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  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include <stdarg.h>
  23 #include <string.h>
  24 #include <stdlib.h>
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "wingdi.h"
  29 #include "wine/winuser16.h"
  30 #include "controls.h"
  31 #include "user.h"
  32
  33 /* GetWindowLong offsets for window extra information */
  34 #define STATE_GWL_OFFSET  0
  35 #define HFONT_GWL_OFFSET  (sizeof(LONG))
  36 #define HIMAGE_GWL_OFFSET (2*sizeof(LONG))
  37 #define NB_EXTRA_BYTES    (3*sizeof(LONG))
  38
  39   /* Button state values */
  40 #define BUTTON_UNCHECKED       0x00
  41 #define BUTTON_CHECKED         0x01
  42 #define BUTTON_3STATE          0x02
  43 #define BUTTON_HIGHLIGHTED     0x04
  44 #define BUTTON_HASFOCUS        0x08
  45 #define BUTTON_NSTATES         0x0F
  46   /* undocumented flags */
  47 #define BUTTON_BTNPRESSED      0x40
  48 #define BUTTON_UNKNOWN2        0x20
  49 #define BUTTON_UNKNOWN3        0x10
  50
  51 static UINT BUTTON_CalcLabelRect( HWND hwnd, HDC hdc, RECT *rc );
  52 static void PB_Paint( HWND hwnd, HDC hDC, UINT action );
  53 static void CB_Paint( HWND hwnd, HDC hDC, UINT action );
  54 static void GB_Paint( HWND hwnd, HDC hDC, UINT action );
  55 static void UB_Paint( HWND hwnd, HDC hDC, UINT action );
  56 static void OB_Paint( HWND hwnd, HDC hDC, UINT action );
  57 static void BUTTON_CheckAutoRadioButton( HWND hwnd );
  58 static LRESULT WINAPI ButtonWndProcA( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
  59 static LRESULT WINAPI ButtonWndProcW( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
  60
  61 #define MAX_BTN_TYPE  12
  62
  63 static const WORD maxCheckState[MAX_BTN_TYPE] =
  64 {
  65     BUTTON_UNCHECKED,   /* BS_PUSHBUTTON */
  66     BUTTON_UNCHECKED,   /* BS_DEFPUSHBUTTON */
  67     BUTTON_CHECKED,     /* BS_CHECKBOX */
  68     BUTTON_CHECKED,     /* BS_AUTOCHECKBOX */
  69     BUTTON_CHECKED,     /* BS_RADIOBUTTON */
  70     BUTTON_3STATE,      /* BS_3STATE */
  71     BUTTON_3STATE,      /* BS_AUTO3STATE */
  72     BUTTON_UNCHECKED,   /* BS_GROUPBOX */
  73     BUTTON_UNCHECKED,   /* BS_USERBUTTON */
  74     BUTTON_CHECKED,     /* BS_AUTORADIOBUTTON */
  75     BUTTON_UNCHECKED,   /* Not defined */
  76     BUTTON_UNCHECKED    /* BS_OWNERDRAW */
  77 };
  78
  79 typedef void (*pfPaint)( HWND hwnd, HDC hdc, UINT action );
  80
  81 static const pfPaint btnPaintFunc[MAX_BTN_TYPE] =
  82 {
  83     PB_Paint,    /* BS_PUSHBUTTON */
  84     PB_Paint,    /* BS_DEFPUSHBUTTON */
  85     CB_Paint,    /* BS_CHECKBOX */
  86     CB_Paint,    /* BS_AUTOCHECKBOX */
  87     CB_Paint,    /* BS_RADIOBUTTON */
  88     CB_Paint,    /* BS_3STATE */
  89     CB_Paint,    /* BS_AUTO3STATE */
  90     GB_Paint,    /* BS_GROUPBOX */
  91     UB_Paint,    /* BS_USERBUTTON */
  92     CB_Paint,    /* BS_AUTORADIOBUTTON */
  93     NULL,        /* Not defined */
  94     OB_Paint     /* BS_OWNERDRAW */
  95 };
  96
  97 static HBITMAP hbitmapCheckBoxes = 0;
  98 static WORD checkBoxWidth = 0, checkBoxHeight = 0;
  99
 100
 101 /*********************************************************************
 102  * button class descriptor
 103  */
 104 const struct builtin_class_descr BUTTON_builtin_class =
 105 {
 106     "Button",            /* name */
 107     CS_DBLCLKS | CS_VREDRAW | CS_HREDRAW | CS_PARENTDC, /* style  */
 108     ButtonWndProcA,      /* procA */
 109     ButtonWndProcW,      /* procW */
 110     NB_EXTRA_BYTES,      /* extra */
 111     IDC_ARROW,           /* cursor */
 112     0                    /* brush */
 113 };
 114
 115
 116 inline static LONG get_button_state( HWND hwnd )
 117 {
 118     return GetWindowLongA( hwnd, STATE_GWL_OFFSET );
 119 }
 120
 121 inline static void set_button_state( HWND hwnd, LONG state )
 122 {
 123     SetWindowLongA( hwnd, STATE_GWL_OFFSET, state );
 124 }
 125
 126 inline static HFONT get_button_font( HWND hwnd )
 127 {
 128     return (HFONT)GetWindowLongA( hwnd, HFONT_GWL_OFFSET );
 129 }
 130
 131 inline static void set_button_font( HWND hwnd, HFONT font )
 132 {
 133     SetWindowLongA( hwnd, HFONT_GWL_OFFSET, (LONG)font );
 134 }
 135
 136 inline static UINT get_button_type( LONG window_style )
 137 {
 138     return (window_style & 0x0f);
 139 }
 140
 141 /* paint a button of any type */
 142 inline static void paint_button( HWND hwnd, LONG style, UINT action )
 143 {
 144     if (btnPaintFunc[style] && IsWindowVisible(hwnd))
 145     {
 146         HDC hdc = GetDC( hwnd );
 147         btnPaintFunc[style]( hwnd, hdc, action );
 148         ReleaseDC( hwnd, hdc );
 149     }
 150 }
 151
 152 /* retrieve the button text; returned buffer must be freed by caller */
 153 inline static WCHAR *get_button_text( HWND hwnd )
 154 {
