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Move key hysteresis distance parameter to KeyDetector class 

Bug: 4768084
Change-Id: Ib8771afd7363a4a5590b2b4a586e3014c026be34
main
Tadashi G. Takaoka 2011-07-04 19:59:57 +09:00
parent 5f6816fa8b
commit a19b84dcf6
8 changed files with 41 additions and 24 deletions
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3
java/res/values/attrs.xml
View File

@ -89,9 +89,6 @@
<!-- Size of the text for key press feedback popup, int the proportion of key height -->
<attr name="keyPreviewTextRatio" format="float" />
<!-- Hysteresis distance for key debouncing -->
<attr name="keyHysteresisDistance" format="dimension" />
<!-- Amount to offset the touch Y coordinate by, for bias correction. -->
<attr name="verticalCorrection" format="dimension" />

2
java/res/values/styles.xml
View File

@ -62,7 +62,6 @@
<item name="keyPreviewHeight">@dimen/key_preview_height</item>
<item name="keyPreviewTextRatio">@fraction/key_preview_text_ratio</item>
<item name="popupLayout">@layout/keyboard_popup</item>
<item name="keyHysteresisDistance">@dimen/key_hysteresis_distance</item>
<item name="verticalCorrection">@dimen/keyboard_vertical_correction</item>
<item name="shadowColor">#BB000000</item>
<item name="shadowRadius">2.75</item>
@ -70,7 +69,6 @@
</style>
<style name="PopupMiniKeyboardView" parent="KeyboardView">
<item name="keyBackground">@drawable/btn_keyboard_key_popup</item>
<item name="keyHysteresisDistance">0dip</item>
<item name="verticalCorrection">@dimen/mini_keyboard_vertical_correction</item>
</style>
<style name="PopupMiniKeyboardPanelStyle">

18
java/src/com/android/inputmethod/keyboard/KeyDetector.java
View File

@ -28,6 +28,8 @@ public class KeyDetector {
public static final int NOT_A_CODE = -1;
public static final int NOT_A_KEY = -1;
private final int mKeyHysteresisDistanceSquared;
private Keyboard mKeyboard;
private int mCorrectionX;
private int mCorrectionY;
@ -39,12 +41,28 @@ public class KeyDetector {
private final int[] mDistances = new int[MAX_NEARBY_KEYS];
private final int[] mIndices = new int[MAX_NEARBY_KEYS];
/**
* This class handles key detection.
*
* @param keyHysteresisDistance if the pointer movement distance is smaller than this, the
* movement will not been handled as meaningful movement. The unit is pixel.
*/
public KeyDetector(float keyHysteresisDistance) {
mKeyHysteresisDistanceSquared = (int)(keyHysteresisDistance * keyHysteresisDistance);
}
public void setKeyboard(Keyboard keyboard, float correctionX, float correctionY) {
if (keyboard == null)
throw new NullPointerException();
mCorrectionX = (int)correctionX;
mCorrectionY = (int)correctionY;
mKeyboard = keyboard;
final int threshold = keyboard.getMostCommonKeyWidth();
mProximityThresholdSquare = threshold * threshold;
}
public int getKeyHysteresisDistanceSquared() {
return mKeyHysteresisDistanceSquared;
}
protected int getTouchX(int x) {

11
java/src/com/android/inputmethod/keyboard/LatinKeyboardBaseView.java
View File

@ -59,7 +59,6 @@ public class LatinKeyboardBaseView extends KeyboardView {
private final int mKeyRepeatInterval;
// XML attribute
private final float mKeyHysteresisDistance;
private final float mVerticalCorrection;
private final int mPopupLayout;
@ -81,7 +80,7 @@ public class LatinKeyboardBaseView extends KeyboardView {
private int mOldPointerCount = 1;
private int mOldKeyIndex;
protected KeyDetector mKeyDetector = new KeyDetector();
protected KeyDetector mKeyDetector;
// Swipe gesture detector
protected GestureDetector mGestureDetector;
@ -182,8 +181,6 @@ public class LatinKeyboardBaseView extends KeyboardView {
final TypedArray a = context.obtainStyledAttributes(
attrs, R.styleable.KeyboardView, defStyle, R.style.KeyboardView);
mKeyHysteresisDistance = a.getDimensionPixelOffset(
R.styleable.KeyboardView_keyHysteresisDistance, 0);
mVerticalCorrection = a.getDimensionPixelOffset(
R.styleable.KeyboardView_verticalCorrection, 0);
@ -193,6 +190,8 @@ public class LatinKeyboardBaseView extends KeyboardView {
final Resources res = getResources();
final float keyHysteresisDistance = res.getDimension(R.dimen.key_hysteresis_distance);
mKeyDetector = new KeyDetector(keyHysteresisDistance);
mSwipeThreshold = (int) (500 * res.getDisplayMetrics().density);
// TODO: Refer to frameworks/base/core/res/res/values/config.xml
mDisambiguateSwipe = res.getBoolean(R.bool.config_swipeDisambiguation);
@ -309,7 +308,7 @@ public class LatinKeyboardBaseView extends KeyboardView {
mKeyDetector.setKeyboard(keyboard, -getPaddingLeft(),
-getPaddingTop() + mVerticalCorrection);
for (PointerTracker tracker : mPointerTrackers) {
tracker.setKeyboard(keyboard, mKeyHysteresisDistance);
tracker.setKeyboard(keyboard, mKeyDetector);
}
mKeyDetector.setProximityThreshold(keyboard.getMostCommonKeyWidth());
mPopupPanelCache.clear();
@ -484,7 +483,7 @@ public class LatinKeyboardBaseView extends KeyboardView {
final PointerTracker tracker =
new PointerTracker(i, this, mHandler, mKeyDetector, this);
if (keyboard != null)
tracker.setKeyboard(keyboard, mKeyHysteresisDistance);
tracker.setKeyboard(keyboard, mKeyDetector);
if (listener != null)
tracker.setOnKeyboardActionListener(listener);
pointers.add(tracker);

