gtk/modules/engines/ms-windows/xp_theme.c

/* MS-Windows Engine (aka GTK-Wimp)
 *
 * Copyright (C) 2003, 2004 Raymond Penners <raymond@dotsphinx.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#define _WIN32_WINNT 0x0501

#include "xp_theme.h"

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <windows.h>
#include <math.h>
#include <string.h>
#include <stdio.h>

/* #include "gdk/gdkwin32.h" */
#include "gdk/win32/gdkwin32.h"

#include "xp_theme_defs.h"

#ifndef TMT_CAPTIONFONT

/* These aren't in mingw's "w32api" headers, nor in the Platform SDK
 * headers.
 */
#define TMT_CAPTIONFONT 801
#define TMT_MENUFONT 803
#define TMT_STATUSFONT 804
#define TMT_MSGBOXFONT 805
#endif

#define GP_LINEHORZ 2
#define GP_LINEVERT 3
#define TP_SEPARATOR           5
#define TP_SEPARATORVERT       6

/* GLOBALS LINEHORZ states */
#define LHS_FLAT   1
#define LHS_RAISED 2
#define LHS_SUNKEN 3

/* GLOBAL LINEVERT states */
#define LVS_FLAT   1
#define LVS_RAISED 2
#define LVS_SUNKEN 3

/* TRACKBAR parts */
#define TKP_TRACK       1
#define TKP_TRACKVERT   2
#define TKP_THUMB       3
#define TKP_THUMBBOTTOM 4
#define TKP_THUMBTOP    5
#define TKP_THUMBVERT   6
#define TKP_THUMBLEFT   7
#define TKP_THUMBRIGHT  8
#define TKP_TICS        9
#define TKP_TICSVERT    10

#define TRS_NORMAL 1

static const LPCWSTR class_descriptors[] = {
    L"Scrollbar",		/* XP_THEME_CLASS_SCROLLBAR */
    L"Button",			/* XP_THEME_CLASS_BUTTON */
    L"Header",			/* XP_THEME_CLASS_HEADER */
    L"ComboBox",		/* XP_THEME_CLASS_COMBOBOX */
    L"Tab",			    /* XP_THEME_CLASS_TAB */
    L"Edit",			/* XP_THEME_CLASS_EDIT */
    L"TreeView",		/* XP_THEME_CLASS_TREEVIEW */
    L"Spin",			/* XP_THEME_CLASS_SPIN */
    L"Progress",		/* XP_THEME_CLASS_PROGRESS */
    L"Tooltip",			/* XP_THEME_CLASS_TOOLTIP */
    L"Rebar",			/* XP_THEME_CLASS_REBAR */
    L"Toolbar",			/* XP_THEME_CLASS_TOOLBAR */
    L"Globals",			/* XP_THEME_CLASS_GLOBALS */
    L"Menu",			/* XP_THEME_CLASS_MENU */
    L"Window",			/* XP_THEME_CLASS_WINDOW */
    L"Status",			/* XP_THEME_CLASS_STATUS */
    L"Trackbar"			/* XP_THEME_CLASS_TRACKBAR */
};

