `GeneralPath`.
`void`	`append(PathIterator pi, boolean connect)` Delegates to the enclosed `GeneralPath`.
`void`	`append(Shape s, boolean connect)` Delegates to the enclosed `GeneralPath`.
`void`	`arcTo(float rx, float ry, float angle, boolean largeArcFlag, boolean sweepFlag, float x, float y)` Adds an elliptical arc, defined by two radii, an angle from the x-axis, a flag to choose the large arc or not, a flag to indicate if we increase or decrease the angles and the final point of the arc.
`protected void`	`checkMoveTo()` Checks if previous command was a moveto command, skipping a close command (if present).
`Object`	`clone()` Delegates to the enclosed `GeneralPath`.
`void`	`closePath()` Delegates to the enclosed `GeneralPath`.
`static Arc2D`	`computeArc(double x0, double y0, double rx, double ry, double angle, boolean largeArcFlag, boolean sweepFlag, double x, double y)` This constructs an unrotated Arc2D from the SVG specification of an Elliptical arc.
`boolean`	`contains(double x, double y)` Delegates to the enclosed `GeneralPath`.
`boolean`	`contains(double x, double y, double w, double h)` Delegates to the enclosed `GeneralPath`.
`boolean`	`contains(Point2D p)` Delegates to the enclosed `GeneralPath`.
`boolean`	`contains(Rectangle2D r)` Delegates to the enclosed `GeneralPath`.
`Shape`	`createTransformedShape(AffineTransform at)` Delegates to the enclosed `GeneralPath`.
`void`	`curveTo(float x1, float y1, float x2, float y2, float x3, float y3)` Delegates to the enclosed `GeneralPath`.
`Rectangle`	`getBounds()` Delegates to the enclosed `GeneralPath`.
`Rectangle2D`	`getBounds2D()` Delegates to the enclosed `GeneralPath`.
`Point2D`	`getCurrentPoint()` get the current position or `null`.
`ExtendedPathIterator`	`getExtendedPathIterator()` Delegates to the enclosed `GeneralPath`.
`PathIterator`	`getPathIterator(AffineTransform at)` Delegates to the enclosed `GeneralPath`.
`PathIterator`	`getPathIterator(AffineTransform at, double flatness)` Delegates to the enclosed `GeneralPath`.
`int`	`getWindingRule()` Delegates to the enclosed `GeneralPath`.
`boolean`	`intersects(double x, double y, double w, double h)` Delegates to the enclosed `GeneralPath`.
`boolean`	`intersects(Rectangle2D r)` Delegates to the enclosed `GeneralPath`.
`void`	`lineTo(float x, float y)` Delegates to the enclosed `GeneralPath`.
`void`	`moveTo(float x, float y)` Delegates to the enclosed `GeneralPath`.
`void`	`quadTo(float x1, float y1, float x2, float y2)` Delegates to the enclosed `GeneralPath`.
`void`	`reset()` Delegates to the enclosed `GeneralPath`.
`void`	`setWindingRule(int rule)` Delegates to the enclosed `GeneralPath`.
`void`	`transform(AffineTransform at)` Delegates to the enclosed `GeneralPath`.

Methods inherited from class java.lang.Object
`equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

path

protected GeneralPath path

The enclosed general path.

Constructor Detail

ExtendedGeneralPath

public ExtendedGeneralPath()

Constructs a new ExtendedGeneralPath.

ExtendedGeneralPath

public ExtendedGeneralPath(int rule)

Constructs a new ExtendedGeneralPath with the specified winding rule to control operations that require the interior of the path to be defined.

ExtendedGeneralPath

public ExtendedGeneralPath(int rule,
                           int initialCapacity)

Constructs a new ExtendedGeneralPath object with the specified winding rule and the specified initial capacity to store path coordinates.

ExtendedGeneralPath

public ExtendedGeneralPath(Shape s)

Constructs a new ExtendedGeneralPath object from an arbitrary Shape object.

Method Detail

arcTo

public void arcTo(float rx,
                  float ry,
                  float angle,
                  boolean largeArcFlag,
                  boolean sweepFlag,
                  float x,
                  float y)

Adds an elliptical arc, defined by two radii, an angle from the x-axis, a flag to choose the large arc or not, a flag to indicate if we increase or decrease the angles and the final point of the arc.

Parameters:: rx - the x radius of the ellipse; ry - the y radius of the ellipse; angle - the angle from the x-axis of the current coordinate system to the x-axis of the ellipse in degrees.; largeArcFlag - the large arc flag. If true the arc spanning less than or equal to 180 degrees is chosen, otherwise the arc spanning greater than 180 degrees is chosen; sweepFlag - the sweep flag. If true the line joining center to arc sweeps through decreasing angles otherwise it sweeps through increasing angles; x - the absolute x coordinate of the final point of the arc.; y - the absolute y coordinate of the final point of the arc.

computeArc

public static Arc2D computeArc(double x0,
                               double y0,
                               double rx,
                               double ry,
                               double angle,
                               boolean largeArcFlag,
                               boolean sweepFlag,
                               double x,
                               double y)

This constructs an unrotated Arc2D from the SVG specification of an Elliptical arc. To get the final arc you need to apply a rotation transform such as: AffineTransform.getRotateInstance (angle, arc.getX()+arc.getWidth()/2, arc.getY()+arc.getHeight()/2);