Java Module java.desktop Package java.awt Class TextComponent.AccessibleAWTTextComponent（JDK11）

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java.lang.Object
- javax.accessibility.AccessibleContext
- - java.awt.Component.AccessibleAWTComponent
  - - java.awt.TextComponent.AccessibleAWTTextComponent

All Implemented Interfaces:

TextListener, Serializable, EventListener, AccessibleComponent, AccessibleText

Direct Known Subclasses:

TextArea.AccessibleAWTTextArea, TextField.AccessibleAWTTextField

Enclosing class:

TextComponent
```
protected class TextComponent.AccessibleAWTTextComponent
extends Component.AccessibleAWTComponent
implements AccessibleText, TextListener
```
This class implements accessibility support for the TextComponent class. It provides an implementation of the Java Accessibility API appropriate to text component user-interface elements.

Since:

1.3

See Also:

Serialized Form

Nested Class Summary
- Nested classes/interfaces declared in class java.awt.Component.AccessibleAWTComponent
  Component.AccessibleAWTComponent.AccessibleAWTComponentHandler, Component.AccessibleAWTComponent.AccessibleAWTFocusHandler

Field Summary
- Fields declared in class java.awt.Component.AccessibleAWTComponent
  accessibleAWTComponentHandler, accessibleAWTFocusHandler
- Fields declared in class javax.accessibility.AccessibleContext
  ACCESSIBLE_ACTION_PROPERTY, ACCESSIBLE_ACTIVE_DESCENDANT_PROPERTY, ACCESSIBLE_CARET_PROPERTY, ACCESSIBLE_CHILD_PROPERTY, ACCESSIBLE_COMPONENT_BOUNDS_CHANGED, ACCESSIBLE_DESCRIPTION_PROPERTY, ACCESSIBLE_HYPERTEXT_OFFSET, ACCESSIBLE_INVALIDATE_CHILDREN, ACCESSIBLE_NAME_PROPERTY, ACCESSIBLE_SELECTION_PROPERTY, ACCESSIBLE_STATE_PROPERTY, ACCESSIBLE_TABLE_CAPTION_CHANGED, ACCESSIBLE_TABLE_COLUMN_DESCRIPTION_CHANGED, ACCESSIBLE_TABLE_COLUMN_HEADER_CHANGED, ACCESSIBLE_TABLE_MODEL_CHANGED, ACCESSIBLE_TABLE_ROW_DESCRIPTION_CHANGED, ACCESSIBLE_TABLE_ROW_HEADER_CHANGED, ACCESSIBLE_TABLE_SUMMARY_CHANGED, ACCESSIBLE_TEXT_ATTRIBUTES_CHANGED, ACCESSIBLE_TEXT_PROPERTY, ACCESSIBLE_VALUE_PROPERTY, ACCESSIBLE_VISIBLE_DATA_PROPERTY, accessibleDescription, accessibleName, accessibleParent
- Fields declared in interface javax.accessibility.AccessibleText
  CHARACTER, SENTENCE, WORD

Constructor Summary

Constructors
Constructor	Description
`AccessibleAWTTextComponent()`	Constructs an AccessibleAWTTextComponent.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`AccessibleRole`	`getAccessibleRole()`	Gets the role of this object.
`AccessibleStateSet`	`getAccessibleStateSet()`	Gets the state set of the TextComponent.
`AccessibleText`	`getAccessibleText()`	Get the AccessibleText associated with this object.
`String`	`getAfterIndex(int part, int index)`	Returns the String after a given index.
`String`	`getAtIndex(int part, int index)`	Returns the String at a given index.
`String`	`getBeforeIndex(int part, int index)`	Returns the String before a given index.
`int`	`getCaretPosition()`	Returns the zero-based offset of the caret.
`AttributeSet`	`getCharacterAttribute(int i)`	Returns the AttributeSet for a given character (at a given index).
`Rectangle`	`getCharacterBounds(int i)`	Determines the bounding box of the character at the given index into the string.
`int`	`getCharCount()`	Returns the number of characters (valid indices)
`int`	`getIndexAtPoint(Point p)`	Given a point in local coordinates, return the zero-based index of the character under that Point.
`String`	`getSelectedText()`	Returns the portion of the text that is selected.
`int`	`getSelectionEnd()`	Returns the end offset within the selected text.
`int`	`getSelectionStart()`	Returns the start offset within the selected text.
`void`	`textValueChanged(TextEvent textEvent)`	TextListener notification of a text value change.

