DOC: Add vtkUnstructuredGrid example

.gitignore

@@ -24,6 +24,7 @@ examples/emdata_janelia_822252.zip
 examples/General_EduRes_Heart_BloodVessels_0.jpg
 examples/cow.vtk
 examples/Bunny.vtp
+examples/uGridEx.vtk
 
 js/lib/ZstdDecompress/web-build/
 .pytest_cache/

README.rst

@@ -40,6 +40,7 @@ point sets, and meshes.
 
   - itk.Mesh
   - vtk.vtkPolyData
+  - vtk.vtkUnstructuredGrid
   - pyvista.PolyData
 
 - Exquisite volume rendering
@@ -208,6 +209,7 @@ After installation, try the following examples that demonstrate how to visualize
 - `NumPy array point sets <https://github.com/InsightSoftwareConsortium/itk-jupyter-widgets/blob/master/examples/NumPyArrayPointSet.ipynb>`_
 - `ITK Mesh <https://github.com/InsightSoftwareConsortium/itk-jupyter-widgets/blob/master/examples/Mesh.ipynb>`_
 - `VTK vtkPolyData <https://github.com/InsightSoftwareConsortium/itk-jupyter-widgets/blob/master/examples/vtkPolyData.ipynb>`_
+- `VTK vtkUnstructuredGrid <https://github.com/InsightSoftwareConsortium/itk-jupyter-widgets/blob/master/examples/vtkUnstructuredGrid.ipynb>`_
 - `pyvista PolyData <https://github.com/InsightSoftwareConsortium/itk-jupyter-widgets/blob/master/examples/pyvista.PolyData.ipynb>`_
 
 or how to:

examples/vtkUnstructuredGrid.ipynb

@@ -0,0 +1,103 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Install dependencies for this example\n",
+    "# Note: This does not include itk-jupyter-widgets, itself\n",
+    "import sys\n",
+    "!{sys.executable} -m pip install vtk"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "try:\n",
+    "    from urllib.request import urlretrieve\n",
+    "except ImportError:\n",
+    "    from urllib import urlretrieve\n",
+    "import os\n",
+    "\n",
+    "import vtk\n",
+    "\n",
+    "from itkwidgets import view"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Download data\n",
+    "file_name = 'uGridEx.vtk'\n",
+    "if not os.path.exists(file_name):\n",
+    "    url = 'https://data.kitware.com/api/v1/file/5d3752c2877dfcc9022724d9/download'\n",
+    "    urlretrieve(url, file_name)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "reader = vtk.vtkUnstructuredGridReader()\n",
+    "reader.SetFileName(file_name)\n",
+    "reader.Update()\n",
+    "grid = reader.GetOutput()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "e3a736c9242d44ec9d2de69d1b17df2d",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "Viewer(geometries=[{'vtkClass': 'vtkPolyData', 'points': {'vtkClass': 'vtkPoints', 'name': '_points', 'numberO…"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "view(geometries=grid)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.6.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}