?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
user: Add missing WIN_ReleasePtr.
[wine/multimedia.git] / dlls / user / scroll.c
blob8774a88dc2ccbc1d761a1e899c01def308bcec6b
1 /*
2 * Scrollbar control
3 *
4 * Copyright 1993 Martin Ayotte
5 * Copyright 1994, 1996 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 * NOTES
22 *
23 * This code was audited for completeness against the documented features
24 * of Comctl32.dll version 6.0 on Oct. 8, 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
31 #include <stdarg.h>
32
33 #include "windef.h"
34 #include "winbase.h"
35 #include "wingdi.h"
36 #include "wine/winuser16.h"
37 #include "controls.h"
38 #include "win.h"
39 #include "wine/debug.h"
40 #include "user_private.h"
41
42 WINE_DEFAULT_DEBUG_CHANNEL(scroll);
43
44 typedef struct
45 {
46 INT curVal; /* Current scroll-bar value */
47 INT minVal; /* Minimum scroll-bar value */
48 INT maxVal; /* Maximum scroll-bar value */
49 INT page; /* Page size of scroll bar (Win32) */
50 UINT flags; /* EnableScrollBar flags */
51 } SCROLLBAR_INFO, *LPSCROLLBAR_INFO;
52
53
54 /* Minimum size of the rectangle between the arrows */
55 #define SCROLL_MIN_RECT 4
56
57 /* Minimum size of the thumb in pixels */
58 #define SCROLL_MIN_THUMB 6
59
60 /* Overlap between arrows and thumb */
61 #define SCROLL_ARROW_THUMB_OVERLAP 0
62
63 /* Delay (in ms) before first repetition when holding the button down */
64 #define SCROLL_FIRST_DELAY 200
65
66 /* Delay (in ms) between scroll repetitions */
67 #define SCROLL_REPEAT_DELAY 50
68
69 /* Scroll timer id */
70 #define SCROLL_TIMER 0
71
72 /* Scroll-bar hit testing */
73 enum SCROLL_HITTEST
74 {
75 SCROLL_NOWHERE, /* Outside the scroll bar */
76 SCROLL_TOP_ARROW, /* Top or left arrow */
77 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
78 SCROLL_THUMB, /* Thumb rectangle */
79 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
80 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
81 };
82
83 /* What to do after SCROLL_SetScrollInfo() */
84 #define SA_SSI_HIDE 0x0001
85 #define SA_SSI_SHOW 0x0002
86 #define SA_SSI_REFRESH 0x0004
87 #define SA_SSI_REPAINT_ARROWS 0x0008
88
89 /* Thumb-tracking info */
90 static HWND SCROLL_TrackingWin = 0;
91 static INT SCROLL_TrackingBar = 0;
92 static INT SCROLL_TrackingPos = 0;
93 static INT SCROLL_TrackingVal = 0;
94 /* Hit test code of the last button-down event */
95 static enum SCROLL_HITTEST SCROLL_trackHitTest;
96 static BOOL SCROLL_trackVertical;
97
98 /* Is the moving thumb being displayed? */
99 static BOOL SCROLL_MovingThumb = FALSE;
100
101 /* Local functions */
102 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
103 BOOL fShowH, BOOL fShowV );
104 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
105 const SCROLLINFO *info, BOOL bRedraw );
106 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
107 RECT *rect, INT arrowSize,
108 INT thumbSize, INT thumbPos,
109 UINT flags, BOOL vertical,
110 BOOL top_selected, BOOL bottom_selected );
111 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
112
113
114 /*********************************************************************
115 * scrollbar class descriptor
116 */
117 const struct builtin_class_descr SCROLL_builtin_class =
118 {
119 "ScrollBar", /* name */
120 CS_DBLCLKS | CS_VREDRAW | CS_HREDRAW | CS_PARENTDC, /* style */
121 NULL, /* procA (winproc is Unicode only) */
122 ScrollBarWndProc, /* procW */
123 sizeof(SCROLLBAR_INFO), /* extra */
124 IDC_ARROW, /* cursor */
125 0 /* brush */
126 };
127
128 /***********************************************************************
129 * SCROLL_ScrollInfoValid
130 *
131 * Determine if the supplied SCROLLINFO struct is valid.
132 * info [in] The SCROLLINFO struct to be tested
133 */
134 inline static BOOL SCROLL_ScrollInfoValid( LPCSCROLLINFO info )
135 {
136 return !(info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)
137 || (info->cbSize != sizeof(*info)
138 && info->cbSize != sizeof(*info) - sizeof(info->nTrackPos)));
139 }
140
141
142 /***********************************************************************
143 * SCROLL_GetInternalInfo
144
145 * Returns pointer to internal SCROLLBAR_INFO structure for nBar
146 * or NULL if failed (f.i. scroll bar does not exist yet)
147 * If alloc is TRUE and the struct does not exist yet, create it.
148 */
149 static SCROLLBAR_INFO *SCROLL_GetInternalInfo( HWND hwnd, INT nBar, BOOL alloc )
150 {
151 SCROLLBAR_INFO *infoPtr = NULL;
152 WND *wndPtr = WIN_GetPtr( hwnd );
153
154 if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return NULL;
155 switch(nBar)
156 {
157 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
158 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
159 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
160 case SB_BOTH: WARN("with SB_BOTH"); break;
161 }
162
163 if (!infoPtr && alloc)
164 {
165 if (nBar != SB_HORZ && nBar != SB_VERT)
166 WARN("Cannot initialize nBar=%d\n",nBar);
167 else if ((infoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(SCROLLBAR_INFO) )))
168 {
169 /* Set default values */
170 infoPtr->minVal = infoPtr->curVal = infoPtr->page = 0;
171 /* From MSDN: max for a standard scroll bar is 100 by default. */
172 infoPtr->maxVal = 100;
173 /* Scroll bar is enabled by default after create */
174 infoPtr->flags = ESB_ENABLE_BOTH;
175 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
176 else wndPtr->pVScroll = infoPtr;
177 }
178 }
179 WIN_ReleasePtr( wndPtr );
180 return infoPtr;
181 }
182
183
184 /***********************************************************************
185 * SCROLL_GetScrollBarRect
186 *
187 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
188 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
189 * 'arrowSize' returns the width or height of an arrow (depending on
190 * the orientation of the scrollbar), 'thumbSize' returns the size of
191 * the thumb, and 'thumbPos' returns the position of the thumb
192 * relative to the left or to the top.
193 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
194 */
195 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
196 INT *arrowSize, INT *thumbSize,
197 INT *thumbPos )
198 {
199 INT pixels;
200 BOOL vertical;
201 WND *wndPtr = WIN_GetPtr( hwnd );
202
203 if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return FALSE;
204
205 switch(nBar)
206 {
207 case SB_HORZ:
208 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
209 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
210 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
211 lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
212 if(wndPtr->dwStyle & WS_BORDER) {
213 lprect->left--;
214 lprect->right++;
215 } else if(wndPtr->dwStyle & WS_VSCROLL)
216 lprect->right++;
217 vertical = FALSE;
218 break;
219
220 case SB_VERT:
221 if((wndPtr->dwExStyle & WS_EX_LEFTSCROLLBAR) != 0)
222 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left - GetSystemMetrics(SM_CXVSCROLL);
223 else
224 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
225 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
226 lprect->right = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
227 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
228 if(wndPtr->dwStyle & WS_BORDER) {
229 lprect->top--;
230 lprect->bottom++;
231 } else if(wndPtr->dwStyle & WS_HSCROLL)
232 lprect->bottom++;
233 vertical = TRUE;
234 break;
235
236 case SB_CTL:
237 GetClientRect( hwnd, lprect );
238 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
239 break;
240
241 default:
242 WIN_ReleasePtr( wndPtr );
243 return FALSE;
244 }
245
246 if (vertical) pixels = lprect->bottom - lprect->top;
247 else pixels = lprect->right - lprect->left;
248
249 if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
250 {
251 if (pixels > SCROLL_MIN_RECT)
252 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
253 else
254 *arrowSize = 0;
255 *thumbPos = *thumbSize = 0;
256 }
257 else
258 {
259 SCROLLBAR_INFO *info = SCROLL_GetInternalInfo( hwnd, nBar, FALSE );
260 if (!info)
261 {
262 WARN("called for missing scroll bar");
263 WIN_ReleasePtr( wndPtr );
264 return FALSE;
265 }
266 *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
267 pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
268
269 if (info->page)
270 {
271 *thumbSize = MulDiv(pixels,info->page,(info->maxVal-info->minVal+1));
272 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
273 }
274 else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
275
276 if (((pixels -= *thumbSize ) < 0) ||
277 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
278 {
279 /* Rectangle too small or scrollbar disabled -> no thumb */
280 *thumbPos = *thumbSize = 0;
281 }
282 else
283 {
284 INT max = info->maxVal - max( info->page-1, 0 );
285 if (info->minVal >= max)
286 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
287 else
288 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
289 + MulDiv(pixels, (info->curVal-info->minVal),(max - info->minVal));
290 }
291 }
292 WIN_ReleasePtr( wndPtr );
293 return vertical;
294 }
295
296
297 /***********************************************************************
298 * SCROLL_GetThumbVal
299 *
300 * Compute the current scroll position based on the thumb position in pixels
301 * from the top of the scroll-bar.
302 */
303 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
304 BOOL vertical, INT pos )
305 {
306 INT thumbSize;
307 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
308
309 if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
310 return infoPtr->minVal;
311
312 if (infoPtr->page)
313 {
314 thumbSize = MulDiv(pixels,infoPtr->page,(infoPtr->maxVal-infoPtr->minVal+1));
315 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
316 }
317 else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
318
319 if ((pixels -= thumbSize) <= 0) return infoPtr->minVal;
320
321 pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
322 if (pos > pixels) pos = pixels;
323
324 if (!infoPtr->page) pos *= infoPtr->maxVal - infoPtr->minVal;
325 else pos *= infoPtr->maxVal - infoPtr->minVal - infoPtr->page + 1;
326 return infoPtr->minVal + ((pos + pixels / 2) / pixels);
327 }
328
329 /***********************************************************************
330 * SCROLL_PtInRectEx
331 */
332 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
333 {
334 RECT rect = *lpRect;
335
336 if (vertical)
337 {
338 rect.left -= lpRect->right - lpRect->left;
339 rect.right += lpRect->right - lpRect->left;
340 }
341 else
342 {
343 rect.top -= lpRect->bottom - lpRect->top;
344 rect.bottom += lpRect->bottom - lpRect->top;
345 }
346 return PtInRect( &rect, pt );
347 }
348
349 /***********************************************************************
350 * SCROLL_ClipPos
351 */
352 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
353 {
354 if( pt.x < lpRect->left )
355 pt.x = lpRect->left;
356 else
357 if( pt.x > lpRect->right )
358 pt.x = lpRect->right;
359
360 if( pt.y < lpRect->top )
361 pt.y = lpRect->top;
362 else
363 if( pt.y > lpRect->bottom )
364 pt.y = lpRect->bottom;
365
366 return pt;
367 }
368
369
370 /***********************************************************************
371 * SCROLL_HitTest
372 *
373 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
374 */
375 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
376 POINT pt, BOOL bDragging )
377 {
378 INT arrowSize, thumbSize, thumbPos;
379 RECT rect;
380
381 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
382 &arrowSize, &thumbSize, &thumbPos );
383
384 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
385 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
386
387 if (vertical)
388 {
389 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
390 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
391 if (!thumbPos) return SCROLL_TOP_RECT;
392 pt.y -= rect.top;
393 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
394 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
395 }
396 else /* horizontal */
397 {
398 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
399 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
400 if (!thumbPos) return SCROLL_TOP_RECT;
401 pt.x -= rect.left;
402 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
403 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
404 }
405 return SCROLL_THUMB;
406 }
407
408
409 /***********************************************************************
410 * SCROLL_DrawArrows
411 *
412 * Draw the scroll bar arrows.
413 */
414 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
415 RECT *rect, INT arrowSize, BOOL vertical,
416 BOOL top_pressed, BOOL bottom_pressed )
417 {
418 RECT r;
419
420 r = *rect;
421 if( vertical )
422 r.bottom = r.top + arrowSize;
423 else
424 r.right = r.left + arrowSize;
425
426 DrawFrameControl( hdc, &r, DFC_SCROLL,
427 (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
428 | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
429 | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
430
431 r = *rect;
432 if( vertical )
433 r.top = r.bottom-arrowSize;
434 else
435 r.left = r.right-arrowSize;
436
437 DrawFrameControl( hdc, &r, DFC_SCROLL,
438 (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
439 | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
440 | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
441 }
442
443 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
444 INT arrowSize, INT thumbSize )
445 {
446 INT pos = SCROLL_TrackingPos;
447 INT max_size;
448
449 if( vertical )
450 max_size = rect->bottom - rect->top;
451 else
452 max_size = rect->right - rect->left;
453
454 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
455
456 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
457 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
458 else if( pos > max_size )
459 pos = max_size;
460
461 SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
462 rect, arrowSize, thumbSize, pos,
463 0, vertical, FALSE, FALSE );
464
465 SCROLL_MovingThumb = !SCROLL_MovingThumb;
466 }
467
468 /***********************************************************************
469 * SCROLL_DrawInterior
470 *
471 * Draw the scroll bar interior (everything except the arrows).
472 */
473 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
474 RECT *rect, INT arrowSize,
475 INT thumbSize, INT thumbPos,
476 UINT flags, BOOL vertical,
477 BOOL top_selected, BOOL bottom_selected )
478 {
479 RECT r;
480 HPEN hSavePen;
481 HBRUSH hSaveBrush,hBrush;
482
483 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
484 * The window-owned scrollbars need to call DEFWND_ControlColor
485 * to correctly setup default scrollbar colors
486 */
487 if (nBar == SB_CTL)
488 {
489 hBrush = (HBRUSH)SendMessageW( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
490 (WPARAM)hdc,(LPARAM)hwnd);
491 }
492 else
493 {
494 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
495 }
496
497 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
498 hSaveBrush = SelectObject( hdc, hBrush );
499
500 /* Calculate the scroll rectangle */
501 r = *rect;
502 if (vertical)
503 {
504 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
505 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
506 }
507 else
508 {
509 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
510 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
511 }
512
513 /* Draw the scroll rectangles and thumb */
514 if (!thumbPos) /* No thumb to draw */
515 {
516 PatBlt( hdc, r.left, r.top,
517 r.right - r.left, r.bottom - r.top,
518 PATCOPY );
519
520 /* cleanup and return */
521 SelectObject( hdc, hSavePen );
522 SelectObject( hdc, hSaveBrush );
523 return;
524 }
525
526 if (vertical)
527 {
528 PatBlt( hdc, r.left, r.top,
529 r.right - r.left,
530 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
531 top_selected ? 0x0f0000 : PATCOPY );
532 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
533 PatBlt( hdc, r.left, r.top + thumbSize,
534 r.right - r.left,
535 r.bottom - r.top - thumbSize,
536 bottom_selected ? 0x0f0000 : PATCOPY );
537 r.bottom = r.top + thumbSize;
538 }
539 else /* horizontal */
540 {
541 PatBlt( hdc, r.left, r.top,
542 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
543 r.bottom - r.top,
544 top_selected ? 0x0f0000 : PATCOPY );
545 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
546 PatBlt( hdc, r.left + thumbSize, r.top,
547 r.right - r.left - thumbSize,
548 r.bottom - r.top,
549 bottom_selected ? 0x0f0000 : PATCOPY );
550 r.right = r.left + thumbSize;
551 }
552
553 /* Draw the thumb */
554 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
555
556 /* cleanup */
557 SelectObject( hdc, hSavePen );
558 SelectObject( hdc, hSaveBrush );
559 }
560
561
562 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
563 RECT *rect, INT arrowSize,
564 INT thumbSize, INT thumbPos,
565 UINT flags, BOOL vertical,
566 BOOL top_selected, BOOL bottom_selected )
567 {
568 RECT r;
569 HPEN hSavePen;
570 HBRUSH hSaveBrush,hBrush;
571 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
572
573 if (Save_SCROLL_MovingThumb &&
574 (SCROLL_TrackingWin == hwnd) &&
575 (SCROLL_TrackingBar == nBar))
576 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
577
578 /* Select the correct brush and pen */
579
580 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
581 * The window-owned scrollbars need to call DEFWND_ControlColor
582 * to correctly setup default scrollbar colors
583 */
584 if (nBar == SB_CTL) {
585 hBrush = (HBRUSH)SendMessageW( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
586 (WPARAM)hdc,(LPARAM)hwnd);
587 } else {
588 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
589 }
590 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
591 hSaveBrush = SelectObject( hdc, hBrush );
592
593 /* Calculate the scroll rectangle */
594
595 r = *rect;
596 if (vertical)
597 {
598 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
599 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
600 }
601 else
602 {
603 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
604 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
605 }
606
607 /* Draw the scroll bar frame */
608
609 /* Draw the scroll rectangles and thumb */
610
611 if (!thumbPos) /* No thumb to draw */
612 {
613 PatBlt( hdc, r.left, r.top, r.right - r.left, r.bottom - r.top, PATCOPY );
614
615 /* cleanup and return */
616 SelectObject( hdc, hSavePen );
617 SelectObject( hdc, hSaveBrush );
618 return;
619 }
620
621 if (vertical)
622 {
623 PatBlt( hdc, r.left, r.top, r.right - r.left,
624 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
625 top_selected ? 0x0f0000 : PATCOPY );
626 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
627 PatBlt( hdc, r.left, r.top + thumbSize, r.right - r.left,
628 r.bottom - r.top - thumbSize,
629 bottom_selected ? 0x0f0000 : PATCOPY );
630 r.bottom = r.top + thumbSize;
631 }
632 else /* horizontal */
633 {
634 PatBlt( hdc, r.left, r.top,
635 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
636 r.bottom - r.top, top_selected ? 0x0f0000 : PATCOPY );
637 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
638 PatBlt( hdc, r.left + thumbSize, r.top, r.right - r.left - thumbSize,
639 r.bottom - r.top, bottom_selected ? 0x0f0000 : PATCOPY );
640 r.right = r.left + thumbSize;
641 }
642
643 /* Draw the thumb */
644
645 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
646 Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
647 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
648
649 if (Save_SCROLL_MovingThumb &&
650 (SCROLL_TrackingWin == hwnd) &&
651 (SCROLL_TrackingBar == nBar))
652 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
653
654 /* cleanup */
655 SelectObject( hdc, hSavePen );
656 SelectObject( hdc, hSaveBrush );
657 }
658
659
660 /***********************************************************************
661 * SCROLL_DrawScrollBar
662 *
663 * Redraw the whole scrollbar.
