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Changes in crossover-wine-src-6.1.0 except for configure
[wine/hacks.git] / dlls / user32 / scroll.c
blob052e6d87a035bc42b9cbf3e8af6a17e855088ef9
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 "wine/winuser16.h"
37 #include "controls.h"
38 #include "win.h"
39 #include "wine/debug.h"
40 #include "user_private.h"
41
42 WINE_DEFAULT_DEBUG_CHANNEL(scroll);
43
44 typedef struct
45 {
46 INT curVal; /* Current scroll-bar value */
47 INT minVal; /* Minimum scroll-bar value */
48 INT maxVal; /* Maximum scroll-bar value */
49 INT page; /* Page size of scroll bar (Win32) */
50 UINT flags; /* EnableScrollBar flags */
51 } SCROLLBAR_INFO, *LPSCROLLBAR_INFO;
52
53
54 /* Minimum size of the rectangle between the arrows */
55 #define SCROLL_MIN_RECT 4
56
57 /* Minimum size of the thumb in pixels */
58 #define SCROLL_MIN_THUMB 6
59
60 /* Overlap between arrows and thumb */
61 #define SCROLL_ARROW_THUMB_OVERLAP 0
62
63 /* Delay (in ms) before first repetition when holding the button down */
64 #define SCROLL_FIRST_DELAY 200
65
66 /* Delay (in ms) between scroll repetitions */
67 #define SCROLL_REPEAT_DELAY 50
68
69 /* Scroll timer id */
70 #define SCROLL_TIMER 0
71
72 /* Scroll-bar hit testing */
73 enum SCROLL_HITTEST
74 {
75 SCROLL_NOWHERE, /* Outside the scroll bar */
76 SCROLL_TOP_ARROW, /* Top or left arrow */
77 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
78 SCROLL_THUMB, /* Thumb rectangle */
79 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
80 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
81 };
82
83 /* What to do after SCROLL_SetScrollInfo() */
84 #define SA_SSI_HIDE 0x0001
85 #define SA_SSI_SHOW 0x0002
86 #define SA_SSI_REFRESH 0x0004
87 #define SA_SSI_REPAINT_ARROWS 0x0008
88
89 /* Thumb-tracking info */
90 static HWND SCROLL_TrackingWin = 0;
91 static INT SCROLL_TrackingBar = 0;
92 static INT SCROLL_TrackingPos = 0;
93 static INT SCROLL_TrackingVal = 0;
94 /* Hit test code of the last button-down event */
95 static enum SCROLL_HITTEST SCROLL_trackHitTest;
96 static BOOL SCROLL_trackVertical;
97
98 /* Is the moving thumb being displayed? */
99 static BOOL SCROLL_MovingThumb = FALSE;
100
101 /* Local functions */
102 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
103 BOOL fShowH, BOOL fShowV );
104 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
105 const SCROLLINFO *info, BOOL bRedraw );
106 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
107 RECT *rect, INT arrowSize,
108 INT thumbSize, INT thumbPos,
109 UINT flags, BOOL vertical,
110 BOOL top_selected, BOOL bottom_selected );
111 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
112
113
114 /*********************************************************************
115 * scrollbar class descriptor
116 */
117 const struct builtin_class_descr SCROLL_builtin_class =
118 {
119 "ScrollBar", /* name */
120 CS_DBLCLKS | CS_VREDRAW | CS_HREDRAW | CS_PARENTDC, /* style */
121 NULL, /* procA (winproc is Unicode only) */
122 ScrollBarWndProc, /* procW */
123 sizeof(SCROLLBAR_INFO), /* extra */
124 IDC_ARROW, /* cursor */
125 0 /* brush */
126 };
127
128 /***********************************************************************
129 * SCROLL_ScrollInfoValid
130 *
131 * Determine if the supplied SCROLLINFO struct is valid.
132 * info [in] The SCROLLINFO struct to be tested
133 */
134 static inline BOOL SCROLL_ScrollInfoValid( LPCSCROLLINFO info )
135 {
136 return !(info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)
137 || (info->cbSize != sizeof(*info)
138 && info->cbSize != sizeof(*info) - sizeof(info->nTrackPos)));
139 }
140
141
142 /***********************************************************************
143 * SCROLL_GetInternalInfo
144
145 * Returns pointer to internal SCROLLBAR_INFO structure for nBar
146 * or NULL if failed (f.i. scroll bar does not exist yet)
147 * If alloc is TRUE and the struct does not exist yet, create it.
