/* * 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 android.content.Context; 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.inputmethodservice.Keyboard; import android.inputmethodservice.Keyboard.Key; import android.os.Handler; import android.os.Message; 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.widget.PopupWindow; import android.widget.TextView; import java.util.ArrayList; import java.util.HashMap; import java.util.LinkedList; import java.util.Map; /** * A view that renders a virtual {@link LatinKeyboard}. It handles rendering of keys and * detecting key presses and touch movements. * * @attr ref R.styleable#LatinKeyboardBaseView_keyBackground * @attr ref R.styleable#LatinKeyboardBaseView_keyPreviewLayout * @attr ref R.styleable#LatinKeyboardBaseView_keyPreviewOffset * @attr ref R.styleable#LatinKeyboardBaseView_labelTextSize * @attr ref R.styleable#LatinKeyboardBaseView_keyTextSize * @attr ref R.styleable#LatinKeyboardBaseView_keyTextColor * @attr ref R.styleable#LatinKeyboardBaseView_verticalCorrection * @attr ref R.styleable#LatinKeyboardBaseView_popupLayout */ public class LatinKeyboardBaseView extends View implements PointerTracker.UIProxy { private static final String TAG = "LatinKeyboardBaseView"; private static final boolean DEBUG = 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 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 static final int DELAY_BEFORE_PREVIEW = 0; private static final int DELAY_AFTER_PREVIEW = 70; private static final int REPEAT_INTERVAL = PointerTracker.REPEAT_INTERVAL; // Miscellaneous constants /* package */ static final int NOT_A_KEY = -1; private static final int[] LONG_PRESSABLE_STATE_SET = { android.R.attr.state_long_pressable }; // 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 mVerticalCorrection; private int mPreviewOffset; private int mPreviewHeight; private int mPopupLayout; // Main keyboard private Keyboard mKeyboard; private Key[] mKeys; // Key preview popup private final static boolean PREVIEW_CENTERED = false; 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 mPopupPreviewX; private int mPopupPreviewY; private int mPopupPreviewOffsetX; private int mPopupPreviewOffsetY; private int mWindowY; // Popup mini keyboard private PopupWindow mMiniKeyboardPopup; private LatinKeyboardBaseView mMiniKeyboard; private View mMiniKeyboardParent; private Map mMiniKeyboardCache; private int mMiniKeyboardOriginX; private int mMiniKeyboardOriginY; private long mMiniKeyboardPopupTime; private int[] mWindowOffset; /** Listener for {@link OnKeyboardActionListener}. */ private OnKeyboardActionListener mKeyboardActionListener; private final ArrayList mPointerTrackers = new ArrayList(); private final PointerQueue mPointerQueue = new PointerQueue(); private final float mDebounceHysteresis; protected KeyDetector mKeyDetector = new ProximityKeyDetector(); // Swipe gesture detector private final 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); 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 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: mPreviewText.setVisibility(INVISIBLE); break; case MSG_REPEAT_KEY: { final PointerTracker tracker = (PointerTracker)msg.obj; tracker.repeatKey(msg.arg1); startKeyRepeatTimer(REPEAT_INTERVAL, msg.arg1, tracker); break; } case MSG_LONGPRESS_KEY: { final PointerTracker tracker = (PointerTracker)msg.obj; openPopupIfRequired(msg.arg1, 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) { removeMessages(MSG_LONGPRESS_KEY); sendMessageDelayed(obtainMessage(MSG_LONGPRESS_KEY, keyIndex, 0, tracker), delay); } public void cancelLongPressTimer() { removeMessages(MSG_LONGPRESS_KEY); } public void cancelKeyTimers() { cancelKeyRepeatTimer(); cancelLongPressTimer(); } 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 releasePointersOlderThan(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); queue.remove(oldestPos); } } } public void remove(PointerTracker tracker) { mQueue.remove(tracker); } } public LatinKeyboardBaseView(Context context, AttributeSet attrs) { this(context, attrs, R.attr.keyboardViewStyle); } public LatinKeyboardBaseView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); TypedArray a = context.obtainStyledAttributes( attrs, R.styleable.LatinKeyboardBaseView, defStyle, R.style.LatinKeyboardBaseView); 