嵌入在wxPython中的Matplotlib:导航工具栏中的TextCtrl无法在macos上运行

时间:2018-04-30 20:55:13

标签: macos matplotlib wxpython

我在wxPython(Phoenix 4.0.1)和Python 3.6.4中使用Matplotlib API(2.2.2)编写了一个简单的嵌入式图形。我已经将WXAgg导航工具栏子类化,因此我可以删除"配置子图"工具,这工作正常。

此外,我在我的子类工具栏中添加了一个只读的TextCtrl来显示鼠标坐标(就像它出现在基于pyplot状态的matplotlib版本中)。我已根据Matplotlib文档为鼠标移动事件实现了一个简单的处理程序,这在Windows 10上运行良好。

但是,此代码不能完全适用于macOS(10.13.4 High Sierra)。图表显示得很好,工具栏显示正常,工具栏按钮工作正常,但我没有在工具栏中显示我的TextCtrl和鼠标坐标(甚至我创建TextCtrl时设置的初始值)。

有人能说明为什么Matplotlib工具栏中的TextCtrl不能在Mac上运行吗?有没有办法在Mac上这样做?如果这根本不可能,我在Matplotlib画布的其他地方显示鼠标坐标的替代方法是什么?

这是我的示例代码:

import wx
from matplotlib.figure import Figure
from matplotlib import gridspec
import numpy as np
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas
from matplotlib.backends.backend_wx import NavigationToolbar2Wx as NavigationToolbar

class MyToolbar(NavigationToolbar): 
    def __init__(self, plotCanvas):
        # create the default toolbar
        NavigationToolbar.__init__(self, plotCanvas)

        # Add a control to display mouse coordinates
        self.info = wx.TextCtrl(self, -1, value = 'Coordinates', size = (100,-1),
                                style = wx.TE_READONLY | wx.BORDER_NONE)
        self.AddStretchableSpace()
        self.AddControl(self.info)

        # Remove configure subplots
        SubplotsPosition = 6
        self.DeleteToolByPos(SubplotsPosition)
        self.Realize()

class Graph(wx.Frame):
    def __init__(self, parent, title='Coordinates Test'):
        super().__init__(parent, title=title) 

        self.SetSize((900, 500))

        # A simple embedded matplotlib graph
        self.fig = Figure(figsize = (8.2,4.2), facecolor = 'gainsboro')
        self.canvas = FigureCanvas(self, -1, self.fig)
        gs = gridspec.GridSpec(2, 1, left = .12, right = .9, bottom = 0.05, top = .9, height_ratios = [10, 1], hspace = 0.35)
        ax = self.fig.add_subplot(gs[0])

        t = np.arange(0.0, 2.0, 0.01)
        s = 1 + np.sin(2 * np.pi * t)
        ax.plot(t, s)

        ax.set(xlabel='time (s)', ylabel='voltage (mV)',
               title='About as simple as it gets, folks')
        ax.grid()
        ax.set_navigate(True)

        # Get a toolbar instance
        self.toolbar = MyToolbar(self.canvas)
        self.toolbar.Realize()

        # Connect to matplotlib for mouse movement events
        self.canvas.mpl_connect('motion_notify_event', self.onMotion)
        self.toolbar.update()

        # Layout the frame
        self.sizer = wx.BoxSizer(wx.VERTICAL)
        self.sizer.Add(self.canvas, 1, wx.LEFT | wx.EXPAND)
        self.sizer.Add(self.toolbar, 0, wx.LEFT | wx.EXPAND)
        self.SetSizer(self.sizer)

    def onMotion(self, event):
        if event.inaxes:
            xdata = event.xdata
            ydata = event.ydata
            self.toolbar.info.ChangeValue(f'x = {xdata:.1f},  y = {ydata:.1f}')
        else:
            self.toolbar.info.ChangeValue('')


class MyFrame(wx.Frame):
    def __init__(self, parent, title=""):
        super().__init__(parent, title=title) 
        self.SetSize((800, 480))

        self.graph = Graph(self)
        self.graph.Show()

class MyApp(wx.App):
    def OnInit(self):
        self.frame = MyFrame(None, title='Main Frame')
        self.frame.Show()
        return True

if __name__ == "__main__":
    app = MyApp(False)
    app.MainLoop() 

1 个答案:

答案 0 :(得分:0)

我意识到这已经很晚了,但我认为最简单的解决方案是不要将NavigationToolbar子类化,而只是添加自己的TextCtrl。

即完全摆脱MyToolbar并修改代码

    # Get a toolbar instance
    self.toolbar = NavigationToolbar(self.canvas)
    self.info = wx.TextCtrl(self, -1, value = 'Coordinates', size = (100,-1),
                            style = wx.TE_READONLY | wx.BORDER_NONE)

    self.canvas.mpl_connect('motion_notify_event', self.onMotion)
    self.toolbar.update()

    # Layout the frame
    self.sizer = wx.BoxSizer(wx.VERTICAL)
    self.sizer.Add(self.canvas, 1, wx.LEFT | wx.EXPAND)

    bottom_sizer = wx.BoxSizer(wx.HORIZONTAL)
    bottom_sizer.Add(self.toolbar, 0, wx.LEFT | wx.EXPAND)
    bottom_sizer.Add(self.info, 1, wx.LEFT | wx.EXPAND)
    self.sizer.Add(bottom_sizer, 0, wx.LEFT | wx.EXPAND)

    self.SetSizer(self.sizer)

def onMotion(self, event):
    if event.inaxes is not None:
        xdata = event.xdata
        ydata = event.ydata
        self.info.ChangeValue(f'x = {xdata:.1f},  y = {ydata:.1f}')
    else:
        self.info.ChangeValue('')

将给出显示运动事件的TextCtrl。