|
|||||||||
| Home >> All >> org >> eclipse >> swt >> [ graphics overview ] | PREV CLASS NEXT CLASS | ||||||||
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD |
DETAIL: FIELD | CONSTR | METHOD | ||||||||
org.eclipse.swt.graphics
Class Rectangle
java.lang.Objectorg.eclipse.swt.graphics.Rectangle
- All Implemented Interfaces:
- java.io.Serializable, org.eclipse.swt.internal.SerializableCompatibility
- public final class Rectangle
- extends java.lang.Object
- implements org.eclipse.swt.internal.SerializableCompatibility
- extends java.lang.Object
Instances of this class represent rectangular areas in an (x, y) coordinate system. The top left corner of the rectangle is specified by its x and y values, and the extent of the rectangle is specified by its width and height.
The coordinate space for rectangles and points is considered to have increasing values downward and to the right from its origin making this the normal, computer graphics oriented notion of (x, y) coordinates rather than the strict mathematical one.
The hashCode() method in this class uses the values of the public fields to compute the hash value. When storing instances of the class in hashed collections, do not modify these fields after the object has been inserted.
Application code does not need to explicitly release the
resources managed by each instance when those instances are no longer
required, and thus no dispose() method is provided.
| Field Summary | |
int |
height
the height of the rectangle |
int |
width
the width of the rectangle |
int |
x
the x coordinate of the rectangle |
int |
y
the y coordinate of the rectangle |
| Constructor Summary | |
Rectangle(int x,
int y,
int width,
int height)
Construct a new instance of this class given the x, y, width and height values. |
|
| Method Summary | |
void |
add(Rectangle rect)
Destructively replaces the x, y, width and height values in the receiver with ones which represent the union of the rectangles specified by the receiver and the given rectangle. |
boolean |
contains(int x,
int y)
Returns true if the point specified by the
arguments is inside the area specified by the receiver,
and false otherwise. |
boolean |
contains(Point pt)
Returns true if the given point is inside the
area specified by the receiver, and false
otherwise. |
boolean |
equals(java.lang.Object object)
Compares the argument to the receiver, and returns true if they represent the same object using a class specific comparison. |
int |
hashCode()
Returns an integer hash code for the receiver. |
void |
intersect(Rectangle rect)
Destructively replaces the x, y, width and height values in the receiver with ones which represent the intersection of the rectangles specified by the receiver and the given rectangle. |
Rectangle |
intersection(Rectangle rect)
Returns a new rectangle which represents the intersection of the receiver and the given rectangle. |
boolean |
intersects(int x,
int y,
int width,
int height)
Returns true if the rectangle described by the
arguments intersects with the receiver and false
otherwise. |
boolean |
intersects(Rectangle rect)
Returns true if the given rectangle intersects
with the receiver and false otherwise. |
boolean |
isEmpty()
Returns true if the receiver does not cover any
area in the (x, y) coordinate plane, and false if
the receiver does cover some area in the plane. |
java.lang.String |
toString()
Returns a string containing a concise, human-readable description of the receiver. |
Rectangle |
union(Rectangle rect)
Returns a new rectangle which represents the union of the receiver and the given rectangle. |
| Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
| Field Detail |
x
public int x
- the x coordinate of the rectangle
y
public int y
- the y coordinate of the rectangle
width
public int width
- the width of the rectangle
height
public int height
- the height of the rectangle
| Constructor Detail |
Rectangle
public Rectangle(int x,
int y,
int width,
int height)
- Construct a new instance of this class given the
x, y, width and height values.
| Method Detail |
add
public void add(Rectangle rect)
- Destructively replaces the x, y, width and height values
in the receiver with ones which represent the union of the
rectangles specified by the receiver and the given rectangle.
The union of two rectangles is the smallest single rectangle that completely covers both of the areas covered by the two given rectangles.
contains
public boolean contains(int x,
int y)
- Returns
trueif the point specified by the arguments is inside the area specified by the receiver, andfalseotherwise.
contains
public boolean contains(Point pt)
- Returns
trueif the given point is inside the area specified by the receiver, andfalseotherwise.
equals
public boolean equals(java.lang.Object object)
- Compares the argument to the receiver, and returns true
if they represent the same object using a class
specific comparison.
hashCode
public int hashCode()
- Returns an integer hash code for the receiver. Any two
objects which return
truewhen passed toequalsmust return the same value for this method.
intersect
public void intersect(Rectangle rect)
- Destructively replaces the x, y, width and height values
in the receiver with ones which represent the intersection of the
rectangles specified by the receiver and the given rectangle.
intersection
public Rectangle intersection(Rectangle rect)
- Returns a new rectangle which represents the intersection
of the receiver and the given rectangle.
The intersection of two rectangles is the rectangle that covers the area which is contained within both rectangles.
intersects
public boolean intersects(int x,
int y,
int width,
int height)
- Returns
trueif the rectangle described by the arguments intersects with the receiver andfalseotherwise.Two rectangles intersect if the area of the rectangle representing their intersection is not empty.
- Since:
- 3.0
intersects
public boolean intersects(Rectangle rect)
- Returns
trueif the given rectangle intersects with the receiver andfalseotherwise.Two rectangles intersect if the area of the rectangle representing their intersection is not empty.
isEmpty
public boolean isEmpty()
- Returns
trueif the receiver does not cover any area in the (x, y) coordinate plane, andfalseif the receiver does cover some area in the plane.A rectangle is considered to cover area in the (x, y) coordinate plane if both its width and height are non-zero.
toString
public java.lang.String toString()
- Returns a string containing a concise, human-readable
description of the receiver.
union
public Rectangle union(Rectangle rect)
- Returns a new rectangle which represents the union of
the receiver and the given rectangle.
The union of two rectangles is the smallest single rectangle that completely covers both of the areas covered by the two given rectangles.
|
|||||||||
| Home >> All >> org >> eclipse >> swt >> [ graphics overview ] | PREV CLASS NEXT CLASS | ||||||||
|
SUMMARY: JAVADOC | SOURCE | DOWNLOAD | NESTED | FIELD | CONSTR | METHOD |
DETAIL: FIELD | CONSTR | METHOD | ||||||||