问题描述
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以下代码段在wxPython 2.8.x，Python 2.5.4 / 2.6，Matplotlib 0.99.x上运行时按预期在框架顶部生成matplotlib NavToolbar2。
但是，我最近转向了Python 2.7和wxPython 2.9.1，以尝试支持64位OSX。在这种环境下，下面的代码将产生一个空的工具栏：
我在构建matplotlib时注意到它说了一些关于在wx 2.9及更高版本中不需要WxAgg的信息，这可能是问题所在吗？到目前为止，我一直尝试将is0ѭ替换为
figureCanvasWx
NavigationToolbar2WxAgg
NavigationToolbar2Wx
import wx
from matplotlib.backends.backend_wxagg import figureCanvasWxAgg,NavigationToolbar2WxAgg
import matplotlib as mpl
app = wx.PySimpleApp()
f = wx.Frame(None)
fig = mpl.figure.figure()
p = figureCanvasWxAgg(f,-1,fig)
tb = NavigationToolbar2WxAgg(fig.canvas)
f.SetToolBar(tb)
tb.Realize()
f.Show()
app.MainLoop()
tb.Realize()
2011-05-25 08:21:18.354 Python[48013:60f] *** Assertion failure in -[NSToolbar _itemAtIndex:],/SourceCache/AppKit/AppKit-1038.35/Toolbar.subproj/NSToolbar.m:1227
2011-05-25 08:21:18.356 Python[48013:60f] An uncaught exception was raised
2011-05-25 08:21:18.356 Python[48013:60f] Invalid parameter not satisfying: index>=0 && index<[self _numberOfItems]
2011-05-25 08:21:18.358 Python[48013:60f] *** Terminating app due to uncaught exception \'NSInternalInconsistencyException\',reason: \'Invalid parameter not satisfying: index>=0 && index<[self _numberOfItems]\'
*** Call stack at first throw:
(
0 CoreFoundation 0x00007fff868ef7b4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x00007fff83e9b0f3 objc_exception_throw + 45
2 CoreFoundation 0x00007fff868ef5d7 +[NSException raise:format:arguments:] + 103
3 Foundation 0x00007fff86d7c77e -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 198
4 AppKit 0x00007fff806f44a9 -[NSToolbar _itemAtIndex:] + 158
5 AppKit 0x00007fff806f3e94 -[NSToolbar _removeItemAtIndex:notifyDelegate:notifyView:notifyFamilyAndUpdateDefaults:] + 56
6 libwx_osx_cocoau-2.9.1.0.0.dylib 0x0000000101aea2a6 _ZN9wxToolBar7RealizeEv + 1430
7 _controls_.so 0x00000001048d4b76 _wrap_ToolBarBase_Realize + 102
8 .Python 0x00000001000ca81a PyEval_EvalFrameEx + 23498
9 .Python 0x00000001000cc8c5 PyEval_EvalCodeEx + 1733
10 .Python 0x00000001000ca9bf PyEval_EvalFrameEx + 23919
11 .Python 0x00000001000cc8c5 PyEval_EvalCodeEx + 1733
12 .Python 0x00000001000cb0c8 PyEval_EvalFrameEx + 25720
13 .Python 0x00000001000cc8c5 PyEval_EvalCodeEx + 1733
14 .Python 0x00000001000ca9bf PyEval_EvalFrameEx + 23919
15 .Python 0x00000001000cb2a6 PyEval_EvalFrameEx + 26198
16 .Python 0x00000001000cb2a6 PyEval_EvalFrameEx + 26198
17 .Python 0x00000001000cc8c5 PyEval_EvalCodeEx + 1733
18 .Python 0x00000001000ca9bf PyEval_EvalFrameEx + 23919
19 .Python 0x00000001000cb2a6 PyEval_EvalFrameEx + 26198
20 .Python 0x00000001000cc8c5 PyEval_EvalCodeEx + 1733
21 .Python 0x00000001000ccbc6 PyEval_EvalCode + 54
22 .Python 0x00000001000f0c7e PyRun_FileExFlags + 174
23 .Python 0x00000001000f1aa1 PyRun_SimpleFileExFlags + 817
24 .Python 0x00000001001093d9 Py_Main + 2825
25 Python 0x0000000100000f54 0x0 + 4294971220
)
terminate called after throwing an instance of \'NSException\'
解决方法
似乎是一个错误，但我不知道问题出在matplotlib，wxPython还是backend_wx.py中。我要解决的问题是，我查看了工具栏的backend_wx.py源代码，并将其直接放在wxPython工具栏中。所以这对我有用：
import os
import wx
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg,NavigationToolbar2WxAgg
from matplotlib.backends.backend_wx import _load_bitmap
import matplotlib as mpl
app = wx.PySimpleApp()
f = wx.Frame(None)
fig = mpl.figure.Figure()
p = FigureCanvasWxAgg(f,-1,fig)
toolbar = NavigationToolbar2WxAgg(p)
toolbar.Hide()
#toolbar constants
TBFLAGS = (wx.TB_HORIZONTAL|wx.TB_TEXT)
tsize = (24,24)
tb = f.CreateToolBar(TBFLAGS)
_NTB2_HOME = wx.NewId()
_NTB2_BACK = wx.NewId()
_NTB2_FORWARD = wx.NewId()
_NTB2_PAN = wx.NewId()
_NTB2_ZOOM = wx.NewId()
_NTB2_SAVE = wx.NewId()
_NTB2_SUBPLOT = wx.NewId()
tb.AddSimpleTool(_NTB2_HOME,_load_bitmap(\'home.png\'),\'Home\',\'Reset original view\')
tb.AddSimpleTool(_NTB2_BACK,_load_bitmap(\'back.png\'),\'Back\',\'Back navigation view\')
tb.AddSimpleTool(_NTB2_FORWARD,_load_bitmap(\'forward.png\'),\'Forward\',\'Forward navigation view\')
tb.AddCheckTool(_NTB2_PAN,_load_bitmap(\'move.png\'),shortHelp=\'Pan\',longHelp=\'Pan with left,zoom with right\')
tb.AddCheckTool(_NTB2_ZOOM,_load_bitmap(\'zoom_to_rect.png\'),shortHelp=\'Zoom\',longHelp=\'Zoom to rectangle\')
tb.AddSeparator()
tb.AddSimpleTool(_NTB2_SUBPLOT,_load_bitmap(\'subplots.png\'),\'Configure subplots\',\'Configure subplot parameters\')
tb.AddSimpleTool(_NTB2_SAVE,_load_bitmap(\'filesave.png\'),\'Save\',\'Save plot contents to file\')
f.Bind(wx.EVT_TOOL,toolbar.home,id=_NTB2_HOME)
f.Bind(wx.EVT_TOOL,toolbar.forward,id=_NTB2_FORWARD)
f.Bind(wx.EVT_TOOL,toolbar.back,id=_NTB2_BACK)
f.Bind(wx.EVT_TOOL,toolbar.zoom,id=_NTB2_ZOOM)
f.Bind(wx.EVT_TOOL,toolbar.pan,id=_NTB2_PAN)
f.Bind(wx.EVT_TOOL,toolbar.configure_subplot,id=_NTB2_SUBPLOT)
f.Bind(wx.EVT_TOOL,toolbar.save,id=_NTB2_SAVE)
tb.Realize()
tb.Realize()
f.Show()
app.MainLoop()