| /* |
| * Copyright (C) 2009 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 android.gesture; |
| |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.graphics.Canvas; |
| import android.graphics.Paint; |
| import android.graphics.Path; |
| import android.graphics.Rect; |
| import android.graphics.RectF; |
| import android.util.AttributeSet; |
| import android.view.MotionEvent; |
| import android.view.animation.AnimationUtils; |
| import android.view.animation.AccelerateDecelerateInterpolator; |
| import android.widget.FrameLayout; |
| import android.os.SystemClock; |
| import android.annotation.Widget; |
| import com.android.internal.R; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * A transparent overlay for gesture input that can be placed on top of other |
| * widgets or contain other widgets. |
| * |
| * @attr ref android.R.styleable#GestureOverlayView_eventsInterceptionEnabled |
| * @attr ref android.R.styleable#GestureOverlayView_fadeDuration |
| * @attr ref android.R.styleable#GestureOverlayView_fadeOffset |
| * @attr ref android.R.styleable#GestureOverlayView_fadeEnabled |
| * @attr ref android.R.styleable#GestureOverlayView_gestureStrokeWidth |
| * @attr ref android.R.styleable#GestureOverlayView_gestureStrokeAngleThreshold |
| * @attr ref android.R.styleable#GestureOverlayView_gestureStrokeLengthThreshold |
| * @attr ref android.R.styleable#GestureOverlayView_gestureStrokeSquarenessThreshold |
| * @attr ref android.R.styleable#GestureOverlayView_gestureStrokeType |
| * @attr ref android.R.styleable#GestureOverlayView_gestureColor |
| * @attr ref android.R.styleable#GestureOverlayView_orientation |
| * @attr ref android.R.styleable#GestureOverlayView_uncertainGestureColor |
| */ |
| @Widget |
| public class GestureOverlayView extends FrameLayout { |
| public static final int GESTURE_STROKE_TYPE_SINGLE = 0; |
| public static final int GESTURE_STROKE_TYPE_MULTIPLE = 1; |
| |
| public static final int ORIENTATION_HORIZONTAL = 0; |
| public static final int ORIENTATION_VERTICAL = 1; |
| |
| private static final int FADE_ANIMATION_RATE = 16; |
| private static final boolean GESTURE_RENDERING_ANTIALIAS = true; |
| private static final boolean DITHER_FLAG = true; |
| |
| private final Paint mGesturePaint = new Paint(); |
| |
| private long mFadeDuration = 150; |
| private long mFadeOffset = 420; |
| private long mFadingStart; |
| private boolean mFadingHasStarted; |
| private boolean mFadeEnabled = true; |
| |
| private int mCurrentColor; |
| private int mCertainGestureColor = 0xFFFFFF00; |
| private int mUncertainGestureColor = 0x48FFFF00; |
| private float mGestureStrokeWidth = 12.0f; |
| private int mInvalidateExtraBorder = 10; |
| |
| private int mGestureStrokeType = GESTURE_STROKE_TYPE_SINGLE; |
| private float mGestureStrokeLengthThreshold = 50.0f; |
| private float mGestureStrokeSquarenessTreshold = 0.275f; |
| private float mGestureStrokeAngleThreshold = 40.0f; |
| |
| private int mOrientation = ORIENTATION_VERTICAL; |
| |
| private final Rect mInvalidRect = new Rect(); |
| private final Path mPath = new Path(); |
| private boolean mGestureVisible = true; |
| |
| private float mX; |
| private float mY; |
| |
| private float mCurveEndX; |
| private float mCurveEndY; |
| |
| private float mTotalLength; |
| private boolean mIsGesturing = false; |
| private boolean mPreviousWasGesturing = false; |
| private boolean mInterceptEvents = true; |
