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[wine/hacks.git] / dlls / user32 / scroll.c
blob6c346529aea23d8385242f8504bc268e25d3cef6
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
321 if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
322 return infoPtr->minVal;
323
324 if (infoPtr->page)
325 {
326 thumbSize = MulDiv(pixels,infoPtr->page,(infoPtr->maxVal-infoPtr->minVal+1));
327 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
328 }
329 else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
330
331 if ((pixels -= thumbSize) <= 0) return infoPtr->minVal;
332
333 pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
334 if (pos > pixels) pos = pixels;
335
336 if (!infoPtr->page) pos *= infoPtr->maxVal - infoPtr->minVal;
337 else pos *= infoPtr->maxVal - infoPtr->minVal - infoPtr->page + 1;
338 return infoPtr->minVal + ((pos + pixels / 2) / pixels);
339 }
340
341 /***********************************************************************
342 * SCROLL_PtInRectEx
343 */
344 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
345 {
346 RECT rect = *lpRect;
347 int scrollbarWidth;
348
349 /* Pad hit rect to allow mouse to be dragged outside of scrollbar and
350 * still be considered in the scrollbar. */
351 if (vertical)
352 {
353 scrollbarWidth = lpRect->right - lpRect->left;
354 rect.left -= scrollbarWidth*8;
355 rect.right += scrollbarWidth*8;
356 rect.top -= scrollbarWidth*2;
357 rect.bottom += scrollbarWidth*2;
358 }
359 else
360 {
361 scrollbarWidth = lpRect->bottom - lpRect->top;
362 rect.left -= scrollbarWidth*2;
363 rect.right += scrollbarWidth*2;
364 rect.top -= scrollbarWidth*8;
365 rect.bottom += scrollbarWidth*8;
366 }
367 return PtInRect( &rect, pt );
368 }
369
370 /***********************************************************************
371 * SCROLL_ClipPos
372 */
373 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
374 {
375 if( pt.x < lpRect->left )
376 pt.x = lpRect->left;
377 else
378 if( pt.x > lpRect->right )
379 pt.x = lpRect->right;
380
381 if( pt.y < lpRect->top )
382 pt.y = lpRect->top;
383 else
384 if( pt.y > lpRect->bottom )
385 pt.y = lpRect->bottom;
386
387 return pt;
388 }
389
390
391 /***********************************************************************
392 * SCROLL_HitTest
393 *
394 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
395 */
396 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
397 POINT pt, BOOL bDragging )
398 {
399 INT arrowSize, thumbSize, thumbPos;
400 RECT rect;
401
402 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
403 &arrowSize, &thumbSize, &thumbPos );
404
405 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
406 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
407
408 if (vertical)
409 {
410 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
411 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
412 if (!thumbPos) return SCROLL_TOP_RECT;
413 pt.y -= rect.top;
414 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
415 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
416 }
417 else /* horizontal */
418 {
419 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
420 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
421 if (!thumbPos) return SCROLL_TOP_RECT;
422 pt.x -= rect.left;
423 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
424 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
425 }
426 return SCROLL_THUMB;
427 }
428
429
430 /***********************************************************************
431 * SCROLL_DrawArrows
432 *
433 * Draw the scroll bar arrows.
434 */
435 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
436 RECT *rect, INT arrowSize, BOOL vertical,
437 BOOL top_pressed, BOOL bottom_pressed )
438 {
439 RECT r;
440
441 r = *rect;
442 if( vertical )
443 r.bottom = r.top + arrowSize;
444 else
445 r.right = r.left + arrowSize;
446
447 DrawFrameControl( hdc, &r, DFC_SCROLL,
448 (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
449 | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
450 | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
451
452 r = *rect;
453 if( vertical )
454 r.top = r.bottom-arrowSize;
455 else
456 r.left = r.right-arrowSize;
457
458 DrawFrameControl( hdc, &r, DFC_SCROLL,
459 (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
460 | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
461 | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
462 }
463
464 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
465 INT arrowSize, INT thumbSize )
466 {
467 INT pos = SCROLL_TrackingPos;
468 INT max_size;
469
470 if( vertical )
471 max_size = rect->bottom - rect->top;
472 else
473 max_size = rect->right - rect->left;
474
475 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
476
477 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
478 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
479 else if( pos > max_size )
480 pos = max_size;
481
482 SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
483 rect, arrowSize, thumbSize, pos,
484 0, vertical, FALSE, FALSE );
485
486 SCROLL_MovingThumb = !SCROLL_MovingThumb;
487 }
488
489 /***********************************************************************
490 * SCROLL_DrawInterior
491 *
492 * Draw the scroll bar interior (everything except the arrows).
493 */
494 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
495 RECT *rect, INT arrowSize,
496 INT thumbSize, INT thumbPos,
497 UINT flags, BOOL vertical,
498 BOOL top_selected, BOOL bottom_selected )
499 {
500 RECT r;
501 HPEN hSavePen;
502 HBRUSH hSaveBrush,hBrush;
503
504 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
505 * The window-owned scrollbars need to call DEFWND_ControlColor
506 * to correctly setup default scrollbar colors
507 */
508 if (nBar == SB_CTL)
509 {
510 hBrush = (HBRUSH)SendMessageW( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
511 (WPARAM)hdc,(LPARAM)hwnd);
512 }
513 else
514 {
515 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
516 }
517
518 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
519 hSaveBrush = SelectObject( hdc, hBrush );
520
521 /* Calculate the scroll rectangle */
522 r = *rect;
523 if (vertical)
524 {
525 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
526 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
527 }
528 else
529 {
530 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
531 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
532 }
533
534 /* Draw the scroll rectangles and thumb */
535 if (!thumbPos) /* No thumb to draw */
536 {
537 PatBlt( hdc, r.left, r.top,
538 r.right - r.left, r.bottom - r.top,
539 PATCOPY );
540
541 /* cleanup and return */
542 SelectObject( hdc, hSavePen );
543 SelectObject( hdc, hSaveBrush );
544 return;
545 }
546
547 if (vertical)
548 {
549 PatBlt( hdc, r.left, r.top,
550 r.right - r.left,
551 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
552 top_selected ? 0x0f0000 : PATCOPY );
553 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
554 PatBlt( hdc, r.left, r.top + thumbSize,
555 r.right - r.left,
556 r.bottom - r.top - thumbSize,
557 bottom_selected ? 0x0f0000 : PATCOPY );
558 r.bottom = r.top + thumbSize;
559 }
560 else /* horizontal */
561 {
562 PatBlt( hdc, r.left, r.top,
563 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
564 r.bottom - r.top,
565 top_selected ? 0x0f0000 : PATCOPY );
566 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
567 PatBlt( hdc, r.left + thumbSize, r.top,
568 r.right - r.left - thumbSize,
569 r.bottom - r.top,
570 bottom_selected ? 0x0f0000 : PATCOPY );
571 r.right = r.left + thumbSize;
572 }
573
574 /* Draw the thumb */
575 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
576
577 /* cleanup */
