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docs(widget): update box example listener with corners property #13

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Aug 30, 2024
Merged

docs(widget): update box example listener with corners property #13

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21 changes: 12 additions & 9 deletions examples/vtk/widgets_box.py
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@
from vtkmodules.vtkInteractionStyle import vtkInteractorStyleSwitch # noqa

from vtkmodules.vtkCommonColor import vtkNamedColors
from vtkmodules.vtkCommonTransforms import vtkTransform
from vtkmodules.vtkFiltersSources import vtkConeSource
from vtkmodules.vtkInteractionWidgets import vtkBoxWidget2, vtkBoxRepresentation
from vtkmodules.vtkRenderingCore import (
Expand All @@ -28,7 +29,7 @@ def create_vtk_pipeline():
cone.SetResolution(20)
coneMapper = vtkPolyDataMapper()
coneMapper.SetInputConnection(cone.GetOutputPort())
coneActor = vtkActor()
coneActor = vtkActor(user_transform=vtkTransform())
coneActor.SetMapper(coneMapper)
coneActor.GetProperty().SetColor(colors.GetColor3d("BurlyWood"))

Expand All @@ -40,7 +41,7 @@ def create_vtk_pipeline():
renderer.SetBackground(colors.GetColor3d("Blue"))
renderer.AddActor(coneActor)

renwin = vtkRenderWindow()
renwin = vtkRenderWindow(off_screen_rendering=True)
renwin.AddRenderer(renderer)

# An interactor
Expand Down Expand Up @@ -91,9 +92,11 @@ def _on_widget_update(self, widget_state, **_):
if widget_state is None:
return

print(f"{widget_state=}")
# Get new widget corners from state.
self.widget.representation.corners = widget_state.get("corners")
# Compute user transform for the actor from the new corners.
self.widget.representation.GetTransform(self.actor.user_transform)

self.actor.user_transform.SetMatrix(widget_state.get("transform"))
self.html_view.update_throttle()

def toggle_listeners(self):
Expand All @@ -104,10 +107,10 @@ def toggle_listeners(self):
self.widget_id: {
"InteractionEvent": {
"widget_state": {
"transform": (
"corners": (
self.widget_id,
"WidgetRepresentation",
"Transform",
"Corners",
),
}
}
Expand All @@ -118,10 +121,10 @@ def one_time_update(self):
self.html_view.eval(
{
"widget_state": {
"transform": (
"corners": (
self.widget_id,
"WidgetRepresentation",
"Transform",
"Corners",
),
}
}
Expand All @@ -136,7 +139,7 @@ def _ui(self):
style="position: absolute; left: 1rem; top: 1rem; z-index: 10;",
)
html.Button(
"Update cut",
"Update transformation matrix",
click=self.one_time_update,
style="position: absolute; right: 1rem; top: 1rem; z-index: 10;",
)
Expand Down
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