static const short element_part_map[XP_THEME_ELEMENT__SIZEOF] = {
    BP_CHECKBOX,
    BP_CHECKBOX,
    BP_PUSHBUTTON,
    HP_HEADERITEM,
    CP_DROPDOWNBUTTON,
    TABP_BODY,
    TABP_TABITEM,
    TABP_TABITEMLEFTEDGE,
   	TABP_TABITEMRIGHTEDGE,
    TABP_PANE,
    SBP_THUMBBTNHORZ,
    SBP_THUMBBTNVERT,
    SBP_ARROWBTN,
    SBP_ARROWBTN,
    SBP_ARROWBTN,
    SBP_ARROWBTN,
    SBP_GRIPPERHORZ,
    SBP_GRIPPERVERT,
    SBP_LOWERTRACKHORZ,
    SBP_LOWERTRACKVERT,
    EP_EDITTEXT,
    BP_PUSHBUTTON,
    SPNP_UP,
    SPNP_DOWN,
    BP_RADIOBUTTON,
    BP_RADIOBUTTON,
    TVP_GLYPH,
    TVP_GLYPH,
    PP_CHUNK,
    PP_CHUNKVERT,
    PP_BAR,
    PP_BARVERT,
    TTP_STANDARD,
    0 /* RP_BAND */ ,
    RP_GRIPPER,
    RP_GRIPPERVERT,
    RP_CHEVRON,
    TP_BUTTON,
    MP_MENUITEM,
    MP_SEPARATOR,
    SP_GRIPPER,
    SP_PANE,
    GP_LINEHORZ,
    GP_LINEVERT,
    TP_SEPARATOR,
    TP_SEPARATORVERT,
    TKP_TRACK,
    TKP_TRACKVERT,
    TKP_THUMB,
    TKP_THUMBVERT,
    TKP_TICS,
    TKP_TICSVERT
};

static HINSTANCE uxtheme_dll = NULL;
static HTHEME open_themes[XP_THEME_CLASS__SIZEOF];
static gboolean use_xp_theme = FALSE;

typedef HRESULT (FAR PASCAL * GetThemeSysFontFunc)
    (HTHEME hTheme, int iFontID, OUT LOGFONT * plf);
typedef int (FAR PASCAL * GetThemeSysSizeFunc) (HTHEME hTheme, int iSizeId);
typedef COLORREF (FAR PASCAL * GetThemeSysColorFunc) (HTHEME hTheme,
						      int iColorID);
typedef HTHEME (FAR PASCAL * OpenThemeDataFunc) (HWND hwnd,
						 LPCWSTR pszClassList);
typedef HRESULT (FAR PASCAL * CloseThemeDataFunc) (HTHEME theme);
typedef HRESULT (FAR PASCAL * DrawThemeBackgroundFunc)
    (HTHEME hTheme, HDC hdc, int iPartId, int iStateId,
     const RECT * pRect, const RECT * pClipRect);
typedef HRESULT (FAR PASCAL * EnableThemeDialogTextureFunc) (HWND hwnd,
							     DWORD dwFlags);
typedef BOOL (FAR PASCAL * IsThemeActiveFunc) (VOID);
typedef BOOL (FAR PASCAL * IsAppThemedFunc) (VOID);
typedef BOOL (FAR PASCAL *
	      IsThemeBackgroundPartiallyTransparentFunc) (HTHEME hTheme,
							  int iPartId,
							  int iStateId);
typedef HRESULT (FAR PASCAL * DrawThemeParentBackgroundFunc) (HWND hwnd,
							      HDC hdc,
							      RECT * prc);

static GetThemeSysFontFunc get_theme_sys_font_func = NULL;
static GetThemeSysColorFunc get_theme_sys_color_func = NULL;
static GetThemeSysSizeFunc get_theme_sys_metric_func = NULL;
static OpenThemeDataFunc open_theme_data_func = NULL;
static CloseThemeDataFunc close_theme_data_func = NULL;
static DrawThemeBackgroundFunc draw_theme_background_func = NULL;
static EnableThemeDialogTextureFunc enable_theme_dialog_texture_func = NULL;
static IsThemeActiveFunc is_theme_active_func = NULL;
static IsAppThemedFunc is_app_themed_func = NULL;
static IsThemeBackgroundPartiallyTransparentFunc
    is_theme_partially_transparent_func = NULL;
static DrawThemeParentBackgroundFunc draw_theme_parent_background_func = NULL;

static void
xp_theme_close_open_handles (void)
{
    int i;

    for (i = 0; i < XP_THEME_CLASS__SIZEOF; i++)
	{
	    if (open_themes[i])
		{
		    close_theme_data_func (open_themes[i]);
		    open_themes[i] = NULL;
		}
	}
}

void
xp_theme_init (void)
{
    if (uxtheme_dll)
	return;

    memset (open_themes, 0, sizeof (open_themes));

