# --------------------------------------------------------------------------------- #
# GENERICMESSAGEDIALOG wxPython IMPLEMENTATION
#
# Andrea Gavana, @ 07 October 2008
# Latest Revision: 07 October 2008, 22.00 GMT
#
#
# TODO List
#
# 1) ?
#
#
# For all kind of problems, requests of enhancements and bug reports, please
# write to me at:
#
# andrea.gavana@gmail.com
# gavana@kpo.kz
#
# Or, obviously, to the wxPython mailing list!!!
#
#
# End Of Comments
# --------------------------------------------------------------------------------- #

"""
Description
===========

This class represents a dialog that shows a single or multi-line message,
with a choice of OK, Yes, No and Cancel buttons. It is a possible replacement
for the standard wx.MessageDialog, with these extra functionalities:

* Possibility to modify the dialog position;
* Custom themed generic bitmap & text buttons;
* Possibility to set an icon to the dialog;
* More visibility to the button getting the focus;
* Good old Python code :-D .

And a lot more. Check the demo for an almost complete review of the functionalities.


Supported Platforms
===================

SuperToolTip has been tested on the following platforms:
  * Windows (Windows XP).


Latest Revision: Andrea Gavana @ 07 October 2008, 22.00 GMT
Version 0.1

"""

import wx
import wx.lib.buttons as buttons

from wx.lib.embeddedimage import PyEmbeddedImage

_ = wx.GetTranslation

_cancel = PyEmbeddedImage(
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    "AABJRU5ErkJggg==")

#----------------------------------------------------------------------
_error = PyEmbeddedImage(
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#----------------------------------------------------------------------
_help = PyEmbeddedImage(
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#----------------------------------------------------------------------
_information = PyEmbeddedImage(
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#----------------------------------------------------------------------
_no = PyEmbeddedImage(
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#----------------------------------------------------------------------
_ok = PyEmbeddedImage(
    "iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABHNCSVQICAgIfAhkiAAAAjdJ"
    "REFUOI2tksFLk3Ecxp+97975vmuve1dWuiUTNIy1JlsLpkZG0aXLbv0B0aVDUMfVQTp0jJpF"
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    "a9QXPGL7gxc9L/eE98wwHWaG6JD1783/kB9qTvueLt8LjwAAAABJRU5ErkJggg==")

#----------------------------------------------------------------------
_question = PyEmbeddedImage(
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    "AElFTkSuQmCC")

#----------------------------------------------------------------------
_reassign = PyEmbeddedImage(
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    "BZY2NXD0eBq7qwNrySxjo/eo1Ry01vzGABhKDyjmRsCoh9nvUP2KUZnm7pMJujZv41f8r5A+"
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    "OML8/A9EBBERAMO27YexWIzohnY8dS7GX/TRuilFfEsP1WoFr7cen8+H/vcIUAmFQmKappim"
    "Kc3NfvH7FxcIBASQfD4f5X/4CVPZn52VDH4mAAAAAElFTkSuQmCC")

#----------------------------------------------------------------------
_warning = PyEmbeddedImage(
    "iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAABHNCSVQICAgIfAhkiAAABohJ"
    "REFUWIXVlktsHVcZx3/nzJyZ+7RvYjs3Jtj12773xokfcV4VCgopArUisEhb8ahIg9ImAYnn"
    "glVggRCgbtghVqxYVCwQokh0gSDQNhJSC4iIUpREbWM7iePHffnOnJlzWMy1Y9RWTdxmwZGO"
    "ZjQ65zu/7/t/33cG/l/HTx4pZv/0s/OHfvXdR/ceA3e7duR2Ns2CGhrpuVgeUi/uL2V+f+pT"
    "hSe2C+BsZ9NXZ51jhz4x+8PBoVSh0KHyrfV4gP/M/+61GtX7tXXfEXgMMmNTE+eGxnu7CBpI"
    "GzC+r3/64HTX5+/X1rYAjh5KnxidKX86q1rYYB3COsUeJSZnBp++8BHGHijAWegcnqpc6H9o"
    "Ry5er2MjDVGIiGqMT+4Zm5zp/jIgHhjA4MOFk2NT48dUvEYUaEygsUEAQYOenYK9s4Nf/OYI"
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    "+VLXUCJGiRhPRCjdQC0v4a8u4zSWIA4gauFEa6Q9UC5I0fa1DeHHDQ6Us/39u9Uz7/bn9I4P"
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    "MAbBMlx9HpoL4Kh2LbYBrAGx0S8sHVlLdV323ViMrl2+w6ubAJ/Zz7HJPr43mq6mVdRCKZBe"
    "W28/1fY8C6kcpPLJXF+Apb/C/B+gfh1cD5x2GQjaBxswBqwFC0IaOjI41+bNnqKxL/yjRtX5"
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    "7HCEfEAAAAAASUVORK5CYII=")