2
java/src/com/android/inputmethod/keyboard/MiniKeyboardKeyDetector.java
View File

@ -23,7 +23,7 @@ public class MiniKeyboardKeyDetector extends KeyDetector {
private final int mSlideAllowanceSquareTop;
public MiniKeyboardKeyDetector(float slideAllowance) {
super();
super(/* keyHysteresisDistance */0);
mSlideAllowanceSquare = (int)(slideAllowance * slideAllowance);
// Top slide allowance is slightly longer (sqrt(2) times) than other edges.
mSlideAllowanceSquareTop = mSlideAllowanceSquare * 2;

19
java/src/com/android/inputmethod/keyboard/PointerTracker.java
View File

@ -56,7 +56,7 @@ public class PointerTracker {
private final LatinKeyboardBaseView mKeyboardView;
private final UIProxy mProxy;
private final UIHandler mHandler;
private final KeyDetector mKeyDetector;
private KeyDetector mKeyDetector;
private KeyboardActionListener mListener = EMPTY_LISTENER;
private final KeyboardSwitcher mKeyboardSwitcher;
private final boolean mHasDistinctMultitouch;
@ -67,7 +67,6 @@ public class PointerTracker {
private Keyboard mKeyboard;
private List<Key> mKeys;
private int mKeyHysteresisDistanceSquared = -1;
private int mKeyQuarterWidthSquared;
private final PointerTrackerKeyState mKeyState;
@ -198,12 +197,13 @@ public class PointerTracker {
mListener.onCancelInput();
}
public void setKeyboard(Keyboard keyboard, float keyHysteresisDistance) {
if (keyboard == null || keyHysteresisDistance < 0)
throw new IllegalArgumentException();
public void setKeyboard(Keyboard keyboard, KeyDetector keyDetector) {
if (keyboard == null || keyDetector == null)
throw new NullPointerException();
mKeyboard = keyboard;
mKeys = keyboard.getKeys();
mKeyHysteresisDistanceSquared = (int)(keyHysteresisDistance * keyHysteresisDistance);
mKeyDetector = keyDetector;
mKeyState.setKeyDetector(keyDetector);
final int keyQuarterWidth = keyboard.getKeyWidth() / 4;
mKeyQuarterWidthSquared = keyQuarterWidth * keyQuarterWidth;
// Mark that keyboard layout has been changed.
@ -602,13 +602,14 @@ public class PointerTracker {
}
private boolean isMajorEnoughMoveToBeOnNewKey(int x, int y, int newKey) {
if (mKeys == null || mKeyHysteresisDistanceSquared < 0)
throw new IllegalStateException("keyboard and/or hysteresis not set");
if (mKeys == null || mKeyDetector == null)
throw new NullPointerException("keyboard and/or key detector not set");
int curKey = mKeyState.getKeyIndex();
if (newKey == curKey) {
return false;
} else if (isValidKeyIndex(curKey)) {
return mKeys.get(curKey).squaredDistanceToEdge(x, y) >= mKeyHysteresisDistanceSquared;
return mKeys.get(curKey).squaredDistanceToEdge(x, y)
>= mKeyDetector.getKeyHysteresisDistanceSquared();
} else {
return true;
}

6
java/src/com/android/inputmethod/keyboard/internal/PointerTrackerKeyState.java
View File

@ -23,7 +23,7 @@ import com.android.inputmethod.keyboard.PointerTracker;
* This class keeps track of a key index and a position where {@link PointerTracker} is.
*/
public class PointerTrackerKeyState {
private final KeyDetector mKeyDetector;
private KeyDetector mKeyDetector;
// The position and time at which first down event occurred.
private long mDownTime;
@ -43,6 +43,10 @@ public class PointerTrackerKeyState {
mKeyDetector = keyDetecor;
}
public void setKeyDetector(KeyDetector keyDetector) {
mKeyDetector = keyDetector;
}
public int getKeyIndex() {
return mKeyIndex;
}

4
tests/src/com/android/inputmethod/latin/SuggestHelper.java
View File

@ -37,7 +37,7 @@ public class SuggestHelper {
// (and not try to find a dictionary provider for a specified locale)
mSuggest = new Suggest(context, dictionaryId, null);
mKeyboard = new LatinKeyboard(context, keyboardId, keyboardId.mWidth);
mKeyDetector = new KeyDetector();
mKeyDetector = new KeyDetector(0);
init();
}
@ -45,7 +45,7 @@ public class SuggestHelper {
KeyboardId keyboardId) {
mSuggest = new Suggest(context, dictionaryPath, startOffset, length, null);
mKeyboard = new LatinKeyboard(context, keyboardId, keyboardId.mWidth);
mKeyDetector = new KeyDetector();
mKeyDetector = new KeyDetector(0);
init();
}