 155     INT len = GetWindowTextLengthW( hwnd );
 156     WCHAR *buffer = HeapAlloc( GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR) );
 157     if (buffer) GetWindowTextW( hwnd, buffer, len + 1 );
 158     return buffer;
 159 }
 160
 161 /***********************************************************************
 162  *           ButtonWndProc_common
 163  */
 164 static LRESULT WINAPI ButtonWndProc_common(HWND hWnd, UINT uMsg,
 165                                            WPARAM wParam, LPARAM lParam, BOOL unicode )
 166 {
 167     RECT rect;
 168     POINT pt;
 169     LONG style = GetWindowLongA( hWnd, GWL_STYLE );
 170     UINT btn_type = get_button_type( style );
 171     LONG state;
 172     HANDLE oldHbitmap;
 173
 174     pt.x = LOWORD(lParam);
 175     pt.y = HIWORD(lParam);
 176
 177     switch (uMsg)
 178     {
 179     case WM_GETDLGCODE:
 180         switch(btn_type)
 181         {
 182         case BS_PUSHBUTTON:      return DLGC_BUTTON | DLGC_UNDEFPUSHBUTTON;
 183         case BS_DEFPUSHBUTTON:   return DLGC_BUTTON | DLGC_DEFPUSHBUTTON;
 184         case BS_RADIOBUTTON:
 185         case BS_AUTORADIOBUTTON: return DLGC_BUTTON | DLGC_RADIOBUTTON;
 186         default:                 return DLGC_BUTTON;
 187         }
 188
 189     case WM_ENABLE:
 190         paint_button( hWnd, btn_type, ODA_DRAWENTIRE );
 191         break;
 192
 193     case WM_CREATE:
 194         if (!hbitmapCheckBoxes)
 195         {
 196             BITMAP bmp;
 197             hbitmapCheckBoxes = LoadBitmapW(0, MAKEINTRESOURCEW(OBM_CHECKBOXES));
 198             GetObjectW( hbitmapCheckBoxes, sizeof(bmp), &bmp );
 199             checkBoxWidth  = bmp.bmWidth / 4;
 200             checkBoxHeight = bmp.bmHeight / 3;
 201         }
 202         if (btn_type >= MAX_BTN_TYPE)
 203             return -1; /* abort */
 204         set_button_state( hWnd, BUTTON_UNCHECKED );
 205         return 0;
 206
 207     case WM_ERASEBKGND:
 208         if (btn_type == BS_OWNERDRAW)
 209         {
 210             HDC hdc = (HDC)wParam;
 211             RECT rc;
 212             HBRUSH hBrush = (HBRUSH)SendMessageW(GetParent(hWnd), WM_CTLCOLORBTN, (WPARAM)hdc, (LPARAM)hWnd);
 213             if (!hBrush) /* did the app forget to call defwindowproc ? */
 214                 hBrush = (HBRUSH)DefWindowProcW(GetParent(hWnd), WM_CTLCOLORBTN,
 215                                                 (WPARAM)hdc, (LPARAM)hWnd);
 216             GetClientRect(hWnd, &rc);
 217             FillRect(hdc, &rc, hBrush);
 218         }
 219         return 1;
 220
 221     case WM_PAINT:
 222         if (btnPaintFunc[btn_type])
 223         {
 224             PAINTSTRUCT ps;
 225             HDC hdc = wParam ? (HDC)wParam : BeginPaint( hWnd, &ps );
 226             int nOldMode = SetBkMode( hdc, OPAQUE );
 227             (btnPaintFunc[btn_type])( hWnd, hdc, ODA_DRAWENTIRE );
 228             SetBkMode(hdc, nOldMode); /*  reset painting mode */
 229             if( !wParam ) EndPaint( hWnd, &ps );
 230         }
 231         break;
 232
 233     case WM_KEYDOWN:
 234         if (wParam == VK_SPACE)
 235         {
 236             SendMessageW( hWnd, BM_SETSTATE, TRUE, 0 );
 237             set_button_state( hWnd, get_button_state( hWnd ) | BUTTON_BTNPRESSED );
 238         }
 239         break;
 240
 241     case WM_LBUTTONDBLCLK:
 242         if(style & BS_NOTIFY ||
 243            btn_type == BS_RADIOBUTTON ||
 244            btn_type == BS_USERBUTTON ||
 245            btn_type == BS_OWNERDRAW)
 246         {
 247             SendMessageW( GetParent(hWnd), WM_COMMAND,
 248                           MAKEWPARAM( GetWindowLongA(hWnd,GWL_ID), BN_DOUBLECLICKED ),
 249                           (LPARAM)hWnd);
 250             break;
 251         }
 252         /* fall through */
 253     case WM_LBUTTONDOWN:
 254         SetCapture( hWnd );
 255         SetFocus( hWnd );
 256         SendMessageW( hWnd, BM_SETSTATE, TRUE, 0 );
 257         set_button_state( hWnd, get_button_state( hWnd ) | BUTTON_BTNPRESSED );
 258         break;
 259
 260     case WM_KEYUP:
 261         if (wParam != VK_SPACE)
 262             break;
 263         /* fall through */
 264     case WM_LBUTTONUP:
 265         state = get_button_state( hWnd );
 266         if (!(state & BUTTON_BTNPRESSED)) break;
 267         state &= BUTTON_NSTATES;
 268         set_button_state( hWnd, state );
 269         if (!(state & BUTTON_HIGHLIGHTED))
 270         {
 271             ReleaseCapture();
 272             break;
 273         }
 274         SendMessageW( hWnd, BM_SETSTATE, FALSE, 0 );
 275         ReleaseCapture();
 276         GetClientRect( hWnd, &rect );
 277         if (uMsg == WM_KEYUP || PtInRect( &rect, pt ))
 278         {
 279             state = get_button_state( hWnd );