| private boolean mIsListeningForGestures; |
| private boolean mResetGesture; |
| |
| // current gesture |
| private Gesture mCurrentGesture; |
| private final ArrayList<GesturePoint> mStrokeBuffer = new ArrayList<GesturePoint>(100); |
| |
| // TODO: Make this a list of WeakReferences |
| private final ArrayList<OnGestureListener> mOnGestureListeners = |
| new ArrayList<OnGestureListener>(); |
| // TODO: Make this a list of WeakReferences |
| private final ArrayList<OnGesturePerformedListener> mOnGesturePerformedListeners = |
| new ArrayList<OnGesturePerformedListener>(); |
| // TODO: Make this a list of WeakReferences |
| private final ArrayList<OnGesturingListener> mOnGesturingListeners = |
| new ArrayList<OnGesturingListener>(); |
| |
| private boolean mHandleGestureActions; |
| |
| // fading out effect |
| private boolean mIsFadingOut = false; |
| private float mFadingAlpha = 1.0f; |
| private final AccelerateDecelerateInterpolator mInterpolator = |
| new AccelerateDecelerateInterpolator(); |
| |
| private final FadeOutRunnable mFadingOut = new FadeOutRunnable(); |
| |
| public GestureOverlayView(Context context) { |
| super(context); |
| init(); |
| } |
| |
| public GestureOverlayView(Context context, AttributeSet attrs) { |
| this(context, attrs, com.android.internal.R.attr.gestureOverlayViewStyle); |
| } |
| |
| public GestureOverlayView(Context context, AttributeSet attrs, int defStyleAttr) { |
| this(context, attrs, defStyleAttr, 0); |
| } |
| |
| public GestureOverlayView( |
| Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { |
| super(context, attrs, defStyleAttr, defStyleRes); |
| |
| final TypedArray a = context.obtainStyledAttributes( |
| attrs, R.styleable.GestureOverlayView, defStyleAttr, defStyleRes); |
| |
| mGestureStrokeWidth = a.getFloat(R.styleable.GestureOverlayView_gestureStrokeWidth, |
| mGestureStrokeWidth); |
| mInvalidateExtraBorder = Math.max(1, ((int) mGestureStrokeWidth) - 1); |
| mCertainGestureColor = a.getColor(R.styleable.GestureOverlayView_gestureColor, |
| mCertainGestureColor); |
| mUncertainGestureColor = a.getColor(R.styleable.GestureOverlayView_uncertainGestureColor, |
| mUncertainGestureColor); |
| mFadeDuration = a.getInt(R.styleable.GestureOverlayView_fadeDuration, (int) mFadeDuration); |
| mFadeOffset = a.getInt(R.styleable.GestureOverlayView_fadeOffset, (int) mFadeOffset); |
| mGestureStrokeType = a.getInt(R.styleable.GestureOverlayView_gestureStrokeType, |
| mGestureStrokeType); |
| mGestureStrokeLengthThreshold = a.getFloat( |
| R.styleable.GestureOverlayView_gestureStrokeLengthThreshold, |
| mGestureStrokeLengthThreshold); |
| mGestureStrokeAngleThreshold = a.getFloat( |
| R.styleable.GestureOverlayView_gestureStrokeAngleThreshold, |
| mGestureStrokeAngleThreshold); |
| mGestureStrokeSquarenessTreshold = a.getFloat( |
| R.styleable.GestureOverlayView_gestureStrokeSquarenessThreshold, |
| mGestureStrokeSquarenessTreshold); |
| mInterceptEvents = a.getBoolean(R.styleable.GestureOverlayView_eventsInterceptionEnabled, |
| mInterceptEvents); |
| mFadeEnabled = a.getBoolean(R.styleable.GestureOverlayView_fadeEnabled, |
| mFadeEnabled); |
| mOrientation = a.getInt(R.styleable.GestureOverlayView_orientation, mOrientation); |
| |
| a.recycle(); |
| |
| init(); |
| } |
| |
| private void init() { |
| setWillNotDraw(false); |
| |
| final Paint gesturePaint = mGesturePaint; |
| gesturePaint.setAntiAlias(GESTURE_RENDERING_ANTIALIAS); |
