diff options
Diffstat (limited to 'prev/comctl32_windows.c')
| -rw-r--r-- | prev/comctl32_windows.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/prev/comctl32_windows.c b/prev/comctl32_windows.c new file mode 100644 index 0000000..e9c3ba0 --- /dev/null +++ b/prev/comctl32_windows.c @@ -0,0 +1,131 @@ +// 17 july 2014 + +#include "winapi_windows.h" + +static ULONG_PTR comctlManifestCookie; +static HMODULE comctl32; + +// these are listed as WINAPI in both Microsoft's and MinGW's headers, but not on MSDN for some reason +BOOL (*WINAPI fv_SetWindowSubclass)(HWND, SUBCLASSPROC, UINT_PTR, DWORD_PTR); +BOOL (*WINAPI fv_RemoveWindowSubclass)(HWND, SUBCLASSPROC, UINT_PTR); +LRESULT (*WINAPI fv_DefSubclassProc)(HWND, UINT, WPARAM, LPARAM); + +// these are listed as WINAPI on MSDN +BOOL (*WINAPI fv__TrackMouseEvent)(LPTRACKMOUSEEVENT); + +#define wantedICCClasses ( \ + ICC_PROGRESS_CLASS | /* progress bars */ \ + ICC_TAB_CLASSES | /* tabs */ \ + ICC_LISTVIEW_CLASSES | /* table headers */ \ + ICC_UPDOWN_CLASS | /* spinboxes */ \ + 0) + +// note that this is an 8-bit character string we're writing; see the encoding clause +static const char manifest[] = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n<assembly xmlns=\"urn:schemas-microsoft-com:asm.v1\" manifestVersion=\"1.0\">\n<assemblyIdentity\n version=\"1.0.0.0\"\n processorArchitecture=\"*\"\n name=\"CompanyName.ProductName.YourApplication\"\n type=\"win32\"\n/>\n<description>Your application description here.</description>\n<dependency>\n <dependentAssembly>\n <assemblyIdentity\n type=\"win32\"\n name=\"Microsoft.Windows.Common-Controls\"\n version=\"6.0.0.0\"\n processorArchitecture=\"*\"\n publicKeyToken=\"6595b64144ccf1df\"\n language=\"*\"\n />\n </dependentAssembly>\n</dependency>\n</assembly>\n"; + +/* +Windows requires a manifest file to enable Common Controls version 6. +The only way to not require an external manifest is to synthesize the manifest ourselves. +We can use the activation context API to load it at runtime. +References: +- http://stackoverflow.com/questions/4308503/how-to-enable-visual-styles-without-a-manifest +- http://support.microsoft.com/kb/830033 +Because neither Go nor MinGW have ways to compile in resources like this (as far as I know), we have to do the work ourselves. +*/ +DWORD initCommonControls(char **errmsg) +{ + WCHAR temppath[MAX_PATH + 1]; + WCHAR filename[MAX_PATH + 1]; + HANDLE file; + DWORD nExpected, nGot; + ACTCTX actctx; + HANDLE ac; + INITCOMMONCONTROLSEX icc; + FARPROC f; + // this is listed as WINAPI in both Microsoft's and MinGW's headers, but not on MSDN for some reason + BOOL (*WINAPI ficc)(const LPINITCOMMONCONTROLSEX); + + if (GetTempPathW(MAX_PATH + 1, temppath) == 0) { + *errmsg = "error getting temporary path for writing manifest file"; + return GetLastError(); + } + if (GetTempFileNameW(temppath, L"manifest", 0, filename) == 0) { + *errmsg = "error getting temporary filename for writing manifest file"; + return GetLastError(); + } + file = CreateFileW(filename, GENERIC_WRITE, + 0, // don't share while writing + NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); + if (file == NULL) { + *errmsg = "error creating manifest file"; + return GetLastError(); + } + nExpected = (sizeof manifest / sizeof manifest[0]) - 1; // - 1 to omit the terminating null character) + SetLastError(0); // catch errorless short writes + if (WriteFile(file, manifest, nExpected, &nGot, NULL) == 0) { + *errmsg = "error writing manifest file"; + return GetLastError(); + } + if (nGot != nExpected) { + DWORD lasterr; + + lasterr = GetLastError(); + *errmsg = "short write to manifest file"; + if (lasterr == 0) + *errmsg = "short write to manifest file without error code"; + return lasterr; + } + if (CloseHandle(file) == 0) { + *errmsg = "error closing manifest file (this IS an error here because not doing so will prevent Windows from being able to use the manifest file in an activation context)"; + return GetLastError(); + } + + ZeroMemory(&actctx, sizeof (ACTCTX)); + actctx.cbSize = sizeof (ACTCTX); + actctx.dwFlags = ACTCTX_FLAG_SET_PROCESS_DEFAULT; + actctx.lpSource = filename; + ac = CreateActCtx(&actctx); + if (ac == INVALID_HANDLE_VALUE) { + *errmsg = "error creating activation context for synthesized manifest file"; + return GetLastError(); + } + if (ActivateActCtx(ac, &comctlManifestCookie) == FALSE) { + *errmsg = "error activating activation context for synthesized manifest file"; + return GetLastError(); + } + + ZeroMemory(&icc, sizeof (INITCOMMONCONTROLSEX)); + icc.dwSize = sizeof (INITCOMMONCONTROLSEX); + icc.dwICC = wantedICCClasses; + + comctl32 = LoadLibraryW(L"comctl32.dll"); + if (comctl32 == NULL) { + *errmsg = "error loading comctl32.dll"; + return GetLastError(); + } + + // GetProcAddress() only takes a multibyte string +#define LOAD(fn) f = GetProcAddress(comctl32, fn); \ + if (f == NULL) { \ + *errmsg = "error loading " fn "()"; \ + return GetLastError(); \ + } + + LOAD("InitCommonControlsEx"); + ficc = (BOOL (*WINAPI)(const LPINITCOMMONCONTROLSEX)) f; + LOAD("SetWindowSubclass"); + fv_SetWindowSubclass = (BOOL (*WINAPI)(HWND, SUBCLASSPROC, UINT_PTR, DWORD_PTR)) f; + LOAD("RemoveWindowSubclass"); + fv_RemoveWindowSubclass = (BOOL (*WINAPI)(HWND, SUBCLASSPROC, UINT_PTR)) f; + LOAD("DefSubclassProc"); + fv_DefSubclassProc = (LRESULT (*WINAPI)(HWND, UINT, WPARAM, LPARAM)) f; + LOAD("_TrackMouseEvent"); + fv__TrackMouseEvent = (HIMAGELIST (*WINAPI)(int, int, UINT, int, int)) f; + + if ((*ficc)(&icc) == FALSE) { + *errmsg = "error initializing Common Controls (comctl32.dll)"; + return GetLastError(); + } + + return 0; +} |