/* * Copyright (C) 2010 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 com.android.inputmethod.latin.LatinImeLogger; import com.android.inputmethod.latin.R; import android.content.Context; import android.content.pm.PackageManager; import android.content.res.Resources; import android.content.res.TypedArray; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Paint.Align; import android.graphics.PorterDuff; import android.graphics.Rect; import android.graphics.Region.Op; import android.graphics.Typeface; import android.graphics.drawable.Drawable; import android.os.Handler; import android.os.Message; import android.os.SystemClock; import android.util.AttributeSet; import android.util.Log; import android.util.TypedValue; import android.view.GestureDetector; import android.view.Gravity; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.widget.FrameLayout; import android.widget.LinearLayout; import android.widget.PopupWindow; import android.widget.TextView; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.WeakHashMap; /** * A view that renders a virtual {@link Keyboard}. It handles rendering of keys and detecting key * presses and touch movements. * * @attr ref R.styleable#KeyboardView_keyBackground * @attr ref R.styleable#KeyboardView_keyPreviewLayout * @attr ref R.styleable#KeyboardView_keyPreviewOffset * @attr ref R.styleable#KeyboardView_labelTextSize * @attr ref R.styleable#KeyboardView_keyTextSize * @attr ref R.styleable#KeyboardView_keyTextColor * @attr ref R.styleable#KeyboardView_verticalCorrection * @attr ref R.styleable#KeyboardView_popupLayout */ public class KeyboardView extends View implements PointerTracker.UIProxy { private static final String TAG = KeyboardView.class.getSimpleName(); private static final boolean DEBUG_SHOW_ALIGN = false; private static final boolean DEBUG_KEYBOARD_GRID = false; private static final boolean ENABLE_CAPSLOCK_BY_LONGPRESS = false; private static final boolean ENABLE_CAPSLOCK_BY_DOUBLETAP = true; public static final int COLOR_SCHEME_WHITE = 0; public static final int COLOR_SCHEME_BLACK = 1; // Timing constants private final int mKeyRepeatInterval; // Miscellaneous constants private static final int[] LONG_PRESSABLE_STATE_SET = { android.R.attr.state_long_pressable }; private static final int HINT_ICON_VERTICAL_ADJUSTMENT_PIXEL = -1; // XML attribute private int mKeyLetterSize; private int mKeyTextColor; private int mKeyTextColorDisabled; private Typeface mKeyLetterStyle = Typeface.DEFAULT; private int mLabelTextSize; private int mColorScheme = COLOR_SCHEME_WHITE; private int mShadowColor; private float mShadowRadius; private Drawable mKeyBackground; private float mBackgroundDimAmount; private float mKeyHysteresisDistance; private float mVerticalCorrection; private int mPreviewOffset; private int mPreviewHeight; private int mPopupLayout; // Main keyboard private Keyboard mKeyboard; // Key preview private boolean mInForeground; private TextView mPreviewText; private int mPreviewTextSizeLarge; private final int[] mOffsetInWindow = new int[2]; private boolean mShowKeyPreview = true; private int mKeyPreviewDisplayedY; private final int mDelayBeforePreview; private final int mDelayAfterPreview; private ViewGroup mPreviewPlacer; // Mini keyboard private PopupWindow mMiniKeyboardWindow; private KeyboardView mMiniKeyboardView; private final WeakHashMap mMiniKeyboardCache = new WeakHashMap(); private int mMiniKeyboardOriginX; private int mMiniKeyboardOriginY; private long mMiniKeyboardDisplayedTime; private int[] mWindowOffset; private final float mMiniKeyboardSlideAllowance; private int mMiniKeyboardTrackerId; private final boolean mConfigShowMiniKeyboardAtTouchedPoint; /** Listener for {@link KeyboardActionListener}. */ private KeyboardActionListener mKeyboardActionListener; private final ArrayList mPointerTrackers = new ArrayList(); // TODO: Let the PointerTracker class manage this pointer queue private final PointerTrackerQueue mPointerQueue = new PointerTrackerQueue(); private final boolean mHasDistinctMultitouch; private int mOldPointerCount = 1; private int mOldKeyIndex; // Accessibility private boolean mIsAccessibilityEnabled; protected KeyDetector mKeyDetector = new KeyDetector(); // Swipe gesture detector private GestureDetector mGestureDetector; private final SwipeTracker mSwipeTracker = new SwipeTracker(); private final int mSwipeThreshold; private final boolean mDisambiguateSwipe; // Drawing /** Whether the keyboard bitmap needs to be redrawn before it's blitted. **/ private boolean mDrawPending; /** Notes if the keyboard just changed, so that we could possibly reallocate the mBuffer. */ private boolean mKeyboardChanged; /** The dirty region in the keyboard bitmap */ private final Rect mDirtyRect = new Rect(); /** The key to invalidate. */ private Key mInvalidatedKey; /** The dirty region for single key drawing */ private final Rect mInvalidatedKeyRect = new Rect(); /** The keyboard bitmap for faster updates */ private Bitmap mBuffer; /** The canvas for the above mutable keyboard bitmap */ private Canvas mCanvas; private final Paint mPaint; private final Rect mPadding; // This map caches key label text height in pixel as value and key label text size