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_SetXFocus
  21  *
  22  * Set the X focus.
  23  * Explicit colormap management seems to work only with OLVWM.
  24  */
  25 void FOCUS_SetXFocus( HWND32 hwnd )
  26 {
  27     XWindowAttributes win_attr;
  28     Window win;
  29
  30     /* Only mess with the X focus if there's */
  31     /* no desktop window and no window manager. */
  32     if ((rootWindow != DefaultRootWindow(display)) || Options.managed) return;
  33
  34     if (!hwnd)  /* If setting the focus to 0, uninstall the colormap */
  35     {
  36         if (COLOR_GetSystemPaletteFlags() & COLOR_PRIVATE)
  37             TSXUninstallColormap( display, COLOR_GetColormap() );
  38         return;
  39     }
  40
  41       /* Set X focus and install colormap */
  42
  43     if (!(win = WIN_GetXWindow( hwnd ))) return;
  44     if (!TSXGetWindowAttributes( display, win, &win_attr ) ||
  45         (win_attr.map_state != IsViewable))
  46         return;  /* If window is not viewable, don't change anything */
  47
  48     TSXSetInputFocus( display, win, RevertToParent, CurrentTime );
  49     if (COLOR_GetSystemPaletteFlags() & COLOR_PRIVATE)
  50         TSXInstallColormap( display, COLOR_GetColormap() );
  51
  52     EVENT_Synchronize();
  53 }
  54
  55 /*****************************************************************
  56  *               FOCUS_SwitchFocus
  57  */
  58 void FOCUS_SwitchFocus( HWND32 hFocusFrom, HWND32 hFocusTo )
  59 {
  60     hwndFocus = hFocusTo;
  61
  62 #if 0
  63     if (hFocusFrom) SendMessage32A( hFocusFrom, WM_KILLFOCUS, hFocusTo, 0 );
  64 #else
  65     /* FIXME: must be SendMessage16() because 32A doesn't do
  66      * intertask at this time */
  67     if (hFocusFrom) SendMessage16( hFocusFrom, WM_KILLFOCUS, hFocusTo, 0 );
  68 #endif
  69     if( !hFocusTo || hFocusTo != hwndFocus )
  70         return;
  71
  72     /* According to API docs, the WM_SETFOCUS message is sent AFTER the window
  73        has received the keyboard focus. */
  74     FOCUS_SetXFocus( hFocusTo );
  75
  76 #if 0
  77     SendMessage32A( hFocusTo, WM_SETFOCUS, hFocusFrom, 0 );
  78 #else
  79     SendMessage16( hFocusTo, WM_SETFOCUS, hFocusFrom, 0 );
  80 #endif
  81 }
  82
  83
  84 /*****************************************************************
  85  *               SetFocus16   (USER.22)
  86  */
  87 HWND16 WINAPI SetFocus16( HWND16 hwnd )
  88 {
  89     return (HWND16)SetFocus32( hwnd );
  90 }
  91
  92
  93 /*****************************************************************
  94  *               SetFocus32   (USER32.481)
  95  */
  96 HWND32 WINAPI SetFocus32( HWND32 hwnd )
  97 {
  98     HWND32 hWndPrevFocus, hwndTop = hwnd;
  99     WND *wndPtr = WIN_FindWndPtr( hwnd );
 100
 101     if (wndPtr)
 102     {
 103           /* Check if we can set the focus to this window */
 104
 105         while ( (wndPtr->dwStyle & (WS_CHILD | WS_POPUP)) == WS_CHILD  )
 106         {
 107             if ( wndPtr->dwStyle & ( WS_MINIMIZE | WS_DISABLED) )
 108                  return 0;
 109             if (!(wndPtr = wndPtr->parent)) return 0;
 110             hwndTop = wndPtr->hwndSelf;
 111         }
 112
 113         if( hwnd == hwndFocus ) return hwnd;
 114
 115         /* call hooks */
 116         if( HOOK_CallHooks16( WH_CBT, HCBT_SETFOCUS, (WPARAM16)hwnd,
 117                               (LPARAM)hwndFocus) )
 118             return 0;
 119
 120         /* activate hwndTop if needed. */
 121         if (hwndTop != GetActiveWindow32())
 122         {
 123             if (!WINPOS_SetActiveWindow(hwndTop, 0, 0)) return 0;
 124
 125             if (!IsWindow32( hwnd )) return 0;  /* Abort if window destroyed */
 126         }
 127     }
 128     else if( HOOK_CallHooks16( WH_CBT, HCBT_SETFOCUS, 0, (LPARAM)hwndFocus ) )
 129              return 0;
 130
 131       /* Change focus and send messages */
 132     hWndPrevFocus = hwndFocus;
 133
 134     FOCUS_SwitchFocus( hwndFocus , hwnd );
 135
 136     return hWndPrevFocus;
 137 }
 138
 139
 140 /*****************************************************************
 141  *               GetFocus16   (USER.23)
 142  */
 143 HWND16 WINAPI GetFocus16(void)
 144 {
 145     return (HWND16)hwndFocus;
 146 }
 147
 148
 149 /*****************************************************************
 150  *               GetFocus32   (USER32.240)
 151  */
 152 HWND32 WINAPI GetFocus32(void)
 153 {
 154     return hwndFocus;
 155 }