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May 9, 2018
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Improved example #4

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59 changes: 36 additions & 23 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,7 @@ cd django-plotly-dash
To use existing dash applications, first register them using the `DelayedDash` class. This
replaces the `dash.Dash` class of `plotly.py.`

Taking as an example a slightly modified variant of one of the [getting started](https://dash.plot.ly/getting-started-part-2) examples:
Taking a very simple example inspired by the excellent [getting started](https://dash.plot.ly/) documentation:

```python
import dash
Expand All @@ -52,39 +52,52 @@ import dash_html_components as html

from django_plotly_dash import DelayedDash

app = DelayedDash('SimpleExample') # replaces dash.Dash
app = DelayedDash('SimpleExample')

app.layout = html.Div([
dcc.RadioItems(
id='dropdown-a',
options=[{'label': i, 'value': i} for i in ['Canada', 'USA', 'Mexico']],
value='Canada'
id='dropdown-color',
options=[{'label': c, 'value': c.lower()} for c in ['Red', 'Green', 'Blue']],
value='red'
),
html.Div(id='output-a'),

html.Div(id='output-color'),
dcc.RadioItems(
id='dropdown-b',
options=[{'label': i, 'value': i} for i in ['MTL', 'NYC', 'SF']],
value='MTL'
id='dropdown-size',
options=[{'label': i, 'value': j} for i, j in [('L','large'), ('M','medium'), ('S','small')]],
value='medium'
),
html.Div(id='output-b')
html.Div(id='output-size')

])

@app.callback(
dash.dependencies.Output('output-a', 'children'),
[dash.dependencies.Input('dropdown-a', 'value')])
def callback_a(dropdown_value):
return 'You\'ve selected "{}"'.format(dropdown_value)

dash.dependencies.Output('output-color', 'children'),
[dash.dependencies.Input('dropdown-color', 'value')])
def callback_color(dropdown_value):
return "The selected color is %s." % dropdown_value

@app.callback(
dash.dependencies.Output('output-b', 'children'),
[dash.dependencies.Input('dropdown-a', 'value'),
dash.dependencies.Input('dropdown-b', 'value')])
def callback_b(dropdown_value,other_dd):
return 'You\'ve selected "{}" and "{}"'.format(dropdown_value,
other_dd)
dash.dependencies.Output('output-size', 'children'),
[dash.dependencies.Input('dropdown-color', 'value'),
dash.dependencies.Input('dropdown-size', 'value')])
def callback_size(dropdown_color, dropdown_size):
return "The chosen T-shirt is a %s %s one." %(dropdown_size,
dropdown_color)

a2 = DelayedDash("Ex2")
a2.layout = html.Div([
dcc.RadioItems(id="dropdown-one",options=[{'label':i,'value':j} for i,j in [
("O2","Oxygen"),("N2","Nitrogen"),]
],value="Oxygen"),
html.Div(id="output-one")
])

@a2.callback(
dash.dependencies.Output('output-one','children'),
[dash.dependencies.Input('dropdown-one','value')]
)
def callback_c(*args,**kwargs):
return "Args are %s and kwargs are %s" %("".join(*args),str(kwargs))
```

