Weird parameter dialog resizing when hiding / showing many parameters at once with callback_impl

[klayoutmatthias]

For details see https://www.klayout.de/forum/discussion/2458/weird-parameter-dialog-resizing-when-hiding-showing-many-parameters-at-once-with-callback-impl#latest

Here is some sample PCell code:

import pya

class Discussion2458PCell(pya.PCellDeclarationHelper):

  description = ""

  def __init__(self, description):

    super(Discussion2458PCell, self).__init__()

    self.description = description

    self.param("a", self.TypeCallback, "AParam")
    self.param("b", self.TypeDouble, "BParam", default = 22)
    self.param("c", self.TypeBoolean, "CParam")
    self.param("d1", self.TypeBoolean, "D1Param")
    self.param("d2", self.TypeBoolean, "D2Param")
    self.param("d3", self.TypeBoolean, "D3Param")
    self.param("d4", self.TypeBoolean, "D4Param")
    self.param("d5", self.TypeBoolean, "D5Param")
    self.param("e", self.TypeBoolean, "EParam")

  def callback_impl(self, name):
    if name == "":
      self.a.tooltip = "Tool Tip for A"
      self.b.tooltip = "Tool Tip for B"
    if name == "" or name == "b":
      self.c.enabled = self.b.value >= 20.0
    if name == "" or name == "c":
      self.b.value += 1
      self.b.readonly = self.c.value
      self.b.icon = pya.PCellParameterState.ErrorIcon if self.c.value else pya.PCellParameterState.WarningIcon
      self.d1.visible = self.c.value
      self.d2.visible = self.c.value
      self.d3.visible = self.c.value
      self.d4.visible = self.c.value
      self.d5.visible = not self.c.value
    if name == "a":
      print("INFO: button pressed")
      
  def display_text_impl(self):
    return self.description
  
  def produce_impl(self):
    if self.b < 0:
      raise Exception("An error! b<0!")
    self.cell.shapes(self.layout.layer(1, 0)).insert(pya.DBox(0, 0, 1.0, 1.0))

class Discussion2458PCellLib(pya.Library):

  def __del__(self):
    print("INFO: del on "+repr(self))
    
  def __init__(self):
    self.description = "Discussion2458 PCell library"
    self.layout().register_pcell("PCell", Discussion2458PCell("description"))
    self.register("Discussion2458PCellLib")
    
Discussion2458PCellLib()

Problem exists if the "C" parameter gets enabled:

or disabled: