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po: Update Lithuanian translation.
[wine/multimedia.git] / dlls / user32 / scroll.c
blob6e6bc37bfc8fa94662cc6931dd3f8ddfca4dc513
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., 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. 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 "controls.h"
37 #include "win.h"
38 #include "wine/debug.h"
39 #include "user_private.h"
40
41 WINE_DEFAULT_DEBUG_CHANNEL(scroll);
42
43 /* data for a single scroll bar */
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 /* data for window that has (one or two) scroll bars */
54 typedef struct
55 {
56 SCROLLBAR_INFO horz;
57 SCROLLBAR_INFO vert;
58 } WINSCROLLBAR_INFO, *LPWINSCROLLBAR_INFO;
59
60 /* Minimum size of the rectangle between the arrows */
61 #define SCROLL_MIN_RECT 4
62
63 /* Minimum size of the thumb in pixels */
64 #define SCROLL_MIN_THUMB 6
65
66 /* Overlap between arrows and thumb */
67 #define SCROLL_ARROW_THUMB_OVERLAP 0
68
69 /* Delay (in ms) before first repetition when holding the button down */
70 #define SCROLL_FIRST_DELAY 200
71
72 /* Delay (in ms) between scroll repetitions */
73 #define SCROLL_REPEAT_DELAY 50
74
75 /* Scroll timer id */
76 #define SCROLL_TIMER 0
77
78 /* Scroll-bar hit testing */
79 enum SCROLL_HITTEST
80 {
81 SCROLL_NOWHERE, /* Outside the scroll bar */
82 SCROLL_TOP_ARROW, /* Top or left arrow */
83 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
84 SCROLL_THUMB, /* Thumb rectangle */
85 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
86 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
87 };
88
89 /* What to do after SCROLL_SetScrollInfo() */
90 #define SA_SSI_HIDE 0x0001
91 #define SA_SSI_SHOW 0x0002
92 #define SA_SSI_REFRESH 0x0004
93 #define SA_SSI_REPAINT_ARROWS 0x0008
94
95 /* Thumb-tracking info */
96 static HWND SCROLL_TrackingWin = 0;
97 static INT SCROLL_TrackingBar = 0;
98 static INT SCROLL_TrackingPos = 0;
99 static INT SCROLL_TrackingVal = 0;
100 /* Hit test code of the last button-down event */
101 static enum SCROLL_HITTEST SCROLL_trackHitTest;
102 static BOOL SCROLL_trackVertical;
103
104 /* Is the moving thumb being displayed? */
105 static BOOL SCROLL_MovingThumb = FALSE;
106
107 /* Local functions */
108 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
109 BOOL fShowH, BOOL fShowV );
110 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
111 const SCROLLINFO *info, BOOL bRedraw );
112 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
113 RECT *rect, INT arrowSize,
114 INT thumbSize, INT thumbPos,
115 UINT flags, BOOL vertical,
116 BOOL top_selected, BOOL bottom_selected );
117
118
119 /*********************************************************************
120 * scrollbar class descriptor
121 */
122 static const WCHAR scrollbarW[] = {'S','c','r','o','l','l','B','a','r',0};
123 const struct builtin_class_descr SCROLL_builtin_class =
124 {
125 scrollbarW, /* name */
126 CS_DBLCLKS | CS_VREDRAW | CS_HREDRAW | CS_PARENTDC, /* style */
127 WINPROC_SCROLLBAR, /* proc */
128 sizeof(SCROLLBAR_INFO), /* extra */
129 IDC_ARROW, /* cursor */
130 0 /* brush */
131 };
132
133 /***********************************************************************
134 * SCROLL_ScrollInfoValid
135 *
136 * Determine if the supplied SCROLLINFO struct is valid.
137 * info [in] The SCROLLINFO struct to be tested
138 */
139 static inline BOOL SCROLL_ScrollInfoValid( LPCSCROLLINFO info )
140 {
141 return !(info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)
142 || (info->cbSize != sizeof(*info)
143 && info->cbSize != sizeof(*info) - sizeof(info->nTrackPos)));
144 }
145
146
147 /***********************************************************************
148 * SCROLL_GetInternalInfo
149
150 * Returns pointer to internal SCROLLBAR_INFO structure for nBar
151 * or NULL if failed (f.i. scroll bar does not exist yet)
152 * If alloc is TRUE and the struct does not exist yet, create it.
153 */
154 static SCROLLBAR_INFO *SCROLL_GetInternalInfo( HWND hwnd, INT nBar, BOOL alloc )
155 {
156 SCROLLBAR_INFO *infoPtr = NULL;
157 WND *wndPtr = WIN_GetPtr( hwnd );
158
159 if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return NULL;
160 switch(nBar)
161 {
162 case SB_HORZ:
163 if (wndPtr->pScroll) infoPtr = &((LPWINSCROLLBAR_INFO)wndPtr->pScroll)->horz;
164 break;
165 case SB_VERT:
166 if (wndPtr->pScroll) infoPtr = &((LPWINSCROLLBAR_INFO)wndPtr->pScroll)->vert;
167 break;
168 case SB_CTL:
169 infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra;
170 break;
171 case SB_BOTH:
172 WARN("with SB_BOTH\n");
173 break;
174 }
175
176 if (!infoPtr && alloc)
177 {
178 WINSCROLLBAR_INFO *winInfoPtr;
179
180 if (nBar != SB_HORZ && nBar != SB_VERT)
181 WARN("Cannot initialize nBar=%d\n",nBar);
182 else if ((winInfoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(WINSCROLLBAR_INFO) )))
183 {
184 /* Set default values */
185 winInfoPtr->horz.minVal = 0;
186 winInfoPtr->horz.curVal = 0;
187 winInfoPtr->horz.page = 0;
188 /* From MSDN and our own tests:
189 * max for a standard scroll bar is 100 by default. */
190 winInfoPtr->horz.maxVal = 100;
191 winInfoPtr->horz.flags = ESB_ENABLE_BOTH;
192 winInfoPtr->vert = winInfoPtr->horz;
193 wndPtr->pScroll = winInfoPtr;
194 infoPtr = nBar == SB_HORZ ? &winInfoPtr->horz : &winInfoPtr->vert;
195 }
196 }
197 WIN_ReleasePtr( wndPtr );
198 return infoPtr;
199 }
200
201
202 /***********************************************************************
203 * SCROLL_GetScrollBarRect
204 *
205 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
206 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
207 * 'arrowSize' returns the width or height of an arrow (depending on
208 * the orientation of the scrollbar), 'thumbSize' returns the size of
209 * the thumb, and 'thumbPos' returns the position of the thumb
210 * relative to the left or to the top.
211 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
212 */
213 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
214 INT *arrowSize, INT *thumbSize,
215 INT *thumbPos )
216 {
217 INT pixels;
218 BOOL vertical;
219 WND *wndPtr = WIN_GetPtr( hwnd );
220
221 if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return FALSE;
222
223 switch(nBar)
224 {
225 case SB_HORZ:
226 WIN_GetRectangles( hwnd, COORDS_WINDOW, NULL, lprect );
227 lprect->top = lprect->bottom;
228 lprect->bottom += GetSystemMetrics(SM_CYHSCROLL);
229 if(wndPtr->dwStyle & WS_VSCROLL)
230 lprect->right++;
231 vertical = FALSE;
232 break;
233
234 case SB_VERT:
235 WIN_GetRectangles( hwnd, COORDS_WINDOW, NULL, lprect );
236 if((wndPtr->dwExStyle & WS_EX_LEFTSCROLLBAR) != 0)
237 {
238 lprect->right = lprect->left;
239 lprect->left -= GetSystemMetrics(SM_CXVSCROLL);
240 }
241 else
242 {
243 lprect->left = lprect->right;
244 lprect->right += GetSystemMetrics(SM_CXVSCROLL);
245 }
246 if(wndPtr->dwStyle & WS_HSCROLL)
247 lprect->bottom++;
248 vertical = TRUE;
249 break;
250
251 case SB_CTL:
252 GetClientRect( hwnd, lprect );
253 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
254 break;
255
256 default:
257 WIN_ReleasePtr( wndPtr );
258 return FALSE;
259 }
260
261 if (vertical) pixels = lprect->bottom - lprect->top;
262 else pixels = lprect->right - lprect->left;
263
264 if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
265 {
266 if (pixels > SCROLL_MIN_RECT)
267 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
268 else
269 *arrowSize = 0;
270 *thumbPos = *thumbSize = 0;
271 }
272 else
273 {
274 SCROLLBAR_INFO *info = SCROLL_GetInternalInfo( hwnd, nBar, FALSE );
275 if (!info)
276 {
277 WARN("called for missing scroll bar\n");
278 WIN_ReleasePtr( wndPtr );
279 return FALSE;
280 }
281 *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
282 pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
283
284 if (info->page)
285 {
286 *thumbSize = MulDiv(pixels,info->page,(info->maxVal-info->minVal+1));
287 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
288 }
289 else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
290
291 if (((pixels -= *thumbSize ) < 0) ||
292 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
293 {
294 /* Rectangle too small or scrollbar disabled -> no thumb */
295 *thumbPos = *thumbSize = 0;
296 }
297 else
298 {
299 INT max = info->maxVal - max( info->page-1, 0 );
300 if (info->minVal >= max)
301 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
302 else
303 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
304 + MulDiv(pixels, (info->curVal-info->minVal),(max - info->minVal));
305 }
306 }
307 WIN_ReleasePtr( wndPtr );
308 return vertical;
309 }
310
311
312 /***********************************************************************
313 * SCROLL_GetThumbVal
314 *
315 * Compute the current scroll position based on the thumb position in pixels
316 * from the top of the scroll-bar.
