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server.py
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server.py
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from uuid import uuid4
import dash_bootstrap_components as dbc
import plotly.graph_objects as go
from dash import (
MATCH,
ALL,
Input,
Output,
State,
callback_context,
dcc,
html,
no_update,
)
from dash_extensions.enrich import (
DashProxy,
Serverside,
ServersideOutputTransform,
Trigger,
TriggerTransform,
)
from trace_updater import TraceUpdater
from plotly_resampler import FigureResampler
import re
from UI_bloks.plotly_blocks import generate_fig
def run_UI_server(server, data):
# --------------------------------------Globals ---------------------------------------
app = DashProxy(
__name__,
server=server,
suppress_callback_exceptions=True,
external_stylesheets=[dbc.themes.LUX],
transforms=[ServersideOutputTransform(), TriggerTransform()],
)
# -------- Construct the app layout --------
app.layout = html.Div(
[
html.Div(html.H1("Dash application"), style={"textAlign": "center"}),
html.Hr(),
dbc.Row(
[
dbc.Col(
dbc.Form(
[
*([html.Br()] * 2),
dbc.Label("port id", style={"margin-left": "10px"}),
html.Br(),
dcc.Input(
id="nbr-datapoints",
placeholder="n",
value=1000,
type="number",
style={"margin-left": "10px"},
),
*([html.Br()] * 2),
dbc.Button(
"Create new graph",
id="add-graph-btn",
color="primary",
style={
"textalign": "center",
"width": "max-content",
"margin-left": "10px",
},
),
*([html.Br()] * 2),
],
),
style={"align": "top"},
md=2,
),
dbc.Col(html.Div(id="graph-container"), md=10),
],
),
]
)
# ------------------------------------ DASH logic -------------------------------------
# This method adds the needed components to the front-end, but does not yet contain the
# FigureResampler graph construction logic.
@app.callback(
Output("graph-container", "children"),
Input("add-graph-btn", "n_clicks"),
Input({"type": "remove-graph-btn", "index": ALL}, "n_clicks"),
[
State("nbr-datapoints", "value"),
State("graph-container", "children"),
State({"type": "remove-graph-btn", "index": ALL}, "id"),
],
prevent_initial_call=True,
)
def add_or_remove_graph(
add_graph, remove_graph, port_id, gc_children, remove_btn_id
):
#### check of existance such data with demanded port ####
try:
data[str(port_id)]
except KeyError as e:
return no_update
#### Remove graph ####
gc_children = [] if gc_children is None else gc_children
clicked_btn = callback_context.triggered[0]["prop_id"].split(".")[0]
if "remove-graph" in clicked_btn:
if not len(gc_children):
return no_update
new_children = []
btn_index = re.search('"index":"(.*)",', clicked_btn).group(1)
for child in gc_children:
if child["props"]["id"]["index"] != btn_index:
new_children.append(child)
return new_children
#### create a new graph ####
if add_graph is None or port_id is None:
return no_update
uid = str(uuid4())
new_child = html.Div(
id={"type": "dynamic-graph-container", "index": uid},
children=[
dcc.Graph(
id={"type": "dynamic-graph", "index": uid}, figure=go.Figure()
),
dcc.Loading(dcc.Store(id={"type": "store", "index": uid})),
TraceUpdater(
id={"type": "dynamic-updater", "index": uid}, gdID=f"{uid}"
),
dcc.Interval(
id={"type": "interval", "index": uid}, max_intervals=1, interval=1
),
dcc.Interval(
id={"type": "interval-data-update", "index": uid},
interval=2000, # im ms
n_intervals=0,
),
dbc.Button(
"Remove graph",
id={"type": "remove-graph-btn", "index": uid},
color="danger",
style={
"textalign": "center",
"width": "max-content",
"margin-left": "10px",
},
),
],
)
gc_children.append(new_child)
return gc_children
##------------------------------- Update data in graph --------------------------------------##
@app.callback(
Output(
{"type": "dynamic-graph", "index": MATCH}, "figure", allow_duplicate=True
),
Input({"type": "interval-data-update", "index": MATCH}, "n_intervals"),
State({"type": "dynamic-graph", "index": MATCH}, "id"),
State({"type": "dynamic-graph", "index": MATCH}, "figure"),
prevent_initial_call=True,
)
def update_data_in_graph(n_intervals, id, fig):
data_pointer = None
for port_id in data.keys():
if id["index"] in data[port_id]["active_in"]:
data_pointer = data[port_id]
break
if data_pointer is None:
raise Exception("LOOOL")
if data_pointer["is_changed"] == False:
return fig
x = data_pointer["x"]
y = data_pointer["y"]
fr = generate_fig(x, y, title=data_pointer["title"])
Serverside(fr)
data_pointer["is_changed"] = False
return fr
##-------------------------------- FOR plotly resample updates ------------------------------##
# This method constructs the FigureResampler graph and caches it on the server side
@app.callback(
Output({"type": "dynamic-graph", "index": MATCH}, "figure"),
Output({"type": "store", "index": MATCH}, "data"),
State("nbr-datapoints", "value"),
# State("add-graph-btn", "n_clicks"),
State({"type": "dynamic-graph", "index": MATCH}, "id"),
Trigger({"type": "interval", "index": MATCH}, "n_intervals"),
prevent_initial_call=True,
)
def construct_display_graph(port_id, container_id) -> FigureResampler:
## save index of active containers in data
container_index = container_id["index"]
data_index = str(port_id)
data[data_index]["active_in"].append(container_index)
## generate gfaph from data
port_data = data[data_index]
x = port_data["x"]
y = port_data["y"]
fr = generate_fig(x, y, title=port_data["title"])
return fr, Serverside(fr)
@app.callback(
Output({"type": "dynamic-updater", "index": MATCH}, "updateData"),
Input({"type": "dynamic-graph", "index": MATCH}, "relayoutData"),
State({"type": "store", "index": MATCH}, "data"),
prevent_initial_call=True,
memoize=True,
)
def update_fig(relayoutdata: dict, fig: FigureResampler):
if fig is not None:
return fig.construct_update_data(relayoutdata)
return no_update
# --------------------------------- Running the app ---------------------------------
app.run_server(debug=True, port=9023)