Override automatic display of newly-loaded volume?

Development
1

Writing my first module.
When I use the DICOM widget to load an image set, and use a qMRMLNodeComboBox, the newly-loaded node is automatically displayed in the Red, Yellow, and Green MRML slice views. I’m hoping to override this action, so that the newly-loaded volume is only displayed in either (but only one of) the Red or Yellow view. How would I do that? Thanks.
Code is below:

def setup(self):
    ScriptedLoadableModuleWidget.setup(self)

    #Link to image database for SSFP
    self.LoadSSFPButton = qt.QPushButton("Load SSFP Image Series")
    self.LoadSSFPButton.toolTip = "Select the SSFP image series from the image database"
    self.LoadSSFPButton.enabled = True
    self.layout.addWidget(self.LoadSSFPButton)

    # SSFP volume selector
    self.SSFPSelector = slicer.qMRMLNodeComboBox()
    self.SSFPSelector.nodeTypes = ["vtkMRMLScalarVolumeNode"]
    self.SSFPSelector.selectNodeUponCreation = True
    self.SSFPSelector.addEnabled = False
    self.SSFPSelector.removeEnabled = False
    self.SSFPSelector.noneEnabled = False
    self.SSFPSelector.showHidden = False
    self.SSFPSelector.showChildNodeTypes = False
    self.SSFPSelector.setMRMLScene( slicer.mrmlScene )
    self.addRow("SSFP Image Volume: ", self.SSFPSelector)

    #Connections
    self.LoadSSFPButton.connect('clicked()', self.loadImageSeriesClicked)
    self.SSFPSelector.connect("currentNodeChanged(bool)", self.onSSFPSelect)

def loadImageSeriesClicked(self):
    slicer.modules.dicom.widgetRepresentation()
    slicer.modules.DICOMWidget.enter()
2

This a really good question. After taking a quick look, I think the DoPropagateVolumeSelection member in vtkMRMLSliceCompositeNode is just to do this. A code snippet about how to access the node and set the flag. Of course you will want to do it differently, not iterating over all 2D views.

  layoutManager = slicer.app.layoutManager()
  sliceWidgetNames = ['Red', 'Green', 'Yellow']
  for sliceWidgetName in sliceWidgetNames:
    slice = layoutManager.sliceWidget(sliceWidgetName)
    if slice is None:
      continue
    sliceLogic = slice.sliceLogic()
    compositeNode = sliceLogic.GetSliceCompositeNode()
    compositeNode.SetDoPropagateVolumeSelection(False)
2 Likes
3

Excellent, thank you! That worked well.