#----------------------------------------------------------------------
# Name:        wxPython.lib.activexwrapper
# Purpose:     a wxWindow derived class that can hold an ActiveX control
#
# Author:      Mike Fletcher, Robin Dunn
#
# RCS-ID:      $Id$
# Copyright:   (c) 2000 by Total Control Software
# Licence:     wxWindows license
#----------------------------------------------------------------------

from wxPython.wx import *

try:
    import win32ui
except ImportError:
    raise ImportError( "Cannot find win32ui module, wxWindows ActiveXControl module cannot be loaded")

### Following makes it possible to include this module without
# needing to include the (rather large) win32con module...
##from win32con import WS_TABSTOP, WS_VISIBLE
WS_TABSTOP = 0x10000
WS_VISIBLE = 0x10000000

class ActiveXWrapper( wxWindow ):
    """
    Class providing easy integration of ActiveXControls into
    wxPython GUI environments.  Pass an instantiated control class (one
    which inherits from pywin.mfc.activex.Control and a particular control
    class generated by gencache) in the argument "control".  Alternatively,
    pass the instantiated control to the SetControl method to allow for
    specifying the win32 style, id, etceteras
    """
    def __init__( self, parent, ID=-1, pos = wxDefaultPosition, size = wxDefaultSize,
                  style = 0,
                  name = "ActiveXControlWindow",
                  control = None,
                  controlName = "Control",
                  eraseBackground = 1,
        ):
        wxWindow.__init__( self, parent, ID, pos, size, style, name )
        win32ui.EnableControlContainer()
        self.windowPointer = win32ui.CreateWindowFromHandle(self.GetHandle())
        if control:
            self.SetControl( control, name )
        EVT_SIZE( self, self.OnSize)
        if not eraseBackground:
            def nullfunction( event ): pass
            EVT_ERASE_BACKGROUND( self, nullfunction )


    def SetControl( self, controlObject, name="Control",
                    style=WS_TABSTOP | WS_VISIBLE, ID=None):
        """
        Pass a pre-built control object, calls the control's
        CreateControl method with the proper arguments to make it a
        child of this window
        """
        self.control = controlObject
        w,h = self.GetSizeTuple()
        if not ID:
            ID = wxNewId()
        self.control.CreateControl( name, style, (0,0,w,h),
                                    self.windowPointer,
                                    ID)


    def Cleanup( self ):
        """Delete the reference to the control, to ensure that it is dereferenced."""
        self.control = None
        self.windowPointer = None

    def OnSize( self, event=None ):
        """wxPython resize event, call MoveWindow on the control"""
        size = self.GetClientSize()
        self.control.MoveWindow( (0,0,size.width,size.height),1)