Note that the `DelayedDash` constructor requires a name to be specified. This name is then used to identify the dash app in
Expand All @@ -96,7 +109,7 @@ templates:
{% plotly_item "SimpleExample" %}
```

Note that the registration code needs to be in a location
The registration code needs to be in a location
that will be imported into the Django process before any template tag attempts to use it. The example Django application
in the demo subdirectory achieves this through an import in the main urls.py file; any views.py would also be sufficient.

38 changes: 18 additions & 20 deletions demo/demo/plotly_apps.py
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Expand Up @@ -8,35 +8,33 @@

app.layout = html.Div([
dcc.RadioItems(
id='dropdown-a',
options=[{'label': i, 'value': i} for i in ['Canada', 'USA', 'Mexico']],
value='Canada'
id='dropdown-color',
options=[{'label': c, 'value': c.lower()} for c in ['Red', 'Green', 'Blue']],
value='red'
),
html.Div(id='output-a'),

html.Div(id='output-color'),
dcc.RadioItems(
id='dropdown-b',
options=[{'label': i, 'value': i} for i in ['MTL', 'NYC', 'SF']],
value='MTL'
id='dropdown-size',
options=[{'label': i, 'value': j} for i, j in [('L','large'), ('M','medium'), ('S','small')]],
value='medium'
),
html.Div(id='output-b')
html.Div(id='output-size')

])

@app.callback(
dash.dependencies.Output('output-a', 'children'),
[dash.dependencies.Input('dropdown-a', 'value')])
def callback_a(dropdown_value):
return 'You\'ve selected "{}"'.format(dropdown_value)

dash.dependencies.Output('output-color', 'children'),
[dash.dependencies.Input('dropdown-color', 'value')])
def callback_color(dropdown_value):
return "The selected color is %s." % dropdown_value

@app.callback(
dash.dependencies.Output('output-b', 'children'),
[dash.dependencies.Input('dropdown-a', 'value'),
dash.dependencies.Input('dropdown-b', 'value')])
def callback_b(dropdown_value,other_dd):
return 'You\'ve selected "{}" and "{}"'.format(dropdown_value,
other_dd)
dash.dependencies.Output('output-size', 'children'),
[dash.dependencies.Input('dropdown-color', 'value'),
dash.dependencies.Input('dropdown-size', 'value')])
def callback_size(dropdown_color, dropdown_size):
return "The chosen T-shirt is a %s %s one." %(dropdown_size,
dropdown_color)

a2 = DelayedDash("Ex2")
a2.layout = html.Div([
Expand Down
1 change: 0 additions & 1 deletion docs/index.rst
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Expand Up @@ -11,7 +11,6 @@ Contents

.. toctree::
:maxdepth: 2
:caption: Contents:

installation
simple_use
Expand Down
39 changes: 19 additions & 20 deletions docs/simple_use.rst
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Expand Up @@ -18,35 +18,34 @@ Taking as an example a slightly modified variant of one of the `getting started

app.layout = html.Div([
dcc.RadioItems(
id='dropdown-a',
options=[{'label': i, 'value': i} for i in ['Canada', 'USA', 'Mexico']],
value='Canada'
id='dropdown-color',
options=[{'label': c, 'value': c.lower()} for c in ['Red', 'Green', 'Blue']],
value='red'
),
html.Div(id='output-a'),

html.Div(id='output-color'),
dcc.RadioItems(
id='dropdown-b',
options=[{'label': i, 'value': i} for i in ['MTL', 'NYC', 'SF']],
value='MTL'
id='dropdown-size',
options=[{'label': i,
'value': j} for i, j in [('L','large'), ('M','medium'), ('S','small')]],
value='medium'
),
html.Div(id='output-b')
html.Div(id='output-size')

])

@app.callback(
dash.dependencies.Output('output-a', 'children'),
[dash.dependencies.Input('dropdown-a', 'value')])
def callback_a(dropdown_value):
return 'You\'ve selected "{}"'.format(dropdown_value)

dash.dependencies.Output('output-color', 'children'),
[dash.dependencies.Input('dropdown-color', 'value')])
def callback_color(dropdown_value):
return "The selected color is %s." % dropdown_value

@app.callback(
dash.dependencies.Output('output-b', 'children'),
[dash.dependencies.Input('dropdown-a', 'value'),
dash.dependencies.Input('dropdown-b', 'value')])
def callback_b(dropdown_value,other_dd):
return 'You\'ve selected "{}" and "{}"'.format(dropdown_value,
other_dd)
dash.dependencies.Output('output-size', 'children'),
[dash.dependencies.Input('dropdown-color', 'value'),
dash.dependencies.Input('dropdown-size', 'value')])
def callback_size(dropdown_color, dropdown_size):
return "The chosen T-shirt is a %s %s one." %(dropdown_size,
dropdown_color)

Note that the ``DelayedDash`` constructor requires a name to be specified. This name is then used to identify the dash app in
templates:::
Expand Down