java.awt.event

Class InputMethodEvent

java.lang.Object

java.util.EventObject

java.awt.AWTEvent

java.awt.event.InputMethodEvent

All Implemented Interfaces:

Serializable

public class InputMethodEvent
extends AWTEvent

Input method events contain information about text that is being composed using an input method. Whenever the text changes, the input method sends an event. If the text component that's currently using the input method is an active client, the event is dispatched to that component. Otherwise, it is dispatched to a separate composition window.

The text included with the input method event consists of two parts: committed text and composed text. Either part may be empty. The two parts together replace any uncommitted composed text sent in previous events, or the currently selected committed text. Committed text should be integrated into the text component's persistent data, it will not be sent again. Composed text may be sent repeatedly, with changes to reflect the user's editing operations. Committed text always precedes composed text.

Note: The timestamps used by this class report the difference, measured in milliseconds, between the time of the event and midnight, January 1, 1970 UTC (similar to System.currentTimeMillis).

Since:

1.2

Version:

1.20 01/23/03

Author:

JavaSoft Asia/Pacific

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static int	CARET_POSITION_CHANGED The event type indicating a changed insertion point in input method text.
static int	INPUT_METHOD_FIRST Marks the first integer id for the range of input method event ids.
static int	INPUT_METHOD_LAST Marks the last integer id for the range of input method event ids.
static int	INPUT_METHOD_TEXT_CHANGED The event type indicating changed input method text.

Fields inherited from class java.awt.AWTEvent

ACTION_EVENT_MASK, ADJUSTMENT_EVENT_MASK, COMPONENT_EVENT_MASK, consumed, CONTAINER_EVENT_MASK, FOCUS_EVENT_MASK, id, INPUT_METHOD_EVENT_MASK, INVOCATION_EVENT_MASK, ITEM_EVENT_MASK, KEY_EVENT_MASK, MOUSE_EVENT_MASK, MOUSE_MOTION_EVENT_MASK, MOUSE_WHEEL_EVENT_MASK, PAINT_EVENT_MASK, RESERVED_ID_MAX, TEXT_EVENT_MASK, WINDOW_EVENT_MASK, WINDOW_FOCUS_EVENT_MASK

Fields inherited from class java.util.EventObject

source

Constructor Summary

Constructors

Constructor and Description
InputMethodEvent(Component source, int id, AttributedCharacterIterator text, int committedCharacterCount, TextHitInfo caret, TextHitInfo visiblePosition) Constructs an InputMethodEvent with the specified source component, type, text, caret, and visiblePosition.
InputMethodEvent(Component source, int id, long when, AttributedCharacterIterator text, int committedCharacterCount, TextHitInfo caret, TextHitInfo visiblePosition) Constructs an InputMethodEvent with the specified source component, type, time, text, caret, and visiblePosition.
InputMethodEvent(Component source, int id, TextHitInfo caret, TextHitInfo visiblePosition) Constructs an InputMethodEvent with the specified source component, type, caret, and visiblePosition.

Method Summary

Methods

Modifier and Type	Method and Description
void	consume() Consumes this event so that it will not be processed in the default manner by the source which originated it.
TextHitInfo	getCaret() Gets the caret.
int	getCommittedCharacterCount() Gets the number of committed characters in the text.
AttributedCharacterIterator	getText() Gets the combined committed and composed text.
TextHitInfo	getVisiblePosition() Gets the position that's most important to be visible.
long	getWhen() Returns the time stamp of when this event occurred.
boolean	isConsumed() Returns whether or not this event has been consumed.
String	paramString() Returns a parameter string identifying this event.

Methods inherited from class java.awt.AWTEvent

getID, toString

Methods inherited from class java.util.EventObject

getSource

Methods inherited from class java.lang.Object

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

Field Detail

INPUT_METHOD_FIRST

public static final int INPUT_METHOD_FIRST

Marks the first integer id for the range of input method event ids.

See Also:

Constant Field Values

INPUT_METHOD_TEXT_CHANGED

public static final int INPUT_METHOD_TEXT_CHANGED

The event type indicating changed input method text. This event is generated by input methods while processing input.

See Also:

Constant Field Values

CARET_POSITION_CHANGED

public static final int CARET_POSITION_CHANGED

The event type indicating a changed insertion point in input method text. This event is generated by input methods while processing input if only the caret changed.

See Also:

Constant Field Values

INPUT_METHOD_LAST

public static final int INPUT_METHOD_LAST

Marks the last integer id for the range of input method event ids.

See Also:

Constant Field Values

Constructor Detail

InputMethodEvent

public InputMethodEvent(Component source,
                int id,
                long when,
                AttributedCharacterIterator text,
                int committedCharacterCount,
                TextHitInfo caret,
                TextHitInfo visiblePosition)

Constructs an InputMethodEvent with the specified source component, type, time, text, caret, and visiblePosition.

The offsets of caret and visiblePosition are relative to the current composed text; that is, the composed text within text if this is an INPUT_METHOD_TEXT_CHANGED event, the composed text within the text of the preceding INPUT_METHOD_TEXT_CHANGED event otherwise.