| gesturePaint.setColor(mCertainGestureColor); |
| gesturePaint.setStyle(Paint.Style.STROKE); |
| gesturePaint.setStrokeJoin(Paint.Join.ROUND); |
| gesturePaint.setStrokeCap(Paint.Cap.ROUND); |
| gesturePaint.setStrokeWidth(mGestureStrokeWidth); |
| gesturePaint.setDither(DITHER_FLAG); |
| |
| mCurrentColor = mCertainGestureColor; |
| setPaintAlpha(255); |
| } |
| |
| public ArrayList<GesturePoint> getCurrentStroke() { |
| return mStrokeBuffer; |
| } |
| |
| public int getOrientation() { |
| return mOrientation; |
| } |
| |
| public void setOrientation(int orientation) { |
| mOrientation = orientation; |
| } |
| |
| public void setGestureColor(int color) { |
| mCertainGestureColor = color; |
| } |
| |
| public void setUncertainGestureColor(int color) { |
| mUncertainGestureColor = color; |
| } |
| |
| public int getUncertainGestureColor() { |
| return mUncertainGestureColor; |
| } |
| |
| public int getGestureColor() { |
| return mCertainGestureColor; |
| } |
| |
| public float getGestureStrokeWidth() { |
| return mGestureStrokeWidth; |
| } |
| |
| public void setGestureStrokeWidth(float gestureStrokeWidth) { |
| mGestureStrokeWidth = gestureStrokeWidth; |
| mInvalidateExtraBorder = Math.max(1, ((int) gestureStrokeWidth) - 1); |
| mGesturePaint.setStrokeWidth(gestureStrokeWidth); |
| } |
| |
| public int getGestureStrokeType() { |
| return mGestureStrokeType; |
| } |
| |
| public void setGestureStrokeType(int gestureStrokeType) { |
| mGestureStrokeType = gestureStrokeType; |
| } |
| |
| public float getGestureStrokeLengthThreshold() { |
| return mGestureStrokeLengthThreshold; |
| } |
| |
| public void setGestureStrokeLengthThreshold(float gestureStrokeLengthThreshold) { |
| mGestureStrokeLengthThreshold = gestureStrokeLengthThreshold; |
| } |
| |
| public float getGestureStrokeSquarenessTreshold() { |
| return mGestureStrokeSquarenessTreshold; |
| } |
| |
| public void setGestureStrokeSquarenessTreshold(float gestureStrokeSquarenessTreshold) { |
| mGestureStrokeSquarenessTreshold = gestureStrokeSquarenessTreshold; |
| } |
| |
| public float getGestureStrokeAngleThreshold() { |
| return mGestureStrokeAngleThreshold; |
| } |
| |
| public void setGestureStrokeAngleThreshold(float gestureStrokeAngleThreshold) { |
| mGestureStrokeAngleThreshold = gestureStrokeAngleThreshold; |
| } |
| |
| public boolean isEventsInterceptionEnabled() { |
| return mInterceptEvents; |
| } |
| |
| public void setEventsInterceptionEnabled(boolean enabled) { |
| mInterceptEvents = enabled; |
| } |
| |
| public boolean isFadeEnabled() { |
| return mFadeEnabled; |
| } |
| |
| public void setFadeEnabled(boolean fadeEnabled) { |
| mFadeEnabled = fadeEnabled; |
| } |
| |
| public Gesture getGesture() { |
| return mCurrentGesture; |
| } |
| |
| public void setGesture(Gesture gesture) { |
| if (mCurrentGesture != null) { |
| clear(false); |
| } |
| |
| setCurrentColor(mCertainGestureColor); |
| mCurrentGesture = gesture; |
| |
| final Path path = mCurrentGesture.toPath(); |
| final RectF bounds = new RectF(); |
| path.computeBounds(bounds, true); |
| |
| // TODO: The path should also be scaled to fit inside this view |
| mPath.rewind(); |
| mPath.addPath(path, -bounds.left + (getWidth() - bounds.width()) / 2.0f, |
| -bounds.top + (getHeight() - bounds.height()) / 2.0f); |
| |
| mResetGesture = true; |
| |
| invalidate(); |
| } |
| |
| public Path getGesturePath() { |
