In pyqt, plotting different matplotlib plots after row clicks?

Question

Python

I want to build different graphics after clicks on acc. rows in QListWidget. The signal is transmitted via connect, but the graph is not built (nothing happens), and if you place a call to the graph function (self.hist()) in __init__ , then the graph is built, but if you try to build it through the signal, then no :/
part of the code, related to this problem

class Myplot(FigureCanvas):
    def __init__(self, parent=None):
        self.fig = Figure()
        FigureCanvas.__init__(self, self.fig)
#        self.hist()    
    def compute_initial_figure(self):
        self.axes = self.fig.add_subplot(1,1,1)
        self.axes.hold(False)
        self.axes.plot(np.random.rand(400))
    def hist(self):
        tm = pd.Series(np.random.randn(500), index=pd.date_range('1/1/2005', periods=500))
        self.axes = self.fig.add_subplot(1,1,1)
        self.axes.hold(False)
        tm = tm.cumsum()
        self.axes.plot(tm)
        
class Panel (QtGui.QListWidget):
    def __init__(self, parent=None):
        QtGui.QListWidget.__init__(self)
        self.row1 = "COMMISSIONS & FEES"
        self.addItem(self.row1)
        row2 = "NET LIQUIDATING VALUE"
        self.addItem(row2)
        self.setFixedWidth(200)
        self.itemClicked.connect(self.Clicked)
    def Clicked(self):
        mplot=Myplot()
        index=self.currentRow()
        if index == 0:
            print '0000'
            mplot.compute_initial_figure()
        if index == 1:
            mplot.hist()

All code pastebin.com/H54QsmQW
Also welcome any criticism/advice

Answer 1

I didn’t find anything else, except how to combine both classes into one, that’s the only way it worked

class Myplot(QtGui.QWidget):
    def __init__(self, parent=None):
        super(Myplot, self).__init__(parent)
        # a figure instance to plot on
        self.figure = plt.figure()
        # this is the Canvas Widget that displays the `figure`
        # it takes the `figure` instance as a parameter to __init__
        self.canvas = FigureCanvas(self.figure)
        self.mylist=QListWidget(self)
        row1="COMMISSIONS & FEES"
        self.mylist.addItem(row1)
        row2="NET LIQUIDATING VALUE"
        self.mylist.addItem(row2)
        self.mylist.setFixedWidth(200)
        self.mylist.itemClicked.connect(self.Clicked)

        # set the layout
        minlayout = QtGui.QHBoxLayout()
        minlayout.addWidget(self.mylist)
        minlayout.addWidget(self.canvas)
        self.setLayout(minlayout)
#        self.hist()    
    def compute_initial_figure(self):
        # random data
        xdata = [random.random() for i in range(10)]
        # create an axis
        ax = self.figure.add_subplot(111)
        # discards the old graph
        ax.hold(False)
        # plot data
        ax.plot(xdata)
        # refresh canvas
        self.canvas.draw()
    def hist(self):
        tm = pd.Series(np.random.randn(500), index=pd.date_range('1/1/2005', periods=500))
        tm = tm.cumsum()
        ax = self.figure.add_subplot(111)
        ax.hold(False)
        ax.plot(tm)
        self.canvas.draw()
    
    def Clicked(self):
        index=self.mylist.currentRow()
        if index == 0:
            print '0000'
            self.compute_initial_figure()
        if index == 1:
            print '1111'
            self.hist()