#----------------------------------------------------------------------
_yes = PyEmbeddedImage(
    "iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABHNCSVQICAgIfAhkiAAAAjdJ"
    "REFUOI2tksFLk3Ecxp+97975vmuve1dWuiUTNIy1JlsLpkZG0aXLbv0B0aVDUMfVQTp0jJpF"
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    "AVgwjcaBBdIovP2eyKMLPYNdM+7kNKZA9i3gR+ENCeF4Hx+8VigVBgrKWrXKGp/2JeCfwhsW"
    "Q/HTQiCaVTOYUiZtDuoMQqefrc1S9+uOEGNSRzqd+4j72/c1l4OOQNwn+aOFWg5TdBJEIKbH"
    "dI9zHLMt6H3lHrjScfU5x3DSmOXNrVUUxwFQ6S3vDdh9cZ/zTHSz8R0pMguGMKaRMuX5peQ9"
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    "eQCwssR2NFfOtNXsFZx09SLkDnfSlsYTluUy7a3Hz6mWMrLGKswiJaV0WS6Uyr9gAGC7It0L"
    "WrWYm99K9VdcqugSD8Pd6nG6RNeJCq9ZstwqNL1CMl/z8npdiRkPd2AAYJcTy41FcSVZt+lK"
    "na9FaLspCg4ehDew3qJgs6qStUxerhItlr+h74KB5iPNgVZuGkm6QpQWmy3i8AoiY7dA1XTy"
    "LZuVGYHGZi8t/gbvCABgDFS7vpVEgSgS29bv5CR7XtmQjxxyxt77En+Edwt+Svpua3MbRT5T"
    "a9QXPGL7gxc9L/eE98wwHWaG6JD1783/kB9qTvueLt8LjwAAAABJRU5ErkJggg==")


class StdDialogButtonSizer(wx.BoxSizer):
    """ wxWidgets standard dialog button sizer. """

    def __init__(self):
        """ Default class constructor. """

        wx.BoxSizer.__init__(self, wx.HORIZONTAL)
        
        self._buttonAffirmative = None
        self._buttonApply = None
        self._buttonNegative = None
        self._buttonCancel = None
        self._buttonHelp = None


    def AddButton(self, mybutton):
        """
        Add a button to the sizer.

        @param mybutton: the button to add.
        """

        buttonId = mybutton.GetId()
        
        if buttonId in [wx.ID_OK, wx.ID_YES, wx.ID_SAVE]:    
            self._buttonAffirmative = mybutton

        elif buttonId == wx.ID_APPLY:
            self._buttonApply = mybutton
        elif buttonId == wx.ID_NO:
            self._buttonNegative = mybutton
        elif buttonId in [wx.ID_CANCEL, wx.ID_CLOSE]:
            self._buttonCancel = mybutton
        elif buttonId in [wx.ID_HELP, wx.ID_CONTEXT_HELP]:
            self._buttonHelp = mybutton
            

    def SetAffirmativeButton(self, button):
        """ Sets the affirmative button. """

        self._buttonAffirmative = button


    def SetNegativeButton(self, button):
        """ Sets the negative button. """

        self._buttonNegative = button


    def SetCancelButton(self, button):
        """ Sets the cancel button. """

        self._buttonCancel = button


    def Realize(self):
        """ Realizes the sizer depending on the Platform. """

        if wx.Platform == "__WXMAC__":
            
            self.Add((0, 0), 0, wx.LEFT, 6)
            if self._buttonHelp:
                self.Add(self._buttonHelp, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, 6)

            if self._buttonNegative:
                # HIG POLICE BULLETIN - destructive buttons need extra padding
                # 24 pixels on either side
                self.Add(self._buttonNegative, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, 12)
            
            # extra whitespace between help/negative and cancel/ok buttons
            self.Add((0, 0), 1, wx.EXPAND, 0)

            if self._buttonCancel:
                self.Add(self._buttonCancel, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, 6)
                # Cancel or help should be default
                # self._buttonCancel.SetDefaultButton()
            