as map key. private final HashMap mTextHeightCache = new HashMap(); // Distance from horizontal center of the key, proportional to key label text height and width. private final float KEY_LABEL_VERTICAL_ADJUSTMENT_FACTOR_CENTER = 0.45f; private final float KEY_LABEL_VERTICAL_PADDING_FACTOR = 1.60f; private final String KEY_LABEL_REFERENCE_CHAR = "H"; private final int KEY_LABEL_OPTION_ALIGN_LEFT = 1; private final int KEY_LABEL_OPTION_ALIGN_RIGHT = 2; private final int KEY_LABEL_OPTION_ALIGN_BOTTOM = 8; private final int KEY_LABEL_OPTION_FONT_NORMAL = 16; private final int mKeyLabelHorizontalPadding; private final UIHandler mHandler = new UIHandler(); class UIHandler extends Handler { private static final int MSG_SHOW_KEY_PREVIEW = 1; private static final int MSG_DISMISS_KEY_PREVIEW = 2; private static final int MSG_REPEAT_KEY = 3; private static final int MSG_LONGPRESS_KEY = 4; private static final int MSG_LONGPRESS_SHIFT_KEY = 5; private boolean mInKeyRepeat; @Override public void handleMessage(Message msg) { switch (msg.what) { case MSG_SHOW_KEY_PREVIEW: showKey(msg.arg1, (PointerTracker)msg.obj); break; case MSG_DISMISS_KEY_PREVIEW: mPreviewText.setVisibility(View.INVISIBLE); break; case MSG_REPEAT_KEY: { final PointerTracker tracker = (PointerTracker)msg.obj; tracker.onRepeatKey(msg.arg1); startKeyRepeatTimer(mKeyRepeatInterval, msg.arg1, tracker); break; } case MSG_LONGPRESS_KEY: { final PointerTracker tracker = (PointerTracker)msg.obj; openMiniKeyboardIfRequired(msg.arg1, tracker); break; } case MSG_LONGPRESS_SHIFT_KEY: { final PointerTracker tracker = (PointerTracker)msg.obj; onLongPressShiftKey(tracker); break; } } } public void showKeyPreview(long delay, int keyIndex, PointerTracker tracker) { removeMessages(MSG_SHOW_KEY_PREVIEW); if (mPreviewText.getVisibility() == VISIBLE || delay == 0) { // Show right away, if it's already visible and finger is moving around showKey(keyIndex, tracker); } else { sendMessageDelayed( obtainMessage(MSG_SHOW_KEY_PREVIEW, keyIndex, 0, tracker), delay); } } public void cancelShowKeyPreview(PointerTracker tracker) { removeMessages(MSG_SHOW_KEY_PREVIEW, tracker); } public void cancelAllShowKeyPreviews() { removeMessages(MSG_SHOW_KEY_PREVIEW); } public void dismissKeyPreview(long delay, PointerTracker tracker) { sendMessageDelayed(obtainMessage(MSG_DISMISS_KEY_PREVIEW, tracker), delay); } public void cancelDismissKeyPreview(PointerTracker tracker) { removeMessages(MSG_DISMISS_KEY_PREVIEW, tracker); } public void cancelAllDismissKeyPreviews() { removeMessages(MSG_DISMISS_KEY_PREVIEW); } 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; } public void startLongPressTimer(long delay, int keyIndex, PointerTracker tracker) { cancelLongPressTimers(); sendMessageDelayed(obtainMessage(MSG_LONGPRESS_KEY, keyIndex, 0, tracker), delay); } public void startLongPressShiftTimer(long delay, int keyIndex, PointerTracker tracker) { cancelLongPressTimers(); if (ENABLE_CAPSLOCK_BY_LONGPRESS) { sendMessageDelayed( obtainMessage(MSG_LONGPRESS_SHIFT_KEY, keyIndex, 0, tracker), delay); } } public void cancelLongPressTimers() { removeMessages(MSG_LONGPRESS_KEY); removeMessages(MSG_LONGPRESS_SHIFT_KEY); } public void cancelKeyTimers() { cancelKeyRepeatTimer(); cancelLongPressTimers(); } public void cancelAllMessages() { cancelKeyTimers(); cancelAllShowKeyPreviews(); cancelAllDismissKeyPreviews(); } } public KeyboardView(Context context, AttributeSet attrs) { this(context, attrs, R.attr.keyboardViewStyle); } public KeyboardView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); final TypedArray a = context.obtainStyledAttributes( attrs, R.styleable.KeyboardView, defStyle, R.style.KeyboardView); int previewLayout = 0; int keyTextSize = 0; int n = a.getIndexCount(); for (int i = 0; i < n; i++) { int attr = a.getIndex(i); switch (attr) { case R.styleable.KeyboardView_keyBackground: mKeyBackground = a.getDrawable(attr); break; case R.styleable.KeyboardView_keyHysteresisDistance: mKeyHysteresisDistance = a.getDimensionPixelOffset(attr, 0); break; case R.styleable.KeyboardView_verticalCorrection: mVerticalCorrection = a.getDimensionPixelOffset(attr, 0); break; case R.styleable.KeyboardView_keyPreviewLayout: previewLayout = a.getResourceId(attr, 0); break; case R.styleable.KeyboardView_keyPreviewOffset: mPreviewOffset = a.getDimensionPixelOffset(attr, 0); break; case R.styleable.KeyboardView_keyPreviewHeight: mPreviewHeight = a.getDimensionPixelSize(attr, 80); break; case R.styleable.KeyboardView_keyLetterSize: mKeyLetterSize = a.getDimensionPixelSize(attr, 18); break; case R.styleable.KeyboardView_keyTextColor: mKeyTextColor = a.getColor(attr, 0xFF000000); break; case R.styleable.KeyboardView_keyTextColorDisabled: mKeyTextColorDisabled = a.getColor(attr, 0xFF000000); break; case R.styleable.KeyboardView_labelTextSize: mLabelTextSize = a.getDimensionPixelSize(attr, 14); break; case R.styleable.KeyboardView_popupLayout: mPopupLayout = a.getResourceId(attr, 0); break; case R.styleable.KeyboardView_shadowColor: mShadowColor = a.getColor(attr, 0); break; case R.styleable.KeyboardView_shadowRadius: mShadowRadius = a.getFloat(attr, 0f); break; // TODO: Use Theme (android.R.styleable.Theme_backgroundDimAmount) case