578 SelectObject( hdc, hSavePen );
579 SelectObject( hdc, hSaveBrush );
580 }
581
582
583 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
584 RECT *rect, INT arrowSize,
585 INT thumbSize, INT thumbPos,
586 UINT flags, BOOL vertical,
587 BOOL top_selected, BOOL bottom_selected )
588 {
589 RECT r;
590 HPEN hSavePen;
591 HBRUSH hSaveBrush,hBrush;
592 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
593
594 if (Save_SCROLL_MovingThumb &&
595 (SCROLL_TrackingWin == hwnd) &&
596 (SCROLL_TrackingBar == nBar))
597 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
598
599 /* Select the correct brush and pen */
600
601 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
602 * The window-owned scrollbars need to call DEFWND_ControlColor
603 * to correctly setup default scrollbar colors
604 */
605 if (nBar == SB_CTL) {
606 hBrush = (HBRUSH)SendMessageW( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
607 (WPARAM)hdc,(LPARAM)hwnd);
608 } else {
609 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
610 }
611 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
612 hSaveBrush = SelectObject( hdc, hBrush );
613
614 /* Calculate the scroll rectangle */
615
616 r = *rect;
617 if (vertical)
618 {
619 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
620 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
621 }
622 else
623 {
624 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
625 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
626 }
627
628 /* Draw the scroll bar frame */
629
630 /* Draw the scroll rectangles and thumb */
631
632 if (!thumbPos) /* No thumb to draw */
633 {
634 PatBlt( hdc, r.left, r.top, r.right - r.left, r.bottom - r.top, PATCOPY );
635
636 /* cleanup and return */
637 SelectObject( hdc, hSavePen );
638 SelectObject( hdc, hSaveBrush );
639 return;
640 }
641
642 if (vertical)
643 {
644 PatBlt( hdc, r.left, r.top, r.right - r.left,
645 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
646 top_selected ? 0x0f0000 : PATCOPY );
647 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
648 PatBlt( hdc, r.left, r.top + thumbSize, r.right - r.left,
649 r.bottom - r.top - thumbSize,
650 bottom_selected ? 0x0f0000 : PATCOPY );
651 r.bottom = r.top + thumbSize;
652 }
653 else /* horizontal */
654 {
655 PatBlt( hdc, r.left, r.top,
656 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
657 r.bottom - r.top, top_selected ? 0x0f0000 : PATCOPY );
658 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
659 PatBlt( hdc, r.left + thumbSize, r.top, r.right - r.left - thumbSize,
660 r.bottom - r.top, bottom_selected ? 0x0f0000 : PATCOPY );
661 r.right = r.left + thumbSize;
662 }
663
664 /* Draw the thumb */
665
666 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
667 Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
668 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
669
670 if (Save_SCROLL_MovingThumb &&
671 (SCROLL_TrackingWin == hwnd) &&
672 (SCROLL_TrackingBar == nBar))
673 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
674
675 /* cleanup */
676 SelectObject( hdc, hSavePen );
677 SelectObject( hdc, hSaveBrush );
678 }
679
680
681 /***********************************************************************
682 * SCROLL_DrawScrollBar
683 *
684 * Redraw the whole scrollbar.
685 */
686 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
687 BOOL arrows, BOOL interior )
688 {
689 INT arrowSize, thumbSize, thumbPos;
690 RECT rect;
691 BOOL vertical;
692 SCROLLBAR_INFO *infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, TRUE );
693 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
694 DWORD style = GetWindowLongW( hwnd, GWL_STYLE );
695
696 if (!(hwnd = WIN_GetFullHandle( hwnd ))) return;
697
698 if (!infoPtr ||
699 ((nBar == SB_VERT) && !(style & WS_VSCROLL)) ||
700 ((nBar == SB_HORZ) && !(style & WS_HSCROLL))) return;
701 if (!WIN_IsWindowDrawable( hwnd, FALSE )) return;
702
703 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
704 &arrowSize, &thumbSize, &thumbPos );
705
706 /* do not draw if the scrollbar rectangle is empty */
707 if(IsRectEmpty(&rect)) return;
708
709 if (Save_SCROLL_MovingThumb &&
710 (SCROLL_TrackingWin == hwnd) &&
711 (SCROLL_TrackingBar == nBar))
712 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
713
714 /* Draw the arrows */
715
716 if (arrows && arrowSize)
717 {
718 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
719 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
720 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
721 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
722 else
723 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
724 FALSE, FALSE );
725 }
726 if( interior )
727 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
728 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
729
730 if (Save_SCROLL_MovingThumb &&
731 (SCROLL_TrackingWin == hwnd) &&
732 (SCROLL_TrackingBar == nBar))
733 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
734
735 /* if scroll bar has focus, reposition the caret */
736 if(hwnd==GetFocus() && (nBar==SB_CTL))
737 {
738 if (!vertical)
739 {
740 SetCaretPos(thumbPos+1, rect.top+1);
741 }
742 else
743 {
744 SetCaretPos(rect.top+1, thumbPos+1);
745 }
746 }
747 }
748
749 /***********************************************************************
750 * SCROLL_DrawSizeGrip
751 *
752 * Draw the size grip.
753 */
754 static void SCROLL_DrawSizeGrip( HWND hwnd, HDC hdc)
755 {
756 RECT rc;
757
758 GetClientRect( hwnd, &rc );
759 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
760 rc.left = max( rc.left, rc.right - GetSystemMetrics(SM_CXVSCROLL) - 1 );
761 rc.top = max( rc.top, rc.bottom - GetSystemMetrics(SM_CYHSCROLL) - 1 );
762 DrawFrameControl( hdc, &rc, DFC_SCROLL, DFCS_SCROLLSIZEGRIP );
763 }
764
765
766 /***********************************************************************
767 * SCROLL_RefreshScrollBar
768 *
769 * Repaint the scroll bar interior after a SetScrollRange() or
770 * SetScrollPos() call.
771 */
772 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
773 BOOL arrows, BOOL interior )
774 {
775 HDC hdc = GetDCEx( hwnd, 0,
776 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
777 if (!hdc) return;
778
779 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
780 ReleaseDC( hwnd, hdc );
781 }
782
783
784 /***********************************************************************
785 * SCROLL_HandleKbdEvent
786 *
787 * Handle a keyboard event (only for SB_CTL scrollbars with focus).
788 *
789 * PARAMS
790 * hwnd [I] Handle of window with scrollbar(s)
791 * wParam [I] Variable input including enable state
792 * lParam [I] Variable input including input point
793 */
794 static void SCROLL_HandleKbdEvent(HWND hwnd, WPARAM wParam, LPARAM lParam)
795 {
796 TRACE("hwnd=%p wParam=%ld lParam=%ld\n", hwnd, wParam, lParam);
797
798 /* hide caret on first KEYDOWN to prevent flicker */
799 if ((lParam & PFD_DOUBLEBUFFER_DONTCARE) == 0)
800 HideCaret(hwnd);
801
802 switch(wParam)
803 {
804 case VK_PRIOR: wParam = SB_PAGEUP; break;
805 case VK_NEXT: wParam = SB_PAGEDOWN; break;
806 case VK_HOME: wParam = SB_TOP; break;
807 case VK_END: wParam = SB_BOTTOM; break;
808 case VK_UP: wParam = SB_LINEUP; break;
809 case VK_DOWN: wParam = SB_LINEDOWN; break;
810 case VK_LEFT: wParam = SB_LINEUP; break;
811 case VK_RIGHT: wParam = SB_LINEDOWN; break;
812 default: return;
813 }
814 SendMessageW(GetParent(hwnd),
815 ((GetWindowLongW( hwnd, GWL_STYLE ) & SBS_VERT) ?
816 WM_VSCROLL : WM_HSCROLL), wParam, (LPARAM)hwnd);
817 }
818
819
820 /***********************************************************************
821 * SCROLL_HandleScrollEvent
822 *
823 * Handle a mouse or timer event for the scrollbar.
