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msvcrt20: Forward more functions to msvcrt.dll.
[wine/multimedia.git] / dlls / user32 / scroll.c
blob423dea1b9d1f5a525738dc7d4d0961b5e4bfc808
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 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
227 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
228 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
229 lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
230 if(wndPtr->dwStyle & WS_VSCROLL)
231 lprect->right++;
232 vertical = FALSE;
233 break;
234
235 case SB_VERT:
236 if((wndPtr->dwExStyle & WS_EX_LEFTSCROLLBAR) != 0)
237 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left - GetSystemMetrics(SM_CXVSCROLL);
238 else
239 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
240 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
241 lprect->right = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
242 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
243 if(wndPtr->dwStyle & WS_HSCROLL)
244 lprect->bottom++;
245 vertical = TRUE;
246 break;
247
248 case SB_CTL:
249 GetClientRect( hwnd, lprect );
250 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
251 break;
252
253 default:
254 WIN_ReleasePtr( wndPtr );
255 return FALSE;
256 }
257
258 if (vertical) pixels = lprect->bottom - lprect->top;
259 else pixels = lprect->right - lprect->left;
260
261 if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
262 {
263 if (pixels > SCROLL_MIN_RECT)
264 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
265 else
266 *arrowSize = 0;
267 *thumbPos = *thumbSize = 0;
268 }
269 else
270 {
271 SCROLLBAR_INFO *info = SCROLL_GetInternalInfo( hwnd, nBar, FALSE );
272 if (!info)
273 {
274 WARN("called for missing scroll bar\n");
275 WIN_ReleasePtr( wndPtr );
276 return FALSE;
277 }
278 *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
279 pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
280
281 if (info->page)
282 {
283 *thumbSize = MulDiv(pixels,info->page,(info->maxVal-info->minVal+1));
284 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
285 }
286 else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
287
288 if (((pixels -= *thumbSize ) < 0) ||
289 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
290 {
291 /* Rectangle too small or scrollbar disabled -> no thumb */
292 *thumbPos = *thumbSize = 0;
293 }
294 else
295 {
296 INT max = info->maxVal - max( info->page-1, 0 );
297 if (info->minVal >= max)
298 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
299 else
300 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
301 + MulDiv(pixels, (info->curVal-info->minVal),(max - info->minVal));
302 }
303 }
304 WIN_ReleasePtr( wndPtr );
305 return vertical;
306 }
307
308
309 /***********************************************************************
310 * SCROLL_GetThumbVal
311 *
312 * Compute the current scroll position based on the thumb position in pixels
313 * from the top of the scroll-bar.
314 */
315 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
316 BOOL vertical, INT pos )
317 {
318 INT thumbSize;
319 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
320 INT range;
321
322 if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
323 return infoPtr->minVal;
324
325 if (infoPtr->page)
326 {
327 thumbSize = MulDiv(pixels,infoPtr->page,(infoPtr->maxVal-infoPtr->minVal+1));
328 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
329 }
330 else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
331
332 if ((pixels -= thumbSize) <= 0) return infoPtr->minVal;
333
334 pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
335 if (pos > pixels) pos = pixels;
336
337 if (!infoPtr->page)
338 range = infoPtr->maxVal - infoPtr->minVal;
339 else
340 range = infoPtr->maxVal - infoPtr->minVal - infoPtr->page + 1;
341
342 return infoPtr->minVal + MulDiv(pos, range, pixels);
343 }
344
345 /***********************************************************************
346 * SCROLL_PtInRectEx
347 */
348 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
349 {
350 RECT rect = *lpRect;
351 int scrollbarWidth;
352
353 /* Pad hit rect to allow mouse to be dragged outside of scrollbar and
354 * still be considered in the scrollbar. */
355 if (vertical)
356 {
357 scrollbarWidth = lpRect->right - lpRect->left;
358 rect.left -= scrollbarWidth*8;
359 rect.right += scrollbarWidth*8;
360 rect.top -= scrollbarWidth*2;
361 rect.bottom += scrollbarWidth*2;
362 }
363 else
364 {
365 scrollbarWidth = lpRect->bottom - lpRect->top;
366 rect.left -= scrollbarWidth*2;
367 rect.right += scrollbarWidth*2;
368 rect.top -= scrollbarWidth*8;
369 rect.bottom += scrollbarWidth*8;
370 }
371 return PtInRect( &rect, pt );
372 }
373
374 /***********************************************************************
375 * SCROLL_ClipPos
376 */
377 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
378 {
379 if( pt.x < lpRect->left )
380 pt.x = lpRect->left;
381 else
382 if( pt.x > lpRect->right )
383 pt.x = lpRect->right;
384
385 if( pt.y < lpRect->top )
386 pt.y = lpRect->top;
387 else
388 if( pt.y > lpRect->bottom )
389 pt.y = lpRect->bottom;
390
391 return pt;
392 }
393
394
395 /***********************************************************************
396 * SCROLL_HitTest
397 *
398 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
399 */
400 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
401 POINT pt, BOOL bDragging )
402 {
403 INT arrowSize, thumbSize, thumbPos;
404 RECT rect;
405
406 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
407 &arrowSize, &thumbSize, &thumbPos );
408
409 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
410 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
411
412 if (vertical)
413 {
414 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
415 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
416 if (!thumbPos) return SCROLL_TOP_RECT;
417 pt.y -= rect.top;
418 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
419 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
420 }
421 else /* horizontal */
422 {
423 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
424 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
425 if (!thumbPos) return SCROLL_TOP_RECT;
426 pt.x -= rect.left;
427 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
428 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
429 }
430 return SCROLL_THUMB;
431 }
432
433
434 /***********************************************************************
435 * SCROLL_DrawArrows
436 *
437 * Draw the scroll bar arrows.