 280             switch(btn_type)
 281             {
 282             case BS_AUTOCHECKBOX:
 283                 SendMessageW( hWnd, BM_SETCHECK, !(state & BUTTON_CHECKED), 0 );
 284                 break;
 285             case BS_AUTORADIOBUTTON:
 286                 SendMessageW( hWnd, BM_SETCHECK, TRUE, 0 );
 287                 break;
 288             case BS_AUTO3STATE:
 289                 SendMessageW( hWnd, BM_SETCHECK,
 290                                 (state & BUTTON_3STATE) ? 0 : ((state & 3) + 1), 0 );
 291                 break;
 292             }
 293             SendMessageW( GetParent(hWnd), WM_COMMAND,
 294                           MAKEWPARAM( GetWindowLongA(hWnd,GWL_ID), BN_CLICKED ), (LPARAM)hWnd);
 295         }
 296         break;
 297
 298     case WM_CAPTURECHANGED:
 299         state = get_button_state( hWnd );
 300         if (state & BUTTON_BTNPRESSED)
 301         {
 302             state &= BUTTON_NSTATES;
 303             set_button_state( hWnd, state );
 304             if (state & BUTTON_HIGHLIGHTED) SendMessageW( hWnd, BM_SETSTATE, FALSE, 0 );
 305         }
 306         break;
 307
 308     case WM_MOUSEMOVE:
 309         if ((wParam & MK_LBUTTON) && GetCapture() == hWnd)
 310         {
 311             GetClientRect( hWnd, &rect );
 312             SendMessageW( hWnd, BM_SETSTATE, PtInRect(&rect, pt), 0 );
 313         }
 314         break;
 315
 316     case WM_SETTEXT:
 317     {
 318         /* Clear an old text here as Windows does */
 319         HDC hdc = GetDC(hWnd);
 320         HBRUSH hbrush;
 321         RECT client, rc;
 322
 323         hbrush = (HBRUSH)SendMessageW(GetParent(hWnd), WM_CTLCOLORSTATIC,
 324                                       (WPARAM)hdc, (LPARAM)hWnd);
 325         if (!hbrush) /* did the app forget to call DefWindowProc ? */
 326             hbrush = (HBRUSH)DefWindowProcW(GetParent(hWnd), WM_CTLCOLORSTATIC,
 327                                             (WPARAM)hdc, (LPARAM)hWnd);
 328
 329         GetClientRect(hWnd, &client);
 330         rc = client;
 331         BUTTON_CalcLabelRect(hWnd, hdc, &rc);
 332         /* Clip by client rect bounds */
 333         if (rc.right > client.right) rc.right = client.right;
 334         if (rc.bottom > client.bottom) rc.bottom = client.bottom;
 335         FillRect(hdc, &rc, hbrush);
 336         ReleaseDC(hWnd, hdc);
 337
 338         if (unicode) DefWindowProcW( hWnd, WM_SETTEXT, wParam, lParam );
 339         else DefWindowProcA( hWnd, WM_SETTEXT, wParam, lParam );
 340         if (btn_type == BS_GROUPBOX) /* Yes, only for BS_GROUPBOX */
 341             InvalidateRect( hWnd, NULL, TRUE );
 342         else
 343             paint_button( hWnd, btn_type, ODA_DRAWENTIRE );
 344         return 1; /* success. FIXME: check text length */
 345     }
 346
 347     case WM_SETFONT:
 348         set_button_font( hWnd, (HFONT)wParam );
 349         if (lParam) paint_button( hWnd, btn_type, ODA_DRAWENTIRE );
 350         break;
 351
 352     case WM_GETFONT:
 353         return (LRESULT)get_button_font( hWnd );
 354
 355     case WM_SETFOCUS:
 356         if ((btn_type == BS_RADIOBUTTON || btn_type == BS_AUTORADIOBUTTON) && (GetCapture() != hWnd) &&
 357             !(SendMessageW(hWnd, BM_GETCHECK, 0, 0) & BST_CHECKED))
 358         {
 359             /* The notification is sent when the button (BS_AUTORADIOBUTTON)
 360                is unchecked and the focus was not given by a mouse click. */
 361             if (btn_type == BS_AUTORADIOBUTTON)
 362                 SendMessageW( hWnd, BM_SETCHECK, BUTTON_CHECKED, 0 );
 363             SendMessageW( GetParent(hWnd), WM_COMMAND,
 364                           MAKEWPARAM( GetWindowLongA(hWnd,GWL_ID), BN_CLICKED ), (LPARAM)hWnd);
 365         }
 366         set_button_state( hWnd, get_button_state(hWnd) | BUTTON_HASFOCUS );
 367         paint_button( hWnd, btn_type, ODA_FOCUS );
 368         break;
 369
 370     case WM_KILLFOCUS:
 371         set_button_state( hWnd, get_button_state(hWnd) & ~BUTTON_HASFOCUS );
 372         paint_button( hWnd, btn_type, ODA_FOCUS );
 373         InvalidateRect( hWnd, NULL, TRUE );
 374         break;
 375
 376     case WM_SYSCOLORCHANGE:
 377         InvalidateRect( hWnd, NULL, FALSE );
 378         break;
 379
 380     case BM_SETSTYLE16:
 381     case BM_SETSTYLE:
 382         if ((wParam & 0x0f) >= MAX_BTN_TYPE) break;
 383         btn_type = wParam & 0x0f;
 384         style = (style & ~0x0f) | btn_type;
 385         SetWindowLongA( hWnd, GWL_STYLE, style );
 386
 387         /* Only redraw if lParam flag is set.*/
 388         if (lParam)
 389            paint_button( hWnd, btn_type, ODA_DRAWENTIRE );
 390
 391         break;
 392
 393     case BM_CLICK:
 394         SendMessageW( hWnd, WM_LBUTTONDOWN, 0, 0 );
