dlls/user32/defdlg.c

   1 /*
   2  * Default dialog procedure
   3  *
   4  * Copyright 1993, 1996 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "wingdi.h"
  26 #include "winuser.h"
  27 #include "controls.h"
  28 #include "win.h"
  29 #include "user_private.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(dialog);
  33
  34
  35 /***********************************************************************
  36  *           DEFDLG_GetDlgProc
  37  */
  38 static DLGPROC DEFDLG_GetDlgProc( HWND hwnd )
  39 {
  40     DLGPROC ret;
  41     WND *wndPtr = WIN_GetPtr( hwnd );
  42
  43     if (!wndPtr) return 0;
  44     if (wndPtr == WND_OTHER_PROCESS)
  45     {
  46         ERR( "cannot get dlg proc %p from other process\n", hwnd );
  47         return 0;
  48     }
  49     ret = *(DLGPROC *)((char *)wndPtr->wExtra + DWLP_DLGPROC);
  50     WIN_ReleasePtr( wndPtr );
  51     return ret;
  52 }
  53
  54 /***********************************************************************
  55  *           DEFDLG_SetFocus
  56  *
  57  * Set the focus to a control of the dialog, selecting the text if
  58  * the control is an edit dialog that has DLGC_HASSETSEL.
  59  */
  60 static void DEFDLG_SetFocus( HWND hwndCtrl )
  61 {
  62     if (SendMessageW( hwndCtrl, WM_GETDLGCODE, 0, 0 ) & DLGC_HASSETSEL)
  63         SendMessageW( hwndCtrl, EM_SETSEL, 0, -1 );
  64     SetFocus( hwndCtrl );
  65 }
  66
  67
  68 /***********************************************************************
  69  *           DEFDLG_SaveFocus
  70  */
  71 static void DEFDLG_SaveFocus( HWND hwnd )
  72 {
  73     DIALOGINFO *infoPtr;
  74     HWND hwndFocus = GetFocus();
  75
  76     if (!hwndFocus || !IsChild( hwnd, hwndFocus )) return;
  77     if (!(infoPtr = DIALOG_get_info( hwnd, FALSE ))) return;
  78     infoPtr->hwndFocus = hwndFocus;
  79     /* Remove default button */
  80 }
  81
  82
  83 /***********************************************************************
  84  *           DEFDLG_RestoreFocus
  85  */
  86 static void DEFDLG_RestoreFocus( HWND hwnd, BOOL justActivate )
  87 {
  88     DIALOGINFO *infoPtr;
  89
  90     if (IsIconic( hwnd )) return;
  91     if (!(infoPtr = DIALOG_get_info( hwnd, FALSE ))) return;
  92     /* Don't set the focus back to controls if EndDialog is already called.*/
  93     if (infoPtr->flags & DF_END) return;
  94     if (!IsWindow(infoPtr->hwndFocus) || infoPtr->hwndFocus == hwnd) {
  95         if (justActivate) return;
  96         /* If no saved focus control exists, set focus to the first visible,
  97            non-disabled, WS_TABSTOP control in the dialog */
  98         infoPtr->hwndFocus = GetNextDlgTabItem( hwnd, 0, FALSE );
  99         /* If there are no WS_TABSTOP controls, set focus to the first visible,
 100            non-disabled control in the dialog */
 101         if (!infoPtr->hwndFocus) infoPtr->hwndFocus = GetNextDlgGroupItem( hwnd, 0, FALSE );
 102         if (!IsWindow( infoPtr->hwndFocus )) return;
 103     }
 104     if (justActivate)
 105         SetFocus( infoPtr->hwndFocus );
 106     else
 107         DEFDLG_SetFocus( infoPtr->hwndFocus );
 108
 109     /* This used to set infoPtr->hwndFocus to NULL for no apparent reason,
 110        sometimes losing focus when receiving WM_SETFOCUS messages. */
 111 }
 112
 113
 114 /***********************************************************************
 115  *           DEFDLG_FindDefButton
 116  *
 117  * Find the current default push-button.
