How to display a line with interaction handles by python?

jumbojing · August 20, 2021, 1:46pm

How to display a line (vtkMRMLMarkupsLineNode) with interaction handles by python?

@lassoan@Juicy@jamesobutler @jcfr @pieper

like that:

jamesobutler · August 20, 2021, 3:21pm

First get the reference to vtkMRMLMarkupsLineNode (see get-mrml-node-from-the-scene)
Get the DisplayNode for that Line Node. (similar to change-markup-fiducial-display-properties)
The interactive handles can be set from the DisplayNode. SetHandlesInteractive.

Slicer/Slicer/blob/0094e9a35bd266cc8b0e677858dabce797c9928f/Modules/Loadable/Markups/Widgets/qMRMLMarkupsDisplayNodeWidget.cxx#L666

    
      
          }
          
          
//-----------------------------------------------------------------------------
          void qMRMLMarkupsDisplayNodeWidget::onInteractionCheckBoxChanged(int state)
          {
            Q_D(qMRMLMarkupsDisplayNodeWidget);
            if (!d->MarkupsDisplayNode)
              {
              return;
              }
            d->MarkupsDisplayNode->SetHandlesInteractive(state);
          }
          
          
//-----------------------------------------------------------------------------
          void qMRMLMarkupsDisplayNodeWidget::setFillVisibility(bool visibility)
          {
            Q_D(qMRMLMarkupsDisplayNodeWidget);
            if (!d->MarkupsDisplayNode)
              {
              return;
              }

jumbojing · August 20, 2021, 3:34pm

Great! Thanks!
DisplayNode.SetHandlesInteractive(True)

jumbojing · August 20, 2021, 3:54pm

@jamesobutler

Is it possible to further control the position of the “origin” and “rotation” or “translate” of the handle?
是否可以进一步控制handle的"原点"的位置以及"rotation"或者"translate"呢?

jamesobutler · August 20, 2021, 4:00pm

Yes. They are all methods in the Markups Display Node class.

github.com

Slicer/Slicer/blob/39be4408f084b3e5d632b373a4985cd7fa6c661b/Modules/Loadable/Markups/MRML/vtkMRMLMarkupsDisplayNode.cxx#L1044-L1061

    
      
          void vtkMRMLMarkupsDisplayNode::SetHandleVisibility(int componentType, bool visibility)
          {
            switch (componentType)
              {
              case vtkMRMLMarkupsDisplayNode::ComponentTranslationHandle:
                this->SetTranslationHandleVisibility(visibility);
                break;
              case vtkMRMLMarkupsDisplayNode::ComponentRotationHandle:
                this->SetRotationHandleVisibility(visibility);
                break;
              case vtkMRMLMarkupsDisplayNode::ComponentScaleHandle:
                this->SetScaleHandleVisibility(visibility);
                break;
              default:
                vtkErrorMacro("Unknown handle type");
                break;
              }
          }

jumbojing · August 20, 2021, 4:07pm

@jamesobutler

I want the “Origin” of this Handle to be at the end of the line segment instead of the midpoint, how to do it?

我想让这个Handle的原点,在线段的一端而不是中点,怎么做呢?

jamesobutler · August 20, 2021, 4:24pm

That’s not something that I believe is possible at the moment.

jumbojing · August 20, 2021, 4:44pm

@jamesobutler
Thanks

lassoan · August 20, 2021, 6:01pm

You can position a line shaped actor (e.g., that you generated using SlicerIGT extension’s Create Models module) using a transform. You can update the transform from a markups plane node by a few lines of Python code. This technique is used in the Bone Reconstruction Planner extension.

seanchoi0519 · August 21, 2022, 10:07am

Hello, I am trying to find a way to grab 2 planes (generated from markups module) and lock (?) combine them together so when I transform them in position, they move in harmony.

How can I do this programmatically? assuming I have displayNodes of both planes.
Thanks in advance!

seanchoi0519 · August 21, 2022, 1:59pm

Also would there be a way to adjust the size of the interactive handles programmatically?
Thank you & sorry for many questions

jumbojing · August 21, 2022, 2:47pm

没太看懂你的问题, 不过可以看看这个👇或许对你有帮助

I don’t understand your question very well, but you can take a look at this👇 maybe it will help you…
How to rotate OrthogonalSlicesDeg in slices?, getPlaneIntersectionPoint

seanchoi0519 · August 21, 2022, 2:52pm

Thank you, but I do not think it is similar to my problem.
My problem is:

I have 2 plane nodes. I want the relationship between the 2 planes to be fixed. If I move 1 of them, I want the other to move by the same amount, if I rotate 1 of them, I want the other to rotate by the same amount

seanchoi0519 · August 21, 2022, 2:58pm

There appears to be a way to do it on the user interface under “Markups module” then “Interactive handles.” How can I do this programmatically?

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How to display a line with interaction handles by python?

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