docs(example): update pv voi example

examples/07_paraview/WaveletROI/app.py

@@ -1,26 +1,42 @@
+import paraview.web.venv
 from trame.app import get_server
 from trame.ui.vuetify3 import SinglePageWithDrawerLayout
 from trame.widgets import vuetify3 as v3, paraview as pv_widgets
 from trame.decorators import TrameApp, change
 
-from paraview import simple
+from paraview import simple, servermanager
 
 
 @TrameApp()
 class App:
  def __init__(self, server=None):
  self.server = get_server(server, client_type="vue3")
+ self.state.volume = 0
 
- # PV pipeline
+ # Data source
  self.source = simple.Wavelet()
+ self.source.UpdatePipeline()
+
+ # Extract info
+ ds = servermanager.Fetch(self.source)
+ self.origin = ds.GetOrigin()
+ self.spacing = ds.GetSpacing()
+ self.extent = ds.GetExtent()
+
+ # Pipeline
  self.extract = simple.ExtractSubset(
  Input=self.source,
- VOI=[-10, 10, -10, 10, -10, 10],
+ VOI=list(self.extent),
  )
  self.representation = simple.Show(self.extract)
  self.representation.SetRepresentationType("Volume")
  self.view = simple.Render()
 
+ # bbox
+ self.box = simple.Box()
+ self.box_rep = simple.Show(self.box)
+ self.box_rep.SetRepresentationType("Wireframe")
+
  self._build_ui()
 
  @property
@@ -33,32 +49,57 @@ def ctrl(self):
 
  @change("i_range", "j_range", "k_range")
  def update_roi(self, i_range, j_range, k_range, **_):
+ # Update Volume
  self.extract.VOI = [*i_range, *j_range, *k_range]
+
+ # Update box
+ self.box.XLength = self.spacing[0] * (i_range[1] - i_range[0])
+ self.box.YLength = self.spacing[1] * (j_range[1] - j_range[0])
+ self.box.ZLength = self.spacing[2] * (k_range[1] - k_range[0])
+ self.box.Center = [
+ self.origin[0] + 0.5 * self.spacing[0] * (i_range[1] + i_range[0]),
+ self.origin[1] + 0.5 * self.spacing[0] * (j_range[1] + j_range[0]),
+ self.origin[2] + 0.5 * self.spacing[0] * (k_range[1] + k_range[0]),
+ ]
+
+ # Compute volume
+ self.extract.UpdatePipeline()
+ bounds = self.extract.GetDataInformation().GetBounds()
+ self.state.volume = (
+ (bounds[1] - bounds[0]) * (bounds[3] - bounds[2]) * (bounds[5] - bounds[4])
+ )
+
  self.ctrl.view_update()
 
  def _build_ui(self):
  with SinglePageWithDrawerLayout(self.server, full_height=True) as layout:
+ with layout.toolbar:
+ v3.VLabel(
+ "Extent [{{i_range.join(', ')}}, {{j_range.join(', ')}}, {{k_range.join(', ')}}] - Volume: {{ volume }}",
+ classes="mx-2",
+ )
+ v3.VBtn(icon="mdi-crop-free", click=self.ctrl.view_reset_camera)
  with layout.drawer as drawer:
  drawer.width = 300
  with v3.VCol():
  v3.VRangeSlider(
- v_model=("i_range", [-10, 10]),
+ v_model=("i_range", self.extent[0:2]),
  min=-10,
  max=10,
  step=1,
  density="compact",
  hide_details=True,
  )
  v3.VRangeSlider(
- v_model=("j_range", [-10, 10]),
+ v_model=("j_range", self.extent[2:4]),
  min=-10,
  max=10,
  step=1,
  density="compact",
  hide_details=True,
  )
  v3.VRangeSlider(
- v_model=("k_range", [-10, 10]),
+ v_model=("k_range", self.extent[4:]),
  min=-10,
  max=10,
  step=1,
@@ -67,9 +108,10 @@ def _build_ui(self):
  )
 
  with layout.content:
- with v3.VContainer(fluid=True, classes="fill-height"):
+ with v3.VContainer(fluid=True, classes="fill-height pa-0"):
  with pv_widgets.VtkRemoteView(
- self.view, interactive_ratio=1
+ self.view,
+ interactive_ratio=1,
  ) as view:
  self.ctrl.view_update = view.update
  self.ctrl.view_reset_camera = view.reset_camera