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#include<khmapp.h>
static ATOM sAtom = 0;
static HINSTANCE shInstance = 0;
/* Callback for the MITPasswordControl
This is a replacement for the normal edit control. It does not show the
annoying password char in the edit box so that the number of chars in the
password are not known.
*/
#define PASSWORDCHAR L'#'
#define DLGHT(ht) (HIWORD(GetDialogBaseUnits())*(ht)/8)
#define DLGWD(wd) (LOWORD(GetDialogBaseUnits())*(wd)/4)
static
LRESULT
CALLBACK
MITPasswordEditProc(
HWND hWnd,
UINT message,
WPARAM wParam,
LPARAM lParam
)
{
static SIZE pwdcharsz;
BOOL pass_the_buck = FALSE;
if (message > WM_USER && message < 0x7FFF)
pass_the_buck = TRUE;
switch(message)
{
case WM_GETTEXT:
case WM_GETTEXTLENGTH:
case WM_SETTEXT:
pass_the_buck = TRUE;
break;
case WM_PAINT:
{
HDC hdc;
PAINTSTRUCT ps;
RECT r;
hdc = BeginPaint(hWnd, &ps);
GetClientRect(hWnd, &r);
Rectangle(hdc, 0, 0, r.right, r.bottom);
EndPaint(hWnd, &ps);
}
break;
case WM_SIZE:
{
MoveWindow(GetDlgItem(hWnd, 1), DLGWD(2), DLGHT(2),
pwdcharsz.cx / 2, pwdcharsz.cy, TRUE);
}
break;
case WM_LBUTTONDOWN:
case WM_SETFOCUS:
{
SetFocus(GetDlgItem(hWnd, 1));
}
break;
case WM_CREATE:
{
HWND heditchild;
wchar_t pwdchar = PASSWORDCHAR;
HDC hdc;
/* Create a child window of this control for default processing. */
hdc = GetDC(hWnd);
GetTextExtentPoint32(hdc, &pwdchar, 1, &pwdcharsz);
ReleaseDC(hWnd, hdc);
heditchild =
CreateWindow(L"edit", L"", WS_CHILD | WS_VISIBLE | ES_AUTOHSCROLL |
ES_LEFT | ES_PASSWORD | WS_TABSTOP,
0, 0, 0, 0,
hWnd,
(HMENU)1,
((LPCREATESTRUCT)lParam)->hInstance,
NULL);
SendMessage(heditchild, EM_SETPASSWORDCHAR, PASSWORDCHAR, 0L);
}
break;
}
if (pass_the_buck)
return SendMessage(GetDlgItem(hWnd, 1), message, wParam, lParam);
return DefWindowProc(hWnd, message, wParam, lParam);
}
khm_int32
khm_register_passwnd_class(void)
{
if (!sAtom) {
WNDCLASS wndclass;
memset(&wndclass, 0, sizeof(WNDCLASS));
shInstance = khm_hInstance;
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = (WNDPROC)MITPasswordEditProc;
wndclass.cbClsExtra = sizeof(HWND);
wndclass.cbWndExtra = 0;
wndclass.hInstance = shInstance;
wndclass.hbrBackground = (void *)(COLOR_WINDOW + 1);
wndclass.lpszClassName = MIT_PWD_DLL_CLASS;
wndclass.hCursor = LoadCursor((HINSTANCE)NULL, IDC_IBEAM);
sAtom = RegisterClass(&wndclass);
}
return (sAtom)?KHM_ERROR_SUCCESS:KHM_ERROR_UNKNOWN;
}
khm_int32
khm_unregister_passwnd_class(void)
{
BOOL result = TRUE;
if ((khm_hInstance != shInstance) || !sAtom) {
return KHM_ERROR_INVALID_OPERATION;
}
result = UnregisterClass(MIT_PWD_DLL_CLASS, khm_hInstance);
if (result) {
sAtom = 0;
shInstance = 0;
return KHM_ERROR_SUCCESS;
} else {
return KHM_ERROR_UNKNOWN;
}
}
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