664 */
665 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
666 BOOL arrows, BOOL interior )
667 {
668 INT arrowSize, thumbSize, thumbPos;
669 RECT rect;
670 BOOL vertical;
671 SCROLLBAR_INFO *infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, TRUE );
672 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
673 DWORD style = GetWindowLongW( hwnd, GWL_STYLE );
674
675 if (!(hwnd = WIN_GetFullHandle( hwnd ))) return;
676
677 if (!infoPtr ||
678 ((nBar == SB_VERT) && !(style & WS_VSCROLL)) ||
679 ((nBar == SB_HORZ) && !(style & WS_HSCROLL))) return;
680 if (!WIN_IsWindowDrawable( hwnd, FALSE )) return;
681
682 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
683 &arrowSize, &thumbSize, &thumbPos );
684
685 /* do not draw if the scrollbar rectangle is empty */
686 if(IsRectEmpty(&rect)) return;
687
688 if (Save_SCROLL_MovingThumb &&
689 (SCROLL_TrackingWin == hwnd) &&
690 (SCROLL_TrackingBar == nBar))
691 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
692
693 /* Draw the arrows */
694
695 if (arrows && arrowSize)
696 {
697 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
698 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
699 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
700 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
701 else
702 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
703 FALSE, FALSE );
704 }
705 if( interior )
706 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
707 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
708
709 if (Save_SCROLL_MovingThumb &&
710 (SCROLL_TrackingWin == hwnd) &&
711 (SCROLL_TrackingBar == nBar))
712 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
713
714 /* if scroll bar has focus, reposition the caret */
715 if(hwnd==GetFocus() && (nBar==SB_CTL))
716 {
717 if (!vertical)
718 {
719 SetCaretPos(thumbPos+1, rect.top+1);
720 }
721 else
722 {
723 SetCaretPos(rect.top+1, thumbPos+1);
724 }
725 }
726 }
727
728 /***********************************************************************
729 * SCROLL_DrawSizeGrip
730 *
731 * Draw the size grip.
732 */
733 static void SCROLL_DrawSizeGrip( HWND hwnd, HDC hdc)
734 {
735 RECT rc;
736
737 GetClientRect( hwnd, &rc );
738 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
739 rc.left = max( rc.left, rc.right - GetSystemMetrics(SM_CXVSCROLL) - 1 );
740 rc.top = max( rc.top, rc.bottom - GetSystemMetrics(SM_CYHSCROLL) - 1 );
741 DrawFrameControl( hdc, &rc, DFC_SCROLL, DFCS_SCROLLSIZEGRIP );
742 }
743
744
745 /***********************************************************************
746 * SCROLL_RefreshScrollBar
747 *
748 * Repaint the scroll bar interior after a SetScrollRange() or
749 * SetScrollPos() call.
750 */
751 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
752 BOOL arrows, BOOL interior )
753 {
754 HDC hdc = GetDCEx( hwnd, 0,
755 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
756 if (!hdc) return;
757
758 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
759 ReleaseDC( hwnd, hdc );
760 }
761
762
763 /***********************************************************************
764 * SCROLL_HandleKbdEvent
765 *
766 * Handle a keyboard event (only for SB_CTL scrollbars with focus).
767 *
768 * PARAMS
769 * hwnd [I] Handle of window with scrollbar(s)
770 * wParam [I] Variable input including enable state
771 * lParam [I] Variable input including input point
772 */
773 static void SCROLL_HandleKbdEvent(HWND hwnd, WPARAM wParam, LPARAM lParam)
774 {
775 TRACE("hwnd=%p wParam=%d lParam=%ld\n", hwnd, wParam, lParam);
776
777 /* hide caret on first KEYDOWN to prevent flicker */
778 if ((lParam & PFD_DOUBLEBUFFER_DONTCARE) == 0)
779 HideCaret(hwnd);
780
781 switch(wParam)
782 {
783 case VK_PRIOR: wParam = SB_PAGEUP; break;
784 case VK_NEXT: wParam = SB_PAGEDOWN; break;
785 case VK_HOME: wParam = SB_TOP; break;
786 case VK_END: wParam = SB_BOTTOM; break;
787 case VK_UP: wParam = SB_LINEUP; break;
788 case VK_DOWN: wParam = SB_LINEDOWN; break;
789 case VK_LEFT: wParam = SB_LINEUP; break;
790 case VK_RIGHT: wParam = SB_LINEDOWN; break;
791 default: return;
792 }
793 SendMessageW(GetParent(hwnd),
794 ((GetWindowLongW( hwnd, GWL_STYLE ) & SBS_VERT) ?
795 WM_VSCROLL : WM_HSCROLL), wParam, (LPARAM)hwnd);
796 }
797
798
799 /***********************************************************************
800 * SCROLL_HandleScrollEvent
801 *
802 * Handle a mouse or timer event for the scrollbar.
803 * 'pt' is the location of the mouse event in client (for SB_CTL) or
804 * windows coordinates.