 118  */
 119 static HWND DEFDLG_FindDefButton( HWND hwndDlg )
 120 {
 121     HWND hwndChild, hwndTmp;
 122
 123     hwndChild = GetWindow( hwndDlg, GW_CHILD );
 124     while (hwndChild)
 125     {
 126         if (SendMessageW( hwndChild, WM_GETDLGCODE, 0, 0 ) & DLGC_DEFPUSHBUTTON)
 127             break;
 128
 129         /* Recurse into WS_EX_CONTROLPARENT controls */
 130         if (GetWindowLongW( hwndChild, GWL_EXSTYLE ) & WS_EX_CONTROLPARENT)
 131         {
 132             LONG dsStyle = GetWindowLongW( hwndChild, GWL_STYLE );
 133             if ((dsStyle & WS_VISIBLE) && !(dsStyle & WS_DISABLED) &&
 134                 (hwndTmp = DEFDLG_FindDefButton(hwndChild)) != NULL)
 135            return hwndTmp;
 136         }
 137         hwndChild = GetWindow( hwndChild, GW_HWNDNEXT );
 138     }
 139     return hwndChild;
 140 }
 141
 142
 143 /***********************************************************************
 144  *           DEFDLG_SetDefId
 145  *
 146  * Set the default button id.
 147  */
 148 static BOOL DEFDLG_SetDefId( HWND hwndDlg, DIALOGINFO *dlgInfo, WPARAM wParam)
 149 {
 150     DWORD dlgcode=0; /* initialize just to avoid a warning */
 151     HWND hwndOld, hwndNew = GetDlgItem(hwndDlg, wParam);
 152     INT old_id = dlgInfo->idResult;
 153
 154     dlgInfo->idResult = wParam;
 155     if (hwndNew &&
 156         !((dlgcode=SendMessageW(hwndNew, WM_GETDLGCODE, 0, 0 ))
 157             & (DLGC_UNDEFPUSHBUTTON | DLGC_BUTTON)))
 158         return FALSE;  /* Destination is not a push button */
 159
 160     /* Make sure the old default control is a valid push button ID */
 161     hwndOld = GetDlgItem( hwndDlg, old_id );
 162     if (!hwndOld || !(SendMessageW( hwndOld, WM_GETDLGCODE, 0, 0) & DLGC_DEFPUSHBUTTON))
 163         hwndOld = DEFDLG_FindDefButton( hwndDlg );
 164     if (hwndOld && hwndOld != hwndNew)
 165         SendMessageW( hwndOld, BM_SETSTYLE, BS_PUSHBUTTON, TRUE );
 166
 167     if (hwndNew)
 168     {
 169         if(dlgcode & DLGC_UNDEFPUSHBUTTON)
 170             SendMessageW( hwndNew, BM_SETSTYLE, BS_DEFPUSHBUTTON, TRUE );
 171     }
 172     return TRUE;
 173 }
 174
 175
 176 /***********************************************************************
 177  *           DEFDLG_SetDefButton
 178  *
 179  * Set the new default button to be hwndNew.
 180  */
 181 static BOOL DEFDLG_SetDefButton( HWND hwndDlg, DIALOGINFO *dlgInfo, HWND hwndNew )
 182 {
 183     DWORD dlgcode=0; /* initialize just to avoid a warning */
 184     HWND hwndOld = GetDlgItem( hwndDlg, dlgInfo->idResult );
 185
 186     if (hwndNew &&
 187         !((dlgcode=SendMessageW(hwndNew, WM_GETDLGCODE, 0, 0 ))
 188             & (DLGC_UNDEFPUSHBUTTON | DLGC_DEFPUSHBUTTON)))
 189     {
 190         /**
 191          * Need to draw only default push button rectangle.
 192          * Since the next control is not a push button, need to draw the push
 193          * button rectangle for the default control.
