controls/button.c

   1 /* File: button.c -- Button type widgets
   2  *
   3  * Copyright (C) 1993 Johannes Ruscheinski
   4  * Copyright (C) 1993 David Metcalfe
   5  * Copyright (C) 1994 Alexandre Julliard
   6  */
   7
   8 #include <string.h>
   9 #include <stdlib.h>
  10
  11 #include "winbase.h"
  12 #include "windef.h"
  13 #include "wingdi.h"
  14 #include "wine/winuser16.h"
  15 #include "controls.h"
  16 #include "user.h"
  17
  18 /* GetWindowLong offsets for window extra information */
  19 #define STATE_GWL_OFFSET  0
  20 #define HFONT_GWL_OFFSET  (sizeof(LONG))
  21 #define HIMAGE_GWL_OFFSET (2*sizeof(LONG))
  22 #define NB_EXTRA_BYTES    (3*sizeof(LONG))
  23
  24   /* Button state values */
  25 #define BUTTON_UNCHECKED       0x00
  26 #define BUTTON_CHECKED         0x01
  27 #define BUTTON_3STATE          0x02
  28 #define BUTTON_HIGHLIGHTED     0x04
  29 #define BUTTON_HASFOCUS        0x08
  30 #define BUTTON_NSTATES         0x0F
  31   /* undocumented flags */
  32 #define BUTTON_BTNPRESSED      0x40
  33 #define BUTTON_UNKNOWN2        0x20
  34 #define BUTTON_UNKNOWN3        0x10
  35
  36 static void PB_Paint( HWND hwnd, HDC hDC, UINT action );
  37 static void CB_Paint( HWND hwnd, HDC hDC, UINT action );
  38 static void GB_Paint( HWND hwnd, HDC hDC, UINT action );
  39 static void UB_Paint( HWND hwnd, HDC hDC, UINT action );
  40 static void OB_Paint( HWND hwnd, HDC hDC, UINT action );
  41 static void BUTTON_CheckAutoRadioButton( HWND hwnd );
  42 static LRESULT WINAPI ButtonWndProcA( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
  43 static LRESULT WINAPI ButtonWndProcW( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
  44
  45 #define MAX_BTN_TYPE  12
  46
  47 static const WORD maxCheckState[MAX_BTN_TYPE] =
  48 {
  49     BUTTON_UNCHECKED,   /* BS_PUSHBUTTON */
  50     BUTTON_UNCHECKED,   /* BS_DEFPUSHBUTTON */
  51     BUTTON_CHECKED,     /* BS_CHECKBOX */
  52     BUTTON_CHECKED,     /* BS_AUTOCHECKBOX */
  53     BUTTON_CHECKED,     /* BS_RADIOBUTTON */
  54     BUTTON_3STATE,      /* BS_3STATE */
  55     BUTTON_3STATE,      /* BS_AUTO3STATE */
  56     BUTTON_UNCHECKED,   /* BS_GROUPBOX */
  57     BUTTON_UNCHECKED,   /* BS_USERBUTTON */
  58     BUTTON_CHECKED,     /* BS_AUTORADIOBUTTON */
  59     BUTTON_UNCHECKED,   /* Not defined */
  60     BUTTON_UNCHECKED    /* BS_OWNERDRAW */
  61 };
  62
  63 typedef void (*pfPaint)( HWND hwnd, HDC hdc, UINT action );
  64
  65 static const pfPaint btnPaintFunc[MAX_BTN_TYPE] =
  66 {
  67     PB_Paint,    /* BS_PUSHBUTTON */
  68     PB_Paint,    /* BS_DEFPUSHBUTTON */
  69     CB_Paint,    /* BS_CHECKBOX */
  70     CB_Paint,    /* BS_AUTOCHECKBOX */
  71     CB_Paint,    /* BS_RADIOBUTTON */
  72     CB_Paint,    /* BS_3STATE */
  73     CB_Paint,    /* BS_AUTO3STATE */
  74     GB_Paint,    /* BS_GROUPBOX */
  75     UB_Paint,    /* BS_USERBUTTON */
  76     CB_Paint,    /* BS_AUTORADIOBUTTON */
  77     NULL,        /* Not defined */
  78     OB_Paint     /* BS_OWNERDRAW */
  79 };
  80
  81 static HBITMAP hbitmapCheckBoxes = 0;
  82 static WORD checkBoxWidth = 0, checkBoxHeight = 0;
  83
  84
  85 /*********************************************************************
  86  * button class descriptor
  87  */
  88 const struct builtin_class_descr BUTTON_builtin_class =
  89 {
  90     "Button",            /* name */
  91     CS_GLOBALCLASS | CS_DBLCLKS | CS_VREDRAW | CS_HREDRAW | CS_PARENTDC, /* style  */
  92     ButtonWndProcA,      /* procA */
  93     ButtonWndProcW,      /* procW */
  94     NB_EXTRA_BYTES,      /* extra */
  95     IDC_ARROWA,          /* cursor */
  96     0                    /* brush */
  97 };
  98
  99
 100 inline static LONG get_button_state( HWND hwnd )
 101 {
 102     return GetWindowLongA( hwnd, STATE_GWL_OFFSET );
 103 }
 104
 105 inline static void set_button_state( HWND hwnd, LONG state )
 106 {
 107     SetWindowLongA( hwnd, STATE_GWL_OFFSET, state );
 108 }
 109
 110 inline static HFONT get_button_font( HWND hwnd )
 111 {
 112     return GetWindowLongA( hwnd, HFONT_GWL_OFFSET );
 113 }
 114
 115 inline static void set_button_font( HWND hwnd, HFONT font )
 116 {
 117     SetWindowLongA( hwnd, HFONT_GWL_OFFSET, font );
 118 }
 119
 120 inline static UINT get_button_type( LONG window_style )
 121 {
 122     return (window_style & 0x0f);
 123 }
 124
 125 /* paint a button of any type */
 126 inline static void paint_button( HWND hwnd, LONG style, UINT action )
 127 {
 128     if (btnPaintFunc[style] && IsWindowVisible(hwnd))
 129     {
 130         HDC hdc = GetDC( hwnd );
