windows/painting.c

   1 /*
   2  * Window painting functions
   3  *
   4  * Copyright 1993, 1994, 1995 Alexandre Julliard
   5  */
   6
   7 #include <stdio.h>
   8 #include <X11/Xlib.h>
   9
  10 #include "win.h"
  11 #include "message.h"
  12 #include "gdi.h"
  13 #include "stddebug.h"
  14 /* #define DEBUG_WIN */
  15 #include "debug.h"
  16
  17   /* Last CTLCOLOR id */
  18 #define CTLCOLOR_MAX   CTLCOLOR_STATIC
  19
  20
  21 /***********************************************************************
  22  *           BeginPaint    (USER.39)
  23  */
  24 HDC BeginPaint( HWND hwnd, LPPAINTSTRUCT lps )
  25 {
  26     HRGN hrgnUpdate;
  27     WND * wndPtr = WIN_FindWndPtr( hwnd );
  28     if (!wndPtr) return 0;
  29
  30     hrgnUpdate = wndPtr->hrgnUpdate;  /* Save update region */
  31     if (!hrgnUpdate)    /* Create an empty region */
  32         if (!(hrgnUpdate = CreateRectRgn( 0, 0, 0, 0 ))) return 0;
  33
  34     if (wndPtr->hrgnUpdate || (wndPtr->flags & WIN_INTERNAL_PAINT))
  35         MSG_DecPaintCount( wndPtr->hmemTaskQ );
  36
  37     wndPtr->hrgnUpdate = 0;
  38     wndPtr->flags &= ~(WIN_NEEDS_BEGINPAINT | WIN_INTERNAL_PAINT);
  39
  40     HideCaret( hwnd );
  41
  42     if (wndPtr->flags & WIN_NEEDS_NCPAINT)
  43     {
  44         wndPtr->flags &= ~WIN_NEEDS_NCPAINT;
  45         SendMessage( hwnd, WM_NCPAINT, 0, 0 );
  46     }
  47
  48     lps->hdc = GetDCEx( hwnd, hrgnUpdate, DCX_INTERSECTRGN | DCX_USESTYLE );
  49     DeleteObject( hrgnUpdate );
  50     if (!lps->hdc)
  51     {
  52         fprintf( stderr, "GetDCEx() failed in BeginPaint(), hwnd="NPFMT"\n", hwnd );
  53         return 0;
  54     }
  55
  56     GetRgnBox( InquireVisRgn(lps->hdc), &lps->rcPaint );
  57     DPtoLP( lps->hdc, (LPPOINT)&lps->rcPaint, 2 );
  58
  59     if (wndPtr->flags & WIN_NEEDS_ERASEBKGND)
  60     {
  61         wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
  62         lps->fErase = !SendMessage( hwnd, WM_ERASEBKGND, (WPARAM)lps->hdc, 0 );
  63     }
  64     else lps->fErase = TRUE;
  65
  66     return lps->hdc;
  67 }
  68
  69
  70 /***********************************************************************
  71  *           EndPaint    (USER.40)
  72  */
  73 BOOL EndPaint( HWND hwnd, const PAINTSTRUCT* lps )
  74 {
  75     ReleaseDC( hwnd, lps->hdc );
  76     ShowCaret( hwnd );
  77     return TRUE;
  78 }
  79
  80
  81 /***********************************************************************
  82  *           FillWindow    (USER.324)
  83  */
  84 void FillWindow( HWND hwndParent, HWND hwnd, HDC hdc, HBRUSH hbrush )
  85 {
  86     RECT rect;
  87     GetClientRect( hwnd, &rect );
  88     DPtoLP( hdc, (LPPOINT)&rect, 2 );
  89     PaintRect( hwndParent, hwnd, hdc, hbrush, &rect );
  90 }
  91
  92
  93 /***********************************************************************
  94  *           PaintRect    (USER.325)
  95  */
  96 void PaintRect(HWND hwndParent, HWND hwnd, HDC hdc, HBRUSH hbrush, LPRECT rect)
  97 {
  98       /* Send WM_CTLCOLOR message if needed */
  99
 100     if ((DWORD)hbrush <= CTLCOLOR_MAX)
 101     {
 102         if (!hwndParent) return;
 103 #ifdef WINELIB32