317 */
318 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
319 BOOL vertical, INT pos )
320 {
321 INT thumbSize;
322 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
323 INT range;
324
325 if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
326 return infoPtr->minVal;
327
328 if (infoPtr->page)
329 {
330 thumbSize = MulDiv(pixels,infoPtr->page,(infoPtr->maxVal-infoPtr->minVal+1));
331 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
332 }
333 else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
334
335 if ((pixels -= thumbSize) <= 0) return infoPtr->minVal;
336
337 pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
338 if (pos > pixels) pos = pixels;
339
340 if (!infoPtr->page)
341 range = infoPtr->maxVal - infoPtr->minVal;
342 else
343 range = infoPtr->maxVal - infoPtr->minVal - infoPtr->page + 1;
344
345 return infoPtr->minVal + MulDiv(pos, range, pixels);
346 }
347
348 /***********************************************************************
349 * SCROLL_PtInRectEx
350 */
351 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
352 {
353 RECT rect = *lpRect;
354 int scrollbarWidth;
355
356 /* Pad hit rect to allow mouse to be dragged outside of scrollbar and
357 * still be considered in the scrollbar. */
358 if (vertical)
359 {
360 scrollbarWidth = lpRect->right - lpRect->left;
361 rect.left -= scrollbarWidth*8;
362 rect.right += scrollbarWidth*8;
363 rect.top -= scrollbarWidth*2;
364 rect.bottom += scrollbarWidth*2;
365 }
366 else
367 {
368 scrollbarWidth = lpRect->bottom - lpRect->top;
369 rect.left -= scrollbarWidth*2;
370 rect.right += scrollbarWidth*2;
371 rect.top -= scrollbarWidth*8;
372 rect.bottom += scrollbarWidth*8;
373 }
374 return PtInRect( &rect, pt );
375 }
376
377 /***********************************************************************
378 * SCROLL_ClipPos
379 */
380 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
381 {
382 if( pt.x < lpRect->left )
383 pt.x = lpRect->left;
384 else
385 if( pt.x > lpRect->right )
386 pt.x = lpRect->right;
387
388 if( pt.y < lpRect->top )
389 pt.y = lpRect->top;
390 else
391 if( pt.y > lpRect->bottom )
392 pt.y = lpRect->bottom;
393
394 return pt;
395 }
396
397
398 /***********************************************************************
399 * SCROLL_HitTest
400 *
401 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
402 */
403 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
404 POINT pt, BOOL bDragging )
405 {
406 INT arrowSize, thumbSize, thumbPos;
407 RECT rect;
408
409 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
410 &arrowSize, &thumbSize, &thumbPos );
411
412 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
413 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
414
415 if (vertical)
416 {
417 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
418 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
419 if (!thumbPos) return SCROLL_TOP_RECT;
420 pt.y -= rect.top;
421 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
422 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
423 }
424 else /* horizontal */
425 {
426 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
427 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
428 if (!thumbPos) return SCROLL_TOP_RECT;
429 pt.x -= rect.left;
430 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
431 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
432 }
433 return SCROLL_THUMB;
434 }
435
436
437 /***********************************************************************
438 * SCROLL_DrawArrows
439 *
440 * Draw the scroll bar arrows.
441 */
442 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
443 RECT *rect, INT arrowSize, BOOL vertical,
444 BOOL top_pressed, BOOL bottom_pressed )
445 {
446 RECT r;
447
448 r = *rect;
449 if( vertical )
450 r.bottom = r.top + arrowSize;
451 else
452 r.right = r.left + arrowSize;
453
454 DrawFrameControl( hdc, &r, DFC_SCROLL,
455 (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
456 | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
457 | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
458
459 r = *rect;
460 if( vertical )
461 r.top = r.bottom-arrowSize;
462 else
463 r.left = r.right-arrowSize;
464
465 DrawFrameControl( hdc, &r, DFC_SCROLL,
466 (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
467 | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
468 | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
469 }
470
471 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
472 INT arrowSize, INT thumbSize )
473 {
474 INT pos = SCROLL_TrackingPos;
475 INT max_size;
476
477 if( vertical )
478 max_size = rect->bottom - rect->top;
479 else
480 max_size = rect->right - rect->left;
481
482 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
483
484 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
485 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
486 else if( pos > max_size )
487 pos = max_size;
488
489 SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
490 rect, arrowSize, thumbSize, pos,
491 0, vertical, FALSE, FALSE );
492
493 SCROLL_MovingThumb = !SCROLL_MovingThumb;
494 }
495
496 /***********************************************************************
497 * SCROLL_DrawInterior
498 *
499 * Draw the scroll bar interior (everything except the arrows).
500 */
501 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
502 RECT *rect, INT arrowSize,
503 INT thumbSize, INT thumbPos,
504 UINT flags, BOOL vertical,
505 BOOL top_selected, BOOL bottom_selected )
506 {
507 RECT r;
508 HPEN hSavePen;
509 HBRUSH hSaveBrush,hBrush;
510
511 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
512 * The window-owned scrollbars need to call DEFWND_ControlColor
513 * to correctly setup default scrollbar colors
514 */
515 if (nBar == SB_CTL)
516 {
517 hBrush = (HBRUSH)SendMessageW( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
518 (WPARAM)hdc,(LPARAM)hwnd);
519 }
520 else
521 {
522 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
523 }
524
525 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
526 hSaveBrush = SelectObject( hdc, hBrush );
527
528 /* Calculate the scroll rectangle */
529 r = *rect;
530 if (vertical)
531 {
532 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
533 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
534 }
535 else
536 {
537 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
538 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
539 }
540
541 /* Draw the scroll rectangles and thumb */
542 if (!thumbPos) /* No thumb to draw */
543 {
544 PatBlt( hdc, r.left, r.top,
545 r.right - r.left, r.bottom - r.top,
546 PATCOPY );
547
548 /* cleanup and return */
549 SelectObject( hdc, hSavePen );
550 SelectObject( hdc, hSaveBrush );
551 return;
552 }
553
554 if (vertical)
555 {
556 PatBlt( hdc, r.left, r.top,
557 r.right - r.left,
558 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
559 top_selected ? 0x0f0000 : PATCOPY );
560 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
561 PatBlt( hdc, r.left, r.top + thumbSize,
562 r.right - r.left,
563 r.bottom - r.top - thumbSize,
564 bottom_selected ? 0x0f0000 : PATCOPY );
565 r.bottom = r.top + thumbSize;
566 }
567 else /* horizontal */
568 {
569 PatBlt( hdc, r.left, r.top,
570 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
571 r.bottom - r.top,
572 top_selected ? 0x0f0000 : PATCOPY );
573 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
574 PatBlt( hdc, r.left + thumbSize, r.top,
575 r.right - r.left - thumbSize,
576 r.bottom - r.top,
577 bottom_selected ? 0x0f0000 : PATCOPY );
578 r.right = r.left + thumbSize;
579 }
580
581 /* Draw the thumb */
582 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
583
584 /* cleanup */
585 SelectObject( hdc, hSavePen );
