forked from M-Labs/artiq
70 lines
2.6 KiB
Python
70 lines
2.6 KiB
Python
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#!/usr/bin/env python3.5
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from pyqtgraph.Qt import QtGui, QtCore
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import pyqtgraph as pg
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import numpy as np
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class XYHistPlot:
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def __init__(self):
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self.graphics_window = pg.GraphicsWindow(title="XY/Histogram")
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self.graphics_window.resize(1000,600)
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self.graphics_window.setWindowTitle("XY/Histogram")
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self.xy_plot = self.graphics_window.addPlot()
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self.xy_plot_data = None
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self.arrow = None
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self.hist_plot = self.graphics_window.addPlot()
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self.hist_plot_data = None
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def set_data(self, xs, histograms_bins, histograms_counts):
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ys = np.empty_like(xs)
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ys.fill(np.nan)
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for n, (bins, counts) in enumerate(zip(histograms_bins,
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histograms_counts)):
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bin_centers = np.empty(len(bins)-1)
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for i in range(len(bin_centers)):
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bin_centers[i] = (bins[i] + bins[i+1])/2
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ys[n] = sum(bin_centers*counts)/sum(bin_centers)
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self.xy_plot_data = self.xy_plot.plot(x=xs, y=ys,
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pen=None,
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symbol="x", symbolSize=20)
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self.xy_plot_data.sigPointsClicked.connect(self.point_clicked)
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for point, bins, counts in zip(self.xy_plot_data.scatter.points(),
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histograms_bins, histograms_counts):
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point.histogram_bins = bins
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point.histogram_counts = counts
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self.hist_plot_data = self.hist_plot.plot(
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stepMode=True, fillLevel=0,
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brush=(0, 0, 255, 150))
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def point_clicked(self, data_item, spot_items):
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spot_item = spot_items[0]
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position = spot_item.pos()
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if self.arrow is None:
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self.arrow = pg.ArrowItem(angle=-120, tipAngle=30, baseAngle=20,
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headLen=40, tailLen=40, tailWidth=8,
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pen=None, brush="y")
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self.arrow.setPos(position)
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# NB: temporary glitch if addItem is done before setPos
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self.xy_plot.addItem(self.arrow)
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else:
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self.arrow.setPos(position)
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self.hist_plot_data.setData(x=spot_item.histogram_bins,
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y=spot_item.histogram_counts)
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def main():
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app = QtGui.QApplication([])
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plot = XYHistPlot()
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plot.set_data(np.array([1, 2, 3, 4, 1]),
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np.array([[1, 2, 3], [1, 2, 3], [1, 2, 3], [40, 70, 100], [4, 7, 10, 20]]),
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np.array([[1, 1], [2, 3], [10, 20], [3, 1], [100, 67, 102]]))
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app.exec_()
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if __name__ == '__main__':
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main()
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