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.LatinKeyboardBaseView_keyBackground: mKeyBackground = a.getDrawable(attr); break; case R.styleable.LatinKeyboardBaseView_verticalCorrection: mVerticalCorrection = a.getDimensionPixelOffset(attr, 0); break; case R.styleable.LatinKeyboardBaseView_keyPreviewLayout: previewLayout = a.getResourceId(attr, 0); break; case R.styleable.LatinKeyboardBaseView_keyPreviewOffset: mPreviewOffset = a.getDimensionPixelOffset(attr, 0); break; case R.styleable.LatinKeyboardBaseView_keyPreviewHeight: mPreviewHeight = a.getDimensionPixelSize(attr, 80); break; case R.styleable.LatinKeyboardBaseView_keyTextSize: mKeyTextSize = a.getDimensionPixelSize(attr, 18); break; case R.styleable.LatinKeyboardBaseView_keyTextColor: mKeyTextColor = a.getColor(attr, 0xFF000000); break; case R.styleable.LatinKeyboardBaseView_labelTextSize: mLabelTextSize = a.getDimensionPixelSize(attr, 14); break; case R.styleable.LatinKeyboardBaseView_popupLayout: mPopupLayout = a.getResourceId(attr, 0); break; case R.styleable.LatinKeyboardBaseView_shadowColor: mShadowColor = a.getColor(attr, 0); break; case R.styleable.LatinKeyboardBaseView_shadowRadius: mShadowRadius = a.getFloat(attr, 0f); break; // TODO: Use Theme (android.R.styleable.Theme_backgroundDimAmount) case R.styleable.LatinKeyboardBaseView_backgroundDimAmount: mBackgroundDimAmount = a.getFloat(attr, 0.5f); break; //case android.R.styleable. case R.styleable.LatinKeyboardBaseView_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.LatinKeyboardBaseView_symbolColorScheme: mSymbolColorScheme = a.getInt(attr, 0); break; } } mPreviewPopup = new PopupWindow(context); if (previewLayout != 0) { mPreviewText = (TextView) inflate.inflate(previewLayout, null); mPreviewTextSizeLarge = (int) mPreviewText.getTextSize(); mPreviewPopup.setContentView(mPreviewText); mPreviewPopup.setBackgroundDrawable(null); } else { mShowPreview = false; } mPreviewPopup.setTouchable(false); mMiniKeyboardParent = this; mMiniKeyboardPopup = new PopupWindow(context); mMiniKeyboardPopup.setBackgroundDrawable(null); mPaint = new Paint(); mPaint.setAntiAlias(true); mPaint.setTextSize(keyTextSize); mPaint.setTextAlign(Align.CENTER); mPaint.setAlpha(255); mPadding = new Rect(0, 0, 0, 0); mMiniKeyboardCache = new HashMap(); mKeyBackground.getPadding(mPadding); final Resources res = getResources(); mSwipeThreshold = (int) (500 * res.getDisplayMetrics().density); // TODO: Refer frameworks/base/core/res/res/values/config.xml mDisambiguateSwipe = res.getBoolean(R.bool.config_swipeDisambiguation); mDebounceHysteresis = res.getDimension(R.dimen.key_debounce_hysteresis_distance); 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); } 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 Keyboard * @see #getKeyboard() * @param keyboard the keyboard to display in this view */ public void setKeyboard(Keyboard 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(mKeys, mDebounceHysteresis); } requestLayout(); // Hint to reallocate the buffer if the size changed mKeyboardChanged = true; invalidateAllKeys(); computeProximityThreshold(keyboard); mMiniKeyboardCache.clear(); } /** * Returns the current keyboard being displayed by this view. * @return the currently attached keyboard * @see #setKeyboard(Keyboard) */ public Keyboard getKeyboard() { return mKeyboard; } /** * Sets the state of the shift key of the keyboard, if any. * @param shifted whether or not to enable the state of the shift key * @return true if the shift key state changed, false if there was no change */ public boolean setShifted(boolean shifted) { if (mKeyboard != null) { if (mKeyboard.setShifted(shifted)) { // The whole keyboard probably needs to be redrawn invalidateAllKeys(); return true; } } return false; } /** * Returns the state of the shift key of the keyboard, if any. * @return true if the shift is in a pressed state, false otherwise. If there is * no shift key on the keyboard or there is no keyboard attached, it returns false. */ public boolean isShifted() { if (mKeyboard != null) { return mKeyboard.isShifted(); } return false; } /** * 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 getSymbolColorSheme() { return mSymbolColorScheme; } public void setPopupParent(View v) { mMiniKeyboardParent = v; } public void setPopupOffset(int x, int y) { mPopupPreviewOffsetX = x; mPopupPreviewOffsetY = y; if (mPreviewPopup.isShowing()) { 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.isShifted() && 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 average distance between adjacent keys (horizontally and vertically) * and square it to get the proximity threshold. We use a square here and in computing * the touch distance from a key's center to avoid taking a square root. * @param keyboard */ private void computeProximityThreshold(Keyboard keyboard) { if (keyboard == null) return; final Key[] keys = mKeys; if (keys == null) return; int length = keys.length; int dimensionSum = 0; for (int i = 0; i < length; i++) { Key key = keys[i]; dimensionSum += Math.min(key.width, key.height) + key.gap; } if (dimensionSum < 0 || length == 0) return; mKeyDetector.setProximityThreshold((int) (dimensionSum * 1.4f / length)); } @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; paint.setColor(mKeyTextColor); boolean drawSingleKey = false; if (invalidKey != null && canvas.getClipBounds(clipRegion)) { // 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); if (label != null) { // For characters, use large font. For labels like "Done", use small font. if (label.length() > 1 && key.codes.length < 2) { paint.setTextSize(mLabelTextSize); paint.setTypeface(Typeface.DEFAULT_BOLD); } else { paint.setTextSize(mKeyTextSize); paint.setTypeface(mKeyTextStyle); } // Draw a drop shadow for the text paint.setShadowLayer(mShadowRadius, 0, 0, mShadowColor); // Draw the text canvas.drawText(label, (key.width - padding.left - padding.right) / 2 + padding.left, (key.height - padding.top - padding.bottom) / 2 + (paint.getTextSize() - paint.descent()) / 2 + padding.top, paint); // Turn off drop shadow paint.setShadowLayer(0, 0, 0, 0); } else if (key.icon != null) { final int drawableX = (key.width - padding.left - padding.right - key.icon.getIntrinsicWidth()) / 2 + padding.left; final int drawableY = (key.height - padding.top - padding.bottom - key.icon.getIntrinsicHeight()) / 2 + padding.top; canvas.translate(drawableX, drawableY); key.icon.setBounds(0, 0, key.icon.getIntrinsicWidth(), key.icon.getIntrinsicHeight()); key.icon.draw(canvas); canvas.translate(-drawableX, -drawableY); } canvas.translate(-key.x - kbdPaddingLeft, -key.y - kbdPaddingTop); } 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(); } // TODO: clean up this method. private void dismissKeyPreview() { for (PointerTracker tracker : mPointerTrackers) tracker.updateKey(NOT_A_KEY); showPreview(NOT_A_KEY, null); } public void showPreview(int keyIndex, PointerTracker tracker) { int oldKeyIndex = mOldPreviewKeyIndex; mOldPreviewKeyIndex = keyIndex; // If key changed and preview is on ... if (oldKeyIndex != keyIndex && mShowPreview) { if (keyIndex == NOT_A_KEY) { mHandler.cancelPopupPreview(); mHandler.dismissPreview(DELAY_AFTER_PREVIEW); } else if (tracker != null) { mHandler.popupPreview(DELAY_BEFORE_PREVIEW, keyIndex, tracker); } } } private void showKey(final int keyIndex, PointerTracker tracker) { Key key = tracker.getKey(keyIndex); if (key == null) return; final PopupWindow previewPopup = mPreviewPopup; if (key.icon != null) { mPreviewText.setCompoundDrawables(null, null, null, key.iconPreview != null ? key.iconPreview : key.icon); mPreviewText.setText(null); } else { 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); } } 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; } if (PREVIEW_CENTERED) { // TODO: Fix this if centering is brought back mPopupPreviewX = 160 - mPreviewText.getMeasuredWidth() / 2; mPopupPreviewY = - mPreviewText.getMeasuredHeight(); } else { mPopupPreviewX = key.x - mPreviewText.getPaddingLeft() + getPaddingLeft(); mPopupPreviewY = 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[] mWindowLocation = new int[2]; getLocationOnScreen(mWindowLocation); mWindowY = mWindowLocation[1]; } // Set the preview background state mPreviewText.getBackground().setState( key.popupResId != 0 ? LONG_PRESSABLE_STATE_SET : EMPTY_STATE_SET); mPopupPreviewX += mOffsetInWindow[0]; mPopupPreviewY += mOffsetInWindow[1]; // If the popup cannot be shown above the key, put it on the side if (mPopupPreviewY + 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) { mPopupPreviewX += (int) (key.width * 2.5); } else { mPopupPreviewX -= (int) (key.width * 2.5); } mPopupPreviewY += popupHeight; } if (previewPopup.isShowing()) { previewPopup.update(mPopupPreviewX, mPopupPreviewY, popupWidth, popupHeight); } else { previewPopup.setWidth(popupWidth); previewPopup.setHeight(popupHeight); previewPopup.showAtLocation(mMiniKeyboardParent, Gravity.NO_GRAVITY, mPopupPreviewX, mPopupPreviewY); } 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 */ public void invalidateKey(Key key) { if (key == null) return; mInvalidatedKey = key; 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) { tracker.setAlreadyProcessed(); dismissKeyPreview(); } return result; } 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(); mMiniKeyboard = (LatinKeyboardBaseView)container.findViewById(R.id.LatinKeyboardBaseView); mMiniKeyboard.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 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); } }); Keyboard keyboard; if (popupKey.popupCharacters != null) { keyboard = new Keyboard(getContext(), popupKeyboardId, popupKey.popupCharacters, -1, getPaddingLeft() + getPaddingRight()); } else { keyboard = new Keyboard(getContext(), popupKeyboardId); } mMiniKeyboard.setKeyboard(keyboard); mMiniKeyboard.setPopupParent(this); container.measure(MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.AT_MOST), MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.AT_MOST)); return container; } /** * 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 = (LatinKeyboardBaseView)container.findViewById(R.id.LatinKeyboardBaseView); if (mWindowOffset == null) { mWindowOffset = new int[2]; getLocationInWindow(mWindowOffset); } int popupX = popupKey.x + popupKey.width + getPaddingLeft(); int popupY = popupKey.y + getPaddingTop(); popupX -= container.getMeasuredWidth(); popupY -= container.getMeasuredHeight(); popupX += mWindowOffset[0]; popupY += mWindowOffset[1]; final int x = popupX + container.getPaddingRight(); final int y = popupY + container.getPaddingBottom(); mMiniKeyboardOriginX = (x < 0 ? 0 : x) + container.getPaddingLeft(); mMiniKeyboardOriginY = y + container.getPaddingTop(); mMiniKeyboard.setPopupOffset((x < 0) ? 0 : x, y); mMiniKeyboard.setShifted(isShifted()); mMiniKeyboard.setPreviewEnabled(isPreviewEnabled()); 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 = System.currentTimeMillis(); 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 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); if (keys != null) tracker.setKeyboard(keys, mDebounceHysteresis); 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(); final long eventTime = me.getEventTime(); // Track the last few movements to look for spurious swipes. mSwipeTracker.addMovement(me); // We must disable gesture detector while mini-keyboard is on the screen. if (mMiniKeyboard == null && mGestureDetector.onTouchEvent(me)) { dismissKeyPreview(); mHandler.cancelKeyTimers(); return true; } // Needs to be called after the gesture detector gets a turn, as it may have // displayed the mini keyboard if (mMiniKeyboard != null) { MotionEvent translated = generateMiniKeyboardMotionEvent(action, (int)me.getX(), (int)me.getY(), eventTime); mMiniKeyboard.onTouchEvent(translated); translated.recycle(); return true; } if (mHandler.isInKeyRepeat()) { // It'll be canceled if 2 or more keys are in action. Otherwise it will keep being in // the key repeating mode while the key is being pressed. if (pointerCount > 1) { mHandler.cancelKeyRepeatTimer(); } else if (action == MotionEvent.ACTION_MOVE) { return true; } // Up event will pass through. } if (action == MotionEvent.ACTION_MOVE) { for (int index = 0; index < pointerCount; index++) { int x = (int)me.getX(index); int y = (int)me.getY(index); int id = me.getPointerId(index); PointerTracker tracker = getPointerTracker(id); tracker.onMoveEvent(x, y, eventTime); } } else { int index = me.getActionIndex(); int x = (int)me.getX(index); int y = (int)me.getY(index); int id = me.getPointerId(index); 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) { tracker.onDownEvent(x, y, eventTime); mPointerQueue.add(tracker); } private void onUpEvent(PointerTracker tracker, int x, int y, long eventTime) { int index = mPointerQueue.lastIndexOf(tracker); if (index >= 0) { mPointerQueue.releasePointersOlderThan(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() { if (mPreviewPopup.isShowing()) { 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; } }