586 SelectObject( hdc, hSaveBrush );
587 }
588
589
590 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
591 RECT *rect, INT arrowSize,
592 INT thumbSize, INT thumbPos,
593 UINT flags, BOOL vertical,
594 BOOL top_selected, BOOL bottom_selected )
595 {
596 RECT r;
597 HPEN hSavePen;
598 HBRUSH hSaveBrush,hBrush;
599 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
600
601 if (Save_SCROLL_MovingThumb &&
602 (SCROLL_TrackingWin == hwnd) &&
603 (SCROLL_TrackingBar == nBar))
604 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
605
606 /* Select the correct brush and pen */
607
608 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
609 * The window-owned scrollbars need to call DEFWND_ControlColor
610 * to correctly setup default scrollbar colors
611 */
612 if (nBar == SB_CTL) {
613 hBrush = (HBRUSH)SendMessageW( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
614 (WPARAM)hdc,(LPARAM)hwnd);
615 } else {
616 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
617 }
618 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
619 hSaveBrush = SelectObject( hdc, hBrush );
620
621 /* Calculate the scroll rectangle */
622
623 r = *rect;
624 if (vertical)
625 {
626 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
627 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
628 }
629 else
630 {
631 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
632 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
633 }
634
635 /* Draw the scroll bar frame */
636
637 /* Draw the scroll rectangles and thumb */
638
639 if (!thumbPos) /* No thumb to draw */
640 {
641 PatBlt( hdc, r.left, r.top, r.right - r.left, r.bottom - r.top, PATCOPY );
642
643 /* cleanup and return */
644 SelectObject( hdc, hSavePen );
645 SelectObject( hdc, hSaveBrush );
646 return;
647 }
648
649 if (vertical)
650 {
651 PatBlt( hdc, r.left, r.top, r.right - r.left,
652 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
653 top_selected ? 0x0f0000 : PATCOPY );
654 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
655 PatBlt( hdc, r.left, r.top + thumbSize, r.right - r.left,
656 r.bottom - r.top - thumbSize,
657 bottom_selected ? 0x0f0000 : PATCOPY );
658 r.bottom = r.top + thumbSize;
659 }
660 else /* horizontal */
661 {
662 PatBlt( hdc, r.left, r.top,
663 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
664 r.bottom - r.top, top_selected ? 0x0f0000 : PATCOPY );
665 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
666 PatBlt( hdc, r.left + thumbSize, r.top, r.right - r.left - thumbSize,
667 r.bottom - r.top, bottom_selected ? 0x0f0000 : PATCOPY );
668 r.right = r.left + thumbSize;
669 }
670
671 /* Draw the thumb */
672
673 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
674 Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
675 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
676
677 if (Save_SCROLL_MovingThumb &&
678 (SCROLL_TrackingWin == hwnd) &&
679 (SCROLL_TrackingBar == nBar))
680 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
681
682 /* cleanup */
683 SelectObject( hdc, hSavePen );
684 SelectObject( hdc, hSaveBrush );
685 }
686
687
688 /***********************************************************************
689 * SCROLL_DrawScrollBar
690 *
691 * Redraw the whole scrollbar.
692 */
693 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
694 BOOL arrows, BOOL interior )
695 {
696 INT arrowSize, thumbSize, thumbPos;
697 RECT rect;
698 BOOL vertical;
699 SCROLLBAR_INFO *infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, TRUE );
700 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
701 DWORD style = GetWindowLongW( hwnd, GWL_STYLE );
702
703 if (!(hwnd = WIN_GetFullHandle( hwnd ))) return;
704
705 if (!infoPtr ||
706 ((nBar == SB_VERT) && !(style & WS_VSCROLL)) ||
707 ((nBar == SB_HORZ) && !(style & WS_HSCROLL))) return;
708 if (!WIN_IsWindowDrawable( hwnd, FALSE )) return;
709
710 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
711 &arrowSize, &thumbSize, &thumbPos );
712
713 /* do not draw if the scrollbar rectangle is empty */
714 if(IsRectEmpty(&rect)) return;
715
716 if (Save_SCROLL_MovingThumb &&
717 (SCROLL_TrackingWin == hwnd) &&
718 (SCROLL_TrackingBar == nBar))
719 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
720
721 /* Draw the arrows */
722
723 if (arrows && arrowSize)
724 {
725 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
726 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
727 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
728 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
729 else
730 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
731 FALSE, FALSE );
732 }
733 if( interior )
734 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
735 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
736
737 if (Save_SCROLL_MovingThumb &&
738 (SCROLL_TrackingWin == hwnd) &&
739 (SCROLL_TrackingBar == nBar))
740 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
741
742 /* if scroll bar has focus, reposition the caret */
743 if(hwnd==GetFocus() && (nBar==SB_CTL))
744 {
745 if (!vertical)
746 {
747 SetCaretPos(thumbPos+1, rect.top+1);
748 }
749 else
750 {
751 SetCaretPos(rect.top+1, thumbPos+1);
752 }
753 }
754 }
755
756 /***********************************************************************
757 * SCROLL_DrawSizeGrip
758 *
759 * Draw the size grip.
760 */
761 static void SCROLL_DrawSizeGrip( HWND hwnd, HDC hdc)
762 {
763 RECT rc;
764
765 GetClientRect( hwnd, &rc );
766 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
767 rc.left = max( rc.left, rc.right - GetSystemMetrics(SM_CXVSCROLL) - 1 );
768 rc.top = max( rc.top, rc.bottom - GetSystemMetrics(SM_CYHSCROLL) - 1 );
769 DrawFrameControl( hdc, &rc, DFC_SCROLL, DFCS_SCROLLSIZEGRIP );
770 }
771
772
773 /***********************************************************************
774 * SCROLL_RefreshScrollBar
775 *
776 * Repaint the scroll bar interior after a SetScrollRange() or
777 * SetScrollPos() call.
778 */
779 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
780 BOOL arrows, BOOL interior )
781 {
782 HDC hdc = GetDCEx( hwnd, 0,
783 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
784 if (!hdc) return;
785
786 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
787 ReleaseDC( hwnd, hdc );
788 }
789
790
791 /***********************************************************************
792 * SCROLL_HandleKbdEvent
793 *
794 * Handle a keyboard event (only for SB_CTL scrollbars with focus).
795 *
796 * PARAMS
797 * hwnd [I] Handle of window with scrollbar(s)
798 * wParam [I] Variable input including enable state
799 * lParam [I] Variable input including input point
800 */
801 static void SCROLL_HandleKbdEvent(HWND hwnd, WPARAM wParam, LPARAM lParam)
802 {
803 TRACE("hwnd=%p wParam=%ld lParam=%ld\n", hwnd, wParam, lParam);
804
805 /* hide caret on first KEYDOWN to prevent flicker */
806 if ((lParam & PFD_DOUBLEBUFFER_DONTCARE) == 0)
807 HideCaret(hwnd);
808
809 switch(wParam)
810 {
811 case VK_PRIOR: wParam = SB_PAGEUP; break;
812 case VK_NEXT: wParam = SB_PAGEDOWN; break;
813 case VK_HOME: wParam = SB_TOP; break;
814 case VK_END: wParam = SB_BOTTOM; break;
815 case VK_UP: wParam = SB_LINEUP; break;
816 case VK_DOWN: wParam = SB_LINEDOWN; break;
817 case VK_LEFT: wParam = SB_LINEUP; break;
818 case VK_RIGHT: wParam = SB_LINEDOWN; break;
819 default: return;
820 }
821 SendMessageW(GetParent(hwnd),
822 ((GetWindowLongW( hwnd, GWL_STYLE ) & SBS_VERT) ?
823 WM_VSCROLL : WM_HSCROLL), wParam, (LPARAM)hwnd);
824 }
825
826
827 /***********************************************************************
828 * SCROLL_HandleScrollEvent
829 *
830 * Handle a mouse or timer event for the scrollbar.
831 * 'pt' is the location of the mouse event in client (for SB_CTL) or
832 * windows coordinates.