 395         SendMessageW( hWnd, WM_LBUTTONUP, 0, 0 );
 396         break;
 397
 398     case BM_SETIMAGE:
 399         /* Check that image format matches button style */
 400         switch (style & (BS_BITMAP|BS_ICON))
 401         {
 402         case BS_BITMAP:
 403             if (wParam != IMAGE_BITMAP) return 0;
 404             break;
 405         case BS_ICON:
 406             if (wParam != IMAGE_ICON) return 0;
 407             break;
 408         default:
 409             return 0;
 410         }
 411         oldHbitmap = (HBITMAP)SetWindowLongA( hWnd, HIMAGE_GWL_OFFSET, lParam );
 412         InvalidateRect( hWnd, NULL, FALSE );
 413         return (LRESULT)oldHbitmap;
 414
 415     case BM_GETIMAGE:
 416         return GetWindowLongA( hWnd, HIMAGE_GWL_OFFSET );
 417
 418     case BM_GETCHECK16:
 419     case BM_GETCHECK:
 420         return get_button_state( hWnd ) & 3;
 421
 422     case BM_SETCHECK16:
 423     case BM_SETCHECK:
 424         if (wParam > maxCheckState[btn_type]) wParam = maxCheckState[btn_type];
 425         state = get_button_state( hWnd );
 426         if ((btn_type == BS_RADIOBUTTON) || (btn_type == BS_AUTORADIOBUTTON))
 427         {
 428             if (wParam) style |= WS_TABSTOP;
 429             else style &= ~WS_TABSTOP;
 430             SetWindowLongA( hWnd, GWL_STYLE, style );
 431         }
 432         if ((state & 3) != wParam)
 433         {
 434             set_button_state( hWnd, (state & ~3) | wParam );
 435             paint_button( hWnd, btn_type, ODA_SELECT );
 436         }
 437         if ((btn_type == BS_AUTORADIOBUTTON) && (wParam == BUTTON_CHECKED) && (style & WS_CHILD))
 438             BUTTON_CheckAutoRadioButton( hWnd );
 439         break;
 440
 441     case BM_GETSTATE16:
 442     case BM_GETSTATE:
 443         return get_button_state( hWnd );
 444
 445     case BM_SETSTATE16:
 446     case BM_SETSTATE:
 447         state = get_button_state( hWnd );
 448         if (wParam)
 449         {
 450             if (state & BUTTON_HIGHLIGHTED) break;
 451             set_button_state( hWnd, state | BUTTON_HIGHLIGHTED );
 452         }
 453         else
 454         {
 455             if (!(state & BUTTON_HIGHLIGHTED)) break;
 456             set_button_state( hWnd, state & ~BUTTON_HIGHLIGHTED );
 457         }
 458         paint_button( hWnd, btn_type, ODA_SELECT );
 459         break;
 460
 461     case WM_NCHITTEST:
 462         if(btn_type == BS_GROUPBOX) return HTTRANSPARENT;
 463         /* fall through */
 464     default:
 465         return unicode ? DefWindowProcW(hWnd, uMsg, wParam, lParam) :
 466                          DefWindowProcA(hWnd, uMsg, wParam, lParam);
 467     }
 468     return 0;
 469 }
 470
 471 /***********************************************************************
 472  *           ButtonWndProcW
 473  * The button window procedure. This is just a wrapper which locks
 474  * the passed HWND and calls the real window procedure (with a WND*
 475  * pointer pointing to the locked windowstructure).
 476  */
 477 static LRESULT WINAPI ButtonWndProcW( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
 478 {
 479     if (!IsWindow( hWnd )) return 0;
 480     return ButtonWndProc_common( hWnd, uMsg, wParam, lParam, TRUE );
 481 }
 482
 483
 484 /***********************************************************************
 485  *           ButtonWndProcA
 486  */
 487 static LRESULT WINAPI ButtonWndProcA( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
 488 {
 489     if (!IsWindow( hWnd )) return 0;
 490     return ButtonWndProc_common( hWnd, uMsg, wParam, lParam, FALSE );
 491 }
 492
 493
 494 /**********************************************************************
 495  * Convert button styles to flags used by DrawText.
 496  * TODO: handle WS_EX_RIGHT extended style.
 497  */
 498 static UINT BUTTON_BStoDT(DWORD style)
 499 {
 500    UINT dtStyle = DT_NOCLIP;  /* We use SelectClipRgn to limit output */
 501
 502    /* "Convert" pushlike buttons to pushbuttons */
 503    if (style & BS_PUSHLIKE)
 504       style &= ~0x0F;
 505
 506    if (!(style & BS_MULTILINE))
 507       dtStyle |= DT_SINGLELINE;
 508    else
 509       dtStyle |= DT_WORDBREAK;
 510
 511    switch (style & BS_CENTER)
 512    {
 513       case BS_LEFT:   /* DT_LEFT is 0 */    break;
 514       case BS_RIGHT:  dtStyle |= DT_RIGHT;  break;
 515       case BS_CENTER: dtStyle |= DT_CENTER; break;
 516       default:
 517          /* Pushbutton's text is centered by default */
 518          if (get_button_type(style) <= BS_DEFPUSHBUTTON) dtStyle |= DT_CENTER;
 519          /* all other flavours have left aligned text */
 520    }
 521
 522    /* DrawText ignores vertical alignment for multiline text,
 523     * but we use these flags to align label manualy.
