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#ifdef _MSC_VER
#define WIN32_LEAN_AND_MEAN
#endif

#include <tkWinInt.h>
#include "ttk/ttkTheme.h"

#if !defined(WM_THEMECHANGED)
#define WM_THEMECHANGED 0x031A
#endif

static LRESULT WINAPI WndProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp);

/*
* RegisterSystemColors --
* Register all known Windows system colors (as per GetSysColor) as Tk
* named colors.
*/

typedef struct {
    const char *name;
    int index;
} SystemColorEntry;

static SystemColorEntry sysColors[] = {
{ "System3dDarkShadow", COLOR_3DDKSHADOW },
{ "System3dLight", COLOR_3DLIGHT },
{ "SystemActiveBorder", COLOR_ACTIVEBORDER },
{ "SystemActiveCaption", COLOR_ACTIVECAPTION },
{ "SystemAppWorkspace", COLOR_APPWORKSPACE },
{ "SystemBackground", COLOR_BACKGROUND },
{ "SystemButtonFace", COLOR_BTNFACE },
{ "SystemButtonHighlight", COLOR_BTNHIGHLIGHT },
{ "SystemButtonShadow", COLOR_BTNSHADOW },
{ "SystemButtonText", COLOR_BTNTEXT },
{ "SystemCaptionText", COLOR_CAPTIONTEXT },
{ "SystemDisabledText", COLOR_GRAYTEXT },
{ "SystemGrayText", COLOR_GRAYTEXT },
{ "SystemHighlight", COLOR_HIGHLIGHT },
{ "SystemHighlightText", COLOR_HIGHLIGHTTEXT },
{ "SystemInactiveBorder", COLOR_INACTIVEBORDER },
{ "SystemInactiveCaption", COLOR_INACTIVECAPTION },
{ "SystemInactiveCaptionText", COLOR_INACTIVECAPTIONTEXT },
{ "SystemInfoBackground", COLOR_INFOBK },
{ "SystemInfoText", COLOR_INFOTEXT },
{ "SystemMenu", COLOR_MENU },
{ "SystemMenuText", COLOR_MENUTEXT },
{ "SystemScrollbar", COLOR_SCROLLBAR },
{ "SystemWindow", COLOR_WINDOW },
{ "SystemWindowFrame", COLOR_WINDOWFRAME },
{ "SystemWindowText", COLOR_WINDOWTEXT },
{ NULL, 0 }
};

static void RegisterSystemColors(Tcl_Interp *interp)
{
    Ttk_ResourceCache cache = Ttk_GetResourceCache(interp);
    SystemColorEntry *sysColor;

    for (sysColor = sysColors; sysColor->name; ++sysColor) {
DWORD pixel = GetSysColor(sysColor->index);
XColor colorSpec;
colorSpec.red = GetRValue(pixel) * 257;
colorSpec.green = GetGValue(pixel) * 257;
colorSpec.blue = GetBValue(pixel) * 257;
Ttk_RegisterNamedColor(cache, sysColor->name, &colorSpec);
    }
}

static HWND
CreateThemeMonitorWindow(HINSTANCE hinst, Tcl_Interp *interp)
{
    WNDCLASSEX wc;
    HWND hwnd = NULL;
    TCHAR title[32] = TEXT("TtkMonitorWindow");
    TCHAR name[32] = TEXT("TtkMonitorClass");
    
    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc = (WNDPROC)WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hinst;
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
    wc.lpszMenuName = name;
    wc.lpszClassName = name;

    if (RegisterClassEx(&wc)) {
hwnd = CreateWindow( name, title, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hinst, NULL );
SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR) interp);
ShowWindow(hwnd, SW_HIDE);
UpdateWindow(hwnd);
    }
    return hwnd;
}

static void
DestroyThemeMonitorWindow(void *clientData)
{
    HWND hwnd = (HWND)clientData;
    DestroyWindow(hwnd);
}

static LRESULT WINAPI
WndProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
{
    Tcl_Interp *interp = (Tcl_Interp *)GetWindowLongPtr(hwnd, GWLP_USERDATA);
    Ttk_Theme theme;

    switch (msg) {
    case WM_DESTROY:
break;

    case WM_SYSCOLORCHANGE:
RegisterSystemColors(interp);
break;

    case WM_THEMECHANGED:
/*
* Reset the application theme to 'xpnative' if present,
* which will in turn fall back to 'winnative' if XP theming
* is disabled.
*/

theme = Ttk_GetTheme(interp, "xpnative");
if (theme) {
Ttk_UseTheme(interp, theme);
/* @@@ What to do about errors here? */
}
break;
    }
    return DefWindowProc(hwnd, msg, wp, lp);
}

/*
* Windows-specific platform initialization:
*/

MODULE_SCOPE int TtkWinTheme_Init(Tcl_Interp *, HWND hwnd);
MODULE_SCOPE int TtkXPTheme_Init(Tcl_Interp *, HWND hwnd);

MODULE_SCOPE int Ttk_WinPlatformInit(Tcl_Interp *interp)
{
    HWND hwnd;

    hwnd = CreateThemeMonitorWindow(Tk_GetHINSTANCE(), interp);
    Ttk_RegisterCleanup(interp, (ClientData)hwnd, DestroyThemeMonitorWindow);

    TtkWinTheme_Init(interp, hwnd);
    TtkXPTheme_Init(interp, hwnd);

    return TCL_OK;
}
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