def make():
demo = QwtPlot()
demo.setCanvasBackground(Qt.white)
demo.setTitle("Histogram")
grid = QwtPlotGrid()
grid.enableXMin(True)
grid.enableYMin(True)
grid.setMajorPen(QPen(Qt.black, 0, Qt.DotLine))
grid.setMinorPen(QPen(Qt.gray, 0, Qt.DotLine))
grid.attach(demo)
histogram = HistogramItem()
histogram.setColor(Qt.darkCyan)
numValues = 20
samples = []
pos = 0.0
for i in range(numValues):
width = 5 + random.randint(0, 4)
value = random.randint(0, 99)
samples.append(QwtIntervalSample(value, QwtInterval(pos, pos + width)))
pos += width
histogram.setData(QwtIntervalSeriesData(samples))
histogram.attach(demo)
demo.setAxisScale(QwtPlot.yLeft, 0.0, 100.0)
demo.setAxisScale(QwtPlot.xBottom, 0.0, pos)
demo.replot()
demo.resize(600, 400)
demo.show()
return demo
def __init__(self, *args):
QwtPlot.__init__(self, *args)
self.curves = {}
self.data = {}
self.timeData = 1.0 * np.arange(0, HISTORY, 1)
self.MemStat = MemStat()
self.setAutoReplot(False)
self.plotLayout().setAlignCanvasToScales(True)
self.setAxisScale(QwtPlot.xBottom, HISTORY, 0)
self.setAxisScale(QwtPlot.yLeft, 0, 100)
self.setAxisLabelAlignment(QwtPlot.xBottom,
Qt.AlignLeft | Qt.AlignBottom)
grid = QwtPlotGrid()
grid.enableXMin(True)
grid.enableYMin(True)
grid.setMajPen(QPen(Qt.black, 0, Qt.DotLine))
grid.setMinPen(QPen(Qt.gray, 0, Qt.DotLine))
grid.attach(self)
stat = MemStat.statistic()
self.data["MemTotal"] = np.zeros(HISTORY, float)
self.data["MemFree"] = np.zeros(HISTORY, float)
self.data["SwapTotal"] = np.zeros(HISTORY, float)
self.data["SwapFree"] = np.zeros(HISTORY, float)
curve = MemoryCurve("Memory")
curve.setColor(self.colors[0])
curve.attach(self)
self.curves["Memory"] = curve
self.data["Memory"] = np.zeros(HISTORY, float)
curve = MemoryCurve("Swap")
curve.setColor(self.colors[1])
curve.attach(self)
self.curves["Swap"] = curve
self.data["Swap"] = np.zeros(HISTORY, float)
self.startTimer(1000)
self.replot()