Parameters:

source - the object where the event originated

id - the event type

when - a long integer that specifies the time the event occurred

text - the combined committed and composed text, committed text first; must be null when the event type is CARET_POSITION_CHANGED; may be null for INPUT_METHOD_TEXT_CHANGED if there's no committed or composed text

committedCharacterCount - the number of committed characters in the text

caret - the caret (a.k.a. insertion point); null if there's no caret within current composed text

visiblePosition - the position that's most important to be visible; null if there's no recommendation for a visible position within current composed text

Throws:

IllegalArgumentException - if id is not in the range INPUT_METHOD_FIRST..INPUT_METHOD_LAST; or if id is CARET_POSITION_CHANGED and text is not null; or if committedCharacterCount is not in the range 0..(text.getEndIndex() - text.getBeginIndex())

Since:

1.4

InputMethodEvent

public InputMethodEvent(Component source,
                int id,
                AttributedCharacterIterator text,
                int committedCharacterCount,
                TextHitInfo caret,
                TextHitInfo visiblePosition)

Constructs an InputMethodEvent with the specified source component, type, text, caret, and visiblePosition.

The offsets of caret and visiblePosition are relative to the current composed text; that is, the composed text within text if this is an INPUT_METHOD_TEXT_CHANGED event, the composed text within the text of the preceding INPUT_METHOD_TEXT_CHANGED event otherwise. The time stamp for this event is initialized by invoking EventQueue.getMostRecentEventTime().

Parameters:

source - the object where the event originated

id - the event type

text - the combined committed and composed text, committed text first; must be null when the event type is CARET_POSITION_CHANGED; may be null for INPUT_METHOD_TEXT_CHANGED if there's no committed or composed text

committedCharacterCount - the number of committed characters in the text

caret - the caret (a.k.a. insertion point); null if there's no caret within current composed text

visiblePosition - the position that's most important to be visible; null if there's no recommendation for a visible position within current composed text

Throws:

IllegalArgumentException - if id is not in the range INPUT_METHOD_FIRST..INPUT_METHOD_LAST; or if id is CARET_POSITION_CHANGED and text is not null; or if committedCharacterCount is not in the range 0..(text.getEndIndex() - text.getBeginIndex())

InputMethodEvent

public InputMethodEvent(Component source,
                int id,
                TextHitInfo caret,
                TextHitInfo visiblePosition)

Constructs an InputMethodEvent with the specified source component, type, caret, and visiblePosition. The text is set to null, committedCharacterCount to 0.

The offsets of caret and visiblePosition are relative to the current composed text; that is, the composed text within the text of the preceding INPUT_METHOD_TEXT_CHANGED event if the event being constructed as a CARET_POSITION_CHANGED event. For an INPUT_METHOD_TEXT_CHANGED event without text, caret and visiblePosition must be null. The time stamp for this event is initialized by invoking EventQueue.getMostRecentEventTime().

Parameters:

source - the object where the event originated

id - the event type

caret - the caret (a.k.a. insertion point); null if there's no caret within current composed text

visiblePosition - the position that's most important to be visible; null if there's no recommendation for a visible position within current composed text

Throws:

IllegalArgumentException - if id is not in the range INPUT_METHOD_FIRST..INPUT_METHOD_LAST

Method Detail

getText

public AttributedCharacterIterator getText()

Gets the combined committed and composed text. Characters from index 0 to index getCommittedCharacterCount() - 1 are committed text, the remaining characters are composed text.

Returns:

the text. Always null for CARET_POSITION_CHANGED; may be null for INPUT_METHOD_TEXT_CHANGED if there's no composed or committed text.

getCommittedCharacterCount

public int getCommittedCharacterCount()

Gets the number of committed characters in the text.

getCaret

public TextHitInfo getCaret()

Gets the caret.

The offset of the caret is relative to the current composed text; that is, the composed text within getText() if this is an INPUT_METHOD_TEXT_CHANGED event, the composed text within getText() of the preceding INPUT_METHOD_TEXT_CHANGED event otherwise.

Returns:

the caret (a.k.a. insertion point). Null if there's no caret within current composed text.

getVisiblePosition

public TextHitInfo getVisiblePosition()

Gets the position that's most important to be visible.

The offset of the visible position is relative to the current composed text; that is, the composed text within getText() if this is an INPUT_METHOD_TEXT_CHANGED event, the composed text within getText() of the preceding INPUT_METHOD_TEXT_CHANGED event otherwise.

Returns:

the position that's most important to be visible. Null if there's no recommendation for a visible position within current composed text.

consume

public void consume()

Consumes this event so that it will not be processed in the default manner by the source which originated it.

Overrides:

consume in class AWTEvent

isConsumed

public boolean isConsumed()

Returns whether or not this event has been consumed.

Overrides:

isConsumed in class AWTEvent

See Also:

consume()

getWhen

public long getWhen()

Returns the time stamp of when this event occurred.

Returns:

this event's timestamp

Since:

1.4

paramString

public String paramString()

Returns a parameter string identifying this event. This method is useful for event-logging and for debugging. It contains the event ID in text form, the characters of the committed and composed text separated by "+", the number of committed characters, the caret, and the visible position.

Overrides:

paramString in class AWTEvent

Returns:

a string identifying the event and its attributes