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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 *
21 * NOTES
22 *
23 * This code was audited for completeness against the documented features
24 * of Comctl32.dll version 6.0 on Oct. 3, 2004, by Dimitrie O. Paun.
25 *
26 * Unless otherwise noted, we believe this code to be complete, as per
27 * the specification mentioned above.
28 * If you discover missing features, or bugs, please note them below.
29 *
30 * TODO
31 * Styles
32 * - BS_NOTIFY: is it complete?
33 * - BS_RIGHTBUTTON: same as BS_LEFTTEXT
34 *
35 * Messages
36 * - WM_CHAR: Checks a (manual or automatic) check box on '+' or '=', clears it on '-' key.
37 * - WM_SETFOCUS: For (manual or automatic) radio buttons, send the parent window BN_CLICKED
38 * - WM_NCCREATE: Turns any BS_OWNERDRAW button into a BS_PUSHBUTTON button.
39 * - WM_SYSKEYUP
40 * - BCM_GETIDEALSIZE
41 * - BCM_GETIMAGELIST
42 * - BCM_GETTEXTMARGIN
43 * - BCM_SETIMAGELIST
44 * - BCM_SETTEXTMARGIN
45 *
46 * Notifications
47 * - BCN_HOTITEMCHANGE
48 * - BN_DISABLE
49 * - BN_PUSHED/BN_HILITE
50 * + BN_KILLFOCUS: is it OK?
51 * - BN_PAINT
52 * + BN_SETFOCUS: is it OK?
53 * - BN_UNPUSHED/BN_UNHILITE
54 * - NM_CUSTOMDRAW
55 *
56 * Structures/Macros/Definitions
57 * - BUTTON_IMAGELIST
58 * - NMBCHOTITEM
59 * - Button_GetIdealSize
60 * - Button_GetImageList
61 * - Button_GetTextMargin
62 * - Button_SetImageList
63 * - Button_SetTextMargin
64 */
65
66 #include <stdarg.h>
67 #include <string.h>
68 #include <stdlib.h>
69
70 #define OEMRESOURCE
71
72 #include "windef.h"
73 #include "winbase.h"
74 #include "wingdi.h"
75 #include "controls.h"
76 #include "win.h"
77 #include "user_private.h"
78 #include "wine/debug.h"
79
80 WINE_DEFAULT_DEBUG_CHANNEL(button);
81
82 /* GetWindowLong offsets for window extra information */
83 #define STATE_GWL_OFFSET 0
84 #define HFONT_GWL_OFFSET (sizeof(LONG))
85 #define HIMAGE_GWL_OFFSET (HFONT_GWL_OFFSET+sizeof(HFONT))
86 #define NB_EXTRA_BYTES (HIMAGE_GWL_OFFSET+sizeof(HANDLE))
87
88 /* Button state values */
89 #define BUTTON_UNCHECKED 0x00
90 #define BUTTON_CHECKED 0x01
91 #define BUTTON_3STATE 0x02
92 #define BUTTON_HIGHLIGHTED 0x04
93 #define BUTTON_HASFOCUS 0x08
94 #define BUTTON_NSTATES 0x0F
95 /* undocumented flags */
96 #define BUTTON_BTNPRESSED 0x40
97 #define BUTTON_UNKNOWN2 0x20
98 #define BUTTON_UNKNOWN3 0x10
99
100 #define BUTTON_NOTIFY_PARENT(hWnd, code) \
101 do { /* Notify parent which has created this button control */ \
102 TRACE("notification " #code " sent to hwnd=%p\n", GetParent(hWnd)); \
103 SendMessageW(GetParent(hWnd), WM_COMMAND, \
104 MAKEWPARAM(GetWindowLongPtrW((hWnd),GWLP_ID), (code)), \
105 (LPARAM)(hWnd)); \
106 } while(0)
107
108 static UINT BUTTON_CalcLabelRect( HWND hwnd, HDC hdc, RECT *rc );
109 static void PB_Paint( HWND hwnd, HDC hDC, UINT action );
110 static void CB_Paint( HWND hwnd, HDC hDC, UINT action );
111 static void GB_Paint( HWND hwnd, HDC hDC, UINT action );
112 static void UB_Paint( HWND hwnd, HDC hDC, UINT action );
113 static void OB_Paint( HWND hwnd, HDC hDC, UINT action );
114 static void BUTTON_CheckAutoRadioButton( HWND hwnd );
115
116 #define MAX_BTN_TYPE 16
117
118 static const WORD maxCheckState[MAX_BTN_TYPE] =
119 {
120 BUTTON_UNCHECKED, /* BS_PUSHBUTTON */
121 BUTTON_UNCHECKED, /* BS_DEFPUSHBUTTON */
122 BUTTON_CHECKED, /* BS_CHECKBOX */
123 BUTTON_CHECKED, /* BS_AUTOCHECKBOX */
124 BUTTON_CHECKED, /* BS_RADIOBUTTON */
125 BUTTON_3STATE, /* BS_3STATE */
126 BUTTON_3STATE, /* BS_AUTO3STATE */
127 BUTTON_UNCHECKED, /* BS_GROUPBOX */
128 BUTTON_UNCHECKED, /* BS_USERBUTTON */
129 BUTTON_CHECKED, /* BS_AUTORADIOBUTTON */
130 BUTTON_UNCHECKED, /* BS_PUSHBOX */
131 BUTTON_UNCHECKED /* BS_OWNERDRAW */
132 };
133
134 typedef void (*pfPaint)( HWND hwnd, HDC hdc, UINT action );
135
136 static const pfPaint btnPaintFunc[MAX_BTN_TYPE] =
137 {
138 PB_Paint, /* BS_PUSHBUTTON */
139 PB_Paint, /* BS_DEFPUSHBUTTON */
140 CB_Paint, /* BS_CHECKBOX */
141 CB_Paint, /* BS_AUTOCHECKBOX */
142 CB_Paint, /* BS_RADIOBUTTON */
143 CB_Paint, /* BS_3STATE */
