/* * 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.latin; import com.android.inputmethod.latin.BaseKeyboard.Key; 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.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.LayoutParams; import android.view.WindowManager; import android.widget.PopupWindow; import android.widget.TextView; import java.util.ArrayList; import java.util.HashMap; import java.util.LinkedList; import java.util.List; import java.util.WeakHashMap; /** * A view that renders a virtual {@link LatinKeyboard}. It handles rendering of keys and * detecting key presses and touch movements. * * TODO: References to LatinKeyboard in this class should be replaced with ones to its base class. * * @attr ref R.styleable#BaseKeyboardView_keyBackground * @attr ref R.styleable#BaseKeyboardView_keyPreviewLayout * @attr ref R.styleable#BaseKeyboardView_keyPreviewOffset * @attr ref R.styleable#BaseKeyboardView_labelTextSize * @attr ref R.styleable#BaseKeyboardView_keyTextSize * @attr ref R.styleable#BaseKeyboardView_keyTextColor * @attr ref R.styleable#BaseKeyboardView_verticalCorrection * @attr ref R.styleable#BaseKeyboardView_popupLayout */ public class BaseKeyboardView extends View implements PointerTracker.UIProxy { private static final String TAG = "BaseKeyboardView"; private static final boolean DEBUG = false; private static final boolean DEBUG_KEYBOARD_GRID = false; public static final int NOT_A_TOUCH_COORDINATE = -1; public interface OnKeyboardActionListener { /** * Called when the user presses a key. This is sent before the * {@link #onKey} is called. For keys that repeat, this is only * called once. * * @param primaryCode * the unicode of the key being pressed. If the touch is * not on a valid key, the value will be zero. */ void onPress(int primaryCode); /** * Called when the user releases a key. This is sent after the * {@link #onKey} is called. For keys that repeat, this is only * called once. * * @param primaryCode * the code of the key that was released */ void onRelease(int primaryCode); /** * Send a key press to the listener. * * @param primaryCode * this is the key that was pressed * @param keyCodes * the codes for all the possible alternative keys with * the primary code being the first. If the primary key * code is a single character such as an alphabet or * number or symbol, the alternatives will include other * characters that may be on the same key or adjacent * keys. These codes are useful to correct for * accidental presses of a key adjacent to the intended * key. * @param x * x-coordinate pixel of touched event. If onKey is not called by onTouchEvent, * the value should be NOT_A_TOUCH_COORDINATE. * @param y * y-coordinate pixel of touched event. If onKey is not called by onTouchEvent, * the value should be NOT_A_TOUCH_COORDINATE. */ void onKey(int primaryCode, int[] keyCodes, int x, int y); /** * Sends a sequence of characters to the listener. * * @param text * the sequence of characters to be displayed. */ void onText(CharSequence text); /** * Called when user released a finger outside any key. */ void onCancel(); /** * Called when the user quickly moves the finger from right to * left. */ void swipeLeft(); /** * Called when the user quickly moves the finger from left to * right. */ void swipeRight(); /** * Called when the user quickly moves the finger from up to down. */ void swipeDown(); /** * Called when the user quickly moves the finger from down to up. */ void swipeUp(); } // Timing constants private final int mKeyRepeatInterval; // Miscellaneous constants /* package */ static final int NOT_A_KEY = -1; 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 mKeyTextSize; private int mKeyTextColor; private Typeface mKeyTextStyle = Typeface.DEFAULT; private int mLabelTextSize; private int mSymbolColorScheme = 0; 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 BaseKeyboard mKeyboard; private Key[] mKeys; // Key preview popup private boolean mInForeground; private TextView mPreviewText; private PopupWindow mPreviewPopup; private int mPreviewTextSizeLarge; private int[] mOffsetInWindow; private int mOldPreviewKeyIndex = NOT_A_KEY; private boolean mShowPreview = true; private boolean mShowTouchPoints = true; private int mPopupPreviewOffsetX; private int mPopupPreviewOffsetY; private int mWindowY; private int mPopupPreviewDisplayedY; private final int mDelayBeforePreview; private final int mDelayAfterPreview; // Popup mini keyboard private PopupWindow mMiniKeyboardPopup; private BaseKeyboardView mMiniKeyboard; private View mMiniKeyboardParent; private final WeakHashMap mMiniKeyboardCache = new WeakHashMap(); private int mMiniKeyboardOriginX; private int mMiniKeyboardOriginY; private long mMiniKeyboardPopupTime; private int[] mWindowOffset; private final float mMiniKeyboardSlideAllowance; private int mMiniKeyboardTrackerId; /** Listener for {@link OnKeyboardActionListener}. */ private OnKeyboardActionListener mKeyboardActionListener; private