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org.eclipse.swt.widgets
Class Monitor  

java.lang.Object
  org.eclipse.swt.widgets.Monitor

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public final class Monitor

extends java.lang.Object

Instances of this class are descriptions of monitors.

Since:

3.0

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Field Summary
(package private)  int	clientHeight
(package private)  int	clientWidth
(package private)  int	clientX
(package private)  int	clientY
(package private)  int	handle
(package private)  int	height
(package private)  int	width
(package private)  int	x
(package private)  int	y

 

Constructor Summary
(package private)	Monitor()           Prevents uninitialized instances from being created outside the package.

 

Method Summary
boolean	equals(java.lang.Object object)           Determine whether this Object is semantically equal to another Object.
org.eclipse.swt.graphics.Rectangle	getBounds()           Returns a rectangle describing the receiver's size and location relative to its device.
org.eclipse.swt.graphics.Rectangle	getClientArea()           Returns a rectangle which describes the area of the receiver which is capable of displaying data.
int	hashCode()           Get a value that represents this Object, as uniquely as possible within the confines of an int.

 

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

handle

int handle

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x

int x

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y

int y

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width

int width

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height

int height

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clientX

int clientX

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clientY

int clientY

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clientWidth

int clientWidth

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clientHeight

int clientHeight

Constructor Detail

Monitor

Monitor()

Prevents uninitialized instances from being created outside the package.

Method Detail

equals

public boolean equals(java.lang.Object object)

Description copied from class: java.lang.Object

Determine whether this Object is semantically equal to another Object.

There are some fairly strict requirements on this method which subclasses must follow:

• It must be transitive. If a.equals(b) and b.equals(c), then a.equals(c) must be true as well.
• It must be symmetric. a.equals(b) and b.equals(a) must have the same value.
• It must be reflexive. a.equals(a) must always be true.
• It must be consistent. Whichever value a.equals(b) returns on the first invocation must be the value returned on all later invocations.
• a.equals(null) must be false.
• It must be consistent with hashCode(). That is, a.equals(b) must imply a.hashCode() == b.hashCode(). The reverse is not true; two objects that are not equal may have the same hashcode, but that has the potential to harm hashing performance.

This is typically overridden to throw a java.lang.ClassCastException if the argument is not comparable to the class performing the comparison, but that is not a requirement. It is legal for a.equals(b) to be true even though a.getClass() != b.getClass(). Also, it is typical to never cause a java.lang.NullPointerException.

In general, the Collections API (java.util) use the equals method rather than the == operator to compare objects. However, java.util.IdentityHashMap is an exception to this rule, for its own good reasons.

The default implementation returns this == o.

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getBounds

public org.eclipse.swt.graphics.Rectangle getBounds()

Returns a rectangle describing the receiver's size and location relative to its device.

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getClientArea

public org.eclipse.swt.graphics.Rectangle getClientArea()

Returns a rectangle which describes the area of the receiver which is capable of displaying data.

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hashCode

public int hashCode()

Description copied from class: java.lang.Object

Get a value that represents this Object, as uniquely as possible within the confines of an int.

There are some requirements on this method which subclasses must follow:

• Semantic equality implies identical hashcodes. In other words, if a.equals(b) is true, then a.hashCode() == b.hashCode() must be as well. However, the reverse is not necessarily true, and two objects may have the same hashcode without being equal.
• It must be consistent. Whichever value o.hashCode() returns on the first invocation must be the value returned on all later invocations as long as the object exists. Notice, however, that the result of hashCode may change between separate executions of a Virtual Machine, because it is not invoked on the same object.

Notice that since hashCode is used in java.util.Hashtable and other hashing classes, a poor implementation will degrade the performance of hashing (so don't blindly implement it as returning a constant!). Also, if calculating the hash is time-consuming, a class may consider caching the results.

The default implementation returns System.identityHashCode(this)

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Home >> All >> org >> eclipse >> swt >> [ widgets overview ]	PREV CLASS  NEXT CLASS
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