833 */
834 static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
835 {
836 /* Previous mouse position for timer events */
837 static POINT prevPt;
838 /* Thumb position when tracking started. */
839 static UINT trackThumbPos;
840 /* Position in the scroll-bar of the last button-down event. */
841 static INT lastClickPos;
842 /* Position in the scroll-bar of the last mouse event. */
843 static INT lastMousePos;
844
845 enum SCROLL_HITTEST hittest;
846 HWND hwndOwner, hwndCtl;
847 BOOL vertical;
848 INT arrowSize, thumbSize, thumbPos;
849 RECT rect;
850 HDC hdc;
851
852 SCROLLBAR_INFO *infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, FALSE );
853 if (!infoPtr) return;
854 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
855 return;
856
857 if (nBar == SB_CTL && (GetWindowLongW( hwnd, GWL_STYLE ) & (SBS_SIZEGRIP | SBS_SIZEBOX)))
858 {
859 switch(msg)
860 {
861 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
862 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
863 SetCapture( hwnd );
864 prevPt = pt;
865 SCROLL_trackHitTest = hittest = SCROLL_THUMB;
866 break;
867 case WM_MOUSEMOVE:
868 GetClientRect(GetParent(GetParent(hwnd)),&rect);
869 prevPt = pt;
870 break;
871 case WM_LBUTTONUP:
872 ReleaseCapture();
873 SCROLL_trackHitTest = hittest = SCROLL_NOWHERE;
874 if (hwnd==GetFocus()) ShowCaret(hwnd);
875 break;
876 case WM_SYSTIMER:
877 pt = prevPt;
878 break;
879 }
880 return;
881 }
882
883 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
884 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
885 &arrowSize, &thumbSize, &thumbPos );
886 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
887 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
888
889 switch(msg)
890 {
891 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
892 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
893 SCROLL_trackVertical = vertical;
894 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
895 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
896 lastMousePos = lastClickPos;
897 trackThumbPos = thumbPos;
898 prevPt = pt;
899 if (nBar == SB_CTL && (GetWindowLongW(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
900 SetCapture( hwnd );
901 break;
902
903 case WM_MOUSEMOVE:
904 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
905 prevPt = pt;
906 break;
907
908 case WM_LBUTTONUP:
909 hittest = SCROLL_NOWHERE;
910 ReleaseCapture();
911 /* if scrollbar has focus, show back caret */
912 if (hwnd==GetFocus()) ShowCaret(hwnd);
913 break;
914
915 case WM_SYSTIMER:
916 pt = prevPt;
917 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
918 break;
919
920 default:
921 return; /* Should never happen */
922 }
923
924 TRACE("Event: hwnd=%p bar=%d msg=%s pt=%d,%d hit=%d\n",
925 hwnd, nBar, SPY_GetMsgName(msg,hwnd), pt.x, pt.y, hittest );
926
927 switch(SCROLL_trackHitTest)
928 {
929 case SCROLL_NOWHERE: /* No tracking in progress */
930 break;
931
932 case SCROLL_TOP_ARROW:
933 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
934 (hittest == SCROLL_trackHitTest), FALSE );
935 if (hittest == SCROLL_trackHitTest)
936 {
937 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
938 {
939 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
940 SB_LINEUP, (LPARAM)hwndCtl );
941 }
942
943 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
944 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, NULL );
945 }
946 else KillSystemTimer( hwnd, SCROLL_TIMER );
947 break;
948
949 case SCROLL_TOP_RECT:
950 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
951 thumbPos, infoPtr->flags, vertical,
952 (hittest == SCROLL_trackHitTest), FALSE );
953 if (hittest == SCROLL_trackHitTest)
954 {
955 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
956 {
957 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
958 SB_PAGEUP, (LPARAM)hwndCtl );
959 }
960 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
961 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, NULL );
962 }
963 else KillSystemTimer( hwnd, SCROLL_TIMER );
964 break;
965
966 case SCROLL_THUMB:
967 if (msg == WM_LBUTTONDOWN)
968 {
969 SCROLL_TrackingWin = hwnd;
970 SCROLL_TrackingBar = nBar;
971 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
972 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
973 vertical,
974 SCROLL_TrackingPos );
975 if (!SCROLL_MovingThumb)
976 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
977 }
978 else if (msg == WM_LBUTTONUP)
979 {
980 if (SCROLL_MovingThumb)
981 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
982
983 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
984 thumbPos, infoPtr->flags, vertical,
985 FALSE, FALSE );
986 }
987 else /* WM_MOUSEMOVE */
988 {
989 INT pos;
990
991 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
992 else
993 {
994 pt = SCROLL_ClipPos( &rect, pt );
995 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
996 }
997 if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
998 {
999 if (SCROLL_MovingThumb)
1000 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1001 arrowSize, thumbSize );
1002 lastMousePos = pos;
1003 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
1004 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1005 vertical,
1006 SCROLL_TrackingPos );
1007 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1008 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1009 (LPARAM)hwndCtl );
1010 if (!SCROLL_MovingThumb)
1011 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1012 arrowSize, thumbSize );
1013 }
1014 }
1015 break;
1016
1017 case SCROLL_BOTTOM_RECT:
1018 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1019 thumbPos, infoPtr->flags, vertical,
1020 FALSE, (hittest == SCROLL_trackHitTest) );
1021 if (hittest == SCROLL_trackHitTest)
1022 {
1023 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1024 {
1025 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1026 SB_PAGEDOWN, (LPARAM)hwndCtl );
1027 }
1028 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1029 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, NULL );
1030 }
1031 else KillSystemTimer( hwnd, SCROLL_TIMER );
1032 break;
1033
1034 case SCROLL_BOTTOM_ARROW:
1035 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1036 FALSE, (hittest == SCROLL_trackHitTest) );
1037 if (hittest == SCROLL_trackHitTest)
1038 {
1039 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1040 {
1041 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1042 SB_LINEDOWN, (LPARAM)hwndCtl );
1043 }
1044
1045 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1046 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, NULL );
1047 }
1048 else KillSystemTimer( hwnd, SCROLL_TIMER );
1049 break;
1050 }
1051
1052 if (msg == WM_LBUTTONDOWN)
1053 {
1054
1055 if (hittest == SCROLL_THUMB)
1056 {
1057 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1058 trackThumbPos + lastMousePos - lastClickPos );
1059 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1060 MAKEWPARAM( SB_THUMBTRACK, val ), (LPARAM)hwndCtl );
1061 }
1062 }
1063
1064 if (msg == WM_LBUTTONUP)
1065 {
1066 hittest = SCROLL_trackHitTest;
1067 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1068
1069 if (hittest == SCROLL_THUMB)
1070 {
1071 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1072 trackThumbPos + lastMousePos - lastClickPos );
1073 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1074 MAKEWPARAM( SB_THUMBPOSITION, val ), (LPARAM)hwndCtl );
1075 }
1076 /* SB_ENDSCROLL doesn't report thumb position */
1077 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1078 SB_ENDSCROLL, (LPARAM)hwndCtl );
1079
1080 /* Terminate tracking */
1081 SCROLL_TrackingWin = 0;
1082 }
1083
1084 ReleaseDC( hwnd, hdc );
1085 }
1086
1087
1088 /***********************************************************************
1089 * SCROLL_TrackScrollBar
1090 *
1091 * Track a mouse button press on a scroll-bar.
1092 * pt is in screen-coordinates for non-client scroll bars.
1093 */
1094 void SCROLL_TrackScrollBar( HWND hwnd, INT scrollbar, POINT pt )
1095 {
1096 MSG msg;
1097 INT xoffset = 0, yoffset = 0;
1098
1099 if (scrollbar != SB_CTL)
1100 {
1101 RECT rect;
1102 WIN_GetRectangles( hwnd, COORDS_CLIENT, &rect, NULL );
1103 ScreenToClient( hwnd, &pt );
1104 pt.x -= rect.left;
1105 pt.y -= rect.top;
1106 }
1107
1108 SCROLL_HandleScrollEvent( hwnd, scrollbar, WM_LBUTTONDOWN, pt );
1109
1110 do
1111 {
1112 if (!GetMessageW( &msg, 0, 0, 0 )) break;
1113 if (CallMsgFilterW( &msg, MSGF_SCROLLBAR )) continue;
1114 if (msg.message == WM_LBUTTONUP ||
1115 msg.message == WM_MOUSEMOVE ||
1116 (msg.message == WM_SYSTIMER && msg.wParam == SCROLL_TIMER))
1117 {
1118 pt.x = (short)LOWORD(msg.lParam) + xoffset;
1119 pt.y = (short)HIWORD(msg.lParam) + yoffset;
1120 SCROLL_HandleScrollEvent( hwnd, scrollbar, msg.message, pt );
1121 }
1122 else
1123 {
1124 TranslateMessage( &msg );
1125 DispatchMessageW( &msg );
1126 }
1127 if (!IsWindow( hwnd ))
1128 {
1129 ReleaseCapture();
1130 break;
1131 }
1132 } while (msg.message != WM_LBUTTONUP && GetCapture() == hwnd);
1133 }
1134
1135
1136 /***********************************************************************
1137 * SCROLL_CreateScrollBar
1138 *
1139 * Create a scroll bar
1140 *
1141 * PARAMS
1142 * hwnd [I] Handle of window with scrollbar(s)
1143 * lpCreate [I] The style and place of the scroll bar
1144 */
1145 static void SCROLL_CreateScrollBar(HWND hwnd, LPCREATESTRUCTW lpCreate)
1146 {
1147 LPSCROLLBAR_INFO info = SCROLL_GetInternalInfo(hwnd, SB_CTL, TRUE);
1148 if (!info) return;
1149
1150 TRACE("hwnd=%p lpCreate=%p\n", hwnd, lpCreate);
1151
1152 if (lpCreate->style & WS_DISABLED)
1153 {
1154 info->flags = ESB_DISABLE_BOTH;
1155 TRACE("Created WS_DISABLED scrollbar\n");
1156 }
1157
1158
1159 if (lpCreate->style & (SBS_SIZEGRIP | SBS_SIZEBOX))
1160 {
1161 if (lpCreate->style & SBS_SIZEBOXTOPLEFTALIGN)
1162 MoveWindow( hwnd, lpCreate->x, lpCreate->y, GetSystemMetrics(SM_CXVSCROLL)+1,
1163 GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1164 else if(lpCreate->style & SBS_SIZEBOXBOTTOMRIGHTALIGN)
1165 MoveWindow( hwnd, lpCreate->x+lpCreate->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1166 lpCreate->y+lpCreate->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1167 GetSystemMetrics(SM_CXVSCROLL)+1,
1168 GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1169 }
1170 else if (lpCreate->style & SBS_VERT)
1171 {
1172 if (lpCreate->style & SBS_LEFTALIGN)
1173 MoveWindow( hwnd, lpCreate->x, lpCreate->y,
1174 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreate->cy, FALSE );
1175 else if (lpCreate->style & SBS_RIGHTALIGN)
1176 MoveWindow( hwnd,
1177 lpCreate->x+lpCreate->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1178 lpCreate->y,
1179 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreate->cy, FALSE );
1180 }
1181 else /* SBS_HORZ */
1182 {
1183 if (lpCreate->style & SBS_TOPALIGN)
1184 MoveWindow( hwnd, lpCreate->x, lpCreate->y,
1185 lpCreate->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1186 else if (lpCreate->style & SBS_BOTTOMALIGN)
1187 MoveWindow( hwnd,
1188 lpCreate->x,
1189 lpCreate->y+lpCreate->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1190 lpCreate->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1191 }
1192 }
1193
1194
1195 /*************************************************************************
1196 * SCROLL_GetScrollInfo
1197 *
1198 * Internal helper for the API function
1199 *
1200 * PARAMS
1201 * hwnd [I] Handle of window with scrollbar(s)
1202 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1203 * info [IO] fMask specifies which values to retrieve
1204 *
1205 * RETURNS
1206 * FALSE if requested field not filled (f.i. scroll bar does not exist)
1207 */
1208 static BOOL SCROLL_GetScrollInfo(HWND hwnd, INT nBar, LPSCROLLINFO info)
1209 {
1210 LPSCROLLBAR_INFO infoPtr;
1211
1212 /* handle invalid data structure */
1213 if (!SCROLL_ScrollInfoValid(info)
1214 || !(infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE)))
1215 return FALSE;
1216
1217 /* fill in the desired scroll info structure */
1218 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->page;
1219 if (info->fMask & SIF_POS) info->nPos = infoPtr->curVal;
1220 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1221 info->nTrackPos = (SCROLL_TrackingWin == WIN_GetFullHandle(hwnd)) ? SCROLL_TrackingVal : infoPtr->curVal;
1222 if (info->fMask & SIF_RANGE)
1223 {
1224 info->nMin = infoPtr->minVal;
1225 info->nMax = infoPtr->maxVal;
1226 }
1227
1228 TRACE("cbSize %02x fMask %04x nMin %d nMax %d nPage %u nPos %d nTrackPos %d\n",
1229 info->cbSize, info->fMask, info->nMin, info->nMax, info->nPage,
1230 info->nPos, info->nTrackPos);
1231
1232 return (info->fMask & SIF_ALL) != 0;
1233 }
1234
1235
1236 /*************************************************************************
1237 * SCROLL_GetScrollBarInfo
1238 *
1239 * Internal helper for the API function
1240 *
1241 * PARAMS
1242 * hwnd [I] Handle of window with scrollbar(s)
1243 * idObject [I] One of OBJID_CLIENT, OBJID_HSCROLL, or OBJID_VSCROLL
1244 * info [IO] cbSize specifies the size of the structure
1245 *
1246 * RETURNS
1247 * FALSE if failed
1248 */
1249 static BOOL SCROLL_GetScrollBarInfo(HWND hwnd, LONG idObject, LPSCROLLBARINFO info)
1250 {
1251 LPSCROLLBAR_INFO infoPtr;
1252 INT nBar;
1253 INT nDummy;
1254 DWORD style = GetWindowLongW(hwnd, GWL_STYLE);
1255 BOOL pressed;
1256 RECT rect;
1257
1258 switch (idObject)
1259 {
1260 case OBJID_CLIENT: nBar = SB_CTL; break;
1261 case OBJID_HSCROLL: nBar = SB_HORZ; break;
1262 case OBJID_VSCROLL: nBar = SB_VERT; break;
1263 default: return FALSE;
1264 }
1265
1266 /* handle invalid data structure */
1267 if (info->cbSize != sizeof(*info))
1268 return FALSE;
1269
1270 SCROLL_GetScrollBarRect(hwnd, nBar, &info->rcScrollBar, &nDummy,
1271 &info->dxyLineButton, &info->xyThumbTop);
1272 /* rcScrollBar needs to be in screen coordinates */
1273 GetWindowRect(hwnd, &rect);
1274 OffsetRect(&info->rcScrollBar, rect.left, rect.top);
1275
1276 info->xyThumbBottom = info->xyThumbTop + info->dxyLineButton;
1277
1278 infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, TRUE);
1279 if (!infoPtr)
1280 return FALSE;
1281
1282 /* Scroll bar state */
1283 info->rgstate[0] = 0;
1284 if ((nBar == SB_HORZ && !(style & WS_HSCROLL))
1285 || (nBar == SB_VERT && !(style & WS_VSCROLL)))
1286 info->rgstate[0] |= STATE_SYSTEM_INVISIBLE;
1287 if (infoPtr->minVal >= infoPtr->maxVal - max(infoPtr->page - 1, 0))
1288 {
1289 if (!(info->rgstate[0] & STATE_SYSTEM_INVISIBLE))
1290 info->rgstate[0] |= STATE_SYSTEM_UNAVAILABLE;
1291 else
1292 info->rgstate[0] |= STATE_SYSTEM_OFFSCREEN;
1293 }
1294 if (nBar == SB_CTL && !IsWindowEnabled(hwnd))
1295 info->rgstate[0] |= STATE_SYSTEM_UNAVAILABLE;
1296
1297 pressed = ((nBar == SB_VERT) == SCROLL_trackVertical && GetCapture() == hwnd);
1298
1299 /* Top/left arrow button state. MSDN says top/right, but I don't believe it */
1300 info->rgstate[1] = 0;
1301 if (pressed && SCROLL_trackHitTest == SCROLL_TOP_ARROW)
1302 info->rgstate[1] |= STATE_SYSTEM_PRESSED;
1303 if (infoPtr->flags & ESB_DISABLE_LTUP)
1304 info->rgstate[1] |= STATE_SYSTEM_UNAVAILABLE;
1305
1306 /* Page up/left region state. MSDN says up/right, but I don't believe it */
1307 info->rgstate[2] = 0;
1308 if (infoPtr->curVal == infoPtr->minVal)
1309 info->rgstate[2] |= STATE_SYSTEM_INVISIBLE;
1310 if (pressed && SCROLL_trackHitTest == SCROLL_TOP_RECT)
1311 info->rgstate[2] |= STATE_SYSTEM_PRESSED;
1312
1313 /* Thumb state */
1314 info->rgstate[3] = 0;
1315 if (pressed && SCROLL_trackHitTest == SCROLL_THUMB)
1316 info->rgstate[3] |= STATE_SYSTEM_PRESSED;
1317
1318 /* Page down/right region state. MSDN says down/left, but I don't believe it */
1319 info->rgstate[4] = 0;
1320 if (infoPtr->curVal >= infoPtr->maxVal - 1)
1321 info->rgstate[4] |= STATE_SYSTEM_INVISIBLE;
