diff options
Diffstat (limited to 'java/src/com/android/inputmethod/keyboard/LatinKeyboardView.java')
| -rw-r--r-- | java/src/com/android/inputmethod/keyboard/LatinKeyboardView.java | 691 |
1 files changed, 691 insertions, 0 deletions
diff --git a/java/src/com/android/inputmethod/keyboard/LatinKeyboardView.java b/java/src/com/android/inputmethod/keyboard/LatinKeyboardView.java new file mode 100644 index 000000000..be04b5a52 --- /dev/null +++ b/java/src/com/android/inputmethod/keyboard/LatinKeyboardView.java @@ -0,0 +1,691 @@ +/* + * Copyright (C) 2011 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.android.inputmethod.keyboard; + +import android.content.Context; +import android.content.pm.PackageManager; +import android.content.res.Resources; +import android.content.res.TypedArray; +import android.graphics.Canvas; +import android.os.Message; +import android.os.SystemClock; +import android.util.AttributeSet; +import android.util.Log; +import android.view.GestureDetector; +import android.view.LayoutInflater; +import android.view.MotionEvent; +import android.view.View; +import android.view.ViewConfiguration; +import android.view.accessibility.AccessibilityEvent; +import android.widget.PopupWindow; + +import com.android.inputmethod.accessibility.AccessibilityUtils; +import com.android.inputmethod.accessibility.AccessibleKeyboardViewProxy; +import com.android.inputmethod.deprecated.VoiceProxy; +import com.android.inputmethod.keyboard.PointerTracker.DrawingProxy; +import com.android.inputmethod.keyboard.PointerTracker.TimerProxy; +import com.android.inputmethod.latin.LatinIME; +import com.android.inputmethod.latin.R; +import com.android.inputmethod.latin.StaticInnerHandlerWrapper; +import com.android.inputmethod.latin.Utils; + +import java.util.WeakHashMap; + +/** + * A view that is responsible for detecting key presses and touch movements. + * + * @attr ref R.styleable#KeyboardView_keyHysteresisDistance + * @attr ref R.styleable#KeyboardView_verticalCorrection + * @attr ref R.styleable#KeyboardView_popupLayout + */ +public class LatinKeyboardView extends KeyboardView implements PointerTracker.KeyEventHandler, + SuddenJumpingTouchEventHandler.ProcessMotionEvent { + private static final String TAG = LatinKeyboardView.class.getSimpleName(); + + private static final boolean ENABLE_CAPSLOCK_BY_DOUBLETAP = true; + + private final SuddenJumpingTouchEventHandler mTouchScreenRegulator; + + // Timing constants + private final int mKeyRepeatInterval; + + // XML attribute + private final float mVerticalCorrection; + private final int mPopupLayout; + + // Mini keyboard + private PopupWindow mPopupWindow; + private PopupPanel mPopupPanel; + private int mPopupPanelPointerTrackerId; + private final WeakHashMap<Key, PopupPanel> mPopupPanelCache = + new WeakHashMap<Key, PopupPanel>(); + + /** Listener for {@link KeyboardActionListener}. */ + private KeyboardActionListener mKeyboardActionListener; + + private final boolean mHasDistinctMultitouch; + private int mOldPointerCount = 1; + private int mOldKeyIndex; + + protected KeyDetector mKeyDetector; + + // To detect double tap. + protected GestureDetector mGestureDetector; + + private final KeyTimerHandler mKeyTimerHandler = new KeyTimerHandler(this); + + private static class KeyTimerHandler extends StaticInnerHandlerWrapper<LatinKeyboardView> + implements TimerProxy { + private static final int MSG_REPEAT_KEY = 1; + private static final int MSG_LONGPRESS_KEY = 2; + private static final int MSG_IGNORE_DOUBLE_TAP = 3; + + private boolean mInKeyRepeat; + + public KeyTimerHandler(LatinKeyboardView outerInstance) { + super(outerInstance); + } + + @Override + public void handleMessage(Message msg) { + final LatinKeyboardView keyboardView = getOuterInstance(); + final PointerTracker tracker = (PointerTracker) msg.obj; + switch (msg.what) { + case MSG_REPEAT_KEY: + tracker.onRepeatKey(msg.arg1); + startKeyRepeatTimer(keyboardView.mKeyRepeatInterval, msg.arg1, tracker); + break; + case MSG_LONGPRESS_KEY: + keyboardView.openMiniKeyboardIfRequired(msg.arg1, tracker); + break; + } + } + + @Override + public void startKeyRepeatTimer(long delay, int keyIndex, PointerTracker tracker) { + mInKeyRepeat = true; + sendMessageDelayed(obtainMessage(MSG_REPEAT_KEY, keyIndex, 0, tracker), delay); + } + + public void cancelKeyRepeatTimer() { + mInKeyRepeat = false; + removeMessages(MSG_REPEAT_KEY); + } + + public boolean isInKeyRepeat() { + return mInKeyRepeat; + } + + @Override + public void startLongPressTimer(long delay, int keyIndex, PointerTracker tracker) { + cancelLongPressTimer(); + sendMessageDelayed(obtainMessage(MSG_LONGPRESS_KEY, keyIndex, 0, tracker), delay); + } + + @Override + public void cancelLongPressTimer() { + removeMessages(MSG_LONGPRESS_KEY); + } + + @Override + public void cancelKeyTimers() { + cancelKeyRepeatTimer(); + cancelLongPressTimer(); + removeMessages(MSG_IGNORE_DOUBLE_TAP); + } + + public void startIgnoringDoubleTap() { + sendMessageDelayed(obtainMessage(MSG_IGNORE_DOUBLE_TAP), + ViewConfiguration.getDoubleTapTimeout()); + } + + public boolean isIgnoringDoubleTap() { + return hasMessages(MSG_IGNORE_DOUBLE_TAP); + } + + public void cancelAllMessages() { + cancelKeyTimers(); + } + } + + private class DoubleTapListener extends GestureDetector.SimpleOnGestureListener { + private boolean mProcessingShiftDoubleTapEvent = false; + + @Override + public boolean onDoubleTap(MotionEvent firstDown) { + final Keyboard keyboard = getKeyboard(); + if (ENABLE_CAPSLOCK_BY_DOUBLETAP && keyboard instanceof LatinKeyboard + && ((LatinKeyboard) keyboard).isAlphaKeyboard()) { + final int pointerIndex = firstDown.getActionIndex(); + final int id = firstDown.getPointerId(pointerIndex); + final PointerTracker tracker = getPointerTracker(id); + // If the first down event is on shift key. + if (tracker.isOnShiftKey((int) firstDown.getX(), (int) firstDown.getY())) { + mProcessingShiftDoubleTapEvent = true; + return true; + } + } + mProcessingShiftDoubleTapEvent = false; + return false; + } + + @Override + public boolean onDoubleTapEvent(MotionEvent secondTap) { + if (mProcessingShiftDoubleTapEvent + && secondTap.getAction() == MotionEvent.ACTION_DOWN) { + final MotionEvent secondDown = secondTap; + final int pointerIndex = secondDown.getActionIndex(); + final int id = secondDown.getPointerId(pointerIndex); + final PointerTracker tracker = getPointerTracker(id); + // If the second down event is also on shift key. + if (tracker.isOnShiftKey((int) secondDown.getX(), (int) secondDown.getY())) { + // Detected a double tap on shift key. If we are in the ignoring double tap + // mode, it means we have already turned off caps lock in + // {@link KeyboardSwitcher#onReleaseShift} . + final boolean ignoringDoubleTap = mKeyTimerHandler.isIgnoringDoubleTap(); + if (!ignoringDoubleTap) + onDoubleTapShiftKey(tracker); + return true; + } + // Otherwise these events should not be handled as double tap. + mProcessingShiftDoubleTapEvent = false; + } + return mProcessingShiftDoubleTapEvent; + } + } + + public LatinKeyboardView(Context context, AttributeSet attrs) { + this(context, attrs, R.attr.keyboardViewStyle); + } + + public LatinKeyboardView(Context context, AttributeSet attrs, int defStyle) { + super(context, attrs, defStyle); + + mTouchScreenRegulator = new SuddenJumpingTouchEventHandler(getContext(), this); + + final TypedArray a = context.obtainStyledAttributes( + attrs, R.styleable.KeyboardView, defStyle, R.style.KeyboardView); + mVerticalCorrection = a.getDimensionPixelOffset( + R.styleable.KeyboardView_verticalCorrection, 0); + mPopupLayout = a.getResourceId(R.styleable.KeyboardView_popupLayout, 0); + a.recycle(); + + final Resources res = getResources(); + final float