824 * 'pt' is the location of the mouse event in client (for SB_CTL) or
825 * windows coordinates.
826 */
827 static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
828 {
829 /* Previous mouse position for timer events */
830 static POINT prevPt;
831 /* Thumb position when tracking started. */
832 static UINT trackThumbPos;
833 /* Position in the scroll-bar of the last button-down event. */
834 static INT lastClickPos;
835 /* Position in the scroll-bar of the last mouse event. */
836 static INT lastMousePos;
837
838 enum SCROLL_HITTEST hittest;
839 HWND hwndOwner, hwndCtl;
840 BOOL vertical;
841 INT arrowSize, thumbSize, thumbPos;
842 RECT rect;
843 HDC hdc;
844
845 SCROLLBAR_INFO *infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, FALSE );
846 if (!infoPtr) return;
847 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
848 return;
849
850 if (nBar == SB_CTL && (GetWindowLongW( hwnd, GWL_STYLE ) & (SBS_SIZEGRIP | SBS_SIZEBOX)))
851 {
852 switch(msg)
853 {
854 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
855 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
856 SetCapture( hwnd );
857 prevPt = pt;
858 SCROLL_trackHitTest = hittest = SCROLL_THUMB;
859 break;
860 case WM_MOUSEMOVE:
861 GetClientRect(GetParent(GetParent(hwnd)),&rect);
862 prevPt = pt;
863 break;
864 case WM_LBUTTONUP:
865 ReleaseCapture();
866 SCROLL_trackHitTest = hittest = SCROLL_NOWHERE;
867 if (hwnd==GetFocus()) ShowCaret(hwnd);
868 break;
869 case WM_SYSTIMER:
870 pt = prevPt;
871 break;
872 }
873 return;
874 }
875
876 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
877 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
878 &arrowSize, &thumbSize, &thumbPos );
879 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
880 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
881
882 switch(msg)
883 {
884 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
885 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
886 SCROLL_trackVertical = vertical;
887 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
888 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
889 lastMousePos = lastClickPos;
890 trackThumbPos = thumbPos;
891 prevPt = pt;
892 if (nBar == SB_CTL && (GetWindowLongW(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
893 SetCapture( hwnd );
894 break;
895
896 case WM_MOUSEMOVE:
897 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
898 prevPt = pt;
899 break;
900
901 case WM_LBUTTONUP:
902 hittest = SCROLL_NOWHERE;
903 ReleaseCapture();
904 /* if scrollbar has focus, show back caret */
905 if (hwnd==GetFocus()) ShowCaret(hwnd);
906 break;
907
908 case WM_SYSTIMER:
909 pt = prevPt;
910 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
911 break;
912
913 default:
914 return; /* Should never happen */
915 }
916
917 TRACE("Event: hwnd=%p bar=%d msg=%s pt=%d,%d hit=%d\n",
918 hwnd, nBar, SPY_GetMsgName(msg,hwnd), pt.x, pt.y, hittest );
919
920 switch(SCROLL_trackHitTest)
921 {
922 case SCROLL_NOWHERE: /* No tracking in progress */
923 break;
924
925 case SCROLL_TOP_ARROW:
926 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
927 (hittest == SCROLL_trackHitTest), FALSE );
928 if (hittest == SCROLL_trackHitTest)
929 {
930 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
931 {
932 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
933 SB_LINEUP, (LPARAM)hwndCtl );
934 }
935
936 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
937 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, NULL );
938 }
939 else KillSystemTimer( hwnd, SCROLL_TIMER );
940 break;
941
942 case SCROLL_TOP_RECT:
943 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
944 thumbPos, infoPtr->flags, vertical,
945 (hittest == SCROLL_trackHitTest), FALSE );
946 if (hittest == SCROLL_trackHitTest)
947 {
948 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
949 {
950 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
951 SB_PAGEUP, (LPARAM)hwndCtl );
952 }
953 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
954 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, NULL );
955 }
956 else KillSystemTimer( hwnd, SCROLL_TIMER );
957 break;
958
959 case SCROLL_THUMB:
960 if (msg == WM_LBUTTONDOWN)
961 {
962 SCROLL_TrackingWin = hwnd;
963 SCROLL_TrackingBar = nBar;
964 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
965 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
966 vertical,
967 SCROLL_TrackingPos );
968 if (!SCROLL_MovingThumb)
969 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
970 }
971 else if (msg == WM_LBUTTONUP)
972 {
973 if (SCROLL_MovingThumb)
974 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
975
976 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
977 thumbPos, infoPtr->flags, vertical,
978 FALSE, FALSE );
979 }
980 else /* WM_MOUSEMOVE */
981 {
982 INT pos;
983
984 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
985 else
986 {
987 pt = SCROLL_ClipPos( &rect, pt );
988 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
989 }
990 if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
991 {
992 if (SCROLL_MovingThumb)
993 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
994 arrowSize, thumbSize );
995 lastMousePos = pos;
996 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
997 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
998 vertical,
999 SCROLL_TrackingPos );
1000 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1001 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1002 (LPARAM)hwndCtl );
1003 if (!SCROLL_MovingThumb)
1004 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1005 arrowSize, thumbSize );
1006 }
1007 }
1008 break;
1009
1010 case SCROLL_BOTTOM_RECT:
1011 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1012 thumbPos, infoPtr->flags, vertical,
1013 FALSE, (hittest == SCROLL_trackHitTest) );
1014 if (hittest == SCROLL_trackHitTest)
1015 {
1016 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1017 {
1018 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1019 SB_PAGEDOWN, (LPARAM)hwndCtl );
1020 }
1021 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1022 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, NULL );
1023 }
1024 else KillSystemTimer( hwnd, SCROLL_TIMER );
1025 break;
1026
1027 case SCROLL_BOTTOM_ARROW:
1028 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1029 FALSE, (hittest == SCROLL_trackHitTest) );
1030 if (hittest == SCROLL_trackHitTest)
1031 {
1032 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1033 {
1034 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1035 SB_LINEDOWN, (LPARAM)hwndCtl );
1036 }
1037
1038 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1039 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, NULL );
1040 }
1041 else KillSystemTimer( hwnd, SCROLL_TIMER );
1042 break;
1043 }
1044
1045 if (msg == WM_LBUTTONDOWN)
1046 {
1047
1048 if (hittest == SCROLL_THUMB)
1049 {
1050 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1051 trackThumbPos + lastMousePos - lastClickPos );
1052 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1053 MAKEWPARAM( SB_THUMBTRACK, val ), (LPARAM)hwndCtl );
1054 }
1055 }
1056
1057 if (msg == WM_LBUTTONUP)
1058 {
1059 hittest = SCROLL_trackHitTest;
1060 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1061
1062 if (hittest == SCROLL_THUMB)
1063 {
1064 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1065 trackThumbPos + lastMousePos - lastClickPos );
1066 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1067 MAKEWPARAM( SB_THUMBPOSITION, val ), (LPARAM)hwndCtl );
1068 }
1069 /* SB_ENDSCROLL doesn't report thumb position */
1070 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1071 SB_ENDSCROLL, (LPARAM)hwndCtl );
1072
1073 /* Terminate tracking */
1074 SCROLL_TrackingWin = 0;
1075 }
1076
1077 ReleaseDC( hwnd, hdc );
1078 }
1079
1080
1081 /***********************************************************************
1082 * SCROLL_TrackScrollBar
1083 *
1084 * Track a mouse button press on a scroll-bar.