144 CB_Paint, /* BS_AUTO3STATE */
145 GB_Paint, /* BS_GROUPBOX */
146 UB_Paint, /* BS_USERBUTTON */
147 CB_Paint, /* BS_AUTORADIOBUTTON */
148 NULL, /* BS_PUSHBOX */
149 OB_Paint /* BS_OWNERDRAW */
150 };
151
152 static HBITMAP hbitmapCheckBoxes = 0;
153 static WORD checkBoxWidth = 0, checkBoxHeight = 0;
154
155
156 /*********************************************************************
157 * button class descriptor
158 */
159 static const WCHAR buttonW[] = {'B','u','t','t','o','n',0};
160 const struct builtin_class_descr BUTTON_builtin_class =
161 {
162 buttonW, /* name */
163 CS_DBLCLKS | CS_VREDRAW | CS_HREDRAW | CS_PARENTDC, /* style */
164 WINPROC_BUTTON, /* proc */
165 NB_EXTRA_BYTES, /* extra */
166 IDC_ARROW, /* cursor */
167 0 /* brush */
168 };
169
170
171 static inline LONG get_button_state( HWND hwnd )
172 {
173 return GetWindowLongW( hwnd, STATE_GWL_OFFSET );
174 }
175
176 static inline void set_button_state( HWND hwnd, LONG state )
177 {
178 SetWindowLongW( hwnd, STATE_GWL_OFFSET, state );
179 }
180
181 static inline HFONT get_button_font( HWND hwnd )
182 {
183 return (HFONT)GetWindowLongPtrW( hwnd, HFONT_GWL_OFFSET );
184 }
185
186 static inline void set_button_font( HWND hwnd, HFONT font )
187 {
188 SetWindowLongPtrW( hwnd, HFONT_GWL_OFFSET, (LONG_PTR)font );
189 }
190
191 static inline UINT get_button_type( LONG window_style )
192 {
193 return (window_style & BS_TYPEMASK);
194 }
195
196 /* paint a button of any type */
197 static inline void paint_button( HWND hwnd, LONG style, UINT action )
198 {
199 if (btnPaintFunc[style] && IsWindowVisible(hwnd))
200 {
201 HDC hdc = GetDC( hwnd );
202 btnPaintFunc[style]( hwnd, hdc, action );
203 ReleaseDC( hwnd, hdc );
204 }
205 }
206
207 /* retrieve the button text; returned buffer must be freed by caller */
208 static inline WCHAR *get_button_text( HWND hwnd )
209 {
210 INT len = 512;
211 WCHAR *buffer = HeapAlloc( GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR) );
212 if (buffer) InternalGetWindowText( hwnd, buffer, len + 1 );
213 return buffer;
214 }
215
216 /***********************************************************************
217 * ButtonWndProc_common
218 */
219 LRESULT ButtonWndProc_common(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL unicode )
220 {
221 RECT rect;
222 POINT pt;
223 LONG style = GetWindowLongW( hWnd, GWL_STYLE );
224 UINT btn_type = get_button_type( style );
225 LONG state;
226 HANDLE oldHbitmap;
227
228 if (!IsWindow( hWnd )) return 0;
229
230 pt.x = (short)LOWORD(lParam);
231 pt.y = (short)HIWORD(lParam);
232
233 switch (uMsg)
234 {
235 case WM_GETDLGCODE:
236 switch(btn_type)
237 {
238 case BS_USERBUTTON:
239 case BS_PUSHBUTTON: return DLGC_BUTTON | DLGC_UNDEFPUSHBUTTON;
240 case BS_DEFPUSHBUTTON: return DLGC_BUTTON | DLGC_DEFPUSHBUTTON;
241 case BS_RADIOBUTTON:
242 case BS_AUTORADIOBUTTON: return DLGC_BUTTON | DLGC_RADIOBUTTON;
243 case BS_GROUPBOX: return DLGC_STATIC;
244 default: return DLGC_BUTTON;
245 }
246
247 case WM_ENABLE:
248 paint_button( hWnd, btn_type, ODA_DRAWENTIRE );
249 break;
250
251 case WM_CREATE:
252 if (!hbitmapCheckBoxes)
253 {
254 BITMAP bmp;
255 hbitmapCheckBoxes = LoadBitmapW(0, MAKEINTRESOURCEW(OBM_CHECKBOXES));
256 GetObjectW( hbitmapCheckBoxes, sizeof(bmp), &bmp );
257 checkBoxWidth = bmp.bmWidth / 4;
258 checkBoxHeight = bmp.bmHeight / 3;
259 }
260 if (btn_type >= MAX_BTN_TYPE)
261 return -1; /* abort */
262
263 /* XP turns a BS_USERBUTTON into BS_PUSHBUTTON */
264 if (btn_type == BS_USERBUTTON )
265 {
266 style = (style & ~BS_TYPEMASK) | BS_PUSHBUTTON;
267 WIN_SetStyle( hWnd, style, BS_TYPEMASK & ~style );
268 }
269 set_button_state( hWnd, BUTTON_UNCHECKED );
270 return 0;
271
272 case WM_ERASEBKGND:
273 if (btn_type == BS_OWNERDRAW)
274 {
275 HDC hdc = (HDC)wParam;
276 RECT rc;
277 HBRUSH hBrush;
278 HWND parent = GetParent(hWnd);
279 if (!parent) parent = hWnd;
280 hBrush = (HBRUSH)SendMessageW(parent, WM_CTLCOLORBTN, (WPARAM)hdc, (LPARAM)hWnd);
281 if (!hBrush) /* did the app forget to call defwindowproc ? */
282 hBrush = (HBRUSH)DefWindowProcW(parent, WM_CTLCOLORBTN,
