def divideScale(self, x1, x2, maxMajSteps, maxMinSteps, stepSize):
''' Reimplements qwt.QwtLinearScaleEngine.divideScale
:return: (qwt.QwtScaleDiv) a scale division whose ticks are aligned with
the natural delta time units '''
interval = qwt.QwtInterval(x1, x2).normalized()
if interval.width() <= 0:
return qwt.QwtScaleDiv()
d_range = interval.width()
if d_range < 2: # 2s
return qwt.QwtLinearScaleEngine.divideScale(
self, x1, x2, maxMajSteps, maxMinSteps, stepSize)
elif d_range < 20: # 20 s
s = 1
elif d_range < 120: # =60s*2 = 2 minutes
s = 10
elif d_range < 1200: # 60s*20 =20 minutes
s = 60
elif d_range < 7200: # 3600s*2 = 2 hours
s = 600
elif d_range < 172800: # 3600s24*2 = 2 days
s = 3600
else:
s = 86400 # 1 day
# calculate a step size that respects the base step (s) and also
# enforces the maxMajSteps
stepSize = s * int(numpy.ceil(float(d_range // s) / maxMajSteps))
return qwt.QwtLinearScaleEngine.divideScale(self, x1, x2, maxMajSteps,
maxMinSteps, stepSize)
def divideScale(self, x1, x2, maxMajSteps, maxMinSteps, stepSize=0.0):
div = qwt.QwtScaleDiv(x1, x2, self._positions, [], [])
div.setTicks(qwt.QwtScaleDiv.MajorTick, self._positions)
return div
def divideScale(self, x1, x2, maxMajSteps, maxMinSteps, stepSize):
''' Reimplements qwt.QwtLinearScaleEngine.divideScale
**Important**: The stepSize parameter is **ignored**.
:return: (qwt.QwtScaleDiv) a scale division whose ticks are aligned with
the natural time units '''
# if stepSize != 0:
# scaleDiv = qwt.QwtLinearScaleEngine.divideScale(self, x1, x2, maxMajSteps, maxMinSteps, stepSize)
# scaleDiv.datetimeLabelFormat = "%Y/%m/%d %H:%M%S.%f"
# return scaleDiv
interval = qwt.QwtInterval(x1, x2).normalized()
if interval.width() <= 0:
return qwt.QwtScaleDiv()
dt1 = datetime.fromtimestamp(interval.minValue())
dt2 = datetime.fromtimestamp(interval.maxValue())
if dt1.year < 1900 or dt2.year > 9999: # limits in time.mktime and datetime
return qwt.QwtScaleDiv()
majticks = []
medticks = []
minticks = []
dx = interval.width()
# = 3600s*24*(365+366) = 2 years (counting a leap year)
if dx > 63072001:
format = "%Y"
for y in range(dt1.year + 1, dt2.year):
dt = datetime(year=y, month=1, day=1)
majticks.append(mktime(dt.timetuple()))
elif dx > 5270400: # = 3600s*24*61 = 61 days
format = "%Y %b"
d = timedelta(days=31)
dt = dt1.replace(day=1, hour=0, minute=0, second=0,
microsecond=0) + d
while (dt < dt2):
# make sure that we are on day 1 (even if always sum 31 days)
dt = dt.replace(day=1)
majticks.append(mktime(dt.timetuple()))
dt += d
elif dx > 172800: # 3600s24*2 = 2 days
format = "%b/%d"
d = timedelta(days=1)
dt = dt1.replace(hour=0, minute=0, second=0, microsecond=0) + d
while (dt < dt2):
majticks.append(mktime(dt.timetuple()))
dt += d
elif dx > 7200: # 3600s*2 = 2hours
format = "%b/%d-%Hh"
d = timedelta(hours=1)
dt = dt1.replace(minute=0, second=0, microsecond=0) + d
while (dt < dt2):
majticks.append(mktime(dt.timetuple()))
dt += d
elif dx > 1200: # 60s*20 =20 minutes
format = "%H:%M"
d = timedelta(minutes=10)
dt = dt1.replace(
minute=(dt1.minute // 10) * 10, second=0, microsecond=0) + d
while (dt < dt2):
majticks.append(mktime(dt.timetuple()))
dt += d
elif dx > 120: # =60s*2 = 2 minutes
format = "%H:%M"
d = timedelta(minutes=1)
dt = dt1.replace(second=0, microsecond=0) + d
while (dt < dt2):
majticks.append(mktime(dt.timetuple()))
dt += d
elif dx > 20: # 20 s
format = "%H:%M:%S"
d = timedelta(seconds=10)
dt = dt1.replace(second=(dt1.second // 10) * 10, microsecond=0) + d
while (dt < dt2):
majticks.append(mktime(dt.timetuple()))
dt += d
elif dx > 2: # 2s
format = "%H:%M:%S"
majticks = list(range(int(x1) + 1, int(x2)))
else: # less than 2s (show microseconds)
scaleDiv = qwt.QwtLinearScaleEngine.divideScale(
self, x1, x2, maxMajSteps, maxMinSteps, stepSize)
self.scaleDraw().setDatetimeLabelFormat("%S.%f")
return scaleDiv
# make sure to comply with maxMajTicks
L = len(majticks)
if L > maxMajSteps:
majticks = majticks[::int(numpy.ceil(float(L) / maxMajSteps))]
scaleDiv = qwt.QwtScaleDiv(interval, minticks, medticks, majticks)
self.scaleDraw().setDatetimeLabelFormat(format)
if x1 > x2:
scaleDiv.invert()
# START DEBUG
# print "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
# for tk in scaleDiv.ticks(scaleDiv.MajorTick):
# print datetime.fromtimestamp(tk).isoformat()
# print "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
# END DEBUG
return scaleDiv