    uxtheme_dll = LoadLibrary ("uxtheme.dll");
    if (!uxtheme_dll)
	return;

    is_app_themed_func =
	(IsAppThemedFunc) GetProcAddress (uxtheme_dll, "IsAppThemed");

    if (is_app_themed_func)
	{
	    is_theme_active_func =
		(IsThemeActiveFunc) GetProcAddress (uxtheme_dll,
						    "IsThemeActive");
	    open_theme_data_func =
		(OpenThemeDataFunc) GetProcAddress (uxtheme_dll,
						    "OpenThemeData");
	    close_theme_data_func =
		(CloseThemeDataFunc) GetProcAddress (uxtheme_dll,
						     "CloseThemeData");
	    draw_theme_background_func =
		(DrawThemeBackgroundFunc) GetProcAddress (uxtheme_dll,
							  "DrawThemeBackground");
	    enable_theme_dialog_texture_func =
		(EnableThemeDialogTextureFunc) GetProcAddress (uxtheme_dll,
							       "EnableThemeDialogTexture");
	    get_theme_sys_font_func =
		(GetThemeSysFontFunc) GetProcAddress (uxtheme_dll,
						      "GetThemeSysFont");
	    get_theme_sys_color_func =
		(GetThemeSysColorFunc) GetProcAddress (uxtheme_dll,
						       "GetThemeSysColor");
	    get_theme_sys_metric_func =
		(GetThemeSysSizeFunc) GetProcAddress (uxtheme_dll,
						      "GetThemeSysSize");
	    is_theme_partially_transparent_func =
		(IsThemeBackgroundPartiallyTransparentFunc)
		GetProcAddress (uxtheme_dll,
				"IsThemeBackgroundPartiallyTransparent");
	    draw_theme_parent_background_func =
		(DrawThemeParentBackgroundFunc) GetProcAddress (uxtheme_dll,
								"DrawThemeParentBackground");
	}

    if (is_app_themed_func && is_theme_active_func) {
        use_xp_theme = (is_app_themed_func () && is_theme_active_func ());
    }
    else {
        use_xp_theme = FALSE;
    }
}

void
xp_theme_reset (void)
{
    xp_theme_close_open_handles ();

    if (is_app_themed_func && is_theme_active_func) {
        use_xp_theme = (is_app_themed_func () && is_theme_active_func ());
    }
    else {
        use_xp_theme = FALSE;
    }
}

void
xp_theme_exit (void)
{
    if (!uxtheme_dll)
	return;

    xp_theme_close_open_handles ();

    FreeLibrary (uxtheme_dll);
    uxtheme_dll = NULL;
	use_xp_theme = FALSE;

    is_app_themed_func = NULL;
    is_theme_active_func = NULL;
    open_theme_data_func = NULL;
    close_theme_data_func = NULL;
    draw_theme_background_func = NULL;
    enable_theme_dialog_texture_func = NULL;
    get_theme_sys_font_func = NULL;
    get_theme_sys_color_func = NULL;
    get_theme_sys_metric_func = NULL;
    is_theme_partially_transparent_func = NULL;
    draw_theme_parent_background_func = NULL;
}

static HTHEME
xp_theme_get_handle_by_class (XpThemeClass klazz)
{
    if (!open_themes[klazz] && open_theme_data_func)
	{
	    open_themes[klazz] =
		open_theme_data_func (NULL, class_descriptors[klazz]);
	}
    return open_themes[klazz];
}

static HTHEME
xp_theme_get_handle_by_element (XpThemeElement element)
{
    HTHEME ret = NULL;
    XpThemeClass klazz = XP_THEME_CLASS__SIZEOF;

    switch (element)
	{
	case XP_THEME_ELEMENT_TOOLTIP:
	    klazz = XP_THEME_CLASS_TOOLTIP;
	    break;

