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 #define NO_TRANSITION_TYPES  /* This file is Win32-clean */
  11 #include "win.h"
  12 #include "winpos.h"
  13 #include "hook.h"
  14 #include "color.h"
  15 #include "message.h"
  16 #include "options.h"
  17
  18 static HWND32 hwndFocus = 0;
  19
  20 /*****************************************************************
  21  *               FOCUS_SetXFocus
  22  *
  23  * Set the X focus.
  24  * Explicit colormap management seems to work only with OLVWM.
  25  */
  26 void FOCUS_SetXFocus( HWND32 hwnd )
  27 {
  28     XWindowAttributes win_attr;
  29     Window win;
  30
  31     /* Only mess with the X focus if there's */
  32     /* no desktop window and no window manager. */
  33     if ((rootWindow != DefaultRootWindow(display)) || Options.managed) return;
  34
  35     if (!hwnd)  /* If setting the focus to 0, uninstall the colormap */
  36     {
  37         if (COLOR_GetSystemPaletteFlags() & COLOR_PRIVATE)
  38             XUninstallColormap( display, COLOR_GetColormap() );
  39         return;
  40     }
  41
  42       /* Set X focus and install colormap */
  43
  44     if (!(win = WIN_GetXWindow( hwnd ))) return;
  45     if (!XGetWindowAttributes( display, win, &win_attr ) ||
  46         (win_attr.map_state != IsViewable))
  47         return;  /* If window is not viewable, don't change anything */
  48
  49     XSetInputFocus( display, win, RevertToParent, CurrentTime );
  50     if (COLOR_GetSystemPaletteFlags() & COLOR_PRIVATE)
  51         XInstallColormap( display, COLOR_GetColormap() );
  52
  53     EVENT_Synchronize();
  54 }
  55
  56 /*****************************************************************
  57  *               FOCUS_SwitchFocus
  58  */
  59 void FOCUS_SwitchFocus( HWND32 hFocusFrom, HWND32 hFocusTo )
  60 {
  61     hwndFocus = hFocusTo;
  62
  63     if (hFocusFrom) SendMessage32A( hFocusFrom, WM_KILLFOCUS, hFocusTo, 0 );
  64     if( !hFocusTo || hFocusTo != hwndFocus )
  65         return;
  66
  67     SendMessage32A( hFocusTo, WM_SETFOCUS, hFocusFrom, 0 );
  68     FOCUS_SetXFocus( hFocusTo );
  69 }
  70
  71
  72 /*****************************************************************
  73  *               SetFocus16   (USER.22)
  74  */
  75 HWND16 SetFocus16( HWND16 hwnd )
  76 {
  77     return (HWND16)SetFocus32( hwnd );
  78 }
  79
  80
  81 /*****************************************************************
  82  *               SetFocus32   (USER32.480)
  83  */
  84 HWND32 SetFocus32( HWND32 hwnd )
  85 {
  86     HWND32 hWndPrevFocus, hwndTop = hwnd;
  87     WND *wndPtr = WIN_FindWndPtr( hwnd );
  88
  89     if (wndPtr)
  90     {
  91           /* Check if we can set the focus to this window */
  92
  93         while ( (wndPtr->dwStyle & (WS_CHILD | WS_POPUP)) == WS_CHILD  )
  94         {
  95             if ( wndPtr->dwStyle & ( WS_MINIMIZE | WS_DISABLED) )
  96                  return 0;
  97             if (!(wndPtr = wndPtr->parent)) return 0;
  98             hwndTop = wndPtr->hwndSelf;
  99         }
 100
 101         if( hwnd == hwndFocus ) return hwnd;
 102
 103         /* call hooks */
 104         if( HOOK_CallHooks16( WH_CBT, HCBT_SETFOCUS, (WPARAM16)hwnd,
 105                               (LPARAM)hwndFocus) )
 106             return 0;
 107
 108         /* activate hwndTop if needed. */
 109         if (hwndTop != GetActiveWindow())
 110         {
 111             if (!WINPOS_SetActiveWindow(hwndTop, 0, 0)) return 0;
 112
 113             if (!IsWindow( hwnd )) return 0;  /* Abort if window destroyed */
 114         }
 115     }
 116     else if( HOOK_CallHooks16( WH_CBT, HCBT_SETFOCUS, 0, (LPARAM)hwndFocus ) )
 117              return 0;
 118
 119       /* Change focus and send messages */
 120     hWndPrevFocus = hwndFocus;
 121
 122     FOCUS_SwitchFocus( hwndFocus , hwnd );
 123
 124     return hWndPrevFocus;
 125 }
 126
 127
 128 /*****************************************************************
 129  *               GetFocus16   (USER.23)
 130  */
 131 HWND16 GetFocus16(void)
 132 {
 133     return (HWND16)hwndFocus;
 134 }
 135
 136
 137 /*****************************************************************
 138  *               GetFocus32   (USER32.239)
 139  */
 140 HWND32 GetFocus32(void)
 141 {
 142     return hwndFocus;
 143 }