438 */
439 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
440 RECT *rect, INT arrowSize, BOOL vertical,
441 BOOL top_pressed, BOOL bottom_pressed )
442 {
443 RECT r;
444
445 r = *rect;
446 if( vertical )
447 r.bottom = r.top + arrowSize;
448 else
449 r.right = r.left + arrowSize;
450
451 DrawFrameControl( hdc, &r, DFC_SCROLL,
452 (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
453 | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
454 | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
455
456 r = *rect;
457 if( vertical )
458 r.top = r.bottom-arrowSize;
459 else
460 r.left = r.right-arrowSize;
461
462 DrawFrameControl( hdc, &r, DFC_SCROLL,
463 (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
464 | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
465 | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
466 }
467
468 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
469 INT arrowSize, INT thumbSize )
470 {
471 INT pos = SCROLL_TrackingPos;
472 INT max_size;
473
474 if( vertical )
475 max_size = rect->bottom - rect->top;
476 else
477 max_size = rect->right - rect->left;
478
479 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
480
481 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
482 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
483 else if( pos > max_size )
484 pos = max_size;
485
486 SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
487 rect, arrowSize, thumbSize, pos,
488 0, vertical, FALSE, FALSE );
489
490 SCROLL_MovingThumb = !SCROLL_MovingThumb;
491 }
492
493 /***********************************************************************
494 * SCROLL_DrawInterior
495 *
496 * Draw the scroll bar interior (everything except the arrows).
497 */
498 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
499 RECT *rect, INT arrowSize,
500 INT thumbSize, INT thumbPos,
501 UINT flags, BOOL vertical,
502 BOOL top_selected, BOOL bottom_selected )
503 {
504 RECT r;
505 HPEN hSavePen;
506 HBRUSH hSaveBrush,hBrush;
507
508 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
509 * The window-owned scrollbars need to call DEFWND_ControlColor
510 * to correctly setup default scrollbar colors
511 */
512 if (nBar == SB_CTL)
513 {
514 hBrush = (HBRUSH)SendMessageW( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
515 (WPARAM)hdc,(LPARAM)hwnd);
516 }
517 else
518 {
519 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
520 }
521
522 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
523 hSaveBrush = SelectObject( hdc, hBrush );
524
525 /* Calculate the scroll rectangle */
526 r = *rect;
527 if (vertical)
528 {
529 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
530 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
531 }
532 else
533 {
534 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
535 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
536 }
537
538 /* Draw the scroll rectangles and thumb */
539 if (!thumbPos) /* No thumb to draw */
540 {
541 PatBlt( hdc, r.left, r.top,
542 r.right - r.left, r.bottom - r.top,
543 PATCOPY );
544
545 /* cleanup and return */
546 SelectObject( hdc, hSavePen );
547 SelectObject( hdc, hSaveBrush );
548 return;
549 }
550
551 if (vertical)
552 {
553 PatBlt( hdc, r.left, r.top,
554 r.right - r.left,
555 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
556 top_selected ? 0x0f0000 : PATCOPY );
557 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
558 PatBlt( hdc, r.left, r.top + thumbSize,
559 r.right - r.left,
560 r.bottom - r.top - thumbSize,
561 bottom_selected ? 0x0f0000 : PATCOPY );
562 r.bottom = r.top + thumbSize;
563 }
564 else /* horizontal */
565 {
566 PatBlt( hdc, r.left, r.top,
567 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
568 r.bottom - r.top,
569 top_selected ? 0x0f0000 : PATCOPY );
570 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
571 PatBlt( hdc, r.left + thumbSize, r.top,
572 r.right - r.left - thumbSize,
573 r.bottom - r.top,
574 bottom_selected ? 0x0f0000 : PATCOPY );
575 r.right = r.left + thumbSize;
576 }
577
578 /* Draw the thumb */
579 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
580
581 /* cleanup */
582 SelectObject( hdc, hSavePen );
583 SelectObject( hdc, hSaveBrush );
584 }
585
586
587 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
588 RECT *rect, INT arrowSize,
589 INT thumbSize, INT thumbPos,
590 UINT flags, BOOL vertical,
591 BOOL top_selected, BOOL bottom_selected )
592 {
593 RECT r;
594 HPEN hSavePen;
595 HBRUSH hSaveBrush,hBrush;
596 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
597
598 if (Save_SCROLL_MovingThumb &&
599 (SCROLL_TrackingWin == hwnd) &&
600 (SCROLL_TrackingBar == nBar))
601 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
602
603 /* Select the correct brush and pen */
604
605 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
606 * The window-owned scrollbars need to call DEFWND_ControlColor
607 * to correctly setup default scrollbar colors
608 */
609 if (nBar == SB_CTL) {
610 hBrush = (HBRUSH)SendMessageW( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
611 (WPARAM)hdc,(LPARAM)hwnd);
612 } else {
613 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
614 }
615 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
616 hSaveBrush = SelectObject( hdc, hBrush );
617
618 /* Calculate the scroll rectangle */
619
620 r = *rect;
621 if (vertical)
622 {
623 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
624 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
625 }
626 else
627 {
628 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
629 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
630 }
631
632 /* Draw the scroll bar frame */
633
634 /* Draw the scroll rectangles and thumb */
635
636 if (!thumbPos) /* No thumb to draw */
637 {
638 PatBlt( hdc, r.left, r.top, r.right - r.left, r.bottom - r.top, PATCOPY );
639
640 /* cleanup and return */
641 SelectObject( hdc, hSavePen );
642 SelectObject( hdc, hSaveBrush );
643 return;
644 }
645
646 if (vertical)
647 {
648 PatBlt( hdc, r.left, r.top, r.right - r.left,
649 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
650 top_selected ? 0x0f0000 : PATCOPY );
651 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
652 PatBlt( hdc, r.left, r.top + thumbSize, r.right - r.left,
653 r.bottom - r.top - thumbSize,
654 bottom_selected ? 0x0f0000 : PATCOPY );
655 r.bottom = r.top + thumbSize;
656 }
657 else /* horizontal */
658 {
659 PatBlt( hdc, r.left, r.top,
660 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
661 r.bottom - r.top, top_selected ? 0x0f0000 : PATCOPY );
662 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
663 PatBlt( hdc, r.left + thumbSize, r.top, r.right - r.left - thumbSize,
664 r.bottom - r.top, bottom_selected ? 0x0f0000 : PATCOPY );
665 r.right = r.left + thumbSize;
666 }
667
668 /* Draw the thumb */
669
670 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
671 Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
672 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
673
674 if (Save_SCROLL_MovingThumb &&
675 (SCROLL_TrackingWin == hwnd) &&
676 (SCROLL_TrackingBar == nBar))
677 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
678
679 /* cleanup */
680 SelectObject( hdc, hSavePen );
681 SelectObject( hdc, hSaveBrush );
682 }
683
684
685 /***********************************************************************
686 * SCROLL_DrawScrollBar
687 *
688 * Redraw the whole scrollbar.