| return mPath; |
| } |
| |
| public Path getGesturePath(Path path) { |
| path.set(mPath); |
| return path; |
| } |
| |
| public boolean isGestureVisible() { |
| return mGestureVisible; |
| } |
| |
| public void setGestureVisible(boolean visible) { |
| mGestureVisible = visible; |
| } |
| |
| public long getFadeOffset() { |
| return mFadeOffset; |
| } |
| |
| public void setFadeOffset(long fadeOffset) { |
| mFadeOffset = fadeOffset; |
| } |
| |
| public void addOnGestureListener(OnGestureListener listener) { |
| mOnGestureListeners.add(listener); |
| } |
| |
| public void removeOnGestureListener(OnGestureListener listener) { |
| mOnGestureListeners.remove(listener); |
| } |
| |
| public void removeAllOnGestureListeners() { |
| mOnGestureListeners.clear(); |
| } |
| |
| public void addOnGesturePerformedListener(OnGesturePerformedListener listener) { |
| mOnGesturePerformedListeners.add(listener); |
| if (mOnGesturePerformedListeners.size() > 0) { |
| mHandleGestureActions = true; |
| } |
| } |
| |
| public void removeOnGesturePerformedListener(OnGesturePerformedListener listener) { |
| mOnGesturePerformedListeners.remove(listener); |
| if (mOnGesturePerformedListeners.size() <= 0) { |
| mHandleGestureActions = false; |
| } |
| } |
| |
| public void removeAllOnGesturePerformedListeners() { |
| mOnGesturePerformedListeners.clear(); |
| mHandleGestureActions = false; |
| } |
| |
| public void addOnGesturingListener(OnGesturingListener listener) { |
| mOnGesturingListeners.add(listener); |
| } |
| |
| public void removeOnGesturingListener(OnGesturingListener listener) { |
| mOnGesturingListeners.remove(listener); |
| } |
| |
| public void removeAllOnGesturingListeners() { |
| mOnGesturingListeners.clear(); |
| } |
| |
| public boolean isGesturing() { |
| return mIsGesturing; |
| } |
| |
| private void setCurrentColor(int color) { |
| mCurrentColor = color; |
| if (mFadingHasStarted) { |
| setPaintAlpha((int) (255 * mFadingAlpha)); |
| } else { |
| setPaintAlpha(255); |
| } |
| invalidate(); |
| } |
| |
| /** |
| * @hide |
| */ |
| public Paint getGesturePaint() { |
| return mGesturePaint; |
| } |
| |
| @Override |
| public void draw(Canvas canvas) { |
| super.draw(canvas); |
| |
| if (mCurrentGesture != null && mGestureVisible) { |
| canvas.drawPath(mPath, mGesturePaint); |
| } |
| } |
| |
| private void setPaintAlpha(int alpha) { |
| alpha += alpha >> 7; |
| final int baseAlpha = mCurrentColor >>> 24; |
| final int useAlpha = baseAlpha * alpha >> 8; |
| mGesturePaint.setColor((mCurrentColor << 8 >>> 8) | (useAlpha << 24)); |
| } |
| |
| public void clear(boolean animated) { |
| clear(animated, false, true); |
| } |
| |
| private void clear(boolean animated, boolean fireActionPerformed, boolean immediate) { |
| setPaintAlpha(255); |
| removeCallbacks(mFadingOut); |
| mResetGesture = false; |
| mFadingOut.fireActionPerformed = fireActionPerformed; |
| mFadingOut.resetMultipleStrokes = false; |
| |
| if (animated && mCurrentGesture != null) { |
| mFadingAlpha = 1.0f; |
| mIsFadingOut = true; |
| mFadingHasStarted = false; |
| mFadingStart = AnimationUtils.currentAnimationTimeMillis() + mFadeOffset; |
| |
| postDelayed(mFadingOut, mFadeOffset); |
| } else { |
| mFadingAlpha = 1.0f; |
| mIsFadingOut = false; |
| mFadingHasStarted = false; |
| |
| if (immediate) { |
| mCurrentGesture = null; |
| mPath.rewind(); |
| invalidate(); |
| } else if (fireActionPerformed) { |