 131         btnPaintFunc[style]( hwnd, hdc, action );
 132         ReleaseDC( hwnd, hdc );
 133     }
 134 }
 135
 136 /* retrieve the button text; returned buffer must be freed by caller */
 137 inline static WCHAR *get_button_text( HWND hwnd )
 138 {
 139     INT len = GetWindowTextLengthW( hwnd );
 140     WCHAR *buffer = HeapAlloc( GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR) );
 141     if (buffer) GetWindowTextW( hwnd, buffer, len + 1 );
 142     return buffer;
 143 }
 144
 145 /***********************************************************************
 146  *           ButtonWndProc_common
 147  */
 148 static LRESULT WINAPI ButtonWndProc_common(HWND hWnd, UINT uMsg,
 149                                            WPARAM wParam, LPARAM lParam, BOOL unicode )
 150 {
 151     RECT rect;
 152     POINT pt;
 153     LONG style = GetWindowLongA( hWnd, GWL_STYLE );
 154     UINT btn_type = get_button_type( style );
 155     LONG state;
 156     HANDLE oldHbitmap;
 157
 158     pt.x = LOWORD(lParam);
 159     pt.y = HIWORD(lParam);
 160
 161     switch (uMsg)
 162     {
 163     case WM_GETDLGCODE:
 164         switch(btn_type)
 165         {
 166         case BS_PUSHBUTTON:      return DLGC_BUTTON | DLGC_UNDEFPUSHBUTTON;
 167         case BS_DEFPUSHBUTTON:   return DLGC_BUTTON | DLGC_DEFPUSHBUTTON;
 168         case BS_RADIOBUTTON:
 169         case BS_AUTORADIOBUTTON: return DLGC_BUTTON | DLGC_RADIOBUTTON;
 170         default:                 return DLGC_BUTTON;
 171         }
 172
 173     case WM_ENABLE:
 174         paint_button( hWnd, btn_type, ODA_DRAWENTIRE );
 175         break;
 176
 177     case WM_CREATE:
 178         if (!hbitmapCheckBoxes)
 179         {
 180             BITMAP bmp;
 181             hbitmapCheckBoxes = LoadBitmapW(0, MAKEINTRESOURCEW(OBM_CHECKBOXES));
 182             GetObjectW( hbitmapCheckBoxes, sizeof(bmp), &bmp );
 183             checkBoxWidth  = bmp.bmWidth / 4;
 184             checkBoxHeight = bmp.bmHeight / 3;
 185         }
 186         if (btn_type < 0L || btn_type >= MAX_BTN_TYPE)
 187             return -1; /* abort */
 188         set_button_state( hWnd, BUTTON_UNCHECKED );
 189         return 0;
 190
 191     case WM_ERASEBKGND:
 192         return 1;
 193
 194     case WM_PAINT:
 195         if (btnPaintFunc[btn_type])
 196         {
 197             PAINTSTRUCT ps;
 198             HDC hdc = wParam ? (HDC)wParam : BeginPaint( hWnd, &ps );
 199             int nOldMode = SetBkMode( hdc, OPAQUE );
 200             (btnPaintFunc[btn_type])( hWnd, hdc, ODA_DRAWENTIRE );
 201             SetBkMode(hdc, nOldMode); /*  reset painting mode */
 202             if( !wParam ) EndPaint( hWnd, &ps );
 203         }
 204         break;
 205
 206     case WM_KEYDOWN:
 207         if (wParam == VK_SPACE)
 208         {
 209             SendMessageW( hWnd, BM_SETSTATE, TRUE, 0 );
 210             set_button_state( hWnd, get_button_state( hWnd ) | BUTTON_BTNPRESSED );
 211         }
 212         break;
 213
 214     case WM_LBUTTONDBLCLK:
 215         if(style & BS_NOTIFY ||
 216            btn_type == BS_RADIOBUTTON ||
 217            btn_type == BS_USERBUTTON ||
 218            btn_type == BS_OWNERDRAW)
 219         {
 220             SendMessageW( GetParent(hWnd), WM_COMMAND,
 221                           MAKEWPARAM( GetWindowLongA(hWnd,GWL_ID), BN_DOUBLECLICKED ), hWnd);
 222             break;
 223         }
 224         /* fall through */
 225     case WM_LBUTTONDOWN:
 226         SetCapture( hWnd );
 227         SetFocus( hWnd );
 228         SendMessageW( hWnd, BM_SETSTATE, TRUE, 0 );
 229         set_button_state( hWnd, get_button_state( hWnd ) | BUTTON_BTNPRESSED );
 230         break;
 231
 232     case WM_KEYUP:
 233         if (wParam != VK_SPACE)
 234             break;
 235         /* fall through */
 236     case WM_LBUTTONUP:
 237         state = get_button_state( hWnd );
 238         if (!(state & BUTTON_BTNPRESSED)) break;
 239         state &= BUTTON_NSTATES;
 240         set_button_state( hWnd, state );
 241         if (!(state & BUTTON_HIGHLIGHTED))
 242         {
 243             ReleaseCapture();
 244             break;
 245         }
 246         SendMessageW( hWnd, BM_SETSTATE, FALSE, 0 );
 247         ReleaseCapture();
 248         GetClientRect( hWnd, &rect );
 249         if (uMsg == WM_KEYUP || PtInRect( &rect, pt ))
 250         {
 251             state = get_button_state( hWnd );
 252             switch(btn_type)
 253             {
 254             case BS_AUTOCHECKBOX:
 255                 SendMessageW( hWnd, BM_SETCHECK, !(state & BUTTON_CHECKED), 0 );
 256                 break;