 104         hbrush = (HBRUSH)SendMessage( hwndParent,
 105                                       WM_CTLCOLORMSGBOX+(DWORD)hbrush,
 106                                       (WPARAM)hdc, (LPARAM)hwnd );
 107 #else
 108         hbrush = (HBRUSH)SendMessage( hwndParent, WM_CTLCOLOR,
 109                                       hdc, MAKELONG( hwnd, hbrush ) );
 110 #endif
 111     }
 112     if (hbrush) FillRect( hdc, rect, hbrush );
 113 }
 114
 115
 116 /***********************************************************************
 117  *           GetControlBrush    (USER.326)
 118  */
 119 HBRUSH GetControlBrush( HWND hwnd, HDC hdc, WORD control )
 120 {
 121 #ifdef WINELIB32
 122     return (HBRUSH)SendMessage( GetParent(hwnd), WM_CTLCOLOR+control,
 123                                 (WPARAM)hdc, (LPARAM)hwnd );
 124 #else
 125     return (HBRUSH)SendMessage( GetParent(hwnd), WM_CTLCOLOR,
 126                                 hdc, MAKELONG( hwnd, control ) );
 127 #endif
 128 }
 129
 130
 131 /***********************************************************************
 132  *           RedrawWindow    (USER.290)
 133  */
 134 BOOL RedrawWindow( HWND hwnd, LPRECT rectUpdate, HRGN hrgnUpdate, UINT flags )
 135 {
 136     HRGN tmpRgn, hrgn;
 137     RECT rectClient;
 138     WND * wndPtr;
 139
 140     if (!hwnd) hwnd = GetDesktopWindow();
 141     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return FALSE;
 142     if (!IsWindowVisible(hwnd) || (wndPtr->flags & WIN_NO_REDRAW))
 143         return TRUE;  /* No redraw needed */
 144
 145     if (rectUpdate)
 146     {
 147         dprintf_win( stddeb, "RedrawWindow: "NPFMT" %ld,%ld-%ld,%ld "NPFMT" flags=%04x\n",
 148                      hwnd, (LONG)rectUpdate->left, (LONG)rectUpdate->top,
 149                      (LONG)rectUpdate->right, (LONG)rectUpdate->bottom, hrgnUpdate, flags);
 150     }
 151     else
 152     {
 153         dprintf_win( stddeb, "RedrawWindow: "NPFMT" NULL "NPFMT" flags=%04x\n",
 154                      hwnd, hrgnUpdate, flags);
 155     }
 156     GetClientRect( hwnd, &rectClient );
 157
 158     if (flags & RDW_INVALIDATE)  /* Invalidate */
 159     {
 160         if (wndPtr->hrgnUpdate)  /* Is there already an update region? */
 161         {
 162             tmpRgn = CreateRectRgn( 0, 0, 0, 0 );
 163             if ((hrgn = hrgnUpdate) == 0)
 164                 hrgn = CreateRectRgnIndirect( rectUpdate ? rectUpdate :
 165                                               &rectClient );
 166             CombineRgn( tmpRgn, wndPtr->hrgnUpdate, hrgn, RGN_OR );
 167             DeleteObject( wndPtr->hrgnUpdate );
 168             wndPtr->hrgnUpdate = tmpRgn;
 169             if (!hrgnUpdate) DeleteObject( hrgn );
 170         }
 171         else  /* No update region yet */
 172         {
 173             if (!(wndPtr->flags & WIN_INTERNAL_PAINT))
 174                 MSG_IncPaintCount( wndPtr->hmemTaskQ );
 175             if (hrgnUpdate)
 176             {
 177                 wndPtr->hrgnUpdate = CreateRectRgn( 0, 0, 0, 0 );
 178                 CombineRgn( wndPtr->hrgnUpdate, hrgnUpdate, 0, RGN_COPY );
 179             }
 180             else wndPtr->hrgnUpdate = CreateRectRgnIndirect( rectUpdate ?