689 */
690 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
691 BOOL arrows, BOOL interior )
692 {
693 INT arrowSize, thumbSize, thumbPos;
694 RECT rect;
695 BOOL vertical;
696 SCROLLBAR_INFO *infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, TRUE );
697 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
698 DWORD style = GetWindowLongW( hwnd, GWL_STYLE );
699
700 if (!(hwnd = WIN_GetFullHandle( hwnd ))) return;
701
702 if (!infoPtr ||
703 ((nBar == SB_VERT) && !(style & WS_VSCROLL)) ||
704 ((nBar == SB_HORZ) && !(style & WS_HSCROLL))) return;
705 if (!WIN_IsWindowDrawable( hwnd, FALSE )) return;
706
707 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
708 &arrowSize, &thumbSize, &thumbPos );
709
710 /* do not draw if the scrollbar rectangle is empty */
711 if(IsRectEmpty(&rect)) return;
712
713 if (Save_SCROLL_MovingThumb &&
714 (SCROLL_TrackingWin == hwnd) &&
715 (SCROLL_TrackingBar == nBar))
716 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
717
718 /* Draw the arrows */
719
720 if (arrows && arrowSize)
721 {
722 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
723 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
724 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
725 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
726 else
727 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
728 FALSE, FALSE );
729 }
730 if( interior )
731 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
732 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
733
734 if (Save_SCROLL_MovingThumb &&
735 (SCROLL_TrackingWin == hwnd) &&
736 (SCROLL_TrackingBar == nBar))
737 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
738
739 /* if scroll bar has focus, reposition the caret */
740 if(hwnd==GetFocus() && (nBar==SB_CTL))
741 {
742 if (!vertical)
743 {
744 SetCaretPos(thumbPos+1, rect.top+1);
745 }
746 else
747 {
748 SetCaretPos(rect.top+1, thumbPos+1);
749 }
750 }
751 }
752
753 /***********************************************************************
754 * SCROLL_DrawSizeGrip
755 *
756 * Draw the size grip.
757 */
758 static void SCROLL_DrawSizeGrip( HWND hwnd, HDC hdc)
759 {
760 RECT rc;
761
762 GetClientRect( hwnd, &rc );
763 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
764 rc.left = max( rc.left, rc.right - GetSystemMetrics(SM_CXVSCROLL) - 1 );
765 rc.top = max( rc.top, rc.bottom - GetSystemMetrics(SM_CYHSCROLL) - 1 );
766 DrawFrameControl( hdc, &rc, DFC_SCROLL, DFCS_SCROLLSIZEGRIP );
767 }
768
769
770 /***********************************************************************
771 * SCROLL_RefreshScrollBar
772 *
773 * Repaint the scroll bar interior after a SetScrollRange() or
774 * SetScrollPos() call.
775 */
776 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
777 BOOL arrows, BOOL interior )
778 {
779 HDC hdc = GetDCEx( hwnd, 0,
780 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
781 if (!hdc) return;
782
783 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
784 ReleaseDC( hwnd, hdc );
785 }
786
787
788 /***********************************************************************
789 * SCROLL_HandleKbdEvent
790 *
791 * Handle a keyboard event (only for SB_CTL scrollbars with focus).
792 *
793 * PARAMS
794 * hwnd [I] Handle of window with scrollbar(s)
795 * wParam [I] Variable input including enable state
796 * lParam [I] Variable input including input point
797 */
798 static void SCROLL_HandleKbdEvent(HWND hwnd, WPARAM wParam, LPARAM lParam)
799 {
800 TRACE("hwnd=%p wParam=%ld lParam=%ld\n", hwnd, wParam, lParam);
801
802 /* hide caret on first KEYDOWN to prevent flicker */
803 if ((lParam & PFD_DOUBLEBUFFER_DONTCARE) == 0)
804 HideCaret(hwnd);
805
806 switch(wParam)
807 {
808 case VK_PRIOR: wParam = SB_PAGEUP; break;
809 case VK_NEXT: wParam = SB_PAGEDOWN; break;
810 case VK_HOME: wParam = SB_TOP; break;
811 case VK_END: wParam = SB_BOTTOM; break;
812 case VK_UP: wParam = SB_LINEUP; break;
813 case VK_DOWN: wParam = SB_LINEDOWN; break;
814 case VK_LEFT: wParam = SB_LINEUP; break;
815 case VK_RIGHT: wParam = SB_LINEDOWN; break;
816 default: return;
817 }
818 SendMessageW(GetParent(hwnd),
819 ((GetWindowLongW( hwnd, GWL_STYLE ) & SBS_VERT) ?
820 WM_VSCROLL : WM_HSCROLL), wParam, (LPARAM)hwnd);
821 }
822
823
824 /***********************************************************************
825 * SCROLL_HandleScrollEvent
826 *
827 * Handle a mouse or timer event for the scrollbar.
828 * 'pt' is the location of the mouse event in client (for SB_CTL) or
829 * windows coordinates.