	case XP_THEME_ELEMENT_REBAR:
	case XP_THEME_ELEMENT_REBAR_GRIPPER_H:
	case XP_THEME_ELEMENT_REBAR_GRIPPER_V:
	case XP_THEME_ELEMENT_REBAR_CHEVRON:
	    klazz = XP_THEME_CLASS_REBAR;
	    break;

	case XP_THEME_ELEMENT_SCALE_TROUGH_H:
	case XP_THEME_ELEMENT_SCALE_TROUGH_V:
	case XP_THEME_ELEMENT_SCALE_SLIDER_H:
	case XP_THEME_ELEMENT_SCALE_SLIDER_V:
	case XP_THEME_ELEMENT_SCALE_TICS_H:
	case XP_THEME_ELEMENT_SCALE_TICS_V:
	    klazz = XP_THEME_CLASS_TRACKBAR;
	    break;

	case XP_THEME_ELEMENT_STATUS_GRIPPER:
	case XP_THEME_ELEMENT_STATUS_PANE:
	    klazz = XP_THEME_CLASS_STATUS;
	    break;

	case XP_THEME_ELEMENT_TOOLBAR_BUTTON:
	case XP_THEME_ELEMENT_TOOLBAR_SEPARATOR_H:
	case XP_THEME_ELEMENT_TOOLBAR_SEPARATOR_V:
	    klazz = XP_THEME_CLASS_TOOLBAR;
	    break;

	case XP_THEME_ELEMENT_MENU_ITEM:
	case XP_THEME_ELEMENT_MENU_SEPARATOR:
	    klazz = XP_THEME_CLASS_MENU;
	    break;

	case XP_THEME_ELEMENT_PRESSED_CHECKBOX:
	case XP_THEME_ELEMENT_CHECKBOX:
	case XP_THEME_ELEMENT_BUTTON:
	case XP_THEME_ELEMENT_DEFAULT_BUTTON:
	case XP_THEME_ELEMENT_PRESSED_RADIO_BUTTON:
	case XP_THEME_ELEMENT_RADIO_BUTTON:
	    klazz = XP_THEME_CLASS_BUTTON;
	    break;

	case XP_THEME_ELEMENT_LIST_HEADER:
	    klazz = XP_THEME_CLASS_HEADER;
	    break;

	case XP_THEME_ELEMENT_COMBOBUTTON:
	    klazz = XP_THEME_CLASS_COMBOBOX;
	    break;

	case XP_THEME_ELEMENT_BODY:
	case XP_THEME_ELEMENT_TAB_ITEM:
	case XP_THEME_ELEMENT_TAB_ITEM_LEFT_EDGE:
	case XP_THEME_ELEMENT_TAB_ITEM_RIGHT_EDGE:
	case XP_THEME_ELEMENT_TAB_PANE:
	    klazz = XP_THEME_CLASS_TAB;
	    break;

	case XP_THEME_ELEMENT_SCROLLBAR_V:
	case XP_THEME_ELEMENT_SCROLLBAR_H:
	case XP_THEME_ELEMENT_ARROW_UP:
	case XP_THEME_ELEMENT_ARROW_DOWN:
	case XP_THEME_ELEMENT_ARROW_LEFT:
	case XP_THEME_ELEMENT_ARROW_RIGHT:
	case XP_THEME_ELEMENT_SCROLLBAR_GRIPPER_V:
	case XP_THEME_ELEMENT_SCROLLBAR_GRIPPER_H:
	case XP_THEME_ELEMENT_TROUGH_V:
	case XP_THEME_ELEMENT_TROUGH_H:
	    klazz = XP_THEME_CLASS_SCROLLBAR;
	    break;

	case XP_THEME_ELEMENT_EDIT_TEXT:
	    klazz = XP_THEME_CLASS_EDIT;
	    break;

	case XP_THEME_ELEMENT_SPIN_BUTTON_UP:
	case XP_THEME_ELEMENT_SPIN_BUTTON_DOWN:
	    klazz = XP_THEME_CLASS_SPIN;
	    break;