1085 * pt is in screen-coordinates for non-client scroll bars.
1086 */
1087 void SCROLL_TrackScrollBar( HWND hwnd, INT scrollbar, POINT pt )
1088 {
1089 MSG msg;
1090 INT xoffset = 0, yoffset = 0;
1091
1092 if (scrollbar != SB_CTL)
1093 {
1094 WND *wndPtr = WIN_GetPtr( hwnd );
1095 if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return;
1096 xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
1097 yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
1098 WIN_ReleasePtr( wndPtr );
1099 ScreenToClient( hwnd, &pt );
1100 pt.x += xoffset;
1101 pt.y += yoffset;
1102 }
1103
1104 SCROLL_HandleScrollEvent( hwnd, scrollbar, WM_LBUTTONDOWN, pt );
1105
1106 do
1107 {
1108 if (!GetMessageW( &msg, 0, 0, 0 )) break;
1109 if (CallMsgFilterW( &msg, MSGF_SCROLLBAR )) continue;
1110 if (msg.message == WM_LBUTTONUP ||
1111 msg.message == WM_MOUSEMOVE ||
1112 (msg.message == WM_SYSTIMER && msg.wParam == SCROLL_TIMER))
1113 {
1114 pt.x = (short)LOWORD(msg.lParam) + xoffset;
1115 pt.y = (short)HIWORD(msg.lParam) + yoffset;
1116 SCROLL_HandleScrollEvent( hwnd, scrollbar, msg.message, pt );
1117 }
1118 else
1119 {
1120 TranslateMessage( &msg );
1121 DispatchMessageW( &msg );
1122 }
1123 if (!IsWindow( hwnd ))
1124 {
1125 ReleaseCapture();
1126 break;
1127 }
1128 } while (msg.message != WM_LBUTTONUP);
1129 }
1130
1131
1132 /***********************************************************************
1133 * SCROLL_CreateScrollBar
1134 *
1135 * Create a scroll bar
1136 *
1137 * PARAMS
1138 * hwnd [I] Handle of window with scrollbar(s)
1139 * lpCreate [I] The style and place of the scroll bar
1140 */
1141 static void SCROLL_CreateScrollBar(HWND hwnd, LPCREATESTRUCTW lpCreate)
1142 {
1143 LPSCROLLBAR_INFO info = SCROLL_GetInternalInfo(hwnd, SB_CTL, TRUE);
1144 if (!info) return;
1145
1146 TRACE("hwnd=%p lpCreate=%p\n", hwnd, lpCreate);
1147
1148 if (lpCreate->style & WS_DISABLED)
1149 {
1150 info->flags = ESB_DISABLE_BOTH;
1151 TRACE("Created WS_DISABLED scrollbar\n");
1152 }
1153
1154
1155 if (lpCreate->style & (SBS_SIZEGRIP | SBS_SIZEBOX))
1156 {
1157 if (lpCreate->style & SBS_SIZEBOXTOPLEFTALIGN)
1158 MoveWindow( hwnd, lpCreate->x, lpCreate->y, GetSystemMetrics(SM_CXVSCROLL)+1,
1159 GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1160 else if(lpCreate->style & SBS_SIZEBOXBOTTOMRIGHTALIGN)
1161 MoveWindow( hwnd, lpCreate->x+lpCreate->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1162 lpCreate->y+lpCreate->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1163 GetSystemMetrics(SM_CXVSCROLL)+1,
1164 GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1165 }
1166 else if (lpCreate->style & SBS_VERT)
1167 {
1168 if (lpCreate->style & SBS_LEFTALIGN)
1169 MoveWindow( hwnd, lpCreate->x, lpCreate->y,
1170 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreate->cy, FALSE );
1171 else if (lpCreate->style & SBS_RIGHTALIGN)
1172 MoveWindow( hwnd,
1173 lpCreate->x+lpCreate->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1174 lpCreate->y,
1175 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreate->cy, FALSE );
1176 }
1177 else /* SBS_HORZ */
1178 {
1179 if (lpCreate->style & SBS_TOPALIGN)
1180 MoveWindow( hwnd, lpCreate->x, lpCreate->y,
1181 lpCreate->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1182 else if (lpCreate->style & SBS_BOTTOMALIGN)
1183 MoveWindow( hwnd,
1184 lpCreate->x,
1185 lpCreate->y+lpCreate->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1186 lpCreate->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1187 }
1188 }
1189
1190
1191 /*************************************************************************
1192 * SCROLL_GetScrollInfo
1193 *
1194 * Internal helper for the API function
1195 *
1196 * PARAMS
1197 * hwnd [I] Handle of window with scrollbar(s)
1198 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1199 * info [IO] fMask specifies which values to retrieve
1200 *
1201 * RETURNS
1202 * FALSE if requested field not filled (f.i. scroll bar does not exist)
1203 */
1204 static BOOL SCROLL_GetScrollInfo(HWND hwnd, INT nBar, LPSCROLLINFO info)
1205 {
1206 LPSCROLLBAR_INFO infoPtr;
1207
1208 /* handle invalid data structure */
1209 if (!SCROLL_ScrollInfoValid(info)
1210 || !(infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE)))
1211 return FALSE;
1212
1213 /* fill in the desired scroll info structure */
1214 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->page;
1215 if (info->fMask & SIF_POS) info->nPos = infoPtr->curVal;
1216 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1217 info->nTrackPos = (SCROLL_TrackingWin == WIN_GetFullHandle(hwnd)) ? SCROLL_TrackingVal : infoPtr->curVal;
1218 if (info->fMask & SIF_RANGE)
1219 {
1220 info->nMin = infoPtr->minVal;
1221 info->nMax = infoPtr->maxVal;
1222 }
1223
1224 TRACE("cbSize %02x fMask %04x nMin %d nMax %d nPage %u nPos %d nTrackPos %d\n",
1225 info->cbSize, info->fMask, info->nMin, info->nMax, info->nPage,
1226 info->nPos, info->nTrackPos);
1227
1228 return (info->fMask & SIF_ALL) != 0;
1229 }
1230
1231
1232 /*************************************************************************
1233 * SCROLL_GetScrollBarInfo
1234 *
1235 * Internal helper for the API function
1236 *
1237 * PARAMS
1238 * hwnd [I] Handle of window with scrollbar(s)
1239 * idObject [I] One of OBJID_CLIENT, OBJID_HSCROLL, or OBJID_VSCROLL