R.styleable.KeyboardView_backgroundDimAmount: mBackgroundDimAmount = a.getFloat(attr, 0.5f); break; case R.styleable.KeyboardView_keyLetterStyle: mKeyLetterStyle = Typeface.defaultFromStyle(a.getInt(attr, Typeface.NORMAL)); break; case R.styleable.KeyboardView_colorScheme: mColorScheme = a.getInt(attr, COLOR_SCHEME_WHITE); break; } } final Resources res = getResources(); if (previewLayout != 0) { mPreviewText = (TextView) LayoutInflater.from(context).inflate(previewLayout, null); mPreviewTextSizeLarge = (int) res.getDimension(R.dimen.key_preview_text_size_large); } else { mShowKeyPreview = false; } mDelayBeforePreview = res.getInteger(R.integer.config_delay_before_preview); mDelayAfterPreview = res.getInteger(R.integer.config_delay_after_preview); mKeyLabelHorizontalPadding = (int)res.getDimension( R.dimen.key_label_horizontal_alignment_padding); mMiniKeyboardWindow = new PopupWindow(context); mMiniKeyboardWindow.setBackgroundDrawable(null); mMiniKeyboardWindow.setAnimationStyle(R.style.MiniKeyboardAnimation); // Allow popup window to be drawn off the screen. mMiniKeyboardWindow.setClippingEnabled(false); mPaint = new Paint(); mPaint.setAntiAlias(true); mPaint.setTextSize(keyTextSize); mPaint.setTextAlign(Align.CENTER); mPaint.setAlpha(255); mPadding = new Rect(0, 0, 0, 0); mKeyBackground.getPadding(mPadding); mSwipeThreshold = (int) (500 * res.getDisplayMetrics().density); // TODO: Refer frameworks/base/core/res/res/values/config.xml mDisambiguateSwipe = res.getBoolean(R.bool.config_swipeDisambiguation); mMiniKeyboardSlideAllowance = res.getDimension(R.dimen.mini_keyboard_slide_allowance); mConfigShowMiniKeyboardAtTouchedPoint = res.getBoolean( R.bool.config_show_mini_keyboard_at_touched_point); GestureDetector.SimpleOnGestureListener listener = new GestureDetector.SimpleOnGestureListener() { private boolean mProcessingShiftDoubleTapEvent = false; @Override public boolean onFling(MotionEvent me1, MotionEvent me2, float velocityX, float velocityY) { final float absX = Math.abs(velocityX); final float absY = Math.abs(velocityY); float deltaY = me2.getY() - me1.getY(); int travelY = getHeight() / 2; // Half the keyboard height mSwipeTracker.computeCurrentVelocity(1000); final float endingVelocityY = mSwipeTracker.getYVelocity(); if (velocityY > mSwipeThreshold && absX < absY / 2 && deltaY > travelY) { if (mDisambiguateSwipe && endingVelocityY >= velocityY / 4) { onSwipeDown(); return true; } } return false; } @Override public boolean onDoubleTap(MotionEvent firstDown) { if (ENABLE_CAPSLOCK_BY_DOUBLETAP && mKeyboard instanceof LatinKeyboard && ((LatinKeyboard) mKeyboard).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())) { onDoubleTapShiftKey(tracker); return true; } // Otherwise these events should not be handled as double tap. mProcessingShiftDoubleTapEvent = false; } return mProcessingShiftDoubleTapEvent; } }; final boolean ignoreMultitouch = true; mGestureDetector = new GestureDetector(getContext(), listener, null, ignoreMultitouch); mGestureDetector.setIsLongpressEnabled(false); mHasDistinctMultitouch = context.getPackageManager() .hasSystemFeature(PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT); mKeyRepeatInterval = res.getInteger(R.integer.config_key_repeat_interval); } public void setOnKeyboardActionListener(KeyboardActionListener listener) { mKeyboardActionListener = listener; for (PointerTracker tracker : mPointerTrackers) { tracker.setOnKeyboardActionListener(listener); } } /** * Returns the {@link KeyboardActionListener} object. * @return the listener attached to this keyboard */ protected KeyboardActionListener getOnKeyboardActionListener() { return mKeyboardActionListener; } /** * 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 */ public void setKeyboard(Keyboard keyboard) { if (mKeyboard != null) { dismissAllKeyPreviews(); } // Remove any pending messages, except dismissing preview mHandler.cancelKeyTimers(); mHandler.cancelAllShowKeyPreviews(); mKeyboard = keyboard; LatinImeLogger.onSetKeyboard(keyboard); mKeyDetector.setKeyboard(keyboard, -getPaddingLeft(), -getPaddingTop() + mVerticalCorrection); for (PointerTracker tracker : mPointerTrackers) { tracker.setKeyboard(keyboard, mKeyHysteresisDistance); } requestLayout(); mKeyboardChanged = true; invalidateAllKeys(); mKeyDetector.setProximityThreshold(keyboard.getMostCommonKeyWidth()); mMiniKeyboardCache.clear(); } /** * Returns the current keyboard being displayed by this view. * @return the currently attached keyboard * @see #setKeyboard(Keyboard) */ public Keyboard getKeyboard() { return mKeyboard; } /** * Returns whether the device has distinct multi-touch panel. * @return true if the device has distinct multi-touch panel. */ @Override public boolean hasDistinctMultitouch() { return mHasDistinctMultitouch; } /** * Enables or disables accessibility. * @param accessibilityEnabled whether or not to enable accessibility */ public void setAccessibilityEnabled(boolean accessibilityEnabled) { mIsAccessibilityEnabled = accessibilityEnabled; // Propagate this change to all existing pointer trackers. for (PointerTracker tracker : mPointerTrackers) { tracker.setAccessibilityEnabled(accessibilityEnabled); } } /** * Returns