"""
Miscellaneous custom wxPython windowing objects.
"""

from __future__ import absolute_import, division, print_function
import wx

class ChoiceBook(wx.Panel):
  """
  Notebook-like container with a wx.Choice control instead of tabs.
  """
  def __init__(self, *args, **kwds):
    super(ChoiceBook, self).__init__(*args, **kwds)
    szr = wx.BoxSizer(wx.VERTICAL)
    self.SetSizer(szr)
    self._pages = []
    self._current_page = None
    self._was_shown = False
    self._chooser = wx.Choice(parent=self, size=(400,-1))
    szr.Add(self._chooser, 0, wx.ALL|wx.ALIGN_CENTER, 5)
    self._page_sizer = szr #wx.BoxSizer(wx.VERTICAL)
    #szr.Add(self._page_sizer, 1, wx.EXPAND|wx.ALL)
    self.Bind(wx.EVT_CHOICE, self.OnChoose, self._chooser)

  def AddPage(self, page, label):
    """
    Add a panel to the notebook (and the label to the wx.Choice).
    """
    self._pages.append(page)
    self.GetSizer().Add(page, 1, wx.ALL|wx.EXPAND, 0)
    page.Hide()
    items = list(self._chooser.GetItems())
    items.append(label)
    self._chooser.SetItems(items)

  def InsertPage(self, index, page, label):
    """
    Insert a panel in the notebook (and the label to the wx.Choice) at the
    specified index.
    """
    self._pages.insert(0, page)
    self.GetSizer().Add(page, 1, wx.ALL|wx.EXPAND, 0)
    page.Hide()
    items = list(self._chooser.GetItems())
    items.insert(0, label)
    self._chooser.SetItems(items)

  def GetPage(self, i_page):
    return self._pages[i_page]

  def SetPage(self, i_page):
    if (self._current_page is not None):
      self._current_page.Hide()
    self._current_page = self.GetPage(i_page)
    self._current_page.Layout()
    if hasattr(self._current_page, "SetupScrolling") : # scrolledpanel hack
      self._current_page.SetupScrolling(scrollToTop=False)
    self._current_page.Show()
    self._chooser.SetSelection(i_page)
    self.Layout()

  def SetSelection(self, i_page):
    self.SetPage(i_page)

  def GetPageIndex(self, page):
    for i_page, other in enumerate(self._pages):
      if (other is page):
        return i_page
    return -1

  def GetPageCount(self):
    return len(self._pages)

  def OnChoose(self, evt):
    i_page = self._chooser.GetSelection()
    self.SetPage(i_page)

if (__name__ == "__main__"):
  import wx.lib.scrolledpanel
  app = wx.App(0)
  frame = wx.Frame(None, title="Test frame", size=(800,600))
  nb = ChoiceBook(frame)
  page = wx.lib.scrolledpanel.ScrolledPanel(nb, style=wx.SUNKEN_BORDER)
  szr = wx.BoxSizer(wx.VERTICAL)
  page.SetSizer(szr)
  txt  = wx.StaticText(page, -1, "This is some text")
  szr.Add(txt, 0, wx.ALL|wx.ALIGN_CENTER_VERTICAL, 200)
  nb.AddPage(page, "Page 1")
  nb.SetPage(0)
  frame.Show()
  app.MainLoop()