Mastering GUI Programming with Python

Building a CPU usage chart

Let's start our CPU monitor in a new class called CPUUsageView:

class CPUUsageView(qtch.QChartView):    num_data_points = 500    chart_title = "CPU Utilization"    def __init__(self):        super().__init__()        chart = qtch.QChart(title=self.chart_title)        self.setChart(chart)

Just as we did with our disk usage chart, we're basing this class on QChartView and beginning the constructor by creating a QChart object. We've also defined a title, and, just as we did in Chapter 12, Creating 2D Graphics with QPainter, configured a number of data points to display at one time. We're going to do a lot more points this time, though, so that we can get a more detailed chart.

After creating the chart object, the next step is to create the series ...