我创建了一个类，允许用户将多个图表添加到 MATPLOTLIB 窗口。这些可以是折线图或条形图。它还有一个功能，当图表已经添加到窗口（从 rowID 标识）而不是绘制新图时，它将替换旧图中的数据。即它允许更新（动画）
这对于折线图很有效，但是在绘制多个条形图时会损坏。该类看起来像：
import math
class TFrmPlot():
def __init__(self, point_lists, deleteCallback, plotType, rowID):
import matplotlib
matplotlib.interactive( True )
matplotlib.use( 'WXAgg' )
import matplotlib.pyplot as plt
self.plt = plt
self.fig = plt.figure()
self.fig.canvas.mpl_connect('close_event', self.on_close)
import matplotlib.axes as ax
self.ax = ax
self.deleteCallback = deleteCallback
self.chartArray = []
self.addChart(point_lists, plotType, rowID)
def close(self):
self.plt.close('all')
#self.fig.close()
def replaceChartDataIfChartExists(self, point_lists, rowID):
if rowID==0:
pass
for chart in self.chartArray:
for plot in chart.plots:
if plot.rowID == rowID:
plot.points = point_lists
if plot.plotType=="Point":
plot.plotItem.set_data(point_lists[0],point_lists[1])
chart.subPlot.draw_artist(plot.plotItem)
self.fig.canvas.blit(chart.subPlot.bbox)
else:
for rect, h in zip(plot.plotItem, point_lists[1]):
rect.set_height(h)
chart.subPlot.relim()
chart.subPlot.autoscale_view(True,True,True)
self.plt.draw()
return True
return False
def addChart(self, point_lists, plotType, rowID):
self.chartArray.append(TChart(rowID,plotType,point_lists))
self._drawAll()
def addPlot(self, point_lists, plotType, rowID):
chartNum = len(self.chartArray)
self.chartArray[chartNum-1].plots.append(TPlot(rowID,plotType,point_lists))
self._drawAll()
def on_close(self, event):
self.deleteCallback()
def _drawAll(self):
self.plt.clf()
numSubPlots = len(self.chartArray)
numCols = self._noCols(numSubPlots)
IndexConverter = TIndexConverter(numCols)
subPlot = None
for chartIndex in range(0,numSubPlots):
if numSubPlots==1:
subPlot = self.fig.add_subplot(1,1,1)
elif numSubPlots==2:
subPlot = self.fig.add_subplot(1,2,chartIndex+1)
else:
subPlot = self.fig.add_subplot(2,numCols,IndexConverter._getSubPlotIndex(chartIndex))
subPlot.relim()
subPlot.autoscale_view(True,True,True)
self.chartArray[chartIndex].subPlot = subPlot
self._drawSubs(self.chartArray[chartIndex])
self.plt.show()
def _drawSubs(self, chart):
for plot in chart.plots:
if plot.plotType=="Point":
chart.subPlot.plot(plot.points[0],plot.points[1])
plot.plotItem = chart.subPlot.lines[len(chart.subPlot.lines)-1]
else:
kwargs = {"alpha":0.5}
plot.plotItem = chart.subPlot.bar(plot.points[0],plot.points[1], width=self._calculateleastDiff(plot.points[0]), **kwargs)
def _noCols(self, numSubPlots):
return math.ceil(float(numSubPlots)/2.0)
def _calculateleastDiff(self, xValues):
xValues2 = sorted(xValues)
leastDiff = None
lastValue = None
for value in xValues2:
if lastValue is not None:
diff = value-lastValue
if leastDiff is None or diff < leastDiff:
leastDiff = diff
lastValue = value
return leastDiff
这有点长，总结一下：
addChart - 基本上添加了一个新的子图
addPlot -- 向现有子图添加新线或条
replaceChartDataIfChartExists -- 如果 ID 已经存在则刷新数据
我使用的虚拟数据只是连续绘制正梯度和负梯度线。但是，我的图可能会进入一个/部分或全部条形图损坏的状态。看起来 x/y 轴几乎已经旋转，各个条形不是从 x 轴开始的。问题是间歇性的；有时我会按预期得到几个情节。一旦情节被破坏，所有未来的更新都会被破坏。
根据要求，剩余代码：
class TIndexConverter():
def __init__(self, numCols):
self.evenCounter = 0
self.oddCounter = numCols
def _getSubPlotIndex(self, arrayIndex):
if arrayIndex%2==0:
self.evenCounter += 1
return self.evenCounter
else:
self.oddCounter += 1
return self.oddCounter
class TChart():
def __init__(self, rowID, plotType, point_lists):
self.subPlot = None
self.plots = [TPlot(rowID, plotType, point_lists)]
class TPlot():
def __init__(self, rowID, plotType, point_lists):
self.plotItem = None
self.plotType = plotType
self.rowID = rowID
self.points = point_lists
一些客户端代码：
def _updateData(self, state, data):
if self.plot is not None:
if not self.plot.replaceChartDataIfChartExists(data, state.comm.rowID):
if self.createNewChart == True:
self.plot.addChart(data, state.setting.plotType, state.comm.rowID)
else:
self.plot.addPlot(data, state.setting.plotType, state.comm.rowID)