 257             case BS_AUTORADIOBUTTON:
 258                 SendMessageW( hWnd, BM_SETCHECK, TRUE, 0 );
 259                 break;
 260             case BS_AUTO3STATE:
 261                 SendMessageW( hWnd, BM_SETCHECK,
 262                                 (state & BUTTON_3STATE) ? 0 : ((state & 3) + 1), 0 );
 263                 break;
 264             }
 265             SendMessageW( GetParent(hWnd), WM_COMMAND,
 266                           MAKEWPARAM( GetWindowLongA(hWnd,GWL_ID), BN_CLICKED ), hWnd);
 267         }
 268         break;
 269
 270     case WM_CAPTURECHANGED:
 271         state = get_button_state( hWnd );
 272         if (state & BUTTON_BTNPRESSED)
 273         {
 274             state &= BUTTON_NSTATES;
 275             set_button_state( hWnd, state );
 276             if (state & BUTTON_HIGHLIGHTED) SendMessageW( hWnd, BM_SETSTATE, FALSE, 0 );
 277         }
 278         break;
 279
 280     case WM_MOUSEMOVE:
 281         if (GetCapture() == hWnd)
 282         {
 283             GetClientRect( hWnd, &rect );
 284             SendMessageW( hWnd, BM_SETSTATE, PtInRect(&rect, pt), 0 );
 285         }
 286         break;
 287
 288     case WM_SETTEXT:
 289         if (unicode) DefWindowProcW( hWnd, WM_SETTEXT, wParam, lParam );
 290         else DefWindowProcA( hWnd, WM_SETTEXT, wParam, lParam );
 291         paint_button( hWnd, btn_type, ODA_DRAWENTIRE );
 292         return 1; /* success. FIXME: check text length */
 293
 294     case WM_SETFONT:
 295         set_button_font( hWnd, wParam );
 296         if (lParam) paint_button( hWnd, btn_type, ODA_DRAWENTIRE );
 297         break;
 298
 299     case WM_GETFONT:
 300         return get_button_font( hWnd );
 301
 302     case WM_SETFOCUS:
 303         if ((btn_type == BS_RADIOBUTTON || btn_type == BS_AUTORADIOBUTTON) && (GetCapture() != hWnd) &&
 304             !(SendMessageW(hWnd, BM_GETCHECK, 0, 0) & BST_CHECKED))
 305         {
 306             /* The notification is sent when the button (BS_AUTORADIOBUTTON)
 307                is unchecked and the focus was not given by a mouse click. */
 308             if (btn_type == BS_AUTORADIOBUTTON)
 309                 SendMessageW( hWnd, BM_SETCHECK, BUTTON_CHECKED, 0 );
 310             SendMessageW( GetParent(hWnd), WM_COMMAND,
 311                           MAKEWPARAM( GetWindowLongA(hWnd,GWL_ID), BN_CLICKED ), hWnd);
 312         }
 313         set_button_state( hWnd, get_button_state(hWnd) | BUTTON_HASFOCUS );
 314         paint_button( hWnd, btn_type, ODA_FOCUS );
 315         break;
 316
 317     case WM_KILLFOCUS:
 318         set_button_state( hWnd, get_button_state(hWnd) & ~BUTTON_HASFOCUS );
 319         paint_button( hWnd, btn_type, ODA_FOCUS );
 320         InvalidateRect( hWnd, NULL, TRUE );
 321         break;
 322
 323     case WM_SYSCOLORCHANGE:
 324         InvalidateRect( hWnd, NULL, FALSE );
 325         break;
 326
 327     case BM_SETSTYLE16:
 328     case BM_SETSTYLE:
 329         if ((wParam & 0x0f) >= MAX_BTN_TYPE) break;
 330         btn_type = wParam & 0x0f;
 331         style = (style & ~0x0f) | btn_type;
 332         SetWindowLongA( hWnd, GWL_STYLE, style );
 333
 334         /* Only redraw if lParam flag is set.*/
 335         if (lParam)
 336            paint_button( hWnd, btn_type, ODA_DRAWENTIRE );
 337
 338         break;
 339
 340     case BM_CLICK:
 341         SendMessageW( hWnd, WM_LBUTTONDOWN, 0, 0 );
 342         SendMessageW( hWnd, WM_LBUTTONUP, 0, 0 );
 343         break;
 344
 345     case BM_SETIMAGE:
 346         /* Check that image format matches button style */
 347         switch (style & (BS_BITMAP|BS_ICON))
 348         {
 349         case BS_BITMAP:
 350             if (wParam != IMAGE_BITMAP) return 0;
 351             break;
 352         case BS_ICON:
 353             if (wParam != IMAGE_ICON) return 0;
 354             break;
 355         default:
 356             return 0;
 357         }
 358         oldHbitmap = SetWindowLongA( hWnd, HIMAGE_GWL_OFFSET, lParam );
 359         InvalidateRect( hWnd, NULL, FALSE );
 360         return oldHbitmap;
 361
 362     case BM_GETIMAGE:
 363         return GetWindowLongA( hWnd, HIMAGE_GWL_OFFSET );
 364
 365     case BM_GETCHECK16:
 366     case BM_GETCHECK:
 367         return get_button_state( hWnd ) & 3;
 368
 369     case BM_SETCHECK16:
 370     case BM_SETCHECK:
 371         if (wParam > maxCheckState[btn_type]) wParam = maxCheckState[btn_type];
 372         state = get_button_state( hWnd );
 373         if ((state & 3) != wParam)
 374         {
 375             if ((btn_type == BS_RADIOBUTTON) || (btn_type == BS_AUTORADIOBUTTON))
