Question

I have my main program window, and I would like to make a foldable panel. What I mean is, a panel which is aligned to one of the sides of the window, with a fold/unfold button. It’s important that when the panel gets folded/unfolded, the other widgets change their size accordingly to take advantage of the space they have.

How do I do this?

Answer 1

Here is one way using wx.SplitterWindow

import wx, wx.calendar


class FoldableWindowContainer(wx.Panel):
    def __init__(self, parent, left, right):
        wx.Panel.__init__(self, parent)

        sizer = wx.BoxSizer(wx.HORIZONTAL)
        self.SetSizer(sizer)
        self.splitter = wx.SplitterWindow(self, style=wx.SP_LIVE_UPDATE)
        left.Reparent(self.splitter)
        right.Reparent(self.splitter)
        self.left = left
        self.right = right
        self.splitter.SplitVertically(self.left, self.right)
        self.splitter.SetMinimumPaneSize(50)
        self.sash_pos = self.splitter.SashPosition
        sizer.Add(self.splitter, 1, wx.EXPAND)

        fold_button = wx.Button(self, size=(10, -1))
        fold_button.Bind(wx.EVT_BUTTON, self.On_FoldToggle)
        sizer.Add(fold_button, 0, wx.EXPAND)

    def On_FoldToggle(self, event):
        if self.splitter.IsSplit():
            self.sash_pos = self.splitter.SashPosition
            self.splitter.Unsplit()
        else:
            self.splitter.SplitVertically(self.left, self.right, self.sash_pos)


class FoldTest(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None)

        left = wx.Panel(self, style=wx.BORDER_SUNKEN)
        right = wx.Panel(self, style=wx.BORDER_SUNKEN)

        left_sizer = wx.BoxSizer(wx.VERTICAL)
        left.SetSizer(left_sizer)
        left_sizer.Add(wx.calendar.CalendarCtrl(left), 1, wx.EXPAND | wx.ALL, 5)
        left_sizer.Add(wx.Button(left, label="Act"), 0, wx.EXPAND | wx.ALL, 5)

        right_sizer = wx.BoxSizer(wx.VERTICAL)
        right.SetSizer(right_sizer)
        right_sizer.Add(
            wx.StaticText(right, label="Fold panel", style=wx.BORDER_RAISED),
            1, wx.EXPAND | wx.ALL, 5
        )

        FoldableWindowContainer(self, left, right)


app = wx.PySimpleApp()
app.TopWindow = FoldTest()
app.TopWindow.Show()
app.MainLoop()

Also, check out wx.CollapsiblePane in the wxPython demos.