 524     */
 525    if (get_button_type(style) != BS_GROUPBOX)
 526    {
 527       switch (style & BS_VCENTER)
 528       {
 529          case BS_TOP:     /* DT_TOP is 0 */      break;
 530          case BS_BOTTOM:  dtStyle |= DT_BOTTOM;  break;
 531          case BS_VCENTER: /* fall through */
 532          default:         dtStyle |= DT_VCENTER; break;
 533       }
 534    }
 535    else
 536       /* GroupBox's text is always single line and is top aligned. */
 537       dtStyle |= DT_SINGLELINE;
 538
 539    return dtStyle;
 540 }
 541
 542 /**********************************************************************
 543  *       BUTTON_CalcLabelRect
 544  *
 545  *   Calculates label's rectangle depending on button style.
 546  *
 547  * Returns flags to be passed to DrawText.
 548  * Calculated rectangle doesn't take into account button state
 549  * (pushed, etc.). If there is nothing to draw (no text/image) output
 550  * rectangle is empty, and return value is (UINT)-1.
 551  */
 552 static UINT BUTTON_CalcLabelRect(HWND hwnd, HDC hdc, RECT *rc)
 553 {
 554    LONG style = GetWindowLongA( hwnd, GWL_STYLE );
 555    WCHAR *text;
 556    ICONINFO    iconInfo;
 557    BITMAP      bm;
 558    UINT        dtStyle = BUTTON_BStoDT(style);
 559    RECT        r = *rc;
 560    INT         n;
 561
 562    /* Calculate label rectangle according to label type */
 563    switch (style & (BS_ICON|BS_BITMAP))
 564    {
 565       case BS_TEXT:
 566           if (!(text = get_button_text( hwnd ))) goto empty_rect;
 567           if (!text[0])
 568           {
 569               HeapFree( GetProcessHeap(), 0, text );
 570               goto empty_rect;
 571           }
 572           DrawTextW(hdc, text, -1, &r, dtStyle | DT_CALCRECT);
 573           HeapFree( GetProcessHeap(), 0, text );
 574           break;
 575
 576       case BS_ICON:
 577          if (!GetIconInfo((HICON)GetWindowLongA( hwnd, HIMAGE_GWL_OFFSET ), &iconInfo))
 578             goto empty_rect;
 579
 580          GetObjectW (iconInfo.hbmColor, sizeof(BITMAP), &bm);
 581
 582          r.right  = r.left + bm.bmWidth;
 583          r.bottom = r.top  + bm.bmHeight;
 584
 585          DeleteObject(iconInfo.hbmColor);
 586          DeleteObject(iconInfo.hbmMask);
 587          break;
 588
 589       case BS_BITMAP:
 590          if (!GetObjectW( (HANDLE)GetWindowLongA( hwnd, HIMAGE_GWL_OFFSET ), sizeof(BITMAP), &bm))
 591             goto empty_rect;
 592
 593          r.right  = r.left + bm.bmWidth;
 594          r.bottom = r.top  + bm.bmHeight;
 595          break;
 596
 597       default:
 598       empty_rect:
 599          r.right = r.left;
 600          r.bottom = r.top;
 601          return (UINT)(LONG)-1;
 602    }
 603
 604    /* Position label inside bounding rectangle according to
 605     * alignment flags. (calculated rect is always left-top aligned).
 606     * If label is aligned to any side - shift label in opposite
 607     * direction to leave extra space for focus rectangle.
 608     */
 609    switch (dtStyle & (DT_CENTER|DT_RIGHT))
 610    {
 611       case DT_LEFT:    r.left++;  r.right++;  break;
 612       case DT_CENTER:  n = r.right - r.left;
 613                        r.left   = rc->left + ((rc->right - rc->left) - n) / 2;
 614                        r.right  = r.left + n; break;
 615       case DT_RIGHT:   n = r.right - r.left;
 616                        r.right  = rc->right - 1;
 617                        r.left   = r.right - n;
 618                        break;
 619    }
 620
 621    switch (dtStyle & (DT_VCENTER|DT_BOTTOM))
 622    {
 623       case DT_TOP:     r.top++;  r.bottom++;  break;
 624       case DT_VCENTER: n = r.bottom - r.top;
 625                        r.top    = rc->top + ((rc->bottom - rc->top) - n) / 2;
 626                        r.bottom = r.top + n;  break;
 627       case DT_BOTTOM:  n = r.bottom - r.top;
 628                        r.bottom = rc->bottom - 1;
 629                        r.top    = r.bottom - n;
 630                        break;
 631    }
 632
 633    *rc = r;
 634    return dtStyle;
 635 }
 636
 637
 638 /**********************************************************************
 639  *       BUTTON_DrawTextCallback
 640  *
 641  *   Callback function used by DrawStateW function.
 642  */
 643 static BOOL CALLBACK BUTTON_DrawTextCallback(HDC hdc, LPARAM lp, WPARAM wp, int cx, int cy)
 644 {
 645    RECT rc;
 646    rc.left = 0;
 647    rc.top = 0;
 648    rc.right = cx;
 649    rc.bottom = cy;
 650
 651    DrawTextW(hdc, (LPCWSTR)lp, -1, &rc, (UINT)wp);
 652    return TRUE;
 653 }
 654
 655
 656 /**********************************************************************
 657  *       BUTTON_DrawLabel
 658  *
 659  *   Common function for drawing button label.