283 (WPARAM)hdc, (LPARAM)hWnd);
284 GetClientRect(hWnd, &rc);
285 FillRect(hdc, &rc, hBrush);
286 }
287 return 1;
288
289 case WM_PRINTCLIENT:
290 case WM_PAINT:
291 if (btnPaintFunc[btn_type])
292 {
293 PAINTSTRUCT ps;
294 HDC hdc = wParam ? (HDC)wParam : BeginPaint( hWnd, &ps );
295 int nOldMode = SetBkMode( hdc, OPAQUE );
296 (btnPaintFunc[btn_type])( hWnd, hdc, ODA_DRAWENTIRE );
297 SetBkMode(hdc, nOldMode); /* reset painting mode */
298 if( !wParam ) EndPaint( hWnd, &ps );
299 }
300 break;
301
302 case WM_KEYDOWN:
303 if (wParam == VK_SPACE)
304 {
305 SendMessageW( hWnd, BM_SETSTATE, TRUE, 0 );
306 set_button_state( hWnd, get_button_state( hWnd ) | BUTTON_BTNPRESSED );
307 SetCapture( hWnd );
308 }
309 break;
310
311 case WM_LBUTTONDBLCLK:
312 if(style & BS_NOTIFY ||
313 btn_type == BS_RADIOBUTTON ||
314 btn_type == BS_USERBUTTON ||
315 btn_type == BS_OWNERDRAW)
316 {
317 BUTTON_NOTIFY_PARENT(hWnd, BN_DOUBLECLICKED);
318 break;
319 }
320 /* fall through */
321 case WM_LBUTTONDOWN:
322 SetCapture( hWnd );
323 SetFocus( hWnd );
324 set_button_state( hWnd, get_button_state( hWnd ) | BUTTON_BTNPRESSED );
325 SendMessageW( hWnd, BM_SETSTATE, TRUE, 0 );
326 break;
327
328 case WM_KEYUP:
329 if (wParam != VK_SPACE)
330 break;
331 /* fall through */
332 case WM_LBUTTONUP:
333 state = get_button_state( hWnd );
334 if (!(state & BUTTON_BTNPRESSED)) break;
335 state &= BUTTON_NSTATES;
336 set_button_state( hWnd, state );
337 if (!(state & BUTTON_HIGHLIGHTED))
338 {
339 ReleaseCapture();
340 break;
341 }
342 SendMessageW( hWnd, BM_SETSTATE, FALSE, 0 );
343 ReleaseCapture();
344 GetClientRect( hWnd, &rect );
345 if (uMsg == WM_KEYUP || PtInRect( &rect, pt ))
346 {
347 state = get_button_state( hWnd );
348 switch(btn_type)
349 {
350 case BS_AUTOCHECKBOX:
351 SendMessageW( hWnd, BM_SETCHECK, !(state & BUTTON_CHECKED), 0 );
352 break;
353 case BS_AUTORADIOBUTTON:
354 SendMessageW( hWnd, BM_SETCHECK, TRUE, 0 );
355 break;
356 case BS_AUTO3STATE:
357 SendMessageW( hWnd, BM_SETCHECK,
358 (state & BUTTON_3STATE) ? 0 : ((state & 3) + 1), 0 );
359 break;
360 }
361 BUTTON_NOTIFY_PARENT(hWnd, BN_CLICKED);
362 }
363 break;
364
365 case WM_CAPTURECHANGED:
366 TRACE("WM_CAPTURECHANGED %p\n", hWnd);
367 state = get_button_state( hWnd );
368 if (state & BUTTON_BTNPRESSED)
369 {
370 state &= BUTTON_NSTATES;
371 set_button_state( hWnd, state );
372 if (state & BUTTON_HIGHLIGHTED) SendMessageW( hWnd, BM_SETSTATE, FALSE, 0 );
373 }
374 break;
375
376 case WM_MOUSEMOVE:
377 if ((wParam & MK_LBUTTON) && GetCapture() == hWnd)
378 {
379 GetClientRect( hWnd, &rect );
380 SendMessageW( hWnd, BM_SETSTATE, PtInRect(&rect, pt), 0 );
381 }
382 break;
383
384 case WM_SETTEXT:
385 {
386 /* Clear an old text here as Windows does */
387 HDC hdc = GetDC(hWnd);
388 HBRUSH hbrush;
389 RECT client, rc;
390 HWND parent = GetParent(hWnd);
391
392 if (!parent) parent = hWnd;
393 hbrush = (HBRUSH)SendMessageW(parent, WM_CTLCOLORSTATIC,
394 (WPARAM)hdc, (LPARAM)hWnd);
395 if (!hbrush) /* did the app forget to call DefWindowProc ? */
396 hbrush = (HBRUSH)DefWindowProcW(parent, WM_CTLCOLORSTATIC,
397 (WPARAM)hdc, (LPARAM)hWnd);
398
399 GetClientRect(hWnd, &client);
400 rc = client;
401 BUTTON_CalcLabelRect(hWnd, hdc, &rc);
402 /* Clip by client rect bounds */
403 if (rc.right > client.right) rc.right = client.right;
404 if (rc.bottom > client.bottom) rc.bottom = client.bottom;
405 FillRect(hdc, &rc, hbrush);
406 ReleaseDC(hWnd, hdc);
407
408 if (unicode) DefWindowProcW( hWnd, WM_SETTEXT, wParam, lParam );
409 else DefWindowProcA( hWnd, WM_SETTEXT, wParam, lParam );
410 if (btn_type == BS_GROUPBOX) /* Yes, only for BS_GROUPBOX */
411 InvalidateRect( hWnd, NULL, TRUE );
412 else
413 paint_button( hWnd, btn_type, ODA_DRAWENTIRE );
414 return 1; /* success. FIXME: check text length */
415 }
416
417 case WM_SETFONT:
418 set_button_font( hWnd, (HFONT)wParam );
419 if (lParam) InvalidateRect(hWnd, NULL, TRUE);
420 break;
421
422 case WM_GETFONT:
423 return (LRESULT)get_button_font( hWnd );
424
425 case WM_SETFOCUS:
426 TRACE("WM_SETFOCUS %p\n",hWnd);
