LatinIME/java/src/com/android/inputmethod/latin/BaseKeyboardView.java
Tadashi G. Takaoka fab243a183 Use normal font for functional key label instead of italic font
This change also uses slightly larger font size for functional key
label according to the v4 keyboard design.

Bug: 3216592
Change-Id: I027f109b7748ade8564dc808487d9a6ce1da9761
2010-11-23 00:38:09 -08:00

1522 lines
62 KiB
Java

/*
* 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<Key, View> mMiniKeyboardCache = new WeakHashMap<Key, View>();
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<PointerTracker> mPointerTrackers = new ArrayList<PointerTracker>();
// 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<Integer, Integer> mTextHeightCache = new HashMap<Integer, Integer>();
// This map caches key label text width in pixel as value and key label text size as map key.
private final HashMap<Integer, Integer> mTextWidthCache = new HashMap<Integer, Integer>();
// 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<PointerTracker> mQueue = new LinkedList<PointerTracker>();
public void add(PointerTracker tracker) {
mQueue.add(tracker);
}
public int lastIndexOf(PointerTracker tracker) {
LinkedList<PointerTracker> 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<PointerTracker> 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<Integer, Integer> histogram = new HashMap<Integer, Integer>();
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<Key> 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<Key> 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<PointerTracker> 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;
}
}