and9

@Override
    public boolean onTouchEvent(MotionEvent ev) {
      
        case MotionEvent.ACTION_MOVE:

            mNavigator.setDrawToVisible(true);

            final int scrollX = mScrollX;
            final int scrollY = mScrollY;

            final float touchX = mTouchOffsetX;
            final float touchY = mTouchOffsetY;

            final int offsetX = mBitmapOffsetX;
            final int offsetY = mBitmapOffsetY;

            int left = (int) (scrollX + mLastMotionX - touchX - offsetX);
            int top = (int) (scrollY + mLastMotionY - touchY - offsetY);

            final Bitmap dragBitmap = mDragBitmap;
            final int width = dragBitmap.getWidth();
            final int height = dragBitmap.getHeight();

            final Rect rect = mRect;
            rect.set(left - 1, top - 1, left + width + 1, top + height + 1);

            mLastMotionX = x;
            mLastMotionY = y;

            left = (int) (scrollX + x - touchX - offsetX);
            top = (int) (scrollY + y - touchY - offsetY);

            rect.union(left - 1, top - 1, left + width + 1, top + height + 1);

            final int[] coordinates = mDropCoordinates;
            DropTarget dropTarget = findDropTarget((int) x, (int) y, coordinates);
            if (dropTarget != null) {
                if (mLastDropTarget == dropTarget) {
                    dropTarget.onDragOver(mDragSource, coordinates[0], coordinates[1],
                        (int) mTouchOffsetX, (int) mTouchOffsetY, mDragInfo);
                } else {
                    if (mLastDropTarget != null) {
                        mLastDropTarget.onDragExit(mDragSource, coordinates[0], coordinates[1],
                            (int) mTouchOffsetX, (int) mTouchOffsetY, mDragInfo);
                    }
                    dropTarget.onDragEnter(mDragSource, coordinates[0], coordinates[1],
                        (int) mTouchOffsetX, (int) mTouchOffsetY, mDragInfo);
                }
            } else {
                if (mLastDropTarget != null) {
                    mLastDropTarget.onDragExit(mDragSource, coordinates[0], coordinates[1],
                        (int) mTouchOffsetX, (int) mTouchOffsetY, mDragInfo);
                }
            }

            findCellPoint(dropTarget, coordinates, x, y);

            invalidate();


            mLastDropTarget = dropTarget;

            boolean inDragRegion = false;
            if (mDragRegion != null) {
                final RectF region = mDragRegion;
                final boolean inRegion = region.contains(ev.getRawX(), ev.getRawY());
                if (!mEnteredRegion && inRegion) {
                    mDragPaint = mTrashPaint;
                    mEnteredRegion = true;
                    inDragRegion = true;
                } else if (mEnteredRegion && !inRegion) {
                    mDragPaint = mTranslucence;
                    mEnteredRegion = false;
                }
            }

            int offset = getDragWingsOffset();
          
            if (!inDragRegion && x < SCROLL_ZONE && y >= offset && y <= offset + calculate.getDragWingsHeight()) {
           
                if (mScrollState == SCROLL_OUTSIDE_ZONE) {
                    mScrollState = SCROLL_WAITING_IN_ZONE;
                    mScrollRunnable.setDirection(SCROLL_LEFT);
                    postDelayed(mScrollRunnable, SCROLL_DELAY);
                }
          
            } else if (!inDragRegion && x > getWidth() - SCROLL_ZONE && y >= offset && y <= offset + calculate.getDragWingsHeight()) {
         
                if (mScrollState == SCROLL_OUTSIDE_ZONE) {
                    mScrollState = SCROLL_WAITING_IN_ZONE;
                    mScrollRunnable.setDirection(SCROLL_RIGHT);
                    postDelayed(mScrollRunnable, SCROLL_DELAY);
                }
            } else {
                if (mScrollState == SCROLL_WAITING_IN_ZONE) {
                    mScrollState = SCROLL_OUTSIDE_ZONE;
                    mScrollRunnable.setDirection(SCROLL_RIGHT);
                    removeCallbacks(mScrollRunnable);
                }
            }

            break;
       
    }