 194          */
 195         hwndNew = hwndOld;
 196         dlgcode = SendMessageW(hwndNew, WM_GETDLGCODE, 0, 0 );
 197     }
 198
 199     /* Make sure the old default control is a valid push button ID */
 200     if (!hwndOld || !(SendMessageW( hwndOld, WM_GETDLGCODE, 0, 0) & DLGC_DEFPUSHBUTTON))
 201         hwndOld = DEFDLG_FindDefButton( hwndDlg );
 202     if (hwndOld && hwndOld != hwndNew)
 203         SendMessageW( hwndOld, BM_SETSTYLE, BS_PUSHBUTTON, TRUE );
 204
 205     if (hwndNew)
 206     {
 207         if(dlgcode & DLGC_UNDEFPUSHBUTTON)
 208             SendMessageW( hwndNew, BM_SETSTYLE, BS_DEFPUSHBUTTON, TRUE );
 209     }
 210     return TRUE;
 211 }
 212
 213
 214 /***********************************************************************
 215  *           DEFDLG_Proc
 216  *
 217  * Implementation of DefDlgProc(). Only handle messages that need special
 218  * handling for dialogs.
 219  */
 220 static LRESULT DEFDLG_Proc( HWND hwnd, UINT msg, WPARAM wParam,
 221                             LPARAM lParam, DIALOGINFO *dlgInfo )
 222 {
 223     switch(msg)
 224     {
 225         case WM_ERASEBKGND:
 226         {
 227             HBRUSH brush = (HBRUSH)SendMessageW( hwnd, WM_CTLCOLORDLG, wParam, (LPARAM)hwnd );
 228             if (!brush) brush = (HBRUSH)DefWindowProcW( hwnd, WM_CTLCOLORDLG, wParam, (LPARAM)hwnd );
 229             if (brush)
 230             {
 231                 RECT rect;
 232                 HDC hdc = (HDC)wParam;
 233                 GetClientRect( hwnd, &rect );
 234                 DPtoLP( hdc, (LPPOINT)&rect, 2 );
 235                 FillRect( hdc, &rect, brush );
 236             }
 237             return 1;
 238         }
 239         case WM_NCDESTROY:
 240             if (dlgInfo)
 241             {
 242                 WND *wndPtr;
 243
 244                 if (dlgInfo->hUserFont) DeleteObject( dlgInfo->hUserFont );
 245                 if (dlgInfo->hMenu) DestroyMenu( dlgInfo->hMenu );
 246                 HeapFree( GetProcessHeap(), 0, dlgInfo );
 247
 248                 wndPtr = WIN_GetPtr( hwnd );
 249                 wndPtr->dlgInfo = NULL;
 250                 WIN_ReleasePtr( wndPtr );
 251             }
 252               /* Window clean-up */
 253             return DefWindowProcA( hwnd, msg, wParam, lParam );
 254
 255         case WM_SHOWWINDOW:
 256             if (!wParam) DEFDLG_SaveFocus( hwnd );
 257             return DefWindowProcA( hwnd, msg, wParam, lParam );
 258
 259         case WM_ACTIVATE:
 260             if (wParam) DEFDLG_RestoreFocus( hwnd, TRUE );
 261             else DEFDLG_SaveFocus( hwnd );
 262             return 0;
 263
 264         case WM_SETFOCUS:
 265             DEFDLG_RestoreFocus( hwnd, FALSE );
 266             return 0;
 267
 268         case DM_SETDEFID:
 269             if (dlgInfo && !(dlgInfo->flags & DF_END))
 270                 DEFDLG_SetDefId( hwnd, dlgInfo, wParam );
 271             return 1;
 272
 273         case DM_GETDEFID:
 274             if (dlgInfo && !(dlgInfo->flags & DF_END))
 275             {
 276                 HWND hwndDefId;
 277                 if (dlgInfo->idResult)
 278                     return MAKELONG( dlgInfo->idResult, DC_HASDEFID );
 279                 if ((hwndDefId = DEFDLG_FindDefButton( hwnd )))
 280                     return MAKELONG( GetDlgCtrlID( hwndDefId ), DC_HASDEFID);