1240 * info [IO] cbSize specifies the size of the structure
1241 *
1242 * RETURNS
1243 * FALSE if failed
1244 */
1245 static BOOL SCROLL_GetScrollBarInfo(HWND hwnd, LONG idObject, LPSCROLLBARINFO info)
1246 {
1247 LPSCROLLBAR_INFO infoPtr;
1248 INT nBar;
1249 INT nDummy;
1250 DWORD style = GetWindowLongW(hwnd, GWL_STYLE);
1251 BOOL pressed;
1252 RECT rect;
1253
1254 switch (idObject)
1255 {
1256 case OBJID_CLIENT: nBar = SB_CTL; break;
1257 case OBJID_HSCROLL: nBar = SB_HORZ; break;
1258 case OBJID_VSCROLL: nBar = SB_VERT; break;
1259 default: return FALSE;
1260 }
1261
1262 /* handle invalid data structure */
1263 if (info->cbSize != sizeof(*info))
1264 return FALSE;
1265
1266 SCROLL_GetScrollBarRect(hwnd, nBar, &info->rcScrollBar, &nDummy,
1267 &info->dxyLineButton, &info->xyThumbTop);
1268 /* rcScrollBar needs to be in screen coordinates */
1269 GetWindowRect(hwnd, &rect);
1270 OffsetRect(&info->rcScrollBar, rect.left, rect.top);
1271
1272 info->xyThumbBottom = info->xyThumbTop + info->dxyLineButton;
1273
1274 infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, TRUE);
1275 if (!infoPtr)
1276 return FALSE;
1277
1278 /* Scroll bar state */
1279 info->rgstate[0] = 0;
1280 if ((nBar == SB_HORZ && !(style & WS_HSCROLL))
1281 || (nBar == SB_VERT && !(style & WS_VSCROLL)))
1282 info->rgstate[0] |= STATE_SYSTEM_INVISIBLE;
1283 if (infoPtr->minVal >= infoPtr->maxVal - max(infoPtr->page - 1, 0))
1284 {
1285 if (!(info->rgstate[0] & STATE_SYSTEM_INVISIBLE))
1286 info->rgstate[0] |= STATE_SYSTEM_UNAVAILABLE;
1287 else
1288 info->rgstate[0] |= STATE_SYSTEM_OFFSCREEN;
1289 }
1290 if (nBar == SB_CTL && !IsWindowEnabled(hwnd))
1291 info->rgstate[0] |= STATE_SYSTEM_UNAVAILABLE;
1292
1293 pressed = ((nBar == SB_VERT) == SCROLL_trackVertical && GetCapture() == hwnd);
1294
1295 /* Top/left arrow button state. MSDN says top/right, but I don't believe it */
1296 info->rgstate[1] = 0;
1297 if (pressed && SCROLL_trackHitTest == SCROLL_TOP_ARROW)
1298 info->rgstate[1] |= STATE_SYSTEM_PRESSED;
1299 if (infoPtr->flags & ESB_DISABLE_LTUP)
1300 info->rgstate[1] |= STATE_SYSTEM_UNAVAILABLE;
1301
1302 /* Page up/left region state. MSDN says up/right, but I don't believe it */
1303 info->rgstate[2] = 0;
1304 if (infoPtr->curVal == infoPtr->minVal)
1305 info->rgstate[2] |= STATE_SYSTEM_INVISIBLE;
1306 if (pressed && SCROLL_trackHitTest == SCROLL_TOP_RECT)
1307 info->rgstate[2] |= STATE_SYSTEM_PRESSED;
1308
1309 /* Thumb state */
1310 info->rgstate[3] = 0;
1311 if (pressed && SCROLL_trackHitTest == SCROLL_THUMB)
1312 info->rgstate[3] |= STATE_SYSTEM_PRESSED;
1313
1314 /* Page down/right region state. MSDN says down/left, but I don't believe it */
1315 info->rgstate[4] = 0;
1316 if (infoPtr->curVal >= infoPtr->maxVal - 1)
1317 info->rgstate[4] |= STATE_SYSTEM_INVISIBLE;
1318 if (pressed && SCROLL_trackHitTest == SCROLL_BOTTOM_RECT)
1319 info->rgstate[4] |= STATE_SYSTEM_PRESSED;
1320
1321 /* Bottom/right arrow button state. MSDN says bottom/left, but I don't believe it */
1322 info->rgstate[5] = 0;
1323 if (pressed && SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW)
1324 info->rgstate[5] |= STATE_SYSTEM_PRESSED;
1325 if (infoPtr->flags & ESB_DISABLE_RTDN)
1326 info->rgstate[5] |= STATE_SYSTEM_UNAVAILABLE;
1327
1328 return TRUE;
1329 }
1330
1331
1332 /*************************************************************************
1333 * SCROLL_GetScrollPos
1334 *
1335 * Internal helper for the API function
1336 *
1337 * PARAMS
1338 * hwnd [I] Handle of window with scrollbar(s)
1339 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1340 */
1341 static INT SCROLL_GetScrollPos(HWND hwnd, INT nBar)
1342 {
1343 LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
1344 return infoPtr ? infoPtr->curVal: 0;
1345 }
1346
1347
1348 /*************************************************************************
1349 * SCROLL_GetScrollRange
1350 *
1351 * Internal helper for the API function
1352 *
1353 * PARAMS
1354 * hwnd [I] Handle of window with scrollbar(s)
1355 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1356 * lpMin [O] Where to store minimum value
1357 * lpMax [O] Where to store maximum value
1358 *
1359 * RETURNS
1360 * Success: TRUE
1361 * Failure: FALSE
1362 */
1363 static BOOL SCROLL_GetScrollRange(HWND hwnd, INT nBar, LPINT lpMin, LPINT lpMax)
1364 {
1365 LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
1366
1367 if (lpMin) *lpMin = infoPtr ? infoPtr->minVal : 0;
1368 if (lpMax) *lpMax = infoPtr ? infoPtr->maxVal : 0;
1369
1370 return TRUE;
1371 }
1372
1373
1374 /*************************************************************************
1375 * SCROLL_SetScrollRange
1376 *
1377 * PARAMS
1378 * hwnd [I] Handle of window with scrollbar(s)
1379 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1380 * lpMin [I] Minimum value
1381 * lpMax [I] Maximum value
1382 *
1383 */
1384 static BOOL SCROLL_SetScrollRange(HWND hwnd, INT nBar, INT minVal, INT maxVal)
1385 {
1386 LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
1387
1388 TRACE("hwnd=%p nBar=%d min=%d max=%d\n", hwnd, nBar, minVal, maxVal);
1389
1390 if (infoPtr)
1391 {
1392 infoPtr->minVal = minVal;
1393 infoPtr->maxVal = maxVal;
1394 }
1395 return TRUE;
1396 }
1397
1398
1399 /***********************************************************************
1400 * ScrollBarWndProc_common
1401 */
