Methods
    
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  drawChart(T lastPoint, T curPoint, double lastX, double curX, Size size, Canvas canvas)
    → void
  
  
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  drawGrid(Canvas canvas, int gridRows, int gridColumns)
    → void
  
  
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  drawLine(double? lastPrice, double? curPrice, Canvas canvas, double lastX, double curX, Color color)
    → void
  
  
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  drawText(Canvas canvas, T data, double x)
    → void
  
  
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  drawVerticalText(dynamic canvas, dynamic textStyle, int gridRows)
    → void
  
  
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  format(double? n)
    → String
  
  
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  getTextStyle(Color color)
    → TextStyle
  
  
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  getY(double y)
    → double
  
  
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  getYFromPrice(double screenY)
    → double
  
  
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  根据屏幕Y坐标计算对应的价格
  
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  noSuchMethod(Invocation invocation)
    → dynamic
  
  
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  Invoked when a nonexistent method or property is accessed.
  inherited 
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  toString()
    → String
  
  
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  A string representation of this object.
  inherited