 281             }
 282             return 0;
 283
 284         case WM_NEXTDLGCTL:
 285             if (dlgInfo)
 286             {
 287                 HWND hwndDest = (HWND)wParam;
 288                 if (!lParam)
 289                     hwndDest = GetNextDlgTabItem(hwnd, GetFocus(), wParam);
 290                 if (hwndDest) DEFDLG_SetFocus( hwndDest );
 291                 DEFDLG_SetDefButton( hwnd, dlgInfo, hwndDest );
 292             }
 293             return 0;
 294
 295         case WM_ENTERMENULOOP:
 296         case WM_LBUTTONDOWN:
 297         case WM_NCLBUTTONDOWN:
 298             {
 299                 HWND hwndFocus = GetFocus();
 300                 if (hwndFocus)
 301                 {
 302                     /* always make combo box hide its listbox control */
 303                     if (!SendMessageW( hwndFocus, CB_SHOWDROPDOWN, FALSE, 0 ))
 304                         SendMessageW( GetParent(hwndFocus), CB_SHOWDROPDOWN, FALSE, 0 );
 305                 }
 306             }
 307             return DefWindowProcA( hwnd, msg, wParam, lParam );
 308
 309         case WM_GETFONT:
 310             return dlgInfo ? (LRESULT)dlgInfo->hUserFont : 0;
 311
 312         case WM_CLOSE:
 313             PostMessageA( hwnd, WM_COMMAND, MAKEWPARAM(IDCANCEL, BN_CLICKED),
 314                             (LPARAM)GetDlgItem( hwnd, IDCANCEL ) );
 315             return 0;
 316     }
 317     return 0;
 318 }
 319
 320 /***********************************************************************
 321 *               DIALOG_get_info
 322 *
 323 * Get the DIALOGINFO structure of a window, allocating it if needed
 324 * and 'create' is TRUE.
 325 */
 326 DIALOGINFO *DIALOG_get_info( HWND hwnd, BOOL create )
 327 {
 328     WND* wndPtr;
 329     DIALOGINFO* dlgInfo;
 330
 331     wndPtr = WIN_GetPtr( hwnd );
 332     if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP)
 333     {
 334         SetLastError( ERROR_INVALID_WINDOW_HANDLE );
 335         return NULL;
 336     }
 337
 338     dlgInfo = wndPtr->dlgInfo;
 339
 340     if (!dlgInfo && create)
 341     {
 342         if (!(dlgInfo = HeapAlloc( GetProcessHeap(), 0, sizeof(*dlgInfo) )))
 343             goto out;
 344         dlgInfo->hwndFocus   = 0;
 345         dlgInfo->hUserFont   = 0;
 346         dlgInfo->hMenu       = 0;
 347         dlgInfo->xBaseUnit   = 0;
 348         dlgInfo->yBaseUnit   = 0;
 349         dlgInfo->idResult    = IDOK;
 350         dlgInfo->flags       = 0;
 351         wndPtr->dlgInfo = dlgInfo;
 352     }
 353
 354 out:
 355     WIN_ReleasePtr( wndPtr );
 356     return dlgInfo;
 357 }
 358
 359 /***********************************************************************
 360  *              DefDlgProcA (USER32.@)
 361  */
 362 LRESULT WINAPI DefDlgProcA( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam )
 363 {
 364     DIALOGINFO *dlgInfo;
 365     DLGPROC dlgproc;
 366     LRESULT result = 0;
 367
 368     /* Perform DIALOGINFO initialization if not done */
 369     if(!(dlgInfo = DIALOG_get_info( hwnd, TRUE ))) return 0;
 370
 371     SetWindowLongPtrW( hwnd, DWLP_MSGRESULT, 0 );
 372
 373     if ((dlgproc = DEFDLG_GetDlgProc( hwnd ))) /* Call dialog procedure */
 374         result = WINPROC_CallDlgProcA( dlgproc, hwnd, msg, wParam, lParam );
 375
 376     if (!result && IsWindow(hwnd))
 377     {
