Hide radio button or collapsible item slice

Tokai · March 24, 2020, 3:58pm

Hi ,
I want to hide some option for use, in slicer shown in below. This is from Landmark registration module.
Capture

Technically it should be possible to hide or show any part of the module. I have seen an example given in documentation to control widget view like this:

sliceController = slicer.app.layoutManager().sliceWidget("Red").sliceController()
# hide what is not needed
sliceController.pinButton().hide()
#sliceController.viewLabel().hide()
sliceController.fitToWindowToolButton().hide()
sliceController.sliceOffsetSlider().hide()

However, if I do not know the name, such as ‘Red’ in the given example, I can not hide.
So, my question is how can I get the names of radio buttons or collapsible items and sub-items(shown in picture) so that I can hide them to control the view?

pieper · March 24, 2020, 7:07pm

It’s not considered good practice to rely on “reaching inside” other modules to turn on and off parts of the display, because this makes your code brittle code (it can break if the other module’s GUI changes even a little). Better practice would be to study the code you are using and generate pull requests to modularize the interface to make it more reusable (work with the developer of the module to find a good way to do this - it will probably make the original code cleaner too).

That said, for debugging and testing we do have utilities to find widgets within the application.

github.com

Slicer/Slicer/blob/master/Base/Python/slicer/util.py#L204-L267


def findChildren(widget=None, name="", text="", title="", className=""):
  """ Return a list of child widgets that meet all the given criteria.
  If no criteria are provided, the function will return all widgets descendants.
  If no widget is provided, slicer.util.mainWindow() is used.
  :param widget: parent widget where the widgets will be searched
  :param name: name attribute of the widget
  :param text: text attribute of the widget
  :param title: title attribute of the widget
  :param className: className() attribute of the widget
  :return: list with all the widgets that meet all the given criteria.
  """
  # TODO: figure out why the native QWidget.findChildren method does not seem to work from PythonQt
  import slicer, fnmatch
  if not widget:
    widget = mainWindow()
  if not widget:
    return []
  children = []
  parents = [widget]
  kwargs = {'name': name, 'text': text, 'title': title, 'className': className}

This file has been truncated. show original

Tokai · March 24, 2020, 7:49pm

Hi @pieper,
Thanks, I already tried with that .
The ‘findChildren’ take atleast two arguments. So, I tried like below code and it returns an empty list:

w = slicer.modules.LandmarkRegistrationWidget
slicer.util.findChildren(w,'LandmarkRegistration')
[]

So, the list is empty. Do you have any suggestion why is happening that?

lassoan · March 24, 2020, 8:00pm

We also have a number of high-level set...Visible() functions in slicer.util for showing/hiding various parts of the application GUI. We keep maintaining these functions, so they will work even if underlying widgets slightly change.

github.com

Slicer/Slicer/blob/master/Base/Python/slicer/util.py#L2144-L2230


def setToolbarsVisible(visible, ignore=None):
  """Show/hide all existing toolbars, except those listed in
  ignore list.
  """


  for toolbar in mainWindow().findChildren('QToolBar'):
    if ignore is not None and toolbar in ignore:
      continue
    toolbar.setVisible(visible)


  # Prevent sequence browser toolbar showing up automatically
  # when a sequence is loaded.
  # (put in try block because Sequence Browser module is not always installed)
  try:
    import slicer
    slicer.modules.sequencebrowser.autoShowToolBar = visible
  except:
    # Sequences module is not installed
    pass

This file has been truncated. show original

jcfr · March 24, 2020, 8:14pm

To answer that specific question, you would have to do this:

w = slicer.modules.landmarkregistration.widgetRepresentation()
slicer.util.findChildren(w)

slicer.util.findChildren(w, name='LandmarkRegistration')  # Always specify keyword like 'name'

That said, note that the LandmarkRegistration module is not available in the latest version of Slicer.

lassoan · March 24, 2020, 8:18pm

I’ve added an issue to fix it for latest Slicer version:

Tokai · March 24, 2020, 8:23pm

Hi @jcfr ,
I tried your code.
So the the line “slicer.util.findChildren(w)” returns a big list.