 181                                                     rectUpdate : &rectClient );
 182         }
 183         if (flags & RDW_FRAME) wndPtr->flags |= WIN_NEEDS_NCPAINT;
 184         if (flags & RDW_ERASE) wndPtr->flags |= WIN_NEEDS_ERASEBKGND;
 185         flags |= RDW_FRAME;  /* Force invalidating the frame of children */
 186     }
 187     else if (flags & RDW_VALIDATE)  /* Validate */
 188     {
 189           /* We need an update region in order to validate anything */
 190         if (wndPtr->hrgnUpdate)
 191         {
 192             if (!hrgnUpdate && !rectUpdate)
 193             {
 194                   /* Special case: validate everything */
 195                 DeleteObject( wndPtr->hrgnUpdate );
 196                 wndPtr->hrgnUpdate = 0;
 197             }
 198             else
 199             {
 200                 tmpRgn = CreateRectRgn( 0, 0, 0, 0 );
 201                 if ((hrgn = hrgnUpdate) == 0)
 202                     hrgn = CreateRectRgnIndirect( rectUpdate );
 203                 if (CombineRgn( tmpRgn, wndPtr->hrgnUpdate,
 204                                 hrgn, RGN_DIFF ) == NULLREGION)
 205                 {
 206                     DeleteObject( tmpRgn );
 207                     tmpRgn = 0;
 208                 }
 209                 DeleteObject( wndPtr->hrgnUpdate );
 210                 wndPtr->hrgnUpdate = tmpRgn;
 211                 if (!hrgnUpdate) DeleteObject( hrgn );
 212             }
 213             if (!wndPtr->hrgnUpdate)  /* No more update region */
 214                 if (!(wndPtr->flags & WIN_INTERNAL_PAINT))
 215                     MSG_DecPaintCount( wndPtr->hmemTaskQ );
 216         }
 217         if (flags & RDW_NOFRAME) wndPtr->flags &= ~WIN_NEEDS_NCPAINT;
 218         if (flags & RDW_NOERASE) wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 219     }
 220
 221       /* Set/clear internal paint flag */
 222
 223     if (flags & RDW_INTERNALPAINT)
 224     {
 225         if (!wndPtr->hrgnUpdate && !(wndPtr->flags & WIN_INTERNAL_PAINT))
 226             MSG_IncPaintCount( wndPtr->hmemTaskQ );
 227         wndPtr->flags |= WIN_INTERNAL_PAINT;
 228     }
 229     else if (flags & RDW_NOINTERNALPAINT)
 230     {
 231         if (!wndPtr->hrgnUpdate && (wndPtr->flags & WIN_INTERNAL_PAINT))
 232             MSG_DecPaintCount( wndPtr->hmemTaskQ );
 233         wndPtr->flags &= ~WIN_INTERNAL_PAINT;
 234     }
 235
 236       /* Erase/update window */
 237
 238     if (flags & RDW_UPDATENOW) SendMessage( hwnd, WM_PAINT, 0, 0 );
 239     else if (flags & RDW_ERASENOW)
 240     {
 241         if (wndPtr->flags & WIN_NEEDS_NCPAINT)
 242         {
 243             wndPtr->flags &= ~WIN_NEEDS_NCPAINT;
 244             SendMessage( hwnd, WM_NCPAINT, 0, 0 );
 245         }
 246         if (wndPtr->flags & WIN_NEEDS_ERASEBKGND)
 247         {
 248             HDC hdc = GetDCEx( hwnd, wndPtr->hrgnUpdate,
 249                                DCX_INTERSECTRGN | DCX_USESTYLE );
 250             if (hdc)
 251             {
 252               /* Don't send WM_ERASEBKGND to icons */
 253               /* (WM_ICONERASEBKGND is sent during processing of WM_NCPAINT) */
 254                 if (!(wndPtr->dwStyle & WS_MINIMIZE)
 255                     || !WIN_CLASS_INFO(wndPtr).hIcon)
 256                 {
 257                     if (SendMessage( hwnd, WM_ERASEBKGND, (WPARAM)hdc, 0 ))
 258                         wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 259                 }
 260                 ReleaseDC( hwnd, hdc );
 261             }
 262         }
 263     }
 264
 265       /* Recursively process children */
 266
 267     if (!(flags & RDW_NOCHILDREN) &&
 268         ((flags & RDW_ALLCHILDREN) || !(wndPtr->dwStyle & WS_CLIPCHILDREN)))
 269     {
 270         if (hrgnUpdate)
 271         {
 272             HRGN hrgn = CreateRectRgn( 0, 0, 0, 0 );
 273             if (!hrgn) return TRUE;
 274             for (hwnd = wndPtr->hwndChild; (hwnd); hwnd = wndPtr->hwndNext)
 275             {
 276                 if (!(wndPtr = WIN_FindWndPtr( hwnd ))) break;
 277                 CombineRgn( hrgn, hrgnUpdate, 0, RGN_COPY );
 278                 OffsetRgn( hrgn, -wndPtr->rectClient.left,
 279                                  -wndPtr->rectClient.top );
