How to use relative positioning in my program?

[Larz60+]

Here's an example (extracted from phoenix demo) that shows the various horizontal and vertical sizers,
and the results of using proportions to determine how to resize each widget.
Note that some remain static, and others expand with window expansion.

You should be able to use this as an example to apply to your application (which looks quite nice I might add).

import wx
import wx.lib.sized_controls as sc

class FormDialog(sc.SizedDialog):
    def __init__(self, parent, id=wx.ID_ANY):
        sc.SizedDialog.__init__(self, None, -1, "SizedForm Dialog",
                        style=wx.DEFAULT_DIALOG_STYLE | wx.RESIZE_BORDER)

        pane = self.GetContentsPane()
        pane.SetSizerType("form")

        # row 1
        wx.StaticText(pane, -1, "Name")
        textCtrl = wx.TextCtrl(pane, -1, "Your name here")
        textCtrl.SetSizerProps(expand=True)

        # row 2
        wx.StaticText(pane, -1, "Email")
        emailCtrl = wx.TextCtrl(pane, -1, "")
        emailCtrl.SetSizerProps(expand=True)

        # row 3
        wx.StaticText(pane, -1, "Gender")
        wx.Choice(pane, -1, choices=["male", "female"])

        # row 4
        wx.StaticText(pane, -1, "State")
        wx.TextCtrl(pane, -1, size=(60, -1)) # two chars for state

        # row 5
        wx.StaticText(pane, -1, "Title")

        # here's how to add a 'nested sizer' using sized_controls
        radioPane = sc.SizedPanel(pane, -1)
        radioPane.SetSizerType("horizontal")
        radioPane.SetSizerProps(expand=True)

        # make these children of the radioPane to have them use
        # the horizontal layout
        wx.RadioButton(radioPane, -1, "Mr.")
        wx.RadioButton(radioPane, -1, "Mrs.")
        wx.RadioButton(radioPane, -1, "Dr.")
        # end row 5

        # add dialog buttons
        self.SetButtonSizer(self.CreateStdDialogButtonSizer(wx.OK | wx.CANCEL))

        # a little trick to make sure that you can't resize the dialog to
        # less screen space than the controls need
        self.Fit()
        self.SetMinSize(self.GetSize())

if __name__ == "__main__":
    app = wx.App(False)
    fd = FormDialog(app)
    fd.Show()
    app.MainLoop()