 376             {
 377                 if (wParam) style |= WS_TABSTOP;
 378                 else style &= ~WS_TABSTOP;
 379                 SetWindowLongA( hWnd, GWL_STYLE, style );
 380             }
 381             set_button_state( hWnd, (state & ~3) | wParam );
 382             paint_button( hWnd, btn_type, ODA_SELECT );
 383         }
 384         if ((btn_type == BS_AUTORADIOBUTTON) && (wParam == BUTTON_CHECKED) && (style & WS_CHILD))
 385             BUTTON_CheckAutoRadioButton( hWnd );
 386         break;
 387
 388     case BM_GETSTATE16:
 389     case BM_GETSTATE:
 390         return get_button_state( hWnd );
 391
 392     case BM_SETSTATE16:
 393     case BM_SETSTATE:
 394         state = get_button_state( hWnd );
 395         if (wParam)
 396         {
 397             if (state & BUTTON_HIGHLIGHTED) break;
 398             set_button_state( hWnd, state | BUTTON_HIGHLIGHTED );
 399         }
 400         else
 401         {
 402             if (!(state & BUTTON_HIGHLIGHTED)) break;
 403             set_button_state( hWnd, state & ~BUTTON_HIGHLIGHTED );
 404         }
 405         paint_button( hWnd, btn_type, ODA_SELECT );
 406         break;
 407
 408     case WM_NCHITTEST:
 409         if(btn_type == BS_GROUPBOX) return HTTRANSPARENT;
 410         /* fall through */
 411     default:
 412         return unicode ? DefWindowProcW(hWnd, uMsg, wParam, lParam) :
 413                          DefWindowProcA(hWnd, uMsg, wParam, lParam);
 414     }
 415     return 0;
 416 }
 417
 418 /***********************************************************************
 419  *           ButtonWndProcW
 420  * The button window procedure. This is just a wrapper which locks
 421  * the passed HWND and calls the real window procedure (with a WND*
 422  * pointer pointing to the locked windowstructure).
 423  */
 424 static LRESULT WINAPI ButtonWndProcW( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
 425 {
 426     if (!IsWindow( hWnd )) return 0;
 427     return ButtonWndProc_common( hWnd, uMsg, wParam, lParam, TRUE );
 428 }
 429
 430
 431 /***********************************************************************
 432  *           ButtonWndProcA
 433  */
 434 static LRESULT WINAPI ButtonWndProcA( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
 435 {
 436     if (!IsWindow( hWnd )) return 0;
 437     return ButtonWndProc_common( hWnd, uMsg, wParam, lParam, FALSE );
 438 }
 439
 440
 441 /**********************************************************************
 442  * Convert button styles to flags used by DrawText.
 443  * TODO: handle WS_EX_RIGHT extended style.
 444  */
 445 static UINT BUTTON_BStoDT(DWORD style)
 446 {
 447    UINT dtStyle = DT_NOCLIP;  /* We use SelectClipRgn to limit output */
 448
 449    /* "Convert" pushlike buttons to pushbuttons */
 450    if (style & BS_PUSHLIKE)
 451       style &= ~0x0F;
 452
 453    if (!(style & BS_MULTILINE))
 454       dtStyle |= DT_SINGLELINE;
 455    else
 456       dtStyle |= DT_WORDBREAK;
 457
 458    switch (style & BS_CENTER)
 459    {
 460       case BS_LEFT:   /* DT_LEFT is 0 */    break;
 461       case BS_RIGHT:  dtStyle |= DT_RIGHT;  break;
 462       case BS_CENTER: dtStyle |= DT_CENTER; break;
 463       default:
 464          /* Pushbutton's text is centered by default */
 465          if (get_button_type(style) <= BS_DEFPUSHBUTTON) dtStyle |= DT_CENTER;
 466          /* all other flavours have left aligned text */
 467    }
 468
 469    /* DrawText ignores vertical alignment for multiline text,
 470     * but we use these flags to align label manualy.
 471     */
 472    if (get_button_type(style) != BS_GROUPBOX)
 473    {
 474       switch (style & BS_VCENTER)
 475       {
 476          case BS_TOP:     /* DT_TOP is 0 */      break;
 477          case BS_BOTTOM:  dtStyle |= DT_BOTTOM;  break;
 478          case BS_VCENTER: /* fall through */
 479          default:         dtStyle |= DT_VCENTER; break;
 480       }
 481    }
 482    else
 483       /* GroupBox's text is always single line and is top aligned. */
 484       dtStyle |= DT_SINGLELINE;
 485
 486    return dtStyle;
 487 }
 488
 489 /**********************************************************************
 490  *       BUTTON_CalcLabelRect
 491  *
 492  *   Calculates label's rectangle depending on button style.
 493  *
 494  * Returns flags to be passed to DrawText.
 495  * Calculated rectangle doesn't take into account button state
 496  * (pushed, etc.). If there is nothing to draw (no text/image) output
 497  * rectangle is empty, and return value is (UINT)-1.