427 set_button_state( hWnd, get_button_state(hWnd) | BUTTON_HASFOCUS );
428 paint_button( hWnd, btn_type, ODA_FOCUS );
429 if (style & BS_NOTIFY)
430 BUTTON_NOTIFY_PARENT(hWnd, BN_SETFOCUS);
431 break;
432
433 case WM_KILLFOCUS:
434 TRACE("WM_KILLFOCUS %p\n",hWnd);
435 state = get_button_state( hWnd );
436 set_button_state( hWnd, state & ~BUTTON_HASFOCUS );
437 paint_button( hWnd, btn_type, ODA_FOCUS );
438
439 if ((state & BUTTON_BTNPRESSED) && GetCapture() == hWnd)
440 ReleaseCapture();
441 if (style & BS_NOTIFY)
442 BUTTON_NOTIFY_PARENT(hWnd, BN_KILLFOCUS);
443
444 InvalidateRect( hWnd, NULL, FALSE );
445 break;
446
447 case WM_SYSCOLORCHANGE:
448 InvalidateRect( hWnd, NULL, FALSE );
449 break;
450
451 case BM_SETSTYLE:
452 if ((wParam & BS_TYPEMASK) >= MAX_BTN_TYPE) break;
453 btn_type = wParam & BS_TYPEMASK;
454 style = (style & ~BS_TYPEMASK) | btn_type;
455 WIN_SetStyle( hWnd, style, BS_TYPEMASK & ~style );
456
457 /* Only redraw if lParam flag is set.*/
458 if (lParam)
459 InvalidateRect( hWnd, NULL, TRUE );
460
461 break;
462
463 case BM_CLICK:
464 SendMessageW( hWnd, WM_LBUTTONDOWN, 0, 0 );
465 SendMessageW( hWnd, WM_LBUTTONUP, 0, 0 );
466 break;
467
468 case BM_SETIMAGE:
469 /* Check that image format matches button style */
470 switch (style & (BS_BITMAP|BS_ICON))
471 {
472 case BS_BITMAP:
473 if (wParam != IMAGE_BITMAP) return 0;
474 break;
475 case BS_ICON:
476 if (wParam != IMAGE_ICON) return 0;
477 break;
478 default:
479 return 0;
480 }
481 oldHbitmap = (HBITMAP)SetWindowLongPtrW( hWnd, HIMAGE_GWL_OFFSET, lParam );
482 InvalidateRect( hWnd, NULL, FALSE );
483 return (LRESULT)oldHbitmap;
484
485 case BM_GETIMAGE:
486 return GetWindowLongPtrW( hWnd, HIMAGE_GWL_OFFSET );
487
488 case BM_GETCHECK:
489 return get_button_state( hWnd ) & 3;
490
491 case BM_SETCHECK:
492 if (wParam > maxCheckState[btn_type]) wParam = maxCheckState[btn_type];
493 state = get_button_state( hWnd );
494 if ((btn_type == BS_RADIOBUTTON) || (btn_type == BS_AUTORADIOBUTTON))
495 {
496 if (wParam) WIN_SetStyle( hWnd, WS_TABSTOP, 0 );
497 else WIN_SetStyle( hWnd, 0, WS_TABSTOP );
498 }
499 if ((state & 3) != wParam)
500 {
501 set_button_state( hWnd, (state & ~3) | wParam );
502 paint_button( hWnd, btn_type, ODA_SELECT );
503 }
504 if ((btn_type == BS_AUTORADIOBUTTON) && (wParam == BUTTON_CHECKED) && (style & WS_CHILD))
505 BUTTON_CheckAutoRadioButton( hWnd );
506 break;
507
508 case BM_GETSTATE:
509 return get_button_state( hWnd );
510
511 case BM_SETSTATE:
512 state = get_button_state( hWnd );
513 if (wParam)
514 set_button_state( hWnd, state | BUTTON_HIGHLIGHTED );
515 else
516 set_button_state( hWnd, state & ~BUTTON_HIGHLIGHTED );
517
518 paint_button( hWnd, btn_type, ODA_SELECT );
519 break;
520
521 case WM_NCHITTEST:
522 if(btn_type == BS_GROUPBOX) return HTTRANSPARENT;
523 /* fall through */
524 default:
525 return unicode ? DefWindowProcW(hWnd, uMsg, wParam, lParam) :
526 DefWindowProcA(hWnd, uMsg, wParam, lParam);
527 }
528 return 0;
529 }
530
531 /**********************************************************************
532 * Convert button styles to flags used by DrawText.
533 */
534 static UINT BUTTON_BStoDT( DWORD style, DWORD ex_style )
535 {
536 UINT dtStyle = DT_NOCLIP; /* We use SelectClipRgn to limit output */
537
538 /* "Convert" pushlike buttons to pushbuttons */
539 if (style & BS_PUSHLIKE)
540 style &= ~BS_TYPEMASK;
541
542 if (!(style & BS_MULTILINE))
543 dtStyle |= DT_SINGLELINE;
544 else
545 dtStyle |= DT_WORDBREAK;
546
547 switch (style & BS_CENTER)
548 {
549 case BS_LEFT: /* DT_LEFT is 0 */ break;
550 case BS_RIGHT: dtStyle |= DT_RIGHT; break;
551 case BS_CENTER: dtStyle |= DT_CENTER; break;
552 default:
553 /* Pushbutton's text is centered by default */
554 if (get_button_type(style) <= BS_DEFPUSHBUTTON) dtStyle |= DT_CENTER;
555 /* all other flavours have left aligned text */
556 }
557
558 if (ex_style & WS_EX_RIGHT) dtStyle = DT_RIGHT | (dtStyle & ~(DT_LEFT | DT_CENTER));
559
560 /* DrawText ignores vertical alignment for multiline text,
561 * but we use these flags to align label manually.