final ArrayList mPointerTrackers = new ArrayList(); // TODO: Let the PointerTracker class manage this pointer queue private final PointerQueue mPointerQueue = new PointerQueue(); private final boolean mHasDistinctMultitouch; private int mOldPointerCount = 1; protected KeyDetector mKeyDetector = new ProximityKeyDetector(); // 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; /** The dirty region in the keyboard bitmap */ private final Rect mDirtyRect = new Rect(); /** The keyboard bitmap for faster updates */ private Bitmap mBuffer; /** Notes if the keyboard just changed, so that we could possibly reallocate the mBuffer. */ private boolean mKeyboardChanged; private Key mInvalidatedKey; /** The canvas for the above mutable keyboard bitmap */ private Canvas mCanvas; private final Paint mPaint; private final Rect mPadding; private final Rect mClipRegion = new Rect(0, 0, 0, 0); // 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(); // This map caches key label text width in pixel as value and key label text size as map key. private final HashMap mTextWidthCache = 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 = 0.55f; private final float KEY_LABEL_VERTICAL_PADDING_FACTOR = 1.60f; private final float KEY_LABEL_HORIZONTAL_PADDING_FACTOR = 0.80f; 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 UIHandler mHandler = new UIHandler(); class UIHandler extends Handler { private static final int MSG_POPUP_PREVIEW = 1; private static final int MSG_DISMISS_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_POPUP_PREVIEW: showKey(msg.arg1, (PointerTracker)msg.obj); break; case MSG_DISMISS_PREVIEW: mPreviewPopup.dismiss(); break; case MSG_REPEAT_KEY: { final PointerTracker tracker = (PointerTracker)msg.obj; tracker.repeatKey(msg.arg1); startKeyRepeatTimer(mKeyRepeatInterval, msg.arg1, tracker); break; } case MSG_LONGPRESS_KEY: { final PointerTracker tracker = (PointerTracker)msg.obj; openPopupIfRequired(msg.arg1, tracker); break; } case MSG_LONGPRESS_SHIFT_KEY: { final PointerTracker tracker = (PointerTracker)msg.obj; onLongPressShiftKey(tracker); break; } } } public void popupPreview(long delay, int keyIndex, PointerTracker tracker) { removeMessages(MSG_POPUP_PREVIEW); if (mPreviewPopup.isShowing() && mPreviewText.getVisibility() == VISIBLE) { // Show right away, if it's already visible and finger is moving around showKey(keyIndex, tracker); } else { sendMessageDelayed(obtainMessage(MSG_POPUP_PREVIEW, keyIndex, 0, tracker), delay); } } public void cancelPopupPreview() { removeMessages(MSG_POPUP_PREVIEW); } public void dismissPreview(long delay) { if (mPreviewPopup.isShowing()) { sendMessageDelayed(obtainMessage(MSG_DISMISS_PREVIEW), delay); } } public void cancelDismissPreview() { removeMessages(MSG_DISMISS_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(); 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(); cancelPopupPreview(); cancelDismissPreview(); } }; static class PointerQueue { private LinkedList mQueue = new LinkedList(); public void add(PointerTracker tracker) { mQueue.add(tracker); } public int lastIndexOf(PointerTracker tracker) { LinkedList queue = mQueue; for (int index = queue.size() - 1; index >= 0; index--) { PointerTracker t = queue.get(index); if (t == tracker) return index; } return -1; } public void releaseAllPointersOlderThan(PointerTracker tracker, long eventTime) { LinkedList queue = mQueue; int oldestPos = 0; for (PointerTracker t = queue.get(oldestPos); t != tracker; t = queue.get(oldestPos)) { if (t.isModifier()) { oldestPos++; } else { t.onUpEvent(t.getLastX(), t.getLastY(), eventTime); t.setAlreadyProcessed(); queue.remove(oldestPos); } } } public void releaseAllPointersExcept(PointerTracker tracker, long eventTime) { for (PointerTracker t : mQueue) { if (t == tracker) continue; t.onUpEvent(t.getLastX(), t.getLastY(), eventTime); t.setAlreadyProcessed(); } mQueue.clear(); if (tracker != null) mQueue.add(tracker); } public void remove(PointerTracker tracker) { mQueue.remove(tracker); } } public BaseKeyboardView(Context context, AttributeSet attrs) { this(context, attrs, R.attr.keyboardViewStyle); } public BaseKeyboardView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); TypedArray a = context.obtainStyledAttributes( attrs, R.styleable.BaseKeyboardView, defStyle, R.style.BaseKeyboardView); LayoutInflater inflate = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 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.BaseKeyboardView_keyBackground: mKeyBackground = a.getDrawable(attr); break; case R.styleable.BaseKeyboardView_keyHysteresisDistance: mKeyHysteresisDistance = a.getDimensionPixelOffset(attr, 0); break; case R.styleable.BaseKeyboardView_verticalCorrection: mVerticalCorrection = a.getDimensionPixelOffset(attr, 0); break; case R.styleable.BaseKeyboardView_keyPreviewLayout: previewLayout = a.getResourceId(attr, 0); break; case R.styleable.BaseKeyboardView_keyPreviewOffset: mPreviewOffset = a.getDimensionPixelOffset(attr, 0); break; case R.styleable.BaseKeyboardView_keyPreviewHeight: mPreviewHeight = a.getDimensionPixelSize(attr, 80); break; case R.styleable.BaseKeyboardView_keyTextSize: mKeyTextSize = a.getDimensionPixelSize(attr, 18); break; case R.styleable.BaseKeyboardView_keyTextColor: mKeyTextColor = a.getColor(attr, 0xFF000000); break; case R.styleable.BaseKeyboardView_labelTextSize: mLabelTextSize = a.getDimensionPixelSize(attr, 14); break; case R.styleable.BaseKeyboardView_popupLayout: mPopupLayout = a.getResourceId(attr, 0); break; case R.styleable.BaseKeyboardView_shadowColor: mShadowColor = a.getColor(attr, 0); break; case R.styleable.BaseKeyboardView_shadowRadius: mShadowRadius = a.getFloat(attr, 0f); break; // TODO: Use Theme (android.R.styleable.Theme_backgroundDimAmount) case R.styleable.BaseKeyboardView_backgroundDimAmount: mBackgroundDimAmount = a.getFloat(attr, 0.5f); break; //case android.R.styleable. case R.styleable.BaseKeyboardView_keyTextStyle: int textStyle = a.getInt(attr, 0); switch (textStyle) { case 0: mKeyTextStyle = Typeface.DEFAULT; break; case 1: mKeyTextStyle = Typeface.DEFAULT_BOLD; break; default: mKeyTextStyle = Typeface.defaultFromStyle(textStyle); break; } break; case R.styleable.BaseKeyboardView_symbolColorScheme: mSymbolColorScheme = a.getInt(attr, 0); break; } } final Resources res = getResources(); mPreviewPopup = new PopupWindow(context); if (previewLayout != 0) { mPreviewText = (TextView) inflate.inflate(previewLayout, null); mPreviewTextSizeLarge = (int) res.getDimension(R.dimen.key_preview_text_size_large); mPreviewPopup.setContentView(mPreviewText); mPreviewPopup.setBackgroundDrawable(null); } else { mShowPreview = false; } mPreviewPopup.setTouchable(false); mPreviewPopup.setAnimationStyle(R.style.KeyPreviewAnimation); mDelayBeforePreview = res.getInteger(R.integer.config_delay_before_preview); mDelayAfterPreview = res.getInteger(R.integer.config_delay_after_preview); mMiniKeyboardParent = this; mMiniKeyboardPopup = new PopupWindow(context); mMiniKeyboardPopup.setBackgroundDrawable(null); mMiniKeyboardPopup.setAnimationStyle(R.style.MiniKeyboardAnimation); 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); GestureDetector.SimpleOnGestureListener listener = new GestureDetector.SimpleOnGestureListener() { @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 deltaX = me2.getX() - me1.getX(); float deltaY = me2.getY() - me1.getY(); int travelX = getWidth() / 2; // Half the keyboard width int travelY = getHeight() / 2; // Half the keyboard height mSwipeTracker.computeCurrentVelocity(1000); final float endingVelocityX = mSwipeTracker.getXVelocity(); final float endingVelocityY = mSwipeTracker.getYVelocity(); if (velocityX > mSwipeThreshold && absY < absX && deltaX > travelX) { if (mDisambiguateSwipe && endingVelocityX >= velocityX / 4) { swipeRight(); return true; } } else if (velocityX < -mSwipeThreshold && absY < absX && deltaX < -travelX) { if (mDisambiguateSwipe && endingVelocityX <= velocityX / 4) { swipeLeft(); return true; } } else if (velocityY < -mSwipeThreshold && absX < absY && deltaY < -travelY) { if (mDisambiguateSwipe && endingVelocityY <= velocityY / 4) { swipeUp(); return true; } } else if (velocityY > mSwipeThreshold && absX < absY / 2 && deltaY > travelY) { if (mDisambiguateSwipe && endingVelocityY >= velocityY / 4) { swipeDown(); return true; } } return false; } }; 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(OnKeyboardActionListener listener) { mKeyboardActionListener = listener; for (PointerTracker tracker : mPointerTrackers) { tracker.setOnKeyboardActionListener(listener); } } /** * Returns the {@link OnKeyboardActionListener} object. * @return the listener attached to this keyboard */ protected OnKeyboardActionListener 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 BaseKeyboard * @see #getKeyboard() * @param keyboard the keyboard to display in this view */ protected void setKeyboard(BaseKeyboard keyboard) { if (mKeyboard != null) { dismissKeyPreview(); } // Remove any pending messages, except dismissing preview mHandler.cancelKeyTimers(); mHandler.cancelPopupPreview(); mKeyboard = keyboard; LatinImeLogger.onSetKeyboard(keyboard); mKeys = mKeyDetector.setKeyboard(keyboard, -getPaddingLeft(), -getPaddingTop() + mVerticalCorrection); for (PointerTracker tracker : mPointerTrackers) { tracker.setKeyboard(keyboard, mKeys, mKeyHysteresisDistance); } requestLayout(); // Hint to reallocate the buffer if the size changed mKeyboardChanged = true; invalidateAllKeys(); computeProximityThreshold(keyboard, mKeys); mMiniKeyboardCache.clear(); } /** * Returns the current keyboard being displayed by this view. * @return the currently attached keyboard * @see #setKeyboard(BaseKeyboard) */ protected BaseKeyboard getKeyboard() { return mKeyboard; } /** * Return whether the device has distinct multi-touch panel. * @return true if the device has distinct multi-touch panel. */ public