ウィンドウにドラッグアンドドロップでファイルパスを取得できる

ComicInfoGetter.py

import wx
import os


class ComicInfoGetter(wx.App):

    def OnInit(self):
        frm = GuiWindow("ComicInfo Getter from D&M Lexicon")
        frm.Show()
        return 1


class GuiWindow(wx.Frame):

    def __init__(self, title):

        wx.Frame.__init__(self, None, -1, title, size=(480, 600), pos=(400, 448))
        panel = wx.Panel(self, wx.ID_ANY)

        self.url_input = wx.TextCtrl(panel, wx.ID_ANY, 'Info URL')
        self.filepath = wx.TextCtrl(panel, wx.ID_ANY, 'Archive Path')
        self.openfilebutton = wx.Button(panel, wx.ID_ANY, '...')

        self.openfilebutton.Bind(wx.EVT_BUTTON, self.open)

        dt = Droptarget(self)
        self.SetDropTarget(dt)

        line1 = wx.BoxSizer(wx.HORIZONTAL)
        line2 = wx.BoxSizer(wx.HORIZONTAL)
        layout = wx.BoxSizer(wx.VERTICAL)

        line1.Add(self.filepath, proportion=1, flag=wx.GROW)
        line1.Add(self.openfilebutton, proportion=0, flag=wx.GROW)
        line2.Add(self.url_input, proportion=1, flag=wx.GROW)

        layout.Add(line1, proportion=0, flag=wx.ALIGN_RIGHT | wx.EXPAND | wx.ALL, border=5)
        layout.Add(line2, proportion=0, flag=wx.ALIGN_RIGHT | wx.EXPAND | wx.ALL, border=5)

        panel.SetSizer(layout)

    def open(self, e):
        path = ''
        dialog = wx.FileDialog(self, "Choose a File", path, "*.*")
        if dialog.ShowModal() == wx.ID_OK:
            path = os.path.join(dialog.GetDirectory(), dialog.GetFilename())
            self.filepath.SetValue(path)
        dialog.Destroy()


class Droptarget(wx.FileDropTarget):

    def __init__(self, window):
        wx.FileDropTarget.__init__(self)
        self.window = window

    def OnDropFiles(self, x, y, files):
        if len(files) == 1:
            self.window.filepath.SetValue(files[0])
        else:
            wx.MessageBox("I can't do with multiple files!", 'Error')

if __name__ == '__main__':
    app = ComicInfoGetter()
    app.MainLoop()