///////////////////////////////////////////////////////////////////////////////
// Name:        wx/gtk/private.h
// Purpose:     wxGTK private macros, functions &c
// Author:      Vadim Zeitlin
// Modified by:
// Created:     12.03.02
// RCS-ID:      $Id$
// Copyright:   (c) 2002 Vadim Zeitlin <vadim@wxwindows.org>
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

#ifndef _WX_GTK_PRIVATE_H_
#define _WX_GTK_PRIVATE_H_

#include <gdk/gdk.h>
#include <gtk/gtk.h>

#include "wx/event.h"

// fail all version tests if the GTK+ version is so ancient that it doesn't
// even have GTK_CHECK_VERSION
#ifndef GTK_CHECK_VERSION
    #define GTK_CHECK_VERSION(a, b, c) 0
#endif

#ifdef __WXGTK20__
#if wxUSE_UNICODE
    #define wxGTK_CONV(s) wxConvUTF8.cWX2MB(s)
    #define wxGTK_CONV_BACK(s) wxConvUTF8.cMB2WX(s)
#else
    #define wxGTK_CONV(s) wxConvUTF8.cWC2MB( wxConvLocal.cWX2WC(s) )
    #define wxGTK_CONV_BACK(s)  wxConvLocal.cWC2WX( (wxConvUTF8.cMB2WC( s ) ) )
#endif
#else
    #define wxGTK_CONV(s) s.c_str()
    #define wxGTK_CONV_BACK(s) s
#endif


// GTK+ 2.0 compatibility define is broken when used from C++ as it
// casts enum to int implicitly
#ifdef __WXGTK20__
    #undef gtk_signal_disconnect_by_func
    #define gtk_signal_disconnect_by_func(object,func,data) \
        gtk_signal_compat_matched((object), (func), (data), \
                                  (GSignalMatchType)(G_SIGNAL_MATCH_FUNC | \
                                                     G_SIGNAL_MATCH_DATA), 0)
#endif

// child is not a member of GTK_BUTTON() any more in GTK+ 2.0
#ifdef __WXGTK20__
    #define BUTTON_CHILD(w) GTK_BIN((w))->child
#else
    #define BUTTON_CHILD(w) GTK_BUTTON((w))->child
#endif

// event_window has disappeared from GtkToggleButton in GTK+ 2.0
#ifdef __WXGTK20__
    #define TOGGLE_BUTTON_EVENT_WIN(w) GTK_BUTTON((w))->event_window
#else
    #define TOGGLE_BUTTON_EVENT_WIN(w) GTK_TOGGLE_BUTTON((w))->event_window
#endif

// gtk_editable_{copy|cut|paste}_clipboard() had an extra argument under
// previous GTK+ versions but no more
#if defined(__WXGTK20__) || (GTK_MINOR_VERSION > 0)
    #define DUMMY_CLIPBOARD_ARG
#else
    #define DUMMY_CLIPBOARD_ARG  ,0
#endif

// _GtkEditable is now private
#ifdef __WXGTK20__
    #define GET_EDITABLE_POS(w) gtk_editable_get_position(GTK_EDITABLE(w))
    #define SET_EDITABLE_POS(w, pos) \
        gtk_editable_set_position(GTK_EDITABLE(w), (pos))
#else
    #define GET_EDITABLE_POS(w) GTK_EDITABLE((w))->current_pos
    #define SET_EDITABLE_POS(w, pos) \
        GTK_EDITABLE((w))->current_pos = (pos)
#endif

// this GtkNotebook struct field has been renamed
#ifdef __WXGTK20__
    #define NOTEBOOK_PANEL(nb)  GTK_NOTEBOOK(nb)->event_window
#else
    #define NOTEBOOK_PANEL(nb)  GTK_NOTEBOOK(nb)->panel
#endif

#ifdef __WXGTK20__
    #define SCROLLBAR_CBACK_ARG
    #define GET_SCROLL_TYPE(w)   GTK_SCROLL_JUMP
#else
    #define SCROLLBAR_CBACK_ARG
    #define GET_SCROLL_TYPE(w)   GTK_RANGE((w))->scroll_type
#endif

// translate a GTK+ scroll type to a wxEventType
inline wxEventType GtkScrollTypeToWx(guint scrollType)
{
    wxEventType command;
    switch ( scrollType )
    {
        case GTK_SCROLL_STEP_BACKWARD:
            command = wxEVT_SCROLL_LINEUP;
            break;

        case GTK_SCROLL_STEP_FORWARD:
            command = wxEVT_SCROLL_LINEDOWN;
            break;

        case GTK_SCROLL_PAGE_BACKWARD:
            command = wxEVT_SCROLL_PAGEUP;
            break;

        case GTK_SCROLL_PAGE_FORWARD:
            command = wxEVT_SCROLL_PAGEDOWN;
            break;

        default:
            command = wxEVT_SCROLL_THUMBTRACK;
    }

    return command;
}

inline wxEventType GtkScrollWinTypeToWx(guint scrollType)
{
    // GtkScrollTypeToWx() returns SCROLL_XXX, not SCROLLWIN_XXX as we need
    return GtkScrollTypeToWx(scrollType) +
            wxEVT_SCROLLWIN_TOP - wxEVT_SCROLL_TOP;
}



// In wxGTK2 the wxMessageDialog is not a real wxDialog, instead a
// gtk_message_dialog is created, shown and destroyed inside the ShowModal()
// call.  Since its m_widget will always be NULL there would normally be lots
// of wxCHECK asserts triggered by calling base class methods that are valid
// calls (or just ignored) on other wx ports.  Using these macros instead of
// wxCHECK will silence those asserts if the window is a wxMessageDialog and
// will let the method doing the check just be ignored in that case.  If it's
// not a wxMessageDialog then it behaves just like before.
//
// NOTE: Once more native dialogs are used then this will need to be
//       generalized a bit, perhaps with a IsNativeGTKDialog method or
//       something...

#if wxUSE_MSGDLG && defined(__WXGTK20__) && !defined(__WXGPE__)
#define wxCHECK_VALID_WIDGET(rc)   \
    if (!(m_widget != NULL)) { \
        if (!wxIsKindOf(this, wxMessageDialog)) { wxFAIL_MSG(wxT("invalid window")); } \
        return rc; \
    }

#define wxCHECK_VALID_WIDGET_RET()    \
    if (!(m_widget != NULL)) { \
        if (!wxIsKindOf(this, wxMessageDialog)) { wxFAIL_MSG(wxT("invalid window")); } \
        return; \
    }

#else  // not wxGTK2, so just use wxCHECK
#define wxCHECK_VALID_WIDGET(rc)   wxCHECK_MSG( (m_widget != NULL), rc, wxT("invalid window") )
#define wxCHECK_VALID_WIDGET_RET() wxCHECK_RET( (m_widget != NULL),     wxT("invalid window") );
#endif


#endif // _WX_GTK_PRIVATE_H_