830 */
831 static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
832 {
833 /* Previous mouse position for timer events */
834 static POINT prevPt;
835 /* Thumb position when tracking started. */
836 static UINT trackThumbPos;
837 /* Position in the scroll-bar of the last button-down event. */
838 static INT lastClickPos;
839 /* Position in the scroll-bar of the last mouse event. */
840 static INT lastMousePos;
841
842 enum SCROLL_HITTEST hittest;
843 HWND hwndOwner, hwndCtl;
844 BOOL vertical;
845 INT arrowSize, thumbSize, thumbPos;
846 RECT rect;
847 HDC hdc;
848
849 SCROLLBAR_INFO *infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, FALSE );
850 if (!infoPtr) return;
851 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
852 return;
853
854 if (nBar == SB_CTL && (GetWindowLongW( hwnd, GWL_STYLE ) & (SBS_SIZEGRIP | SBS_SIZEBOX)))
855 {
856 switch(msg)
857 {
858 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
859 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
860 SetCapture( hwnd );
861 prevPt = pt;
862 SCROLL_trackHitTest = hittest = SCROLL_THUMB;
863 break;
864 case WM_MOUSEMOVE:
865 GetClientRect(GetParent(GetParent(hwnd)),&rect);
866 prevPt = pt;
867 break;
868 case WM_LBUTTONUP:
869 ReleaseCapture();
870 SCROLL_trackHitTest = hittest = SCROLL_NOWHERE;
871 if (hwnd==GetFocus()) ShowCaret(hwnd);
872 break;
873 case WM_SYSTIMER:
874 pt = prevPt;
875 break;
876 }
877 return;
878 }
879
880 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
881 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
882 &arrowSize, &thumbSize, &thumbPos );
883 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
884 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
885
886 switch(msg)
887 {
888 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
889 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
890 SCROLL_trackVertical = vertical;
891 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
892 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
893 lastMousePos = lastClickPos;
894 trackThumbPos = thumbPos;
895 prevPt = pt;
896 if (nBar == SB_CTL && (GetWindowLongW(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
897 SetCapture( hwnd );
898 break;
899
900 case WM_MOUSEMOVE:
901 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
902 prevPt = pt;
903 break;
904
905 case WM_LBUTTONUP:
906 hittest = SCROLL_NOWHERE;
907 ReleaseCapture();
908 /* if scrollbar has focus, show back caret */
909 if (hwnd==GetFocus()) ShowCaret(hwnd);
910 break;
911
912 case WM_SYSTIMER:
913 pt = prevPt;
914 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
915 break;
916
917 default:
918 return; /* Should never happen */
919 }
920
921 TRACE("Event: hwnd=%p bar=%d msg=%s pt=%d,%d hit=%d\n",
922 hwnd, nBar, SPY_GetMsgName(msg,hwnd), pt.x, pt.y, hittest );
923
924 switch(SCROLL_trackHitTest)
925 {
926 case SCROLL_NOWHERE: /* No tracking in progress */
927 break;
928
929 case SCROLL_TOP_ARROW:
930 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
931 (hittest == SCROLL_trackHitTest), FALSE );
932 if (hittest == SCROLL_trackHitTest)
933 {
934 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
935 {
936 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
937 SB_LINEUP, (LPARAM)hwndCtl );
938 }
939
940 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
941 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, NULL );
942 }
943 else KillSystemTimer( hwnd, SCROLL_TIMER );
944 break;
945
946 case SCROLL_TOP_RECT:
947 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
948 thumbPos, infoPtr->flags, vertical,
949 (hittest == SCROLL_trackHitTest), FALSE );
950 if (hittest == SCROLL_trackHitTest)
951 {
952 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
953 {
954 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
955 SB_PAGEUP, (LPARAM)hwndCtl );
956 }
957 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
958 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, NULL );
959 }
960 else KillSystemTimer( hwnd, SCROLL_TIMER );
961 break;
962
963 case SCROLL_THUMB:
964 if (msg == WM_LBUTTONDOWN)
965 {
966 SCROLL_TrackingWin = hwnd;
967 SCROLL_TrackingBar = nBar;
968 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
969 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
970 vertical,
971 SCROLL_TrackingPos );
972 if (!SCROLL_MovingThumb)
973 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
974 }
975 else if (msg == WM_LBUTTONUP)
976 {
977 if (SCROLL_MovingThumb)
978 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
979
980 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
981 thumbPos, infoPtr->flags, vertical,
982 FALSE, FALSE );
983 }
984 else /* WM_MOUSEMOVE */
985 {
986 INT pos;
987
988 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
989 else
990 {
991 pt = SCROLL_ClipPos( &rect, pt );
992 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
993 }
994 if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
995 {
996 if (SCROLL_MovingThumb)
997 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
998 arrowSize, thumbSize );
999 lastMousePos = pos;
1000 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
1001 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1002 vertical,
1003 SCROLL_TrackingPos );
1004 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1005 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1006 (LPARAM)hwndCtl );
1007 if (!SCROLL_MovingThumb)
1008 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1009 arrowSize, thumbSize );
1010 }
1011 }
1012 break;
1013
1014 case SCROLL_BOTTOM_RECT:
1015 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1016 thumbPos, infoPtr->flags, vertical,
1017 FALSE, (hittest == SCROLL_trackHitTest) );
1018 if (hittest == SCROLL_trackHitTest)
1019 {
1020 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1021 {
1022 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1023 SB_PAGEDOWN, (LPARAM)hwndCtl );
1024 }
1025 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1026 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, NULL );
1027 }
1028 else KillSystemTimer( hwnd, SCROLL_TIMER );
1029 break;
1030
1031 case SCROLL_BOTTOM_ARROW:
1032 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1033 FALSE, (hittest == SCROLL_trackHitTest) );
1034 if (hittest == SCROLL_trackHitTest)
1035 {
1036 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1037 {
1038 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1039 SB_LINEDOWN, (LPARAM)hwndCtl );
1040 }
1041
1042 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1043 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, NULL );
1044 }
1045 else KillSystemTimer( hwnd, SCROLL_TIMER );
1046 break;
1047 }
1048
1049 if (msg == WM_LBUTTONDOWN)
1050 {
1051
1052 if (hittest == SCROLL_THUMB)
1053 {
1054 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1055 trackThumbPos + lastMousePos - lastClickPos );
1056 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1057 MAKEWPARAM( SB_THUMBTRACK, val ), (LPARAM)hwndCtl );
1058 }
1059 }
1060
1061 if (msg == WM_LBUTTONUP)
1062 {
1063 hittest = SCROLL_trackHitTest;
1064 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1065
1066 if (hittest == SCROLL_THUMB)
1067 {
1068 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1069 trackThumbPos + lastMousePos - lastClickPos );
1070 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1071 MAKEWPARAM( SB_THUMBPOSITION, val ), (LPARAM)hwndCtl );
1072 }
1073 /* SB_ENDSCROLL doesn't report thumb position */
1074 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1075 SB_ENDSCROLL, (LPARAM)hwndCtl );
1076
1077 /* Terminate tracking */
1078 SCROLL_TrackingWin = 0;
1079 }
1080
1081 ReleaseDC( hwnd, hdc );
1082 }
1083
1084
1085 /***********************************************************************
1086 * SCROLL_TrackScrollBar
1087 *
1088 * Track a mouse button press on a scroll-bar.