148 */
149 static SCROLLBAR_INFO *SCROLL_GetInternalInfo( HWND hwnd, INT nBar, BOOL alloc )
150 {
151 SCROLLBAR_INFO *infoPtr = NULL;
152 WND *wndPtr = WIN_GetPtr( hwnd );
153
154 if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return NULL;
155 switch(nBar)
156 {
157 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
158 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
159 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
160 case SB_BOTH: WARN("with SB_BOTH\n"); break;
161 }
162
163 if (!infoPtr && alloc)
164 {
165 if (nBar != SB_HORZ && nBar != SB_VERT)
166 WARN("Cannot initialize nBar=%d\n",nBar);
167 else if ((infoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(SCROLLBAR_INFO) )))
168 {
169 /* Set default values */
170 infoPtr->minVal = infoPtr->curVal = infoPtr->page = 0;
171 /* From MSDN: max for a standard scroll bar is 100 by default. */
172 infoPtr->maxVal = 100;
173 /* Scroll bar is enabled by default after create */
174 infoPtr->flags = ESB_ENABLE_BOTH;
175 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
176 else wndPtr->pVScroll = infoPtr;
177 }
178 }
179 WIN_ReleasePtr( wndPtr );
180 return infoPtr;
181 }
182
183
184 /***********************************************************************
185 * SCROLL_GetScrollBarRect
186 *
187 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
188 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
189 * 'arrowSize' returns the width or height of an arrow (depending on
190 * the orientation of the scrollbar), 'thumbSize' returns the size of
191 * the thumb, and 'thumbPos' returns the position of the thumb
192 * relative to the left or to the top.
193 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
194 */
195 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
196 INT *arrowSize, INT *thumbSize,
197 INT *thumbPos )
198 {
199 INT pixels;
200 BOOL vertical;
201 WND *wndPtr = WIN_GetPtr( hwnd );
202
203 if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return FALSE;
204
205 switch(nBar)
206 {
207 case SB_HORZ:
208 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
209 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
210 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
211 lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
212 if(wndPtr->dwStyle & WS_BORDER) {
213 lprect->left--;
214 lprect->right++;
215 } else if(wndPtr->dwStyle & WS_VSCROLL)
216 lprect->right++;
217 vertical = FALSE;
218 break;
219
220 case SB_VERT:
221 if((wndPtr->dwExStyle & WS_EX_LEFTSCROLLBAR) != 0)
222 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left - GetSystemMetrics(SM_CXVSCROLL);
223 else
224 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
225 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
226 lprect->right = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
227 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
228 if(wndPtr->dwStyle & WS_BORDER) {
229 lprect->top--;
230 lprect->bottom++;
231 } else if(wndPtr->dwStyle & WS_HSCROLL)
232 lprect->bottom++;
233 vertical = TRUE;
234 break;
235
236 case SB_CTL:
237 GetClientRect( hwnd, lprect );
238 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
239 break;
240
241 default:
242 WIN_ReleasePtr( wndPtr );
243 return FALSE;
244 }
245
246 if (vertical) pixels = lprect->bottom - lprect->top;
247 else pixels = lprect->right - lprect->left;
248
249 if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
250 {
251 if (pixels > SCROLL_MIN_RECT)
252 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
253 else
254 *arrowSize = 0;
255 *thumbPos = *thumbSize = 0;
256 }
257 else
258 {
259 SCROLLBAR_INFO *info = SCROLL_GetInternalInfo( hwnd, nBar, FALSE );
260 if (!info)
261 {
262 WARN("called for missing scroll bar\n");
263 WIN_ReleasePtr( wndPtr );
264 return FALSE;
265 }
266 *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
267 pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
268
269 if (info->page)
270 {
271 *thumbSize = MulDiv(pixels,info->page,(info->maxVal-info->minVal+1));
272 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
273 }
274 else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
275
276 if (((pixels -= *thumbSize ) < 0) ||
277 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
278 {
279 /* Rectangle too small or scrollbar disabled -> no thumb */
280 *thumbPos = *thumbSize = 0;
281 }
282 else
283 {
284 INT max = info->maxVal - max( info->page-1, 0 );
285 if (info->minVal >= max)
286 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
287 else
288 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
289 + MulDiv(pixels, (info->curVal-info->minVal),(max - info->minVal));
290 }
291 }
292 WIN_ReleasePtr( wndPtr );
293 return vertical;
294 }
295
296
297 /***********************************************************************
298 * SCROLL_GetThumbVal
299 *
300 * Compute the current scroll position based on the thumb position in pixels
301 * from the top of the scroll-bar.