| postDelayed(mFadingOut, mFadeOffset); |
| } else if (mGestureStrokeType == GESTURE_STROKE_TYPE_MULTIPLE) { |
| mFadingOut.resetMultipleStrokes = true; |
| postDelayed(mFadingOut, mFadeOffset); |
| } else { |
| mCurrentGesture = null; |
| mPath.rewind(); |
| invalidate(); |
| } |
| } |
| } |
| |
| public void cancelClearAnimation() { |
| setPaintAlpha(255); |
| mIsFadingOut = false; |
| mFadingHasStarted = false; |
| removeCallbacks(mFadingOut); |
| mPath.rewind(); |
| mCurrentGesture = null; |
| } |
| |
| public void cancelGesture() { |
| mIsListeningForGestures = false; |
| |
| // add the stroke to the current gesture |
| mCurrentGesture.addStroke(new GestureStroke(mStrokeBuffer)); |
| |
| // pass the event to handlers |
| final long now = SystemClock.uptimeMillis(); |
| final MotionEvent event = MotionEvent.obtain(now, now, |
| MotionEvent.ACTION_CANCEL, 0.0f, 0.0f, 0); |
| |
| final ArrayList<OnGestureListener> listeners = mOnGestureListeners; |
| int count = listeners.size(); |
| for (int i = 0; i < count; i++) { |
| listeners.get(i).onGestureCancelled(this, event); |
| } |
| |
| event.recycle(); |
| |
| clear(false); |
| mIsGesturing = false; |
| mPreviousWasGesturing = false; |
| mStrokeBuffer.clear(); |
| |
| final ArrayList<OnGesturingListener> otherListeners = mOnGesturingListeners; |
| count = otherListeners.size(); |
| for (int i = 0; i < count; i++) { |
| otherListeners.get(i).onGesturingEnded(this); |
| } |
| } |
| |
| @Override |
| protected void onDetachedFromWindow() { |
| super.onDetachedFromWindow(); |
| cancelClearAnimation(); |
| } |
| |
| @Override |
| public boolean dispatchTouchEvent(MotionEvent event) { |
| if (isEnabled()) { |
| final boolean cancelDispatch = (mIsGesturing || (mCurrentGesture != null && |
| mCurrentGesture.getStrokesCount() > 0 && mPreviousWasGesturing)) && |
| mInterceptEvents; |
| |
| processEvent(event); |
| |
| if (cancelDispatch) { |
| event.setAction(MotionEvent.ACTION_CANCEL); |
| } |
| |
| super.dispatchTouchEvent(event); |
| |
| return true; |
| } |
| |
| return super.dispatchTouchEvent(event); |
| } |
| |
| private boolean processEvent(MotionEvent event) { |
| switch (event.getAction()) { |
| case MotionEvent.ACTION_DOWN: |
| touchDown(event); |
| invalidate(); |
| return true; |
| case MotionEvent.ACTION_MOVE: |
| if (mIsListeningForGestures) { |
| Rect rect = touchMove(event); |
| if (rect != null) { |
| invalidate(rect); |
| } |
| return true; |
| } |
| break; |
| case MotionEvent.ACTION_UP: |
| if (mIsListeningForGestures) { |
| touchUp(event, false); |
| invalidate(); |
| return true; |
| } |
| break; |
| case MotionEvent.ACTION_CANCEL: |
| if (mIsListeningForGestures) { |
| touchUp(event, true); |
| invalidate(); |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| private void touchDown(MotionEvent event) { |
| mIsListeningForGestures = true; |
| |
| float x = event.getX(); |
| float y = event.getY(); |
| |
| mX = x; |
| mY = y; |
| |
| mTotalLength = 0; |
| mIsGesturing = false; |
| |
| if (mGestureStrokeType == GESTURE_STROKE_TYPE_SINGLE || mResetGesture) { |
| if (mHandleGestureActions) setCurrentColor(mUncertainGestureColor); |
| mResetGesture = false; |
| mCurrentGesture = null; |
| mPath.rewind(); |
| } else if (mCurrentGesture == null || mCurrentGesture.getStrokesCount() == 0) { |
| if (mHandleGestureActions) setCurrentColor(mUncertainGestureColor); |
| } |
| |