805 */
806 static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
807 {
808 /* Previous mouse position for timer events */
809 static POINT prevPt;
810 /* Thumb position when tracking started. */
811 static UINT trackThumbPos;
812 /* Position in the scroll-bar of the last button-down event. */
813 static INT lastClickPos;
814 /* Position in the scroll-bar of the last mouse event. */
815 static INT lastMousePos;
816
817 enum SCROLL_HITTEST hittest;
818 HWND hwndOwner, hwndCtl;
819 BOOL vertical;
820 INT arrowSize, thumbSize, thumbPos;
821 RECT rect;
822 HDC hdc;
823
824 SCROLLBAR_INFO *infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, FALSE );
825 if (!infoPtr) return;
826 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
827 return;
828
829 if (nBar == SB_CTL && (GetWindowLongW( hwnd, GWL_STYLE ) & (SBS_SIZEGRIP | SBS_SIZEBOX)))
830 {
831 switch(msg)
832 {
833 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
834 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
835 SetCapture( hwnd );
836 prevPt = pt;
837 SCROLL_trackHitTest = hittest = SCROLL_THUMB;
838 break;
839 case WM_MOUSEMOVE:
840 GetClientRect(GetParent(GetParent(hwnd)),&rect);
841 prevPt = pt;
842 break;
843 case WM_LBUTTONUP:
844 ReleaseCapture();
845 SCROLL_trackHitTest = hittest = SCROLL_NOWHERE;
846 if (hwnd==GetFocus()) ShowCaret(hwnd);
847 break;
848 case WM_SYSTIMER:
849 pt = prevPt;
850 break;
851 }
852 return;
853 }
854
855 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
856 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
857 &arrowSize, &thumbSize, &thumbPos );
858 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
859 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
860
861 switch(msg)
862 {
863 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
864 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
865 SCROLL_trackVertical = vertical;
866 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
867 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
868 lastMousePos = lastClickPos;
869 trackThumbPos = thumbPos;
870 prevPt = pt;
871 if (nBar == SB_CTL && (GetWindowLongW(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
872 SetCapture( hwnd );
873 break;
874
875 case WM_MOUSEMOVE:
876 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
877 prevPt = pt;
878 break;
879
880 case WM_LBUTTONUP:
881 hittest = SCROLL_NOWHERE;
882 ReleaseCapture();
883 /* if scrollbar has focus, show back caret */
884 if (hwnd==GetFocus()) ShowCaret(hwnd);
885 break;
886
887 case WM_SYSTIMER:
888 pt = prevPt;
889 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
890 break;
891
892 default:
893 return; /* Should never happen */
894 }
895
896 TRACE("Event: hwnd=%p bar=%d msg=%s pt=%ld,%ld hit=%d\n",
897 hwnd, nBar, SPY_GetMsgName(msg,hwnd), pt.x, pt.y, hittest );
898
899 switch(SCROLL_trackHitTest)
900 {
901 case SCROLL_NOWHERE: /* No tracking in progress */
902 break;
903
904 case SCROLL_TOP_ARROW:
905 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
906 (hittest == SCROLL_trackHitTest), FALSE );
907 if (hittest == SCROLL_trackHitTest)
908 {
909 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
910 {
911 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
912 SB_LINEUP, (LPARAM)hwndCtl );
913 }
914
915 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
916 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
917 (TIMERPROC)0 );
918 }
919 else KillSystemTimer( hwnd, SCROLL_TIMER );
920 break;
921
922 case SCROLL_TOP_RECT:
923 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
924 thumbPos, infoPtr->flags, vertical,
925 (hittest == SCROLL_trackHitTest), FALSE );
926 if (hittest == SCROLL_trackHitTest)
927 {
928 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
929 {
930 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
931 SB_PAGEUP, (LPARAM)hwndCtl );
932 }
933 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
934 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
935 (TIMERPROC)0 );
936 }
937 else KillSystemTimer( hwnd, SCROLL_TIMER );
938 break;
939
940 case SCROLL_THUMB:
941 if (msg == WM_LBUTTONDOWN)
942 {
943 SCROLL_TrackingWin = hwnd;
944 SCROLL_TrackingBar = nBar;
945 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
946 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
947 vertical,
948 SCROLL_TrackingPos );
949 if (!SCROLL_MovingThumb)
950 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
951 }
952 else if (msg == WM_LBUTTONUP)
953 {
954 if (SCROLL_MovingThumb)
955 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
956 SCROLL_TrackingWin = 0;
957 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
958 thumbPos, infoPtr->flags, vertical,
959 FALSE, FALSE );
960 }
961 else /* WM_MOUSEMOVE */
962 {
963 UINT pos;
964
965 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
966 else
967 {
968 pt = SCROLL_ClipPos( &rect, pt );
969 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
970 }
971 if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
972 {
973 if (SCROLL_MovingThumb)
974 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
975 arrowSize, thumbSize );
976 lastMousePos = pos;
977 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
978 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
979 vertical,
980 SCROLL_TrackingPos );
981 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
982 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
983 (LPARAM)hwndCtl );
984 if (!SCROLL_MovingThumb)
985 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
986 arrowSize, thumbSize );
987 }
988 }
989 break;
990
991 case SCROLL_BOTTOM_RECT:
992 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
993 thumbPos, infoPtr->flags, vertical,
994 FALSE, (hittest == SCROLL_trackHitTest) );
995 if (hittest == SCROLL_trackHitTest)
996 {
997 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
998 {
999 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1000 SB_PAGEDOWN, (LPARAM)hwndCtl );
1001 }
1002 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1003 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1004 (TIMERPROC)0 );
1005 }
1006 else KillSystemTimer( hwnd, SCROLL_TIMER );
1007 break;
1008
1009 case SCROLL_BOTTOM_ARROW:
1010 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1011 FALSE, (hittest == SCROLL_trackHitTest) );
1012 if (hittest == SCROLL_trackHitTest)
1013 {
1014 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1015 {
1016 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1017 SB_LINEDOWN, (LPARAM)hwndCtl );
1018 }
1019
1020 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1021 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1022 (TIMERPROC)0 );
1023 }
1024 else KillSystemTimer( hwnd, SCROLL_TIMER );
1025 break;
1026 }
1027
1028 if (msg == WM_LBUTTONDOWN)
1029 {
1030
1031 if (hittest == SCROLL_THUMB)
1032 {
1033 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1034 trackThumbPos + lastMousePos - lastClickPos );
1035 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1036 MAKEWPARAM( SB_THUMBTRACK, val ), (LPARAM)hwndCtl );
1037 }
1038 }
1039
1040 if (msg == WM_LBUTTONUP)
1041 {
1042 hittest = SCROLL_trackHitTest;
1043 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1044
1045 if (hittest == SCROLL_THUMB)
1046 {
1047 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1048 trackThumbPos + lastMousePos - lastClickPos );
1049 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1050 MAKEWPARAM( SB_THUMBPOSITION, val ), (LPARAM)hwndCtl );
1051 }
1052 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1053 SB_ENDSCROLL, (LPARAM)hwndCtl );
1054 }
1055
1056 ReleaseDC( hwnd, hdc );
1057 }
1058
1059
1060 /***********************************************************************
1061 * SCROLL_TrackScrollBar
1062 *
