348_scrollData = new ScrollData();

75_scrollData?.LineUp(this); 83_scrollData?.LineDown(this); 91_scrollData?.LineLeft(this); 99_scrollData?.LineRight(this); 107_scrollData?.PageUp(this); 115_scrollData?.PageDown(this); 123_scrollData?.PageLeft(this); 131_scrollData?.PageRight(this); 139_scrollData?.MouseWheelUp(this); 147_scrollData?.MouseWheelDown(this); 155_scrollData?.MouseWheelLeft(this); 163_scrollData?.MouseWheelRight(this); 171_scrollData?.SetHorizontalOffset(this, offset); 179_scrollData?.SetVerticalOffset(this, offset); 187if (_scrollData == null) 193rectangle = _scrollData.MakeVisible(this, visual, rectangle); 206return (_scrollData != null) ? _scrollData.CanVerticallyScroll : false; 210if (_scrollData != null) 212_scrollData.CanVerticallyScroll = value; 224return (_scrollData != null) ? _scrollData.CanHorizontallyScroll : false; 228if (_scrollData != null) 230_scrollData.CanHorizontallyScroll = value; 244if (_scrollData != null) 246result = _scrollData.ExtentWidth; 271if (_scrollData != null) 273result = _scrollData.ExtentHeight; 296return (_scrollData != null) ? _scrollData.ViewportWidth : 0; 307return (_scrollData != null) ? _scrollData.ViewportHeight : 0; 318return (_scrollData != null) ? _scrollData.HorizontalOffset : 0; 329return (_scrollData != null) ? _scrollData.VerticalOffset : 0; 340return _scrollData?.ScrollOwner; 345if (_scrollData == null) 350_scrollData.SetScrollOwner(this, value); 456if (_scrollData != null) 1728if (_scrollData == null) 1735if (!DoubleUtil.AreClose(_scrollData.Viewport, arrangeSize)) 1737_scrollData.Viewport = arrangeSize; 1741if (!DoubleUtil.AreClose(_scrollData.Extent, _contentSize)) 1743_scrollData.Extent = _contentSize; 1748Math.Max(0, Math.Min(_scrollData.ExtentWidth - _scrollData.ViewportWidth, _scrollData.HorizontalOffset)), 1749Math.Max(0, Math.Min(_scrollData.ExtentHeight - _scrollData.ViewportHeight, _scrollData.VerticalOffset))); 1751if (!DoubleUtil.AreClose(offset, _scrollData.Offset)) 1753_scrollData.Offset = offset; 1757if (invalidateScrollInfo && _scrollData.ScrollOwner != null) 1759_scrollData.ScrollOwner.InvalidateScrollInfo(); 1813if (_scrollData != null) 1815horizontalOffset -= _scrollData.HorizontalOffset; 1816verticalOffset -= _scrollData.VerticalOffset; 1971if (_scrollData != null) 1973point = new Point(point.X + _scrollData.HorizontalOffset, point.Y + _scrollData.VerticalOffset); 1988if (_scrollData != null) 1990rect.X -= _scrollData.HorizontalOffset; 1991rect.Y -= _scrollData.VerticalOffset; 2983return _scrollData == null ? Rect.Empty : 2984new Rect(_scrollData.HorizontalOffset, _scrollData.VerticalOffset, _scrollData.ViewportWidth, _scrollData.ViewportHeight);