Update the monitor code

Changes made to the monitor code to remove all warnings from
systemsupport.py.  Note there are warnings in oneUpMon, however these do
not appear to be valid, as some of them complain about attributes not
existing, when they clearly do (Qt.AlignBottom for instance)

monitor/oneUpMon.py

@@ -7,14 +7,13 @@ Requires: PyQt5 (including QtCharts)
 
 """
 
-import os
 import sys
 from systemsupport import systemData, CPULoad
 
 # --------------------------
 # Globals
 # --------------------------
-sysdata = None
+sysdata = systemData()
 cpuload = CPULoad()
 
 # --------------------------
@@ -23,7 +22,7 @@ cpuload = CPULoad()
 
 from PyQt5.QtCore import Qt, QTimer
 from PyQt5.QtGui import QPainter
-from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QGridLayout, QLabel
+from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QGridLayout
 from PyQt5.QtChart import QChart, QChartView, QLineSeries, QValueAxis
 
 class RollingChart(QWidget):
@@ -39,7 +38,7 @@ class RollingChart(QWidget):
     def __init__(self, title: str, series_defs: list[tuple], y_min: float, y_max: float, window: int = 120, parent=None):
         super().__init__(parent)
         
-        self.window = window
+        self.pointWindow = window
         self.xpos   = window - 1
         self.chart  = QChart()
         
@@ -60,7 +59,7 @@ class RollingChart(QWidget):
         # want is the tick count etc, but NO lable on the axis.  There does not
         # appear to be a way to do that.
         self.axis_x = QValueAxis()
-        self.axis_x.setRange(0, self.window)
+        self.axis_x.setRange(0, self.pointWindow)
         self.axis_x.setMinorTickCount( 2 )
         self.axis_x.setTickCount( 10 )
         self.axis_x.setLabelFormat("%d")
@@ -108,7 +107,7 @@ class RollingChart(QWidget):
                 pass
             
         # Trim series to rolling window
-        min_x_to_keep = max(0, self.xpos - self.window)
+        min_x_to_keep = max(0, self.xpos - self.pointWindow)
         self.axis_x.setRange(min_x_to_keep, self.xpos)
         
         for s in self.series:
@@ -213,7 +212,7 @@ class RollingChartDynamic(RollingChart):
                 pass
             
         # Trim series to rolling window
-        min_x_to_keep = max(0, self.xpos - self.window)
+        min_x_to_keep = max(0, self.xpos - self.pointWindow)
         self.axis_x.setRange(min_x_to_keep, self.xpos)
             
         if scaleUp:
@@ -372,6 +371,5 @@ def main():
     sys.exit(app.exec_())
 
 if __name__ == "__main__":
-    sysdata = systemData()
     main()