1063 * Track a mouse button press on a scroll-bar.
1064 * pt is in screen-coordinates for non-client scroll bars.
1065 */
1066 void SCROLL_TrackScrollBar( HWND hwnd, INT scrollbar, POINT pt )
1067 {
1068 MSG msg;
1069 INT xoffset = 0, yoffset = 0;
1070
1071 if (scrollbar != SB_CTL)
1072 {
1073 WND *wndPtr = WIN_GetPtr( hwnd );
1074 if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return;
1075 xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
1076 yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
1077 WIN_ReleasePtr( wndPtr );
1078 ScreenToClient( hwnd, &pt );
1079 pt.x += xoffset;
1080 pt.y += yoffset;
1081 }
1082
1083 SCROLL_HandleScrollEvent( hwnd, scrollbar, WM_LBUTTONDOWN, pt );
1084
1085 do
1086 {
1087 if (!GetMessageW( &msg, 0, 0, 0 )) break;
1088 if (CallMsgFilterW( &msg, MSGF_SCROLLBAR )) continue;
1089 if (msg.message == WM_LBUTTONUP ||
1090 msg.message == WM_MOUSEMOVE ||
1091 (msg.message == WM_SYSTIMER && msg.wParam == SCROLL_TIMER))
1092 {
1093 pt.x = (short)LOWORD(msg.lParam) + xoffset;
1094 pt.y = (short)HIWORD(msg.lParam) + yoffset;
1095 SCROLL_HandleScrollEvent( hwnd, scrollbar, msg.message, pt );
1096 }
1097 else
1098 {
1099 TranslateMessage( &msg );
1100 DispatchMessageW( &msg );
1101 }
1102 if (!IsWindow( hwnd ))
1103 {
1104 ReleaseCapture();
1105 break;
1106 }
1107 } while (msg.message != WM_LBUTTONUP);
1108 }
1109
1110
1111 /***********************************************************************
1112 * SCROLL_CreateScrollBar
1113 *
1114 * Create a scroll bar
1115 *
1116 * PARAMS
1117 * hwnd [I] Handle of window with scrollbar(s)
1118 * lpCreate [I] The style and place of the scroll bar
1119 */
1120 static void SCROLL_CreateScrollBar(HWND hwnd, LPCREATESTRUCTW lpCreate)
1121 {
1122 LPSCROLLBAR_INFO info = SCROLL_GetInternalInfo(hwnd, SB_CTL, TRUE);
1123 if (!info) return;
1124
1125 TRACE("hwnd=%p lpCreate=%p\n", hwnd, lpCreate);
1126
1127 if (lpCreate->style & WS_DISABLED)
1128 {
1129 info->flags = ESB_DISABLE_BOTH;
1130 TRACE("Created WS_DISABLED scrollbar\n");
1131 }
1132
1133
1134 if (lpCreate->style & (SBS_SIZEGRIP | SBS_SIZEBOX))
1135 {
1136 if (lpCreate->style & SBS_SIZEBOXTOPLEFTALIGN)
1137 MoveWindow( hwnd, lpCreate->x, lpCreate->y, GetSystemMetrics(SM_CXVSCROLL)+1,
1138 GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1139 else if(lpCreate->style & SBS_SIZEBOXBOTTOMRIGHTALIGN)
1140 MoveWindow( hwnd, lpCreate->x+lpCreate->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1141 lpCreate->y+lpCreate->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1142 GetSystemMetrics(SM_CXVSCROLL)+1,
1143 GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1144 }
1145 else if (lpCreate->style & SBS_VERT)
1146 {
1147 if (lpCreate->style & SBS_LEFTALIGN)
1148 MoveWindow( hwnd, lpCreate->x, lpCreate->y,
1149 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreate->cy, FALSE );
1150 else if (lpCreate->style & SBS_RIGHTALIGN)
1151 MoveWindow( hwnd,
1152 lpCreate->x+lpCreate->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1153 lpCreate->y,
1154 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreate->cy, FALSE );
1155 }
1156 else /* SBS_HORZ */
1157 {
1158 if (lpCreate->style & SBS_TOPALIGN)
1159 MoveWindow( hwnd, lpCreate->x, lpCreate->y,
1160 lpCreate->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1161 else if (lpCreate->style & SBS_BOTTOMALIGN)
1162 MoveWindow( hwnd,
1163 lpCreate->x,
1164 lpCreate->y+lpCreate->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1165 lpCreate->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1166 }
1167 }
1168
1169
1170 /*************************************************************************
1171 * SCROLL_GetScrollInfo
1172 *
1173 * Internal helper for the API function
1174 *
1175 * PARAMS
1176 * hwnd [I] Handle of window with scrollbar(s)
1177 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1178 * info [IO] fMask specifies which values to retrieve
1179 *
1180 * RETURNS
1181 * FALSE if requested field not filled (f.i. scroll bar does not exist)
1182 */
1183 static BOOL SCROLL_GetScrollInfo(HWND hwnd, INT nBar, LPSCROLLINFO info)
1184 {
1185 LPSCROLLBAR_INFO infoPtr;
1186
1187 /* handle invalid data structure */
1188 if (!SCROLL_ScrollInfoValid(info)
1189 || !(infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE)))
1190 return FALSE;
1191
1192 /* fill in the desired scroll info structure */
1193 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->page;
1194 if (info->fMask & SIF_POS) info->nPos = infoPtr->curVal;
1195 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1196 info->nTrackPos = (SCROLL_TrackingWin == WIN_GetFullHandle(hwnd)) ? SCROLL_TrackingVal : infoPtr->curVal;
1197 if (info->fMask & SIF_RANGE)
1198 {
1199 info->nMin = infoPtr->minVal;
1200 info->nMax = infoPtr->maxVal;
1201 }
1202
1203 return (info->fMask & SIF_ALL) != 0;
1204 }
1205
1206
1207 /*************************************************************************
1208 * SCROLL_GetScrollBarInfo
1209 *
1210 * Internal helper for the API function
1211 *
1212 * PARAMS
1213 * hwnd [I] Handle of window with scrollbar(s)
1214 * idObject [I] One of OBJID_CLIENT, OBJID_HSCROLL, or OBJID_VSCROLL
1215 * info [IO] cbSize specifies the size of the structure
1216 *
1217 * RETURNS
1218 * FALSE if failed
1219 */
1220 static BOOL SCROLL_GetScrollBarInfo(HWND hwnd, LONG idObject, LPSCROLLBARINFO info)
1221 {
1222 LPSCROLLBAR_INFO infoPtr;
1223 INT nBar;
1224 INT nDummy;
1225 DWORD style = GetWindowLongW(hwnd, GWL_STYLE);
1226 BOOL pressed;
1227
1228 switch (idObject)
1229 {
1230 case OBJID_CLIENT: nBar = SB_CTL; break;
1231 case OBJID_HSCROLL: nBar = SB_HORZ; break;
1232 case OBJID_VSCROLL: nBar = SB_VERT; break;
1233 default: return FALSE;
1234 }
1235
1236 /* handle invalid data structure */
1237 if (info->cbSize != sizeof(*info))
1238 return FALSE;
1239
1240 SCROLL_GetScrollBarRect(hwnd, nBar, &info->rcScrollBar, &nDummy,
1241 &info->dxyLineButton, &info->xyThumbTop);
1242
1243 info->xyThumbBottom = info->xyThumbTop + info->dxyLineButton;
1244
1245 infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, TRUE);
1246
1247 /* Scroll bar state */
1248 info->rgstate[0] = 0;
1249 if ((nBar == SB_HORZ && !(style & WS_HSCROLL))
1250 || (nBar == SB_VERT && !(style & WS_VSCROLL)))
1251 info->rgstate[0] |= STATE_SYSTEM_INVISIBLE;
1252 if (infoPtr->minVal >= infoPtr->maxVal - max(infoPtr->page - 1, 0))
1253 {
1254 if (!(info->rgstate[0] & STATE_SYSTEM_INVISIBLE))
1255 info->rgstate[0] |= STATE_SYSTEM_UNAVAILABLE;
1256 else
1257 info->rgstate[0] |= STATE_SYSTEM_OFFSCREEN;
1258 }
1259 if (nBar == SB_CTL && !IsWindowEnabled(hwnd))
1260 info->rgstate[0] |= STATE_SYSTEM_UNAVAILABLE;
1261
1262 pressed = ((nBar == SB_VERT) == SCROLL_trackVertical && GetCapture() == hwnd);
1263
1264 /* Top/left arrow button state. MSDN says top/right, but I don't believe it */
1265 info->rgstate[1] = 0;
1266 if (pressed && SCROLL_trackHitTest == SCROLL_TOP_ARROW)
1267 info->rgstate[1] |= STATE_SYSTEM_PRESSED;
1268 if (infoPtr->flags & ESB_DISABLE_LTUP)
1269 info->rgstate[1] |= STATE_SYSTEM_UNAVAILABLE;
1270
1271 /* Page up/left region state. MSDN says up/right, but I don't believe it */
1272 info->rgstate[2] = 0;
1273 if (infoPtr->curVal == infoPtr->minVal)
1274 info->rgstate[2] |= STATE_SYSTEM_INVISIBLE;
1275 if (pressed && SCROLL_trackHitTest == SCROLL_TOP_RECT)
1276 info->rgstate[2] |= STATE_SYSTEM_PRESSED;
1277
1278 /* Thumb state */
1279 info->rgstate[3] = 0;
1280 if (pressed && SCROLL_trackHitTest == SCROLL_THUMB)
1281 info->rgstate[3] |= STATE_SYSTEM_PRESSED;
1282
1283 /* Page down/right region state. MSDN says down/left, but I don't believe it */
1284 info->rgstate[4] = 0;
1285 if (infoPtr->curVal >= infoPtr->maxVal - 1)
1286 info->rgstate[4] |= STATE_SYSTEM_INVISIBLE;