keyHysteresisDistance = res.getDimension(R.dimen.key_hysteresis_distance); + mKeyDetector = new KeyDetector(keyHysteresisDistance); + + final boolean ignoreMultitouch = true; + mGestureDetector = new GestureDetector( + getContext(), new DoubleTapListener(), null, ignoreMultitouch); + mGestureDetector.setIsLongpressEnabled(false); + + mHasDistinctMultitouch = context.getPackageManager() + .hasSystemFeature(PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT); + mKeyRepeatInterval = res.getInteger(R.integer.config_key_repeat_interval); + + PointerTracker.init(mHasDistinctMultitouch, getContext()); + } + + public void startIgnoringDoubleTap() { + if (ENABLE_CAPSLOCK_BY_DOUBLETAP) + mKeyTimerHandler.startIgnoringDoubleTap(); + } + + public void setKeyboardActionListener(KeyboardActionListener listener) { + mKeyboardActionListener = listener; + PointerTracker.setKeyboardActionListener(listener); + } + + /** + * Returns the {@link KeyboardActionListener} object. + * @return the listener attached to this keyboard + */ + @Override + public KeyboardActionListener getKeyboardActionListener() { + return mKeyboardActionListener; + } + + @Override + public KeyDetector getKeyDetector() { + return mKeyDetector; + } + + @Override + public DrawingProxy getDrawingProxy() { + return this; + } + + @Override + public TimerProxy getTimerProxy() { + return mKeyTimerHandler; + } + + @Override + public void setKeyPreviewPopupEnabled(boolean previewEnabled, int delay) { + final Keyboard keyboard = getKeyboard(); + if (keyboard instanceof LatinKeyboard) { + final LatinKeyboard latinKeyboard = (LatinKeyboard)keyboard; + if (latinKeyboard.isPhoneKeyboard() || latinKeyboard.isNumberKeyboard()) { + // Phone and number keyboard never shows popup preview. + super.setKeyPreviewPopupEnabled(false, delay); + return; + } + } + super.setKeyPreviewPopupEnabled(previewEnabled, delay); + } + + /** + * Attaches a keyboard to this view. The keyboard can be switched at any time and the + * view will re-layout itself to accommodate the keyboard. + * @see Keyboard + * @see #getKeyboard() + * @param keyboard the keyboard to display in this view + */ + @Override + public void setKeyboard(Keyboard keyboard) { + // Remove any pending messages, except dismissing preview + mKeyTimerHandler.cancelKeyTimers(); + super.setKeyboard(keyboard); + mKeyDetector.setKeyboard( + keyboard, -getPaddingLeft(), -getPaddingTop() + mVerticalCorrection); + mKeyDetector.setProximityThreshold(keyboard.mMostCommonKeyWidth); + PointerTracker.setKeyDetector(mKeyDetector); + mTouchScreenRegulator.setKeyboard(keyboard); + mPopupPanelCache.clear(); + } + + /** + * Returns whether the device has distinct multi-touch panel. + * @return true if the device has distinct multi-touch panel. + */ + public boolean hasDistinctMultitouch() { + return mHasDistinctMultitouch; + } + + /** + * When enabled, calls to {@link KeyboardActionListener#onCodeInput} will include key + * codes for adjacent keys. When disabled, only the primary key code will be + * reported. + * @param enabled whether or not the proximity correction is enabled + */ + public void setProximityCorrectionEnabled(boolean enabled) { + mKeyDetector.setProximityCorrectionEnabled(enabled); + } + + /** + * Returns true if proximity correction is enabled. + */ + public boolean isProximityCorrectionEnabled() { + return mKeyDetector.isProximityCorrectionEnabled(); + } + + @Override + public void cancelAllMessages() { + mKeyTimerHandler.cancelAllMessages(); + super.cancelAllMessages(); + } + + private boolean openMiniKeyboardIfRequired(int keyIndex, PointerTracker tracker) { + // Check if we have a popup layout specified first. + if (mPopupLayout == 0) { + return false; + } + + // Check if we are already displaying popup panel. + if (mPopupPanel != null) + return false; + final Key parentKey = tracker.getKey(keyIndex); + if (parentKey == null) + return false; + return onLongPress(parentKey, tracker); + } + + private void onDoubleTapShiftKey(@SuppressWarnings("unused") PointerTracker tracker) { + // When shift key is double tapped, the first tap is correctly processed as usual tap. And + // the second tap is treated as this double tap event, so that we need not mark tracker + // calling setAlreadyProcessed() nor remove the tracker from mPointerQueue. + mKeyboardActionListener.onCodeInput(Keyboard.CODE_CAPSLOCK, null, 0, 0); + } + + // This default implementation returns a popup mini keyboard panel. + protected PopupPanel onCreatePopupPanel(Key parentKey) { + if (parentKey.mPopupCharacters == null) + return null; + + final View container = LayoutInflater.from(getContext()).inflate(mPopupLayout, null); + if (container == null) + throw new NullPointerException(); + + final PopupMiniKeyboardView miniKeyboardView = + (PopupMiniKeyboardView)container.findViewById(R.id.mini_keyboard_view); + final Keyboard parentKeyboard = getKeyboard(); + final Keyboard miniKeyboard = new MiniKeyboard.Builder( + this, parentKeyboard.mPopupKeyboardResId, parentKey, parentKeyboard).build(); + miniKeyboardView.setKeyboard(miniKeyboard); + + container.measure(MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.AT_MOST), + MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)); + + return miniKeyboardView; + } + + @Override + protected boolean needsToDimKeyboard() { + return mPopupPanel != null; + } + + public void setSpacebarTextFadeFactor(float fadeFactor, LatinKeyboard oldKeyboard) { + final Keyboard keyboard = getKeyboard(); + // We should not set text fade factor to the keyboard which does not display the language on + // its spacebar. + if (keyboard instanceof LatinKeyboard && keyboard == oldKeyboard) { + ((LatinKeyboard)keyboard).setSpacebarTextFadeFactor(fadeFactor, this); + } + } + + /** + * Called when a key is long pressed. By default this will open mini keyboard associated + * with this key. + * @param parentKey the key that was long pressed + * @param tracker the pointer tracker which pressed the parent key + * @return true if the long press is handled, false otherwise. Subclasses should call the + * method on the base class if the subclass doesn't wish to handle the call. + */ + protected boolean onLongPress(Key parentKey, PointerTracker tracker) { + final int primaryCode = parentKey.mCode; + final Keyboard keyboard = getKeyboard(); + if (keyboard instanceof LatinKeyboard) { + final LatinKeyboard latinKeyboard = (LatinKeyboard) keyboard; + if (primaryCode == Keyboard.CODE_DIGIT0 && latinKeyboard.isPhoneKeyboard()) { + tracker.onLongPressed(); + // Long pressing on 0 in phone number keypad gives you a '+'. + return invokeOnKey(Keyboard.CODE_PLUS); + } + if (primaryCode == Keyboard.CODE_SHIFT && latinKeyboard.isAlphaKeyboard()) { + tracker.onLongPressed(); + return invokeOnKey(Keyboard.CODE_CAPSLOCK); + } + } + if (primaryCode == Keyboard.CODE_SETTINGS || primaryCode == Keyboard.CODE_SPACE) { + // Both long pressing settings key and space key invoke IME switcher dialog. + if (getKeyboardActionListener().onCustomRequest( + LatinIME.CODE_SHOW_INPUT_METHOD_PICKER)) { + tracker.onLongPressed(); + return true; + } else { + return openPopupPanel(parentKey, tracker); + } + } else { + return openPopupPanel(parentKey, tracker); + } + } + + private boolean invokeOnKey(int primaryCode) { + getKeyboardActionListener().onCodeInput(primaryCode, null, + KeyboardActionListener.NOT_A_TOUCH_COORDINATE, + KeyboardActionListener.NOT_A_TOUCH_COORDINATE); + return true; + } + + private boolean openPopupPanel(Key parentKey, PointerTracker tracker) { + PopupPanel popupPanel = mPopupPanelCache.get(parentKey); + if (popupPanel == null) { + popupPanel = onCreatePopupPanel(parentKey); + if (popupPanel == null) + return