562 */
563 if (get_button_type(style) != BS_GROUPBOX)
564 {
565 switch (style & BS_VCENTER)
566 {
567 case BS_TOP: /* DT_TOP is 0 */ break;
568 case BS_BOTTOM: dtStyle |= DT_BOTTOM; break;
569 case BS_VCENTER: /* fall through */
570 default: dtStyle |= DT_VCENTER; break;
571 }
572 }
573 else
574 /* GroupBox's text is always single line and is top aligned. */
575 dtStyle |= DT_SINGLELINE;
576
577 return dtStyle;
578 }
579
580 /**********************************************************************
581 * BUTTON_CalcLabelRect
582 *
583 * Calculates label's rectangle depending on button style.
584 *
585 * Returns flags to be passed to DrawText.
586 * Calculated rectangle doesn't take into account button state
587 * (pushed, etc.). If there is nothing to draw (no text/image) output
588 * rectangle is empty, and return value is (UINT)-1.
589 */
590 static UINT BUTTON_CalcLabelRect(HWND hwnd, HDC hdc, RECT *rc)
591 {
592 LONG style = GetWindowLongW( hwnd, GWL_STYLE );
593 LONG ex_style = GetWindowLongW( hwnd, GWL_EXSTYLE );
594 WCHAR *text;
595 ICONINFO iconInfo;
596 BITMAP bm;
597 UINT dtStyle = BUTTON_BStoDT( style, ex_style );
598 RECT r = *rc;
599 INT n;
600
601 /* Calculate label rectangle according to label type */
602 switch (style & (BS_ICON|BS_BITMAP))
603 {
604 case BS_TEXT:
605 if (!(text = get_button_text( hwnd ))) goto empty_rect;
606 if (!text[0])
607 {
608 HeapFree( GetProcessHeap(), 0, text );
609 goto empty_rect;
610 }
611 DrawTextW(hdc, text, -1, &r, dtStyle | DT_CALCRECT);
612 HeapFree( GetProcessHeap(), 0, text );
613 break;
614
615 case BS_ICON:
616 if (!GetIconInfo((HICON)GetWindowLongPtrW( hwnd, HIMAGE_GWL_OFFSET ), &iconInfo))
617 goto empty_rect;
618
619 GetObjectW (iconInfo.hbmColor, sizeof(BITMAP), &bm);
620
621 r.right = r.left + bm.bmWidth;
622 r.bottom = r.top + bm.bmHeight;
623
624 DeleteObject(iconInfo.hbmColor);
625 DeleteObject(iconInfo.hbmMask);
626 break;
627
628 case BS_BITMAP:
629 if (!GetObjectW( (HANDLE)GetWindowLongPtrW( hwnd, HIMAGE_GWL_OFFSET ), sizeof(BITMAP), &bm))
630 goto empty_rect;
631
632 r.right = r.left + bm.bmWidth;
633 r.bottom = r.top + bm.bmHeight;
634 break;
635
636 default:
637 empty_rect:
638 rc->right = r.left;
639 rc->bottom = r.top;
640 return (UINT)-1;
641 }
642
643 /* Position label inside bounding rectangle according to
644 * alignment flags. (calculated rect is always left-top aligned).
645 * If label is aligned to any side - shift label in opposite
646 * direction to leave extra space for focus rectangle.
647 */
648 switch (dtStyle & (DT_CENTER|DT_RIGHT))
649 {
650 case DT_LEFT: r.left++; r.right++; break;
651 case DT_CENTER: n = r.right - r.left;
652 r.left = rc->left + ((rc->right - rc->left) - n) / 2;
653 r.right = r.left + n; break;
654 case DT_RIGHT: n = r.right - r.left;
655 r.right = rc->right - 1;
656 r.left = r.right - n;
657 break;
658 }
659
660 switch (dtStyle & (DT_VCENTER|DT_BOTTOM))
661 {
662 case DT_TOP: r.top++; r.bottom++; break;
663 case DT_VCENTER: n = r.bottom - r.top;
664 r.top = rc->top + ((rc->bottom - rc->top) - n) / 2;
665 r.bottom = r.top + n; break;
666 case DT_BOTTOM: n = r.bottom - r.top;
667 r.bottom = rc->bottom - 1;
668 r.top = r.bottom - n;
669 break;
670 }
671
672 *rc = r;
673 return dtStyle;
674 }
675
676
677 /**********************************************************************
678 * BUTTON_DrawTextCallback
679 *
680 * Callback function used by DrawStateW function.
681 */
682 static BOOL CALLBACK BUTTON_DrawTextCallback(HDC hdc, LPARAM lp, WPARAM wp, int cx, int cy)
683 {
684 RECT rc;
685 rc.left = 0;
686 rc.top = 0;
687 rc.right = cx;
688 rc.bottom = cy;
689
690 DrawTextW(hdc, (LPCWSTR)lp, -1, &rc, (UINT)wp);
691 return TRUE;
692 }
693
694
695 /**********************************************************************
696 * BUTTON_DrawLabel
697 *
698 * Common function for drawing button label.
699 */
700 static void BUTTON_DrawLabel(HWND hwnd, HDC hdc, UINT dtFlags, const RECT *rc)
701 {
702 DRAWSTATEPROC lpOutputProc = NULL;
703 LPARAM lp;
704 WPARAM wp = 0;
705 HBRUSH hbr = 0;
706 UINT flags = IsWindowEnabled(hwnd) ? DSS_NORMAL : DSS_DISABLED;
707 LONG state = get_button_state( hwnd );
708 LONG style = GetWindowLongW( hwnd, GWL_STYLE );
709 WCHAR *text = NULL;
710
711 /* FIXME: To draw disabled label in Win31 look-and-feel, we probably
712 * must use DSS_MONO flag and COLOR_GRAYTEXT brush (or maybe DSS_UNION).
