4225IsPixelBased = mustDisableVirtualization || (scrollUnit == ScrollUnit.Pixel);

138double newOffset = (IsPixelBased || isHorizontal) 158double newOffset = (IsPixelBased || isHorizontal) 178double newOffset = (IsPixelBased || !isHorizontal) 198double newOffset = (IsPixelBased || !isHorizontal) 218double newOffset = (IsPixelBased || isHorizontal) 238double newOffset = (IsPixelBased || isHorizontal) 258double newOffset = (IsPixelBased || !isHorizontal) 278double newOffset = (IsPixelBased || !isHorizontal) 301double newOffset = (IsPixelBased || isHorizontal) 329double newOffset = (IsPixelBased || isHorizontal) 354double newOffset = (IsPixelBased || !isHorizontal) 374double newOffset = (IsPixelBased || !isHorizontal) 401Debug.Assert(!IsPixelBased && IsScrolling && 521if (!IsPixelBased) 539if (!setAnchorInformation && !IsPixelBased) 563else if (!IsPixelBased) 649if (!IsPixelBased) 667if (!setAnchorInformation && !IsPixelBased) 691else if (!IsPixelBased) 897if (!IsPixelBased) 1141Debug.Assert(!IsPixelBased || !findTopContainer, "find 'top' container only makes sense when item-scrolling"); 1207if (!IsPixelBased) 1282if (IsPixelBased) 1323else if (!IsPixelBased) 1517if (IsPixelBased) 1565else if (!IsPixelBased) 2241IsPixelBased || isVSP45Compat, 2795!IsPixelBased && 2987if (!IsPixelBased && 3354IsPixelBased || IsVSP45Compat, 3787isVSP45Compat || IsPixelBased, 3896if (IsPixelBased) 4224bool oldIsPixelBased = IsPixelBased; 4228if (!HasMeasured || oldIsPixelBased != IsPixelBased) 4321if (IsPixelBased) 4733if (IsPixelBased) 4743if (IsPixelBased) 4849if (IsPixelBased) 4859if (IsPixelBased) 4966if (!IsPixelBased && isHorizontal && DoubleUtil.IsZero(viewport.Width) && DoubleUtil.AreClose(viewport.X, extent.Width)) 4975if (!IsPixelBased && !isHorizontal && DoubleUtil.IsZero(viewport.Height) && DoubleUtil.AreClose(viewport.Y, extent.Height)) 5046viewport.X -= IsPixelBased ? pixelSize.Width : logicalSize.Width; 5054if (IsPixelBased && DoubleUtil.GreaterThan(pixelSize.Width, parentViewport.X)) 5145viewport.Y -= IsPixelBased ? pixelSize.Height : logicalSize.Height; 5153if (IsPixelBased && DoubleUtil.GreaterThan(pixelSize.Height, parentViewport.Y)) 5267viewport.X -= IsPixelBased ? inset.Left : isHeaderBeforeItems ? 1 : 0; 5271viewport.Y -= IsPixelBased ? inset.Top : isHeaderBeforeItems ? 1 : 0; 5288if (IsPixelBased && DoubleUtil.GreaterThan(0, viewport.X)) 5391if (IsPixelBased && DoubleUtil.GreaterThan(0, viewport.Y)) 5773if (!IsPixelBased) 5801if (IsPixelBased) 5897if (!(IsPixelBased || IsVSP45Compat)) 6042containerSize.Height = IsPixelBased ? DesiredSize.Height : 1; 6047containerSize.Width = IsPixelBased ? DesiredSize.Width : 1; 6072containerSize.Height = IsPixelBased ? DesiredSize.Height : 1; 6077containerSize.Width = IsPixelBased ? DesiredSize.Width : 1; 6110if (IsPixelBased) 6149containerSize.Height = IsPixelBased ? pixelHeight : 1; 6159containerSize.Width = IsPixelBased ? pixelWidth : 1; 6263bool ignoreContainerPixelSize = IsPixelBased || (IsScrolling && !hasVirtualizingChildren); 6287if (IsPixelBased) 6696childViewport.X = (IsPixelBased ? stackPixelSizeInCacheBeforeViewport.Width : stackLogicalSizeInCacheBeforeViewport.Width) + containerSize.Width; 6702(IsPixelBased ? stackPixelSizeInViewport.Width + stackPixelSizeInCacheAfterViewport.Width : 6741childViewport.Y = (IsPixelBased ? stackPixelSizeInCacheBeforeViewport.Height : stackLogicalSizeInCacheBeforeViewport.Height) + containerSize.Height; 6747(IsPixelBased ? stackPixelSizeInViewport.Height + stackPixelSizeInCacheAfterViewport.Height : 6892if (IsPixelBased && 7114adjustedChildViewport.X -= IsPixelBased ? frontPixelSize.Width + itemDesiredSizes.PixelSize.Width 7120adjustedChildViewport.Y -= IsPixelBased ? frontPixelSize.Height + itemDesiredSizes.PixelSize.Height 7193if (IsPixelBased) 7285if (IsPixelBased) 7465if (IsPixelBased) 7478if (IsPixelBased) 7550if (IsPixelBased) 7633if (IsPixelBased) 7649if (IsPixelBased) 7665&& (IsPixelBased || DoubleUtil.AreClose(childPixelSize.Width, uniformOrAverageContainerPixelSize)); 7670&& (IsPixelBased || DoubleUtil.AreClose(childPixelSize.Height, uniformOrAverageContainerPixelSize)); 7683if (IsPixelBased) 7730if (IsPixelBased) 7786if (IsPixelBased) 7921IsPixelBased || IsVSP45Compat, 7998uniformOrAverageContainerSize = IsPixelBased ? uniformOrAverageContainerPixelSize : 1.0; 8030if (IsPixelBased || IsVSP45Compat) 8350IsPixelBased ? childPixelSize : childLogicalSize, 8363IsPixelBased ? childPixelSize : childLogicalSize, 8401if (!IsPixelBased) 8425if (IsPixelBased) 8458if (!IsPixelBased && virtualizingChild != null && IsVSP45Compat) 8490if (!IsPixelBased && virtualizingChild != null && IsVSP45Compat) 8588if (IsPixelBased) 8641if (IsPixelBased) 9593if (IsPixelBased) 9694stackPixelSize.Width = IsPixelBased || DoubleUtil.AreClose(computedViewportOffset.X, 0) ? 9699stackPixelSize.Height = IsPixelBased || DoubleUtil.AreClose(computedViewportOffset.Y, 0) ? 9704if (!IsPixelBased) 9931if (!IsPixelBased && lastPageSafeOffset.HasValue && !DoubleUtil.AreClose((double)lastPageSafeOffset, computedViewportOffset.X)) 9946if (!IsPixelBased) 10048if (IsPixelBased) 10148if (!IsPixelBased && lastPageSafeOffset.HasValue && !DoubleUtil.AreClose((double)lastPageSafeOffset, computedViewportOffset.Y)) 10163if (!IsPixelBased) 10265if (IsPixelBased) 10442if (IsPixelBased) 10543stackPixelSize.Width = IsPixelBased || DoubleUtil.AreClose(computedViewportOffset.X, 0) ? 10548stackPixelSize.Height = IsPixelBased || DoubleUtil.AreClose(computedViewportOffset.Y, 0) ? 10553if (!IsPixelBased) 10632if (!IsPixelBased) 10719if (IsPixelBased) 10747if (!IsPixelBased && lastPageSafeOffset.HasValue && !DoubleUtil.AreClose((double)lastPageSafeOffset, computedViewportOffset.X)) 10763if (!IsPixelBased) 10850if (IsPixelBased) 10878if (!IsPixelBased && lastPageSafeOffset.HasValue && !DoubleUtil.AreClose((double)lastPageSafeOffset, computedViewportOffset.Y)) 11039if (IsPixelBased)