 660  */
 661 static void BUTTON_DrawLabel(HWND hwnd, HDC hdc, UINT dtFlags, RECT *rc)
 662 {
 663    DRAWSTATEPROC lpOutputProc = NULL;
 664    LPARAM lp;
 665    WPARAM wp = 0;
 666    HBRUSH hbr = 0;
 667    UINT flags = IsWindowEnabled(hwnd) ? DSS_NORMAL : DSS_DISABLED;
 668    LONG state = get_button_state( hwnd );
 669    LONG style = GetWindowLongA( hwnd, GWL_STYLE );
 670    WCHAR *text = NULL;
 671
 672    /* FIXME: To draw disabled label in Win31 look-and-feel, we probably
 673     * must use DSS_MONO flag and COLOR_GRAYTEXT brush (or maybe DSS_UNION).
 674     * I don't have Win31 on hand to verify that, so I leave it as is.
 675     */
 676
 677    if ((style & BS_PUSHLIKE) && (state & BUTTON_3STATE))
 678    {
 679       hbr = GetSysColorBrush(COLOR_GRAYTEXT);
 680       flags |= DSS_MONO;
 681    }
 682
 683    switch (style & (BS_ICON|BS_BITMAP))
 684    {
 685       case BS_TEXT:
 686          /* DST_COMPLEX -- is 0 */
 687          lpOutputProc = BUTTON_DrawTextCallback;
 688          if (!(text = get_button_text( hwnd ))) return;
 689          lp = (LPARAM)text;
 690          wp = (WPARAM)dtFlags;
 691          break;
 692
 693       case BS_ICON:
 694          flags |= DST_ICON;
 695          lp = GetWindowLongA( hwnd, HIMAGE_GWL_OFFSET );
 696          break;
 697
 698       case BS_BITMAP:
 699          flags |= DST_BITMAP;
 700          lp = GetWindowLongA( hwnd, HIMAGE_GWL_OFFSET );
 701          break;
 702
 703       default:
 704          return;
 705    }
 706
 707    DrawStateW(hdc, hbr, lpOutputProc, lp, wp, rc->left, rc->top,
 708               rc->right - rc->left, rc->bottom - rc->top, flags);
 709    if (text) HeapFree( GetProcessHeap(), 0, text );
 710 }
 711
 712 /**********************************************************************
 713  *       Push Button Functions
 714  */
 715 static void PB_Paint( HWND hwnd, HDC hDC, UINT action )
 716 {
 717     RECT     rc, focus_rect, r;
 718     UINT     dtFlags, uState;
 719     HRGN     hRgn;
 720     HPEN     hOldPen;
 721     HBRUSH   hOldBrush;
 722     INT      oldBkMode;
 723     COLORREF oldTxtColor;
 724     HFONT hFont;
 725     LONG state = get_button_state( hwnd );
 726     LONG style = GetWindowLongA( hwnd, GWL_STYLE );
 727     BOOL pushedState = (state & BUTTON_HIGHLIGHTED);
 728
 729     GetClientRect( hwnd, &rc );
 730
 731     /* Send WM_CTLCOLOR to allow changing the font (the colors are fixed) */
 732     if ((hFont = get_button_font( hwnd ))) SelectObject( hDC, hFont );
 733     SendMessageW( GetParent(hwnd), WM_CTLCOLORBTN, (WPARAM)hDC, (LPARAM)hwnd );
 734     hOldPen = (HPEN)SelectObject(hDC, SYSCOLOR_GetPen(COLOR_WINDOWFRAME));
 735     hOldBrush =(HBRUSH)SelectObject(hDC,GetSysColorBrush(COLOR_BTNFACE));
 736     oldBkMode = SetBkMode(hDC, TRANSPARENT);
 737
 738     if (get_button_type(style) == BS_DEFPUSHBUTTON)
 739     {
 740         Rectangle(hDC, rc.left, rc.top, rc.right, rc.bottom);
 741         InflateRect( &rc, -1, -1 );
 742     }
 743
 744     uState = DFCS_BUTTONPUSH | DFCS_ADJUSTRECT;
 745
 746     if (style & BS_FLAT)
 747         uState |= DFCS_MONO;
 748     else if (pushedState)
 749     {
 750         if (get_button_type(style) == BS_DEFPUSHBUTTON )
 751             uState |= DFCS_FLAT;
 752         else
 753             uState |= DFCS_PUSHED;
 754     }
 755
 756     if (state & (BUTTON_CHECKED | BUTTON_3STATE))
 757         uState |= DFCS_CHECKED;
 758
 759     DrawFrameControl( hDC, &rc, DFC_BUTTON, uState );
 760
 761     focus_rect = rc;
 762
 763     /* draw button label */
 764     r = rc;
 765     dtFlags = BUTTON_CalcLabelRect(hwnd, hDC, &r);
 766
 767     if (dtFlags == (UINT)-1L)
 768        goto cleanup;
 769
 770     if (pushedState)
 771        OffsetRect(&r, 1, 1);
 772
 773     hRgn = CreateRectRgn(rc.left, rc.top, rc.right, rc.bottom);
 774     SelectClipRgn(hDC, hRgn);
 775
 776     oldTxtColor = SetTextColor( hDC, GetSysColor(COLOR_BTNTEXT) );
 777
 778     BUTTON_DrawLabel(hwnd, hDC, dtFlags, &r);
 779
 780     SetTextColor( hDC, oldTxtColor );
 781     SelectClipRgn(hDC, 0);
 782     DeleteObject(hRgn);
 783
 784     if (state & BUTTON_HASFOCUS)
 785     {
 786         InflateRect( &focus_rect, -1, -1 );
 787         IntersectRect(&focus_rect, &focus_rect, &rc);
 788         DrawFocusRect( hDC, &focus_rect );
 789     }
 790
 791  cleanup:
 792     SelectObject( hDC, hOldPen );
 793     SelectObject( hDC, hOldBrush );
 794     SetBkMode(hDC, oldBkMode);
 795 }
 796
 797 /**********************************************************************
 798  *       Check Box & Radio Button Functions
 799  */
 800
 801 static void CB_Paint( HWND hwnd, HDC hDC, UINT action )