false; + mPopupPanelCache.put(parentKey, popupPanel); + } + if (mPopupWindow == null) { + mPopupWindow = new PopupWindow(getContext()); + mPopupWindow.setBackgroundDrawable(null); + mPopupWindow.setAnimationStyle(R.style.PopupMiniKeyboardAnimation); + // Allow popup window to be drawn off the screen. + mPopupWindow.setClippingEnabled(false); + } + mPopupPanel = popupPanel; + mPopupPanelPointerTrackerId = tracker.mPointerId; + + popupPanel.showPopupPanel(this, parentKey, tracker, mPopupWindow); + final int translatedX = popupPanel.translateX(tracker.getLastX()); + final int translatedY = popupPanel.translateY(tracker.getLastY()); + tracker.onShowPopupPanel(translatedX, translatedY, SystemClock.uptimeMillis(), popupPanel); + + invalidateAllKeys(); + return true; + } + + private PointerTracker getPointerTracker(final int id) { + return PointerTracker.getPointerTracker(id, this); + } + + public boolean isInSlidingKeyInput() { + if (mPopupPanel != null) { + return true; + } else { + return PointerTracker.isAnyInSlidingKeyInput(); + } + } + + public int getPointerCount() { + return mOldPointerCount; + } + + @Override + public boolean onTouchEvent(MotionEvent me) { + return mTouchScreenRegulator.onTouchEvent(me); + } + + @Override + public boolean processMotionEvent(MotionEvent me) { + final boolean nonDistinctMultitouch = !mHasDistinctMultitouch; + final int action = me.getActionMasked(); + final int pointerCount = me.getPointerCount(); + final int oldPointerCount = mOldPointerCount; + mOldPointerCount = pointerCount; + + // TODO: cleanup this code into a multi-touch to single-touch event converter class? + // If the device does not have distinct multi-touch support panel, ignore all multi-touch + // events except a transition from/to single-touch. + if (nonDistinctMultitouch && pointerCount > 1 && oldPointerCount > 1) { + return true; + } + + // Gesture detector must be enabled only when mini-keyboard is not on the screen. + if (mPopupPanel == null && mGestureDetector != null + && mGestureDetector.onTouchEvent(me)) { + PointerTracker.dismissAllKeyPreviews(); + mKeyTimerHandler.cancelKeyTimers(); + return true; + } + + final long eventTime = me.getEventTime(); + final int index = me.getActionIndex(); + final int id = me.getPointerId(index); + final int x, y; + if (mPopupPanel != null && id == mPopupPanelPointerTrackerId) { + x = mPopupPanel.translateX((int)me.getX(index)); + y = mPopupPanel.translateY((int)me.getY(index)); + } else { + x = (int)me.getX(index); + y = (int)me.getY(index); + } + + if (mKeyTimerHandler.isInKeyRepeat()) { + final PointerTracker tracker = getPointerTracker(id); + // Key repeating timer will be canceled if 2 or more keys are in action, and current + // event (UP or DOWN) is non-modifier key. + if (pointerCount > 1 && !tracker.isModifier()) { + mKeyTimerHandler.cancelKeyRepeatTimer(); + } + // Up event will pass through. + } + + // TODO: cleanup this code into a multi-touch to single-touch event converter class? + // Translate mutli-touch event to single-touch events on the device that has no distinct + // multi-touch panel. + if (nonDistinctMultitouch) { + // Use only main (id=0) pointer tracker. + PointerTracker tracker = getPointerTracker(0); + if (pointerCount == 1 && oldPointerCount == 2) { + // Multi-touch to single touch transition. + // Send a down event for the latest pointer if the key is different from the + // previous key. + final int newKeyIndex = tracker.getKeyIndexOn(x, y); + if (mOldKeyIndex != newKeyIndex) { + tracker.onDownEvent(x, y, eventTime, this); + if (action == MotionEvent.ACTION_UP) + tracker.onUpEvent(x, y, eventTime); + } + } else if (pointerCount == 2 && oldPointerCount == 1) { + // Single-touch to multi-touch transition. + // Send an up event for the last pointer. + final int lastX = tracker.getLastX(); + final int lastY = tracker.getLastY(); + mOldKeyIndex = tracker.getKeyIndexOn(lastX, lastY); + tracker.onUpEvent(lastX, lastY, eventTime); + } else if (pointerCount == 1 && oldPointerCount == 1) { + processMotionEvent(tracker, action, x, y, eventTime, this); + } else { + Log.w(TAG, "Unknown touch panel behavior: pointer count is " + pointerCount + + " (old " + oldPointerCount + ")"); + } + return true; + } + + if (action == MotionEvent.ACTION_MOVE) { + for (int i = 0; i < pointerCount; i++) { + final PointerTracker tracker = getPointerTracker(me.getPointerId(i)); + final int px, py; + if (mPopupPanel != null && tracker.mPointerId == mPopupPanelPointerTrackerId) { + px = mPopupPanel.translateX((int)me.getX(i)); + py = mPopupPanel.translateY((int)me.getY(i)); + } else { + px = (int)me.getX(i); + py = (int)me.getY(i); + } + tracker.onMoveEvent(px, py, eventTime); + } + } else { + processMotionEvent(getPointerTracker(id), action, x, y, eventTime, this); + } + + return true; + } + + private static void processMotionEvent(PointerTracker tracker, int action, int x, int y, + long eventTime, PointerTracker.KeyEventHandler handler) { + switch (action) { + case MotionEvent.ACTION_DOWN: + case MotionEvent.ACTION_POINTER_DOWN: + tracker.onDownEvent(x, y, eventTime, handler); + break; + case MotionEvent.ACTION_UP: + case MotionEvent.ACTION_POINTER_UP: + tracker.onUpEvent(x, y, eventTime); + break; + case MotionEvent.ACTION_MOVE: + tracker.onMoveEvent(x, y, eventTime); + break; + case MotionEvent.ACTION_CANCEL: + tracker.onCancelEvent(x, y, eventTime); + break; + } + } + + @Override + public void closing() { + super.closing(); + dismissPopupPanel(); + mPopupPanelCache.clear(); + } + + @Override + public boolean dismissPopupPanel() { + if (mPopupWindow != null && mPopupWindow.isShowing()) { + mPopupWindow.dismiss(); + mPopupPanel = null; + mPopupPanelPointerTrackerId = -1; + invalidateAllKeys(); + return true; + } + return false; + } + + public boolean handleBack() { + return dismissPopupPanel(); + } + + @Override + public void draw(Canvas c) { + Utils.GCUtils.getInstance().reset(); + boolean tryGC = true; + for (int i = 0; i < Utils.GCUtils.GC_TRY_LOOP_MAX && tryGC; ++i) { + try { + super.draw(c); + tryGC = false; + } catch (OutOfMemoryError e) { + tryGC = Utils.GCUtils.getInstance().tryGCOrWait("LatinKeyboardView", e); + } + } + } + + @Override + protected void onAttachedToWindow() { + // Token is available from here. + VoiceProxy.getInstance().onAttachedToWindow(); + } + + @Override + public boolean dispatchTouchEvent(MotionEvent event) { + // Drop non-hover touch events when touch exploration is enabled. + if (AccessibilityUtils.getInstance().isTouchExplorationEnabled()) { + return false; + } + + return super.dispatchTouchEvent(event); + } + + @Override + public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { + if (AccessibilityUtils.getInstance().isTouchExplorationEnabled()) { + final PointerTracker tracker = getPointerTracker(0); + return AccessibleKeyboardViewProxy.getInstance().dispatchPopulateAccessibilityEvent( + event, tracker) || super.dispatchPopulateAccessibilityEvent(event); + } + + return super.dispatchPopulateAccessibilityEvent(event); + } + + /** + * Receives hover events from the input framework. This method overrides + * View.dispatchHoverEvent(MotionEvent) on SDK version ICS or higher. On + * lower SDK versions, this method is never called. + * + * @param event The motion event to be dispatched. + * @return {@code true} if the event was handled by the view, {@code false} + * otherwise + */ + public boolean dispatchHoverEvent(MotionEvent event) { + if (AccessibilityUtils.getInstance().isTouchExplorationEnabled()) { + final PointerTracker tracker = getPointerTracker(0); + return AccessibleKeyboardViewProxy.getInstance().dispatchHoverEvent(event, tracker); + } + + // Reflection doesn't support calling superclass methods. + return false; + } +} |