1089 * pt is in screen-coordinates for non-client scroll bars.
1090 */
1091 void SCROLL_TrackScrollBar( HWND hwnd, INT scrollbar, POINT pt )
1092 {
1093 MSG msg;
1094 INT xoffset = 0, yoffset = 0;
1095
1096 if (scrollbar != SB_CTL)
1097 {
1098 WND *wndPtr = WIN_GetPtr( hwnd );
1099 if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return;
1100 xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
1101 yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
1102 WIN_ReleasePtr( wndPtr );
1103 ScreenToClient( hwnd, &pt );
1104 pt.x += xoffset;
1105 pt.y += yoffset;
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);
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 {
1430 POINT pt;
1431 pt.x = (short)LOWORD(lParam);
1432 pt.y = (short)HIWORD(lParam);
1433 SCROLL_TrackScrollBar( hwnd, SB_CTL, pt );
1434 }
1435 break;
1436 case WM_LBUTTONUP:
1437 case WM_MOUSEMOVE:
1438 case WM_SYSTIMER:
1439 {
1440 POINT pt;
1441 pt.x = (short)LOWORD(lParam);
1442 pt.y = (short)HIWORD(lParam);
1443 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1444 }
1445 break;
1446
1447 case WM_KEYDOWN:
1448 SCROLL_HandleKbdEvent(hwnd, wParam, lParam);
1449 break;
1450
1451 case WM_KEYUP:
1452 ShowCaret(hwnd);
1453 break;
1454
1455 case WM_SETFOCUS:
1456 {
1457 /* Create a caret when a ScrollBar get focus */
1458 RECT rect;
1459 int arrowSize, thumbSize, thumbPos, vertical;
1460 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1461 &arrowSize, &thumbSize, &thumbPos );
1462 if (!vertical)
1463 {
1464 CreateCaret(hwnd, (HBITMAP)1, thumbSize-2, rect.bottom-rect.top-2);
1465 SetCaretPos(thumbPos+1, rect.top+1);
1466 }
1467 else
1468 {
1469 CreateCaret(hwnd, (HBITMAP)1, rect.right-rect.left-2,thumbSize-2);
1470 SetCaretPos(rect.top+1, thumbPos+1);
1471 }
1472 ShowCaret(hwnd);
1473 }
1474 break;
1475
1476 case WM_KILLFOCUS:
1477 {
1478 RECT rect;
1479 int arrowSize, thumbSize, thumbPos, vertical;
1480 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1481 if (!vertical){
1482 rect.left=thumbPos+1;
1483 rect.right=rect.left+thumbSize;
1484 }
1485 else
1486 {
1487 rect.top=thumbPos+1;
1488 rect.bottom=rect.top+thumbSize;
1489 }
1490 HideCaret(hwnd);
1491 InvalidateRect(hwnd,&rect,0);
1492 DestroyCaret();
1493 }
1494 break;
1495
1496 case WM_ERASEBKGND:
1497 return 1;
1498
1499 case WM_GETDLGCODE:
1500 return DLGC_WANTARROWS; /* Windows returns this value */
1501
1502 case WM_PAINT:
1503 {
1504 PAINTSTRUCT ps;
1505 HDC hdc = wParam ? (HDC)wParam : BeginPaint(hwnd, &ps);
1506 if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEGRIP)
1507 {
1508 SCROLL_DrawSizeGrip( hwnd, hdc);
1509 }
1510 else if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEBOX)
1511 {
1512 RECT rc;
1513 GetClientRect( hwnd, &rc );
1514 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
1515 }
1516 else
1517 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1518 if (!wParam) EndPaint(hwnd, &ps);
1519 }
1520 break;
1521
1522 case SBM_SETPOS:
1523 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1524
1525 case SBM_GETPOS:
1526 return SCROLL_GetScrollPos(hwnd, SB_CTL);
1527
1528 case SBM_SETRANGEREDRAW:
1529 case SBM_SETRANGE:
1530 {
1531 INT oldPos = SCROLL_GetScrollPos( hwnd, SB_CTL );
1532 SCROLL_SetScrollRange( hwnd, SB_CTL, wParam, lParam );
1533 if (message == SBM_SETRANGEREDRAW)
1534 SCROLL_RefreshScrollBar( hwnd, SB_CTL, TRUE, TRUE );
1535 if (oldPos != SCROLL_GetScrollPos( hwnd, SB_CTL )) return oldPos;
1536 }
1537 return 0;
1538
1539 case SBM_GETRANGE:
1540 return SCROLL_GetScrollRange(hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam);
1541
1542 case SBM_ENABLE_ARROWS:
1543 return EnableScrollBar( hwnd, SB_CTL, wParam );
1544
1545 case SBM_SETSCROLLINFO:
1546 return SCROLL_SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1547
1548 case SBM_GETSCROLLINFO:
1549 return SCROLL_GetScrollInfo(hwnd, SB_CTL, (SCROLLINFO *)lParam);
1550
1551 case SBM_GETSCROLLBARINFO:
1552 return SCROLL_GetScrollBarInfo(hwnd, OBJID_CLIENT, (SCROLLBARINFO *)lParam);
1553
1554 case 0x00e5:
1555 case 0x00e7:
1556 case 0x00e8:
1557 case 0x00ec:
1558 case 0x00ed:
1559 case 0x00ee:
1560 case 0x00ef:
1561 ERR("unknown Win32 msg %04x wp=%08lx lp=%08lx\n",
1562 message, wParam, lParam );
1563 break;
1564
1565 default:
1566 if (message >= WM_USER)
1567 WARN("unknown msg %04x wp=%04lx lp=%08lx\n",
1568 message, wParam, lParam );
1569 if (unicode)
1570 return DefWindowProcW( hwnd, message, wParam, lParam );
1571 else
1572 return DefWindowProcA( hwnd, message, wParam, lParam );
1573 }
1574 return 0;
1575 }
1576
1577
1578 /*************************************************************************
1579 * SetScrollInfo (USER32.@)
1580 *
1581 * SetScrollInfo can be used to set the position, upper bound,
1582 * lower bound, and page size of a scrollbar control.