1322 if (pressed && SCROLL_trackHitTest == SCROLL_BOTTOM_RECT)
1323 info->rgstate[4] |= STATE_SYSTEM_PRESSED;
1324
1325 /* Bottom/right arrow button state. MSDN says bottom/left, but I don't believe it */
1326 info->rgstate[5] = 0;
1327 if (pressed && SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW)
1328 info->rgstate[5] |= STATE_SYSTEM_PRESSED;
1329 if (infoPtr->flags & ESB_DISABLE_RTDN)
1330 info->rgstate[5] |= STATE_SYSTEM_UNAVAILABLE;
1331
1332 return TRUE;
1333 }
1334
1335
1336 /*************************************************************************
1337 * SCROLL_GetScrollPos
1338 *
1339 * Internal helper for the API function
1340 *
1341 * PARAMS
1342 * hwnd [I] Handle of window with scrollbar(s)
1343 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1344 */
1345 static INT SCROLL_GetScrollPos(HWND hwnd, INT nBar)
1346 {
1347 LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
1348 return infoPtr ? infoPtr->curVal: 0;
1349 }
1350
1351
1352 /*************************************************************************
1353 * SCROLL_GetScrollRange
1354 *
1355 * Internal helper for the API function
1356 *
1357 * PARAMS
1358 * hwnd [I] Handle of window with scrollbar(s)
1359 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1360 * lpMin [O] Where to store minimum value
1361 * lpMax [O] Where to store maximum value
1362 *
1363 * RETURNS
1364 * Success: TRUE
1365 * Failure: FALSE
1366 */
1367 static BOOL SCROLL_GetScrollRange(HWND hwnd, INT nBar, LPINT lpMin, LPINT lpMax)
1368 {
1369 LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
1370
1371 if (lpMin) *lpMin = infoPtr ? infoPtr->minVal : 0;
1372 if (lpMax) *lpMax = infoPtr ? infoPtr->maxVal : 0;
1373
1374 return TRUE;
1375 }
1376
1377
1378 /*************************************************************************
1379 * SCROLL_SetScrollRange
1380 *
1381 * PARAMS
1382 * hwnd [I] Handle of window with scrollbar(s)
1383 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1384 * lpMin [I] Minimum value
1385 * lpMax [I] Maximum value
1386 *
1387 */
1388 static BOOL SCROLL_SetScrollRange(HWND hwnd, INT nBar, INT minVal, INT maxVal)
1389 {
1390 LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
1391
1392 TRACE("hwnd=%p nBar=%d min=%d max=%d\n", hwnd, nBar, minVal, maxVal);
1393
1394 if (infoPtr)
1395 {
1396 infoPtr->minVal = minVal;
1397 infoPtr->maxVal = maxVal;
1398 }
1399 return TRUE;
1400 }
1401
1402
1403 /***********************************************************************
1404 * ScrollBarWndProc_common
1405 */
1406 LRESULT ScrollBarWndProc_common( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam, BOOL unicode )
1407 {
1408 if (!IsWindow( hwnd )) return 0;
1409
1410 switch(message)
1411 {
1412 case WM_CREATE:
1413 SCROLL_CreateScrollBar(hwnd, (LPCREATESTRUCTW)lParam);
1414 break;
1415
1416 case WM_ENABLE:
1417 {
1418 SCROLLBAR_INFO *infoPtr;
1419 if ((infoPtr = SCROLL_GetInternalInfo( hwnd, SB_CTL, FALSE )))
1420 {
1421 infoPtr->flags = wParam ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH;
1422 SCROLL_RefreshScrollBar(hwnd, SB_CTL, TRUE, TRUE);
1423 }
1424 }
1425 return 0;
1426
1427 case WM_LBUTTONDBLCLK:
1428 case WM_LBUTTONDOWN:
1429 if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEGRIP)
1430 {
1431 SendMessageW( GetParent(hwnd), WM_SYSCOMMAND,
1432 SC_SIZE + ((GetWindowLongW( hwnd, GWL_EXSTYLE ) & WS_EX_LAYOUTRTL) ?
1433 WMSZ_BOTTOMLEFT : WMSZ_BOTTOMRIGHT), lParam );
1434 }
1435 else
1436 {
1437 POINT pt;
1438 pt.x = (short)LOWORD(lParam);
1439 pt.y = (short)HIWORD(lParam);
1440 SCROLL_TrackScrollBar( hwnd, SB_CTL, pt );
1441 }
1442 break;
1443 case WM_LBUTTONUP:
1444 case WM_MOUSEMOVE:
1445 case WM_SYSTIMER:
1446 {
1447 POINT pt;
1448 pt.x = (short)LOWORD(lParam);
1449 pt.y = (short)HIWORD(lParam);
1450 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1451 }
1452 break;
1453
1454 case WM_KEYDOWN:
1455 SCROLL_HandleKbdEvent(hwnd, wParam, lParam);
1456 break;
1457
1458 case WM_KEYUP:
1459 ShowCaret(hwnd);
1460 break;
1461
1462 case WM_SETFOCUS:
1463 {
1464 /* Create a caret when a ScrollBar get focus */
1465 RECT rect;
1466 int arrowSize, thumbSize, thumbPos, vertical;
1467 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1468 &arrowSize, &thumbSize, &thumbPos );
1469 if (!vertical)
1470 {
1471 CreateCaret(hwnd, (HBITMAP)1, thumbSize-2, rect.bottom-rect.top-2);
1472 SetCaretPos(thumbPos+1, rect.top+1);
1473 }
1474 else
1475 {
1476 CreateCaret(hwnd, (HBITMAP)1, rect.right-rect.left-2,thumbSize-2);
1477 SetCaretPos(rect.top+1, thumbPos+1);
1478 }
1479 ShowCaret(hwnd);
1480 }
1481 break;
1482
1483 case WM_KILLFOCUS:
1484 {
1485 RECT rect;
1486 int arrowSize, thumbSize, thumbPos, vertical;
1487 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1488 if (!vertical){
1489 rect.left=thumbPos+1;
1490 rect.right=rect.left+thumbSize;
1491 }
1492 else
1493 {
1494 rect.top=thumbPos+1;
1495 rect.bottom=rect.top+thumbSize;
1496 }
1497 HideCaret(hwnd);
1498 InvalidateRect(hwnd,&rect,0);
1499 DestroyCaret();
1500 }
1501 break;
1502
1503 case WM_ERASEBKGND:
1504 return 1;
1505
1506 case WM_GETDLGCODE:
1507 return DLGC_WANTARROWS; /* Windows returns this value */
1508
1509 case WM_PAINT:
1510 {
1511 PAINTSTRUCT ps;
1512 HDC hdc = wParam ? (HDC)wParam : BeginPaint(hwnd, &ps);
1513 if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEGRIP)
1514 {
1515 SCROLL_DrawSizeGrip( hwnd, hdc);
1516 }
1517 else if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEBOX)
1518 {
1519 RECT rc;
1520 GetClientRect( hwnd, &rc );
1521 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
1522 }
1523 else
1524 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1525 if (!wParam) EndPaint(hwnd, &ps);
1526 }
1527 break;
1528
1529 case WM_SETCURSOR:
1530 if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEGRIP)
1531 {
1532 ULONG_PTR cursor = (GetWindowLongW( hwnd, GWL_EXSTYLE ) & WS_EX_LAYOUTRTL) ? IDC_SIZENESW : IDC_SIZENWSE;
1533 return (LRESULT)SetCursor( LoadCursorA( 0, (LPSTR)cursor ));
1534 }
1535 return DefWindowProcW( hwnd, message, wParam, lParam );
1536
1537 case SBM_SETPOS:
1538 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1539
1540 case SBM_GETPOS:
1541 return SCROLL_GetScrollPos(hwnd, SB_CTL);
1542
1543 case SBM_SETRANGEREDRAW:
1544 case SBM_SETRANGE:
1545 {
1546 INT oldPos = SCROLL_GetScrollPos( hwnd, SB_CTL );
1547 SCROLL_SetScrollRange( hwnd, SB_CTL, wParam, lParam );
1548 if (message == SBM_SETRANGEREDRAW)
1549 SCROLL_RefreshScrollBar( hwnd, SB_CTL, TRUE, TRUE );
1550 if (oldPos != SCROLL_GetScrollPos( hwnd, SB_CTL )) return oldPos;
1551 }
1552 return 0;
1553
1554 case SBM_GETRANGE:
1555 return SCROLL_GetScrollRange(hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam);
1556
1557 case SBM_ENABLE_ARROWS:
1558 return EnableScrollBar( hwnd, SB_CTL, wParam );
1559
1560 case SBM_SETSCROLLINFO:
1561 return SCROLL_SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1562
1563 case SBM_GETSCROLLINFO:
1564 return SCROLL_GetScrollInfo(hwnd, SB_CTL, (SCROLLINFO *)lParam);
1565
1566 case SBM_GETSCROLLBARINFO:
1567 return SCROLL_GetScrollBarInfo(hwnd, OBJID_CLIENT, (SCROLLBARINFO *)lParam);
1568
1569 case 0x00e5:
1570 case 0x00e7:
1571 case 0x00e8:
1572 case 0x00ec:
1573 case 0x00ed:
1574 case 0x00ee:
1575 case 0x00ef:
1576 ERR("unknown Win32 msg %04x wp=%08lx lp=%08lx\n",
1577 message, wParam, lParam );
1578 break;
1579
1580 default:
1581 if (message >= WM_USER)
1582 WARN("unknown msg %04x wp=%04lx lp=%08lx\n",
1583 message, wParam, lParam );
1584 if (unicode)
1585 return DefWindowProcW( hwnd, message, wParam, lParam );
1586 else
1587 return DefWindowProcA( hwnd, message, wParam, lParam );
1588 }
1589 return 0;
1590 }
1591
1592
1593 /*************************************************************************
1594 * SetScrollInfo (USER32.@)
1595 *
1596 * SetScrollInfo can be used to set the position, upper bound,
1597 * lower bound, and page size of a scrollbar control.
