class_docstr: **Bases:** :class:`GraphicsObject <pyqtgraph.GraphicsObject>`
class_docstr_tok: ["*","*","Bases",":","*","*",":","class",":","`","GraphicsObject","<","pyqtgraph.GraphicsObject",">","`"]
code: def _rerender(self, *, autoLevels):
      self.qpicture = None
      if self.z is not None:
          if (self.levels is None) or autoLevels:
              # Autoscale colormap
              z_min = self.z.min()
              z_max = self.z.max()
              self.setLevels((z_min, z_max), update=False)
          self.qpicture = self._drawPicture()
  
imports: import numpy
  from ..None import Qt, colormap
  from ..None import functions
  from ..Qt import QtCore, QtGui
  from .GraphicsObject import GraphicsObject
label_desc: Use image node_id 4 for calling the PColorMeshItem obj's underlying member method code with example usage: obj._rerender() without return types