whether the device has accessibility enabled. * @return true if the device has accessibility enabled. */ @Override public boolean isAccessibilityEnabled() { return mIsAccessibilityEnabled; } /** * Enables or disables the key feedback preview. This is a preview that shows a magnified * version of the depressed key. By default the preview is enabled. * @param previewEnabled whether or not to enable the key feedback preview * @see #isKeyPreviewEnabled() */ public void setKeyPreviewEnabled(boolean previewEnabled) { mShowKeyPreview = previewEnabled; } /** * Returns the enabled state of the key feedback preview * @return whether or not the key feedback preview is enabled * @see #setKeyPreviewEnabled(boolean) */ public boolean isKeyPreviewEnabled() { return mShowKeyPreview; } public int getColorScheme() { return mColorScheme; } /** * 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(); } protected CharSequence adjustCase(CharSequence label) { if (mKeyboard.isShiftedOrShiftLocked() && label != null && label.length() < 3 && Character.isLowerCase(label.charAt(0))) { return label.toString().toUpperCase(); } return label; } @Override public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { // Round up a little if (mKeyboard == null) { setMeasuredDimension( getPaddingLeft() + getPaddingRight(), getPaddingTop() + getPaddingBottom()); } else { int width = mKeyboard.getMinWidth() + getPaddingLeft() + getPaddingRight(); if (MeasureSpec.getSize(widthMeasureSpec) < width + 10) { width = MeasureSpec.getSize(widthMeasureSpec); } setMeasuredDimension( width, mKeyboard.getHeight() + getPaddingTop() + getPaddingBottom()); } } @Override public void onDraw(Canvas canvas) { super.onDraw(canvas); if (mDrawPending || mBuffer == null || mKeyboardChanged) { onBufferDraw(); } canvas.drawBitmap(mBuffer, 0, 0, null); } private void onBufferDraw() { final int width = getWidth(); final int height = getHeight(); if (width == 0 || height == 0) return; if (mBuffer == null || mKeyboardChanged) { mKeyboardChanged = false; mDirtyRect.union(0, 0, width, height); } if (mBuffer == null || mBuffer.getWidth() != width || mBuffer.getHeight() != height) { mBuffer = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); mCanvas = new Canvas(mBuffer); } final Canvas canvas = mCanvas; canvas.clipRect(mDirtyRect, Op.REPLACE); canvas.drawColor(Color.BLACK, PorterDuff.Mode.CLEAR); if (mKeyboard == null) return; if (mInvalidatedKey != null && mInvalidatedKeyRect.contains(mDirtyRect)) { // Draw a single key. onBufferDrawKey(canvas, mInvalidatedKey); } else { // Draw all keys. for (final Key key : mKeyboard.getKeys()) { onBufferDrawKey(canvas, key); } } // TODO: Move this function to ProximityInfo for getting rid of // public declarations for // GRID_WIDTH and GRID_HEIGHT if (DEBUG_KEYBOARD_GRID) { Paint p = new Paint(); p.setStyle(Paint.Style.STROKE); p.setStrokeWidth(1.0f); p.setColor(0x800000c0); int cw = (mKeyboard.getMinWidth() + mKeyboard.GRID_WIDTH - 1) / mKeyboard.GRID_WIDTH; int ch = (mKeyboard.getHeight() + mKeyboard.GRID_HEIGHT - 1) / mKeyboard.GRID_HEIGHT; for (int i = 0; i <= mKeyboard.GRID_WIDTH; i++) canvas.drawLine(i * cw, 0, i * cw, ch * mKeyboard.GRID_HEIGHT, p); for (int i = 0; i <= mKeyboard.GRID_HEIGHT; i++) canvas.drawLine(0, i * ch, cw * mKeyboard.GRID_WIDTH, i * ch, p); } // Overlay a dark rectangle to dim the keyboard if (mMiniKeyboardView != null) { mPaint.setColor((int) (mBackgroundDimAmount * 0xFF) << 24); canvas.drawRect(0, 0, width, height, mPaint); } mInvalidatedKey = null; mDrawPending = false; mDirtyRect.setEmpty(); } private void onBufferDrawKey(final Canvas canvas, final Key key) { final Paint paint = mPaint; final Drawable keyBackground = mKeyBackground; final Rect padding = mPadding; final int kbdPaddingLeft = getPaddingLeft(); final int kbdPaddingTop = getPaddingTop(); final int keyDrawX = key.mX + key.mVisualInsetsLeft; final int keyDrawWidth = key.mWidth - key.mVisualInsetsLeft - key.mVisualInsetsRight; final int rowHeight = padding.top + key.mHeight; final boolean isManualTemporaryUpperCase = mKeyboard.isManualTemporaryUpperCase(); canvas.translate(keyDrawX + kbdPaddingLeft, key.mY + kbdPaddingTop); // Draw key background. final int[] drawableState = key.getCurrentDrawableState(); keyBackground.setState(drawableState); final Rect bounds = keyBackground.getBounds(); if (keyDrawWidth != bounds.right || key.mHeight != bounds.bottom) { keyBackground.setBounds(0, 0, keyDrawWidth, key.mHeight); } keyBackground.draw(canvas); // Draw key label. if (key.mLabel != null) { // Switch the character to uppercase if shift is pressed final String label = key.mLabel == null ? null : adjustCase(key.mLabel).toString(); // For characters, use large font. For labels like "Done", use small font. final int labelSize = getLabelSizeAndSetPaint(label, key.mLabelOption, paint); final int labelCharHeight = getLabelCharHeight(labelSize, paint); // Vertical label text alignment. final float baseline; if ((key.mLabelOption & KEY_LABEL_OPTION_ALIGN_BOTTOM) != 0) { baseline = key.mHeight - labelCharHeight * KEY_LABEL_VERTICAL_PADDING_FACTOR; if (DEBUG_SHOW_ALIGN) drawHorizontalLine(canvas, (int)baseline, keyDrawWidth, 0xc0008000, new Paint()); } else { // Align center final float centerY = (key.mHeight + padding.top - padding.bottom) / 2; baseline = centerY + labelCharHeight * KEY_LABEL_VERTICAL_ADJUSTMENT_FACTOR_CENTER; if (DEBUG_SHOW_ALIGN) drawHorizontalLine(canvas, (int)baseline, keyDrawWidth, 0xc0008000, new Paint()); } // Horizontal label text alignment final int positionX; if ((key.mLabelOption & KEY_LABEL_OPTION_ALIGN_LEFT) != 0) { positionX = mKeyLabelHorizontalPadding + padding.left; paint.setTextAlign(Align.LEFT); if (DEBUG_SHOW_ALIGN) drawVerticalLine(canvas, positionX, rowHeight, 0xc0800080, new Paint()); } else if ((key.mLabelOption & KEY_LABEL_OPTION_ALIGN_RIGHT) != 0) { positionX = keyDrawWidth - mKeyLabelHorizontalPadding - padding.right; paint.setTextAlign(Align.RIGHT); if (DEBUG_SHOW_ALIGN) drawVerticalLine(canvas, positionX, rowHeight, 0xc0808000, new Paint()); } else { positionX = (keyDrawWidth + padding.left - padding.right) / 2; paint.setTextAlign(Align.CENTER); if (DEBUG_SHOW_ALIGN) { if (label.length() > 1) drawVerticalLine(canvas, positionX, rowHeight, 0xc0008080, new Paint()); } } if (key.mManualTemporaryUpperCaseHintIcon != null && isManualTemporaryUpperCase) { paint.setColor(mKeyTextColorDisabled); } else { paint.setColor(mKeyTextColor); } if (key.mEnabled) { // Set a drop shadow for the text paint.setShadowLayer(mShadowRadius, 0, 0, mShadowColor); } else { // Make label invisible paint.setColor(Color.TRANSPARENT); } canvas.drawText(label, positionX, baseline, paint); // Turn off drop shadow paint.setShadowLayer(0, 0, 0, 0); } // Draw key icon. final Drawable icon = key.getIcon(); if (key.mLabel == null && icon != null) { final int drawableWidth = icon.getIntrinsicWidth(); final int drawableHeight = icon.getIntrinsicHeight(); final int drawableX; final int drawableY = (key.mHeight + padding.top - padding.bottom - drawableHeight) / 2; if ((key.mLabelOption & KEY_LABEL_OPTION_ALIGN_LEFT) != 0) { drawableX = padding.left + mKeyLabelHorizontalPadding; if (DEBUG_SHOW_ALIGN) drawVerticalLine(canvas, drawableX, rowHeight, 0xc0800080, new Paint()); } else if ((key.mLabelOption & KEY_LABEL_OPTION_ALIGN_RIGHT) != 0) { drawableX = keyDrawWidth - padding.right - mKeyLabelHorizontalPadding - drawableWidth; if (DEBUG_SHOW_ALIGN) drawVerticalLine(canvas, drawableX + drawableWidth, rowHeight, 0xc0808000, new Paint()); } else { // Align center drawableX = (keyDrawWidth + padding.left - padding.right - drawableWidth) / 2; if (DEBUG_SHOW_ALIGN) drawVerticalLine(canvas, drawableX + drawableWidth / 2, rowHeight, 0xc0008080, new Paint()); } drawIcon(canvas, icon, drawableX, drawableY, drawableWidth, drawableHeight); if (DEBUG_SHOW_ALIGN) drawRectangle(canvas, drawableX, drawableY, drawableWidth, drawableHeight, 0x80c00000, new Paint()); } // Draw hint icon. if (key.mHintIcon != null) { final int drawableWidth = keyDrawWidth; final int drawableHeight = key.mHeight; final int drawableX = 0; final int drawableY = HINT_ICON_VERTICAL_ADJUSTMENT_PIXEL; Drawable hintIcon = (isManualTemporaryUpperCase && key.mManualTemporaryUpperCaseHintIcon != null) ? key.mManualTemporaryUpperCaseHintIcon : key.mHintIcon; drawIcon(canvas, hintIcon, drawableX, drawableY, drawableWidth, drawableHeight); if (DEBUG_SHOW_ALIGN) drawRectangle(canvas, drawableX, drawableY, drawableWidth, drawableHeight, 0x80c0c000, new Paint()); } canvas.translate(-keyDrawX - kbdPaddingLeft, -key.mY - kbdPaddingTop); } public int getLabelSizeAndSetPaint(CharSequence label, int keyLabelOption, Paint paint) { // For characters, use large font. For labels like "Done", use small font. final int labelSize; final Typeface labelStyle; if (label.length() > 1) { labelSize = mLabelTextSize; if ((keyLabelOption & KEY_LABEL_OPTION_FONT_NORMAL) != 0) { labelStyle = Typeface.DEFAULT; } else { labelStyle = Typeface.DEFAULT_BOLD; } } else { labelSize = mKeyLetterSize; labelStyle = mKeyLetterStyle; } paint.setTextSize(labelSize); paint.setTypeface(labelStyle); return labelSize; } private int getLabelCharHeight(int labelSize, Paint paint) { Integer labelHeightValue = mTextHeightCache.get(labelSize); final int labelCharHeight; if (labelHeightValue != null) { labelCharHeight = labelHeightValue; } else { Rect textBounds = new Rect(); paint.getTextBounds(KEY_LABEL_REFERENCE_CHAR, 0, 1, textBounds); labelCharHeight = textBounds.height(); mTextHeightCache.put(labelSize, labelCharHeight); } return labelCharHeight; } private static void drawIcon(Canvas canvas, Drawable icon, int x, int y, int width, int height) { canvas.translate(x, y); icon.setBounds(0, 0, width, height); icon.draw(canvas); canvas.translate(-x, -y); } private static void drawHorizontalLine(Canvas canvas, int y, int w, int color, Paint paint) { paint.setStyle(Paint.Style.STROKE); paint.setStrokeWidth(1.0f); paint.setColor(color); canvas.drawLine(0, y, w, y, paint); } private static void drawVerticalLine(Canvas canvas, int x, int h, int color, Paint paint) { paint.setStyle(Paint.Style.STROKE); paint.setStrokeWidth(1.0f); paint.setColor(color); canvas.drawLine(x, 0, x, h, paint); } private static void drawRectangle(Canvas canvas, int x, int y, int w, int h, int color, Paint paint) { paint.setStyle(Paint.Style.STROKE); paint.setStrokeWidth(1.0f); paint.setColor(color); canvas.translate(x, y); canvas.drawRect(0, 