topic Re: ESC SHORTCUT FOR EXIT/CLOSE in Software Archive

ESC SHORTCUT FOR EXIT/CLOSE

wkramer — Sun, 10 Dec 2000 06:12:18 GMT

Hello,

I would like to use the ESC-key as shortcut for closing a SDI application with a single edit control in the client area (the application is a simple text editor).
I have tried to use WM_KEYDOWN and WM_CHAR messages, but it seems that these messages are never send. Any key pressed generates a WM_COMMAND message. Even when focus is on the menu and I press a key, the WM_KEYDOWN message is still not send.
Am I missing something here?

Walter Kramer

Re: ESC SHORTCUT FOR EXIT/CLOSE

wkramer — Sun, 10 Dec 2000 19:22:18 GMT

I guess my question is not a Fortran question. I should have looked at MSDN first. WM_KEYDOWN and WM_CHAR messages are passed to the control not to the application's windows procedure.
An article on using a message filter to detect F1 keystrokes requesting context sensitive help in a dialog box ID: Q72219 discusses this issue.
It is apparently not as easy as I hoped.

Walter Kramer

P.S.

Great improvement to have the forum sorted by date.

Re: ESC SHORTCUT FOR EXIT/CLOSE

wkramer — Tue, 12 Dec 2000 09:52:16 GMT

Hello,

I managed to get things working using:

 
  case (WM_CREATE) 
    !// Create the edit control child window 
    lParam=ghInstance 
   ghHook=SetWindowsHookEX(WH_KEYBOARD, LOC(EscKeyProc), ghInstance, GetCurrentThreadID())                         
    hwndEdit = CreateWindowEx(0,"edit"C,  & 
                            ""C,      & 
                            IOR(WS_CHILD, IOR(WS_VISIBLE,                & 
                            IOR(WS_HSCROLL, IOR(WS_VSCROLL,              & 
                            IOR(WS_BORDER, IOR(ES_LEFT,                  & 
                            IOR(ES_MULTILINE, IOR(ES_NOHIDESEL,          & 
                            IOR(ES_AUTOHSCROLL, IOR(ES_READONLY,         & 
                                ES_AUTOVSCROLL)))))))))), & 
                            0, 0, 0, 0, & 
                            hwnd, EDITID, ghInstance, NULL) 
    ghwndEdit=hwndEdit 
    hBrushEdit = CreateSolidBrush(GetSysColor(COLOR_BTNHIGHLIGHT)) 
    iret=SendMessage(hwndEdit,EM_LIMITTEXT,32000,0)

The hook procedure is:

 
integer*4 function EscKeyProc(nCode, wParam, lParam)  
  !DEC$ IF DEFINED (_X86_) 
    !DEC$ ATTRIBUTES STDCALL, ALIAS: '_EscKeyProc@12' :: EscKeyProc 
  !DEC$ ELSE 
    !DEC$ ATTRIBUTES STDCALL, ALIAS: '_EscKeyProc' :: EscKeyProc 
  !DEC$ ENDIF  
  use NemListGlobals 
  use Dfwbase 
  integer*4, intent(in) ::  nCode   ! hook code  
  integer*4, intent(in) ::  wParam  ! virtual-key code  
  integer*4, intent(in) ::  lParam  ! keystroke message information 
  integer*4 hwnd 
  integer*4 iret 
  hwnd=getFocus() 
  iret=HIWORD(lParam) 
  if ((nCode==HC_ACTION).AND.(wParam==VK_ESCAPE).AND.(hwnd==ghwndEdit).AND. & 
  (IAND(KF_MENUMODE,iret)==0)) then 
    iret=PostMessage(getParent(hwnd), WM_CLOSE, 0, 0) 
    EscKeyProc = 1 ! non zero to stop further processing   
    return 
  endif 
  EscKeyProc = CallNextHookEx(ghHook, nCode, wParam, loc(lParam)) 
  return 
end function EscKeyProc

IAND(KF_MENUMODE,iret)==0 makes sure that the ESCAPE key doesn't
function as shortcut for EXIT while the menu is active.

Remains one question.

If the menu is active and I press ESC the pull down closes, but optically it seems that the menu is still active (blue color or shadow).

How can I trap this state? I would like that ESC will not work as shortcut for EXIT under these circumstances either.

Thanks,

Walter Kramer