Java Component.getInputMethodRequests方法代码示例

import java.awt.Component; //导入方法依赖的package包/类
/**
 * Creates the composition area.
 */
private void createCompositionArea() {
    synchronized(compositionAreaLock) {
        compositionArea = new CompositionArea();
        if (compositionAreaOwner != null) {
            compositionArea.setHandlerInfo(compositionAreaOwner, inputMethodContext);
        }
        // If the client component is an active client using below-the-spot style, then
        // make the composition window undecorated without a title bar.
        Component client = clientComponent.get();
        if(client != null){
            InputMethodRequests req = client.getInputMethodRequests();
            if (req != null && inputMethodContext.useBelowTheSpotInput()) {
                setCompositionAreaUndecorated(true);
            }
        }
    }
}
 

import java.awt.Component; //导入方法依赖的package包/类
/**
 * Returns the input method request handler of the client component.
 * When using the composition window for an active client (below-the-spot
 * input), input method requests that do not relate to the display of
 * the composed text are forwarded to the client component.
 */
InputMethodRequests getClientInputMethodRequests() {
    Component client = clientComponent.get();
    if (client != null) {
        return client.getInputMethodRequests();
    }

    return null;
}
 

import java.awt.Component; //导入方法依赖的package包/类
/**
 * Dispatches committed text to a client component.
 * Called by composition window.
 *
 * @param client The component that the text should get dispatched to.
 * @param text The iterator providing access to the committed
 *        (and possible composed) text.
 * @param committedCharacterCount The number of committed characters in the text.
 */
synchronized void dispatchCommittedText(Component client,
             AttributedCharacterIterator text,
             int committedCharacterCount) {
    // note that the client is not always the current client component -
    // some host input method adapters may dispatch input method events
    // through the Java event queue, and we may have switched clients while
    // the event was in the queue.
    if (committedCharacterCount == 0
            || text.getEndIndex() <= text.getBeginIndex()) {
        return;
    }
    long time = System.currentTimeMillis();
    dispatchingCommittedText = true;
    try {
        InputMethodRequests req = client.getInputMethodRequests();
        if (req != null) {
            // active client -> send text as InputMethodEvent
            int beginIndex = text.getBeginIndex();
            AttributedCharacterIterator toBeCommitted =
                (new AttributedString(text, beginIndex, beginIndex + committedCharacterCount)).getIterator();

            InputMethodEvent inputEvent = new InputMethodEvent(
                    client,
                    InputMethodEvent.INPUT_METHOD_TEXT_CHANGED,
                    toBeCommitted,
                    committedCharacterCount,
                    null, null);

            client.dispatchEvent(inputEvent);
        } else {
            // passive client -> send text as KeyEvents
            char keyChar = text.first();
            while (committedCharacterCount-- > 0 && keyChar != CharacterIterator.DONE) {
                KeyEvent keyEvent = new KeyEvent(client, KeyEvent.KEY_TYPED,
                                             time, 0, KeyEvent.VK_UNDEFINED, keyChar);
                client.dispatchEvent(keyEvent);
                keyChar = text.next();
            }
        }
    } finally {
        dispatchingCommittedText = false;
    }
}
 

import java.awt.Component; //导入方法依赖的package包/类
private boolean haveActiveClient() {
    Component client = getClientComponent();
    return client != null
           && client.getInputMethodRequests() != null;
}