0, w, h, paint); canvas.translate(-x, -y); } public void setForeground(boolean foreground) { mInForeground = foreground; } // TODO: clean up this method. private void dismissAllKeyPreviews() { for (PointerTracker tracker : mPointerTrackers) { tracker.setReleasedKeyGraphics(); dismissKeyPreview(tracker); } } @Override public void showKeyPreview(int keyIndex, PointerTracker tracker) { if (mShowKeyPreview) { mHandler.showKeyPreview(mDelayBeforePreview, keyIndex, tracker); } else if (mKeyboard.needSpacebarPreview(keyIndex)) { // Show key preview (in this case, slide language switcher) without any delay. showKey(keyIndex, tracker); } } @Override public void dismissKeyPreview(PointerTracker tracker) { if (mShowKeyPreview) { mHandler.cancelShowKeyPreview(tracker); mHandler.dismissKeyPreview(mDelayAfterPreview, tracker); } else if (mKeyboard.needSpacebarPreview(KeyDetector.NOT_A_KEY)) { // Dismiss key preview (in this case, slide language switcher) without any delay. mPreviewText.setVisibility(View.INVISIBLE); } } private void addKeyPreview(TextView keyPreview) { ViewGroup placer = mPreviewPlacer; if (placer == null) { final FrameLayout screenContent = (FrameLayout) getRootView().findViewById( android.R.id.content); if (android.os.Build.VERSION.SDK_INT >= /* HONEYCOMB */11) { placer = screenContent; } else { // Insert LinearLayout to be able to setMargin because pre-Honeycomb FrameLayout // could not handle setMargin properly. placer = new LinearLayout(getContext()); screenContent.addView(placer); } mPreviewPlacer = placer; } if (placer instanceof FrameLayout) { placer.addView(keyPreview, new FrameLayout.LayoutParams(0, 0)); } else { placer.addView(keyPreview, new LinearLayout.LayoutParams(0, 0)); } } // TODO: Introduce minimum duration for displaying key previews // TODO: Display up to two key previews when the user presses two keys at the same time private void showKey(final int keyIndex, PointerTracker tracker) { // If the key preview has no parent view yet, add it to the ViewGroup which can place // key preview absolutely in SoftInputWindow. if (mPreviewText.getParent() == null) { addKeyPreview(mPreviewText); } final Key key = tracker.getKey(keyIndex); // If keyIndex is invalid or IME is already closed, we must not show key preview. // Trying to show key preview while root window is closed causes // WindowManager.BadTokenException. if (key == null || !mInForeground) return; final int keyDrawX = key.mX + key.mVisualInsetsLeft; final int keyDrawWidth = key.mWidth - key.mVisualInsetsLeft - key.mVisualInsetsRight; // What we show as preview should match what we show on key top in onBufferDraw(). if (key.mLabel != null) { // TODO Should take care of temporaryShiftLabel here. mPreviewText.setCompoundDrawables(null, null, null, null); mPreviewText.setText(adjustCase(tracker.getPreviewText(key))); if (key.mLabel.length() > 1) { mPreviewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mKeyLetterSize); mPreviewText.setTypeface(Typeface.DEFAULT_BOLD); } else { mPreviewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mPreviewTextSizeLarge); mPreviewText.setTypeface(mKeyLetterStyle); } } else { final Drawable previewIcon = key.getPreviewIcon(); mPreviewText.setCompoundDrawables(null, null, null, previewIcon != null ? previewIcon : key.getIcon()); mPreviewText.setText(null); } // Set the preview background state mPreviewText.getBackground().setState( key.mPopupCharacters != null ? LONG_PRESSABLE_STATE_SET : EMPTY_STATE_SET); mPreviewText.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)); int previewWidth = Math.max(mPreviewText.getMeasuredWidth(), keyDrawWidth + mPreviewText.getPaddingLeft() + mPreviewText.getPaddingRight()); final int previewHeight = mPreviewHeight; final ViewGroup.LayoutParams lp = mPreviewText.getLayoutParams(); lp.width = previewWidth; lp.height = previewHeight; int previewX = keyDrawX - (previewWidth - keyDrawWidth) / 2; int previewY = key.mY - previewHeight + mPreviewOffset; mHandler.cancelAllDismissKeyPreviews(); getLocationInWindow(mOffsetInWindow); previewX += mOffsetInWindow[0]; previewY += mOffsetInWindow[1]; // Place the key preview. // TODO: Adjust position of key previews which touch screen edges if (lp instanceof ViewGroup.MarginLayoutParams) { ViewGroup.MarginLayoutParams mlp = (ViewGroup.MarginLayoutParams)lp; mlp.setMargins(previewX, previewY, 0, 0); } // Record key preview position to display mini-keyboard later at the same position mKeyPreviewDisplayedY = previewY; mPreviewText.setVisibility(VISIBLE); } /** * Requests a redraw of the entire keyboard. Calling {@link #invalidate} is not sufficient * because the keyboard renders the keys to an off-screen buffer and an invalidate() only * draws the cached buffer. * @see #invalidateKey(Key) */ public void invalidateAllKeys() { mDirtyRect.union(0, 0, getWidth(), getHeight()); mDrawPending = true; invalidate(); } /** * Invalidates a key so that it will be redrawn on the next repaint. Use this method if only * one key is changing it's content. Any changes that affect the position or size of the key * may not be honored. * @param key key in the attached {@link Keyboard}. * @see #invalidateAllKeys */ @Override public void invalidateKey(Key key) { if (key == null) return; mInvalidatedKey = key; mInvalidatedKeyRect.set(0, 0, key.mWidth, key.mHeight); mInvalidatedKeyRect.offset(key.mX + getPaddingLeft(), key.mY + getPaddingTop()); mDirtyRect.union(mInvalidatedKeyRect); onBufferDraw(); invalidate(mInvalidatedKeyRect); } private boolean openMiniKeyboardIfRequired(int keyIndex, PointerTracker tracker) { // Check if we have a popup layout specified first. if (mPopupLayout == 0) { return false; } Key parentKey = tracker.getKey(keyIndex); if (parentKey == null) return false; boolean result = onLongPress(parentKey, tracker); if (result) { dismissAllKeyPreviews(); mMiniKeyboardTrackerId = tracker.mPointerId; tracker.onLongPressed(mPointerQueue); } return result; } private void onLongPressShiftKey(PointerTracker tracker) { tracker.onLongPressed(mPointerQueue); mKeyboardActionListener.onCodeInput(Keyboard.CODE_CAPSLOCK, null, 0, 0); } 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 mPointerQueueueue. mKeyboardActionListener.onCodeInput(Keyboard.CODE_CAPSLOCK, null, 0, 0); } private View inflateMiniKeyboardContainer(Key parentKey) { final View container = LayoutInflater.from(getContext()).inflate(mPopupLayout, null); if (container == null) throw new NullPointerException(); final KeyboardView miniKeyboardView = (KeyboardView)container.findViewById(R.id.KeyboardView); miniKeyboardView.setOnKeyboardActionListener(new KeyboardActionListener() { @Override public void onCodeInput(int primaryCode, int[] keyCodes, int x, int y) { mKeyboardActionListener.onCodeInput(primaryCode, keyCodes, x, y); dismissMiniKeyboard(); } @Override public void onTextInput(CharSequence text) { mKeyboardActionListener.onTextInput(text); dismissMiniKeyboard(); } @Override public void onCancelInput() { mKeyboardActionListener.onCancelInput(); dismissMiniKeyboard(); } @Override public void onSwipeDown() { // Nothing to do. } @Override public void onPress(int primaryCode, boolean withSliding) { mKeyboardActionListener.onPress(primaryCode, withSliding); } @Override public void onRelease(int primaryCode, boolean withSliding) { mKeyboardActionListener.onRelease(primaryCode, withSliding); } }); // Override default ProximityKeyDetector. miniKeyboardView.mKeyDetector = new MiniKeyboardKeyDetector(mMiniKeyboardSlideAllowance); // Remove gesture detector on mini-keyboard miniKeyboardView.mGestureDetector = null; final Keyboard keyboard = new MiniKeyboardBuilder(this, mKeyboard.getPopupKeyboardResId(), parentKey).build(); miniKeyboardView.setKeyboard(keyboard); container.measure(MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.AT_MOST), MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.AT_MOST)); return container; } private static boolean isOneRowKeys(List keys) { if (keys.size() == 0) return false; final int edgeFlags = keys.get(0).mEdgeFlags; // HACK: The first key of mini keyboard which was inflated from xml and has multiple rows, // does not have both top and bottom edge flags on at the same time. On the other hand, // the first key of mini keyboard that was created with popupCharacters must have both top // and bottom edge flags on. // When you want to use one row mini-keyboard from xml file, make sure that the row has // both top and bottom edge flags set. return (edgeFlags & Keyboard.EDGE_TOP) != 0 && (edgeFlags & Keyboard.EDGE_BOTTOM) != 0; } /** * Called when a key is long pressed. By default this will open any mini keyboard associated * with this key through the attributes popupLayout and popupCharacters. * @param parentKey the key that was long pressed * @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) { if (parentKey.mPopupCharacters == null) return false; View container = mMiniKeyboardCache.get(parentKey); if (container == null) { container = inflateMiniKeyboardContainer(parentKey); mMiniKeyboardCache.put(parentKey, container); } mMiniKeyboardView = (KeyboardView)container.findViewById(R.id.KeyboardView); final MiniKeyboard miniKeyboard = (MiniKeyboard)mMiniKeyboardView.getKeyboard(); if (mWindowOffset == null) { mWindowOffset = new int[2]; getLocationInWindow(mWindowOffset); } final int pointX = (mConfigShowMiniKeyboardAtTouchedPoint) ? tracker.getLastX() : parentKey.mX + parentKey.mWidth / 2; final int miniKeyboardX = pointX - miniKeyboard.getDefaultCoordX() - container.getPaddingLeft() + getPaddingLeft() + mWindowOffset[0]; final int miniKeyboardY = parentKey.mY - mKeyboard.getVerticalGap() - (container.getMeasuredHeight() - container.getPaddingBottom()) + getPaddingTop() + mWindowOffset[1]; final int x = miniKeyboardX; final int y = mShowKeyPreview && isOneRowKeys(miniKeyboard.getKeys()) ? mKeyPreviewDisplayedY : miniKeyboardY; mMiniKeyboardOriginX = x + container.getPaddingLeft() - mWindowOffset[0]; mMiniKeyboardOriginY = y + container.getPaddingTop() - mWindowOffset[1]; if (miniKeyboard.setShifted( mKeyboard == null ? false : mKeyboard.isShiftedOrShiftLocked())) { mMiniKeyboardView.invalidateAllKeys(); } // Mini keyboard needs no pop-up key preview