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| import os
import random
import dash
import dash_bootstrap_components as dbc
import dash_html_components as html
import dash_core_components as dcc
from dash.dependencies import Input, Output, State
import dash_vtk
from dash_vtk.utils import to_volume_state
import vtk
random.seed(42)
head_vti = "head.vti"
reader = vtk.vtkXMLImageDataReader()
reader.SetFileName(head_vti)
reader.Update()
volume_state = to_volume_state(reader.GetOutput())
sliders = {
"Slice i": dcc.Slider(id="slider-i", min=0, max=256, value=128),
"Slice j": dcc.Slider(id="slider-j", min=0, max=256, value=128),
"Slice k": dcc.Slider(id="slider-k", min=0, max=95, value=47),
"Color Level": dcc.Slider(id="slider-lvl", min=0, max=4095, value=1000),
"Color Window": dcc.Slider(id="slider-window", min=0, max=4095, value=4095),
}
controls = dbc.Card(
body=True,
children=dbc.Row(
[
dbc.Col([dbc.Label(label), component], style={"width": "150px"})
for label, component in sliders.items()
]
),
)
slice_property = {"colorWindow": 4095, "colorLevel": 1000}
slice_view = dash_vtk.View(
id="slice-view",
cameraPosition=[1, 0, 0],
cameraViewUp=[0, 0, -1],
cameraParallelProjection=False,
background=[0.9, 0.9, 1],
children=[
dash_vtk.ShareDataSet(dash_vtk.Volume(state=volume_state)),
dash_vtk.SliceRepresentation(
id="slice-repr-i",
iSlice=128,
property=slice_property,
children=dash_vtk.ShareDataSet(),
),
dash_vtk.SliceRepresentation(
id="slice-repr-j",
jSlice=128,
property=slice_property,
children=dash_vtk.ShareDataSet(),
),
dash_vtk.SliceRepresentation(
id="slice-repr-k",
kSlice=47,
property=slice_property,
children=dash_vtk.ShareDataSet(),
),
],
)
app = dash.Dash(__name__, external_stylesheets=[dbc.themes.BOOTSTRAP])
server = app.server
app.layout = dbc.Container(
fluid=True,
style={"height": "calc(100vh - 30px)"},
children=[
html.Div(
style={"height": "20%", "display": "flex", "alignItems": "center"},
children=[
html.Br(),
controls,
html.Br(),
],
),
html.Div(slice_view, style={"height": "80%"}),
],
)
@app.callback(
[
Output("slice-view", "triggerRender"),
Output("slice-repr-i", "property"),
Output("slice-repr-i", "iSlice"),
Output("slice-repr-j", "property"),
Output("slice-repr-j", "jSlice"),
Output("slice-repr-k", "property"),
Output("slice-repr-k", "kSlice"),
],
[
Input("slider-i", "value"),
Input("slider-j", "value"),
Input("slider-k", "value"),
Input("slider-lvl", "value"),
Input("slider-window", "value"),
],
)
def update_slice_property(i, j, k, level, window):
render_call = random.random()
slice_prop = {"colorLevel": level, "colorWindow": window}
return render_call, slice_prop, i, slice_prop, j, slice_prop, k
if __name__ == "__main__":
app.run_server(debug=True)
|
