Sweden-Number/windows/focus.c

180 lines
5.3 KiB
C

/*
* Focus functions
*
* Copyright 1993 David Metcalfe
* 1994 Alexandre Julliard
* 1995 Alex Korobka
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "windef.h"
#include "wingdi.h"
#include "wine/winuser16.h"
#include "win.h"
#include "winpos.h"
#include "hook.h"
#include "message.h"
#include "queue.h"
#include "user.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(win);
/*****************************************************************
* FOCUS_SwitchFocus
* pMsgQ is the queue whose perQData focus is to be modified
*/
void FOCUS_SwitchFocus( MESSAGEQUEUE *pMsgQ, HWND hFocusFrom, HWND hFocusTo )
{
PERQDATA_SetFocusWnd( pMsgQ->pQData, hFocusTo );
if (hFocusFrom) SendMessageA( hFocusFrom, WM_KILLFOCUS, (WPARAM)hFocusTo, 0 );
if( !hFocusTo || hFocusTo != PERQDATA_GetFocusWnd( pMsgQ->pQData ) )
{
return;
}
/* According to API docs, the WM_SETFOCUS message is sent AFTER the window
has received the keyboard focus. */
if (USER_Driver.pSetFocus) USER_Driver.pSetFocus(hFocusTo);
SendMessageA( hFocusTo, WM_SETFOCUS, (WPARAM)hFocusFrom, 0 );
}
/*****************************************************************
* SetFocus (USER32.@)
*/
HWND WINAPI SetFocus( HWND hwnd )
{
HWND hWndFocus = 0, hwndTop = hwnd;
MESSAGEQUEUE *pMsgQ = 0, *pCurMsgQ = 0;
BOOL bRet = 0;
/* Get the messageQ for the current thread */
if (!(pCurMsgQ = QUEUE_Current()))
{
WARN("\tCurrent message queue not found. Exiting!\n" );
return 0;
}
if (hwnd)
{
/* Check if we can set the focus to this window */
WND *wndPtr;
hwnd = WIN_GetFullHandle( hwnd );
for (;;)
{
HWND parent;
LONG style = GetWindowLongW( hwndTop, GWL_STYLE );
if (style & (WS_MINIMIZE | WS_DISABLED)) return 0;
parent = GetAncestor( hwndTop, GA_PARENT );
if (!parent || parent == GetDesktopWindow()) break;
hwndTop = parent;
}
if (!(wndPtr = WIN_FindWndPtr( hwndTop ))) return 0;
/* Retrieve the message queue associated with this window */
pMsgQ = (MESSAGEQUEUE *)QUEUE_Lock( wndPtr->hmemTaskQ );
WIN_ReleaseWndPtr( wndPtr );
if ( !pMsgQ )
{
WARN("\tMessage queue not found. Exiting!\n" );
return 0;
}
/* Make sure that message queue for the window we are setting focus to
* shares the same perQ data as the current threads message queue.
* In other words you can't set focus to a window owned by a different
* thread unless AttachThreadInput has been called previously.
* (see AttachThreadInput and SetFocus docs)
*/
if ( pCurMsgQ->pQData != pMsgQ->pQData )
goto CLEANUP;
/* Get the current focus window from the perQ data */
hWndFocus = PERQDATA_GetFocusWnd( pMsgQ->pQData );
if( hwnd == hWndFocus )
{
bRet = 1; /* Success */
goto CLEANUP; /* Nothing to do */
}
/* call hooks */
if( HOOK_CallHooksA( WH_CBT, HCBT_SETFOCUS, (WPARAM)hwnd, (LPARAM)hWndFocus) )
goto CLEANUP;
/* activate hwndTop if needed. */
if (hwndTop != GetActiveWindow())
{
if (!WINPOS_SetActiveWindow(hwndTop, 0, 0)) goto CLEANUP;
if (!IsWindow( hwnd )) goto CLEANUP; /* Abort if window destroyed */
}
/* Get the current focus window from the perQ data */
hWndFocus = PERQDATA_GetFocusWnd( pMsgQ->pQData );
/* Change focus and send messages */
FOCUS_SwitchFocus( pMsgQ, hWndFocus, hwnd );
}
else /* NULL hwnd passed in */
{
if( HOOK_CallHooksA( WH_CBT, HCBT_SETFOCUS, 0, (LPARAM)hWndFocus ) )
return 0;
/* Get the current focus from the perQ data of the current message Q */
hWndFocus = PERQDATA_GetFocusWnd( pCurMsgQ->pQData );
/* Change focus and send messages */
FOCUS_SwitchFocus( pCurMsgQ, hWndFocus, hwnd );
}
bRet = 1; /* Success */
CLEANUP:
/* Unlock the queues before returning */
if ( pMsgQ )
QUEUE_Unlock( pMsgQ );
return bRet ? hWndFocus : 0;
}
/*****************************************************************
* GetFocus (USER32.@)
*/
HWND WINAPI GetFocus(void)
{
MESSAGEQUEUE *pCurMsgQ = 0;
/* Get the messageQ for the current thread */
if (!(pCurMsgQ = QUEUE_Current()))
{
WARN("\tCurrent message queue not found. Exiting!\n" );
return 0;
}
/* Get the current focus from the perQ data of the current message Q */
return PERQDATA_GetFocusWnd( pCurMsgQ->pQData );
}