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Use new DateAxisItem in Plot Customization example #1

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Apr 8, 2020
Merged

Use new DateAxisItem in Plot Customization example #1

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38 changes: 2 additions & 36 deletions examples/customPlot.py
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Original file line number Diff line number Diff line change
Expand Up @@ -12,40 +12,6 @@
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)
Expand All @@ -65,10 +31,10 @@ def mouseDragEvent(self, ev):

app = pg.mkQApp()

axis = DateAxis(orientation='bottom')
axis = pg.DateAxisItem(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")
pw = pg.PlotWidget(viewBox=vb, axisItems={'bottom': axis}, enableMenu=False, title="PlotItem with DateAxisItem and custom 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()
Expand Down