393_scrollData = new ScrollData();

78if (_scrollData != null) 80_scrollData.LineUp(this); 89if (_scrollData != null) 91_scrollData.LineDown(this); 100if (_scrollData != null) 102_scrollData.LineLeft(this); 111if (_scrollData != null) 113_scrollData.LineRight(this); 122if (_scrollData != null) 124_scrollData.PageUp(this); 133if (_scrollData != null) 135_scrollData.PageDown(this); 144if (_scrollData != null) 146_scrollData.PageLeft(this); 155if (_scrollData != null) 157_scrollData.PageRight(this); 166if (_scrollData != null) 168_scrollData.MouseWheelUp(this); 177if (_scrollData != null) 179_scrollData.MouseWheelDown(this); 188if (_scrollData != null) 190_scrollData.MouseWheelLeft(this); 199if (_scrollData != null) 201_scrollData.MouseWheelRight(this); 210if (_scrollData != null) 212_scrollData.SetHorizontalOffset(this, offset); 221if (_scrollData != null) 223_scrollData.SetVerticalOffset(this, offset); 232if (_scrollData == null) 238rectangle = _scrollData.MakeVisible(this, visual, rectangle); 251return (_scrollData != null) ? _scrollData.CanVerticallyScroll : false; 255if (_scrollData != null) 257_scrollData.CanVerticallyScroll = value; 269return (_scrollData != null) ? _scrollData.CanHorizontallyScroll : false; 273if (_scrollData != null) 275_scrollData.CanHorizontallyScroll = value; 289if (_scrollData != null) 291result = _scrollData.ExtentWidth; 316if (_scrollData != null) 318result = _scrollData.ExtentHeight; 341return (_scrollData != null) ? _scrollData.ViewportWidth : 0; 352return (_scrollData != null) ? _scrollData.ViewportHeight : 0; 363return (_scrollData != null) ? _scrollData.HorizontalOffset : 0; 374return (_scrollData != null) ? _scrollData.VerticalOffset : 0; 385return (_scrollData != null) ? _scrollData.ScrollOwner : null; 390if (_scrollData == null) 395_scrollData.SetScrollOwner(this, value); 501if (_scrollData != null) 1771if (_scrollData == null) 1778if (!DoubleUtil.AreClose(_scrollData.Viewport, arrangeSize)) 1780_scrollData.Viewport = arrangeSize; 1784if (!DoubleUtil.AreClose(_scrollData.Extent, _contentSize)) 1786_scrollData.Extent = _contentSize; 1791Math.Max(0, Math.Min(_scrollData.ExtentWidth - _scrollData.ViewportWidth, _scrollData.HorizontalOffset)), 1792Math.Max(0, Math.Min(_scrollData.ExtentHeight - _scrollData.ViewportHeight, _scrollData.VerticalOffset))); 1794if (!DoubleUtil.AreClose(offset, _scrollData.Offset)) 1796_scrollData.Offset = offset; 1800if (invalidateScrollInfo && _scrollData.ScrollOwner != null) 1802_scrollData.ScrollOwner.InvalidateScrollInfo(); 1856if (_scrollData != null) 1858horizontalOffset -= _scrollData.HorizontalOffset; 1859verticalOffset -= _scrollData.VerticalOffset; 2014if (_scrollData != null) 2016point = new Point(point.X + _scrollData.HorizontalOffset, point.Y + _scrollData.VerticalOffset); 2031if (_scrollData != null) 2033rect.X -= _scrollData.HorizontalOffset; 2034rect.Y -= _scrollData.VerticalOffset; 3026return _scrollData == null ? Rect.Empty : 3027new Rect(_scrollData.HorizontalOffset, _scrollData.VerticalOffset, _scrollData.ViewportWidth, _scrollData.ViewportHeight);