            # Ugh, Mac doesn't really have apply dialogs, so I'll just
            # figure the best place is between Cancel and OK
            if self._buttonApply:
                self.Add(self._buttonApply, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, 6)

            if self._buttonAffirmative:
                self.Add(self._buttonAffirmative, 0, wx.ALIGN_CENTRE | wx.LEFT, 6)
                if self._buttonAffirmative.GetId() == wx.ID_SAVE:
                    # these buttons have set labels under Mac so we should use them
                    self._buttonAffirmative.SetLabel(_("Save"))
                    if self._buttonNegative:
                        self._buttonNegative.SetLabel(_("Don't Save"))
                
            # Extra space around and at the right
            self.Add((12, 24))
            
        elif wx.Platform == "__WXGTK__":

            self.Add((0, 0), 0, wx.LEFT, 9)
            if self._buttonHelp:
                self.Add(self._buttonHelp, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, 3)

            # extra whitespace between help and cancel/ok buttons
            self.Add((0, 0), 1, wx.EXPAND, 0)

            if self._buttonNegative:
                self.Add(self._buttonNegative, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, 3)
            
            # according to HIG, in explicit apply windows the order is:
            # [ Help                     Apply   Cancel   OK ]
            if self._buttonApply:
                self.Add(self._buttonApply, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, 3)

            if self._buttonCancel:
                self.Add(self._buttonCancel, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, 3)
                # Cancel or help should be default
                # self._buttonCancel.SetDefaultButton()
            
            if self._buttonAffirmative:
                self.Add(self._buttonAffirmative, 0, wx.ALIGN_CENTRE | wx.LEFT, 6)
                
        elif wx.Platform == "__WXMSW__":
            # Windows
            # center-justify buttons
            self.Add((0, 0), 1, wx.EXPAND, 0)

            if self._buttonAffirmative:
                self.Add(self._buttonAffirmative, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, self._buttonAffirmative.ConvertDialogSizeToPixels(wx.Size(2, 0)).x)

            if self._buttonNegative:
                self.Add(self._buttonNegative, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, self._buttonNegative.ConvertDialogSizeToPixels(wx.Size(2, 0)).x)
            
            if self._buttonCancel:
                self.Add(self._buttonCancel, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, self._buttonCancel.ConvertDialogSizeToPixels(wx.Size(2, 0)).x)
            
            if self._buttonApply:
                self.Add(self._buttonApply, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, self._buttonApply.ConvertDialogSizeToPixels(wx.Size(2, 0)).x)

            if self._buttonHelp:
                self.Add(self._buttonHelp, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, self._buttonHelp.ConvertDialogSizeToPixels(wx.Size(2, 0)).x)

            self.Add((0, 0), 1, wx.EXPAND, 0)

        else:
            # GTK+1 and any other platform

            if self._buttonHelp:
                self.Add(self._buttonHelp, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, self._buttonHelp.ConvertDialogSizeToPixels(wx.Size(4, 0)).x)

            # extra whitespace between help and cancel/ok buttons
            self.Add((0, 0), 1, wx.EXPAND, 0)

            if self._buttonApply:
                self.Add(self._buttonApply, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, self._buttonApply.ConvertDialogSizeToPixels(wx.Size(4, 0)).x)

            if self._buttonAffirmative:
                self.Add(self._buttonAffirmative, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, self._buttonAffirmative.ConvertDialogSizeToPixels(wx.Size(4, 0)).x)
            
            if self._buttonNegative:
                self.Add(self._buttonNegative, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, self._buttonNegative.ConvertDialogSizeToPixels(wx.Size(4, 0)).x)
            
            if self._buttonCancel:
                self.Add(self._buttonCancel, 0, wx.ALIGN_CENTRE | wx.LEFT | wx.RIGHT, self._buttonCancel.ConvertDialogSizeToPixels(wx.Size(4, 0)).x)
                # Cancel or help should be default
                # self._buttonCancel.SetDefaultButton()
            

class GenericMessageDialog(wx.Dialog):
    """
    Main class implementation, L{GenericMessageDialog} is a possible replacement
    for the standard wx.MessageDialog.
    """

    def __init__(self, parent, message, caption, style,
                 pos=wx.DefaultPosition, size=wx.DefaultSize):
        """
        Default class constructor.