1287 if (pressed && SCROLL_trackHitTest == SCROLL_BOTTOM_RECT)
1288 info->rgstate[4] |= STATE_SYSTEM_PRESSED;
1289
1290 /* Bottom/right arrow button state. MSDN says bottom/left, but I don't believe it */
1291 info->rgstate[5] = 0;
1292 if (pressed && SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW)
1293 info->rgstate[5] |= STATE_SYSTEM_PRESSED;
1294 if (infoPtr->flags & ESB_DISABLE_RTDN)
1295 info->rgstate[5] |= STATE_SYSTEM_UNAVAILABLE;
1296
1297 return TRUE;
1298 }
1299
1300
1301 /*************************************************************************
1302 * SCROLL_GetScrollPos
1303 *
1304 * Internal helper for the API function
1305 *
1306 * PARAMS
1307 * hwnd [I] Handle of window with scrollbar(s)
1308 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1309 */
1310 static INT SCROLL_GetScrollPos(HWND hwnd, INT nBar)
1311 {
1312 LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
1313 return infoPtr ? infoPtr->curVal: 0;
1314 }
1315
1316
1317 /*************************************************************************
1318 * SCROLL_GetScrollRange
1319 *
1320 * Internal helper for the API function
1321 *
1322 * PARAMS
1323 * hwnd [I] Handle of window with scrollbar(s)
1324 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1325 * lpMin [O] Where to store minimum value
1326 * lpMax [O] Where to store maximum value
1327 *
1328 * RETURNS
1329 * Success: TRUE
1330 * Failure: FALSE
1331 */
1332 static BOOL SCROLL_GetScrollRange(HWND hwnd, INT nBar, LPINT lpMin, LPINT lpMax)
1333 {
1334 LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
1335
1336 if (lpMin) *lpMin = infoPtr ? infoPtr->minVal : 0;
1337 if (lpMax) *lpMax = infoPtr ? infoPtr->maxVal : 0;
1338
1339 return TRUE;
1340 }
1341
1342
1343 /*************************************************************************
1344 * SCROLL_SetScrollRange
1345 *
1346 * PARAMS
1347 * hwnd [I] Handle of window with scrollbar(s)
1348 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1349 * lpMin [I] Minimum value
1350 * lpMax [I] Maximum value
1351 *
1352 */
1353 static BOOL SCROLL_SetScrollRange(HWND hwnd, INT nBar, INT minVal, INT maxVal)
1354 {
1355 LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
1356
1357 TRACE("hwnd=%p nBar=%d min=%d max=%d\n", hwnd, nBar, minVal, maxVal);
1358
1359 if (infoPtr)
1360 {
1361 infoPtr->minVal = minVal;
1362 infoPtr->maxVal = maxVal;
1363 }
1364 return TRUE;
1365 }
1366
1367
1368 /***********************************************************************
1369 * ScrollBarWndProc
1370 */
1371 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1372 {
1373 if (!IsWindow( hwnd )) return 0;
1374
1375 switch(message)
1376 {
1377 case WM_CREATE:
1378 SCROLL_CreateScrollBar(hwnd, (LPCREATESTRUCTW)lParam);
1379 break;
1380
1381 case WM_ENABLE:
1382 {
1383 SCROLLBAR_INFO *infoPtr;
1384 if ((infoPtr = SCROLL_GetInternalInfo( hwnd, SB_CTL, FALSE )))
1385 {
1386 infoPtr->flags = wParam ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH;
1387 SCROLL_RefreshScrollBar(hwnd, SB_CTL, TRUE, TRUE);
1388 }
1389 }
1390 return 0;
1391
1392 case WM_LBUTTONDBLCLK:
1393 case WM_LBUTTONDOWN:
1394 {
1395 POINT pt;
1396 pt.x = (short)LOWORD(lParam);
1397 pt.y = (short)HIWORD(lParam);
1398 SCROLL_TrackScrollBar( hwnd, SB_CTL, pt );
1399 }
1400 break;
1401 case WM_LBUTTONUP:
1402 case WM_MOUSEMOVE:
1403 case WM_SYSTIMER:
1404 {
1405 POINT pt;
1406 pt.x = (short)LOWORD(lParam);
1407 pt.y = (short)HIWORD(lParam);
1408 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1409 }
1410 break;
1411
1412 case WM_KEYDOWN:
1413 SCROLL_HandleKbdEvent(hwnd, wParam, lParam);
1414 break;
1415
1416 case WM_KEYUP:
1417 ShowCaret(hwnd);
1418 break;
1419
1420 case WM_SETFOCUS:
1421 {
1422 /* Create a caret when a ScrollBar get focus */
1423 RECT rect;
1424 int arrowSize, thumbSize, thumbPos, vertical;
1425 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1426 &arrowSize, &thumbSize, &thumbPos );
1427 if (!vertical)
1428 {
1429 CreateCaret(hwnd, (HBITMAP)1, thumbSize-2, rect.bottom-rect.top-2);
1430 SetCaretPos(thumbPos+1, rect.top+1);
1431 }
1432 else
1433 {
1434 CreateCaret(hwnd, (HBITMAP)1, rect.right-rect.left-2,thumbSize-2);
1435 SetCaretPos(rect.top+1, thumbPos+1);
1436 }
1437 ShowCaret(hwnd);
1438 }
1439 break;
1440
1441 case WM_KILLFOCUS:
1442 {
1443 RECT rect;
1444 int arrowSize, thumbSize, thumbPos, vertical;
1445 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1446 if (!vertical){
1447 rect.left=thumbPos+1;
1448 rect.right=rect.left+thumbSize;
1449 }
1450 else
1451 {
1452 rect.top=thumbPos+1;
1453 rect.bottom=rect.top+thumbSize;
1454 }
1455 HideCaret(hwnd);
1456 InvalidateRect(hwnd,&rect,0);
1457 DestroyCaret();
1458 }
1459 break;
1460
1461 case WM_ERASEBKGND:
1462 return 1;
1463
1464 case WM_GETDLGCODE:
1465 return DLGC_WANTARROWS; /* Windows returns this value */
1466
1467 case WM_PAINT:
1468 {
1469 PAINTSTRUCT ps;
1470 HDC hdc = wParam ? (HDC)wParam : BeginPaint(hwnd, &ps);
1471 if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEGRIP)
1472 {
1473 SCROLL_DrawSizeGrip( hwnd, hdc);
1474 }
1475 else if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEBOX)
1476 {
1477 RECT rc;
1478 GetClientRect( hwnd, &rc );
1479 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
1480 }
1481 else
1482 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1483 if (!wParam) EndPaint(hwnd, &ps);
1484 }
1485 break;
1486
1487 case SBM_SETPOS16:
1488 case SBM_SETPOS:
1489 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1490
1491 case SBM_GETPOS16:
1492 case SBM_GETPOS:
1493 return SCROLL_GetScrollPos(hwnd, SB_CTL);
1494
1495 case SBM_SETRANGE16:
1496 if (wParam) message = SBM_SETRANGEREDRAW;
1497 wParam = LOWORD(lParam);
1498 lParam = HIWORD(lParam);
1499 /* fall through */
1500 case SBM_SETRANGEREDRAW:
1501 case SBM_SETRANGE:
1502 {
1503 INT oldPos = SCROLL_GetScrollPos( hwnd, SB_CTL );
1504 SCROLL_SetScrollRange( hwnd, SB_CTL, wParam, lParam );
1505 if (message == SBM_SETRANGEREDRAW)
1506 SCROLL_RefreshScrollBar( hwnd, SB_CTL, TRUE, TRUE );
1507 if (oldPos != SCROLL_GetScrollPos( hwnd, SB_CTL )) return oldPos;
1508 }
1509 return 0;
1510
1511 case SBM_GETRANGE16:
1512 {
1513 INT min, max;
1514
1515 SCROLL_GetScrollRange(hwnd, SB_CTL, &min, &max);
1516 return MAKELRESULT(min, max);
1517 }
1518
1519 case SBM_GETRANGE:
1520 return SCROLL_GetScrollRange(hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam);
1521
1522 case SBM_ENABLE_ARROWS16:
1523 case SBM_ENABLE_ARROWS:
1524 return EnableScrollBar( hwnd, SB_CTL, wParam );
1525
1526 case SBM_SETSCROLLINFO:
1527 return SCROLL_SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1528
1529 case SBM_GETSCROLLINFO:
1530 return SCROLL_GetScrollInfo(hwnd, SB_CTL, (SCROLLINFO *)lParam);
1531
1532 case SBM_GETSCROLLBARINFO:
1533 return SCROLL_GetScrollBarInfo(hwnd, OBJID_CLIENT, (SCROLLBARINFO *)lParam);
1534
1535 case 0x00e5:
1536 case 0x00e7:
1537 case 0x00e8:
1538 case 0x00ec:
1539 case 0x00ed:
1540 case 0x00ee:
1541 case 0x00ef:
1542 ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1543 message, wParam, lParam );
1544 break;
1545
1546 default:
1547 if (message >= WM_USER)
1548 WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1549 message, wParam, lParam );
1550 return DefWindowProcW( hwnd, message, wParam, lParam );
1551 }
1552 return 0;
1553 }
1554
1555
1556 /*************************************************************************
1557 * SetScrollInfo (USER32.@)
1558 *
1559 * SetScrollInfo can be used to set the position, upper bound,
1560 * lower bound, and page size of a scrollbar control.
1561 *
1562 * PARAMS
1563 * hwnd [I] Handle of window with scrollbar(s)
1564 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1565 * info [I] Specifies what to change and new values
1566 * bRedraw [I] Should scrollbar be redrawn afterwards?