 802 {
 803     RECT rbox, rtext, client;
 804     HBRUSH hBrush;
 805     int delta;
 806     UINT dtFlags;
 807     HRGN hRgn;
 808     HFONT hFont;
 809     LONG state = get_button_state( hwnd );
 810     LONG style = GetWindowLongA( hwnd, GWL_STYLE );
 811
 812     if (style & BS_PUSHLIKE)
 813     {
 814         PB_Paint( hwnd, hDC, action );
 815         return;
 816     }
 817
 818     GetClientRect(hwnd, &client);
 819     rbox = rtext = client;
 820
 821     if ((hFont = get_button_font( hwnd ))) SelectObject( hDC, hFont );
 822
 823     hBrush = (HBRUSH)SendMessageW(GetParent(hwnd), WM_CTLCOLORSTATIC,
 824                                   (WPARAM)hDC, (LPARAM)hwnd);
 825     if (!hBrush) /* did the app forget to call defwindowproc ? */
 826         hBrush = (HBRUSH)DefWindowProcW(GetParent(hwnd), WM_CTLCOLORSTATIC,
 827                                         (WPARAM)hDC, (LPARAM)hwnd );
 828
 829     if (style & BS_LEFTTEXT)
 830     {
 831         /* magic +4 is what CTL3D expects */
 832
 833         rtext.right -= checkBoxWidth + 4;
 834         rbox.left = rbox.right - checkBoxWidth;
 835     }
 836     else
 837     {
 838         rtext.left += checkBoxWidth + 4;
 839         rbox.right = checkBoxWidth;
 840     }
 841
 842     /* Since WM_ERASEBKGND does nothing, first prepare background */
 843     if (action == ODA_SELECT) FillRect( hDC, &rbox, hBrush );
 844     if (action == ODA_DRAWENTIRE) FillRect( hDC, &client, hBrush );
 845
 846     /* Draw label */
 847     client = rtext;
 848     dtFlags = BUTTON_CalcLabelRect(hwnd, hDC, &rtext);
 849
 850     rbox.top = rtext.top;
 851     rbox.bottom = rtext.bottom;
 852     /* Draw the check-box bitmap */
 853     if (action == ODA_DRAWENTIRE || action == ODA_SELECT)
 854     {
 855         UINT flags;
 856
 857         if ((get_button_type(style) == BS_RADIOBUTTON) ||
 858             (get_button_type(style) == BS_AUTORADIOBUTTON)) flags = DFCS_BUTTONRADIO;
 859         else if (state & BUTTON_3STATE) flags = DFCS_BUTTON3STATE;
 860         else flags = DFCS_BUTTONCHECK;
 861
 862         if (state & (BUTTON_CHECKED | BUTTON_3STATE)) flags |= DFCS_CHECKED;
 863         if (state & BUTTON_HIGHLIGHTED) flags |= DFCS_PUSHED;
 864
 865         if (style & WS_DISABLED) flags |= DFCS_INACTIVE;
 866
 867         /* rbox must have the correct height */
 868         delta = rbox.bottom - rbox.top - checkBoxHeight;
 869
 870         if (style & BS_TOP) {
 871             if (delta > 0) {
 872                 rbox.bottom = rbox.top + checkBoxHeight;
 873             } else {
 874                 rbox.top -= -delta/2 + 1;
 875                 rbox.bottom += rbox.top + checkBoxHeight;
 876             }
 877         } else if (style & BS_BOTTOM) {
 878             if (delta > 0) {
 879                 rbox.top = rbox.bottom - checkBoxHeight;
 880             } else {
 881                 rbox.bottom += -delta/2 + 1;
 882                 rbox.top = rbox.bottom -= checkBoxHeight;
 883             }
 884         } else { /* Default */
 885             if (delta > 0) {
 886                 int ofs = (delta / 2);
 887                 rbox.bottom -= ofs + 1;
 888                 rbox.top = rbox.bottom - checkBoxHeight;
 889             } else if (delta < 0) {
 890                 int ofs = (-delta / 2);
 891                 rbox.top -= ofs + 1;
 892                 rbox.bottom = rbox.top + checkBoxHeight;
 893             }
 894         }
 895
 896         DrawFrameControl( hDC, &rbox, DFC_BUTTON, flags );
 897     }
 898
 899     if (dtFlags == (UINT)-1L) /* Noting to draw */
 900         return;
 901     hRgn = CreateRectRgn(client.left, client.top, client.right, client.bottom);
 902     SelectClipRgn(hDC, hRgn);
 903     DeleteObject(hRgn);
 904
 905     if (action == ODA_DRAWENTIRE)
 906         BUTTON_DrawLabel(hwnd, hDC, dtFlags, &rtext);
 907
 908     /* ... and focus */
 909     if ((action == ODA_FOCUS) ||
 910         ((action == ODA_DRAWENTIRE) && (state & BUTTON_HASFOCUS)))
 911     {
 912         rtext.left--;
 913         rtext.right++;
 914         IntersectRect(&rtext, &rtext, &client);
 915         DrawFocusRect( hDC, &rtext );
 916     }
 917     SelectClipRgn(hDC, 0);
 918 }
 919
 920
 921 /**********************************************************************
 922  *       BUTTON_CheckAutoRadioButton
 923  *
 924  * hwnd is checked, uncheck every other auto radio button in group
 925  */
 926 static void BUTTON_CheckAutoRadioButton( HWND hwnd )
 927 {
 928     HWND parent, sibling, start;
 929
 930     parent = GetParent(hwnd);
 931     /* make sure that starting control is not disabled or invisible */