302 */
303 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
304 BOOL vertical, INT pos )
305 {
306 INT thumbSize;
307 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
308
309 if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
310 return infoPtr->minVal;
311
312 if (infoPtr->page)
313 {
314 thumbSize = MulDiv(pixels,infoPtr->page,(infoPtr->maxVal-infoPtr->minVal+1));
315 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
316 }
317 else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
318
319 if ((pixels -= thumbSize) <= 0) return infoPtr->minVal;
320
321 pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
322 if (pos > pixels) pos = pixels;
323
324 if (!infoPtr->page) pos *= infoPtr->maxVal - infoPtr->minVal;
325 else pos *= infoPtr->maxVal - infoPtr->minVal - infoPtr->page + 1;
326 return infoPtr->minVal + ((pos + pixels / 2) / pixels);
327 }
328
329 /***********************************************************************
330 * SCROLL_PtInRectEx
331 */
332 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
333 {
334 RECT rect = *lpRect;
335
336 if (vertical)
337 {
338 rect.left -= lpRect->right - lpRect->left;
339 rect.right += lpRect->right - lpRect->left;
340 }
341 else
342 {
343 rect.top -= lpRect->bottom - lpRect->top;
344 rect.bottom += lpRect->bottom - lpRect->top;
345 }
346 return PtInRect( &rect, pt );
347 }
348
349 /***********************************************************************
350 * SCROLL_ClipPos
351 */
352 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
353 {
354 if( pt.x < lpRect->left )
355 pt.x = lpRect->left;
356 else
357 if( pt.x > lpRect->right )
358 pt.x = lpRect->right;
359
360 if( pt.y < lpRect->top )
361 pt.y = lpRect->top;
362 else
363 if( pt.y > lpRect->bottom )
364 pt.y = lpRect->bottom;
365
366 return pt;
367 }
368
369
370 /***********************************************************************
371 * SCROLL_HitTest
372 *
373 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
374 */
375 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
376 POINT pt, BOOL bDragging )
377 {
378 INT arrowSize, thumbSize, thumbPos;
379 RECT rect;
380
381 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
382 &arrowSize, &thumbSize, &thumbPos );
383
384 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
385 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
386
387 if (vertical)
388 {
389 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
390 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
391 if (!thumbPos) return SCROLL_TOP_RECT;
392 pt.y -= rect.top;
393 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
394 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
395 }
396 else /* horizontal */
397 {
398 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
399 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
400 if (!thumbPos) return SCROLL_TOP_RECT;
401 pt.x -= rect.left;
402 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
403 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
404 }
405 return SCROLL_THUMB;
406 }
407
408
409 /***********************************************************************
410 * SCROLL_DrawArrows
411 *
412 * Draw the scroll bar arrows.
413 */
414 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
415 RECT *rect, INT arrowSize, BOOL vertical,
416 BOOL top_pressed, BOOL bottom_pressed )
417 {
418 RECT r;
419
420 r = *rect;
421 if( vertical )
422 r.bottom = r.top + arrowSize;
423 else
424 r.right = r.left + arrowSize;
425
426 DrawFrameControl( hdc, &r, DFC_SCROLL,
427 (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
428 | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
429 | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
430
431 r = *rect;
432 if( vertical )
433 r.top = r.bottom-arrowSize;
434 else
435 r.left = r.right-arrowSize;
436
437 DrawFrameControl( hdc, &r, DFC_SCROLL,
438 (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
439 | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
440 | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
441 }
442
443 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
444 INT arrowSize, INT thumbSize )
445 {
446 INT pos = SCROLL_TrackingPos;
447 INT max_size;
448
449 if( vertical )
450 max_size = rect->bottom - rect->top;
451 else
452 max_size = rect->right - rect->left;
453
454 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
455
456 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
457 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
458 else if( pos > max_size )
459 pos = max_size;
460
461 SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
462 rect, arrowSize, thumbSize, pos,
463 0, vertical, FALSE, FALSE );
464
465 SCROLL_MovingThumb = !SCROLL_MovingThumb;
466 }
467
468 /***********************************************************************
469 * SCROLL_DrawInterior
470 *
471 * Draw the scroll bar interior (everything except the arrows).
