I’m using version 0.11.0dev
Here is a quick dummy example ripping off the sliders server example in the gallery that closely resembles in principle what I’m trying to do. Note that when you change a parameter selection, the slider will begin to control that parameter, but the start, end, and step values will not adjust accordingly. Any suggestions as to what I might be missing?
import numpy as np
from bokeh.plotting import Figure
from bokeh.models import ColumnDataSource
from bokeh.models.widgets import HBox, Slider, VBoxForm, Select
from bokeh.client import push_session
from bokeh.document import Document
class sinplotter(object):
def init(self, N=200):
self.document = Document()
self.params = {‘amplitude’: 1,
‘frequency’: 1,
‘phase’: 0,
‘offset’: 0
}
self.param_limits = {‘amplitude’: [-5.0, 5.0, 0.2],
‘frequency’: [0.1, 5.1, 0.1],
‘phase’: [0, 2np.pi, 2np.pi/50],
‘offset’: [-5.0, 5.0, 0.1]
}
keys = self.params.keys()
self.selectors = {n: Select(title=“Parameter %i” % (n+1),
value=keys[n],
options=keys)
for n in range(2)
}
self.sliders = {n: Slider(value=self.params[keys[n]],
start=self.param_limits[keys[n]][0],
end=self.param_limits[keys[n]][1],
step=self.param_limits[keys[n]][2]
)
for n in range(2)
}
selection_layout = VBoxForm(children=[VBoxForm(children=[self.selectors[n],
self.sliders[n]
]
) for n in range(2)
]
)
for slider in self.sliders.values():
slider.on_change(‘value’, self.update_sliders)
self.selector_values = {}
for num, selector in self.selectors.items():
selector.on_change(‘value’, self.update_selectors)
self.selector_values[num] = selector.value
self.resetting_selectors = False # keeps from updating plot when we update selection
self.N = N
self.source = ColumnDataSource()
self.update_data()
plot = Figure(plot_height=400, plot_width=400, title=“my sine wave”,
tools=“crosshair,pan,reset,resize,save,wheel_zoom”,
x_range=[0, 4*np.pi], y_range=[-2.5, 2.5]
)
plot.line(‘x’, ‘y’, source=self.source, line_width=3, line_alpha=0.6)
self.document.add(HBox(selection_layout, plot))
self.session = push_session(self.document)
def update_selectors(self, attrname, old, new):
self.resetting_selectors = True # don’t update plot
for num in range(2):
param_name = self.selectors[num].value
if param_name == self.selector_values[num]: # don’t update
continue
self.selector_values[num] = param_name
slider = self.sliders[num]
slider.value = self.params[param_name] # this calls update_sliders
slider.start = self.param_limits[param_name][0]
slider.end = self.param_limits[param_name][1]
slider.step = self.param_limits[param_name][2]
self.resetting_selectors = False # ok to start updating plot again
def update_sliders(self, attrname, old, new):
if self.resetting_selectors:
return
for num in range(2):
self.params[self.selectors[num].value] = self.sliders[num].value
self.update_data()
def update_data(self):
a = self.params[‘amplitude’]
b = self.params[‘offset’]
w = self.params[‘phase’]
k = self.params[‘frequency’]
x = np.linspace(0, 4*np.pi, self.N)
y = anp.sin(kx + w) + b
self.source.data = dict(x=x, y=y)
def run(self, do_view=False, poll_interval=0.5):
if do_view:
self.session.show()
self.session.loop_until_closed()
if name == “main”:
plotter = sinplotter()
plotter.run(do_view=True)
···
On Thursday, November 19, 2015 at 5:49:47 AM UTC-8, Havoc Pennington wrote:
Which version of server, 0.10 or 0.11dev?
This should work in 0.11.dev I think, if not can you share a full running example showing the issue so we can debug?
In 0.10 it’s harder to say; there are several ways to do things in 0.10 and “it depends.”
Havoc
On Nov 18, 2015, at 8:09 PM, Alec Gunny [email protected] wrote:
Hey all,
I’ve started playing with bokeh server applications recently after deciding that my affection for/skill with java was falling far behind that required for some of the applications I wanted to implement. I’ve really loved the extent to which it’s opened up my plotting capabilities, but I’ve run into a bit of a wall with one specific application recently. I want a set of sliders that will control a large number of attributes (which take on values in various ranges and scales). I would like to keep a small number of sliders on the screen at once (say three or four), and have a selection box tied to each one that selects the parameter for that slider to control. Therefore, in the on_change function for the selection boxes, I would like to be able to control the start, end, step, and value of the slider tied to the box. Right now, I do this by simply calling (where param is the current value of slider’s selection box)
slider.start = data[param].min()
slider.end = data[param].max()
…etc.
But this doesn’t seem to be working. Is this currently possible, or should I start looking for an alternative solution?
-Alec
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