Java java.awt Class TextComponent.AccessibleAWTTextComponent（JDK8）

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

• 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 indicies)

  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