1583 *
1584 * PARAMS
1585 * hwnd [I] Handle of window with scrollbar(s)
1586 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1587 * info [I] Specifies what to change and new values
1588 * bRedraw [I] Should scrollbar be redrawn afterwards?
1589 *
1590 * RETURNS
1591 * Scrollbar position
1592 *
1593 * NOTE
1594 * For 100 lines of text to be displayed in a window of 25 lines,
1595 * one would for instance use info->nMin=0, info->nMax=75
1596 * (corresponding to the 76 different positions of the window on
1597 * the text), and info->nPage=25.
1598 */
1599 INT WINAPI SetScrollInfo(HWND hwnd, INT nBar, const SCROLLINFO *info, BOOL bRedraw)
1600 {
1601 TRACE("hwnd=%p nBar=%d info=%p, bRedraw=%d\n", hwnd, nBar, info, bRedraw);
1602
1603 /* Refer SB_CTL requests to the window */
1604 if (nBar == SB_CTL)
1605 return SendMessageW(hwnd, SBM_SETSCROLLINFO, bRedraw, (LPARAM)info);
1606 else
1607 return SCROLL_SetScrollInfo( hwnd, nBar, info, bRedraw );
1608 }
1609
1610 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar, LPCSCROLLINFO info, BOOL bRedraw )
1611 {
1612 /* Update the scrollbar state and set action flags according to
1613 * what has to be done graphics wise. */
1614
1615 SCROLLBAR_INFO *infoPtr;
1616 UINT new_flags;
1617 INT action = 0;
1618
1619 /* handle invalid data structure */
1620 if (!SCROLL_ScrollInfoValid(info)
1621 || !(infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, TRUE)))
1622 return 0;
1623
1624 if (TRACE_ON(scroll))
1625 {
1626 TRACE("hwnd=%p bar=%d", hwnd, nBar);
1627 if (info->fMask & SIF_PAGE) TRACE( " page=%d", info->nPage );
1628 if (info->fMask & SIF_POS) TRACE( " pos=%d", info->nPos );
1629 if (info->fMask & SIF_RANGE) TRACE( " min=%d max=%d", info->nMin, info->nMax );
1630 TRACE("\n");
1631 }
1632
1633 /* Set the page size */
1634
1635 if (info->fMask & SIF_PAGE)
1636 {
1637 if( infoPtr->page != info->nPage )
1638 {
1639 infoPtr->page = info->nPage;
1640 action |= SA_SSI_REFRESH;
1641 }
1642 }
1643
1644 /* Set the scroll pos */
1645
1646 if (info->fMask & SIF_POS)
1647 {
1648 if( infoPtr->curVal != info->nPos )
1649 {
1650 infoPtr->curVal = info->nPos;
1651 action |= SA_SSI_REFRESH;
1652 }
1653 }
1654
1655 /* Set the scroll range */
1656
1657 if (info->fMask & SIF_RANGE)
1658 {
1659 /* Invalid range -> range is set to (0,0) */
1660 if ((info->nMin > info->nMax) ||
1661 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1662 {
1663 action |= SA_SSI_REFRESH;
1664 infoPtr->minVal = 0;
1665 infoPtr->maxVal = 0;
1666 }
1667 else
1668 {
1669 if( infoPtr->minVal != info->nMin ||
1670 infoPtr->maxVal != info->nMax )
1671 {
1672 action |= SA_SSI_REFRESH;
1673 infoPtr->minVal = info->nMin;
1674 infoPtr->maxVal = info->nMax;
1675 }
1676 }
1677 }
1678
1679 /* Make sure the page size is valid */
1680 if (infoPtr->page < 0) infoPtr->page = 0;
1681 else if (infoPtr->page > infoPtr->maxVal - infoPtr->minVal + 1 )
1682 infoPtr->page = infoPtr->maxVal - infoPtr->minVal + 1;
1683
1684 /* Make sure the pos is inside the range */
1685
1686 if (infoPtr->curVal < infoPtr->minVal)
1687 infoPtr->curVal = infoPtr->minVal;
1688 else if (infoPtr->curVal > infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1689 infoPtr->curVal = infoPtr->maxVal - max( infoPtr->page-1, 0 );
1690
1691 TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1692 infoPtr->page, infoPtr->curVal,
1693 infoPtr->minVal, infoPtr->maxVal );
1694
1695 /* don't change the scrollbar state if SetScrollInfo
1696 * is just called with SIF_DISABLENOSCROLL
1697 */
1698 if(!(info->fMask & SIF_ALL)) goto done;
1699
1700 /* Check if the scrollbar should be hidden or disabled */
1701
1702 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1703 {
1704 new_flags = infoPtr->flags;
1705 if (infoPtr->minVal >= infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1706 {
1707 /* Hide or disable scroll-bar */
1708 if (info->fMask & SIF_DISABLENOSCROLL)
1709 {
1710 new_flags = ESB_DISABLE_BOTH;
1711 action |= SA_SSI_REFRESH;
1712 }
1713 else if ((nBar != SB_CTL) && (action & SA_SSI_REFRESH))
1714 {
1715 action = SA_SSI_HIDE;
1716 }
1717 }
1718 else /* Show and enable scroll-bar only if no page only changed. */
1719 if (info->fMask != SIF_PAGE)
1720 {
1721 new_flags = ESB_ENABLE_BOTH;
1722 if ((nBar != SB_CTL) && ( (action & SA_SSI_REFRESH) ))
1723 action |= SA_SSI_SHOW;
1724 }
1725
1726 if (infoPtr->flags != new_flags) /* check arrow flags */
1727 {
1728 infoPtr->flags = new_flags;
1729 action |= SA_SSI_REPAINT_ARROWS;
1730 }
1731 }
1732
1733 done:
1734 if( action & SA_SSI_HIDE )
1735 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1736 else
1737 {
1738 if( action & SA_SSI_SHOW )
1739 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1740 return infoPtr->curVal; /* SetWindowPos() already did the painting */
1741
1742 if( bRedraw )
1743 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1744 else if( action & SA_SSI_REPAINT_ARROWS )
1745 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1746 }
1747
1748 /* Return current position */
1749 return infoPtr->curVal;
1750 }
1751
1752
1753 /*************************************************************************
1754 * GetScrollInfo (USER32.@)
1755 *
1756 * GetScrollInfo can be used to retrieve the position, upper bound,
1757 * lower bound, and page size of a scrollbar control.