	case XP_THEME_ELEMENT_PROGRESS_BAR_H:
	case XP_THEME_ELEMENT_PROGRESS_BAR_V:
	case XP_THEME_ELEMENT_PROGRESS_TROUGH_H:
	case XP_THEME_ELEMENT_PROGRESS_TROUGH_V:
	    klazz = XP_THEME_CLASS_PROGRESS;
	    break;

	case XP_THEME_ELEMENT_TREEVIEW_EXPANDER_OPENED:
	case XP_THEME_ELEMENT_TREEVIEW_EXPANDER_CLOSED:
	    klazz = XP_THEME_CLASS_TREEVIEW;
	    break;

	case XP_THEME_ELEMENT_LINE_H:
	case XP_THEME_ELEMENT_LINE_V:
	    klazz = XP_THEME_CLASS_GLOBALS;
	    break;

	default:
	    break;
	}

    if (klazz != XP_THEME_CLASS__SIZEOF)
	{
	    ret = xp_theme_get_handle_by_class (klazz);
	}
    return ret;
}

static int
xp_theme_map_gtk_state (XpThemeElement element, GtkStateType state)
{
    int ret = 0;

    switch (element)
	{
	case XP_THEME_ELEMENT_TOOLTIP:
	    ret = TTSS_NORMAL;
	    break;

	case XP_THEME_ELEMENT_REBAR:
	    ret = 0;
	    break;

	case XP_THEME_ELEMENT_REBAR_GRIPPER_H:
	case XP_THEME_ELEMENT_REBAR_GRIPPER_V:
	    ret = 0;
	    break;

	case XP_THEME_ELEMENT_STATUS_GRIPPER:
	case XP_THEME_ELEMENT_STATUS_PANE:
	    ret = 1;
	    break;

	case XP_THEME_ELEMENT_REBAR_CHEVRON:
	    switch (state)
		{
		case GTK_STATE_PRELIGHT:
		    ret = CHEVS_HOT;
		    break;
		case GTK_STATE_SELECTED:
		case GTK_STATE_ACTIVE:
		    ret = CHEVS_PRESSED;
		    break;
		default:
		    ret = CHEVS_NORMAL;
		}
	    break;

	case XP_THEME_ELEMENT_TOOLBAR_SEPARATOR_H:
	case XP_THEME_ELEMENT_TOOLBAR_SEPARATOR_V:
	    ret = TS_NORMAL;
	    break;

	case XP_THEME_ELEMENT_TOOLBAR_BUTTON:
	    switch (state)
		{
		case GTK_STATE_ACTIVE:
		    ret = TS_PRESSED;
		    break;
		case GTK_STATE_PRELIGHT:
		    ret = TS_HOT;
		    break;
		case GTK_STATE_INSENSITIVE:
		    ret = TS_DISABLED;
		    break;
		default:
		    ret = TS_NORMAL;
		}
	    break;

	case XP_THEME_ELEMENT_TAB_PANE:
	    ret = 1;
	    break;

	case XP_THEME_ELEMENT_TAB_ITEM_LEFT_EDGE:
	case XP_THEME_ELEMENT_TAB_ITEM_RIGHT_EDGE:
	case XP_THEME_ELEMENT_TAB_ITEM:
	    switch (state)
		{
		case GTK_STATE_PRELIGHT:
		    ret = TIS_HOT;
		    break;
		case GTK_STATE_INSENSITIVE:
		    ret = TIS_DISABLED;
		    break;
		case GTK_STATE_SELECTED:
		case GTK_STATE_ACTIVE:
		    ret = TIS_NORMAL;
		    break;
		default:
		    ret = TIS_SELECTED;
		}
	    break;

	case XP_THEME_ELEMENT_EDIT_TEXT:
	    switch (state)
		{
		case GTK_STATE_PRELIGHT:
		    ret = ETS_FOCUSED;
		    break;
		case GTK_STATE_INSENSITIVE:
		    ret = ETS_READONLY;
		    break;
		case GTK_STATE_SELECTED:
		case GTK_STATE_ACTIVE:
		default:
		    ret = ETS_NORMAL;
		}
	    break;