1567 *
1568 * RETURNS
1569 * Scrollbar position
1570 *
1571 * NOTE
1572 * For 100 lines of text to be displayed in a window of 25 lines,
1573 * one would for instance use info->nMin=0, info->nMax=75
1574 * (corresponding to the 76 different positions of the window on
1575 * the text), and info->nPage=25.
1576 */
1577 INT WINAPI SetScrollInfo(HWND hwnd, INT nBar, const SCROLLINFO *info, BOOL bRedraw)
1578 {
1579 TRACE("hwnd=%p nBar=%d info=%p, bRedraw=%d\n", hwnd, nBar, info, bRedraw);
1580
1581 /* Refer SB_CTL requests to the window */
1582 if (nBar == SB_CTL)
1583 return SendMessageW(hwnd, SBM_SETSCROLLINFO, bRedraw, (LPARAM)info);
1584 else
1585 return SCROLL_SetScrollInfo( hwnd, nBar, info, bRedraw );
1586 }
1587
1588 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar, LPCSCROLLINFO info, BOOL bRedraw )
1589 {
1590 /* Update the scrollbar state and set action flags according to
1591 * what has to be done graphics wise. */
1592
1593 SCROLLBAR_INFO *infoPtr;
1594 UINT new_flags;
1595 INT action = 0;
1596
1597 /* handle invalid data structure */
1598 if (!SCROLL_ScrollInfoValid(info)
1599 || !(infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, TRUE)))
1600 return 0;
1601
1602 if (TRACE_ON(scroll))
1603 {
1604 TRACE("hwnd=%p bar=%d", hwnd, nBar);
1605 if (info->fMask & SIF_PAGE) TRACE( " page=%d", info->nPage );
1606 if (info->fMask & SIF_POS) TRACE( " pos=%d", info->nPos );
1607 if (info->fMask & SIF_RANGE) TRACE( " min=%d max=%d", info->nMin, info->nMax );
1608 TRACE("\n");
1609 }
1610
1611 /* Set the page size */
1612
1613 if (info->fMask & SIF_PAGE)
1614 {
1615 if( infoPtr->page != info->nPage && info->nPage >= 0)
1616 {
1617 infoPtr->page = info->nPage;
1618 action |= SA_SSI_REFRESH;
1619 }
1620 }
1621
1622 /* Set the scroll pos */
1623
1624 if (info->fMask & SIF_POS)
1625 {
1626 if( infoPtr->curVal != info->nPos )
1627 {
1628 infoPtr->curVal = info->nPos;
1629 action |= SA_SSI_REFRESH;
1630 }
1631 }
1632
1633 /* Set the scroll range */
1634
1635 if (info->fMask & SIF_RANGE)
1636 {
1637 /* Invalid range -> range is set to (0,0) */
1638 if ((info->nMin > info->nMax) ||
1639 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1640 {
1641 action |= SA_SSI_REFRESH;
1642 infoPtr->minVal = 0;
1643 infoPtr->maxVal = 0;
1644 }
1645 else
1646 {
1647 if( infoPtr->minVal != info->nMin ||
1648 infoPtr->maxVal != info->nMax )
1649 {
1650 action |= SA_SSI_REFRESH;
1651 infoPtr->minVal = info->nMin;
1652 infoPtr->maxVal = info->nMax;
1653 }
1654 }
1655 }
1656
1657 /* Make sure the page size is valid */
1658 if (infoPtr->page < 0) infoPtr->page = 0;
1659 else if (infoPtr->page > infoPtr->maxVal - infoPtr->minVal + 1 )
1660 infoPtr->page = infoPtr->maxVal - infoPtr->minVal + 1;
1661
1662 /* Make sure the pos is inside the range */
1663
1664 if (infoPtr->curVal < infoPtr->minVal)
1665 infoPtr->curVal = infoPtr->minVal;
1666 else if (infoPtr->curVal > infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1667 infoPtr->curVal = infoPtr->maxVal - max( infoPtr->page-1, 0 );
1668
1669 TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1670 infoPtr->page, infoPtr->curVal,
1671 infoPtr->minVal, infoPtr->maxVal );
1672
1673 /* don't change the scrollbar state if SetScrollInfo
1674 * is just called with SIF_DISABLENOSCROLL
1675 */
1676 if(!(info->fMask & SIF_ALL)) goto done;
1677
1678 /* Check if the scrollbar should be hidden or disabled */
1679
1680 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1681 {
1682 new_flags = infoPtr->flags;
1683 if (infoPtr->minVal >= infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1684 {
1685 /* Hide or disable scroll-bar */
1686 if (info->fMask & SIF_DISABLENOSCROLL)
1687 {
1688 new_flags = ESB_DISABLE_BOTH;
1689 action |= SA_SSI_REFRESH;
1690 }
1691 else if ((nBar != SB_CTL) && (action & SA_SSI_REFRESH))
1692 {
1693 action = SA_SSI_HIDE;
1694 }
1695 }
1696 else /* Show and enable scroll-bar only if no page only changed. */
1697 if (info->fMask != SIF_PAGE)
1698 {
1699 new_flags = ESB_ENABLE_BOTH;
1700 if ((nBar != SB_CTL) && ( (action & SA_SSI_REFRESH) ))
1701 action |= SA_SSI_SHOW;
1702 }
1703
1704 if (infoPtr->flags != new_flags) /* check arrow flags */
1705 {
1706 infoPtr->flags = new_flags;
1707 action |= SA_SSI_REPAINT_ARROWS;
1708 }
1709 }
1710
1711 done:
1712 if( action & SA_SSI_HIDE )
1713 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1714 else
1715 {
1716 if( action & SA_SSI_SHOW )
1717 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1718 return infoPtr->curVal; /* SetWindowPos() already did the painting */
1719
1720 if( bRedraw )
1721 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1722 else if( action & SA_SSI_REPAINT_ARROWS )
1723 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1724 }
1725
1726 /* Return current position */
1727 return infoPtr->curVal;
1728 }
1729
1730
1731 /*************************************************************************
1732 * GetScrollInfo (USER32.@)
1733 *
1734 * GetScrollInfo can be used to retrieve the position, upper bound,
1735 * lower bound, and page size of a scrollbar control.
1736 *
1737 * PARAMS
1738 * hwnd [I] Handle of window with scrollbar(s)
1739 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1740 * info [IO] fMask specifies which values to retrieve
1741 *
1742 * RETURNS
1743 * TRUE if SCROLLINFO is filled
1744 * ( if nBar is SB_CTL, GetScrollInfo returns TRUE even if nothing
1745 * is filled)
1746 */
1747 BOOL WINAPI GetScrollInfo(HWND hwnd, INT nBar, LPSCROLLINFO info)
1748 {
1749 TRACE("hwnd=%p nBar=%d info=%p\n", hwnd, nBar, info);
1750
1751 /* Refer SB_CTL requests to the window */
1752 if (nBar == SB_CTL)
1753 {
1754 SendMessageW(hwnd, SBM_GETSCROLLINFO, (WPARAM)0, (LPARAM)info);
1755 return TRUE;
1756 }
1757 return SCROLL_GetScrollInfo(hwnd, nBar, info);
1758 }
1759
1760
1761 /*************************************************************************
1762 * GetScrollBarInfo (USER32.@)
1763 *
1764 * GetScrollBarInfo can be used to retrieve information about a scrollbar
1765 * control.
1766 *
1767 * PARAMS
1768 * hwnd [I] Handle of window with scrollbar(s)
1769 * idObject [I] One of OBJID_CLIENT, OBJID_HSCROLL, or OBJID_VSCROLL
1770 * info [IO] cbSize specifies the size of SCROLLBARINFO
1771 *
1772 * RETURNS
1773 * TRUE if success
1774 */
1775 BOOL WINAPI GetScrollBarInfo(HWND hwnd, LONG idObject, LPSCROLLBARINFO info)
1776 {
1777 TRACE("hwnd=%p idObject=%ld info=%p\n", hwnd, idObject, info);
1778
1779 /* Refer OBJID_CLIENT requests to the window */
1780 if (idObject == OBJID_CLIENT)
1781 return SendMessageW(hwnd, SBM_GETSCROLLBARINFO, (WPARAM)0, (LPARAM)info);
1782 else
1783 return SCROLL_GetScrollBarInfo(hwnd, idObject, info);
1784 }
1785
1786
1787 /*************************************************************************
1788 * SetScrollPos (USER32.@)
1789 *
1790 * Sets the current position of the scroll thumb.
