LayoutView documentation on web site does not include Qt binding methods

EugeneZelenko

Hi, Matthias!

Source code in src/layview/layview/gsiDeclLayLayoutView_qt.cc contains bunch of methods in HAVE_QTBINDINGS section, but they are not included into web site documentation through they are referenced in other parts like bookmarks_frame in LV_NoBookmarksView.

EugeneZelenko

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

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

Matthias

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

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

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