1758 *
1759 * PARAMS
1760 * hwnd [I] Handle of window with scrollbar(s)
1761 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1762 * info [IO] fMask specifies which values to retrieve
1763 *
1764 * RETURNS
1765 * TRUE if SCROLLINFO is filled
1766 * ( if nBar is SB_CTL, GetScrollInfo returns TRUE even if nothing
1767 * is filled)
1768 */
1769 BOOL WINAPI GetScrollInfo(HWND hwnd, INT nBar, LPSCROLLINFO info)
1770 {
1771 TRACE("hwnd=%p nBar=%d info=%p\n", hwnd, nBar, info);
1772
1773 /* Refer SB_CTL requests to the window */
1774 if (nBar == SB_CTL)
1775 {
1776 SendMessageW(hwnd, SBM_GETSCROLLINFO, 0, (LPARAM)info);
1777 return TRUE;
1778 }
1779 return SCROLL_GetScrollInfo(hwnd, nBar, info);
1780 }
1781
1782
1783 /*************************************************************************
1784 * GetScrollBarInfo (USER32.@)
1785 *
1786 * GetScrollBarInfo can be used to retrieve information about a scrollbar
1787 * control.
1788 *
1789 * PARAMS
1790 * hwnd [I] Handle of window with scrollbar(s)
1791 * idObject [I] One of OBJID_CLIENT, OBJID_HSCROLL, or OBJID_VSCROLL
1792 * info [IO] cbSize specifies the size of SCROLLBARINFO
1793 *
1794 * RETURNS
1795 * TRUE if success
1796 */
1797 BOOL WINAPI GetScrollBarInfo(HWND hwnd, LONG idObject, LPSCROLLBARINFO info)
1798 {
1799 TRACE("hwnd=%p idObject=%d info=%p\n", hwnd, idObject, info);
1800
1801 /* Refer OBJID_CLIENT requests to the window */
1802 if (idObject == OBJID_CLIENT)
1803 return SendMessageW(hwnd, SBM_GETSCROLLBARINFO, 0, (LPARAM)info);
1804 else
1805 return SCROLL_GetScrollBarInfo(hwnd, idObject, info);
1806 }
1807
1808
1809 /*************************************************************************
1810 * SetScrollPos (USER32.@)
1811 *
1812 * Sets the current position of the scroll thumb.
1813 *
1814 * PARAMS
1815 * hwnd [I] Handle of window with scrollbar(s)
1816 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1817 * nPos [I] New value
1818 * bRedraw [I] Should scrollbar be redrawn afterwards?
1819 *
1820 * RETURNS
1821 * Success: Scrollbar position
1822 * Failure: 0
1823 *
1824 * REMARKS
1825 * Note the ambiguity when 0 is returned. Use GetLastError
1826 * to make sure there was an error (and to know which one).
1827 */
1828 INT WINAPI SetScrollPos( HWND hwnd, INT nBar, INT nPos, BOOL bRedraw)
1829 {
1830 SCROLLINFO info;
1831 SCROLLBAR_INFO *infoPtr;
1832 INT oldPos;
1833
1834 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, FALSE ))) return 0;
1835 oldPos = infoPtr->curVal;
1836 info.cbSize = sizeof(info);
1837 info.nPos = nPos;
1838 info.fMask = SIF_POS;
1839 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1840 return oldPos;
1841 }
1842
1843
1844 /*************************************************************************
1845 * GetScrollPos (USER32.@)
1846 *
1847 * Gets the current position of the scroll thumb.
1848 *
1849 * PARAMS
1850 * hwnd [I] Handle of window with scrollbar(s)
1851 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1852 *
1853 * RETURNS
1854 * Success: Current position
1855 * Failure: 0
1856 *
1857 * REMARKS
1858 * There is ambiguity when 0 is returned. Use GetLastError
1859 * to make sure there was an error (and to know which one).
1860 */
1861 INT WINAPI GetScrollPos(HWND hwnd, INT nBar)
1862 {
1863 TRACE("hwnd=%p nBar=%d\n", hwnd, nBar);
1864
1865 /* Refer SB_CTL requests to the window */
1866 if (nBar == SB_CTL)
1867 return SendMessageW(hwnd, SBM_GETPOS, 0, 0);
1868 else
1869 return SCROLL_GetScrollPos(hwnd, nBar);
1870 }
1871
1872
1873 /*************************************************************************
1874 * SetScrollRange (USER32.@)
1875 * The SetScrollRange function sets the minimum and maximum scroll box positions
1876 * If nMinPos and nMaxPos is the same value, the scroll bar will hide
1877 *
1878 * Sets the range of the scroll bar.
1879 *
1880 * PARAMS
1881 * hwnd [I] Handle of window with scrollbar(s)
1882 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1883 * minVal [I] New minimum value
1884 * maxVal [I] New Maximum value
1885 * bRedraw [I] Should scrollbar be redrawn afterwards?