 498  */
 499 static UINT BUTTON_CalcLabelRect(HWND hwnd, HDC hdc, RECT *rc)
 500 {
 501    LONG style = GetWindowLongA( hwnd, GWL_STYLE );
 502    WCHAR *text;
 503    ICONINFO    iconInfo;
 504    BITMAP      bm;
 505    UINT        dtStyle = BUTTON_BStoDT(style);
 506    RECT        r = *rc;
 507    INT         n;
 508
 509    /* Calculate label rectangle according to label type */
 510    switch (style & (BS_ICON|BS_BITMAP))
 511    {
 512       case BS_TEXT:
 513           if (!(text = get_button_text( hwnd ))) goto empty_rect;
 514           if (!text[0])
 515           {
 516               HeapFree( GetProcessHeap(), 0, text );
 517               goto empty_rect;
 518           }
 519           DrawTextW(hdc, text, -1, &r, dtStyle | DT_CALCRECT);
 520           HeapFree( GetProcessHeap(), 0, text );
 521           break;
 522
 523       case BS_ICON:
 524          if (!GetIconInfo((HICON)GetWindowLongA( hwnd, HIMAGE_GWL_OFFSET ), &iconInfo))
 525             goto empty_rect;
 526
 527          GetObjectW (iconInfo.hbmColor, sizeof(BITMAP), &bm);
 528
 529          r.right  = r.left + bm.bmWidth;
 530          r.bottom = r.top  + bm.bmHeight;
 531
 532          DeleteObject(iconInfo.hbmColor);
 533          DeleteObject(iconInfo.hbmMask);
 534          break;
 535
 536       case BS_BITMAP:
 537          if (!GetObjectW( (HANDLE)GetWindowLongA( hwnd, HIMAGE_GWL_OFFSET ), sizeof(BITMAP), &bm))
 538             goto empty_rect;
 539
 540          r.right  = r.left + bm.bmWidth;
 541          r.bottom = r.top  + bm.bmHeight;
 542          break;
 543
 544       default:
 545       empty_rect:
 546          r.right = r.left;
 547          r.bottom = r.top;
 548          return (UINT)(LONG)-1;
 549    }
 550
 551    /* Position label inside bounding rectangle according to
 552     * alignment flags. (calculated rect is always left-top aligned).
 553     * If label is aligned to any side - shift label in opposite
 554     * direction to leave extra space for focus rectangle.
 555     */
 556    switch (dtStyle & (DT_CENTER|DT_RIGHT))
 557    {
 558       case DT_LEFT:    r.left++;  r.right++;  break;
 559       case DT_CENTER:  n = r.right - r.left;
 560                        r.left   = rc->left + ((rc->right - rc->left) - n) / 2;
 561                        r.right  = r.left + n; break;
 562       case DT_RIGHT:   n = r.right - r.left;
 563                        r.right  = rc->right - 1;
 564                        r.left   = r.right - n;
 565                        break;
 566    }
 567
 568    switch (dtStyle & (DT_VCENTER|DT_BOTTOM))
 569    {
 570       case DT_TOP:     r.top++;  r.bottom++;  break;
 571       case DT_VCENTER: n = r.bottom - r.top;
 572                        r.top    = rc->top + ((rc->bottom - rc->top) - n) / 2;
 573                        r.bottom = r.top + n;  break;
 574       case DT_BOTTOM:  n = r.bottom - r.top;
 575                        r.bottom = rc->bottom - 1;
 576                        r.top    = r.bottom - n;
 577                        break;
 578    }
 579
 580    *rc = r;
 581    return dtStyle;
 582 }
 583
 584
 585 /**********************************************************************
 586  *       BUTTON_DrawTextCallback
 587  *
 588  *   Callback function used by DrawStateW function.
 589  */
 590 static BOOL CALLBACK BUTTON_DrawTextCallback(HDC hdc, LPARAM lp, WPARAM wp, int cx, int cy)
 591 {
 592    RECT rc;
 593    rc.left = 0;
 594    rc.top = 0;
 595    rc.right = cx;
 596    rc.bottom = cy;
 597
 598    DrawTextW(hdc, (LPCWSTR)lp, -1, &rc, (UINT)wp);
 599    return TRUE;
 600 }
 601
 602
 603 /**********************************************************************
 604  *       BUTTON_DrawLabel
 605  *
 606  *   Common function for drawing button label.
 607  */
 608 static void BUTTON_DrawLabel(HWND hwnd, HDC hdc, UINT dtFlags, RECT *rc)
 609 {
 610    DRAWSTATEPROC lpOutputProc = NULL;
 611    LPARAM lp;
 612    WPARAM wp = 0;
 613    HBRUSH hbr = 0;
 614    UINT flags = IsWindowEnabled(hwnd) ? DSS_NORMAL : DSS_DISABLED;
 615    LONG state = get_button_state( hwnd );
 616    LONG style = GetWindowLongA( hwnd, GWL_STYLE );
 617    WCHAR *text = NULL;
 618
 619    /* Fixme: To draw disabled label in Win31 look-and-feel, we probably
 620     * must use DSS_MONO flag and COLOR_GRAYTEXT brush (or maybe DSS_UNION).
 621     * I don't have Win31 on hand to verify that, so I leave it as is.