> [qSlicerScriptedLoadableModuleWidget(0x1afaa382430, name="LandmarkRegistrationModuleWidget") , QWidget(0x1afabfb0390) , ctkCollapsibleButton(0x1afb1e6a5a0) , ctkCollapsibleButton(0x1afc6173fa0) , QRadioButton(0x1afc6173420) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFC61736E0), QRadioButton(0x1afc6173620) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFC6173DA0), QRadioButton(0x1afc61732a0) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFC6173FE0), QLabel(0x1afc6173d60) , QFormLayout (QFormLayout at: 0x000001AFB21C3DC0), QVBoxLayout (QVBoxLayout at: 0x000001AFB21C4390), QFrame(0x1afc6173c20, name="EditOptionsFrame") , QVBoxLayout (QVBoxLayout at: 0x000001AFB21C3D60), QGroupBox(0x1afb1e6a6e0) , QRadioButton(0x1afb1e6a8e0) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E6C0A0), QRadioButton(0x1afb1e6a720) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E6AA20), QFormLayout (QFormLayout at: 0x000001AFB1EDE110), QFormLayout (QFormLayout at: 0x000001AFB1EDDDB0), ctkCollapsibleButton(0x1afb1e6b020) , ctkCollapsibleButton(0x1afc6173320) , QRadioButton(0x1afc61735a0) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFC6173A20), QRadioButton(0x1afc61731a0) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFC6173F20), QLabel(0x1afc6173aa0) , QRadioButton(0x1afc6174060) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFC6173960), QRadioButton(0x1afc6173760) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFC61734A0), QLabel(0x1afc6173ce0) , QFormLayout (QFormLayout at: 0x000001AFB21C26B0), QVBoxLayout (QVBoxLayout at: 0x000001AFB21C3370), QVBoxLayout (QVBoxLayout at: 0x000001AFB21C2230), QFrame(0x1afc6173460, name="EditOptionsFrame") , QVBoxLayout (QVBoxLayout at: 0x000001AFB21C0AF0), QGroupBox(0x1afb1e6a660) , QRadioButton(0x1afb1e6a3e0) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E6AEE0), QRadioButton(0x1afb1e6a920) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E6A420), QFormLayout (QFormLayout at: 0x000001AFB1EDD600), QPushButton(0x1afb1e6afe0) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E6A3A0), QFormLayout (QFormLayout at: 0x000001AFB1EDD0F0), ctkCollapsibleButton(0x1afabfb0810) , QWidget(0x1afb1e6ae20) , QWidget(0x1afb1e6aea0) , QGroupBox(0x1afc6c2f6b0) , QPushButton(0x1afc6c310b0) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFC6C2BA30), QPushButton(0x1afc6c2fb70) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFC6C310F0), QFormLayout (QFormLayout at: 0x000001AFC59170D0), QHBoxLayout (QHBoxLayout at: 0x000001AFC5917A60), QVBoxLayout (QVBoxLayout at: 0x000001AFB1EDD090), QFormLayout (QFormLayout at: 0x000001AFB1EDD3F0), QWidget(0x1afb1e693e0) , QWidget(0x1afb1e699a0) , QGroupBox(0x1afb1e69560) , QWidget(0x1afb1e6a360) , QPushButton(0x1afb1e6af20) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E6ACA0), QPushButton(0x1afb1e6a9a0) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E6A1E0), QPushButton(0x1afb1e6ab20) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E6A1A0), QHBoxLayout (QHBoxLayout at: 0x000001AFB1EDC790), QLabel(0x1afb1e6a960) , QWidget(0x1afb1e696e0) , QWidget(0x1afb1e6ae60) , QCheckBox(0x1afb1e6aaa0) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E6B120), QCheckBox(0x1afb1e6af60) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E6B0E0), QVBoxLayout (QVBoxLayout at: 0x000001AFB1EDC430), ctkSliderWidget(0x1afb1e69720, name="ctkSliderWidget") , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E6AD60), ctkDoubleSpinBox(0x1afb1e698a0, name="SpinBox") , QHBoxLayout (QHBoxLayout at: 0x000001AFB1EDB410), ctkQDoubleSpinBox(0x1afb1dc48e0) , QLineEdit(0x1afb1e6aba0, name="qt_spinbox_lineedit") , QWidgetLineControl (QWidgetLineControl at: 0x000001AFAF476580), QValidator (QValidator at: 0x000001AFB1EDB500), ctkDoubleSlider(0x1afb1e697a0, name="Slider") , QHBoxLayout (QHBoxLayout at: 0x000001AFB1EDBB30), QSlider(0x1afb1e697e0) , QHBoxLayout (QHBoxLayout at: 0x000001AFB1EDB710), QHBoxLayout (QHBoxLayout at: 0x000001AFB1EDBCE0), QLabel(0x1afb1e6ade0) , QWidget(0x1afb1e694e0) , QCheckBox(0x1afb1e69f60) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E69160), QCheckBox(0x1afb1e69320) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E6A0E0), QCheckBox(0x1afb1e69620) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E696A0), QCheckBox(0x1afb1e69e20) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E69520), QHBoxLayout (QHBoxLayout at: 0x000001AFB1EDA900), QLabel(0x1afb1e69960) , QWidget(0x1afb1e69c60) , QPushButton(0x1afb1e692e0) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E6A0A0), QPushButton(0x1afb1e6a060) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E69CA0), QPushButton(0x1afb1e694a0) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E69A60), QPushButton(0x1afb1e69420) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E69220), QHBoxLayout (QHBoxLayout at: 0x000001AFB1EDA540), QLabel(0x1afb1e69260) , QFormLayout (QFormLayout at: 0x000001AFB1EDAA80), QVBoxLayout (QVBoxLayout at: 0x000001AFB1EDA720), QFormLayout (QFormLayout at: 0x000001AFB1EDA150), qMRMLNodeComboBox(0x1afb1e627e0) , qMRMLSortFilterProxyModel (qMRMLSortFilterProxyModel at: 0x000001AFB1E63A60), qMRMLNodeFactory (qMRMLNodeFactory at: 0x000001AFB1E45A20), ctkComboBox(0x1afb1e63a20) , QComboBoxPrivateContainer(0x1afaa382f70) , QComboBoxListView(0x1afb1e632e0) , QItemSelectionModel (QItemSelectionModel at: 0x000001AFB1E45A80), QWidget(0x1afb1dbed00, name="qt_scrollarea_vcontainer") , QBoxLayout (QBoxLayout at: 0x000001AFB1ED5860), QScrollBar(0x1afb1e63e60) , QWidget(0x1afb1dbf480, name="qt_scrollarea_hcontainer") , QBoxLayout (QBoxLayout at: 0x000001AFB1ED5590), QScrollBar(0x1afb1e63520) , QWidget(0x1afb1e63fe0, name="qt_scrollarea_viewport") , QBoxLayout (QBoxLayout at: 0x000001AFB1ED60A0), QHBoxLayout (QHBoxLayout at: 0x000001AFB1ED6460), qMRMLSceneModel (qMRMLSceneModel at: 