boolean hasDistinctMultitouch() { return mHasDistinctMultitouch; } /** * Enables or disables the key feedback popup. This is a popup 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 popup * @see #isPreviewEnabled() */ public void setPreviewEnabled(boolean previewEnabled) { mShowPreview = previewEnabled; } /** * Returns the enabled state of the key feedback popup. * @return whether or not the key feedback popup is enabled * @see #setPreviewEnabled(boolean) */ public boolean isPreviewEnabled() { return mShowPreview; } public int getSymbolColorScheme() { return mSymbolColorScheme; } public void setPopupParent(View v) { mMiniKeyboardParent = v; } public void setPopupOffset(int x, int y) { mPopupPreviewOffsetX = x; mPopupPreviewOffsetY = y; mPreviewPopup.dismiss(); } /** * When enabled, calls to {@link OnKeyboardActionListener#onKey} 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))) { label = 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()); } } /** * Compute the most common key width and use it as proximity key detection threshold. * @param keyboard * @param keys */ private void computeProximityThreshold(BaseKeyboard keyboard, Key[] keys) { if (keyboard == null || keys == null || keys.length == 0) return; final HashMap histogram = new HashMap(); int maxCount = 0; int mostCommonWidth = 0; for (Key key : keys) { final Integer width = key.width + key.gap; Integer count = histogram.get(width); if (count == null) count = 0; histogram.put(width, ++count); if (count > maxCount) { maxCount = count; mostCommonWidth = width; } } mKeyDetector.setProximityThreshold(mostCommonWidth); } @Override public void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); // Release the buffer, if any and it will be reallocated on the next draw mBuffer = null; } @Override public void onDraw(Canvas canvas) { super.onDraw(canvas); if (mDrawPending || mBuffer == null || mKeyboardChanged) { onBufferDraw(); } canvas.drawBitmap(mBuffer, 0, 0, null); } private void onBufferDraw() { if (mBuffer == null || mKeyboardChanged) { if (mBuffer == null || mKeyboardChanged && (mBuffer.getWidth() != getWidth() || mBuffer.getHeight() != getHeight())) { // Make sure our bitmap is at least 1x1 final int width = Math.max(1, getWidth()); final int height = Math.max(1, getHeight()); mBuffer = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); mCanvas = new Canvas(mBuffer); } invalidateAllKeys(); mKeyboardChanged = false; } final Canvas canvas = mCanvas; canvas.clipRect(mDirtyRect, Op.REPLACE); if (mKeyboard == null) return; final Paint paint = mPaint; final Drawable keyBackground = mKeyBackground; final Rect clipRegion = mClipRegion; final Rect padding = mPadding; final int kbdPaddingLeft = getPaddingLeft(); final int kbdPaddingTop = getPaddingTop(); final Key[] keys = mKeys; final Key invalidKey = mInvalidatedKey; final boolean isManualTemporaryUpperCase = (mKeyboard instanceof LatinKeyboard && ((LatinKeyboard)mKeyboard).isManualTemporaryUpperCase()); paint.setColor(mKeyTextColor); boolean drawSingleKey = false; if (invalidKey != null && canvas.getClipBounds(clipRegion)) { // TODO we should use Rect.inset and Rect.contains here. // Is clipRegion completely contained within the invalidated key? if (invalidKey.x + kbdPaddingLeft - 1 <= clipRegion.left && invalidKey.y + kbdPaddingTop - 1 <= clipRegion.top && invalidKey.x + invalidKey.width + kbdPaddingLeft + 1 >= clipRegion.right && invalidKey.y + invalidKey.height + kbdPaddingTop + 1 >= clipRegion.bottom) { drawSingleKey = true; } } canvas.drawColor(0x00000000, PorterDuff.Mode.CLEAR); final int keyCount = keys.length; for (int i = 0; i < keyCount; i++) { final Key key = keys[i]; if (drawSingleKey && invalidKey != key) { continue; } int[] drawableState = key.getCurrentDrawableState(); keyBackground.setState(drawableState); // Switch the character to uppercase if shift is pressed String label = key.label == null? null : adjustCase(key.label).toString(); final Rect bounds = keyBackground.getBounds(); if (key.width != bounds.right || key.height != bounds.bottom) { keyBackground.setBounds(0, 0, key.width, key.height); } canvas.translate(key.x + kbdPaddingLeft, key.y + kbdPaddingTop); keyBackground.draw(canvas); boolean drawHintIcon = true; // Draw key label if (label != null) { // For characters, use large font. For labels like "Done", use small font. final int labelSize; if (label.length() > 1 && key.codes.length < 2) { labelSize = mLabelTextSize; if ((key.labelOption & KEY_LABEL_OPTION_FONT_NORMAL) != 0) { paint.setTypeface(Typeface.DEFAULT); } else { paint.setTypeface(Typeface.DEFAULT_BOLD); } } else { labelSize = mKeyTextSize; paint.setTypeface(mKeyTextStyle); } paint.setTextSize(labelSize); Integer labelHeightValue = mTextHeightCache.get(labelSize); final int labelCharHeight; final int labelCharWidth; if (labelHeightValue != null) { labelCharHeight = labelHeightValue; labelCharWidth = mTextWidthCache.get(labelSize); } else { Rect textBounds = new Rect(); paint.getTextBounds(KEY_LABEL_REFERENCE_CHAR, 0, 1, textBounds); labelCharHeight = textBounds.height(); labelCharWidth = textBounds.width(); mTextHeightCache.put(labelSize, labelCharHeight); mTextWidthCache.put(labelSize, labelCharWidth); } // Vertical label text alignment. final float baseline; if ((key.labelOption & KEY_LABEL_OPTION_ALIGN_BOTTOM) != 0) { baseline = key.height - + labelCharHeight * KEY_LABEL_VERTICAL_PADDING_FACTOR; } else { // Align center final float centerY = (key.height + padding.top - padding.bottom) / 2; baseline = centerY + labelCharHeight * KEY_LABEL_VERTICAL_ADJUSTMENT_FACTOR_CENTER; } // Horizontal label text alignment final int positionX; if ((key.labelOption & KEY_LABEL_OPTION_ALIGN_LEFT) != 0) { positionX = (int)( labelCharWidth * KEY_LABEL_HORIZONTAL_PADDING_FACTOR + padding.left); paint.setTextAlign(Align.LEFT); } else if ((key.labelOption & KEY_LABEL_OPTION_ALIGN_RIGHT) != 0) { positionX = (int)(key.width - labelCharWidth * KEY_LABEL_HORIZONTAL_PADDING_FACTOR - padding.right); paint.setTextAlign(Align.RIGHT); } else { positionX = (key.width + padding.left - padding.right) / 2; paint.setTextAlign(Align.CENTER); } // Set a drop shadow for the text paint.setShadowLayer(mShadowRadius, 0, 0, mShadowColor); canvas.drawText(label, positionX, baseline, paint); // Turn off drop shadow paint.setShadowLayer(0, 0, 0, 0); } // Draw key icon if (key.label == null && key.icon != null) { int drawableWidth = key.icon.getIntrinsicWidth(); int drawableHeight = key.icon.getIntrinsicHeight(); int drawableX = (key.width + padding.left - padding.right - drawableWidth) / 2; int drawableY = (key.height + padding.top - padding.bottom - drawableHeight) / 2; drawIcon(canvas, key.icon, drawableX, drawableY, drawableWidth, drawableHeight); } if (key.hintIcon != null && drawHintIcon) { int drawableWidth = key.width; int drawableHeight = key.height; int drawableX = 0; int drawableY = HINT_ICON_VERTICAL_ADJUSTMENT_PIXEL; Drawable icon = (isManualTemporaryUpperCase && key.manualTemporaryUpperCaseHintIcon != null) ? key.manualTemporaryUpperCaseHintIcon : key.hintIcon; drawIcon(canvas, icon, drawableX, drawableY, drawableWidth, drawableHeight); } canvas.translate(-key.x - kbdPaddingLeft, -key.y - kbdPaddingTop); } 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); } mInvalidatedKey = null; // Overlay a dark rectangle to dim the keyboard if (mMiniKeyboard != null) { paint.setColor((int) (mBackgroundDimAmount * 0xFF) << 24); canvas.drawRect(0, 0, getWidth(), getHeight(), paint); } if (DEBUG) { if (mShowTouchPoints) { for (PointerTracker tracker : mPointerTrackers) { int startX = tracker.getStartX(); int startY = tracker.getStartY(); int lastX = tracker.getLastX(); int lastY = tracker.getLastY(); paint.setAlpha(128); paint.setColor(0xFFFF0000); canvas.drawCircle(startX, startY, 3, paint); canvas.drawLine(startX, startY, lastX, lastY, paint); paint.setColor(0xFF0000FF); canvas.drawCircle(lastX, lastY, 3, paint); paint.setColor(0xFF00FF00); canvas.drawCircle((startX + lastX) / 2, (startY + lastY) / 2, 2, paint); } } } mDrawPending = false; mDirtyRect.setEmpty(); } private 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); } public void setForeground(boolean foreground) { mInForeground = foreground; } // TODO: clean up this method. private void dismissKeyPreview() { for (PointerTracker tracker : mPointerTrackers) tracker.releaseKey(); showPreview(NOT_A_KEY, null); } public void showPreview(int keyIndex, PointerTracker tracker) { int oldKeyIndex = mOldPreviewKeyIndex; mOldPreviewKeyIndex = keyIndex; // We should re-draw popup preview when 1) we need to hide the preview, 2) we will show // the space key preview and 3) pointer moves off the space key to other letter key, we // should hide the preview of the previous key. final boolean hidePreviewOrShowSpaceKeyPreview = (tracker == null) || (SubtypeSwitcher.USE_SPACEBAR_LANGUAGE_SWITCHER && SubtypeSwitcher.getInstance().needsToDisplayLanguage() && (tracker.isSpaceKey(keyIndex) || tracker.isSpaceKey(oldKeyIndex))); // If key changed and preview is on or the key is space (language switch is enabled) if (oldKeyIndex != keyIndex && (mShowPreview || (hidePreviewOrShowSpaceKeyPreview))) { if (keyIndex == NOT_A_KEY) { mHandler.cancelPopupPreview(); mHandler.dismissPreview(mDelayAfterPreview); } else if (tracker != null) { mHandler.popupPreview(mDelayBeforePreview, keyIndex, tracker); } } } // TODO Must fix popup preview on xlarge layout private void showKey(final int keyIndex, PointerTracker tracker) { Key key = tracker.getKey(keyIndex); // If keyIndex is invalid or IME is already closed, we must not show key preview. // Trying to show preview PopupWindow while root window is closed causes // WindowManager.BadTokenException. if (key == null || !mInForeground) return; // What we show as preview should match what we show on key top in onBufferDraw(). if (key.label != null) { // TODO Should take care of temporaryShiftLabel here. mPreviewText.setCompoundDrawables(null, null, null, null); mPreviewText.setText(adjustCase(tracker.getPreviewText(key))); if (key.label.length() > 1 && key.codes.length < 2) { mPreviewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mKeyTextSize); mPreviewText.setTypeface(Typeface.DEFAULT_BOLD); } else { mPreviewText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mPreviewTextSizeLarge); mPreviewText.setTypeface(mKeyTextStyle); } } else { mPreviewText.setCompoundDrawables(null, null, null, key.iconPreview != null ? key.iconPreview : key.icon); mPreviewText.setText(null); } mPreviewText.