1791 *
1792 * PARAMS
1793 * hwnd [I] Handle of window with scrollbar(s)
1794 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1795 * nPos [I] New value
1796 * bRedraw [I] Should scrollbar be redrawn afterwards?
1797 *
1798 * RETURNS
1799 * Success: Scrollbar position
1800 * Failure: 0
1801 *
1802 * REMARKS
1803 * Note the ambiguity when 0 is returned. Use GetLastError
1804 * to make sure there was an error (and to know which one).
1805 */
1806 INT WINAPI SetScrollPos( HWND hwnd, INT nBar, INT nPos, BOOL bRedraw)
1807 {
1808 SCROLLINFO info;
1809 SCROLLBAR_INFO *infoPtr;
1810 INT oldPos;
1811
1812 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, FALSE ))) return 0;
1813 oldPos = infoPtr->curVal;
1814 info.cbSize = sizeof(info);
1815 info.nPos = nPos;
1816 info.fMask = SIF_POS;
1817 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1818 return oldPos;
1819 }
1820
1821
1822 /*************************************************************************
1823 * GetScrollPos (USER32.@)
1824 *
1825 * Gets the current position of the scroll thumb.
1826 *
1827 * PARAMS
1828 * hwnd [I] Handle of window with scrollbar(s)
1829 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1830 *
1831 * RETURNS
1832 * Success: Current position
1833 * Failure: 0
1834 *
1835 * REMARKS
1836 * There is ambiguity when 0 is returned. Use GetLastError
1837 * to make sure there was an error (and to know which one).
1838 */
1839 INT WINAPI GetScrollPos(HWND hwnd, INT nBar)
1840 {
1841 TRACE("hwnd=%p nBar=%d\n", hwnd, nBar);
1842
1843 /* Refer SB_CTL requests to the window */
1844 if (nBar == SB_CTL)
1845 return SendMessageW(hwnd, SBM_GETPOS, (WPARAM)0, (LPARAM)0);
1846 else
1847 return SCROLL_GetScrollPos(hwnd, nBar);
1848 }
1849
1850
1851 /*************************************************************************
1852 * SetScrollRange (USER32.@)
1853 * The SetScrollRange function sets the minimum and maximum scroll box positions
1854 * If nMinPos and nMaxPos is the same value, the scroll bar will hide
1855 *
1856 * Sets the range of the scroll bar.
1857 *
1858 * PARAMS
1859 * hwnd [I] Handle of window with scrollbar(s)
1860 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1861 * minVal [I] New minimum value
1862 * maxVal [I] New Maximum value
1863 * bRedraw [I] Should scrollbar be redrawn afterwards?
1864 *
1865 * RETURNS
1866 * Success: TRUE
1867 * Failure: FALSE
1868 */
1869 BOOL WINAPI SetScrollRange(HWND hwnd, INT nBar, INT minVal, INT maxVal, BOOL bRedraw)
1870 {
1871 SCROLLINFO info;
1872
1873 TRACE("hwnd=%p nBar=%d min=%d max=%d, bRedraw=%d\n", hwnd, nBar, minVal, maxVal, bRedraw);
1874
1875 info.cbSize = sizeof(info);
1876 info.fMask = SIF_RANGE;
1877 info.nMin = minVal;
1878 info.nMax = maxVal;
1879 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1880 return TRUE;
1881 }
1882
1883
1884 /*************************************************************************
1885 * SCROLL_SetNCSbState
1886 *
1887 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1888 */
1889 INT SCROLL_SetNCSbState(HWND hwnd, int vMin, int vMax, int vPos,
1890 int hMin, int hMax, int hPos)
1891 {
1892 SCROLLINFO vInfo, hInfo;
1893
1894 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1895 vInfo.nMin = vMin;
1896 vInfo.nMax = vMax;
1897 vInfo.nPos = vPos;
1898 hInfo.nMin = hMin;
1899 hInfo.nMax = hMax;
1900 hInfo.nPos = hPos;
1901 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1902
1903 SCROLL_SetScrollInfo( hwnd, SB_VERT, &vInfo, TRUE );
1904 SCROLL_SetScrollInfo( hwnd, SB_HORZ, &hInfo, TRUE );
1905
1906 return 0;
1907 }
1908
1909
1910 /*************************************************************************
1911 * GetScrollRange (USER32.@)
1912 *
1913 * Gets the range of the scroll bar.
1914 *
1915 * PARAMS
1916 * hwnd [I] Handle of window with scrollbar(s)
1917 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1918 * lpMin [O] Where to store minimum value
1919 * lpMax [O] Where to store maximum value
1920 *
1921 * RETURNS
1922 * TRUE if values is filled
1923 */
1924 BOOL WINAPI GetScrollRange(HWND hwnd, INT nBar, LPINT lpMin, LPINT lpMax)
1925 {
1926 TRACE("hwnd=%p nBar=%d lpMin=%p lpMax=%p\n", hwnd, nBar, lpMin, lpMax);
1927
1928 /* Refer SB_CTL requests to the window */
1929 if (nBar == SB_CTL)
1930 SendMessageW(hwnd, SBM_GETRANGE, (WPARAM)lpMin, (LPARAM)lpMax);
1931 else
1932 SCROLL_GetScrollRange(hwnd, nBar, lpMin, lpMax);
1933
1934 return TRUE;
1935 }
1936
1937
1938 /*************************************************************************
1939 * SCROLL_ShowScrollBar()
1940 *
1941 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1942 */
1943 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar, BOOL fShowH, BOOL fShowV )
1944 {
1945 ULONG old_style, set_bits = 0, clear_bits = 0;
1946
1947 TRACE("hwnd=%p bar=%d horz=%d, vert=%d\n", hwnd, nBar, fShowH, fShowV );
1948
1949 switch(nBar)
1950 {
1951 case SB_CTL:
1952 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1953 return TRUE;
1954
1955 case SB_BOTH:
1956 case SB_HORZ:
1957 if (fShowH) set_bits |= WS_HSCROLL;
1958 else clear_bits |= WS_HSCROLL;
1959 if( nBar == SB_HORZ ) break;
1960 /* fall through */
1961 case SB_VERT:
1962 if (fShowV) set_bits |= WS_VSCROLL;
1963 else clear_bits |= WS_VSCROLL;
1964 break;
1965
1966 default:
1967 return FALSE; /* Nothing to do! */
1968 }
1969
1970 old_style = WIN_SetStyle( hwnd, set_bits, clear_bits );
1971 if ((old_style & clear_bits) != 0 || (old_style & set_bits) != set_bits)
1972 {
1973 /* frame has been changed, let the window redraw itself */
1974 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1975 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1976 return TRUE;
1977 }
1978 return FALSE; /* no frame changes */
1979 }
1980
1981
1982 /*************************************************************************
1983 * ShowScrollBar (USER32.@)
1984 *
1985 * Shows or hides the scroll bar.
1986 *
1987 * PARAMS
1988 * hwnd [I] Handle of window with scrollbar(s)
1989 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1990 * fShow [I] TRUE = show, FALSE = hide
1991 *
1992 * RETURNS
1993 * Success: TRUE
1994 * Failure: FALSE
1995 */
1996 BOOL WINAPI ShowScrollBar(HWND hwnd, INT nBar, BOOL fShow)
1997 {
1998 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1999 (nBar == SB_HORZ) ? 0 : fShow );
2000 return TRUE;
2001 }
2002
2003
2004 /*************************************************************************
2005 * EnableScrollBar (USER32.@)
2006 *
2007 * Enables or disables the scroll bars.
2008 */
2009 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
2010 {
2011 BOOL bFineWithMe;
2012 SCROLLBAR_INFO *infoPtr;
2013
2014 TRACE("%p %d %d\n", hwnd, nBar, flags );
2015
2016 flags &= ESB_DISABLE_BOTH;
2017
2018 if (nBar == SB_BOTH)
2019 {
2020 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, SB_VERT, TRUE ))) return FALSE;
2021 if (!(bFineWithMe = (infoPtr->flags == flags)) )
2022 {
2023 infoPtr->flags = flags;
2024 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
2025 }
2026 nBar = SB_HORZ;
2027 }
2028 else
2029 bFineWithMe = TRUE;
2030
2031 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, TRUE ))) return FALSE;
2032 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
2033 infoPtr->flags = flags;
2034
2035 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
2036 return TRUE;
2037 }
Maarten's multimedia branch