 622     */
 623
 624    if ((style & BS_PUSHLIKE) && (state & BUTTON_3STATE))
 625    {
 626       hbr = GetSysColorBrush(COLOR_GRAYTEXT);
 627       flags |= DSS_MONO;
 628    }
 629
 630    switch (style & (BS_ICON|BS_BITMAP))
 631    {
 632       case BS_TEXT:
 633          /* DST_COMPLEX -- is 0 */
 634          lpOutputProc = BUTTON_DrawTextCallback;
 635          if (!(text = get_button_text( hwnd ))) return;
 636          lp = (LPARAM)text;
 637          wp = (WPARAM)dtFlags;
 638          break;
 639
 640       case BS_ICON:
 641          flags |= DST_ICON;
 642          lp = GetWindowLongA( hwnd, HIMAGE_GWL_OFFSET );
 643          break;
 644
 645       case BS_BITMAP:
 646          flags |= DST_BITMAP;
 647          lp = GetWindowLongA( hwnd, HIMAGE_GWL_OFFSET );
 648          break;
 649
 650       default:
 651          return;
 652    }
 653
 654    DrawStateW(hdc, hbr, lpOutputProc, lp, wp, rc->left, rc->top,
 655               rc->right - rc->left, rc->bottom - rc->top, flags);
 656    if (text) HeapFree( GetProcessHeap(), 0, text );
 657 }
 658
 659 /**********************************************************************
 660  *       Push Button Functions
 661  */
 662 static void PB_Paint( HWND hwnd, HDC hDC, UINT action )
 663 {
 664     RECT     rc, focus_rect, r;
 665     UINT     dtFlags;
 666     HRGN     hRgn;
 667     HPEN     hOldPen;
 668     HBRUSH   hOldBrush;
 669     INT      oldBkMode;
 670     COLORREF oldTxtColor;
 671     HFONT hFont;
 672     LONG state = get_button_state( hwnd );
 673     LONG style = GetWindowLongA( hwnd, GWL_STYLE );
 674     BOOL pushedState = (state & BUTTON_HIGHLIGHTED);
 675
 676     GetClientRect( hwnd, &rc );
 677
 678     /* Send WM_CTLCOLOR to allow changing the font (the colors are fixed) */
 679     if ((hFont = get_button_font( hwnd ))) SelectObject( hDC, hFont );
 680     SendMessageW( GetParent(hwnd), WM_CTLCOLORBTN, hDC, hwnd );
 681     hOldPen = (HPEN)SelectObject(hDC, GetSysColorPen(COLOR_WINDOWFRAME));
 682     hOldBrush =(HBRUSH)SelectObject(hDC,GetSysColorBrush(COLOR_BTNFACE));
 683     oldBkMode = SetBkMode(hDC, TRANSPARENT);
 684
 685     if ( TWEAK_WineLook == WIN31_LOOK)
 686     {
 687         COLORREF clr_wnd = GetSysColor(COLOR_WINDOW);
 688         Rectangle(hDC, rc.left, rc.top, rc.right, rc.bottom);
 689
 690         SetPixel( hDC, rc.left, rc.top, clr_wnd);
 691         SetPixel( hDC, rc.left, rc.bottom-1, clr_wnd);
 692         SetPixel( hDC, rc.right-1, rc.top, clr_wnd);
 693         SetPixel( hDC, rc.right-1, rc.bottom-1, clr_wnd);
 694         InflateRect( &rc, -1, -1 );
 695     }
 696
 697     if (get_button_type(style) == BS_DEFPUSHBUTTON)
 698     {
 699         Rectangle(hDC, rc.left, rc.top, rc.right, rc.bottom);
 700         InflateRect( &rc, -1, -1 );
 701     }
 702
 703     if (TWEAK_WineLook == WIN31_LOOK)
 704     {
 705         if (pushedState)
 706         {
 707             /* draw button shadow: */
 708             SelectObject(hDC, GetSysColorBrush(COLOR_BTNSHADOW));
 709             PatBlt(hDC, rc.left, rc.top, 1, rc.bottom-rc.top, PATCOPY );
 710             PatBlt(hDC, rc.left, rc.top, rc.right-rc.left, 1, PATCOPY );
 711         } else {
 712            rc.right++, rc.bottom++;
 713            DrawEdge( hDC, &rc, EDGE_RAISED, BF_RECT );
 714            rc.right--, rc.bottom--;
 715         }
 716     }
 717     else
 718     {
 719         UINT uState = DFCS_BUTTONPUSH | DFCS_ADJUSTRECT;
 720
 721         if (style & BS_FLAT)
 722             uState |= DFCS_MONO;
 723         else if (pushedState)
 724         {
 725             if (get_button_type(style) == BS_DEFPUSHBUTTON )
 726                 uState |= DFCS_FLAT;
 727             else
 728                 uState |= DFCS_PUSHED;
 729         }
 730
 731         if (state & (BUTTON_CHECKED | BUTTON_3STATE))
 732             uState |= DFCS_CHECKED;
 733
 734         DrawFrameControl( hDC, &rc, DFC_BUTTON, uState );
 735
 736         focus_rect = rc;
 737     }
 738
 739     /* draw button label */
 740     r = rc;
 741     dtFlags = BUTTON_CalcLabelRect(hwnd, hDC, &r);
 742
 743     if (dtFlags == (UINT)-1L)
 744        goto cleanup;
 745
 746     if (pushedState)
 747        OffsetRect(&r, 1, 1);
 748
 749     if(TWEAK_WineLook == WIN31_LOOK)
 750     {
 751        focus_rect = r;
 752        InflateRect(&focus_rect, 2, 0);
 753     }
 754
 755     hRgn = CreateRectRgn(rc.left, rc.top, rc.right, rc.bottom);
 756     SelectClipRgn(hDC, hRgn);
 757
 758     oldTxtColor = SetTextColor( hDC, GetSysColor(COLOR_BTNTEXT) );
 759
 760     BUTTON_DrawLabel(hwnd, hDC, dtFlags, &r);
 761
 762     SetTextColor( hDC, oldTxtColor );
 763     SelectClipRgn(hDC, 0);
 764     DeleteObject(hRgn);
 765
 766     if (state & BUTTON_HASFOCUS)
 767     {
 768         InflateRect( &focus_rect, -1, -1 );
 769         IntersectRect(&focus_rect, &focus_rect, &rc);
 770         DrawFocusRect( hDC, &focus_rect );
 771     }
 772
 773  cleanup:
 774     SelectObject( hDC, hOldPen );
 775     SelectObject( hDC, hOldBrush );
 776     SetBkMode(hDC, oldBkMode);
