Thanks Luke! I appreciate the suggestions. Looks like there are plenty of options to solve my problem, even if the individual tick color doesn't change.
I put in a PR for the bugfix [1], so we can discuss the best way to go forward on that thread. Thanks for this toolkit, it's helped me out a ton. Chris [1] #519: https://github.com/pyqtgraph/pyqtgraph/pull/519 On Thursday, July 27, 2017 at 6:02:23 PM UTC-4, Christopher Mullins wrote: > > Hi all, > > (1) Question is what it sounds like. The situation is that I'm > prototyping an EEG analysis application, and I'm trying to simulate the > "Select bad channels" functionality in EEGLAB (a MATLAB GUI for this). > This involves plotting sixty-something data channels together separated > vertically, labeling the y-ticks with the name of each channel. When a > user clicks a channel's data, the color should change (see minimal working > example below). > > The trouble is it's easy to see that a certain channel of data is bad, but > sometimes difficult to tell exactly which channel that is ie. the name of > the channel. So I'd like to change the color of the tick label as well. Is > there a way to specify just _one_ particular tick and change its color? > > Happy for any further suggestions on the code. Run it by pasting it into > a file and running python -i filename.py. > > (2) If you look at the comment I've made in my code, I realized that in > order for the sigClicked signal to fire, you need to use a PlotCurveItem > (as in the MouseSelection.py example). If you use a PlotDataItem (which is > returned from PlotItem.plot() [1]) the function connected to the sigClicked > signal won't fire. Is this expected behavior, or a bug? > > Thanks, > Chris > > import pyqtgraph as pq > import numpy as np > win = pq.GraphicsWindow(title="Basic EEG example") > eegplot = win.addPlot(title="Multiple curves") > > # Set up the data sort of like I'll be interacting with it in my > application > channel_names = ['Chan1', 'Chan2', 'Chan3'] > channel_data = [np.sin(np.linspace(0, 20, 1000)), np.sin(np.linspace(1, 21 > , 1000)), np.sin(np.linspace(2, 22, 1000))] > chan_name_to_data = dict(zip(channel_names, channel_data)) > chan_name_to_curve = dict() > > def changeChannelColor(curve): > print("Firing changeChannelColor...") > curve.setPen('r') > > ticklabels = [] > for index, channel_name in enumerate(channel_names): > data = chan_name_to_data[channel_name] > data -= np.mean(data, axis=0) > # separate the channels vertically > offset = index*10 > data += offset > ticklabels.append((offset, channel_name)) > datacurve = pq.PlotCurveItem(y=chan_name_to_data[channel_name], pen= > 'b', clickable=True) > # If you use a PlotDataItem instead, sigClicked does not fire. > #datacurve = pq.PlotDataItem(y=chan_name_to_data[channel_name], > pen='b', clickable=True) > chan_name_to_curve[channel_name] = datacurve > eegplot.addItem(datacurve) > eegplot.getAxis('left').setTicks([ticklabels]) > eegplot.setLabel('bottom', 'Time', units='sec') > > # connect the signals correctly > for channel_name, curve in chan_name_to_curve.items(): > curve.sigClicked.connect(changeChannelColor) > > > > [1] > http://www.pyqtgraph.org/documentation/graphicsItems/plotitem.html#pyqtgraph.PlotItem.plot > > > -- You received this message because you are subscribed to the Google Groups "pyqtgraph" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/pyqtgraph/cc2063de-540a-4dc8-b6c3-6bba99f4e592%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
