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Eclipse Draw2d 3.2 |
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java.lang.Objectorg.eclipse.draw2d.geometry.PointList
Represents a List of Points. This class is used for building an int[].
The array is internal, and is constructed and queried by the client using
Points. SWT uses integer arrays when painting polylines and polygons.
| Constructor Summary | |
PointList()
Constructs an empty PointList. |
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PointList(int size)
Constructs a PointList with initial capacity size, but no points. |
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PointList(int[] points)
Constructs a PointList with the given points. |
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| Method Summary | |
void |
addAll(PointList source)
Appends all of the given points to this PointList. |
void |
addPoint(int x,
int y)
Adds the input point values to this PointList. |
void |
addPoint(Point p)
Adds Point p to this PointList. |
Rectangle |
getBounds()
Returns the smallest Rectangle which contains all Points. |
PointList |
getCopy()
Creates a copy |
Point |
getFirstPoint()
Returns the first Point in the list. |
Point |
getLastPoint()
Returns the last point in the list. |
Point |
getMidpoint()
Returns the midpoint of the list of Points. |
Point |
getPoint(int index)
Returns the Point in the list at the specified index. |
Point |
getPoint(Point p,
int index)
Copies the x and y values at given index into a specified Point. |
void |
insertPoint(Point p,
int index)
Inserts a given point at a specified index. |
boolean |
intersects(Rectangle r)
Determines whether any of the line segments represented by this PointList intersect the given Rectangle. |
void |
performScale(double factor)
Scales this object by the scale factor. |
void |
performTranslate(int dx,
int dy)
Translates this object horizontally by dx and vertically by
dy. |
void |
removeAllPoints()
Removes all the points stored by this list. |
Point |
removePoint(int index)
Removes the point at the specified index from the PointList, and returns it. |
void |
reverse()
Reverses the order of the points in the list. |
void |
setPoint(Point pt,
int index)
Overwrites a point at a given index in the list with the specified Point. |
void |
setSize(int newSize)
Sets the size of this PointList. |
int |
size()
Returns the number of points in this PointList. |
int[] |
toIntArray()
Returns the contents of this PointList as an integer array. |
void |
translate(int x,
int y)
Moves the origin (0,0) of the coordinate system of all the points to the Point (x,y). |
void |
translate(Point pt)
Moves the origin (0,0) of the coordinate system of all the points to the Point pt. |
void |
transpose()
Transposes all x and y values. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
public PointList()
public PointList(int[] points)
points - int array where two consecutive ints form the coordinates of a pointpublic PointList(int size)
size - Number of points to hold.| Method Detail |
public void addAll(PointList source)
source - the source pointlistpublic void addPoint(Point p)
p - the point to be addedremovePoint(int)
public void addPoint(int x,
int y)
x - X value of a point to addy - Y value of a point to addpublic Rectangle getBounds()
public PointList getCopy()
public Point getFirstPoint()
IndexOutOfBoundsException - if the list is emptypublic Point getLastPoint()
IndexOutOfBoundsException - if the list is emptypublic Point getMidpoint()
IndexOutOfBoundsException - if the list is emptypublic Point getPoint(int index)
index - Index of the desired Point
IndexOutOfBoundsException - If the specified index is out of range
public Point getPoint(Point p,
int index)
Point.
p - The Point which will be set with the <x, y> valuesindex - The index being requested
p is returned for conveniencegetPoint(int)
public void insertPoint(Point p,
int index)
p - Point to be inserted.index - Position where the point is to be inserted.
IndexOutOfBoundsException - if the index is invalidsetPoint(Point, int)public boolean intersects(Rectangle r)
r - the rectangle
true if the given rectangle intersects any of the line segments
represented by this PointListpublic void performScale(double factor)
Translatable
performScale in interface Translatablefactor - The scale factorTranslatable.performScale(double)
public void performTranslate(int dx,
int dy)
Translatabledx and vertically by
dy.
performTranslate in interface Translatabledx - The amount to translate horizontallydy - The amount to translate verticallyTranslatable.performTranslate(int, int)public void removeAllPoints()
public Point removePoint(int index)
index - Index of the point to be removed.
IndexOutOfBoundsException - if the removal index is beyond the list capacityaddPoint(Point)public void reverse()
public void setPoint(Point pt,
int index)
pt - Point which is to be stored at the index.index - Index where the given point is to be stored.public void setSize(int newSize)
newSize - the new sizepublic int size()
public int[] toIntArray()
public final void translate(Point pt)
pt - Position by which all the points will be shifted.translate(int,int)
public void translate(int x,
int y)
x - Amount by which all the points will be shifted on the X axis.y - Amount by which all the points will be shifted on the Y axis.translate(Point)public void transpose()
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Eclipse Draw2d 3.2 |
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