matplotlib导航工具栏在wx 2.9（Mac OS X）中未显示
下面这段代码在 wxPython 2.8.x、Python 2.5.4/2.6 和 Matplotlib 0.99.x 的环境下运行时，会在窗口的顶部正常显示一个 matplotlib 的工具栏。
不过，我最近升级到了 Python 2.7 和 wxPython 2.9.1，目的是为了支持 64 位的 OS X。在这个新环境下，下面的代码却只显示了一个空的工具栏：
我注意到在构建 matplotlib 时，有提到 wx 2.9 及以上版本不需要 WxAgg，这可能是问题所在吗？到目前为止，我尝试过把 FigureCanvasWxAgg 替换成 FigureCanvasWx，把 NavigationToolbar2WxAgg 替换成 NavigationToolbar2Wx，但都没有成功。
有没有人知道这是怎么回事？
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()
还有一件事……如果我把 NavigationToolbar2WxAgg 替换成我自己定义的工具栏类（代码在这个讨论的第一个回答中：在 matplotlib 中添加新的导航模式），整个程序就会崩溃，除非我去掉 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'
1 个回答
4
这看起来像是个bug，但我不确定问题出在matplotlib、wxPython还是backend_wx.py上。为了修复这个问题，我查看了backend_wx.py的源代码，找到了工具栏的部分，然后直接把它放到了我的wxPython工具栏里。所以这样对我来说是有效的：
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()
这只是个临时解决办法，但我想还是得有人去提交一个bug报告。