| // if there is fading out going on, stop it. |
| if (mFadingHasStarted) { |
| cancelClearAnimation(); |
| } else if (mIsFadingOut) { |
| setPaintAlpha(255); |
| mIsFadingOut = false; |
| mFadingHasStarted = false; |
| removeCallbacks(mFadingOut); |
| } |
| |
| if (mCurrentGesture == null) { |
| mCurrentGesture = new Gesture(); |
| } |
| |
| mStrokeBuffer.add(new GesturePoint(x, y, event.getEventTime())); |
| mPath.moveTo(x, y); |
| |
| final int border = mInvalidateExtraBorder; |
| mInvalidRect.set((int) x - border, (int) y - border, (int) x + border, (int) y + border); |
| |
| mCurveEndX = x; |
| mCurveEndY = y; |
| |
| // pass the event to handlers |
| final ArrayList<OnGestureListener> listeners = mOnGestureListeners; |
| final int count = listeners.size(); |
| for (int i = 0; i < count; i++) { |
| listeners.get(i).onGestureStarted(this, event); |
| } |
| } |
| |
| private Rect touchMove(MotionEvent event) { |
| Rect areaToRefresh = null; |
| |
| final float x = event.getX(); |
| final float y = event.getY(); |
| |
| final float previousX = mX; |
| final float previousY = mY; |
| |
| final float dx = Math.abs(x - previousX); |
| final float dy = Math.abs(y - previousY); |
| |
| if (dx >= GestureStroke.TOUCH_TOLERANCE || dy >= GestureStroke.TOUCH_TOLERANCE) { |
| areaToRefresh = mInvalidRect; |
| |
| // start with the curve end |
| final int border = mInvalidateExtraBorder; |
| areaToRefresh.set((int) mCurveEndX - border, (int) mCurveEndY - border, |
| (int) mCurveEndX + border, (int) mCurveEndY + border); |
| |
| float cX = mCurveEndX = (x + previousX) / 2; |
| float cY = mCurveEndY = (y + previousY) / 2; |
| |
| mPath.quadTo(previousX, previousY, cX, cY); |
| |
| // union with the control point of the new curve |
| areaToRefresh.union((int) previousX - border, (int) previousY - border, |
| (int) previousX + border, (int) previousY + border); |
| |
| // union with the end point of the new curve |
| areaToRefresh.union((int) cX - border, (int) cY - border, |
| (int) cX + border, (int) cY + border); |
| |
| mX = x; |
| mY = y; |
| |
| mStrokeBuffer.add(new GesturePoint(x, y, event.getEventTime())); |
| |
| if (mHandleGestureActions && !mIsGesturing) { |
| mTotalLength += (float) Math.sqrt(dx * dx + dy * dy); |
| |
| if (mTotalLength > mGestureStrokeLengthThreshold) { |
| final OrientedBoundingBox box = |
| GestureUtils.computeOrientedBoundingBox(mStrokeBuffer); |
| |
| float angle = Math.abs(box.orientation); |
| if (angle > 90) { |
| angle = 180 - angle; |
| } |
| |
| if (box.squareness > mGestureStrokeSquarenessTreshold || |
| (mOrientation == ORIENTATION_VERTICAL ? |
| angle < mGestureStrokeAngleThreshold : |
| angle > mGestureStrokeAngleThreshold)) { |
| |
| mIsGesturing = true; |
| setCurrentColor(mCertainGestureColor); |
| |
| final ArrayList<OnGesturingListener> listeners = mOnGesturingListeners; |
| int count = listeners.size(); |
| for (int i = 0; i < count; i++) { |
| listeners.get(i).onGesturingStarted(this); |
| } |
| } |
| } |
| } |
| |
| // pass the event to handlers |
| final ArrayList<OnGestureListener> listeners = mOnGestureListeners; |
| final int count = listeners.size(); |
| for (int i = 0; i < count; i++) { |
| listeners.get(i).onGesture(this, event); |
| } |
| } |
| |
| return areaToRefresh; |
| } |
| |
| private void touchUp(MotionEvent event, boolean cancel) { |
| mIsListeningForGestures = false; |
| |
| // A gesture wasn't started or was cancelled |
