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Java 2 Platform SE v1.3.1: Class InputMethodEvent
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JavaTM 2 Platform
Std. Ed. v1.3.1
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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.

Since:
1.2
See Also:
Serialized Form

Field Summary
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, HIERARCHY_BOUNDS_EVENT_MASK, HIERARCHY_EVENT_MASK, id, INPUT_METHOD_EVENT_MASK, INVOCATION_EVENT_MASK, ITEM_EVENT_MASK, KEY_EVENT_MASK, MOUSE_EVENT_MASK, MOUSE_MOTION_EVENT_MASK, PAINT_EVENT_MASK, RESERVED_ID_MAX, TEXT_EVENT_MASK, WINDOW_EVENT_MASK
 
Fields inherited from class java.util.EventObject
source
 
Constructor Summary
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, TextHitInfo caret, TextHitInfo visiblePosition)
          Constructs an InputMethodEvent with the specified source component, type, caret, and visiblePosition.
 
Method Summary
 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.
 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
finalize, getID, toString
 
Methods inherited from class java.util.EventObject
getSource
 
Methods inherited from class java.lang.Object
clone, equals, 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.

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.

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.

INPUT_METHOD_LAST

public static final int INPUT_METHOD_LAST
Marks the last integer id for the range of input method event ids.
Constructor Detail

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.

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, 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.

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.
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()

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
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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

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