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)); int popupWidth = Math.max(mPreviewText.getMeasuredWidth(), key.width + mPreviewText.getPaddingLeft() + mPreviewText.getPaddingRight()); final int popupHeight = mPreviewHeight; LayoutParams lp = mPreviewText.getLayoutParams(); if (lp != null) { lp.width = popupWidth; lp.height = popupHeight; } int popupPreviewX = key.x - (popupWidth - key.width) / 2; int popupPreviewY = key.y - popupHeight + mPreviewOffset; mHandler.cancelDismissPreview(); if (mOffsetInWindow == null) { mOffsetInWindow = new int[2]; getLocationInWindow(mOffsetInWindow); mOffsetInWindow[0] += mPopupPreviewOffsetX; // Offset may be zero mOffsetInWindow[1] += mPopupPreviewOffsetY; // Offset may be zero int[] windowLocation = new int[2]; getLocationOnScreen(windowLocation); mWindowY = windowLocation[1]; } // Set the preview background state mPreviewText.getBackground().setState( key.popupResId != 0 ? LONG_PRESSABLE_STATE_SET : EMPTY_STATE_SET); popupPreviewX += mOffsetInWindow[0]; popupPreviewY += mOffsetInWindow[1]; // If the popup cannot be shown above the key, put it on the side if (popupPreviewY + mWindowY < 0) { // If the key you're pressing is on the left side of the keyboard, show the popup on // the right, offset by enough to see at least one key to the left/right. if (key.x + key.width <= getWidth() / 2) { popupPreviewX += (int) (key.width * 2.5); } else { popupPreviewX -= (int) (key.width * 2.5); } popupPreviewY += popupHeight; } try { if (mPreviewPopup.isShowing()) { mPreviewPopup.update(popupPreviewX, popupPreviewY, popupWidth, popupHeight); } else { mPreviewPopup.setWidth(popupWidth); mPreviewPopup.setHeight(popupHeight); mPreviewPopup.showAtLocation(mMiniKeyboardParent, Gravity.NO_GRAVITY, popupPreviewX, popupPreviewY); } } catch (WindowManager.BadTokenException e) { // Swallow the exception which will be happened when IME is already closed. Log.w(TAG, "LatinIME is already closed when tried showing key preview."); } // Record popup preview position to display mini-keyboard later at the same positon mPopupPreviewDisplayedY = popupPreviewY; 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 BaseKeyboard}. * @see #invalidateAllKeys */ public void invalidateKey(Key key) { if (key == null) return; mInvalidatedKey = key; // TODO we should clean up this and record key's region to use in onBufferDraw. mDirtyRect.union(key.x + getPaddingLeft(), key.y + getPaddingTop(), key.x + key.width + getPaddingLeft(), key.y + key.height + getPaddingTop()); onBufferDraw(); invalidate(key.x + getPaddingLeft(), key.y + getPaddingTop(), key.x + key.width + getPaddingLeft(), key.y + key.height + getPaddingTop()); } private boolean openPopupIfRequired(int keyIndex, PointerTracker tracker) { // Check if we have a popup layout specified first. if (mPopupLayout == 0) { return false; } Key popupKey = tracker.getKey(keyIndex); if (popupKey == null) return false; boolean result = onLongPress(popupKey); if (result) { dismissKeyPreview(); mMiniKeyboardTrackerId = tracker.mPointerId; // Mark this tracker "already processed" and remove it from the pointer queue tracker.setAlreadyProcessed(); mPointerQueue.remove(tracker); } return result; } private void onLongPressShiftKey(PointerTracker tracker) { tracker.setAlreadyProcessed(); mPointerQueue.remove(tracker); mKeyboardActionListener.onKey(LatinKeyboardView.KEYCODE_CAPSLOCK, null, 0, 0); } private View inflateMiniKeyboardContainer(Key popupKey) { int popupKeyboardId = popupKey.popupResId; LayoutInflater inflater = (LayoutInflater)getContext().getSystemService( Context.LAYOUT_INFLATER_SERVICE); View container = inflater.inflate(mPopupLayout, null); if (container == null) throw new NullPointerException(); BaseKeyboardView miniKeyboard = (BaseKeyboardView)container.findViewById(R.id.BaseKeyboardView); miniKeyboard.setOnKeyboardActionListener(new OnKeyboardActionListener() { public void onKey(int primaryCode, int[] keyCodes, int x, int y) { mKeyboardActionListener.onKey(primaryCode, keyCodes, x, y); dismissPopupKeyboard(); } public void onText(CharSequence text) { mKeyboardActionListener.onText(text); dismissPopupKeyboard(); } public void onCancel() { dismissPopupKeyboard(); } public void swipeLeft() { } public void swipeRight() { } public void swipeUp() { } public void swipeDown() { } public void onPress(int