windows/focus.c

   1 /*
   2  * Focus functions
   3  *
   4  * Copyright 1993 David Metcalfe
   5  *           1994 Alexandre Julliard
   6  *           1995 Alex Korobka
   7  *
   8  */
   9
  10 #include "win.h"
  11 #include "winpos.h"
  12 #include "hook.h"
  13 #include "message.h"
  14
  15 static HWND32 hwndFocus = 0;
  16
  17 /*****************************************************************
  18  *               FOCUS_SwitchFocus
  19  */
  20 void FOCUS_SwitchFocus( HWND32 hFocusFrom, HWND32 hFocusTo )
  21 {
  22     WND *pFocusTo = WIN_FindWndPtr( hFocusTo );
  23     hwndFocus = hFocusTo;
  24
  25 #if 0
  26     if (hFocusFrom) SendMessage32A( hFocusFrom, WM_KILLFOCUS, hFocusTo, 0 );
  27 #else
  28     /* FIXME: must be SendMessage16() because 32A doesn't do
  29      * intertask at this time */
  30     if (hFocusFrom) SendMessage16( hFocusFrom, WM_KILLFOCUS, hFocusTo, 0 );
  31 #endif
  32     if( !pFocusTo || hFocusTo != hwndFocus )
  33         return;
  34
  35     /* According to API docs, the WM_SETFOCUS message is sent AFTER the window
  36        has received the keyboard focus. */
  37
  38     pFocusTo->pDriver->pSetFocus(pFocusTo);
  39
  40 #if 0
  41     SendMessage32A( hFocusTo, WM_SETFOCUS, hFocusFrom, 0 );
  42 #else
  43     SendMessage16( hFocusTo, WM_SETFOCUS, hFocusFrom, 0 );
  44 #endif
  45 }
  46
  47
  48 /*****************************************************************
  49  *               SetFocus16   (USER.22)
  50  */
  51 HWND16 WINAPI SetFocus16( HWND16 hwnd )
  52 {
  53     return (HWND16)SetFocus32( hwnd );
  54 }
  55
  56
  57 /*****************************************************************
  58  *               SetFocus32   (USER32.481)
  59  */
  60 HWND32 WINAPI SetFocus32( HWND32 hwnd )
  61 {
  62     HWND32 hWndPrevFocus, hwndTop = hwnd;
  63     WND *wndPtr = WIN_FindWndPtr( hwnd );
  64
  65     if (wndPtr)
  66     {
  67           /* Check if we can set the focus to this window */
  68
  69         while ( (wndPtr->dwStyle & (WS_CHILD | WS_POPUP)) == WS_CHILD  )
  70         {
  71             if ( wndPtr->dwStyle & ( WS_MINIMIZE | WS_DISABLED) )
  72                  return 0;
  73             if (!(wndPtr = wndPtr->parent)) return 0;
  74             hwndTop = wndPtr->hwndSelf;
  75         }
  76
  77         if( hwnd == hwndFocus ) return hwnd;
  78
  79         /* call hooks */
  80         if( HOOK_CallHooks16( WH_CBT, HCBT_SETFOCUS, (WPARAM16)hwnd,
  81                               (LPARAM)hwndFocus) )
  82             return 0;
  83
  84         /* activate hwndTop if needed. */
  85         if (hwndTop != GetActiveWindow32())
  86         {
  87             if (!WINPOS_SetActiveWindow(hwndTop, 0, 0)) return 0;
  88
  89             if (!IsWindow32( hwnd )) return 0;  /* Abort if window destroyed */
  90         }
  91     }
  92     else if( HOOK_CallHooks16( WH_CBT, HCBT_SETFOCUS, 0, (LPARAM)hwndFocus ) )
  93              return 0;
  94
  95       /* Change focus and send messages */
  96     hWndPrevFocus = hwndFocus;
  97
  98     FOCUS_SwitchFocus( hwndFocus , hwnd );
  99
 100     return hWndPrevFocus;
 101 }
 102
 103
 104 /*****************************************************************
 105  *               GetFocus16   (USER.23)
 106  */
 107 HWND16 WINAPI GetFocus16(void)
 108 {
 109     return (HWND16)hwndFocus;
 110 }
 111
 112
 113 /*****************************************************************
 114  *               GetFocus32   (USER32.240)
 115  */
 116 HWND32 WINAPI GetFocus32(void)
 117 {
 118     return hwndFocus;
 119 }