 280                 RedrawWindow( hwnd, NULL, hrgn, flags );
 281             }
 282             DeleteObject( hrgn );
 283         }
 284         else
 285         {
 286             RECT rect;
 287             for (hwnd = wndPtr->hwndChild; (hwnd); hwnd = wndPtr->hwndNext)
 288             {
 289                 if (!(wndPtr = WIN_FindWndPtr( hwnd ))) break;
 290                 if (rectUpdate)
 291                 {
 292                     rect = *rectUpdate;
 293                     OffsetRect( &rect, -wndPtr->rectClient.left,
 294                                        -wndPtr->rectClient.top );
 295                     RedrawWindow( hwnd, &rect, 0, flags );
 296                 }
 297                 else RedrawWindow( hwnd, NULL, 0, flags );
 298             }
 299         }
 300     }
 301     return TRUE;
 302 }
 303
 304
 305 /***********************************************************************
 306  *           UpdateWindow   (USER.124)
 307  */
 308 void UpdateWindow( HWND hwnd )
 309 {
 310     RedrawWindow( hwnd, NULL, 0, RDW_UPDATENOW | RDW_NOCHILDREN );
 311 }
 312
 313
 314 /***********************************************************************
 315  *           InvalidateRgn   (USER.126)
 316  */
 317 void InvalidateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
 318 {
 319     RedrawWindow( hwnd, NULL, hrgn, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
 320 }
 321
 322
 323 /***********************************************************************
 324  *           InvalidateRect   (USER.125)
 325  */
 326 void InvalidateRect( HWND hwnd, LPRECT rect, BOOL erase )
 327 {
 328     RedrawWindow( hwnd, rect, 0, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
 329 }
 330
 331
 332 /***********************************************************************
 333  *           ValidateRgn   (USER.128)
 334  */
 335 void ValidateRgn( HWND hwnd, HRGN hrgn )
 336 {
 337     RedrawWindow( hwnd, NULL, hrgn, RDW_VALIDATE | RDW_NOCHILDREN );
 338 }
 339
 340
 341 /***********************************************************************
 342  *           ValidateRect   (USER.127)
 343  */
 344 void ValidateRect( HWND hwnd, LPRECT rect )
 345 {
 346     RedrawWindow( hwnd, rect, 0, RDW_VALIDATE | RDW_NOCHILDREN );
 347 }
 348
 349
 350 /***********************************************************************
 351  *           GetUpdateRect   (USER.190)
 352  */
 353 BOOL GetUpdateRect( HWND hwnd, LPRECT rect, BOOL erase )
 354 {
 355     WND * wndPtr = WIN_FindWndPtr( hwnd );
 356     if (!wndPtr) return FALSE;
 357
 358     if (rect)
 359     {
 360         if (wndPtr->hrgnUpdate)
 361         {
 362             HRGN hrgn = CreateRectRgn( 0, 0, 0, 0 );
 363             if (GetUpdateRgn( hwnd, hrgn, erase ) == ERROR) return FALSE;
 364             GetRgnBox( hrgn, rect );
 365             DeleteObject( hrgn );
 366         }
 367         else SetRectEmpty( rect );
 368     }
 369     return (wndPtr->hrgnUpdate != 0);
 370 }
 371
 372
 373 /***********************************************************************
 374  *           GetUpdateRgn   (USER.237)
 375  */
 376 int GetUpdateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
 377 {
 378     int retval;
 379     WND * wndPtr = WIN_FindWndPtr( hwnd );
 380     if (!wndPtr) return ERROR;
 381
 382     if (!wndPtr->hrgnUpdate)
 383     {
 384         SetRectRgn( hrgn, 0, 0, 0, 0 );
 385         return NULLREGION;
 386     }
 387     retval = CombineRgn( hrgn, wndPtr->hrgnUpdate, 0, RGN_COPY );
 388     if (erase) RedrawWindow( hwnd, NULL, 0, RDW_ERASENOW | RDW_NOCHILDREN );
 389     return retval;
 390 }
 391
 392
 393 /***********************************************************************
 394  *           ExcludeUpdateRgn   (USER.238)
 395  */
 396 int ExcludeUpdateRgn( HDC hdc, HWND hwnd )
 397 {
 398     int retval = ERROR;
 399     HRGN hrgn;
 400     WND * wndPtr;
 401
 402     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return ERROR;
 403     if ((hrgn = CreateRectRgn( 0, 0, 0, 0 )) != 0)
 404     {
 405         retval = CombineRgn( hrgn, InquireVisRgn(hdc),
 406                              wndPtr->hrgnUpdate, RGN_DIFF );
 407         if (retval) SelectVisRgn( hdc, hrgn );
 408         DeleteObject( hrgn );
 409     }
 410     return retval;
 411 }
 412
 413