713 * I don't have Win31 on hand to verify that, so I leave it as is.
714 */
715
716 if ((style & BS_PUSHLIKE) && (state & BUTTON_3STATE))
717 {
718 hbr = GetSysColorBrush(COLOR_GRAYTEXT);
719 flags |= DSS_MONO;
720 }
721
722 switch (style & (BS_ICON|BS_BITMAP))
723 {
724 case BS_TEXT:
725 /* DST_COMPLEX -- is 0 */
726 lpOutputProc = BUTTON_DrawTextCallback;
727 if (!(text = get_button_text( hwnd ))) return;
728 lp = (LPARAM)text;
729 wp = dtFlags;
730 break;
731
732 case BS_ICON:
733 flags |= DST_ICON;
734 lp = GetWindowLongPtrW( hwnd, HIMAGE_GWL_OFFSET );
735 break;
736
737 case BS_BITMAP:
738 flags |= DST_BITMAP;
739 lp = GetWindowLongPtrW( hwnd, HIMAGE_GWL_OFFSET );
740 break;
741
742 default:
743 return;
744 }
745
746 DrawStateW(hdc, hbr, lpOutputProc, lp, wp, rc->left, rc->top,
747 rc->right - rc->left, rc->bottom - rc->top, flags);
748 HeapFree( GetProcessHeap(), 0, text );
749 }
750
751 /**********************************************************************
752 * Push Button Functions
753 */
754 static void PB_Paint( HWND hwnd, HDC hDC, UINT action )
755 {
756 RECT rc, r;
757 UINT dtFlags, uState;
758 HPEN hOldPen;
759 HBRUSH hOldBrush;
760 INT oldBkMode;
761 COLORREF oldTxtColor;
762 HFONT hFont;
763 LONG state = get_button_state( hwnd );
764 LONG style = GetWindowLongW( hwnd, GWL_STYLE );
765 BOOL pushedState = (state & BUTTON_HIGHLIGHTED);
766 HWND parent;
767 HRGN hrgn;
768
769 GetClientRect( hwnd, &rc );
770
771 /* Send WM_CTLCOLOR to allow changing the font (the colors are fixed) */
772 if ((hFont = get_button_font( hwnd ))) SelectObject( hDC, hFont );
773 parent = GetParent(hwnd);
774 if (!parent) parent = hwnd;
775 SendMessageW( parent, WM_CTLCOLORBTN, (WPARAM)hDC, (LPARAM)hwnd );
776
777 hrgn = set_control_clipping( hDC, &rc );
778
779 hOldPen = SelectObject(hDC, SYSCOLOR_GetPen(COLOR_WINDOWFRAME));
780 hOldBrush = SelectObject(hDC,GetSysColorBrush(COLOR_BTNFACE));
781 oldBkMode = SetBkMode(hDC, TRANSPARENT);
782
783 if (get_button_type(style) == BS_DEFPUSHBUTTON)
784 {
785 if (action != ODA_FOCUS)
786 Rectangle(hDC, rc.left, rc.top, rc.right, rc.bottom);
787 InflateRect( &rc, -1, -1 );
788 }
789
790 /* completely skip the drawing if only focus has changed */
791 if (action == ODA_FOCUS) goto draw_focus;
792
793 uState = DFCS_BUTTONPUSH;
794
795 if (style & BS_FLAT)
796 uState |= DFCS_MONO;
797 else if (pushedState)
798 {
799 if (get_button_type(style) == BS_DEFPUSHBUTTON )
800 uState |= DFCS_FLAT;
801 else
802 uState |= DFCS_PUSHED;
803 }
804
805 if (state & (BUTTON_CHECKED | BUTTON_3STATE))
806 uState |= DFCS_CHECKED;
807
808 DrawFrameControl( hDC, &rc, DFC_BUTTON, uState );
809
810 /* draw button label */
811 r = rc;
812 dtFlags = BUTTON_CalcLabelRect(hwnd, hDC, &r);
813
814 if (dtFlags == (UINT)-1L)
815 goto cleanup;
816
817 if (pushedState)
818 OffsetRect(&r, 1, 1);
819
820 oldTxtColor = SetTextColor( hDC, GetSysColor(COLOR_BTNTEXT) );
821
822 BUTTON_DrawLabel(hwnd, hDC, dtFlags, &r);
823
824 SetTextColor( hDC, oldTxtColor );
825
826 draw_focus:
827 if (action == ODA_FOCUS || (state & BUTTON_HASFOCUS))
828 {
829 InflateRect( &rc, -2, -2 );
830 DrawFocusRect( hDC, &rc );
831 }
832
833 cleanup:
834 SelectObject( hDC, hOldPen );
835 SelectObject( hDC, hOldBrush );
836 SetBkMode(hDC, oldBkMode);
837 SelectClipRgn( hDC, hrgn );
838 if (hrgn) DeleteObject( hrgn );
839 }
840
841 /**********************************************************************
842 * Check Box & Radio Button Functions
843 */
844
845 static void CB_Paint( HWND hwnd, HDC hDC, UINT action )
846 {
847 RECT rbox, rtext, client;
848 HBRUSH hBrush;
849 int delta;
850 UINT dtFlags;
851 HFONT hFont;
852 LONG state = get_button_state( hwnd );
853 LONG style = GetWindowLongW( hwnd, GWL_STYLE );
854 HWND parent;
855 HRGN hrgn;
856
857 if (style & BS_PUSHLIKE)
858 {
859 PB_Paint( hwnd, hDC, action );
860 return;
861 }
862
863 GetClientRect(hwnd, &client);
864 rbox = rtext = client;
865
866 if ((hFont = get_button_font( hwnd ))) SelectObject( hDC, hFont );
867
868 parent = GetParent(hwnd);
869 if (!parent) parent = hwnd;
870 hBrush = (HBRUSH)SendMessageW(parent, WM_CTLCOLORSTATIC,
871 (WPARAM)hDC, (LPARAM)hwnd);
872 if (!hBrush) /* did the app forget to call defwindowproc ? */
873 hBrush = (HBRUSH)DefWindowProcW(parent, WM_CTLCOLORSTATIC,
874 (WPARAM)hDC, (LPARAM)hwnd );
875 hrgn = set_control_clipping( hDC, &client );
876
877 if (style & BS_LEFTTEXT)
878 {
879 /* magic +4 is what CTL3D expects */
880
881 rtext.right -= checkBoxWidth + 4;
882 rbox.left = rbox.right - checkBoxWidth;