	case XP_THEME_ELEMENT_TROUGH_H:
	case XP_THEME_ELEMENT_TROUGH_V:
	    ret = SCRBS_NORMAL;
	    break;

	case XP_THEME_ELEMENT_SCROLLBAR_H:
	case XP_THEME_ELEMENT_SCROLLBAR_V:
	    switch (state)
		{
		case GTK_STATE_SELECTED:
		case GTK_STATE_ACTIVE:
		    ret = SCRBS_PRESSED;
		    break;
		case GTK_STATE_PRELIGHT:
		    ret = SCRBS_HOT;
		    break;
		case GTK_STATE_INSENSITIVE:
		    ret = SCRBS_DISABLED;
		    break;
		default:
		    ret = SCRBS_NORMAL;
		}
	    break;

	case XP_THEME_ELEMENT_ARROW_DOWN:
	    switch (state)
		{
		case GTK_STATE_ACTIVE:
		    ret = ABS_DOWNPRESSED;
		    break;
		case GTK_STATE_PRELIGHT:
		    ret = ABS_DOWNHOT;
		    break;
		case GTK_STATE_INSENSITIVE:
		    ret = ABS_DOWNDISABLED;
		    break;
		default:
		    ret = ABS_DOWNNORMAL;
		}
	    break;

	case XP_THEME_ELEMENT_ARROW_UP:
	    switch (state)
		{
		case GTK_STATE_ACTIVE:
		    ret = ABS_UPPRESSED;
		    break;
		case GTK_STATE_PRELIGHT:
		    ret = ABS_UPHOT;
		    break;
		case GTK_STATE_INSENSITIVE:
		    ret = ABS_UPDISABLED;
		    break;
		default:
		    ret = ABS_UPNORMAL;
		}
	    break;

	case XP_THEME_ELEMENT_ARROW_LEFT:
	    switch (state)
		{
		case GTK_STATE_ACTIVE:
		    ret = ABS_LEFTPRESSED;
		    break;
		case GTK_STATE_PRELIGHT:
		    ret = ABS_LEFTHOT;
		    break;
		case GTK_STATE_INSENSITIVE:
		    ret = ABS_LEFTDISABLED;
		    break;
		default:
		    ret = ABS_LEFTNORMAL;
		}
	    break;

	case XP_THEME_ELEMENT_ARROW_RIGHT:
	    switch (state)
		{
		case GTK_STATE_ACTIVE:
		    ret = ABS_RIGHTPRESSED;
		    break;
		case GTK_STATE_PRELIGHT:
		    ret = ABS_RIGHTHOT;
		    break;
		case GTK_STATE_INSENSITIVE:
		    ret = ABS_RIGHTDISABLED;
		    break;
		default:
		    ret = ABS_RIGHTNORMAL;
		}
	    break;

	case XP_THEME_ELEMENT_CHECKBOX:
	case XP_THEME_ELEMENT_RADIO_BUTTON:
	    switch (state)
		{
		case GTK_STATE_SELECTED:
		    ret = CBS_UNCHECKEDPRESSED;
		    break;
		case GTK_STATE_PRELIGHT:
		    ret = CBS_UNCHECKEDHOT;
		    break;
		case GTK_STATE_INSENSITIVE:
		    ret = CBS_UNCHECKEDDISABLED;
		    break;
		default:
		    ret = CBS_UNCHECKEDNORMAL;
		}
	    break;

	case XP_THEME_ELEMENT_PRESSED_CHECKBOX:
	case XP_THEME_ELEMENT_PRESSED_RADIO_BUTTON:
	    switch (state)
		{
		case GTK_STATE_SELECTED:
		    ret = CBS_CHECKEDPRESSED;
		    break;
		case GTK_STATE_PRELIGHT:
		    ret = CBS_CHECKEDHOT;
		    break;
		case GTK_STATE_INSENSITIVE:
		    ret = CBS_CHECKEDDISABLED;
		    break;
		default:
		    ret = CBS_CHECKEDNORMAL;
		}
	    break;

