85 lines
2.7 KiB
Python
85 lines
2.7 KiB
Python
# -*- coding: utf-8 -*-
|
|
"""
|
|
This example demonstrates the creation of a plot with a customized
|
|
AxisItem and ViewBox.
|
|
"""
|
|
|
|
|
|
import initExample ## Add path to library (just for examples; you do not need this)
|
|
|
|
import pyqtgraph as pg
|
|
from pyqtgraph.Qt import QtCore, QtGui
|
|
import numpy as np
|
|
import time
|
|
|
|
class DateAxis(pg.AxisItem):
|
|
def tickStrings(self, values, scale, spacing):
|
|
strns = []
|
|
rng = max(values)-min(values)
|
|
#if rng < 120:
|
|
# return pg.AxisItem.tickStrings(self, values, scale, spacing)
|
|
if rng < 3600*24:
|
|
string = '%H:%M:%S'
|
|
label1 = '%b %d -'
|
|
label2 = ' %b %d, %Y'
|
|
elif rng >= 3600*24 and rng < 3600*24*30:
|
|
string = '%d'
|
|
label1 = '%b - '
|
|
label2 = '%b, %Y'
|
|
elif rng >= 3600*24*30 and rng < 3600*24*30*24:
|
|
string = '%b'
|
|
label1 = '%Y -'
|
|
label2 = ' %Y'
|
|
elif rng >=3600*24*30*24:
|
|
string = '%Y'
|
|
label1 = ''
|
|
label2 = ''
|
|
for x in values:
|
|
try:
|
|
strns.append(time.strftime(string, time.localtime(x)))
|
|
except ValueError: ## Windows can't handle dates before 1970
|
|
strns.append('')
|
|
try:
|
|
label = time.strftime(label1, time.localtime(min(values)))+time.strftime(label2, time.localtime(max(values)))
|
|
except ValueError:
|
|
label = ''
|
|
#self.setLabel(text=label)
|
|
return strns
|
|
|
|
class CustomViewBox(pg.ViewBox):
|
|
def __init__(self, *args, **kwds):
|
|
pg.ViewBox.__init__(self, *args, **kwds)
|
|
self.setMouseMode(self.RectMode)
|
|
|
|
## reimplement right-click to zoom out
|
|
def mouseClickEvent(self, ev):
|
|
if ev.button() == QtCore.Qt.RightButton:
|
|
self.autoRange()
|
|
|
|
def mouseDragEvent(self, ev):
|
|
if ev.button() == QtCore.Qt.RightButton:
|
|
ev.ignore()
|
|
else:
|
|
pg.ViewBox.mouseDragEvent(self, ev)
|
|
|
|
|
|
app = pg.mkQApp()
|
|
|
|
axis = DateAxis(orientation='bottom')
|
|
vb = CustomViewBox()
|
|
|
|
pw = pg.PlotWidget(viewBox=vb, axisItems={'bottom': axis}, enableMenu=False, title="PlotItem with custom axis and ViewBox<br>Menu disabled, mouse behavior changed: left-drag to zoom, right-click to reset zoom")
|
|
dates = np.arange(8) * (3600*24*356)
|
|
pw.plot(x=dates, y=[1,6,2,4,3,5,6,8], symbol='o')
|
|
pw.show()
|
|
pw.setWindowTitle('pyqtgraph example: customPlot')
|
|
|
|
r = pg.PolyLineROI([(0,0), (10, 10)])
|
|
pw.addItem(r)
|
|
|
|
## Start Qt event loop unless running in interactive mode or using pyside.
|
|
if __name__ == '__main__':
|
|
import sys
|
|
if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
|
|
QtGui.QApplication.instance().exec_()
|