1402 LRESULT ScrollBarWndProc_common( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam, BOOL unicode )
1403 {
1404 if (!IsWindow( hwnd )) return 0;
1405
1406 switch(message)
1407 {
1408 case WM_CREATE:
1409 SCROLL_CreateScrollBar(hwnd, (LPCREATESTRUCTW)lParam);
1410 break;
1411
1412 case WM_ENABLE:
1413 {
1414 SCROLLBAR_INFO *infoPtr;
1415 if ((infoPtr = SCROLL_GetInternalInfo( hwnd, SB_CTL, FALSE )))
1416 {
1417 infoPtr->flags = wParam ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH;
1418 SCROLL_RefreshScrollBar(hwnd, SB_CTL, TRUE, TRUE);
1419 }
1420 }
1421 return 0;
1422
1423 case WM_LBUTTONDBLCLK:
1424 case WM_LBUTTONDOWN:
1425 {
1426 POINT pt;
1427 pt.x = (short)LOWORD(lParam);
1428 pt.y = (short)HIWORD(lParam);
1429 SCROLL_TrackScrollBar( hwnd, SB_CTL, pt );
1430 }
1431 break;
1432 case WM_LBUTTONUP:
1433 case WM_MOUSEMOVE:
1434 case WM_SYSTIMER:
1435 {
1436 POINT pt;
1437 pt.x = (short)LOWORD(lParam);
1438 pt.y = (short)HIWORD(lParam);
1439 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1440 }
1441 break;
1442
1443 case WM_KEYDOWN:
1444 SCROLL_HandleKbdEvent(hwnd, wParam, lParam);
1445 break;
1446
1447 case WM_KEYUP:
1448 ShowCaret(hwnd);
1449 break;
1450
1451 case WM_SETFOCUS:
1452 {
1453 /* Create a caret when a ScrollBar get focus */
1454 RECT rect;
1455 int arrowSize, thumbSize, thumbPos, vertical;
1456 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1457 &arrowSize, &thumbSize, &thumbPos );
1458 if (!vertical)
1459 {
1460 CreateCaret(hwnd, (HBITMAP)1, thumbSize-2, rect.bottom-rect.top-2);
1461 SetCaretPos(thumbPos+1, rect.top+1);
1462 }
1463 else
1464 {
1465 CreateCaret(hwnd, (HBITMAP)1, rect.right-rect.left-2,thumbSize-2);
1466 SetCaretPos(rect.top+1, thumbPos+1);
1467 }
1468 ShowCaret(hwnd);
1469 }
1470 break;
1471
1472 case WM_KILLFOCUS:
1473 {
1474 RECT rect;
1475 int arrowSize, thumbSize, thumbPos, vertical;
1476 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1477 if (!vertical){
1478 rect.left=thumbPos+1;
1479 rect.right=rect.left+thumbSize;
1480 }
1481 else
1482 {
1483 rect.top=thumbPos+1;
1484 rect.bottom=rect.top+thumbSize;
1485 }
1486 HideCaret(hwnd);
1487 InvalidateRect(hwnd,&rect,0);
1488 DestroyCaret();
1489 }
1490 break;
1491
1492 case WM_ERASEBKGND:
1493 return 1;
1494
1495 case WM_GETDLGCODE:
1496 return DLGC_WANTARROWS; /* Windows returns this value */
1497
1498 case WM_PAINT:
1499 {
1500 PAINTSTRUCT ps;
1501 HDC hdc = wParam ? (HDC)wParam : BeginPaint(hwnd, &ps);
1502 if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEGRIP)
1503 {
1504 SCROLL_DrawSizeGrip( hwnd, hdc);
1505 }
1506 else if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEBOX)
1507 {
1508 RECT rc;
1509 GetClientRect( hwnd, &rc );
1510 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
1511 }
1512 else
1513 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1514 if (!wParam) EndPaint(hwnd, &ps);
1515 }
1516 break;
1517
1518 case SBM_SETPOS:
1519 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1520
1521 case SBM_GETPOS:
1522 return SCROLL_GetScrollPos(hwnd, SB_CTL);
1523
1524 case SBM_SETRANGEREDRAW:
1525 case SBM_SETRANGE:
1526 {
1527 INT oldPos = SCROLL_GetScrollPos( hwnd, SB_CTL );
1528 SCROLL_SetScrollRange( hwnd, SB_CTL, wParam, lParam );
1529 if (message == SBM_SETRANGEREDRAW)
1530 SCROLL_RefreshScrollBar( hwnd, SB_CTL, TRUE, TRUE );
1531 if (oldPos != SCROLL_GetScrollPos( hwnd, SB_CTL )) return oldPos;
1532 }
1533 return 0;
1534
1535 case SBM_GETRANGE:
1536 return SCROLL_GetScrollRange(hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam);
1537
1538 case SBM_ENABLE_ARROWS:
1539 return EnableScrollBar( hwnd, SB_CTL, wParam );
1540
1541 case SBM_SETSCROLLINFO:
1542 return SCROLL_SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1543
1544 case SBM_GETSCROLLINFO:
1545 return SCROLL_GetScrollInfo(hwnd, SB_CTL, (SCROLLINFO *)lParam);
1546
1547 case SBM_GETSCROLLBARINFO:
1548 return SCROLL_GetScrollBarInfo(hwnd, OBJID_CLIENT, (SCROLLBARINFO *)lParam);
1549
1550 case 0x00e5:
1551 case 0x00e7:
1552 case 0x00e8:
1553 case 0x00ec:
1554 case 0x00ed:
1555 case 0x00ee:
1556 case 0x00ef:
1557 ERR("unknown Win32 msg %04x wp=%08lx lp=%08lx\n",
1558 message, wParam, lParam );
1559 break;
1560
1561 default:
1562 if (message >= WM_USER)
1563 WARN("unknown msg %04x wp=%04lx lp=%08lx\n",
1564 message, wParam, lParam );
1565 if (unicode)
1566 return DefWindowProcW( hwnd, message, wParam, lParam );
1567 else
1568 return DefWindowProcA( hwnd, message, wParam, lParam );
1569 }
1570 return 0;
1571 }
1572
1573
1574 /*************************************************************************
1575 * SetScrollInfo (USER32.@)
1576 *
1577 * SetScrollInfo can be used to set the position, upper bound,
1578 * lower bound, and page size of a scrollbar control.
1579 *
1580 * PARAMS
1581 * hwnd [I] Handle of window with scrollbar(s)
1582 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1583 * info [I] Specifies what to change and new values
1584 * bRedraw [I] Should scrollbar be redrawn afterwards?
1585 *
1586 * RETURNS
1587 * Scrollbar position
1588 *
1589 * NOTE
1590 * For 100 lines of text to be displayed in a window of 25 lines,
1591 * one would for instance use info->nMin=0, info->nMax=75
1592 * (corresponding to the 76 different positions of the window on
1593 * the text), and info->nPage=25.