 932     start = sibling = GetNextDlgGroupItem( parent, hwnd, TRUE );
 933     do
 934     {
 935         if (!sibling) break;
 936         if ((hwnd != sibling) &&
 937             ((GetWindowLongA( sibling, GWL_STYLE) & 0x0f) == BS_AUTORADIOBUTTON))
 938             SendMessageW( sibling, BM_SETCHECK, BUTTON_UNCHECKED, 0 );
 939         sibling = GetNextDlgGroupItem( parent, sibling, FALSE );
 940     } while (sibling != start);
 941 }
 942
 943
 944 /**********************************************************************
 945  *       Group Box Functions
 946  */
 947
 948 static void GB_Paint( HWND hwnd, HDC hDC, UINT action )
 949 {
 950     RECT rc, rcFrame;
 951     HBRUSH hbr;
 952     HFONT hFont;
 953     UINT dtFlags;
 954     TEXTMETRICW tm;
 955     LONG style = GetWindowLongA( hwnd, GWL_STYLE );
 956
 957     if (action != ODA_DRAWENTIRE) return;
 958
 959     if ((hFont = get_button_font( hwnd ))) SelectObject( hDC, hFont );
 960     /* GroupBox acts like static control, so it sends CTLCOLORSTATIC */
 961     hbr = (HBRUSH)SendMessageW(GetParent(hwnd), WM_CTLCOLORSTATIC, (WPARAM)hDC, (LPARAM)hwnd);
 962     if (!hbr) /* did the app forget to call defwindowproc ? */
 963         hbr = (HBRUSH)DefWindowProcW(GetParent(hwnd), WM_CTLCOLORSTATIC,
 964                                      (WPARAM)hDC, (LPARAM)hwnd);
 965
 966     GetClientRect( hwnd, &rc);
 967     rcFrame = rc;
 968
 969     GetTextMetricsW (hDC, &tm);
 970     rcFrame.top += (tm.tmHeight / 2) - 1;
 971     DrawEdge (hDC, &rcFrame, EDGE_ETCHED, BF_RECT | ((style & BS_FLAT) ? BF_FLAT : 0));
 972
 973     InflateRect(&rc, -7, 1);
 974     dtFlags = BUTTON_CalcLabelRect(hwnd, hDC, &rc);
 975
 976     if (dtFlags == (UINT)-1L)
 977        return;
 978
 979     /* Because buttons have CS_PARENTDC class style, there is a chance
 980      * that label will be drawn out of client rect.
 981      * But Windows doesn't clip label's rect, so do I.
 982      */
 983
 984     /* There is 1-pixel marging at the left, right, and bottom */
 985     rc.left--; rc.right++; rc.bottom++;
 986     FillRect(hDC, &rc, hbr);
 987     rc.left++; rc.right--; rc.bottom--;
 988
 989     BUTTON_DrawLabel(hwnd, hDC, dtFlags, &rc);
 990 }
 991
 992
 993 /**********************************************************************
 994  *       User Button Functions
 995  */
 996
 997 static void UB_Paint( HWND hwnd, HDC hDC, UINT action )
 998 {
 999     RECT rc;
1000     HBRUSH hBrush;
1001     HFONT hFont;
1002     LONG state = get_button_state( hwnd );
1003
1004     if (action == ODA_SELECT) return;
1005
1006     GetClientRect( hwnd, &rc);
1007
1008     if ((hFont = get_button_font( hwnd ))) SelectObject( hDC, hFont );
1009
1010     hBrush = (HBRUSH)SendMessageW(GetParent(hwnd), WM_CTLCOLORBTN, (WPARAM)hDC, (LPARAM)hwnd);
1011     if (!hBrush) /* did the app forget to call defwindowproc ? */
1012         hBrush = (HBRUSH)DefWindowProcW(GetParent(hwnd), WM_CTLCOLORBTN,
1013                                         (WPARAM)hDC, (LPARAM)hwnd);
1014
1015     FillRect( hDC, &rc, hBrush );
1016     if ((action == ODA_FOCUS) ||
1017         ((action == ODA_DRAWENTIRE) && (state & BUTTON_HASFOCUS)))
1018         DrawFocusRect( hDC, &rc );
1019 }
1020
1021
1022 /**********************************************************************
1023  *       Ownerdrawn Button Functions
1024  */
1025
1026 static void OB_Paint( HWND hwnd, HDC hDC, UINT action )
1027 {
1028     LONG state = get_button_state( hwnd );
1029     DRAWITEMSTRUCT dis;
1030     HRGN clipRegion;
1031     RECT clipRect;
1032     UINT id = GetWindowLongA( hwnd, GWL_ID );
1033
1034     dis.CtlType    = ODT_BUTTON;
1035     dis.CtlID      = id;
1036     dis.itemID     = 0;
1037     dis.itemAction = action;
1038     dis.itemState  = ((state & BUTTON_HASFOCUS) ? ODS_FOCUS : 0) |
1039                      ((state & BUTTON_HIGHLIGHTED) ? ODS_SELECTED : 0) |
1040                      (IsWindowEnabled(hwnd) ? 0: ODS_DISABLED);
1041     dis.hwndItem   = hwnd;
1042     dis.hDC        = hDC;
1043     dis.itemData   = 0;
1044     GetClientRect( hwnd, &dis.rcItem );
1045
1046     clipRegion = CreateRectRgnIndirect(&dis.rcItem);
1047     if (GetClipRgn(hDC, clipRegion) != 1)
1048     {
1049         DeleteObject(clipRegion);
1050         clipRegion=NULL;
1051     }
1052     clipRect = dis.rcItem;
1053     DPtoLP(hDC, (LPPOINT) &clipRect, 2);
1054     IntersectClipRect(hDC, clipRect.left,  clipRect.top, clipRect.right, clipRect.bottom);
1055
1056     SetBkColor( hDC, GetSysColor( COLOR_BTNFACE ) );
1057     SendMessageW( GetParent(hwnd), WM_DRAWITEM, id, (LPARAM)&dis );
1058     SelectClipRgn(hDC, clipRegion);
1059 }