Methods declared in class javax.accessibility.AccessibleContext
firePropertyChange, getAccessibleAction, getAccessibleEditableText, getAccessibleIcon, getAccessibleRelationSet, getAccessibleSelection, getAccessibleTable, getAccessibleValue, setAccessibleDescription, setAccessibleName, setAccessibleParent

Methods declared in class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - AccessibleAWTTextComponent
```
public AccessibleAWTTextComponent()
```
    Constructs an AccessibleAWTTextComponent. Adds a listener to track caret change.
- Method Detail
  - textValueChanged
```
public void textValueChanged(TextEvent textEvent)
```
    TextListener notification of a text value change.
    
    Specified by:
    
    textValueChanged in interface TextListener
    
    Parameters:
    
    textEvent - the event to be processed
  - getAccessibleStateSet
```
public AccessibleStateSet getAccessibleStateSet()
```
    Gets the state set of the TextComponent. The AccessibleStateSet of an object is composed of a set of unique AccessibleStates. A change in the AccessibleStateSet of an object will cause a PropertyChangeEvent to be fired for the AccessibleContext.ACCESSIBLE_STATE_PROPERTY property.
    
    Overrides:
    
    getAccessibleStateSet in class Component.AccessibleAWTComponent
    
    Returns:
    
    an instance of AccessibleStateSet containing the current state set of the object
    
    See Also:
    
    AccessibleStateSet, AccessibleState, Component.AccessibleAWTComponent.addPropertyChangeListener(java.beans.PropertyChangeListener)
  - getAccessibleRole
```
public AccessibleRole getAccessibleRole()
```
    Gets the role of this object.
    
    Overrides:
    
    getAccessibleRole in class Component.AccessibleAWTComponent
    
    Returns:
    
    an instance of AccessibleRole describing the role of the object (AccessibleRole.TEXT)
    
    See Also:
    
    AccessibleRole
  - getAccessibleText
```
public AccessibleText getAccessibleText()
```
    Get the AccessibleText associated with this object. In the implementation of the Java Accessibility API for this class, return this object, which is responsible for implementing the AccessibleText interface on behalf of itself.
    
    Overrides:
    
    getAccessibleText in class AccessibleContext
    
    Returns:
    
    this object
    
    See Also:
    
    AccessibleText
  - getIndexAtPoint
```
public int getIndexAtPoint(Point p)
```
    Given a point in local coordinates, return the zero-based index of the character under that Point. If the point is invalid, this method returns -1.
    
    Specified by:
    
    getIndexAtPoint in interface AccessibleText
    
    Parameters:
    
    p - the Point in local coordinates
    
    Returns:
    
    the zero-based index of the character under Point p.
  - getCharacterBounds
```
public Rectangle getCharacterBounds(int i)
```
    Determines the bounding box of the character at the given index into the string. The bounds are returned in local coordinates. If the index is invalid a null rectangle is returned.
    
    Specified by:
    
    getCharacterBounds in interface AccessibleText
    
    Parameters:
    
    i - the index into the String >= 0
    
    Returns:
    
    the screen coordinates of the character's bounding box
  - getCharCount
```
public int getCharCount()
```
    Returns the number of characters (valid indices)
    
    Specified by:
    
    getCharCount in interface AccessibleText
    
    Returns:
    
    the number of characters >= 0
  - getCaretPosition
```
public int getCaretPosition()
```
    Returns the zero-based offset of the caret. Note: The character to the right of the caret will have the same index value as the offset (the caret is between two characters).
    