1594 */
1595 INT WINAPI SetScrollInfo(HWND hwnd, INT nBar, const SCROLLINFO *info, BOOL bRedraw)
1596 {
1597 TRACE("hwnd=%p nBar=%d info=%p, bRedraw=%d\n", hwnd, nBar, info, bRedraw);
1598
1599 /* Refer SB_CTL requests to the window */
1600 if (nBar == SB_CTL)
1601 return SendMessageW(hwnd, SBM_SETSCROLLINFO, bRedraw, (LPARAM)info);
1602 else
1603 return SCROLL_SetScrollInfo( hwnd, nBar, info, bRedraw );
1604 }
1605
1606 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar, LPCSCROLLINFO info, BOOL bRedraw )
1607 {
1608 /* Update the scrollbar state and set action flags according to
1609 * what has to be done graphics wise. */
1610
1611 SCROLLBAR_INFO *infoPtr;
1612 UINT new_flags;
1613 INT action = 0;
1614
1615 /* handle invalid data structure */
1616 if (!SCROLL_ScrollInfoValid(info)
1617 || !(infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, TRUE)))
1618 return 0;
1619
1620 if (TRACE_ON(scroll))
1621 {
1622 TRACE("hwnd=%p bar=%d", hwnd, nBar);
1623 if (info->fMask & SIF_PAGE) TRACE( " page=%d", info->nPage );
1624 if (info->fMask & SIF_POS) TRACE( " pos=%d", info->nPos );
1625 if (info->fMask & SIF_RANGE) TRACE( " min=%d max=%d", info->nMin, info->nMax );
1626 TRACE("\n");
1627 }
1628
1629 /* Set the page size */
1630
1631 if (info->fMask & SIF_PAGE)
1632 {
1633 if( infoPtr->page != info->nPage )
1634 {
1635 infoPtr->page = info->nPage;
1636 action |= SA_SSI_REFRESH;
1637 }
1638 }
1639
1640 /* Set the scroll pos */
1641
1642 if (info->fMask & SIF_POS)
1643 {
1644 if( infoPtr->curVal != info->nPos )
1645 {
1646 infoPtr->curVal = info->nPos;
1647 action |= SA_SSI_REFRESH;
1648 }
1649 }
1650
1651 /* Set the scroll range */
1652
1653 if (info->fMask & SIF_RANGE)
1654 {
1655 /* Invalid range -> range is set to (0,0) */
1656 if ((info->nMin > info->nMax) ||
1657 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1658 {
1659 action |= SA_SSI_REFRESH;
1660 infoPtr->minVal = 0;
1661 infoPtr->maxVal = 0;
1662 }
1663 else
1664 {
1665 if( infoPtr->minVal != info->nMin ||
1666 infoPtr->maxVal != info->nMax )
1667 {
1668 action |= SA_SSI_REFRESH;
1669 infoPtr->minVal = info->nMin;
1670 infoPtr->maxVal = info->nMax;
1671 }
1672 }
1673 }
1674
1675 /* Make sure the page size is valid */
1676 if (infoPtr->page < 0) infoPtr->page = 0;
1677 else if (infoPtr->page > infoPtr->maxVal - infoPtr->minVal + 1 )
1678 infoPtr->page = infoPtr->maxVal - infoPtr->minVal + 1;
1679
1680 /* Make sure the pos is inside the range */
1681
1682 if (infoPtr->curVal < infoPtr->minVal)
1683 infoPtr->curVal = infoPtr->minVal;
1684 else if (infoPtr->curVal > infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1685 infoPtr->curVal = infoPtr->maxVal - max( infoPtr->page-1, 0 );
1686
1687 TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1688 infoPtr->page, infoPtr->curVal,
1689 infoPtr->minVal, infoPtr->maxVal );
1690
1691 /* don't change the scrollbar state if SetScrollInfo
1692 * is just called with SIF_DISABLENOSCROLL
1693 */
1694 if(!(info->fMask & SIF_ALL)) goto done;
1695
1696 /* Check if the scrollbar should be hidden or disabled */
1697
1698 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1699 {
1700 new_flags = infoPtr->flags;
1701 if (infoPtr->minVal >= infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1702 {
1703 /* Hide or disable scroll-bar */
1704 if (info->fMask & SIF_DISABLENOSCROLL)
1705 {
1706 new_flags = ESB_DISABLE_BOTH;
1707 action |= SA_SSI_REFRESH;
1708 }
1709 else if ((nBar != SB_CTL) && (action & SA_SSI_REFRESH))
1710 {
1711 action = SA_SSI_HIDE;
1712 }
1713 }
1714 else /* Show and enable scroll-bar only if no page only changed. */
1715 if (info->fMask != SIF_PAGE)
1716 {
1717 new_flags = ESB_ENABLE_BOTH;
1718 if ((nBar != SB_CTL) && ( (action & SA_SSI_REFRESH) ))
1719 action |= SA_SSI_SHOW;
1720 }
1721
1722 if (infoPtr->flags != new_flags) /* check arrow flags */
1723 {
1724 infoPtr->flags = new_flags;
1725 action |= SA_SSI_REPAINT_ARROWS;
1726 }
1727 }
1728
1729 done:
1730 if( action & SA_SSI_HIDE )
1731 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1732 else
1733 {
1734 if( action & SA_SSI_SHOW )
1735 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1736 return infoPtr->curVal; /* SetWindowPos() already did the painting */
1737
1738 if( bRedraw )
1739 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1740 else if( action & SA_SSI_REPAINT_ARROWS )
1741 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1742 }
1743
1744 /* Return current position */
1745 return infoPtr->curVal;
1746 }
1747
1748
1749 /*************************************************************************
1750 * GetScrollInfo (USER32.@)
1751 *
1752 * GetScrollInfo can be used to retrieve the position, upper bound,
1753 * lower bound, and page size of a scrollbar control.
1754 *
1755 * PARAMS
1756 * hwnd [I] Handle of window with scrollbar(s)
1757 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1758 * info [IO] fMask specifies which values to retrieve
1759 *
1760 * RETURNS
1761 * TRUE if SCROLLINFO is filled
1762 * ( if nBar is SB_CTL, GetScrollInfo returns TRUE even if nothing
1763 * is filled)
1764 */
1765 BOOL WINAPI GetScrollInfo(HWND hwnd, INT nBar, LPSCROLLINFO info)
1766 {
1767 TRACE("hwnd=%p nBar=%d info=%p\n", hwnd, nBar, info);
1768
1769 /* Refer SB_CTL requests to the window */
1770 if (nBar == SB_CTL)
1771 {
1772 SendMessageW(hwnd, SBM_GETSCROLLINFO, 0, (LPARAM)info);
1773 return TRUE;
1774 }
1775 return SCROLL_GetScrollInfo(hwnd, nBar, info);
1776 }
1777
1778
1779 /*************************************************************************
1780 * GetScrollBarInfo (USER32.@)
1781 *
1782 * GetScrollBarInfo can be used to retrieve information about a scrollbar
1783 * control.
1784 *
1785 * PARAMS
1786 * hwnd [I] Handle of window with scrollbar(s)
1787 * idObject [I] One of OBJID_CLIENT, OBJID_HSCROLL, or OBJID_VSCROLL
1788 * info [IO] cbSize specifies the size of SCROLLBARINFO
1789 *
1790 * RETURNS
1791 * TRUE if success
1792 */
1793 BOOL WINAPI GetScrollBarInfo(HWND hwnd, LONG idObject, LPSCROLLBARINFO info)
1794 {
1795 TRACE("hwnd=%p idObject=%d info=%p\n", hwnd, idObject, info);
1796
1797 /* Refer OBJID_CLIENT requests to the window */
1798 if (idObject == OBJID_CLIENT)
1799 return SendMessageW(hwnd, SBM_GETSCROLLBARINFO, 0, (LPARAM)info);
1800 else
1801 return SCROLL_GetScrollBarInfo(hwnd, idObject, info);
1802 }
1803
1804
1805 /*************************************************************************
1806 * SetScrollPos (USER32.@)
1807 *
1808 * Sets the current position of the scroll thumb.
1809 *
1810 * PARAMS
1811 * hwnd [I] Handle of window with scrollbar(s)
1812 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1813 * nPos [I] New value
1814 * bRedraw [I] Should scrollbar be redrawn afterwards?
1815 *
1816 * RETURNS
1817 * Success: Scrollbar position
1818 * Failure: 0
1819 *
1820 * REMARKS
1821 * Note the ambiguity when 0 is returned. Use GetLastError
1822 * to make sure there was an error (and to know which one).
1823 */
1824 INT WINAPI SetScrollPos( HWND hwnd, INT nBar, INT nPos, BOOL bRedraw)
1825 {
1826 SCROLLINFO info;
1827 SCROLLBAR_INFO *infoPtr;
1828 INT oldPos;
1829
1830 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, FALSE ))) return 0;
1831 oldPos = infoPtr->curVal;
1832 info.cbSize = sizeof(info);
1833 info.nPos = nPos;
1834 info.fMask = SIF_POS;
1835 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1836 return oldPos;
1837 }
1838
1839
1840 /*************************************************************************
1841 * GetScrollPos (USER32.@)
1842 *
1843 * Gets the current position of the scroll thumb.
