python – Matplotlib拖放文件

概述我希望能够在我的Matplotlib图上拖放一个文件,并对所述文件做一些事情(比如打开并绘制它！).不幸的是,我的脚本使用以下方法处理一些事件：     fig.canvas.mpl_connect(‘button_release_event’,self.btn_release) 等等,我找不到任何会返回放在它上面的文件路径的东西. 我还没有达到我想用嵌入式图创建GUI的水平,所以如果有一个没有这 我希望能够在我的Matplotlib图上拖放一个文件,并对所述文件做一些事情(比如打开并绘制它！).不幸的是,我的脚本使用以下方法处理一些事件：
    fig.canvas.mpl_connect(‘button_release_event’,self.btn_release)
等等,我找不到任何会返回放在它上面的文件路径的东西.

我还没有达到我想用嵌入式图创建GUI的水平,所以如果有一个没有这样做的解决方案,我宁愿这样做.

解决方法 你似乎希望drop_file_event由mpl_connect处理;不幸的是,根据 documentation的情况并非如此(无论如何,这是一个通用绘图库的具体情况).

但是,实现自己的GUI处理drop事件并不困难.下面是一个主要基于@L_502_1@并添加wx.fileDropTarget的示例.

# Used to guarantee to use at least Wx2.8import wxversionwxversion.ensureMinimal('2.8')import numpy as npimport wximport matplotlibmatplotlib.use('WXAgg')from matplotlib.backends.backend_wxagg import figureCanvasWxAgg as figureCanvasfrom matplotlib.backends.backend_wx import NavigationToolbar2Wxfrom matplotlib.figure import figureclass MyfileDropTarget(wx.fileDropTarget):    def __init__(self,window):        wx.fileDropTarget.__init__(self)        self.window = window    def OnDropfiles(self,x,y,filenames):        fig = self.window.figure        inaxes = fig.get_axes()[0]        h_pix = int(fig.get_figheight() * fig.get_dpi()) # fig height in pixels        message = "%d file(s) dropped at (%d,%d):\n" % (len(filenames),y)        for file in filenames:            message += file + "\n"        inaxes.annotate(message,(x,h_pix-y),xycoords='figure pixels')                self.window.draw()class CanvasPanel(wx.Panel):    def __init__(self,parent):        wx.Panel.__init__(self,parent)        self.figure = figure()        self.axes = self.figure.add_subplot(111)        self.canvas = figureCanvas(self,-1,self.figure)        self.sizer = wx.BoxSizer(wx.VERTICAL)        self.sizer.Add(self.canvas,1,wx.left | wx.top | wx.GROW)        self.SetSizer(self.sizer)        self.add_toolbar()        self.Fit()        win_target = self.canvas        dt = MyfileDropTarget(win_target)        win_target.SetDropTarget(dt)    def draw(self):        t = np.linspace(0.0,2.,100)        s = np.sin(2 * np.pi * t)        self.axes.plot(t,s)    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,wx.left | wx.EXPAND)        # update the axes menu on the toolbar        self.toolbar.update()if __name__ == "__main__":    app = wx.PySimpleApp()    frame = wx.Frame(None,Title='file drop test')    panel = CanvasPanel(frame)    panel.draw()    frame.Show()    app.MainLoop()

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