Hello, I have pyqt4 GUI app with graph access button. Everything works ok,
except every time button is pressed warning message is appeared.
Button pressed calls bottom method "graph_all". So, what I am doing wrong
or how to avoid this message? Modul graph_1.py is attached here to show the
code.
*Message 1 every time button is pressed:* QGridLayoutEngine::addItem: Cell
(3, 1) already taken
*Message 2 only first time button is pressed:*
/home/pi/Project/main.py:538: RuntimeWarning: Visible window deleted. To
prevent this, store a reference to the window object.
sys.exit(app.exec_())
Regards Vlado
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import time
import sys
import pyqtgraph as pg
from PyQt4 import QtGui
import numpy
from pyqtgraph import AxisItem
from datetime import datetime, timedelta
from time import mktime
pg.setConfigOptions(antialias=True)
pg.setConfigOption('background', '#c7c7c7')
pg.setConfigOption('foreground', '#000000')
#-------------------------------------------------------------------------------
OUT_Buffer_Temperatura = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0] # 241 spominskih mest
#-------------------------------------------------------------------------------
OUT_Buffer_Temp_SetPoint = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0]
#-------------------------------------------------------------------------------
OUT_Buffer_Regulator = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0]
#-------------------------------------------------------------------------------
OUT_Buffer_Output = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0]
#------------------------------------------------------------------------------
class DateAxisItem(AxisItem):
"""
A tool that provides a date-time aware axis. It is implemented as an
AxisItem that interpretes positions as unix timestamps (i.e. seconds
since 1970).
The labels and the tick positions are dynamically adjusted depending
on the range.
It provides a :meth:`attachToPlotItem` method to add it to a given
PlotItem
"""
# Max width in pixels reserved for each label in axis
_pxLabelWidth = 80
#_pxLabelWidth = 200
def __init__(self, *args, **kwargs):
AxisItem.__init__(self, *args, **kwargs)
self._oldAxis = None
def tickValues(self, minVal, maxVal, size):
"""
Reimplemented from PlotItem to adjust to the range and to force
the ticks at "round" positions in the context of time units instead of
rounding in a decimal base
"""
maxMajSteps = int(size/self._pxLabelWidth)
#print(maxMajSteps)
dt1 = datetime.fromtimestamp(minVal)
dt2 = datetime.fromtimestamp(maxVal)
#print(dt1, dt2)
dx = maxVal - minVal
majticks = []
if dx > 63072001: # 3600s*24*(365+366) = 2 years (count leap year)
d = timedelta(days=366)
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
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
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
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
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
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: # 20s
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
d = timedelta(seconds=1)
majticks = range(int(minVal), int(maxVal))
else: # <2s , use standard implementation from parent
return AxisItem.tickValues(self, minVal, maxVal, size)
L = len(majticks)
if L > maxMajSteps:
majticks = majticks[::int(numpy.ceil(float(L) / maxMajSteps))]
return [(d.total_seconds(), majticks)]
def tickStrings(self, values, scale, spacing):
"""Reimplemented from PlotItem to adjust to the range"""
ret = []
if not values:
return []
if spacing >= 31622400: # 366 days
fmt = "%Y"
elif spacing >= 2678400: # 31 days
fmt = "%Y %b"
elif spacing >= 86400: # = 1 day
fmt = "%b/%d"
elif spacing >= 3600: # 1 h
#fmt = "%b/%d-%Hh"
fmt = "%Hh"
elif spacing >= 60: # 1 m
fmt = "%H:%M"
elif spacing >= 1: # 1s
fmt = "%H:%M:%S"
else:
# less than 2s (show microseconds)
# fmt = '%S.%f"'
fmt = '[+%fms]' # explicitly relative to last second
for x in values:
try:
t = datetime.fromtimestamp(x)
ret.append(t.strftime(fmt))
except ValueError: # Windows can't handle dates before 1970
ret.append('')
return ret
def attachToPlotItem(self, plotItem):
"""Add this axis to the given PlotItem
:param plotItem: (PlotItem)
"""
self.setParentItem(plotItem)
viewBox = plotItem.getViewBox()
self.linkToView(viewBox)
self._oldAxis = plotItem.axes[self.orientation]['item']
self._oldAxis.hide()
plotItem.axes[self.orientation]['item'] = self
pos = plotItem.axes[self.orientation]['pos']
plotItem.layout.addItem(self, *pos)
self.setZValue(-1000)
#------------------------------------------------------------------------------
#------------------------------------------------------------------------------
def graph_temperatura():
now = time.time()
timestamps = numpy.linspace(now - 14400, now, 241)
H=pg.plot(x=timestamps, y=OUT_Buffer_Temperatura,pen=pg.mkPen(
color='#ff0000', width=3))
axis = DateAxisItem(orientation='bottom')
axis.attachToPlotItem(H.getPlotItem())
H.plot(x=timestamps, y=OUT_Buffer_Temp_SetPoint,pen=pg.mkPen(
color='#00ff70', width=3))
H.setTitle('Temperatura (Rd), Setpoint (Ze)')
H.showGrid(True, True)
H.setLabel('left', 'Temperatura', units='deg C', **{'font-size': '20pt'})
H.setLabel('bottom', 'Cas', units='h', **{'font-size': '20pt'})
#------------------------------------------------------------------------------
#------------------------------------------------------------------------------
def graph_regulator():
now = time.time()
timestamps = numpy.linspace(now - 14400, now, 241)
H=pg.plot(x=timestamps, y=OUT_Buffer_Regulator,pen=pg.mkPen(
color='#0000ff', width=3))
axis = DateAxisItem(orientation='bottom')
axis.attachToPlotItem(H.getPlotItem())
H.plot(x=timestamps, y=OUT_Buffer_Output,pen=pg.mkPen(
color='y', width=3))
H.setTitle('Regulator (Mo), Output (Ru)')
H.showGrid(True, True)
H.setLabel('left', 'Output', units='%', **{'font-size': '20pt'})
H.setLabel('bottom', 'Cas', units='h', **{'font-size': '20pt'})
#------------------------------------------------------------------------------
#-------------------------------------------------------------------------------
def graph_all():
now = time.time()
timestamps = numpy.linspace(now - 14400, now, 241)
H=pg.plot(x=timestamps, y=OUT_Buffer_Temperatura,pen=pg.mkPen(
color='#ff0000', width=3))
axis = DateAxisItem(orientation='bottom')
axis.attachToPlotItem(H.getPlotItem())
H.plot(x=timestamps, y=OUT_Buffer_Temp_SetPoint,pen=pg.mkPen(
color='#00ff70', width=3))
H.plot(x=timestamps, y=OUT_Buffer_Regulator,pen=pg.mkPen(
color='#0000ff', width=3))
H.plot(x=timestamps, y=OUT_Buffer_Output,pen=pg.mkPen(
color='y', width=3))
H.setTitle('Regulator (Mo), Output (Ru)')
H.showGrid(True, True)
H.setLabel('left', 'Temperatura, Output', units='deg.C, %', **{'font-size':
'20pt'})
H.setLabel('bottom', 'Cas', units='h', **{'font-size': '20pt'})
#------------------------------------------------------------------------------
