class_docstr: Base class for graphics items with boundaries relative to a GraphicsView or ViewBox.
  The purpose of this class is to allow the creation of GraphicsItems which live inside 
  a scalable view, but whose boundaries will always stay fixed relative to the view's boundaries.
  For example: GridItem, InfiniteLine
  
  The view can be specified on initialization or it can be automatically detected when the item is painted.
  
  NOTE: Only the item's boundingRect is affected; the item is not transformed in any way. Use viewRangeChanged
  to respond to changes in the view.
class_docstr_tok: ["Base","class","for","graphics","items","with","boundaries","relative","to","a","GraphicsView","or","ViewBox",".","The","purpose","of","this","class","is","to","allow","the","creation","of","GraphicsItems","which","live","inside","a","scalable","view",",","but","whose","boundaries","will","always","stay","fixed","relative","to","the","view","'s","boundaries",".","For","example",":","GridItem",",","InfiniteLine","The","view","can","be","specified","on","initialization","or","it","can","be","automatically","detected","when","the","item","is","painted",".","NOTE",":","Only","the","item","'s","boundingRect","is","affected",";","the","item","is","not","transformed","in","any","way",".","Use","viewRangeChanged","to","respond","to","changes","in","the","view","."]
docstr: Called by ViewBox for determining the auto-range bounds.
  By default, UIGraphicsItems are excluded from autoRange.
docstr_tok: ["Called","by","ViewBox","for","determining","the","auto-range","bounds",".","By","default",",","UIGraphicsItems","are","excluded","from","autoRange","."]
code: def dataBounds(self, axis, frac=1.0, orthoRange=None):
      """Called by ViewBox for determining the auto-range bounds.
      By default, UIGraphicsItems are excluded from autoRange."""
      return None
  
file_path: pyqtgraph/pyqtgraph/graphicsItems/UIGraphicsItem.py
imports: from ..Qt import QtCore, QtGui
  from .GraphicsObject import GraphicsObject
label_desc: Use image node_id 5 for calling the UIGraphicsItem obj's underlying member method code with example usage: obj.dataBounds(axis, frac, orthoRange) and returns: None