0x000001AFB1E62A60), QLabel(0x1afb1e69aa0) , qMRMLNodeComboBox(0x1afb1e5cda0) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E6B6E0), qMRMLSortFilterProxyModel (qMRMLSortFilterProxyModel at: 0x000001AFB1E5DC60), qMRMLNodeFactory (qMRMLNodeFactory at: 0x000001AFB1E44360), ctkComboBox(0x1afb1e5cde0) , QComboBoxPrivateContainer(0x1afaa382d90) , QComboBoxListView(0x1afb1e5cba0) , QItemSelectionModel (QItemSelectionModel at: 0x000001AFB1E43DA0), QWidget(0x1afb1dbb6f0, name="qt_scrollarea_vcontainer") , QBoxLayout (QBoxLayout at: 0x000001AFB1DA1780), QScrollBar(0x1afb1e5dee0) , QWidget(0x1afb1dbabb0, name="qt_scrollarea_hcontainer") , QBoxLayout (QBoxLayout at: 0x000001AFB1DA09A0), QScrollBar(0x1afb1e5cca0) , QWidget(0x1afb1e5cc20, name="qt_scrollarea_viewport") , QBoxLayout (QBoxLayout at: 0x000001AFB1DA2080), QHBoxLayout (QHBoxLayout at: 0x000001AFB1DA2890), qMRMLSceneModel (qMRMLSceneModel at: 0x000001AFB1E5C2A0), QLabel(0x1afb1e621e0) , qMRMLNodeComboBox(0x1afb1e570e0) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E6C060), qMRMLSortFilterProxyModel (qMRMLSortFilterProxyModel at: 0x000001AFB1E56BE0), qMRMLNodeFactory (qMRMLNodeFactory at: 0x000001AFB1E41F60), ctkComboBox(0x1afb1e56220) , QComboBoxPrivateContainer(0x1afaa3827f0) , QComboBoxListView(0x1afb1e56560) , QItemSelectionModel (QItemSelectionModel at: 0x000001AFB1E421E0), QWidget(0x1afb1db7ff0, name="qt_scrollarea_vcontainer") , QBoxLayout (QBoxLayout at: 0x000001AFB1DAB2C0), QScrollBar(0x1afb1e56620) , QWidget(0x1afb1db7a50, name="qt_scrollarea_hcontainer") , QBoxLayout (QBoxLayout at: 0x000001AFB1DABBC0), QScrollBar(0x1afb1e569a0) , QWidget(0x1afb1e56960, name="qt_scrollarea_viewport") , QBoxLayout (QBoxLayout at: 0x000001AFB1DAB8C0), QHBoxLayout (QHBoxLayout at: 0x000001AFB1DAB2F0), qMRMLSceneModel (qMRMLSceneModel at: 0x000001AFB1E56D60), QLabel(0x1afb1e5ce60) , qMRMLNodeComboBox(0x1afabfb0b50) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFB1E6BBE0), qMRMLSortFilterProxyModel (qMRMLSortFilterProxyModel at: 0x000001AFA98FFB60), qMRMLNodeFactory (qMRMLNodeFactory at: 0x000001AFB1E40340), ctkComboBox(0x1afabfb4c10) , QComboBoxPrivateContainer(0x1afaa381210) , QComboBoxListView(0x1afabfbb6d0) , QItemSelectionModel (QItemSelectionModel at: 0x000001AFB1E3FF80), QWidget(0x1afb1db2230, name="qt_scrollarea_vcontainer") , QBoxLayout (QBoxLayout at: 0x000001AFB1DA6340), QScrollBar(0x1afabfa0d10) , QWidget(0x1afb1db2190, name="qt_scrollarea_hcontainer") , QBoxLayout (QBoxLayout at: 0x000001AFB1DA6880), QScrollBar(0x1afabfbb950) , QWidget(0x1afabfbc050, name="qt_scrollarea_viewport") , QBoxLayout (QBoxLayout at: 0x000001AFB1DA65B0), QHBoxLayout (QHBoxLayout at: 0x000001AFB1DA7420), qMRMLSceneModel (qMRMLSceneModel at: 0x000001AFABFB0C50), QLabel(0x1afb1e56260) , QFormLayout (QFormLayout at: 0x000001AFB1DA66A0), QVBoxLayout (QVBoxLayout at: 0x000001AFB1DA5B60), QPushButton(0x1afabfaa110) , PythonQtSignalReceiverBase (PythonQtSignalReceiverBase at: 0x000001AFABFB1150), QVBoxLayout (QVBoxLayout at: 0x000001AFB1DA45A0)]

