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"""
Demonstrates the usage of DateAxisItem in a layout created with Qt Designer.
The spotlight here is on the 'setAxisItems' method, without which
one would have to subclass plotWidget in order to attach a dateaxis to it.
"""
import os
import time
import numpy as np
import pyqtgraph as pg
from pyqtgraph.Qt import QtWidgets, loadUiType
pg.setConfigOption('background', 'w')
pg.setConfigOption('foreground', 'k')
BLUE = pg.mkPen('#1f77b4')
path = os.path.dirname(os.path.abspath(__file__))
uiFile = os.path.join(path, 'DateAxisItem_QtDesigner.ui')
Design, _ = loadUiType(uiFile)
class ExampleApp(QtWidgets.QMainWindow, Design):
def __init__(self):
super().__init__()
self.setupUi(self)
now = time.time()
# Plot random values with timestamps in the last 6 months
timestamps = np.linspace(now - 6*30*24*3600, now, 100)
self.curve = self.plotWidget.plot(x=timestamps, y=np.random.rand(100),
symbol='o', symbolSize=5, pen=BLUE)
# 'o' circle 't' triangle 'd' diamond '+' plus 's' square
self.plotWidget.setAxisItems({'bottom': pg.DateAxisItem()})
self.plotWidget.showGrid(x=True, y=True)
app = pg.mkQApp("DateAxisItem_QtDesigner Example")
window = ExampleApp()
window.setWindowTitle('pyqtgraph example: DateAxisItem_QtDesigner')
window.show()
if __name__ == '__main__':
pg.exec()
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