Hi,

I have two questions about using NavigationToolbar2Wx with mplot3d.

 

1/  Initially the 3D scatter plot will rotate as usual with a mouse, but after selecting the ‘pan’ or ‘zoom’ buttons the plot responds with some confusion.  How can I restore it to rotation only, i.e. disconnect the zoom or pan behaviour?

 

2/  When using the ‘save’ button I get different behaviours depending on the backend.  With ‘WXAgg’ the saved png image shows only the axes, not the scatter points.  The scatter points and axes do appear correctly in a pdf file.  Using the ‘WX’ backend gives both scatter points and axes for the png file.

 

My full application has a mix of 2D and 3D plots (separate notebooks) and it would be preferable for users if all plots could usedthe common toolbar.

 

I see this behaviour running matplotlib 1.0.1 with Python 2.6.6 and wxPython 2.8.11.0 under Windows XP with the example below.

 

 

#-----------------------------------------------------------------------------------

# adapted from example code "embedding_in_wx2.py"

 

import numpy as np

 

import matplotlib

 

# uncomment the following to use wx rather than wxagg

#matplotlib.use('WX')

#from matplotlib.backends.backend_wx import FigureCanvasWx as FigureCanvas

 

# comment out the following to use wx rather than wxagg

matplotlib.use('WXAgg')

from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas

 

from matplotlib.backends.backend_wx import NavigationToolbar2Wx

 

from matplotlib.figure import Figure

from mpl_toolkits.mplot3d import Axes3D

import wx

 

class CanvasFrame(wx.Frame):

 

    def __init__(self):

        wx.Frame.__init__(self,None,-1,

                         'CanvasFrame',size=(550,350))

 

        self.SetBackgroundColour(wx.NamedColor("WHITE"))

 

        self.figure = Figure()

        self.canvas = FigureCanvas(self, -1, self.figure)

        self.axes = Axes3D(self.figure)       

        xs = np.random.rand(100)

        ys = np.random.rand(100)

        zs = np.random.rand(100)

        self.axes.scatter(xs, ys, zs)

        self.sizer = wx.BoxSizer(wx.VERTICAL)

        self.sizer.Add(self.canvas, 1, wx.LEFT | wx.TOP | wx.GROW)

        self.SetSizer(self.sizer)

        self.Fit()

 

        self.add_toolbar()  # comment this out for no toolbar

 

 

    def add_toolbar(self):

        self.toolbar = NavigationToolbar2Wx(self.canvas)

        self.toolbar.Realize()

        if wx.Platform == '__WXMAC__':

            # Mac platform (OSX 10.3, MacPython) does not seem to cope with

            # having a toolbar in a sizer. This work-around gets the buttons

            # back, but at the expense of having the toolbar at the top

            self.SetToolBar(self.toolbar)

        else:

            # On Windows platform, default window size is incorrect, so set

            # toolbar width to figure width.

            tw, th = self.toolbar.GetSizeTuple()

            fw, fh = self.canvas.GetSizeTuple()

            # By adding toolbar in sizer, we are able to put it at the bottom

            # of the frame - so appearance is closer to GTK version.

            # As noted above, doesn't work for Mac.

            self.toolbar.SetSize(wx.Size(fw, th))

            self.sizer.Add(self.toolbar, 0, wx.LEFT | wx.EXPAND)

        # update the axes menu on the toolbar

        self.toolbar.update()

 

 

    def OnPaint(self, event):

        self.canvas.draw()

 

class App(wx.App):

 

    def OnInit(self):

        'Create the main window and insert the custom frame'

        frame = CanvasFrame()

        frame.Show(True)

        return True

 

app = App(0)

app.MainLoop()

 

#------------------------------------------------------------------------------------------------

 

Regards,

Keith



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