Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class AbstractDocument.BranchElement - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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javax.swing.text
Class AbstractDocument.BranchElement

java.lang.Object
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  +--javax.swing.text.AbstractDocument.AbstractElement
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        +--javax.swing.text.AbstractDocument.BranchElement

Direct Known Subclasses:: DefaultStyledDocument.SectionElement, HTMLDocument.BlockElement

Enclosing class:: AbstractDocument

public class AbstractDocument.BranchElement
extends AbstractDocument.AbstractElement

Implements a composite element that contains other elements.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. A future release of Swing will provide support for long term persistence.

See Also:: Serialized Form

Constructor Summary

AbstractDocument.BranchElement(Element parent, AttributeSet a)
          Constructs a composite element that initially contains no children.

Method Summary

Enumeration children()
          Returns the children of the reciever as an Enumeration.

boolean getAllowsChildren()
          Returns true if the receiver allows children.

Element getElement(int index)
          Gets a child element.

int getElementCount()
          Gets the number of children for the element.

int getElementIndex(int offset)
          Gets the child element index closest to the given model offset.

int getEndOffset()
          Gets the ending offset in the model for the element.

String getName()
          Gets the element name.

int getStartOffset()
          Gets the starting offset in the model for the element.

boolean isLeaf()
          Checks whether the element is a leaf.

Element positionToElement(int pos)
          Gets the child element that contains the given model position.

void replace(int offset, int length, Element[] elems)
          Replaces content with a new set of elements.

String toString()
          Converts the element to a string.

Methods inherited from class javax.swing.text.AbstractDocument.AbstractElement

addAttribute, addAttributes, containsAttribute, containsAttributes, copyAttributes, dump, finalize, getAttribute, getAttributeCount, getAttributeNames, getAttributes, getChildAt, getChildCount, getDocument, getIndex, getParent, getParentElement, getResolveParent, isDefined, isEqual, removeAttribute, removeAttributes, removeAttributes, setResolveParent

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

AbstractDocument.BranchElement

public AbstractDocument.BranchElement(Element parent,
                                      AttributeSet a)

Constructs a composite element that initially contains no children.

Parameters:: parent - The parent element; a - the attributes for the element

Method Detail

positionToElement

public Element positionToElement(int pos)

Gets the child element that contains the given model position.

Parameters:: pos - the position >= 0
Returns:: the element, null if none

replace

public void replace(int offset,
                    int length,
                    Element[] elems)

Replaces content with a new set of elements.

Parameters:: offset - the starting offset >= 0; length - the length to replace >= 0; elems - the new elements

toString

public String toString()

Converts the element to a string.

Overrides:: toString in class Object

Returns:: the string

getName

public String getName()

Gets the element name.

Overrides:: getName in class AbstractDocument.AbstractElement

Returns:: the element name

getStartOffset

public int getStartOffset()

Gets the starting offset in the model for the element.

Overrides:: getStartOffset in class AbstractDocument.AbstractElement

Returns:: the offset >= 0

getEndOffset

public int getEndOffset()

Gets the ending offset in the model for the element.

Overrides:: getEndOffset in class AbstractDocument.AbstractElement

Returns:: the offset >= 0

getElement

public Element getElement(int index)

Gets a child element.

Overrides:: getElement in class AbstractDocument.AbstractElement

Parameters:: index - the child index, >= 0 && < getElementCount()
Returns:: the child element, null if none

getElementCount

public int getElementCount()

Gets the number of children for the element.

Overrides:: getElementCount in class AbstractDocument.AbstractElement

Returns:: the number of children >= 0

getElementIndex

public int getElementIndex(int offset)

Gets the child element index closest to the given model offset.

Overrides:: getElementIndex in class AbstractDocument.AbstractElement

Parameters:: offset - the offset >= 0
Returns:: the element index >= 0

isLeaf

public boolean isLeaf()

Checks whether the element is a leaf.

Overrides:: isLeaf in class AbstractDocument.AbstractElement

Returns:: true if a leaf

getAllowsChildren

public boolean getAllowsChildren()

Returns true if the receiver allows children.

Overrides:: getAllowsChildren in class AbstractDocument.AbstractElement

children

public Enumeration children()

Returns the children of the reciever as an Enumeration.

Overrides:: children in class AbstractDocument.AbstractElement