validators.py

import wx

class NumericTextCtrlValidator(wx.Validator):
    def __init__(self):
        wx.Validator.__init__(self)
        
    def Clone(self):
        return NumericTextCtrlValidator()
        
    def Validate(self, parent):
        text_ctrl = self.GetWindow()
        value = text_ctrl.GetValue()
        if value.isdigit():
            text_ctrl.SetBackgroundColour(wx.SystemSettings.GetColour(wx.SYS_COLOUR_WINDOW))
            text_ctrl.Refresh()
            return True
        else:
            text_ctrl.SetBackgroundColour(wx.Colour(255, 128, 128))
            text_ctrl.Refresh()
            return False
        
    def TransferToWindow(self):
        return True
        
    def TransferFromWindow(self):
        return True

class FloatTextCtrlValidator(wx.Validator):
    def __init__(self):
        wx.Validator.__init__(self)
        
    def Clone(self):
        return FloatTextCtrlValidator()
        
    def Validate(self, parent):
        text_ctrl = self.GetWindow()
        value = text_ctrl.GetValue()
        if value.isdigit():
            text_ctrl.SetBackgroundColour(wx.SystemSettings.GetColour(wx.SYS_COLOUR_WINDOW))
            text_ctrl.Refresh()
            return True
        elif value.replace('.','',1).isdigit() and value.count('.') < 2:
            text_ctrl.SetBackgroundColour(wx.SystemSettings.GetColour(wx.SYS_COLOUR_WINDOW))
            text_ctrl.Refresh()
            return True
        else:
            text_ctrl.SetBackgroundColour(wx.Colour(255, 128, 128))
            text_ctrl.Refresh()
            return False
        
    def TransferToWindow(self):
        return True
        
    def TransferFromWindow(self):
        return True