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Tuning gesture detection parameters 

Bug: 7032858
Change-Id: Ie4f952aa33b99ce16027500a596d723ee9bafae9
main
Tadashi G. Takaoka 2012-10-09 14:31:13 +09:00
parent 2e3f261df8
commit 7a17c1fcb5
3 changed files with 31 additions and 37 deletions
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2
java/res/values/config.xml
View File

@ -81,7 +81,7 @@
<integer name="config_gesture_dynamic_time_threshold_to">20</integer>
<!-- Distance based threshold values for gesture detection (keyWidth%/sec) -->
<fraction name="config_gesture_dynamic_distance_threshold_from">600%</fraction>
<fraction name="config_gesture_dynamic_distance_threshold_to">35%</fraction>
<fraction name="config_gesture_dynamic_distance_threshold_to">50%</fraction>
<!-- Parameter for gesture sampling (keyWidth%/sec) -->
<fraction name="config_gesture_sampling_minimum_distance">16.6666%</fraction>
<!-- Parameters for gesture recognition (msec) and (keyWidth%/sec) -->

49
java/src/com/android/inputmethod/keyboard/PointerTracker.java
View File

@ -192,47 +192,32 @@ public final class PointerTracker implements PointerTrackerQueue.Element {
gestureStrokeParams.mStaticTimeThresholdAfterFastTyping;
}
private void recordTyping(final long eventTime) {
mLastTypingTime = eventTime;
}
private void recordLetterTyping(final long eventTime) {
mLastLetterTypingTime = eventTime;
// Reset gesture typing time
mLastBatchInputTime = 0;
}
private void recordGestureTyping(final long eventTime) {
mLastBatchInputTime = eventTime;
// Reset typing time.
mLastTypingTime = 0;
}
private boolean isInTyping() {
return mLastTypingTime != 0;
}
private boolean isInBatchInput() {
return mLastBatchInputTime != 0;
private boolean wasLastInputTyping() {
return mLastTypingTime >= mLastBatchInputTime;
}
public void onCodeInput(final int code, final long eventTime) {
if (Keyboard.isLetterCode(code) && code != Keyboard.CODE_SPACE) {
if (isInTyping()
&& eventTime - mLastTypingTime < mStaticTimeThresholdAfterFastTyping) {
recordLetterTyping(eventTime);
// Record the letter typing time when
// 1. Letter keys are typed successively without any batch input in between.
// 2. A letter key is typed within the threshold time since the last any key typing.
// 3. A non-letter key is typed within the threshold time since the last letter key
// typing.
if (Character.isLetter(code)) {
if (wasLastInputTyping()
|| eventTime - mLastTypingTime < mStaticTimeThresholdAfterFastTyping) {
mLastLetterTypingTime = eventTime;
}
} else {
if (eventTime - mLastLetterTypingTime < mStaticTimeThresholdAfterFastTyping) {
// This non-letter typing should be treated as a part of fast typing.
recordLetterTyping(eventTime);
mLastLetterTypingTime = eventTime;
}
}
recordTyping(eventTime);
mLastTypingTime = eventTime;
}
public void onEndBatchInput(final long eventTime) {
recordGestureTyping(eventTime);
mLastBatchInputTime = eventTime;
}
public long getLastLetterTypingTime() {
@ -240,7 +225,7 @@ public final class PointerTracker implements PointerTrackerQueue.Element {
}
public boolean needsToSuppressKeyPreviewPopup(final long eventTime) {
return !isInTyping() && isInBatchInput()
return !wasLastInputTyping()
&& eventTime - mLastBatchInputTime < mSuppressKeyPreviewAfterBatchInputDuration;
}
}
@ -851,11 +836,13 @@ public final class PointerTracker implements PointerTrackerQueue.Element {
// Register move event on gesture tracker.
onGestureMoveEvent(x, y, eventTime, true /* isMajorEvent */, key);
if (sInGesture) {
mTimerProxy.cancelLongPressTimer();
mCurrentKey = null;
setReleasedKeyGraphics(oldKey);
return;
}
if (mGestureStrokeWithPreviewPoints.hasDetectedFastMove()) {
mTimerProxy.cancelLongPressTimer();
}
}
if (key != null) {

17
java/src/com/android/inputmethod/keyboard/internal/GestureStroke.java
View File

@ -190,8 +190,8 @@ public class GestureStroke {
return mParams.mDynamicTimeThresholdFrom - decayedThreshold;
}
public boolean isStartOfAGesture() {
if (mDetectFastMoveTime == 0) {
public final boolean isStartOfAGesture() {
if (!hasDetectedFastMove()) {
return false;
}
final int size = mEventTimes.getLength();
@ -200,6 +200,9 @@ public class GestureStroke {
}
final int lastIndex = size - 1;
final int deltaTime = mEventTimes.get(lastIndex) - mDetectFastMoveTime;
if (deltaTime < 0) {
return false;
}
final int deltaDistance = getDistance(
mXCoordinates.get(lastIndex), mYCoordinates.get(lastIndex),
mDetectFastMoveX, mDetectFastMoveY);
@ -240,6 +243,10 @@ public class GestureStroke {
mLastMajorEventY = y;
}
public final boolean hasDetectedFastMove() {
return mDetectFastMoveTime > 0;
}
private int detectFastMove(final int x, final int y, final int time) {
final int size = mEventTimes.getLength();
final int lastIndex = size - 1;
@ -255,7 +262,7 @@ public class GestureStroke {
Log.d(TAG, String.format("[%d] detectFastMove: speed=%5.2f", mPointerId, speed));
}
// Equivalent to (pixels / msecs < mStartSpeedThreshold / MSEC_PER_SEC)
if (mDetectFastMoveTime == 0 && pixelsPerSec > mDetectFastMoveSpeedThreshold * msecs) {
if (!hasDetectedFastMove() && pixelsPerSec > mDetectFastMoveSpeedThreshold * msecs) {
if (DEBUG) {
final float speed = (float)pixelsPerSec / msecs / mKeyWidth;
Log.d(TAG, String.format(
@ -306,11 +313,11 @@ public class GestureStroke {
return currentTime > lastRecognitionTime + mParams.mRecognitionMinimumTime;
}
public void appendAllBatchPoints(final InputPointers out) {
public final void appendAllBatchPoints(final InputPointers out) {
appendBatchPoints(out, mEventTimes.getLength());
}
public void appendIncrementalBatchPoints(final InputPointers out) {
public final void appendIncrementalBatchPoints(final InputPointers out) {
appendBatchPoints(out, mIncrementalRecognitionSize);
}