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author | 2010-12-27 20:13:16 +0900 | |
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committer | 2010-12-27 20:13:16 +0900 | |
commit | d12def6dc8ba3a2f47b90e6d5d442f315152c6d4 (patch) | |
tree | 7274b29f518f94d31cd5c995d1b46bfc323de818 /java/src/com/android/inputmethod/latin/SwipeTracker.java | |
parent | b80f171623a11bceb99b563594162d0034b9bde8 (diff) | |
parent | bfe2b534457d946645d483e311249787ba4fc3ae (diff) | |
download | latinime-d12def6dc8ba3a2f47b90e6d5d442f315152c6d4.tar.gz latinime-d12def6dc8ba3a2f47b90e6d5d442f315152c6d4.tar.xz latinime-d12def6dc8ba3a2f47b90e6d5d442f315152c6d4.zip |
Merge remote branch 'goog/master' into merge
Conflicts:
java/res/values-cs/strings.xml
java/res/values-da/strings.xml
java/res/values-de/strings.xml
java/res/values-el/strings.xml
java/res/values-es-rUS/strings.xml
java/res/values-es/strings.xml
java/res/values-fr/strings.xml
java/res/values-it/strings.xml
java/res/values-ja/strings.xml
java/res/values-ko/strings.xml
java/res/values-nb/strings.xml
java/res/values-nl/strings.xml
java/res/values-pl/strings.xml
java/res/values-pt-rPT/strings.xml
java/res/values-pt/strings.xml
java/res/values-ru/strings.xml
java/res/values-sv/strings.xml
java/res/values-tr/strings.xml
java/res/values-xlarge/dimens.xml
java/res/values-zh-rCN/strings.xml
java/res/values-zh-rTW/strings.xml
java/res/values/bools.xml
java/res/xml/kbd_qwerty_rows.xml
java/res/xml/method.xml
java/res/xml/prefs.xml
Change-Id: I8768d16965e6e82c14ee742b9ada56438497eb86
Diffstat (limited to 'java/src/com/android/inputmethod/latin/SwipeTracker.java')
-rw-r--r-- | java/src/com/android/inputmethod/latin/SwipeTracker.java | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/java/src/com/android/inputmethod/latin/SwipeTracker.java b/java/src/com/android/inputmethod/latin/SwipeTracker.java deleted file mode 100644 index 970e91965..000000000 --- a/java/src/com/android/inputmethod/latin/SwipeTracker.java +++ /dev/null @@ -1,157 +0,0 @@ -/* - * Copyright (C) 2010 Google Inc. - * - * 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.view.MotionEvent; - -class SwipeTracker { - private static final int NUM_PAST = 4; - private static final int LONGEST_PAST_TIME = 200; - - final EventRingBuffer mBuffer = new EventRingBuffer(NUM_PAST); - - private float mYVelocity; - private float mXVelocity; - - public void addMovement(MotionEvent ev) { - if (ev.getAction() == MotionEvent.ACTION_DOWN) { - mBuffer.clear(); - return; - } - long time = ev.getEventTime(); - final int count = ev.getHistorySize(); - for (int i = 0; i < count; i++) { - addPoint(ev.getHistoricalX(i), ev.getHistoricalY(i), ev.getHistoricalEventTime(i)); - } - addPoint(ev.getX(), ev.getY(), time); - } - - private void addPoint(float x, float y, long time) { - final EventRingBuffer buffer = mBuffer; - while (buffer.size() > 0) { - long lastT = buffer.getTime(0); - if (lastT >= time - LONGEST_PAST_TIME) - break; - buffer.dropOldest(); - } - buffer.add(x, y, time); - } - - public void computeCurrentVelocity(int units) { - computeCurrentVelocity(units, Float.MAX_VALUE); - } - - public void computeCurrentVelocity(int units, float maxVelocity) { - final EventRingBuffer buffer = mBuffer; - final float oldestX = buffer.getX(0); - final float oldestY = buffer.getY(0); - final long oldestTime = buffer.getTime(0); - - float accumX = 0; - float accumY = 0; - final int count = buffer.size(); - for (int pos = 1; pos < count; pos++) { - final int dur = (int)(buffer.getTime(pos) - oldestTime); - if (dur == 0) continue; - float dist = buffer.getX(pos) - oldestX; - float vel = (dist / dur) * units; // pixels/frame. - if (accumX == 0) accumX = vel; - else accumX = (accumX + vel) * .5f; - - dist = buffer.getY(pos) - oldestY; - vel = (dist / dur) * units; // pixels/frame. - if (accumY == 0) accumY = vel; - else accumY = (accumY + vel) * .5f; - } - mXVelocity = accumX < 0.0f ? Math.max(accumX, -maxVelocity) - : Math.min(accumX, maxVelocity); - mYVelocity = accumY < 0.0f ? Math.max(accumY, -maxVelocity) - : Math.min(accumY, maxVelocity); - } - - public float getXVelocity() { - return mXVelocity; - } - - public float getYVelocity() { - return mYVelocity; - } - - static class EventRingBuffer { - private final int bufSize; - private final float xBuf[]; - private final float yBuf[]; - private final long timeBuf[]; - private int top; // points new event - private int end; // points oldest event - private int count; // the number of valid data - - public EventRingBuffer(int max) { - this.bufSize = max; - xBuf = new float[max]; - yBuf = new float[max]; - timeBuf = new long[max]; - clear(); - } - - public void clear() { - top = end = count = 0; - } - - public int size() { - return count; - } - - // Position 0 points oldest event - private int index(int pos) { - return (end + pos) % bufSize; - } - - private int advance(int index) { - return (index + 1) % bufSize; - } - - public void add(float x, float y, long time) { - xBuf[top] = x; - yBuf[top] = y; - timeBuf[top] = time; - top = advance(top); - if (count < bufSize) { - count++; - } else { - end = advance(end); - } - } - - public float getX(int pos) { - return xBuf[index(pos)]; - } - - public float getY(int pos) { - return yBuf[index(pos)]; - } - - public long getTime(int pos) { - return timeBuf[index(pos)]; - } - - public void dropOldest() { - count--; - end = advance(end); - } - } -}
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