gistfile1.py

class JawaEditorPanel(wx.Panel):
    """
    Constructs the right panel which contains the viewer window.
    """
    def __init__(self, *args, **kwargs):
        super(JawaEditorPanel, self).__init__(*args, **kwargs)
        self._notebook = notebook = wx.aui.AuiNotebook(
            self,
            wx.ID_ANY, style=(
                wx.EXPAND |
                wx.aui.AUI_NB_CLOSE_ON_ACTIVE_TAB |
                wx.aui.AUI_NB_WINDOWLIST_BUTTON
            )
        )

        self.box = box = wx.BoxSizer(wx.HORIZONTAL)
        box.Add(notebook, proportion=1, flag=wx.EXPAND)
        self.SetSizer(box)

        self.Bind(
            wx.aui.EVT_AUINOTEBOOK_PAGE_CLOSE,
            self._notebook_closing,
            notebook)

        self.Bind(
            wx.aui.EVT_AUINOTEBOOK_PAGE_CLOSED,
            self._notebook_closed,
            notebook)

    @property
    def notebook(self):
        return self._notebook

    def _notebook_closing(self, event):
        # Temporary workaround due to Freeze being broken in 2.9.3+
        self.notebook.Freeze()
        # Select the previous page BEFORE closing this page.
        if event.Selection > 0:
            self.notebook.SetSelection(event.Selection - 1)

    def _notebook_closed(self, event):
        # Pages have been closed & switched.
        self.notebook.Thaw()