 777 }
 778
 779 /**********************************************************************
 780  *       Check Box & Radio Button Functions
 781  */
 782
 783 static void CB_Paint( HWND hwnd, HDC hDC, UINT action )
 784 {
 785     RECT rbox, rtext, client;
 786     HBRUSH hBrush;
 787     int delta;
 788     UINT dtFlags;
 789     HRGN hRgn;
 790     HFONT hFont;
 791     LONG state = get_button_state( hwnd );
 792     LONG style = GetWindowLongA( hwnd, GWL_STYLE );
 793
 794     if (style & BS_PUSHLIKE)
 795     {
 796         PB_Paint( hwnd, hDC, action );
 797         return;
 798     }
 799
 800     GetClientRect(hwnd, &client);
 801     rbox = rtext = client;
 802
 803     if ((hFont = get_button_font( hwnd ))) SelectObject( hDC, hFont );
 804
 805     /* GetControlBrush16 sends WM_CTLCOLORBTN, plus it returns default brush
 806      * if parent didn't return valid one. So we kill two hares at once
 807      */
 808     hBrush = GetControlBrush16( hwnd, hDC, CTLCOLOR_BTN );
 809
 810     if (style & BS_LEFTTEXT)
 811     {
 812         /* magic +4 is what CTL3D expects */
 813
 814         rtext.right -= checkBoxWidth + 4;
 815         rbox.left = rbox.right - checkBoxWidth;
 816     }
 817     else
 818     {
 819         rtext.left += checkBoxWidth + 4;
 820         rbox.right = checkBoxWidth;
 821     }
 822
 823     /* Draw the check-box bitmap */
 824     if (action == ODA_DRAWENTIRE || action == ODA_SELECT)
 825     {
 826         /* Since WM_ERASEBKGND does nothing, first prepare background */
 827         if (action == ODA_SELECT) FillRect( hDC, &rbox, hBrush );
 828         else FillRect( hDC, &client, hBrush );
 829
 830         if( TWEAK_WineLook == WIN31_LOOK )
 831         {
 832         HDC hMemDC = CreateCompatibleDC( hDC );
 833         int x = 0, y = 0;
 834         delta = (rbox.bottom - rbox.top - checkBoxHeight) / 2;
 835
 836         /* Check in case the client area is smaller than the checkbox bitmap */
 837         if (delta < 0) delta = 0;
 838
 839         if (state & BUTTON_HIGHLIGHTED) x += 2 * checkBoxWidth;
 840         if (state & (BUTTON_CHECKED | BUTTON_3STATE)) x += checkBoxWidth;
 841         if ((get_button_type(style) == BS_RADIOBUTTON) ||
 842             (get_button_type(style) == BS_AUTORADIOBUTTON)) y += checkBoxHeight;
 843         else if (state & BUTTON_3STATE) y += 2 * checkBoxHeight;
 844
 845         /* The bitmap for the radio button is not aligned with the
 846          * left of the window, it is 1 pixel off. */
 847         if ((get_button_type(style) == BS_RADIOBUTTON) ||
 848             (get_button_type(style) == BS_AUTORADIOBUTTON))
 849           rbox.left += 1;
 850
 851         SelectObject( hMemDC, hbitmapCheckBoxes );
 852         BitBlt( hDC, rbox.left, rbox.top + delta, checkBoxWidth,
 853                   checkBoxHeight, hMemDC, x, y, SRCCOPY );
 854         DeleteDC( hMemDC );
 855         }
 856         else
 857         {
 858             UINT flags;
 859
 860             if ((get_button_type(style) == BS_RADIOBUTTON) ||
 861                 (get_button_type(style) == BS_AUTORADIOBUTTON)) flags = DFCS_BUTTONRADIO;
 862             else if (state & BUTTON_3STATE) flags = DFCS_BUTTON3STATE;
 863             else flags = DFCS_BUTTONCHECK;
 864
 865             if (state & (BUTTON_CHECKED | BUTTON_3STATE)) flags |= DFCS_CHECKED;
 866             if (state & BUTTON_HIGHLIGHTED) flags |= DFCS_PUSHED;
 867
 868             if (style & WS_DISABLED) flags |= DFCS_INACTIVE;
 869
 870             /* rbox must have the correct height */
 871             delta = rbox.bottom - rbox.top - checkBoxHeight;
 872             if (delta > 0)
 873             {
 874                 int ofs = (abs(delta) / 2);
 875                 rbox.bottom -= ofs + 1;
 876                 rbox.top = rbox.bottom - checkBoxHeight;
 877             }
 878             else if (delta < 0)
 879             {
 880                 int ofs = (abs(delta) / 2);
 881                 rbox.top -= ofs + 1;
 882                 rbox.bottom = rbox.top + checkBoxHeight;
 883             }
 884
 885             DrawFrameControl( hDC, &rbox, DFC_BUTTON, flags );
 886         }
 887     }
 888
 889     /* Draw label */
 890     client = rtext;
 891     dtFlags = BUTTON_CalcLabelRect(hwnd, hDC, &rtext);
 892
 893     if (dtFlags == (UINT)-1L) /* Noting to draw */
 894         return;
 895     hRgn = CreateRectRgn(client.left, client.top, client.right, client.bottom);
 896     SelectClipRgn(hDC, hRgn);
 897     DeleteObject(hRgn);
 898
 899     if (action == ODA_DRAWENTIRE)
 900         BUTTON_DrawLabel(hwnd, hDC, dtFlags, &rtext);
 901
 902     /* ... and focus */
 903     if ((action == ODA_FOCUS) ||
 904         ((action == ODA_DRAWENTIRE) && (state & BUTTON_HASFOCUS)))
 905     {
 906         rtext.left--;
 907         rtext.right++;
 908         IntersectRect(&rtext, &rtext, &client);
 909         DrawFocusRect( hDC, &rtext );
 910     }
 911     SelectClipRgn(hDC, 0);
 912 }
 913
 914
 915 /**********************************************************************
