349_scrollData = new ScrollData();

76_scrollData?.LineUp(this); 84_scrollData?.LineDown(this); 92_scrollData?.LineLeft(this); 100_scrollData?.LineRight(this); 108_scrollData?.PageUp(this); 116_scrollData?.PageDown(this); 124_scrollData?.PageLeft(this); 132_scrollData?.PageRight(this); 140_scrollData?.MouseWheelUp(this); 148_scrollData?.MouseWheelDown(this); 156_scrollData?.MouseWheelLeft(this); 164_scrollData?.MouseWheelRight(this); 172_scrollData?.SetHorizontalOffset(this, offset); 180_scrollData?.SetVerticalOffset(this, offset); 188if (_scrollData == null) 194rectangle = _scrollData.MakeVisible(this, visual, rectangle); 207return (_scrollData != null) ? _scrollData.CanVerticallyScroll : false; 211if (_scrollData != null) 213_scrollData.CanVerticallyScroll = value; 225return (_scrollData != null) ? _scrollData.CanHorizontallyScroll : false; 229if (_scrollData != null) 231_scrollData.CanHorizontallyScroll = value; 245if (_scrollData != null) 247result = _scrollData.ExtentWidth; 272if (_scrollData != null) 274result = _scrollData.ExtentHeight; 297return (_scrollData != null) ? _scrollData.ViewportWidth : 0; 308return (_scrollData != null) ? _scrollData.ViewportHeight : 0; 319return (_scrollData != null) ? _scrollData.HorizontalOffset : 0; 330return (_scrollData != null) ? _scrollData.VerticalOffset : 0; 341return _scrollData?.ScrollOwner; 346if (_scrollData == null) 351_scrollData.SetScrollOwner(this, value); 457if (_scrollData != null) 1729if (_scrollData == null) 1736if (!DoubleUtil.AreClose(_scrollData.Viewport, arrangeSize)) 1738_scrollData.Viewport = arrangeSize; 1742if (!DoubleUtil.AreClose(_scrollData.Extent, _contentSize)) 1744_scrollData.Extent = _contentSize; 1749Math.Max(0, Math.Min(_scrollData.ExtentWidth - _scrollData.ViewportWidth, _scrollData.HorizontalOffset)), 1750Math.Max(0, Math.Min(_scrollData.ExtentHeight - _scrollData.ViewportHeight, _scrollData.VerticalOffset))); 1752if (!DoubleUtil.AreClose(offset, _scrollData.Offset)) 1754_scrollData.Offset = offset; 1758if (invalidateScrollInfo && _scrollData.ScrollOwner != null) 1760_scrollData.ScrollOwner.InvalidateScrollInfo(); 1814if (_scrollData != null) 1816horizontalOffset -= _scrollData.HorizontalOffset; 1817verticalOffset -= _scrollData.VerticalOffset; 1972if (_scrollData != null) 1974point = new Point(point.X + _scrollData.HorizontalOffset, point.Y + _scrollData.VerticalOffset); 1989if (_scrollData != null) 1991rect.X -= _scrollData.HorizontalOffset; 1992rect.Y -= _scrollData.VerticalOffset; 2984return _scrollData == null ? Rect.Empty : 2985new Rect(_scrollData.HorizontalOffset, _scrollData.VerticalOffset, _scrollData.ViewportWidth, _scrollData.ViewportHeight);