android.graphics
public class
public class
android.graphics.PathMeasure
| java.lang.Object | ||
| android.graphics.PathMeasure | ||
Summary
Constants
| Value | ||||
|---|---|---|---|---|
| int | POSITION_MATRIX_FLAG | 1 | 0x00000001 | |
| int | TANGENT_MATRIX_FLAG | 2 | 0x00000002 |
Public Constructors
| PathMeasure() | |||||
| PathMeasure(Path path, boolean forceClosed) |
Public Methods
| float | getLength() | ||||
| Return the total length of the current contour, or 0 if no path is associated. | |||||
| boolean | getMatrix(float distance, Matrix matrix, int flags) | ||||
| Pins distance to 0 <= distance <= getLength(), and then computes the corresponding matrix. | |||||
| boolean | getPosTan(float distance, float[] pos, float[] tan) | ||||
| Pins distance to 0 <= distance <= getLength(), and then computes the corresponding position and tangent. | |||||
| boolean | getSegment(float startD, float stopD, Path dst, boolean startWithMoveTo) | ||||
| Given a start and stop distance, return in dst the intervening segment(s). | |||||
| boolean | isClosed() | ||||
| Return true if the current contour is closed() | |||||
| boolean | nextContour() | ||||
| Move to the next contour in the path. | |||||
| void | setPath(Path path, boolean forceClosed) | ||||
| Assign a new path, or null to have none. | |||||
Protected Methods
| void | finalize() | ||||
| Called by the virtual machine when there are no longer any (non-weak) references to the receiver. | |||||
Methods inherited
from class
java.lang.Object
Details
Constants
public static final int POSITION_MATRIX_FLAG
Constant Value:
1
(0x00000001)
public static final int TANGENT_MATRIX_FLAG
Constant Value:
2
(0x00000002)
Public Constructors
public PathMeasure()
public PathMeasure(Path path, boolean forceClosed)
Public Methods
public float getLength()
Return the total length of the current contour, or 0 if no path
is associated.
public boolean getMatrix(float distance, Matrix matrix, int flags)
Pins distance to 0 <= distance <= getLength(), and then computes
the corresponding matrix.
Returns false if there is no path, or a zero-length path was specified, in which case
matrix is unchanged.
public boolean getPosTan(float distance, float[] pos, float[] tan)
Pins distance to 0 <= distance <= getLength(), and then computes
the corresponding position and tangent.
Returns false if there is no path, or a zero-length path was specified, in which case
position and tangent are unchanged.
Parameters
| distance | The distance along the current contour to sample |
|---|---|
| pos | If not null, eturns the sampled position (x==[0], y==[1]) |
| tan | If not null, returns the sampled tangent (x==[0], y==[1]) |
Returns
- true if there is no path to sample
public boolean getSegment(float startD, float stopD, Path dst, boolean startWithMoveTo)
Given a start and stop distance, return in dst the intervening segment(s).
If the segment is zero-length, return false, else return true.
startD and stopD are pinned to legal values (0..getLength()). If startD <= stopD
then return false (and leave dst untouched).
Begin the segment with a moveTo if startWithMoveTo is true
public boolean isClosed()
Return true if the current contour is closed()
public boolean nextContour()
Move to the next contour in the path. Return true if one exists, or false if
we're done with the path.
public void setPath(Path path, boolean forceClosed)
Assign a new path, or null to have none.
Protected Methods
protected void finalize()
Called by the virtual machine when there are no longer any (non-weak)
references to the receiver. Subclasses can use this facility to guarantee
that any associated resources are cleaned up before the receiver is
garbage collected. Uncaught exceptions which are thrown during the
running of the method cause it to terminate immediately, but are
otherwise ignored.
Note: The virtual machine assumes that the implementation in class Object is empty.
Throws
| Throwable |
|---|