1598 *
1599 * PARAMS
1600 * hwnd [I] Handle of window with scrollbar(s)
1601 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1602 * info [I] Specifies what to change and new values
1603 * bRedraw [I] Should scrollbar be redrawn afterwards?
1604 *
1605 * RETURNS
1606 * Scrollbar position
1607 *
1608 * NOTE
1609 * For 100 lines of text to be displayed in a window of 25 lines,
1610 * one would for instance use info->nMin=0, info->nMax=75
1611 * (corresponding to the 76 different positions of the window on
1612 * the text), and info->nPage=25.
1613 */
1614 INT WINAPI SetScrollInfo(HWND hwnd, INT nBar, const SCROLLINFO *info, BOOL bRedraw)
1615 {
1616 TRACE("hwnd=%p nBar=%d info=%p, bRedraw=%d\n", hwnd, nBar, info, bRedraw);
1617
1618 /* Refer SB_CTL requests to the window */
1619 if (nBar == SB_CTL)
1620 return SendMessageW(hwnd, SBM_SETSCROLLINFO, bRedraw, (LPARAM)info);
1621 else
1622 return SCROLL_SetScrollInfo( hwnd, nBar, info, bRedraw );
1623 }
1624
1625 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar, LPCSCROLLINFO info, BOOL bRedraw )
1626 {
1627 /* Update the scrollbar state and set action flags according to
1628 * what has to be done graphics wise. */
1629
1630 SCROLLBAR_INFO *infoPtr;
1631 UINT new_flags;
1632 INT action = 0;
1633
1634 /* handle invalid data structure */
1635 if (!SCROLL_ScrollInfoValid(info)
1636 || !(infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, TRUE)))
1637 return 0;
1638
1639 if (TRACE_ON(scroll))
1640 {
1641 TRACE("hwnd=%p bar=%d", hwnd, nBar);
1642 if (info->fMask & SIF_PAGE) TRACE( " page=%d", info->nPage );
1643 if (info->fMask & SIF_POS) TRACE( " pos=%d", info->nPos );
1644 if (info->fMask & SIF_RANGE) TRACE( " min=%d max=%d", info->nMin, info->nMax );
1645 TRACE("\n");
1646 }
1647
1648 /* Set the page size */
1649
1650 if (info->fMask & SIF_PAGE)
1651 {
1652 if( infoPtr->page != info->nPage )
1653 {
1654 infoPtr->page = info->nPage;
1655 action |= SA_SSI_REFRESH;
1656 }
1657 }
1658
1659 /* Set the scroll pos */
1660
1661 if (info->fMask & SIF_POS)
1662 {
1663 if( infoPtr->curVal != info->nPos )
1664 {
1665 infoPtr->curVal = info->nPos;
1666 action |= SA_SSI_REFRESH;
1667 }
1668 }
1669
1670 /* Set the scroll range */
1671
1672 if (info->fMask & SIF_RANGE)
1673 {
1674 /* Invalid range -> range is set to (0,0) */
1675 if ((info->nMin > info->nMax) ||
1676 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1677 {
1678 action |= SA_SSI_REFRESH;
1679 infoPtr->minVal = 0;
1680 infoPtr->maxVal = 0;
1681 }
1682 else
1683 {
1684 if( infoPtr->minVal != info->nMin ||
1685 infoPtr->maxVal != info->nMax )
1686 {
1687 action |= SA_SSI_REFRESH;
1688 infoPtr->minVal = info->nMin;
1689 infoPtr->maxVal = info->nMax;
1690 }
1691 }
1692 }
1693
1694 /* Make sure the page size is valid */
1695 if (infoPtr->page < 0) infoPtr->page = 0;
1696 else if (infoPtr->page > infoPtr->maxVal - infoPtr->minVal + 1 )
1697 infoPtr->page = infoPtr->maxVal - infoPtr->minVal + 1;
1698
1699 /* Make sure the pos is inside the range */
1700
1701 if (infoPtr->curVal < infoPtr->minVal)
1702 infoPtr->curVal = infoPtr->minVal;
1703 else if (infoPtr->curVal > infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1704 infoPtr->curVal = infoPtr->maxVal - max( infoPtr->page-1, 0 );
1705
1706 TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1707 infoPtr->page, infoPtr->curVal,
1708 infoPtr->minVal, infoPtr->maxVal );
1709
1710 /* don't change the scrollbar state if SetScrollInfo
1711 * is just called with SIF_DISABLENOSCROLL
1712 */
1713 if(!(info->fMask & SIF_ALL)) goto done;
1714
1715 /* Check if the scrollbar should be hidden or disabled */
1716
1717 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1718 {
1719 new_flags = infoPtr->flags;
1720 if (infoPtr->minVal >= infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1721 {
1722 /* Hide or disable scroll-bar */
1723 if (info->fMask & SIF_DISABLENOSCROLL)
1724 {
1725 new_flags = ESB_DISABLE_BOTH;
1726 action |= SA_SSI_REFRESH;
1727 }
1728 else if ((nBar != SB_CTL) && (action & SA_SSI_REFRESH))
1729 {
1730 action = SA_SSI_HIDE;
1731 }
1732 }
1733 else /* Show and enable scroll-bar only if no page only changed. */
1734 if (info->fMask != SIF_PAGE)
1735 {
1736 new_flags = ESB_ENABLE_BOTH;
1737 if ((nBar != SB_CTL) && ( (action & SA_SSI_REFRESH) ))
1738 action |= SA_SSI_SHOW;
1739 }
1740
1741 if (infoPtr->flags != new_flags) /* check arrow flags */
1742 {
1743 infoPtr->flags = new_flags;
1744 action |= SA_SSI_REPAINT_ARROWS;
1745 }
1746 }
1747
1748 done:
1749 if( action & SA_SSI_HIDE )
1750 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1751 else
1752 {
1753 if( action & SA_SSI_SHOW )
1754 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1755 return infoPtr->curVal; /* SetWindowPos() already did the painting */
1756
1757 if( bRedraw )
1758 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1759 else if( action & SA_SSI_REPAINT_ARROWS )
1760 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1761 }
1762
1763 /* Return current position */
1764 return infoPtr->curVal;
1765 }
1766
1767
1768 /*************************************************************************
1769 * GetScrollInfo (USER32.@)
1770 *
1771 * GetScrollInfo can be used to retrieve the position, upper bound,
1772 * lower bound, and page size of a scrollbar control.
1773 *
1774 * PARAMS
1775 * hwnd [I] Handle of window with scrollbar(s)
1776 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1777 * info [IO] fMask specifies which values to retrieve
1778 *
1779 * RETURNS
1780 * TRUE if SCROLLINFO is filled
1781 * ( if nBar is SB_CTL, GetScrollInfo returns TRUE even if nothing
1782 * is filled)
1783 */
1784 BOOL WINAPI GetScrollInfo(HWND hwnd, INT nBar, LPSCROLLINFO info)
1785 {
1786 TRACE("hwnd=%p nBar=%d info=%p\n", hwnd, nBar, info);
1787
1788 /* Refer SB_CTL requests to the window */
1789 if (nBar == SB_CTL)
1790 {
1791 SendMessageW(hwnd, SBM_GETSCROLLINFO, 0, (LPARAM)info);
1792 return TRUE;
1793 }
1794 return SCROLL_GetScrollInfo(hwnd, nBar, info);
1795 }
1796
1797
1798 /*************************************************************************
1799 * GetScrollBarInfo (USER32.@)
1800 *
1801 * GetScrollBarInfo can be used to retrieve information about a scrollbar
1802 * control.
