: Class GXPaths
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quicktime.std.image
Class GXPaths
java.lang.Object
|
+--quicktime.util.QTByteObject
|
+--quicktime.std.image.GXPaths
All Implemented Interfaces: InterfaceLib, PrimitivesLib, QuickTimeLib, java.io.Serializable, SharedLibrary, com.apple.jdirect.SharedLibrary
public final class GXPathsextends QTByteObjectimplements QuickTimeLib
The GXPaths class allows you to group multiple path contours together.
You use this class when specifying the geometry of a path shape.
See Also: Serialized Form
Fields inherited from interface quicktime.jdirect.QuickTimeLib
JDirect_MacOSX, libraryInstance, name
Constructor Summary
GXPaths(Curve curveComponent,
GXPath[] ar)
Creates a GXPaths object which corresponds to gxPaths object of QuickDrawGX
It sets the total number of contours in the path equal to the total number of paths
ie every path has one contour.
Method Summary
int
countPointsInPath(int contourIndex)
This method is used to count the points along either one of a path's contours
or all of its contours.
int
getContours()
Returns the no.
long
getLength(int index)
This method is used to calculate the length of one of a path's contours or the
sum of the lengths of all of its contours.
NearestPointInfo
getNearestPathPoint(QDPoint thePoint)
This method is used to to find the closest point on a path to a specified point.
PathPointInfo
getPathPoint(int contourIndex,
int pointIndex)
This method is used to get a point from a path and to find out if the point is on the curve.
float
getPathPointToLength(int startDist,
int endDist,
QDPoint thePoint)
This method is used to to get the length of a path between specified starting
and ending distances that is nearest a point.
QDPoint[]
lengthToPoint(int index,
int length)
This method is used to get the point at a specified distance along a curve.
void
setPathPoint(int contourIndex,
int pointIndex,
QDPoint thePoint,
boolean ptIsOnPath)
This method is best for adding a single point to a path rather than large numbers of points to a path.
Methods inherited from class quicktime.util.QTByteObject
equals, fromArray, getBytes, getSize, toString
Methods inherited from class java.lang.Object
getClass, hashCode, notify, notifyAll, wait, wait, wait
Constructor Detail
GXPaths
public GXPaths(Curve curveComponent,
GXPath[] ar)
Creates a GXPaths object which corresponds to gxPaths object of QuickDrawGX
It sets the total number of contours in the path equal to the total number of paths
ie every path has one contour.
Parameters:curveComponent - the curve Componentar - array of GXPath objects containing the geometries for the paths
Method Detail
getContours
public int getContours()
Returns the no. of contours in the Paths object
Returns:the total number of coutours
countPointsInPath
public int countPointsInPath(int contourIndex)
throws StdQTException
This method is used to count the points along either one of a path's contours
or all of its contours.
QuickTime::CurveCountPointsInPath
Parameters:contourIndex - the index of the contour to be counted.Returns:the number of points in the contour or path.
setPathPoint
public void setPathPoint(int contourIndex,
int pointIndex,
QDPoint thePoint,
boolean ptIsOnPath)
throws StdQTException
This method is best for adding a single point to a path rather than large numbers of points to a path.
QuickTime::CurveSetPathPoint
Parameters:contourIndex - Specifies the index of the path contour to which to add the point.pointIndex - Specifies the index of the point to add.ptIsOnPath - If TRUE , specifies that the new point is to be on the path.
getPathPoint
public PathPointInfo getPathPoint(int contourIndex,
int pointIndex)
throws StdQTException
This method is used to get a point from a path and to find out if the point is on the curve.
QuickTime::CurveGetPathPoint
Parameters:contourIndex - Specifies the index of the contour from which to get the point.pointIndex - Specifies the index of the point to get.Returns:thePoint field that is to receive the point.
lengthToPoint
public QDPoint[] lengthToPoint(int index,
int length)
throws StdQTException
This method is used to get the point at a specified distance along a curve.
QuickTime::CurveLengthToPoint
Parameters:index - Specifies the index of the path contour from which to get the point.length - Specifies the distance along the curve at which to find the point.Returns:QDPoint[] array of two points containing the location (first element) and the tangent point (second element)
getLength
public long getLength(int index)
throws StdQTException
This method is used to calculate the length of one of a path's contours or the
sum of the lengths of all of its contours.
QuickTime::CurveGetLength
Parameters:index - Contains the index of the contour whose length is to be calculated or, if the value is 0 ,
specifies to calculate the lengths of all of the path's contours and return the sum of the lengths.Returns:wideLength Contains the length.
getPathPointToLength
public float getPathPointToLength(int startDist,
int endDist,
QDPoint thePoint)
throws StdQTException
This method is used to to get the length of a path between specified starting
and ending distances that is nearest a point.
QuickTime::CurvePathPointToLength
Parameters:startDist - Specifies the distance along the path at which to start measuring the path's length.endDist - Specifies the distance along the path at which to stop measuring the path's length.thePoint - Contains a pointer to a point; the function measures the path closest to this point.Returns:the length of the specified part of the path.
getNearestPathPoint
public NearestPointInfo getNearestPathPoint(QDPoint thePoint)
throws StdQTException
This method is used to to find the closest point on a path to a specified point.
In programs where users directly manipulate curves, you can use this function
to determine the closest control point to a given point.
QuickTime::CurveGetNearestPathPoint
Parameters:thePoint - Contains a point for which to find the closest point on the path.Returns:information about the specified point
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