	case XP_THEME_ELEMENT_DEFAULT_BUTTON:
	    switch (state)
		{
		case GTK_STATE_ACTIVE:
		    ret = PBS_PRESSED;
		    break;
		case GTK_STATE_PRELIGHT:
		    ret = PBS_HOT;
		    break;
		case GTK_STATE_INSENSITIVE:
		    ret = PBS_DISABLED;
		    break;
		default:
		    ret = PBS_DEFAULTED;
		}
	    break;

	case XP_THEME_ELEMENT_SPIN_BUTTON_DOWN:
	    switch (state)
		{
		case GTK_STATE_ACTIVE:
		    ret = DNS_PRESSED;
		    break;
		case GTK_STATE_PRELIGHT:
		    ret = DNS_HOT;
		    break;
		case GTK_STATE_INSENSITIVE:
		    ret = DNS_DISABLED;
		    break;
		default:
		    ret = DNS_NORMAL;
		}
	    break;

	case XP_THEME_ELEMENT_SPIN_BUTTON_UP:
	    switch (state)
		{
		case GTK_STATE_ACTIVE:
		    ret = UPS_PRESSED;
		    break;
		case GTK_STATE_PRELIGHT:
		    ret = UPS_HOT;
		    break;
		case GTK_STATE_INSENSITIVE:
		    ret = UPS_DISABLED;
		    break;
		default:
		    ret = UPS_NORMAL;
		}
	    break;

	case XP_THEME_ELEMENT_TREEVIEW_EXPANDER_OPENED:
	    ret = GLPS_OPENED;
	    break;

	case XP_THEME_ELEMENT_TREEVIEW_EXPANDER_CLOSED:
	    ret = GLPS_CLOSED;
	    break;

	case XP_THEME_ELEMENT_PROGRESS_BAR_H:
	case XP_THEME_ELEMENT_PROGRESS_BAR_V:
	case XP_THEME_ELEMENT_PROGRESS_TROUGH_H:
	case XP_THEME_ELEMENT_PROGRESS_TROUGH_V:
	    ret = 1;
	    break;

	case XP_THEME_ELEMENT_MENU_ITEM:
	case XP_THEME_ELEMENT_MENU_SEPARATOR:
	    switch (state)
		{
		case GTK_STATE_SELECTED:
		    ret = MS_SELECTED;
		    break;
		case GTK_STATE_INSENSITIVE:
		    ret = MS_DEMOTED;
		    break;
		default:
		    ret = MS_NORMAL;
		}
	    break;

	case XP_THEME_ELEMENT_LINE_H:
	    switch (state)
		{
		    /* LHS_FLAT, LHS_RAISED, LHS_SUNKEN */
		    ret = LHS_RAISED;
		    break;
		}
	    break;

	case XP_THEME_ELEMENT_LINE_V:
	    switch (state)
		{
		    /* LVS_FLAT, LVS_RAISED, LVS_SUNKEN */
		    ret = LVS_RAISED;
		    break;
		}
	    break;

	case XP_THEME_ELEMENT_SCALE_TROUGH_H:
	case XP_THEME_ELEMENT_SCALE_TROUGH_V:
	    ret = TRS_NORMAL;
	    break;

	default:
	    switch (state)
		{
		case GTK_STATE_ACTIVE:
		    ret = PBS_PRESSED;
		    break;
		case GTK_STATE_PRELIGHT:
		    ret = PBS_HOT;
		    break;
		case GTK_STATE_INSENSITIVE:
		    ret = PBS_DISABLED;
		    break;
		default:
		    ret = PBS_NORMAL;
		}
	}
    return ret;
}

gboolean
xp_theme_draw (GdkWindow * win, XpThemeElement element, GtkStyle * style,
	       int x, int y, int width, int height,
	       GtkStateType state_type, GdkRectangle * area)
{
    HTHEME theme;
    RECT rect, clip, *pClip;
    int xoff, yoff;
    HDC dc;
    GdkDrawable *drawable;
    int part_state;

    if (!xp_theme_is_drawable (element))
	return FALSE;

    theme = xp_theme_get_handle_by_element (element);
    if (!theme)
	return FALSE;