883 }
884 else
885 {
886 rtext.left += checkBoxWidth + 4;
887 rbox.right = checkBoxWidth;
888 }
889
890 /* Since WM_ERASEBKGND does nothing, first prepare background */
891 if (action == ODA_SELECT) FillRect( hDC, &rbox, hBrush );
892 if (action == ODA_DRAWENTIRE) FillRect( hDC, &client, hBrush );
893
894 /* Draw label */
895 client = rtext;
896 dtFlags = BUTTON_CalcLabelRect(hwnd, hDC, &rtext);
897
898 /* Only adjust rbox when rtext is valid */
899 if (dtFlags != (UINT)-1L)
900 {
901 rbox.top = rtext.top;
902 rbox.bottom = rtext.bottom;
903 }
904
905 /* Draw the check-box bitmap */
906 if (action == ODA_DRAWENTIRE || action == ODA_SELECT)
907 {
908 UINT flags;
909
910 if ((get_button_type(style) == BS_RADIOBUTTON) ||
911 (get_button_type(style) == BS_AUTORADIOBUTTON)) flags = DFCS_BUTTONRADIO;
912 else if (state & BUTTON_3STATE) flags = DFCS_BUTTON3STATE;
913 else flags = DFCS_BUTTONCHECK;
914
915 if (state & (BUTTON_CHECKED | BUTTON_3STATE)) flags |= DFCS_CHECKED;
916 if (state & BUTTON_HIGHLIGHTED) flags |= DFCS_PUSHED;
917
918 if (style & WS_DISABLED) flags |= DFCS_INACTIVE;
919
920 /* rbox must have the correct height */
921 delta = rbox.bottom - rbox.top - checkBoxHeight;
922
923 if (style & BS_TOP) {
924 if (delta > 0) {
925 rbox.bottom = rbox.top + checkBoxHeight;
926 } else {
927 rbox.top -= -delta/2 + 1;
928 rbox.bottom = rbox.top + checkBoxHeight;
929 }
930 } else if (style & BS_BOTTOM) {
931 if (delta > 0) {
932 rbox.top = rbox.bottom - checkBoxHeight;
933 } else {
934 rbox.bottom += -delta/2 + 1;
935 rbox.top = rbox.bottom - checkBoxHeight;
936 }
937 } else { /* Default */
938 if (delta > 0) {
939 int ofs = (delta / 2);
940 rbox.bottom -= ofs + 1;
941 rbox.top = rbox.bottom - checkBoxHeight;
942 } else if (delta < 0) {
943 int ofs = (-delta / 2);
944 rbox.top -= ofs + 1;
945 rbox.bottom = rbox.top + checkBoxHeight;
946 }
947 }
948
949 DrawFrameControl( hDC, &rbox, DFC_BUTTON, flags );
950 }
951
952 if (dtFlags == (UINT)-1L) /* Noting to draw */
953 return;
954
955 if (action == ODA_DRAWENTIRE)
956 BUTTON_DrawLabel(hwnd, hDC, dtFlags, &rtext);
957
958 /* ... and focus */
959 if (action == ODA_FOCUS || (state & BUTTON_HASFOCUS))
960 {
961 rtext.left--;
962 rtext.right++;
963 IntersectRect(&rtext, &rtext, &client);
964 DrawFocusRect( hDC, &rtext );
965 }
966 SelectClipRgn( hDC, hrgn );
967 if (hrgn) DeleteObject( hrgn );
968 }
969
970
971 /**********************************************************************
972 * BUTTON_CheckAutoRadioButton
973 *
974 * hwnd is checked, uncheck every other auto radio button in group
975 */
976 static void BUTTON_CheckAutoRadioButton( HWND hwnd )
977 {
978 HWND parent, sibling, start;
979
980 parent = GetParent(hwnd);
981 /* make sure that starting control is not disabled or invisible */
982 start = sibling = GetNextDlgGroupItem( parent, hwnd, TRUE );
983 do
984 {
985 if (!sibling) break;
986 if ((hwnd != sibling) &&
987 ((GetWindowLongW( sibling, GWL_STYLE) & BS_TYPEMASK) == BS_AUTORADIOBUTTON))
988 SendMessageW( sibling, BM_SETCHECK, BUTTON_UNCHECKED, 0 );
989 sibling = GetNextDlgGroupItem( parent, sibling, FALSE );
990 } while (sibling != start);
991 }
992
993
994 /**********************************************************************
995 * Group Box Functions
996 */
997
998 static void GB_Paint( HWND hwnd, HDC hDC, UINT action )
999 {
1000 RECT rc, rcFrame;
1001 HBRUSH hbr;
1002 HFONT hFont;
1003 UINT dtFlags;
1004 TEXTMETRICW tm;
1005 LONG style = GetWindowLongW( hwnd, GWL_STYLE );
1006 HWND parent;
1007 HRGN hrgn;
1008
1009 if ((hFont = get_button_font( hwnd ))) SelectObject( hDC, hFont );
1010 /* GroupBox acts like static control, so it sends CTLCOLORSTATIC */
1011 parent = GetParent(hwnd);
1012 if (!parent) parent = hwnd;
1013 hbr = (HBRUSH)SendMessageW(parent, WM_CTLCOLORSTATIC, (WPARAM)hDC, (LPARAM)hwnd);
1014 if (!hbr) /* did the app forget to call defwindowproc ? */
1015 hbr = (HBRUSH)DefWindowProcW(parent, WM_CTLCOLORSTATIC,
1016 (WPARAM)hDC, (LPARAM)hwnd);
1017 GetClientRect( hwnd, &rc);
1018 rcFrame = rc;
1019 hrgn = set_control_clipping( hDC, &rc );
1020
1021 GetTextMetricsW (hDC, &tm);
1022 rcFrame.top += (tm.tmHeight / 2) - 1;
1023 DrawEdge (hDC, &rcFrame, EDGE_ETCHED, BF_RECT | ((style & BS_FLAT) ? BF_FLAT : 0));
1024
1025 InflateRect(&rc, -7, 1);
1026 dtFlags = BUTTON_CalcLabelRect(hwnd, hDC, &rc);
1027
1028 if (dtFlags != (UINT)-1)
1029 {
1030 /* Because buttons have CS_PARENTDC class style, there is a chance
1031 * that label will be drawn out of client rect.
