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  | axisType | 
 Gets or sets the axis type the viewport is relative to.
 
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  | endValue | 
 Gets the axis value where the viewport ends.
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  | isAutoZoomedToEnd | 
 Gets or sets a value indicating whether the scrollbar is initially scrolled to the end when automatically
 zooming into a specified range of the axis.
 
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  | isScrollBarVisible | 
 Gets or sets a value indicating whether the scrollbar is visible for panning along this viewport
 when zoomed in.
 
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  | maxVisibleCategories | 
 Gets or sets the maximum number of categories to display at a time when categorical data is changed, with
 the rest accessed by scrolling.
 
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  | maxVisibleRange | 
 Gets or sets a value identifying a range of values along the axis to automatically zoom into, with the 
 rest accessed by scrolling.
 
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  | maxVisibleRangePromise | 
 Gets or sets a jQuery.Promise returning a start date or array of two dates identifying a range
 of values along the axis to automatically zoom into.
 
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  | scrollBarThumbFill | 
 Gets or sets the brush used to fill the scrollbar track.
 
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  | scrollBarTrackFill | 
 Gets or sets the brush used to fill the scrollbar track.
 
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  | scrollBarWidth | 
 Gets or sets the size perpendicular to the axis of the scroll bar in pixels.
 
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  | startValue | 
 Gets the axis value where the viewport ends.
  | 
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  | clearHistory | 
 Clears zoom history.
 
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  | fromJObject | 
 Applies the property values from a plain object created from JSON to the properties of this instance.
 
  Inherited from Class. | 
  | invalidate | 
 Ensures the data control is re-drawn using the current data and settings at the next best 
 time made available by the browser. This method is normally called automatically when
 needed.
 
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  | scroll | 
 Scrolls the viewport maintaining the same zoom level to include the positions of the specified values.
 
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  | toJSON | 
 Implementation for toJSON to return an object that will include this class's
 prototype property values when stringified.
 
  Inherited from Class. | 
  | toString | 
 Creates a string representation of this instance.
 
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  | undoZoom | 
 Returns to the last zoom level and position before a change in the zoom level was made.
 If no previous zoom level is available, the viewport is zoomed out to display the entire chart.
 
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  | zoom | 
 Zooms into the chart so that the visible parts of the axis starts and ends at the positions of the specified values.
 
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