Pimpl (SystemTrayIconComponent& owner_, HICON hicon, HWND hwnd)
: owner (owner_),
originalWndProc ((WNDPROC) GetWindowLongPtr (hwnd, GWLP_WNDPROC)),
taskbarCreatedMessage (RegisterWindowMessage (TEXT ("TaskbarCreated")))
{
SetWindowLongPtr (hwnd, GWLP_WNDPROC, (LONG_PTR) hookedWndProc);
zerostruct (iconData);
iconData.cbSize = sizeof (iconData);
iconData.hWnd = hwnd;
iconData.uID = (UINT) (pointer_sized_int) hwnd;
iconData.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
iconData.uCallbackMessage = WM_TRAYNOTIFY;
iconData.hIcon = hicon;
notify (NIM_ADD);
// In order to receive the "TaskbarCreated" message, we need to request that it's not filtered out.
// (Need to load dynamically, as ChangeWindowMessageFilter is only available in Vista and later)
typedef BOOL (WINAPI* ChangeWindowMessageFilterType) (UINT, DWORD);
if (ChangeWindowMessageFilterType changeWindowMessageFilter
= (ChangeWindowMessageFilterType) getUser32Function ("ChangeWindowMessageFilter"))
changeWindowMessageFilter (taskbarCreatedMessage, 1 /* MSGFLT_ADD */);
}
/**
* Helper function that will allow us to receive some broadcast messages on Vista
* (We need to bypass that filter if we run as Administrator, but the orginating process
* has less priviledges)
*/
static void AdjustMessageFilters(UINT filter)
{
HMODULE user32 = LoadLibraryW(L"user32.dll");
if (user32 != 0) {
pChangeWindowMessageFilter changeWindowMessageFilter =
reinterpret_cast<pChangeWindowMessageFilter>(GetProcAddress(
user32,
"ChangeWindowMessageFilter"
));
if (changeWindowMessageFilter != 0) {
changeWindowMessageFilter(WM_TASKBARCREATED, filter);
}
FreeLibrary(user32);
}
}
