private void setContext(android.view.MotionEvent curr) { if (mCurrEvent != null) { mCurrEvent.recycle(); } mCurrEvent = android.view.MotionEvent.obtain(curr); mCurrLen = -1; mPrevLen = -1; mScaleFactor = -1; android.view.MotionEvent prev = mPrevEvent; int prevIndex0 = prev.findPointerIndex(mActiveId0); int prevIndex1 = prev.findPointerIndex(mActiveId1); int currIndex0 = curr.findPointerIndex(mActiveId0); int currIndex1 = curr.findPointerIndex(mActiveId1); if (prevIndex0 < 0 || prevIndex1 < 0 || currIndex0 < 0 || currIndex1 < 0) { mInvalidGesture = true; android.util.Log.e(TAG, "Invalid MotionEvent stream detected.", new System.Exception ()); if (mGestureInProgress) { mListener.onScaleEnd(this); } return; } float px0 = prev.getX(prevIndex0); float py0 = prev.getY(prevIndex0); float px1 = prev.getX(prevIndex1); float py1 = prev.getY(prevIndex1); float cx0 = curr.getX(currIndex0); float cy0 = curr.getY(currIndex0); float cx1 = curr.getX(currIndex1); float cy1 = curr.getY(currIndex1); float pvx = px1 - px0; float pvy = py1 - py0; float cvx = cx1 - cx0; float cvy = cy1 - cy0; mPrevFingerDiffX = pvx; mPrevFingerDiffY = pvy; mCurrFingerDiffX = cvx; mCurrFingerDiffY = cvy; mFocusX = cx0 + cvx * 0.5f; mFocusY = cy0 + cvy * 0.5f; mTimeDelta = curr.getEventTime() - prev.getEventTime(); mCurrPressure = curr.getPressure(currIndex0) + curr.getPressure(currIndex1); mPrevPressure = prev.getPressure(prevIndex0) + prev.getPressure(prevIndex1); }
private bool isConsideredDoubleTap(android.view.MotionEvent firstDown, android.view.MotionEvent firstUp, android.view.MotionEvent secondDown) { if (!mAlwaysInBiggerTapRegion) { return(false); } if (secondDown.getEventTime() - firstUp.getEventTime() > DOUBLE_TAP_TIMEOUT) { return(false); } int deltaX = (int)firstDown.getX() - (int)secondDown.getX(); int deltaY = (int)firstDown.getY() - (int)secondDown.getY(); return(deltaX * deltaX + deltaY * deltaY < mDoubleTapSlopSquare); }
/// <summary>Return the event time of the current event being processed.</summary> /// <remarks>Return the event time of the current event being processed.</remarks> /// <returns>Current event time in milliseconds.</returns> public virtual long getEventTime() { return(mCurrEvent.getEventTime()); }