primaryCode) { mKeyboardActionListener.onPress(primaryCode); } public void onRelease(int primaryCode) { mKeyboardActionListener.onRelease(primaryCode); } }); // Override default ProximityKeyDetector. miniKeyboard.mKeyDetector = new MiniKeyboardKeyDetector(mMiniKeyboardSlideAllowance); // Remove gesture detector on mini-keyboard miniKeyboard.mGestureDetector = null; BaseKeyboard keyboard; if (popupKey.popupCharacters != null) { keyboard = new BaseKeyboard(getContext(), popupKeyboardId, popupKey.popupCharacters, -1, getPaddingLeft() + getPaddingRight()); } else { keyboard = new BaseKeyboard(getContext(), popupKeyboardId); } miniKeyboard.setKeyboard(keyboard); miniKeyboard.setPopupParent(this); 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).edgeFlags; // 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 & BaseKeyboard.EDGE_TOP) != 0 && (edgeFlags & BaseKeyboard.EDGE_BOTTOM) != 0; } /** * Called when a key is long pressed. By default this will open any popup keyboard associated * with this key through the attributes popupLayout and popupCharacters. * @param popupKey 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 popupKey) { // TODO if popupKey.popupCharacters has only one letter, send it as key without opening // mini keyboard. if (popupKey.popupResId == 0) return false; View container = mMiniKeyboardCache.get(popupKey); if (container == null) { container = inflateMiniKeyboardContainer(popupKey); mMiniKeyboardCache.put(popupKey, container); } mMiniKeyboard = (BaseKeyboardView)container.findViewById(R.id.BaseKeyboardView); if (mWindowOffset == null) { mWindowOffset = new int[2]; getLocationInWindow(mWindowOffset); } // Get width of a key in the mini popup keyboard = "miniKeyWidth". // On the other hand, "popupKey.width" is width of the pressed key on the main keyboard. // We adjust the position of mini popup keyboard with the edge key in it: // a) When we have the leftmost key in popup keyboard directly above the pressed key // Right edges of both keys should be aligned for consistent default selection // b) When we have the rightmost key in popup keyboard directly above the pressed key // Left edges of both keys should be aligned for consistent default selection final List miniKeys = mMiniKeyboard.getKeyboard().getKeys(); final int miniKeyWidth = miniKeys.size() > 0 ? miniKeys.get(0).width : 0; // HACK: Have the leftmost number in the popup characters right above the key boolean isNumberAtLeftmost = hasMultiplePopupChars(popupKey) && isNumberAtLeftmostPopupChar(popupKey); int popupX = popupKey.x + mWindowOffset[0]; popupX += getPaddingLeft(); if (isNumberAtLeftmost) { popupX += popupKey.width - miniKeyWidth; // adjustment for a) described above popupX -= container.getPaddingLeft(); } else { popupX += miniKeyWidth; // adjustment for b) described above popupX -= container.getMeasuredWidth(); popupX += container.getPaddingRight(); } int popupY = popupKey.y + mWindowOffset[1]; popupY += getPaddingTop(); popupY -= container.getMeasuredHeight(); popupY += container.getPaddingBottom(); final int x = popupX; final int y = mShowPreview && isOneRowKeys(miniKeys) ? mPopupPreviewDisplayedY : popupY; int adjustedX = x; if (x < 0) { adjustedX = 0; } else if (x > (getMeasuredWidth() - container.getMeasuredWidth())) { adjustedX = getMeasuredWidth() - container.getMeasuredWidth(); } mMiniKeyboardOriginX = adjustedX + container.getPaddingLeft() - mWindowOffset[0]; mMiniKeyboardOriginY = y + container.getPaddingTop() - mWindowOffset[1]; mMiniKeyboard.setPopupOffset(adjustedX, y); // TODO: change the below line to use getLatinKeyboard() instead of getKeyboard() BaseKeyboard baseMiniKeyboard = mMiniKeyboard.getKeyboard(); if (baseMiniKeyboard != null && baseMiniKeyboard.setShifted(mKeyboard == null ? false : mKeyboard.isShiftedOrShiftLocked())) { mMiniKeyboard.invalidateAllKeys(); } // Mini keyboard needs no pop-up key preview displayed. mMiniKeyboard.setPreviewEnabled(false); mMiniKeyboardPopup.setContentView(container); mMiniKeyboardPopup.setWidth(container.getMeasuredWidth()); mMiniKeyboardPopup.setHeight(container.getMeasuredHeight()); mMiniKeyboardPopup.showAtLocation(this, Gravity.NO_GRAVITY, x, y); // Inject down event on the key to mini keyboard. long eventTime = SystemClock.uptimeMillis(); mMiniKeyboardPopupTime = eventTime; MotionEvent downEvent = generateMiniKeyboardMotionEvent(MotionEvent.ACTION_DOWN, popupKey.x + popupKey.width / 2, popupKey.y + popupKey.height / 2, eventTime); mMiniKeyboard.onTouchEvent(downEvent); downEvent.recycle(); invalidateAllKeys(); return true; } private static boolean hasMultiplePopupChars(Key key) { if (key.popupCharacters != null && key.popupCharacters.length() > 1) { return true; } return false; } private static boolean isNumberAtLeftmostPopupChar(Key key) { if (key.popupCharacters != null && key.popupCharacters.length() > 0 && isAsciiDigit(key.popupCharacters.charAt(0))) { return true; } return false; } private static boolean