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com.trolltech.qt.gui
Enum QGraphicsScene.ItemIndexMethod

java.lang.Object
  extended by java.lang.Enum<QGraphicsScene.ItemIndexMethod>
      extended by com.trolltech.qt.gui.QGraphicsScene.ItemIndexMethod
All Implemented Interfaces:
QtEnumerator, java.io.Serializable, java.lang.Comparable<QGraphicsScene.ItemIndexMethod>
Enclosing class:
QGraphicsScene

public static enum QGraphicsScene.ItemIndexMethod
extends java.lang.Enum<QGraphicsScene.ItemIndexMethod>
implements QtEnumerator

This enum describes the indexing algorithms QGraphicsScene provides for managing positional information about items on the scene.

See Also:
setItemIndexMethod, bspTreeDepth

Enum Constant Summary
BspTreeIndex
          A Binary Space Partitioning tree is applied.
NoIndex
          No index is applied.
 
Method Summary
static QGraphicsScene.ItemIndexMethod resolve(int value)
           
 int value()
          This function should return an integer value for the enum values of the enumeration that implements this interface.
static QGraphicsScene.ItemIndexMethod valueOf(java.lang.String name)
          Returns the enum constant of this type with the specified name.
static QGraphicsScene.ItemIndexMethod[] values()
          Returns an array containing the constants of this enum type, in the order they are declared.
 
Methods inherited from class java.lang.Enum
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf
 
Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait
 

Enum Constant Detail

BspTreeIndex

public static final QGraphicsScene.ItemIndexMethod BspTreeIndex

A Binary Space Partitioning tree is applied. All QGraphicsScene's item location algorithms are of an order close to logarithmic complexity, by making use of binary search. Adding, moving and removing items is logarithmic. This approach is best for static scenes (i.e., scenes where most items do not move).


NoIndex

public static final QGraphicsScene.ItemIndexMethod NoIndex

No index is applied. Item location is of linear complexity, as all items on the scene are searched. Adding, moving and removing items, however, is done in constant time. This approach is ideal for dynamic scenes, where many items are added, moved or removed continuously.

Method Detail

values

public static QGraphicsScene.ItemIndexMethod[] values()
Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
for (QGraphicsScene.ItemIndexMethod c : QGraphicsScene.ItemIndexMethod.values())
    System.out.println(c);

Returns:
an array containing the constants of this enum type, in the order they are declared

valueOf

public static QGraphicsScene.ItemIndexMethod valueOf(java.lang.String name)
Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:
name - the name of the enum constant to be returned.
Returns:
the enum constant with the specified name
Throws:
java.lang.IllegalArgumentException - if this enum type has no constant with the specified name
java.lang.NullPointerException - if the argument is null

value

public int value()
Description copied from interface: QtEnumerator
This function should return an integer value for the enum values of the enumeration that implements this interface.

Specified by:
value in interface QtEnumerator

resolve

public static QGraphicsScene.ItemIndexMethod resolve(int value)

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