        @param parent: the L{GenericMessageDialog} parent (if any);
        @param message: the message in the main body of the dialog;
        @param caption: the dialog title;
        @param style: the dialog style;
        @param pos: the dialog position on screen;
        @param size: the dialog size.
        """

        wx.Dialog.__init__(self, parent, wx.ID_ANY, caption, pos,
                           size, wx.DEFAULT_DIALOG_STYLE|wx.WANTS_CHARS)

        self._dialogStyle = style        

        topsizer = wx.BoxSizer(wx.VERTICAL)
        icon_text = wx.BoxSizer(wx.HORIZONTAL)

        case = self._dialogStyle & wx.ICON_MASK
        
        if case == wx.ICON_ERROR:
            bitmap = _error

        elif case == wx.ICON_INFORMATION:
            bitmap = _information

        elif case == wx.ICON_WARNING:
            bitmap = _warning

        elif case == wx.ICON_QUESTION:
            bitmap = _question

        # Populate the sizers...
        icon = wx.StaticBitmap(self, -1, bitmap.GetBitmap())
        icon_text.Add(icon, 0, wx.ALIGN_CENTER_HORIZONTAL)
        icon_text.Add(self.CreateTextSizer(message), 1, wx.ALIGN_CENTER | wx.LEFT, 10)

        topsizer.Add(icon_text, 1, wx.EXPAND | wx.LEFT | wx.RIGHT | wx.TOP, 10)

        center_flag = wx.EXPAND
        if self._dialogStyle & wx.YES_NO:
            center_flag |= wx.ALIGN_CENTRE

        sizerBtn = self.CreateSeparatedButtonSizer(self._dialogStyle & self.ButtonSizerFlags)
        if sizerBtn:
            topsizer.Add(sizerBtn, 0, center_flag | wx.ALL, 10)

        self.SetAutoLayout(True)
        self.SetSizer(topsizer)

        topsizer.SetSizeHints(self)
        topsizer.Fit(self)
        size = self.GetSize()
        
        if size.x < size.y*3/2:
            size.x = size.y*3/2
            self.SetSize(size)

        self.Layout()
        self.Centre(wx.BOTH | wx.CENTER_FRAME)

        self.Bind(wx.EVT_BUTTON, self.OnYes, id=wx.ID_YES)
        self.Bind(wx.EVT_BUTTON, self.OnOk, id=wx.ID_OK)
        self.Bind(wx.EVT_BUTTON, self.OnNo, id=wx.ID_NO)
        self.Bind(wx.EVT_BUTTON, self.OnCancel, id=wx.ID_CANCEL)

        for child in self.GetChildren():
            if isinstance(child, wx.lib.buttons.ThemedGenBitmapTextButton):
                # Handles the key down for the buttons...
                child.Bind(wx.EVT_KEY_DOWN, self.OnKeyDown)
                child.SetUseFocusIndicator(False)

        self.Bind(wx.EVT_NAVIGATION_KEY, self.OnNavigation)
        self.SwitchFocus()
        
        
    def OnYes(self, event):
        """ L{GenericMessageDialog} had received a wx.ID_YES answer. """

        self.EndModal(wx.ID_YES)


    def OnOk(self, event):
        """ L{GenericMessageDialog} had received a wx.ID_OK answer. """

        self.EndModal(wx.ID_OK)


    def OnNo(self, event):
        """ L{GenericMessageDialog} had received a wx.ID_NO answer. """

        self.EndModal(wx.ID_NO)


    def OnCancel(self, event):
        """ L{GenericMessageDialog} had received a wx.ID_CANCEL answer. """

        # Allow cancellation via ESC/Close button except if
        # only YES and NO are specified.
        
        if self._dialogStyle & wx.YES_NO != wx.YES_NO or self._dialogStyle & wx.CANCEL:
            self.EndModal(wx.ID_CANCEL)


    def OnKeyDown(self, event):
        """ Handles the wx.EVT_KEY_DOWN event for L{GenericMessageDialog}. """

        key = event.GetKeyCode()
        if key == wx.WXK_ESCAPE:
            self.OnCancel(None)

        ids = []
        for child in self.GetChildren():
            if isinstance(child, wx.lib.buttons.ThemedGenBitmapTextButton):
                ids.append(child.GetId())

        if key in [ord("y"), ord("Y")] and wx.ID_YES in ids:
            self.OnYes(None)
        elif key in [ord("n"), ord("N")] and wx.ID_NO in ids:
            self.OnNo(None)
        elif key in [ord("c"), ord("C")] and wx.ID_CANCEL in ids:
            self.OnCancel(None)
        elif key in [ord("o"), ord("O")] and wx.ID_OK in ids:
            self.OnOk(None)
            
        event.Skip()


    def OnNavigation(self, event):
        """ Handles the wx.EVT_NAVIGATION_KEY event for L{GenericMessageDialog}. """