    /* FIXME: Recheck its function */
    enable_theme_dialog_texture_func (GDK_WINDOW_HWND (win), ETDT_ENABLETAB);

    if (!GDK_IS_WINDOW (win))
	{
	    xoff = 0;
	    yoff = 0;
	    drawable = win;
	}
    else
	{
	    gdk_window_get_internal_paint_info (win, &drawable, &xoff, &yoff);
	}

    rect.left = x - xoff;
    rect.top = y - yoff;
    rect.right = rect.left + width;
    rect.bottom = rect.top + height;

    if (area)
	{
	    clip.left = area->x - xoff;
	    clip.top = area->y - yoff;
	    clip.right = clip.left + area->width;
	    clip.bottom = clip.top + area->height;

	    pClip = &clip;
	}
    else
	{
	    pClip = NULL;
	}

    gdk_gc_set_clip_rectangle (style->dark_gc[state_type], NULL);
    dc = gdk_win32_hdc_get (drawable, style->dark_gc[state_type], 0);
    if (!dc)
	return FALSE;

    part_state = xp_theme_map_gtk_state (element, state_type);

    draw_theme_background_func (theme, dc, element_part_map[element],
				part_state, &rect, pClip);
    gdk_win32_hdc_release (drawable, style->dark_gc[state_type], 0);

    return TRUE;
}

gboolean
xp_theme_is_active (void)
{
	return use_xp_theme;
}

gboolean
xp_theme_is_drawable (XpThemeElement element)
{
    if (xp_theme_is_active ())
	return (xp_theme_get_handle_by_element (element) != NULL);

    return FALSE;
}

gboolean
xp_theme_get_system_font (XpThemeClass klazz, XpThemeFont fontId,
			  OUT LOGFONT * lf)
{
    if (xp_theme_is_active () && get_theme_sys_font_func != NULL)
	{
	    HTHEME theme = xp_theme_get_handle_by_class (klazz);
	    int themeFont;

	    if (!theme)
		return FALSE;

	    switch (fontId)
		{
		case XP_THEME_FONT_CAPTION:
		    themeFont = TMT_CAPTIONFONT;
		    break;
		case XP_THEME_FONT_MENU:
		    themeFont = TMT_MENUFONT;
		    break;
		case XP_THEME_FONT_STATUS:
		    themeFont = TMT_STATUSFONT;
		    break;
		case XP_THEME_FONT_MESSAGE:
		default:
		    themeFont = TMT_MSGBOXFONT;
		    break;
		}
	    /* if theme is NULL, it will just return the GetSystemFont()
	       value */
	    return ((*get_theme_sys_font_func) (theme, themeFont, lf) ==
		    S_OK);
	}

    return FALSE;
}

gboolean
xp_theme_get_system_color (XpThemeClass klazz, int colorId,
			   OUT DWORD * pColor)
{
    if (xp_theme_is_active () && get_theme_sys_color_func != NULL)
	{
	    HTHEME theme = xp_theme_get_handle_by_class (klazz);

	    /* if theme is NULL, it will just return the GetSystemColor()
	       value */
	    *pColor = (*get_theme_sys_color_func) (theme, colorId);
	    return TRUE;
	}

    return FALSE;
}

gboolean
xp_theme_get_system_metric (XpThemeClass klazz, int metricId, OUT int *pVal)
{
    if (xp_theme_is_active () && get_theme_sys_metric_func != NULL)
	{
	    HTHEME theme = xp_theme_get_handle_by_class (klazz);

	    /* if theme is NULL, it will just return the GetSystemMetrics()
	       value */
	    *pVal = (*get_theme_sys_metric_func) (theme, metricId);
	    return TRUE;
	}

    return FALSE;
}