 916  *       BUTTON_CheckAutoRadioButton
 917  *
 918  * hwnd is checked, uncheck every other auto radio button in group
 919  */
 920 static void BUTTON_CheckAutoRadioButton( HWND hwnd )
 921 {
 922     HWND parent, sibling, start;
 923
 924     parent = GetParent(hwnd);
 925     /* make sure that starting control is not disabled or invisible */
 926     start = sibling = GetNextDlgGroupItem( parent, hwnd, TRUE );
 927     do
 928     {
 929         if (!sibling) break;
 930         if ((hwnd != sibling) &&
 931             ((GetWindowLongA( sibling, GWL_STYLE) & 0x0f) == BS_AUTORADIOBUTTON))
 932             SendMessageW( sibling, BM_SETCHECK, BUTTON_UNCHECKED, 0 );
 933         sibling = GetNextDlgGroupItem( parent, sibling, FALSE );
 934     } while (sibling != start);
 935 }
 936
 937
 938 /**********************************************************************
 939  *       Group Box Functions
 940  */
 941
 942 static void GB_Paint( HWND hwnd, HDC hDC, UINT action )
 943 {
 944     RECT rc, rcFrame;
 945     HBRUSH hbr;
 946     HFONT hFont;
 947     UINT dtFlags;
 948     LONG style = GetWindowLongA( hwnd, GWL_STYLE );
 949
 950     if (action != ODA_DRAWENTIRE) return;
 951
 952     if ((hFont = get_button_font( hwnd ))) SelectObject( hDC, hFont );
 953     /* GroupBox acts like static control, so it sends CTLCOLORSTATIC */
 954     hbr = GetControlBrush16( hwnd, hDC, CTLCOLOR_STATIC );
 955
 956     GetClientRect( hwnd, &rc);
 957     if (TWEAK_WineLook == WIN31_LOOK) {
 958         HPEN hPrevPen = SelectObject( hDC,
 959                                           GetSysColorPen(COLOR_WINDOWFRAME));
 960         HBRUSH hPrevBrush = SelectObject( hDC,
 961                                               GetStockObject(NULL_BRUSH) );
 962
 963         Rectangle( hDC, rc.left, rc.top + 2, rc.right - 1, rc.bottom - 1 );
 964         SelectObject( hDC, hPrevBrush );
 965         SelectObject( hDC, hPrevPen );
 966     } else {
 967         TEXTMETRICW tm;
 968         rcFrame = rc;
 969
 970         GetTextMetricsW (hDC, &tm);
 971         rcFrame.top += (tm.tmHeight / 2) - 1;
 972         DrawEdge (hDC, &rcFrame, EDGE_ETCHED, BF_RECT | ((style & BS_FLAT) ? BF_FLAT : 0));
 973     }
 974
 975     InflateRect(&rc, -7, 1);
 976     dtFlags = BUTTON_CalcLabelRect(hwnd, hDC, &rc);
 977
 978     if (dtFlags == (UINT)-1L)
 979        return;
 980
 981     /* Because buttons have CS_PARENTDC class style, there is a chance
 982      * that label will be drawn out of client rect.
 983      * But Windows doesn't clip label's rect, so do I.
 984      */
 985
 986     /* There is 1-pixel marging at the left, right, and bottom */
 987     rc.left--; rc.right++; rc.bottom++;
 988     FillRect(hDC, &rc, hbr);
 989     rc.left++; rc.right--; rc.bottom--;
 990
 991     BUTTON_DrawLabel(hwnd, hDC, dtFlags, &rc);
 992 }
 993
 994
 995 /**********************************************************************
 996  *       User Button Functions
 997  */
 998
 999 static void UB_Paint( HWND hwnd, HDC hDC, UINT action )
1000 {
1001     RECT rc;
1002     HBRUSH hBrush;
1003     HFONT hFont;
1004     LONG state = get_button_state( hwnd );
1005
1006     if (action == ODA_SELECT) return;
1007
1008     GetClientRect( hwnd, &rc);
1009
1010     if ((hFont = get_button_font( hwnd ))) SelectObject( hDC, hFont );
1011     hBrush = GetControlBrush16( hwnd, hDC, CTLCOLOR_BTN );
1012
1013     FillRect( hDC, &rc, hBrush );
1014     if ((action == ODA_FOCUS) ||
1015         ((action == ODA_DRAWENTIRE) && (state & BUTTON_HASFOCUS)))
1016         DrawFocusRect( hDC, &rc );
1017 }
1018
1019
1020 /**********************************************************************
1021  *       Ownerdrawn Button Functions
1022  */
1023
1024 static void OB_Paint( HWND hwnd, HDC hDC, UINT action )
1025 {
1026     LONG state = get_button_state( hwnd );
1027     DRAWITEMSTRUCT dis;
1028     HRGN clipRegion;
1029     RECT clipRect;
1030     UINT id = GetWindowLongA( hwnd, GWL_ID );
1031
1032     dis.CtlType    = ODT_BUTTON;
1033     dis.CtlID      = id;
1034     dis.itemID     = 0;
1035     dis.itemAction = action;
1036     dis.itemState  = ((state & BUTTON_HASFOCUS) ? ODS_FOCUS : 0) |
1037                      ((state & BUTTON_HIGHLIGHTED) ? ODS_SELECTED : 0) |
1038                      (IsWindowEnabled(hwnd) ? 0: ODS_DISABLED);
1039     dis.hwndItem   = hwnd;
1040     dis.hDC        = hDC;
1041     dis.itemData   = 0;
1042     GetClientRect( hwnd, &dis.rcItem );
1043
1044     clipRegion = CreateRectRgnIndirect(&dis.rcItem);
1045     if (GetClipRgn(hDC, clipRegion) != 1)
1046     {
1047         DeleteObject(clipRegion);
1048         clipRegion=(HRGN)NULL;
1049     }
1050     clipRect = dis.rcItem;
1051     DPtoLP(hDC, (LPPOINT) &clipRect, 2);
1052     IntersectClipRect(hDC, clipRect.left,  clipRect.top, clipRect.right, clipRect.bottom);
1053
1054     SetBkColor( hDC, GetSysColor( COLOR_BTNFACE ) );
1055     SendMessageW( GetParent(hwnd), WM_DRAWITEM, id, (LPARAM)&dis );
1056     SelectClipRgn(hDC, clipRegion);
1057 }
1058