Sweden-Number/windows/focus.c

108 lines
2.7 KiB
C

/*
* Focus functions
*
* Copyright 1993 David Metcalfe
* Copyright 1994 Alexandre Julliard
*/
static char Copyright[] = "Copyright David Metcalfe, 1993";
static char Copyright2[] = "Copyright Alexandre Julliard, 1994";
#include "win.h"
extern Colormap COLOR_WinColormap;
static HWND hWndFocus = 0;
/*****************************************************************
* FOCUS_SetXFocus
*
* Set the X focus.
*/
static void FOCUS_SetXFocus( HWND hwnd )
{
XWindowAttributes win_attr;
Window win;
/* Only mess with the X focus if there's no desktop window */
if (rootWindow != DefaultRootWindow(display)) return;
if (!hwnd) /* If setting the focus to 0, uninstall the colormap */
{
if (COLOR_WinColormap != DefaultColormapOfScreen(screen))
XUninstallColormap( display, COLOR_WinColormap );
return;
}
/* Set X focus and install colormap */
if (!(win = WIN_GetXWindow( hwnd ))) return;
if (!XGetWindowAttributes( display, win, &win_attr ) ||
(win_attr.map_state != IsViewable))
return; /* If window is not viewable, don't change anything */
XSetInputFocus( display, win, RevertToParent, CurrentTime );
if (COLOR_WinColormap != DefaultColormapOfScreen(screen))
XInstallColormap( display, COLOR_WinColormap );
}
/*****************************************************************
* SetFocus (USER.22)
*/
HWND SetFocus(HWND hwnd)
{
HWND hWndPrevFocus, hwndParent;
WND *wndPtr;
if (hwnd == hWndFocus) return hWndFocus; /* Nothing to do! */
if (hwnd)
{
/* Check if we can set the focus to this window */
hwndParent = hwnd;
while ((wndPtr = WIN_FindWndPtr( hwndParent )) != NULL)
{
if ((wndPtr->dwStyle & WS_MINIMIZE) ||
(wndPtr->dwStyle & WS_DISABLED)) return 0;
if (!(wndPtr->dwStyle & WS_CHILD)) break;
hwndParent = wndPtr->hwndParent;
}
/* Now hwndParent is the top-level ancestor. Activate it. */
if (hwndParent != GetActiveWindow())
{
SetWindowPos( hwndParent, HWND_TOP, 0, 0, 0, 0,
SWP_NOSIZE | SWP_NOMOVE );
if (!IsWindow( hwnd )) return 0; /* Abort if window destroyed */
}
}
/* Change focus and send messages */
hWndPrevFocus = hWndFocus;
hWndFocus = hwnd;
if (hWndPrevFocus) SendMessage( hWndPrevFocus, WM_KILLFOCUS, hwnd, 0 );
if (hwnd == hWndFocus) /* Maybe already changed during WM_KILLFOCUS */
{
if (hwnd) SendMessage( hWndFocus, WM_SETFOCUS, hWndPrevFocus, 0 );
FOCUS_SetXFocus( hwnd );
}
return hWndPrevFocus;
}
/*****************************************************************
* GetFocus (USER.23)
*/
HWND GetFocus(void)
{
return hWndFocus;
}