    Specified by:
    
    getCaretPosition in interface AccessibleText
    
    Returns:
    
    the zero-based offset of the caret.
  - getCharacterAttribute
```
public AttributeSet getCharacterAttribute(int i)
```
    Returns the AttributeSet for a given character (at a given index).
    
    Specified by:
    
    getCharacterAttribute in interface AccessibleText
    
    Parameters:
    
    i - the zero-based index into the text
    
    Returns:
    
    the AttributeSet of the character
  - getSelectionStart
```
public int getSelectionStart()
```
    Returns the start offset within the selected text. If there is no selection, but there is a caret, the start and end offsets will be the same. Return 0 if the text is empty, or the caret position if no selection.
    
    Specified by:
    
    getSelectionStart in interface AccessibleText
    
    Returns:
    
    the index into the text of the start of the selection >= 0
  - getSelectionEnd
```
public int getSelectionEnd()
```
    Returns the end offset within the selected text. If there is no selection, but there is a caret, the start and end offsets will be the same. Return 0 if the text is empty, or the caret position if no selection.
    
    Specified by:
    
    getSelectionEnd in interface AccessibleText
    
    Returns:
    
    the index into the text of the end of the selection >= 0
  - getSelectedText
```
public String getSelectedText()
```
    Returns the portion of the text that is selected.
    
    Specified by:
    
    getSelectedText in interface AccessibleText
    
    Returns:
    
    the text, null if no selection
  - getAtIndex
```
public String getAtIndex(int part,
                         int index)
```
    Returns the String at a given index.
    
    Specified by:
    
    getAtIndex in interface AccessibleText
    
    Parameters:
    
    part - the AccessibleText.CHARACTER, AccessibleText.WORD, or AccessibleText.SENTENCE to retrieve
    
    index - an index within the text >= 0
    
    Returns:
    
    the letter, word, or sentence, null for an invalid index or part
  - getAfterIndex
```
public String getAfterIndex(int part,
                            int index)
```
    Returns the String after a given index.
    
    Specified by:
    
    getAfterIndex in interface AccessibleText
    
    Parameters:
    
    part - the AccessibleText.CHARACTER, AccessibleText.WORD, or AccessibleText.SENTENCE to retrieve
    
    index - an index within the text >= 0
    
    Returns:
    
    the letter, word, or sentence, null for an invalid index or part
  - getBeforeIndex
```
public String getBeforeIndex(int part,
                             int index)
```
    Returns the String before a given index.
    
    Specified by:
    
    getBeforeIndex in interface AccessibleText
    
    Parameters:
    
    part - the AccessibleText.CHARACTER, AccessibleText.WORD, or AccessibleText.SENTENCE to retrieve
    
    index - an index within the text >= 0
    
    Returns:
    
    the letter, word, or sentence, null for an invalid index or part

Java Module java.desktop Package java.awt Class TextComponent.AccessibleAWTTextComponent（JDK11）

Class TextComponent.AccessibleAWTTextComponent

Nested Class Summary

Nested classes/interfaces declared in class java.awt.Component.AccessibleAWTComponent

Field Summary

Fields declared in class java.awt.Component.AccessibleAWTComponent

Fields declared in class javax.accessibility.AccessibleContext

Fields declared in interface javax.accessibility.AccessibleText

Constructor Summary

Method Summary

Methods declared in class java.awt.Component.AccessibleAWTComponent

Methods declared in class javax.accessibility.AccessibleContext

Methods declared in class java.lang.Object

Constructor Detail

AccessibleAWTTextComponent

Method Detail

textValueChanged

getAccessibleStateSet

getAccessibleRole

getAccessibleText

getIndexAtPoint

getCharacterBounds

getCharCount

getCaretPosition

getCharacterAttribute

getSelectionStart

getSelectionEnd

getSelectedText

getAtIndex

getAfterIndex

getBeforeIndex