1032 * But Windows doesn't clip label's rect, so do I.
1033 */
1034
1035 /* There is 1-pixel margin at the left, right, and bottom */
1036 rc.left--; rc.right++; rc.bottom++;
1037 FillRect(hDC, &rc, hbr);
1038 rc.left++; rc.right--; rc.bottom--;
1039
1040 BUTTON_DrawLabel(hwnd, hDC, dtFlags, &rc);
1041 }
1042 SelectClipRgn( hDC, hrgn );
1043 if (hrgn) DeleteObject( hrgn );
1044 }
1045
1046
1047 /**********************************************************************
1048 * User Button Functions
1049 */
1050
1051 static void UB_Paint( HWND hwnd, HDC hDC, UINT action )
1052 {
1053 RECT rc;
1054 HBRUSH hBrush;
1055 HFONT hFont;
1056 LONG state = get_button_state( hwnd );
1057 HWND parent;
1058
1059 GetClientRect( hwnd, &rc);
1060
1061 if ((hFont = get_button_font( hwnd ))) SelectObject( hDC, hFont );
1062
1063 parent = GetParent(hwnd);
1064 if (!parent) parent = hwnd;
1065 hBrush = (HBRUSH)SendMessageW(parent, WM_CTLCOLORBTN, (WPARAM)hDC, (LPARAM)hwnd);
1066 if (!hBrush) /* did the app forget to call defwindowproc ? */
1067 hBrush = (HBRUSH)DefWindowProcW(parent, WM_CTLCOLORBTN,
1068 (WPARAM)hDC, (LPARAM)hwnd);
1069
1070 FillRect( hDC, &rc, hBrush );
1071 if (action == ODA_FOCUS || (state & BUTTON_HASFOCUS))
1072 DrawFocusRect( hDC, &rc );
1073
1074 switch (action)
1075 {
1076 case ODA_FOCUS:
1077 BUTTON_NOTIFY_PARENT( hwnd, (state & BUTTON_HASFOCUS) ? BN_SETFOCUS : BN_KILLFOCUS );
1078 break;
1079
1080 case ODA_SELECT:
1081 BUTTON_NOTIFY_PARENT( hwnd, (state & BUTTON_HIGHLIGHTED) ? BN_HILITE : BN_UNHILITE );
1082 break;
1083
1084 default:
1085 BUTTON_NOTIFY_PARENT( hwnd, BN_PAINT );
1086 break;
1087 }
1088 }
1089
1090
1091 /**********************************************************************
1092 * Ownerdrawn Button Functions
1093 */
1094
1095 static void OB_Paint( HWND hwnd, HDC hDC, UINT action )
1096 {
1097 LONG state = get_button_state( hwnd );
1098 DRAWITEMSTRUCT dis;
1099 LONG_PTR id = GetWindowLongPtrW( hwnd, GWLP_ID );
1100 HWND parent;
1101 HFONT hFont, hPrevFont = 0;
1102 HRGN hrgn;
1103
1104 dis.CtlType = ODT_BUTTON;
1105 dis.CtlID = id;
1106 dis.itemID = 0;
1107 dis.itemAction = action;
1108 dis.itemState = ((state & BUTTON_HASFOCUS) ? ODS_FOCUS : 0) |
1109 ((state & BUTTON_HIGHLIGHTED) ? ODS_SELECTED : 0) |
1110 (IsWindowEnabled(hwnd) ? 0: ODS_DISABLED);
1111 dis.hwndItem = hwnd;
1112 dis.hDC = hDC;
1113 dis.itemData = 0;
1114 GetClientRect( hwnd, &dis.rcItem );
1115
1116 if ((hFont = get_button_font( hwnd ))) hPrevFont = SelectObject( hDC, hFont );
1117 parent = GetParent(hwnd);
1118 if (!parent) parent = hwnd;
1119 SendMessageW( parent, WM_CTLCOLORBTN, (WPARAM)hDC, (LPARAM)hwnd );
1120
1121 hrgn = set_control_clipping( hDC, &dis.rcItem );
1122
1123 SendMessageW( GetParent(hwnd), WM_DRAWITEM, id, (LPARAM)&dis );
1124 if (hPrevFont) SelectObject(hDC, hPrevFont);
1125 SelectClipRgn( hDC, hrgn );
1126 if (hrgn) DeleteObject( hrgn );
1127 }
1128
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