displayed. mMiniKeyboardView.setKeyPreviewEnabled(false); mMiniKeyboardWindow.setContentView(container); mMiniKeyboardWindow.setWidth(container.getMeasuredWidth()); mMiniKeyboardWindow.setHeight(container.getMeasuredHeight()); mMiniKeyboardWindow.showAtLocation(this, Gravity.NO_GRAVITY, x, y); // Inject down event on the key to mini keyboard. final long eventTime = SystemClock.uptimeMillis(); mMiniKeyboardDisplayedTime = eventTime; final MotionEvent downEvent = generateMiniKeyboardMotionEvent(MotionEvent.ACTION_DOWN, pointX, parentKey.mY + parentKey.mHeight / 2, eventTime); mMiniKeyboardView.onTouchEvent(downEvent); downEvent.recycle(); invalidateAllKeys(); return true; } private MotionEvent generateMiniKeyboardMotionEvent(int action, int x, int y, long eventTime) { return MotionEvent.obtain(mMiniKeyboardDisplayedTime, eventTime, action, x - mMiniKeyboardOriginX, y - mMiniKeyboardOriginY, 0); } private PointerTracker getPointerTracker(final int id) { final ArrayList pointers = mPointerTrackers; final KeyboardActionListener listener = mKeyboardActionListener; // Create pointer trackers until we can get 'id+1'-th tracker, if needed. for (int i = pointers.size(); i <= id; i++) { final PointerTracker tracker = new PointerTracker(i, this, mHandler, mKeyDetector, this); if (mKeyboard != null) tracker.setKeyboard(mKeyboard, mKeyHysteresisDistance); if (listener != null) tracker.setOnKeyboardActionListener(listener); pointers.add(tracker); } return pointers.get(id); } public boolean isInSlidingKeyInput() { if (mMiniKeyboardView != null) { return mMiniKeyboardView.isInSlidingKeyInput(); } else { return mPointerQueue.isInSlidingKeyInput(); } } public int getPointerCount() { return mOldPointerCount; } @Override public boolean onTouchEvent(MotionEvent me) { 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 ((!mHasDistinctMultitouch || mIsAccessibilityEnabled) && pointerCount > 1 && oldPointerCount > 1) { return true; } // Track the last few movements to look for spurious swipes. mSwipeTracker.addMovement(me); // Gesture detector must be enabled only when mini-keyboard is not on the screen and // accessibility is not enabled. // TODO: Reconcile gesture detection and accessibility features. if (mMiniKeyboardView == null && !mIsAccessibilityEnabled && mGestureDetector != null && mGestureDetector.onTouchEvent(me)) { dismissAllKeyPreviews(); mHandler.cancelKeyTimers(); return true; } final long eventTime = me.getEventTime(); final int index = me.getActionIndex(); final int id = me.getPointerId(index); final int x = (int)me.getX(index); final int y = (int)me.getY(index); // Needs to be called after the gesture detector gets a turn, as it may have // displayed the mini keyboard if (mMiniKeyboardView != null) { final int miniKeyboardPointerIndex = me.findPointerIndex(mMiniKeyboardTrackerId); if (miniKeyboardPointerIndex >= 0 && miniKeyboardPointerIndex < pointerCount) { final int miniKeyboardX = (int)me.getX(miniKeyboardPointerIndex); final int miniKeyboardY = (int)me.getY(miniKeyboardPointerIndex); MotionEvent translated = generateMiniKeyboardMotionEvent(action, miniKeyboardX, miniKeyboardY, eventTime); mMiniKeyboardView.onTouchEvent(translated); translated.recycle(); } return true; } if (mHandler.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()) { mHandler.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 (!mHasDistinctMultitouch || mIsAccessibilityEnabled) { // 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, null); if (action == MotionEvent.ACTION_UP) tracker.onUpEvent(x, y, eventTime, null); } } 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, null); } else if (pointerCount == 1 && oldPointerCount == 1) { tracker.onTouchEvent(action, x, y, eventTime, null); } else { Log.w(TAG, "Unknown touch panel behavior: pointer count is " + pointerCount + " (old " + oldPointerCount + ")"); } return true; } final PointerTrackerQueue queue = mPointerQueue; if (action == MotionEvent.ACTION_MOVE) { for (int i = 0; i < pointerCount; i++) { final PointerTracker tracker = getPointerTracker(me.getPointerId(i)); tracker.onMoveEvent((int)me.getX(i), (int)me.getY(i), eventTime, queue); } } else { final PointerTracker tracker = getPointerTracker(id); switch (action) { case MotionEvent.ACTION_DOWN: case MotionEvent.ACTION_POINTER_DOWN: tracker.onDownEvent(x, y, eventTime, queue); break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_POINTER_UP: tracker.onUpEvent(x, y, eventTime, queue); break; case MotionEvent.ACTION_CANCEL: tracker.onCancelEvent(x, y, eventTime, queue); break; } } return true; } protected void onSwipeDown() { mKeyboardActionListener.onSwipeDown(); } public void closing() { mPreviewText.setVisibility(View.GONE); mHandler.cancelAllMessages(); dismissMiniKeyboard(); mDirtyRect.union(0, 0, getWidth(), getHeight()); mMiniKeyboardCache.clear(); requestLayout(); } public void purgeKeyboardAndClosing() { mKeyboard = null; closing(); } @Override public void onDetachedFromWindow() { super.onDetachedFromWindow(); closing(); } private void dismissMiniKeyboard() { if (mMiniKeyboardWindow.isShowing()) { mMiniKeyboardWindow.dismiss(); mMiniKeyboardView = null; mMiniKeyboardOriginX = 0; mMiniKeyboardOriginY = 0; invalidateAllKeys(); } } public boolean handleBack() { if (mMiniKeyboardWindow.isShowing()) { dismissMiniKeyboard(); return true; } return false; } }