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r"""
Installation requirements:
pip install trame trame-vuetify trame-vtk trame-components
"""
from vtkmodules.vtkIOXML import vtkXMLPolyDataReader
from vtkmodules.web.utils import mesh as vtk_mesh
from trame.app import get_server
from trame.app.file_upload import ClientFile
from trame.ui.vuetify import SinglePageLayout
from trame.widgets import trame, vuetify
from trame.widgets import vtk as vtk_widgets
# -----------------------------------------------------------------------------
# Trame setup
# -----------------------------------------------------------------------------
server = get_server(client_type="vue2")
state, ctrl = server.state, server.controller
# -----------------------------------------------------------------------------
# Callbacks
# -----------------------------------------------------------------------------
@state.change("files")
def load_client_files(files, **kwargs):
if files is None or len(files) == 0:
return
field = "solid"
fields = {
"solid": {"value": "solid", "text": "Solid color", "range": [0, 1]},
}
meshes = []
filesOutput = []
if files and len(files):
if not files[0].get("content"):
return
for file in files:
file = ClientFile(file)
print(f"Load {file.name}")
bytes = file.content
filesOutput.append({"name": file.name, "size": file.size})
reader = vtkXMLPolyDataReader()
reader.ReadFromInputStringOn()
reader.SetInputString(bytes)
reader.Update()
ds = reader.GetOutputAsDataSet(0)
point_arrays = []
pd = ds.GetPointData()
nb_arrays = pd.GetNumberOfArrays()
for i in range(nb_arrays):
array = pd.GetArray(i)
name = array.GetName()
min, max = array.GetRange(-1)
fields[name] = {
"name": name,
"range": [min, max],
"value": name,
"text": name,
"scalarMode": 3,
}
point_arrays.append(name)
cell_arrays = []
cd = ds.GetCellData()
nb_arrays = cd.GetNumberOfArrays()
for i in range(nb_arrays):
array = cd.GetArray(i)
name = array.GetName()
min, max = array.GetRange(-1)
fields[name] = {
"name": name,
"range": [min, max],
"value": name,
"text": name,
"scalarMode": 4,
}
cell_arrays.append(name)
meshes.append(
vtk_mesh(ds, point_arrays=point_arrays, cell_arrays=cell_arrays)
)
state.field = field
state.fields = fields
state.meshes = meshes
state.files = filesOutput
print(f"show {len(meshes)} meshes")
# -----------------------------------------------------------------------------
# Web App setup
# -----------------------------------------------------------------------------
state.trame__title = "File loading"
state.fields = []
state.meshes = []
with SinglePageLayout(server) as layout:
layout.title.set_text("File Loader")
layout.icon.click = ctrl.view_reset_camera
with layout.toolbar:
vuetify.VSpacer()
vuetify.VSelect(
v_model=("field", "solid"),
items=("Object.values(fields)",),
hide_details=True,
dense=True,
style="max-width: 200px;",
classes="mr-4",
)
vuetify.VFileInput(
multiple=True,
show_size=True,
small_chips=True,
truncate_length=25,
v_model=("files", None),
dense=True,
hide_details=True,
style="max-width: 300px;",
accept=".vtp",
__properties=["accept"],
)
vuetify.VProgressLinear(
indeterminate=True, absolute=True, bottom=True, active=("trame__busy",)
)
trame.ClientStateChange(name="meshes", change=ctrl.view_reset_camera)
with layout.content:
with vuetify.VContainer(
fluid=True, classes="pa-0 fill-height", style="position: relative;"
):
with vtk_widgets.VtkView(ref="view") as view:
ctrl.view_reset_camera = view.reset_camera
with vtk_widgets.VtkGeometryRepresentation(
v_for="mesh, idx in meshes",
key=("idx",),
color_data_range=(
"fields[field] && fields[field].range || [0, 1]",
),
mapper=(
"""{
colorByArrayName: field,
scalarMode: fields[field] && fields[field].scalarMode || 3,
interpolateScalarsBeforeMapping: true,
scalarVisibility: field !== 'solid',
}""",
),
):
vtk_widgets.VtkMesh("myMesh", state=("mesh",))
# -----------------------------------------------------------------------------
# CLI
# -----------------------------------------------------------------------------
if __name__ == "__main__":
server.start()
|
