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 "color.h"
  14 #include "message.h"
  15 #include "options.h"
  16
  17 static HWND32 hwndFocus = 0;
  18
  19 /*****************************************************************
  20  *               FOCUS_SwitchFocus
  21  */
  22 void FOCUS_SwitchFocus( HWND32 hFocusFrom, HWND32 hFocusTo )
  23 {
  24     WND *pFocusTo = WIN_FindWndPtr( hFocusTo );
  25     hwndFocus = hFocusTo;
  26
  27 #if 0
  28     if (hFocusFrom) SendMessage32A( hFocusFrom, WM_KILLFOCUS, hFocusTo, 0 );
  29 #else
  30     /* FIXME: must be SendMessage16() because 32A doesn't do
  31      * intertask at this time */
  32     if (hFocusFrom) SendMessage16( hFocusFrom, WM_KILLFOCUS, hFocusTo, 0 );
  33 #endif
  34     if( !hFocusTo || hFocusTo != hwndFocus )
  35         return;
  36
  37     /* According to API docs, the WM_SETFOCUS message is sent AFTER the window
  38        has received the keyboard focus. */
  39
  40     pFocusTo->pDriver->pSetFocus(pFocusTo);
  41
  42 #if 0
  43     SendMessage32A( hFocusTo, WM_SETFOCUS, hFocusFrom, 0 );
  44 #else
  45     SendMessage16( hFocusTo, WM_SETFOCUS, hFocusFrom, 0 );
  46 #endif
  47 }
  48
  49
  50 /*****************************************************************
  51  *               SetFocus16   (USER.22)
  52  */
  53 HWND16 WINAPI SetFocus16( HWND16 hwnd )
  54 {
  55     return (HWND16)SetFocus32( hwnd );
  56 }
  57
  58
  59 /*****************************************************************
  60  *               SetFocus32   (USER32.481)
  61  */
  62 HWND32 WINAPI SetFocus32( HWND32 hwnd )
  63 {
  64     HWND32 hWndPrevFocus, hwndTop = hwnd;
  65     WND *wndPtr = WIN_FindWndPtr( hwnd );
  66
  67     if (wndPtr)
  68     {
  69           /* Check if we can set the focus to this window */
  70
  71         while ( (wndPtr->dwStyle & (WS_CHILD | WS_POPUP)) == WS_CHILD  )
  72         {
  73             if ( wndPtr->dwStyle & ( WS_MINIMIZE | WS_DISABLED) )
  74                  return 0;
  75             if (!(wndPtr = wndPtr->parent)) return 0;
  76             hwndTop = wndPtr->hwndSelf;
  77         }
  78
  79         if( hwnd == hwndFocus ) return hwnd;
  80
  81         /* call hooks */
  82         if( HOOK_CallHooks16( WH_CBT, HCBT_SETFOCUS, (WPARAM16)hwnd,
  83                               (LPARAM)hwndFocus) )
  84             return 0;
  85
  86         /* activate hwndTop if needed. */
  87         if (hwndTop != GetActiveWindow32())
  88         {
  89             if (!WINPOS_SetActiveWindow(hwndTop, 0, 0)) return 0;
  90
  91             if (!IsWindow32( hwnd )) return 0;  /* Abort if window destroyed */
  92         }
  93     }
  94     else if( HOOK_CallHooks16( WH_CBT, HCBT_SETFOCUS, 0, (LPARAM)hwndFocus ) )
  95              return 0;
  96
  97       /* Change focus and send messages */
  98     hWndPrevFocus = hwndFocus;
  99
 100     FOCUS_SwitchFocus( hwndFocus , hwnd );
 101
 102     return hWndPrevFocus;
 103 }
 104
 105
 106 /*****************************************************************
 107  *               GetFocus16   (USER.23)
 108  */
 109 HWND16 WINAPI GetFocus16(void)
 110 {
 111     return (HWND16)hwndFocus;
 112 }
 113
 114
 115 /*****************************************************************
 116  *               GetFocus32   (USER32.240)
 117  */
 118 HWND32 WINAPI GetFocus32(void)
 119 {
 120     return hwndFocus;
 121 }