1886 *
1887 * RETURNS
1888 * Success: TRUE
1889 * Failure: FALSE
1890 */
1891 BOOL WINAPI SetScrollRange(HWND hwnd, INT nBar, INT minVal, INT maxVal, BOOL bRedraw)
1892 {
1893 SCROLLINFO info;
1894
1895 TRACE("hwnd=%p nBar=%d min=%d max=%d, bRedraw=%d\n", hwnd, nBar, minVal, maxVal, bRedraw);
1896
1897 info.cbSize = sizeof(info);
1898 info.fMask = SIF_RANGE;
1899 info.nMin = minVal;
1900 info.nMax = maxVal;
1901 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1902 return TRUE;
1903 }
1904
1905
1906 /*************************************************************************
1907 * SCROLL_SetNCSbState
1908 *
1909 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1910 */
1911 INT SCROLL_SetNCSbState(HWND hwnd, int vMin, int vMax, int vPos,
1912 int hMin, int hMax, int hPos)
1913 {
1914 SCROLLINFO vInfo, hInfo;
1915
1916 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1917 vInfo.nMin = vMin;
1918 vInfo.nMax = vMax;
1919 vInfo.nPos = vPos;
1920 hInfo.nMin = hMin;
1921 hInfo.nMax = hMax;
1922 hInfo.nPos = hPos;
1923 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1924
1925 SCROLL_SetScrollInfo( hwnd, SB_VERT, &vInfo, TRUE );
1926 SCROLL_SetScrollInfo( hwnd, SB_HORZ, &hInfo, TRUE );
1927
1928 return 0;
1929 }
1930
1931
1932 /*************************************************************************
1933 * GetScrollRange (USER32.@)
1934 *
1935 * Gets the range of the scroll bar.
1936 *
1937 * PARAMS
1938 * hwnd [I] Handle of window with scrollbar(s)
1939 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1940 * lpMin [O] Where to store minimum value
1941 * lpMax [O] Where to store maximum value
1942 *
1943 * RETURNS
1944 * TRUE if values is filled
1945 */
1946 BOOL WINAPI GetScrollRange(HWND hwnd, INT nBar, LPINT lpMin, LPINT lpMax)
1947 {
1948 TRACE("hwnd=%p nBar=%d lpMin=%p lpMax=%p\n", hwnd, nBar, lpMin, lpMax);
1949
1950 /* Refer SB_CTL requests to the window */
1951 if (nBar == SB_CTL)
1952 SendMessageW(hwnd, SBM_GETRANGE, (WPARAM)lpMin, (LPARAM)lpMax);
1953 else
1954 SCROLL_GetScrollRange(hwnd, nBar, lpMin, lpMax);
1955
1956 return TRUE;
1957 }
1958
1959
1960 /*************************************************************************
1961 * SCROLL_ShowScrollBar()
1962 *
1963 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1964 */
1965 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar, BOOL fShowH, BOOL fShowV )
1966 {
1967 ULONG old_style, set_bits = 0, clear_bits = 0;
1968
1969 TRACE("hwnd=%p bar=%d horz=%d, vert=%d\n", hwnd, nBar, fShowH, fShowV );
1970
1971 switch(nBar)
1972 {
1973 case SB_CTL:
1974 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1975 return TRUE;
1976
1977 case SB_BOTH:
1978 case SB_HORZ:
1979 if (fShowH) set_bits |= WS_HSCROLL;
1980 else clear_bits |= WS_HSCROLL;
1981 if( nBar == SB_HORZ ) break;
1982 /* fall through */
1983 case SB_VERT:
1984 if (fShowV) set_bits |= WS_VSCROLL;
1985 else clear_bits |= WS_VSCROLL;
1986 break;
1987
1988 default:
1989 return FALSE; /* Nothing to do! */
1990 }
1991
1992 old_style = WIN_SetStyle( hwnd, set_bits, clear_bits );
1993 if ((old_style & clear_bits) != 0 || (old_style & set_bits) != set_bits)
1994 {
1995 /* frame has been changed, let the window redraw itself */
1996 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1997 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1998 return TRUE;
1999 }
2000 return FALSE; /* no frame changes */
2001 }
2002
2003
2004 /*************************************************************************
2005 * ShowScrollBar (USER32.@)
2006 *
2007 * Shows or hides the scroll bar.
2008 *
2009 * PARAMS
2010 * hwnd [I] Handle of window with scrollbar(s)
2011 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
2012 * fShow [I] TRUE = show, FALSE = hide
2013 *
2014 * RETURNS
2015 * Success: TRUE
2016 * Failure: FALSE
2017 */
2018 BOOL WINAPI ShowScrollBar(HWND hwnd, INT nBar, BOOL fShow)
2019 {
2020 if ( !hwnd )
2021 return FALSE;
2022
2023 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
2024 (nBar == SB_HORZ) ? 0 : fShow );
2025 return TRUE;
2026 }
2027
2028
2029 /*************************************************************************
2030 * EnableScrollBar (USER32.@)
2031 *
2032 * Enables or disables the scroll bars.
2033 */
2034 BOOL WINAPI EnableScrollBar( HWND hwnd, UINT nBar, UINT flags )
2035 {
2036 BOOL bFineWithMe;
2037 SCROLLBAR_INFO *infoPtr;
2038
2039 flags &= ESB_DISABLE_BOTH;
2040
2041 if (nBar == SB_BOTH)
2042 {
2043 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, SB_VERT, TRUE ))) return FALSE;
2044 if (!(bFineWithMe = (infoPtr->flags == flags)) )
2045 {
2046 infoPtr->flags = flags;
2047 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
2048 }
2049 nBar = SB_HORZ;
2050 }
2051 else
2052 bFineWithMe = TRUE;
2053
2054 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, TRUE ))) return FALSE;
2055 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
2056 infoPtr->flags = flags;
2057
2058 if (nBar == SB_CTL && (flags == ESB_DISABLE_BOTH || flags == ESB_ENABLE_BOTH))
2059 EnableWindow(hwnd, flags == ESB_ENABLE_BOTH);
2060
2061 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
2062 return TRUE;
2063 }
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