1803 *
1804 * PARAMS
1805 * hwnd [I] Handle of window with scrollbar(s)
1806 * idObject [I] One of OBJID_CLIENT, OBJID_HSCROLL, or OBJID_VSCROLL
1807 * info [IO] cbSize specifies the size of SCROLLBARINFO
1808 *
1809 * RETURNS
1810 * TRUE if success
1811 */
1812 BOOL WINAPI GetScrollBarInfo(HWND hwnd, LONG idObject, LPSCROLLBARINFO info)
1813 {
1814 TRACE("hwnd=%p idObject=%d info=%p\n", hwnd, idObject, info);
1815
1816 /* Refer OBJID_CLIENT requests to the window */
1817 if (idObject == OBJID_CLIENT)
1818 return SendMessageW(hwnd, SBM_GETSCROLLBARINFO, 0, (LPARAM)info);
1819 else
1820 return SCROLL_GetScrollBarInfo(hwnd, idObject, info);
1821 }
1822
1823
1824 /*************************************************************************
1825 * SetScrollPos (USER32.@)
1826 *
1827 * Sets the current position of the scroll thumb.
1828 *
1829 * PARAMS
1830 * hwnd [I] Handle of window with scrollbar(s)
1831 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1832 * nPos [I] New value
1833 * bRedraw [I] Should scrollbar be redrawn afterwards?
1834 *
1835 * RETURNS
1836 * Success: Scrollbar position
1837 * Failure: 0
1838 *
1839 * REMARKS
1840 * Note the ambiguity when 0 is returned. Use GetLastError
1841 * to make sure there was an error (and to know which one).
1842 */
1843 INT WINAPI SetScrollPos( HWND hwnd, INT nBar, INT nPos, BOOL bRedraw)
1844 {
1845 SCROLLINFO info;
1846 SCROLLBAR_INFO *infoPtr;
1847 INT oldPos;
1848
1849 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, FALSE ))) return 0;
1850 oldPos = infoPtr->curVal;
1851 info.cbSize = sizeof(info);
1852 info.nPos = nPos;
1853 info.fMask = SIF_POS;
1854 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1855 return oldPos;
1856 }
1857
1858
1859 /*************************************************************************
1860 * GetScrollPos (USER32.@)
1861 *
1862 * Gets the current position of the scroll thumb.
1863 *
1864 * PARAMS
1865 * hwnd [I] Handle of window with scrollbar(s)
1866 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1867 *
1868 * RETURNS
1869 * Success: Current position
1870 * Failure: 0
1871 *
1872 * REMARKS
1873 * There is ambiguity when 0 is returned. Use GetLastError
1874 * to make sure there was an error (and to know which one).
1875 */
1876 INT WINAPI GetScrollPos(HWND hwnd, INT nBar)
1877 {
1878 TRACE("hwnd=%p nBar=%d\n", hwnd, nBar);
1879
1880 /* Refer SB_CTL requests to the window */
1881 if (nBar == SB_CTL)
1882 return SendMessageW(hwnd, SBM_GETPOS, 0, 0);
1883 else
1884 return SCROLL_GetScrollPos(hwnd, nBar);
1885 }
1886
1887
1888 /*************************************************************************
1889 * SetScrollRange (USER32.@)
1890 * The SetScrollRange function sets the minimum and maximum scroll box positions
1891 * If nMinPos and nMaxPos is the same value, the scroll bar will hide
1892 *
1893 * Sets the range of the scroll bar.
1894 *
1895 * PARAMS
1896 * hwnd [I] Handle of window with scrollbar(s)
1897 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1898 * minVal [I] New minimum value
1899 * maxVal [I] New Maximum value
1900 * bRedraw [I] Should scrollbar be redrawn afterwards?
1901 *
1902 * RETURNS
1903 * Success: TRUE
1904 * Failure: FALSE
1905 */
1906 BOOL WINAPI SetScrollRange(HWND hwnd, INT nBar, INT minVal, INT maxVal, BOOL bRedraw)
1907 {
1908 SCROLLINFO info;
1909
1910 TRACE("hwnd=%p nBar=%d min=%d max=%d, bRedraw=%d\n", hwnd, nBar, minVal, maxVal, bRedraw);
1911
1912 info.cbSize = sizeof(info);
1913 info.fMask = SIF_RANGE;
1914 info.nMin = minVal;
1915 info.nMax = maxVal;
1916 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1917 return TRUE;
1918 }
1919
1920
1921 /*************************************************************************
1922 * GetScrollRange (USER32.@)
1923 *
1924 * Gets the range of the scroll bar.
1925 *
1926 * PARAMS
1927 * hwnd [I] Handle of window with scrollbar(s)
1928 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1929 * lpMin [O] Where to store minimum value
1930 * lpMax [O] Where to store maximum value
1931 *
1932 * RETURNS
1933 * TRUE if values is filled
1934 */
1935 BOOL WINAPI GetScrollRange(HWND hwnd, INT nBar, LPINT lpMin, LPINT lpMax)
1936 {
1937 TRACE("hwnd=%p nBar=%d lpMin=%p lpMax=%p\n", hwnd, nBar, lpMin, lpMax);
1938
1939 /* Refer SB_CTL requests to the window */
1940 if (nBar == SB_CTL)
1941 SendMessageW(hwnd, SBM_GETRANGE, (WPARAM)lpMin, (LPARAM)lpMax);
1942 else
1943 SCROLL_GetScrollRange(hwnd, nBar, lpMin, lpMax);
1944
1945 return TRUE;
1946 }
1947
1948
1949 /*************************************************************************
1950 * SCROLL_ShowScrollBar()
1951 *
1952 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1953 */
1954 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar, BOOL fShowH, BOOL fShowV )
1955 {
1956 ULONG old_style, set_bits = 0, clear_bits = 0;
1957
1958 TRACE("hwnd=%p bar=%d horz=%d, vert=%d\n", hwnd, nBar, fShowH, fShowV );
1959
1960 switch(nBar)
1961 {
1962 case SB_CTL:
1963 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1964 return TRUE;
1965
1966 case SB_BOTH:
1967 case SB_HORZ:
1968 if (fShowH) set_bits |= WS_HSCROLL;
1969 else clear_bits |= WS_HSCROLL;
1970 if( nBar == SB_HORZ ) break;
1971 /* fall through */
1972 case SB_VERT:
1973 if (fShowV) set_bits |= WS_VSCROLL;
1974 else clear_bits |= WS_VSCROLL;
1975 break;
1976
1977 default:
1978 return FALSE; /* Nothing to do! */
1979 }
1980
1981 old_style = WIN_SetStyle( hwnd, set_bits, clear_bits );
1982 if ((old_style & clear_bits) != 0 || (old_style & set_bits) != set_bits)
1983 {
1984 /* frame has been changed, let the window redraw itself */
1985 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1986 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1987 return TRUE;
1988 }
1989 return FALSE; /* no frame changes */
1990 }
1991
1992
1993 /*************************************************************************
1994 * ShowScrollBar (USER32.@)
1995 *
1996 * Shows or hides the scroll bar.
1997 *
1998 * PARAMS
1999 * hwnd [I] Handle of window with scrollbar(s)
2000 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
2001 * fShow [I] TRUE = show, FALSE = hide
2002 *
2003 * RETURNS
2004 * Success: TRUE
2005 * Failure: FALSE
2006 */
2007 BOOL WINAPI ShowScrollBar(HWND hwnd, INT nBar, BOOL fShow)
2008 {
2009 if ( !hwnd )
2010 return FALSE;
2011
2012 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
2013 (nBar == SB_HORZ) ? 0 : fShow );
2014 return TRUE;
2015 }
2016
2017
2018 /*************************************************************************
2019 * EnableScrollBar (USER32.@)
2020 *
2021 * Enables or disables the scroll bars.
2022 */
2023 BOOL WINAPI EnableScrollBar( HWND hwnd, UINT nBar, UINT flags )
2024 {
2025 BOOL bFineWithMe;
2026 SCROLLBAR_INFO *infoPtr;
2027
2028 flags &= ESB_DISABLE_BOTH;
2029
2030 if (nBar == SB_BOTH)
2031 {
2032 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, SB_VERT, TRUE ))) return FALSE;
2033 if (!(bFineWithMe = (infoPtr->flags == flags)) )
2034 {
2035 infoPtr->flags = flags;
2036 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
2037 }
2038 nBar = SB_HORZ;
2039 }
2040 else
2041 bFineWithMe = TRUE;
2042
2043 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, TRUE ))) return FALSE;
2044 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
2045 infoPtr->flags = flags;
2046
2047 if (nBar == SB_CTL && (flags == ESB_DISABLE_BOTH || flags == ESB_ENABLE_BOTH))
2048 EnableWindow(hwnd, flags == ESB_ENABLE_BOTH);
2049
2050 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
2051 return TRUE;
2052 }
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