LayoutView documentation on web site does not include Qt binding methods

Comments

• EugeneZelenko

  March 2023

  Sorry, my bad, I didn't notice that this is methods of LayoutViewWidget. But nevertheless, LayoutViewWidget stuff is referenced in LayoutView as part of internal API.
• EugeneZelenko

  March 2023

  Another question: It's possible to get LayoutViewWidget from LayoutView.view, but there is no method to get LayoutViewWidget from LayoutView.
• Matthias

  April 2023

  Hi Eugene,

  LayoutView used to be a QWidget, but that turned out no longer to be feasible with the upcoming of a Qt-less LayoutView for the klayout Python module.

  Instead there is LayoutViewWidget if you want to embed a LayoutView into your own user interface.

  For example, this code shows how to instantiate a LayoutView detached from the main window:

  import pya
  
  file = "test.gds"
  
  dialog = pya.QDialog()
  layout = pya.QHBoxLayout(dialog)
  
  lvw = pya.LayoutViewWidget(dialog, False, None, 0 * pya.LayoutViewBase.LV_NoPropertiesPopup)
  
  layout.addWidget(lvw.hierarchy_control_frame())
  layout.addWidget(lvw)
  
  vlayout = pya.QVBoxLayout(dialog)
  layout.addLayout(vlayout)
  
  vlayout.addWidget(lvw.layer_control_frame())
  vlayout.addWidget(lvw.layer_toolbox_frame())
  
  lvw.view().switch_mode("select")
  lvw.view().load_layout(file)
  
  dialog.exec_()
  

  It is however, not possible currently to get the QWidget from an existing LayoutView. That is not impossible, but I wonder what the use case is.

  Kind regards,

  Matthias
• EugeneZelenko

  April 2023 edited April 2023

  Hi, Matthias!

  Use case is to tweak default appearance of some of LayoutViewWidget widgets while processing MainWindow.on_current_view_changed/on_view_created. For example, hiding/showing cells and layers panels.
• Matthias

  April 2023

  I see. I feels a bit hacky as you need to act on the internal widget hierarchy, but basically that is possible.
  It should be easy to provide that access. I just wasn't aware of the need to have it. I have created a ticket to remind me: https://github.com/KLayout/klayout/issues/1339

  Matthias