1844 *
1845 * PARAMS
1846 * hwnd [I] Handle of window with scrollbar(s)
1847 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1848 *
1849 * RETURNS
1850 * Success: Current position
1851 * Failure: 0
1852 *
1853 * REMARKS
1854 * There is ambiguity when 0 is returned. Use GetLastError
1855 * to make sure there was an error (and to know which one).
1856 */
1857 INT WINAPI GetScrollPos(HWND hwnd, INT nBar)
1858 {
1859 TRACE("hwnd=%p nBar=%d\n", hwnd, nBar);
1860
1861 /* Refer SB_CTL requests to the window */
1862 if (nBar == SB_CTL)
1863 return SendMessageW(hwnd, SBM_GETPOS, 0, 0);
1864 else
1865 return SCROLL_GetScrollPos(hwnd, nBar);
1866 }
1867
1868
1869 /*************************************************************************
1870 * SetScrollRange (USER32.@)
1871 * The SetScrollRange function sets the minimum and maximum scroll box positions
1872 * If nMinPos and nMaxPos is the same value, the scroll bar will hide
1873 *
1874 * Sets the range of the scroll bar.
1875 *
1876 * PARAMS
1877 * hwnd [I] Handle of window with scrollbar(s)
1878 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1879 * minVal [I] New minimum value
1880 * maxVal [I] New Maximum value
1881 * bRedraw [I] Should scrollbar be redrawn afterwards?
1882 *
1883 * RETURNS
1884 * Success: TRUE
1885 * Failure: FALSE
1886 */
1887 BOOL WINAPI SetScrollRange(HWND hwnd, INT nBar, INT minVal, INT maxVal, BOOL bRedraw)
1888 {
1889 SCROLLINFO info;
1890
1891 TRACE("hwnd=%p nBar=%d min=%d max=%d, bRedraw=%d\n", hwnd, nBar, minVal, maxVal, bRedraw);
1892
1893 info.cbSize = sizeof(info);
1894 info.fMask = SIF_RANGE;
1895 info.nMin = minVal;
1896 info.nMax = maxVal;
1897 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1898 return TRUE;
1899 }
1900
1901
1902 /*************************************************************************
1903 * SCROLL_SetNCSbState
1904 *
1905 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1906 */
1907 INT SCROLL_SetNCSbState(HWND hwnd, int vMin, int vMax, int vPos,
1908 int hMin, int hMax, int hPos)
1909 {
1910 SCROLLINFO vInfo, hInfo;
1911
1912 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1913 vInfo.nMin = vMin;
1914 vInfo.nMax = vMax;
1915 vInfo.nPos = vPos;
1916 hInfo.nMin = hMin;
1917 hInfo.nMax = hMax;
1918 hInfo.nPos = hPos;
1919 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1920
1921 SCROLL_SetScrollInfo( hwnd, SB_VERT, &vInfo, TRUE );
1922 SCROLL_SetScrollInfo( hwnd, SB_HORZ, &hInfo, TRUE );
1923
1924 return 0;
1925 }
1926
1927
1928 /*************************************************************************
1929 * GetScrollRange (USER32.@)
1930 *
1931 * Gets the range of the scroll bar.
1932 *
1933 * PARAMS
1934 * hwnd [I] Handle of window with scrollbar(s)
1935 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1936 * lpMin [O] Where to store minimum value
1937 * lpMax [O] Where to store maximum value
1938 *
1939 * RETURNS
1940 * TRUE if values is filled
1941 */
1942 BOOL WINAPI GetScrollRange(HWND hwnd, INT nBar, LPINT lpMin, LPINT lpMax)
1943 {
1944 TRACE("hwnd=%p nBar=%d lpMin=%p lpMax=%p\n", hwnd, nBar, lpMin, lpMax);
1945
1946 /* Refer SB_CTL requests to the window */
1947 if (nBar == SB_CTL)
1948 SendMessageW(hwnd, SBM_GETRANGE, (WPARAM)lpMin, (LPARAM)lpMax);
1949 else
1950 SCROLL_GetScrollRange(hwnd, nBar, lpMin, lpMax);
1951
1952 return TRUE;
1953 }
1954
1955
1956 /*************************************************************************
1957 * SCROLL_ShowScrollBar()
1958 *
1959 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1960 */
1961 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar, BOOL fShowH, BOOL fShowV )
1962 {
1963 ULONG old_style, set_bits = 0, clear_bits = 0;
1964
1965 TRACE("hwnd=%p bar=%d horz=%d, vert=%d\n", hwnd, nBar, fShowH, fShowV );
1966
1967 switch(nBar)
1968 {
1969 case SB_CTL:
1970 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1971 return TRUE;
1972
1973 case SB_BOTH:
1974 case SB_HORZ:
1975 if (fShowH) set_bits |= WS_HSCROLL;
1976 else clear_bits |= WS_HSCROLL;
1977 if( nBar == SB_HORZ ) break;
1978 /* fall through */
1979 case SB_VERT:
1980 if (fShowV) set_bits |= WS_VSCROLL;
1981 else clear_bits |= WS_VSCROLL;
1982 break;
1983
1984 default:
1985 return FALSE; /* Nothing to do! */
1986 }
1987
1988 old_style = WIN_SetStyle( hwnd, set_bits, clear_bits );
1989 if ((old_style & clear_bits) != 0 || (old_style & set_bits) != set_bits)
1990 {
1991 /* frame has been changed, let the window redraw itself */
1992 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1993 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1994 return TRUE;
1995 }
1996 return FALSE; /* no frame changes */
1997 }
1998
1999
2000 /*************************************************************************
2001 * ShowScrollBar (USER32.@)
2002 *
2003 * Shows or hides the scroll bar.
2004 *
2005 * PARAMS
2006 * hwnd [I] Handle of window with scrollbar(s)
2007 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
2008 * fShow [I] TRUE = show, FALSE = hide
2009 *
2010 * RETURNS
2011 * Success: TRUE
2012 * Failure: FALSE
2013 */
2014 BOOL WINAPI ShowScrollBar(HWND hwnd, INT nBar, BOOL fShow)
2015 {
2016 if ( !hwnd )
2017 return FALSE;
2018
2019 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
2020 (nBar == SB_HORZ) ? 0 : fShow );
2021 return TRUE;
2022 }
2023
2024
2025 /*************************************************************************
2026 * EnableScrollBar (USER32.@)
2027 *
2028 * Enables or disables the scroll bars.
2029 */
2030 BOOL WINAPI EnableScrollBar( HWND hwnd, UINT nBar, UINT flags )
2031 {
2032 BOOL bFineWithMe;
2033 SCROLLBAR_INFO *infoPtr;
2034
2035 flags &= ESB_DISABLE_BOTH;
2036
2037 if (nBar == SB_BOTH)
2038 {
2039 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, SB_VERT, TRUE ))) return FALSE;
2040 if (!(bFineWithMe = (infoPtr->flags == flags)) )
2041 {
2042 infoPtr->flags = flags;
2043 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
2044 }
2045 nBar = SB_HORZ;
2046 }
2047 else
2048 bFineWithMe = TRUE;
2049
2050 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, TRUE ))) return FALSE;
2051 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
2052 infoPtr->flags = flags;
2053
2054 if (nBar == SB_CTL && (flags == ESB_DISABLE_BOTH || flags == ESB_ENABLE_BOTH))
2055 EnableWindow(hwnd, flags == ESB_ENABLE_BOTH);
2056
2057 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
2058 return TRUE;
2059 }
useful hacks and other patches not (yet) suitable for mainline