isAsciiDigit(char c) { return (c < 0x80) && Character.isDigit(c); } private MotionEvent generateMiniKeyboardMotionEvent(int action, int x, int y, long eventTime) { return MotionEvent.obtain(mMiniKeyboardPopupTime, eventTime, action, x - mMiniKeyboardOriginX, y - mMiniKeyboardOriginY, 0); } private PointerTracker getPointerTracker(final int id) { final ArrayList pointers = mPointerTrackers; final Key[] keys = mKeys; final OnKeyboardActionListener 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, mHandler, mKeyDetector, this, getResources()); if (keys != null) tracker.setKeyboard(mKeyboard, keys, mKeyHysteresisDistance); if (listener != null) tracker.setOnKeyboardActionListener(listener); pointers.add(tracker); } return pointers.get(id); } @Override public boolean onTouchEvent(MotionEvent me) { final int pointerCount = me.getPointerCount(); final int action = me.getActionMasked(); // 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 && pointerCount > 1 && mOldPointerCount > 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. if (mMiniKeyboard == null && mGestureDetector != null && mGestureDetector.onTouchEvent(me)) { dismissKeyPreview(); 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 (mMiniKeyboard != 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); mMiniKeyboard.onTouchEvent(translated); translated.recycle(); } return true; } if (mHandler.isInKeyRepeat()) { // It will keep being in the key repeating mode while the key is being pressed. if (action == MotionEvent.ACTION_MOVE) { return true; } 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) { // Use only main (id=0) pointer tracker. PointerTracker tracker = getPointerTracker(0); int oldPointerCount = mOldPointerCount; if (pointerCount == 1 && oldPointerCount == 2) { // Multi-touch to single touch transition. // Send a down event for the latest pointer. tracker.onDownEvent(x, y, eventTime); } else if (pointerCount == 2 && oldPointerCount == 1) { // Single-touch to multi-touch transition. // Send an up event for the last pointer. tracker.onUpEvent(tracker.getLastX(), tracker.getLastY(), eventTime); } else if (pointerCount == 1 && oldPointerCount == 1) { tracker.onTouchEvent(action, x, y, eventTime); } else { Log.w(TAG, "Unknown touch panel behavior: pointer count is " + pointerCount + " (old " + oldPointerCount + ")"); } mOldPointerCount = pointerCount; return true; } if (action == MotionEvent.ACTION_MOVE) { for (int i = 0; i < pointerCount; i++) { PointerTracker tracker = getPointerTracker(me.getPointerId(i)); tracker.onMoveEvent((int)me.getX(i), (int)me.getY(i), eventTime); } } else { PointerTracker tracker = getPointerTracker(id); switch (action) { case MotionEvent.ACTION_DOWN: case MotionEvent.ACTION_POINTER_DOWN: onDownEvent(tracker, x, y, eventTime); break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_POINTER_UP: onUpEvent(tracker, x, y, eventTime); break; case MotionEvent.ACTION_CANCEL: onCancelEvent(tracker, x, y, eventTime); break; } } return true; } private void onDownEvent(PointerTracker tracker, int x, int y, long eventTime) { if (tracker.isOnModifierKey(x, y)) { // Before processing a down event of modifier key, all pointers already being tracked // should be released. mPointerQueue.releaseAllPointersExcept(null, eventTime); } tracker.onDownEvent(x, y, eventTime); mPointerQueue.add(tracker); } private void onUpEvent(PointerTracker tracker, int x, int y, long eventTime) { if (tracker.isModifier()) { // Before processing an up event of modifier key, all pointers already being tracked // should be released. mPointerQueue.releaseAllPointersExcept(tracker, eventTime); } else { int index = mPointerQueue.lastIndexOf(tracker); if (index >= 0) { mPointerQueue.releaseAllPointersOlderThan(tracker, eventTime); } else { Log.w(TAG, "onUpEvent: corresponding down event not found for pointer " + tracker.mPointerId); } } tracker.onUpEvent(x, y, eventTime); mPointerQueue.remove(tracker); } private void onCancelEvent(PointerTracker tracker, int x, int y, long eventTime) { tracker.onCancelEvent(x, y, eventTime); mPointerQueue.remove(tracker); } protected void swipeRight() { mKeyboardActionListener.swipeRight(); } protected void swipeLeft() { mKeyboardActionListener.swipeLeft(); } protected void swipeUp() { mKeyboardActionListener.swipeUp(); } protected void swipeDown() { mKeyboardActionListener.swipeDown(); } public void closing() { mPreviewPopup.dismiss(); mHandler.cancelAllMessages(); dismissPopupKeyboard(); mBuffer = null; mCanvas = null; mMiniKeyboardCache.clear(); } @Override public void onDetachedFromWindow() { super.onDetachedFromWindow(); closing(); } private void dismissPopupKeyboard() { if (mMiniKeyboardPopup.isShowing()) { mMiniKeyboardPopup.dismiss(); mMiniKeyboard = null; mMiniKeyboardOriginX = 0; mMiniKeyboardOriginY = 0; invalidateAllKeys(); } } public boolean handleBack() { if (mMiniKeyboardPopup.isShowing()) { dismissPopupKeyboard(); return true; } return false; } }