        # Switch the focus between buttons...
        if wx.GetKeyState(wx.WXK_LEFT) or wx.GetKeyState(wx.WXK_RIGHT) or \
           wx.GetKeyState(wx.WXK_DOWN) or wx.GetKeyState(wx.WXK_UP) or \
           wx.GetKeyState(wx.WXK_NUMPAD_LEFT) or wx.GetKeyState(wx.WXK_NUMPAD_RIGHT) or \
           wx.GetKeyState(wx.WXK_NUMPAD_DOWN) or wx.GetKeyState(wx.WXK_NUMPAD_UP) or \
           event.IsFromTab():
            event.Skip()
            wx.CallAfter(self.SwitchFocus)
            return

        button = wx.Window.FindFocus()
        buttonId = button.GetId()
        self.EndModal(buttonId)
            

    def SwitchFocus(self):
        """ Switch focus between buttons. """

        current = wx.Window.FindFocus()
        font = self.GetFont()
        boldFont = wx.Font(font.GetPointSize(), font.GetFamily(), font.GetStyle(), wx.BOLD,
                           font.GetUnderlined(), font.GetFaceName())
        
        for child in self.GetChildren():
            if isinstance(child, wx.lib.buttons.ThemedGenBitmapTextButton):
                if child == current:
                    # Set a bold font for the current focused button
                    child.SetFont(boldFont)
                else:
                    # Restore the other buttons...
                    child.SetFont(font)
                child.Refresh()                

        
    def CreateButtonSizer(self, flags):
        """
        Creates a sizer with standard buttons.

        @param flags: a bit list of the following flags:
                      wx.OK, wx.CANCEL, wx.YES, wx.NO, wx.HELP, wx.NO_DEFAULT.

        @note: The sizer lays out the buttons in a manner appropriate to the platform.
        """

        sizer = self.CreateStdDialogButtonSizer(flags)

        return sizer


    def CreateSeparatedButtonSizer(self, flags):
        """
        Creates a sizer with standard buttons using CreateButtonSizer separated
        from the rest of the dialog contents by a horizontal wx.StaticLine.
        """

        sizer = self.CreateButtonSizer(flags)

        # Mac Human Interface Guidelines recommend not to use static lines as
        # grouping elements
        if wx.Platform != "__WXMAC__":
            topsizer = wx.BoxSizer(wx.VERTICAL)
            topsizer.AddF(wx.StaticLine(self), wx.SizerFlags().Expand().DoubleBorder(wx.BOTTOM))
            topsizer.AddF(sizer, wx.SizerFlags().Expand())
            sizer = topsizer
            
        return sizer


    def CreateStdDialogButtonSizer(self, flags):
        """
        Creates a StdDialogButtonSizer with standard buttons.

        @param flags: a bit list of the following flags:
                      wx.OK, wx.CANCEL, wx.YES, wx.NO, wx.HELP, wx.NO_DEFAULT.

        @note: The sizer lays out the buttons in a manner appropriate to the platform.
        """
        
        sizer = StdDialogButtonSizer()
        no = yes = ok = None
        if flags & wx.OK:
            # Remove unwanted flags...
            flags &= ~(wx.YES | wx.NO | wx.NO_DEFAULT)
        
        if flags & wx.OK:
            ok = buttons.ThemedGenBitmapTextButton(self, wx.ID_OK, _ok.GetBitmap(), _("OK"), size=(-1, 28))
            sizer.AddButton(ok)

        if flags & wx.CANCEL:
            cancel = buttons.ThemedGenBitmapTextButton(self, wx.ID_CANCEL, _cancel.GetBitmap(), _("Cancel"), size=(-1, 28))
            sizer.AddButton(cancel)
        
        if flags & wx.YES:
            yes = buttons.ThemedGenBitmapTextButton(self, wx.ID_YES, _yes.GetBitmap(), _("Yes"), size=(-1, 28))
            sizer.AddButton(yes)
        
        if flags & wx.NO:
            no = buttons.ThemedGenBitmapTextButton(self, wx.ID_NO, _no.GetBitmap(), _("No"), size=(-1, 28))
            sizer.AddButton(no)
                
        if flags & wx.HELP:
            help = buttons.ThemedGenBitmapTextButton(self, wx.ID_HELP, _help.GetBitmap(), _("Help"), size=(-1, 28))
            sizer.AddButton(help)
        
        if flags & wx.NO_DEFAULT:
            if no:
                no.SetDefault()
                no.SetFocus()
        else:
            if ok:
                ok.SetDefault()
                ok.SetFocus()
            elif yes:
                yes.SetDefault()
                yes.SetFocus()
            
        if flags & wx.OK:
            self.SetAffirmativeId(wx.ID_OK)
        elif flags & wx.YES:
            self.SetAffirmativeId(wx.ID_YES)

        sizer.Realize()

        return sizer