 378         /* callback didn't process this message */
 379
 380         switch(msg)
 381         {
 382             case WM_ERASEBKGND:
 383             case WM_SHOWWINDOW:
 384             case WM_ACTIVATE:
 385             case WM_SETFOCUS:
 386             case DM_SETDEFID:
 387             case DM_GETDEFID:
 388             case WM_NEXTDLGCTL:
 389             case WM_GETFONT:
 390             case WM_CLOSE:
 391             case WM_NCDESTROY:
 392             case WM_ENTERMENULOOP:
 393             case WM_LBUTTONDOWN:
 394             case WM_NCLBUTTONDOWN:
 395                  return DEFDLG_Proc( hwnd, msg, wParam, lParam, dlgInfo );
 396             case WM_INITDIALOG:
 397             case WM_VKEYTOITEM:
 398             case WM_COMPAREITEM:
 399             case WM_CHARTOITEM:
 400                  break;
 401
 402             default:
 403                  return DefWindowProcA( hwnd, msg, wParam, lParam );
 404         }
 405     }
 406
 407     if ((msg >= WM_CTLCOLORMSGBOX && msg <= WM_CTLCOLORSTATIC) ||
 408          msg == WM_CTLCOLOR || msg == WM_COMPAREITEM ||
 409          msg == WM_VKEYTOITEM || msg == WM_CHARTOITEM ||
 410          msg == WM_QUERYDRAGICON || msg == WM_INITDIALOG)
 411         return result;
 412
 413     return GetWindowLongPtrW( hwnd, DWLP_MSGRESULT );
 414 }
 415
 416
 417 /***********************************************************************
 418  *              DefDlgProcW (USER32.@)
 419  */
 420 LRESULT WINAPI DefDlgProcW( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam )
 421 {
 422     DIALOGINFO *dlgInfo;
 423     DLGPROC dlgproc;
 424     LRESULT result = 0;
 425
 426     /* Perform DIALOGINFO initialization if not done */
 427     if(!(dlgInfo = DIALOG_get_info( hwnd, TRUE ))) return 0;
 428
 429     SetWindowLongPtrW( hwnd, DWLP_MSGRESULT, 0 );
 430
 431     if ((dlgproc = DEFDLG_GetDlgProc( hwnd ))) /* Call dialog procedure */
 432         result = WINPROC_CallDlgProcW( dlgproc, hwnd, msg, wParam, lParam );
 433
 434     if (!result && IsWindow(hwnd))
 435     {
 436         /* callback didn't process this message */
 437
 438         switch(msg)
 439         {
 440             case WM_ERASEBKGND:
 441             case WM_SHOWWINDOW:
 442             case WM_ACTIVATE:
 443             case WM_SETFOCUS:
 444             case DM_SETDEFID:
 445             case DM_GETDEFID:
 446             case WM_NEXTDLGCTL:
 447             case WM_GETFONT:
 448             case WM_CLOSE:
 449             case WM_NCDESTROY:
 450             case WM_ENTERMENULOOP:
 451             case WM_LBUTTONDOWN:
 452             case WM_NCLBUTTONDOWN:
 453                  return DEFDLG_Proc( hwnd, msg, wParam, lParam, dlgInfo );
 454             case WM_INITDIALOG:
 455             case WM_VKEYTOITEM:
 456             case WM_COMPAREITEM:
 457             case WM_CHARTOITEM:
 458                  break;
 459
 460             default:
 461                  return DefWindowProcW( hwnd, msg, wParam, lParam );
 462         }
 463     }
 464
 465     if ((msg >= WM_CTLCOLORMSGBOX && msg <= WM_CTLCOLORSTATIC) ||
 466          msg == WM_CTLCOLOR || msg == WM_COMPAREITEM ||
 467          msg == WM_VKEYTOITEM || msg == WM_CHARTOITEM ||
 468          msg == WM_QUERYDRAGICON || msg == WM_INITDIALOG)
 469         return result;
 470
 471     return GetWindowLongPtrW( hwnd, DWLP_MSGRESULT );
 472 }