And this one " slicer.util.findChildren(w, name=‘LandmarkRegistration’) returns empty list []

jcfr · March 24, 2020, 8:40pm

You need to specify the name of an existing widget.

Looking at the source LandmarkRegistration.py, not all widget are associated with a name.

First find in the source what you would like to hide and if it has no name, you could call findChildren specifying a class name and then retrieving the widget by index.

Just be aware that this approach is very brittle and not sustainable.

Tokai · March 24, 2020, 9:01pm

@jcfr
Looking at the source LandmarkRegistration.py, not all widget are associated with a name.

First find in the source what you would like to hide and if it has no name, you could call findChildren specifying a class name and then retrieving the widget by index.

Can you give me a dummy example (fairly new at this) ? Did not understand it.
In the LandmarkRegistration the class name is also ‘LandmarkRegistration’. And it also returns empty list. And I am trying to hide LocalRefinement, Data probe etc. collapsible frames.

jcfr · March 24, 2020, 9:40pm

widgets are associated with a name

Qt provides a function to associate an objectName with any QObject or QWidget instance. See QObject Class | Qt Core 5.15.16

This means for a given hierarchy of QWidget, it is possible to easily lookup widget given its name.

To illustrate, I will take the Endoscopy module as an example. Looking at the source, we can see that objectName is set:

github.com

Slicer/Slicer/blob/67456afd687fea4d3fece919ed0c7e2406875e9c/Modules/Scripted/Endoscopy/Endoscopy.py#L87-L93


      
          # Input fiducials node selector
          inputFiducialsNodeSelector = slicer.qMRMLNodeComboBox()
          inputFiducialsNodeSelector.objectName = 'inputFiducialsNodeSelector'
          inputFiducialsNodeSelector.toolTip = "Select a fiducial list to define control points for the path."
          inputFiducialsNodeSelector.nodeTypes = ['vtkMRMLMarkupsFiducialNode', 'vtkMRMLMarkupsCurveNode',
            'vtkMRMLAnnotationHierarchyNode', 'vtkMRMLFiducialListNode']
          inputFiducialsNodeSelector.noneEnabled = False

Allowing us to easily retrieve the corresponding widget instance:

>>> slicer.util.selectModule("Endoscopy")
>>> w = slicer.modules.endoscopy.widgetRepresentation()
>>> slicer.util.findChildren(w, name="inputFiducialsNodeSelector")
[qMRMLNodeComboBox(0x8a8c9f0, name="inputFiducialsNodeSelector") ]

Now, we could also achieve this without relying on the objectName using something like this:

>>> slicer.util.findChildren(w, className="qMRMLNodeComboBox")[0]
qMRMLNodeComboBox(0x8a8c9f0, name="inputFiducialsNodeSelector")

hide […] Data probe collapsible frames

For the dataprobe, this could be achieved simply by doing this:

slicer.util.setDataProbeVisible(False)

Tokai · March 25, 2020, 8:23am

Hi @jcfr,

The example you gave

`slicer.util.findChildren(w, name=“inputFiducialsNodeSelector”)

Yes, this works for endoscopy module. However, this is inside the ‘path’ collapsible frame which is not a ‘qMRML…type’ but ctk.ctkCollapsibleButton. So my idea is if I can hide the frame, everything inside should be hidden anyway. However when I try to access like the Fiducial example you gave in landmarkRegistration, it returns empty list.

slicer.util.findChildren(w, className="Local Refinement")
[]

pieper · March 25, 2020, 1:28pm

You can use any of the keyword argument search parameters. Sometimes text is the most useful (but also the most potentially brittle for all the reasons we’ve stated).

In this case here’s a query that works:

slicer.util.findChildren(text="Local Refinement")[0].hide()

Tokai · March 25, 2020, 1:39pm

Hi @pieper
You are life saver! I was doing this and that last 24 hours :))
Thanks a lot .

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