| if (mCurrentGesture != null) { |
| // add the stroke to the current gesture |
| mCurrentGesture.addStroke(new GestureStroke(mStrokeBuffer)); |
| |
| if (!cancel) { |
| // pass the event to handlers |
| final ArrayList<OnGestureListener> listeners = mOnGestureListeners; |
| int count = listeners.size(); |
| for (int i = 0; i < count; i++) { |
| listeners.get(i).onGestureEnded(this, event); |
| } |
| |
| clear(mHandleGestureActions && mFadeEnabled, mHandleGestureActions && mIsGesturing, |
| false); |
| } else { |
| cancelGesture(event); |
| |
| } |
| } else { |
| cancelGesture(event); |
| } |
| |
| mStrokeBuffer.clear(); |
| mPreviousWasGesturing = mIsGesturing; |
| mIsGesturing = false; |
| |
| final ArrayList<OnGesturingListener> listeners = mOnGesturingListeners; |
| int count = listeners.size(); |
| for (int i = 0; i < count; i++) { |
| listeners.get(i).onGesturingEnded(this); |
| } |
| } |
| |
| private void cancelGesture(MotionEvent event) { |
| // pass the event to handlers |
| final ArrayList<OnGestureListener> listeners = mOnGestureListeners; |
| final int count = listeners.size(); |
| for (int i = 0; i < count; i++) { |
| listeners.get(i).onGestureCancelled(this, event); |
| } |
| |
| clear(false); |
| } |
| |
| private void fireOnGesturePerformed() { |
| final ArrayList<OnGesturePerformedListener> actionListeners = mOnGesturePerformedListeners; |
| final int count = actionListeners.size(); |
| for (int i = 0; i < count; i++) { |
| actionListeners.get(i).onGesturePerformed(GestureOverlayView.this, mCurrentGesture); |
| } |
| } |
| |
| private class FadeOutRunnable implements Runnable { |
| boolean fireActionPerformed; |
| boolean resetMultipleStrokes; |
| |
| public void run() { |
| if (mIsFadingOut) { |
| final long now = AnimationUtils.currentAnimationTimeMillis(); |
| final long duration = now - mFadingStart; |
| |
| if (duration > mFadeDuration) { |
| if (fireActionPerformed) { |
| fireOnGesturePerformed(); |
| } |
| |
| mPreviousWasGesturing = false; |
| mIsFadingOut = false; |
| mFadingHasStarted = false; |
| mPath.rewind(); |
| mCurrentGesture = null; |
| setPaintAlpha(255); |
| } else { |
| mFadingHasStarted = true; |
| float interpolatedTime = Math.max(0.0f, |
| Math.min(1.0f, duration / (float) mFadeDuration)); |
| mFadingAlpha = 1.0f - mInterpolator.getInterpolation(interpolatedTime); |
| setPaintAlpha((int) (255 * mFadingAlpha)); |
| postDelayed(this, FADE_ANIMATION_RATE); |
| } |
| } else if (resetMultipleStrokes) { |
| mResetGesture = true; |
| } else { |
| fireOnGesturePerformed(); |
| |
| mFadingHasStarted = false; |
| mPath.rewind(); |
| mCurrentGesture = null; |
| mPreviousWasGesturing = false; |
| setPaintAlpha(255); |
| } |
| |
| invalidate(); |
| } |
| } |
| |
| public static interface OnGesturingListener { |
| void onGesturingStarted(GestureOverlayView overlay); |
| |
| void onGesturingEnded(GestureOverlayView overlay); |
| } |
| |
| public static interface OnGestureListener { |
| void onGestureStarted(GestureOverlayView overlay, MotionEvent event); |
| |
| void onGesture(GestureOverlayView overlay, MotionEvent event); |
| |
| void onGestureEnded(GestureOverlayView overlay, MotionEvent event); |
| |
| void onGestureCancelled(GestureOverlayView overlay, MotionEvent event); |
| } |
| |
| public static interface OnGesturePerformedListener { |
| void onGesturePerformed(GestureOverlayView overlay, Gesture gesture); |
| } |
| } |