/** * Check if we've crossed a reasonable touch slop for the given child view. * If the child cannot be dragged along the horizontal or vertical axis, motion * along that axis will not count toward the slop check. * * @param child Child to check * @param dx Motion since initial position along X axis * @param dy Motion since initial position along Y axis * @return true if the touch slop has been crossed */ private boolean checkTouchSlop(View child, float dx, float dy) { if (child == null) { return false; } final boolean checkHorizontal = mCallback.getViewHorizontalDragRange(child) > 0; final boolean checkVertical = mCallback.getViewVerticalDragRange(child) > 0; if (checkHorizontal && checkVertical) { return dx * dx + dy * dy > mTouchSlop * mTouchSlop; } else if (checkHorizontal) { return Math.abs(dx) > mTouchSlop; } else if (checkVertical) { return Math.abs(dy) > mTouchSlop; } return false; }
private int computeSettleDuration(View child, int dx, int dy, int xvel, int yvel) { xvel = clampMag(xvel, (int) mMinVelocity, (int) mMaxVelocity); yvel = clampMag(yvel, (int) mMinVelocity, (int) mMaxVelocity); final int absDx = Math.abs(dx); final int absDy = Math.abs(dy); final int absXVel = Math.abs(xvel); final int absYVel = Math.abs(yvel); final int addedVel = absXVel + absYVel; final int addedDistance = absDx + absDy; final float xweight = xvel != 0 ? (float) absXVel / addedVel : (float) absDx / addedDistance; final float yweight = yvel != 0 ? (float) absYVel / addedVel : (float) absDy / addedDistance; int xduration = computeAxisDuration(dx, xvel, mCallback.getViewHorizontalDragRange(child)); int yduration = computeAxisDuration(dy, yvel, mCallback.getViewVerticalDragRange(child)); return (int) (xduration * xweight + yduration * yweight); }
/** * Check if we've crossed a reasonable touch slop for the given child view. * If the child cannot be dragged along the horizontal or vertical axis, motion * along that axis will not count toward the slop check. * * @param child Child to check * @param dx Motion since initial position along X axis * @param dy Motion since initial position along Y axis * @return true if the touch slop has been crossed */ private boolean checkTouchSlop(View child, float dx, float dy) { if (child == null) { return false; } final boolean checkHorizontal = mCallback.getViewHorizontalDragRange(child) > 0; final boolean checkVertical = mCallback.getViewVerticalDragRange(child) > 0; if (checkHorizontal && checkVertical) { return dx * dx + dy * dy > mTouchSlop * mTouchSlop; } else if (checkHorizontal) { return Math.abs(dx) > mTouchSlop; } else if (checkVertical) { return Math.abs(dy) > mTouchSlop; } return false; }
/** * Check if we've crossed a reasonable touch slop for the given child view. * If the child cannot be dragged along the horizontal or vertical axis, motion * along that axis will not count toward the slop check. * * @param child Child to check * @param dx Motion since initial position along X axis * @param dy Motion since initial position along Y axis * @return true if the touch slop has been crossed */ private boolean checkTouchSlop(View child, float dx, float dy) { if (child == null) { return false; } final boolean checkHorizontal = mCallback.getViewHorizontalDragRange(child) > 0; final boolean checkVertical = mCallback.getViewVerticalDragRange(child) > 0; if (checkHorizontal && checkVertical) { return dx * dx + dy * dy > mTouchSlop * mTouchSlop; } else if (checkHorizontal) { return Math.abs(dx) > mTouchSlop; } else if (checkVertical) { return Math.abs(dy) > mTouchSlop; } return false; }
private int computeSettleDuration(View child, int dx, int dy, int xvel, int yvel) { xvel = clampMag(xvel, (int) mMinVelocity, (int) mMaxVelocity); yvel = clampMag(yvel, (int) mMinVelocity, (int) mMaxVelocity); final int absDx = Math.abs(dx); final int absDy = Math.abs(dy); final int absXVel = Math.abs(xvel); final int absYVel = Math.abs(yvel); final int addedVel = absXVel + absYVel; final int addedDistance = absDx + absDy; final float xweight = xvel != 0 ? (float) absXVel / addedVel : (float) absDx / addedDistance; final float yweight = yvel != 0 ? (float) absYVel / addedVel : (float) absDy / addedDistance; int xduration = computeAxisDuration(dx, xvel, mCallback.getViewHorizontalDragRange(child)); int yduration = computeAxisDuration(dy, yvel, mCallback.getViewVerticalDragRange(child)); return (int) (xduration * xweight + yduration * yweight); }
private int computeSettleDuration(View child, int dx, int dy, int xvel, int yvel) { xvel = clampMag(xvel, (int) mMinVelocity, (int) mMaxVelocity); yvel = clampMag(yvel, (int) mMinVelocity, (int) mMaxVelocity); final int absDx = Math.abs(dx); final int absDy = Math.abs(dy); final int absXVel = Math.abs(xvel); final int absYVel = Math.abs(yvel); final int addedVel = absXVel + absYVel; final int addedDistance = absDx + absDy; final float xweight = xvel != 0 ? (float) absXVel / addedVel : (float) absDx / addedDistance; final float yweight = yvel != 0 ? (float) absYVel / addedVel : (float) absDy / addedDistance; int xduration = computeAxisDuration(dx, xvel, mCallback.getViewHorizontalDragRange(child)); int yduration = computeAxisDuration(dy, yvel, mCallback.getViewVerticalDragRange(child)); return (int) (xduration * xweight + yduration * yweight); }