/** * End a fake drag of the pager. * * @see #beginFakeDrag() * @see #fakeDragBy(float) */ public void endFakeDrag() { if (!mFakeDragging) { throw new IllegalStateException("No fake drag in progress. Call beginFakeDrag first."); } final VelocityTracker velocityTracker = mVelocityTracker; velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); int initialVelocity = (int)VelocityTrackerCompat.getYVelocity( velocityTracker, mActivePointerId); mPopulatePending = true; final int totalDelta = (int) (mLastMotionX - mInitialMotionX); final int scrollX = getScrollX(); final int widthWithMargin = getWidth() + mPageMargin; final int currentPage = scrollX / widthWithMargin; final float pageOffset = (float) (scrollX % widthWithMargin) / widthWithMargin; int nextPage = determineTargetPage(currentPage, pageOffset, initialVelocity, totalDelta); setCurrentItemInternal(nextPage, true, true, initialVelocity); endDrag(); mFakeDragging = false; }
/** * End a fake drag of the pager. * * @see #beginFakeDrag() * @see #fakeDragBy(float) */ public void endFakeDrag() { if (!mFakeDragging) { throw new IllegalStateException("No fake drag in progress. Call beginFakeDrag first."); } final VelocityTracker velocityTracker = mVelocityTracker; velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); int initialVelocity = (int) VelocityTrackerCompat.getXVelocity( velocityTracker, mActivePointerId); mPopulatePending = true; final int width = getClientWidth(); final int scrollX = getScrollX(); final ItemInfo ii = infoForCurrentScrollPosition(); final int currentPage = ii.position; final float pageOffset = (((float) scrollX / width) - ii.offset) / ii.widthFactor; final int totalDelta = (int) (mLastMotionX - mInitialMotionX); int nextPage = determineTargetPage(currentPage, pageOffset, initialVelocity, totalDelta); setCurrentItemInternal(nextPage, true, true, initialVelocity); endDrag(); mFakeDragging = false; }
final float x = MotionEventCompat.getX(ev, activePointerIndex); final int totalDelta = (int) (x - mInitialMotionX); int nextPage = determineTargetPage(currentPage, pageOffset, initialVelocity, totalDelta); setCurrentItemInternal(nextPage, true, true, initialVelocity);
final float x = MotionEventCompat.getX(ev, activePointerIndex); final int totalDelta = (int) (x - mInitialMotionX); int nextPage = determineTargetPage(currentPage, pageOffset, initialVelocity, totalDelta); setCurrentItemInternal(nextPage, true, true, initialVelocity);