472 */
473 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
474 RECT *rect, INT arrowSize,
475 INT thumbSize, INT thumbPos,
476 UINT flags, BOOL vertical,
477 BOOL top_selected, BOOL bottom_selected )
478 {
479 RECT r;
480 HPEN hSavePen;
481 HBRUSH hSaveBrush,hBrush;
482
483 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
484 * The window-owned scrollbars need to call DEFWND_ControlColor
485 * to correctly setup default scrollbar colors
486 */
487 if (nBar == SB_CTL)
488 {
489 hBrush = (HBRUSH)SendMessageW( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
490 (WPARAM)hdc,(LPARAM)hwnd);
491 }
492 else
493 {
494 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
495 }
496
497 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
498 hSaveBrush = SelectObject( hdc, hBrush );
499
500 /* Calculate the scroll rectangle */
501 r = *rect;
502 if (vertical)
503 {
504 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
505 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
506 }
507 else
508 {
509 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
510 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
511 }
512
513 /* Draw the scroll rectangles and thumb */
514 if (!thumbPos) /* No thumb to draw */
515 {
516 PatBlt( hdc, r.left, r.top,
517 r.right - r.left, r.bottom - r.top,
518 PATCOPY );
519
520 /* cleanup and return */
521 SelectObject( hdc, hSavePen );
522 SelectObject( hdc, hSaveBrush );
523 return;
524 }
525
526 if (vertical)
527 {
528 PatBlt( hdc, r.left, r.top,
529 r.right - r.left,
530 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
531 top_selected ? 0x0f0000 : PATCOPY );
532 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
533 PatBlt( hdc, r.left, r.top + thumbSize,
534 r.right - r.left,
535 r.bottom - r.top - thumbSize,
536 bottom_selected ? 0x0f0000 : PATCOPY );
537 r.bottom = r.top + thumbSize;
538 }
539 else /* horizontal */
540 {
541 PatBlt( hdc, r.left, r.top,
542 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
543 r.bottom - r.top,
544 top_selected ? 0x0f0000 : PATCOPY );
545 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
546 PatBlt( hdc, r.left + thumbSize, r.top,
547 r.right - r.left - thumbSize,
548 r.bottom - r.top,
549 bottom_selected ? 0x0f0000 : PATCOPY );
550 r.right = r.left + thumbSize;
551 }
552
553 /* Draw the thumb */
554 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
555
556 /* cleanup */
557 SelectObject( hdc, hSavePen );
558 SelectObject( hdc, hSaveBrush );
559 }
560
561
562 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
563 RECT *rect, INT arrowSize,
564 INT thumbSize, INT thumbPos,
565 UINT flags, BOOL vertical,
566 BOOL top_selected, BOOL bottom_selected )
567 {
568 RECT r;
569 HPEN hSavePen;
570 HBRUSH hSaveBrush,hBrush;
571 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
572
573 if (Save_SCROLL_MovingThumb &&
574 (SCROLL_TrackingWin == hwnd) &&
575 (SCROLL_TrackingBar == nBar))
576 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
577
578 /* Select the correct brush and pen */
579
580 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
581 * The window-owned scrollbars need to call DEFWND_ControlColor
582 * to correctly setup default scrollbar colors
583 */
584 if (nBar == SB_CTL) {
585 hBrush = (HBRUSH)SendMessageW( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
586 (WPARAM)hdc,(LPARAM)hwnd);
587 } else {
588 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
589 }
590 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
591 hSaveBrush = SelectObject( hdc, hBrush );
592
593 /* Calculate the scroll rectangle */
594
595 r = *rect;
596 if (vertical)
597 {
598 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
599 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
600 }
601 else
602 {
603 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
604 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
605 }
606
607 /* Draw the scroll bar frame */
608
609 /* Draw the scroll rectangles and thumb */
610
611 if (!thumbPos) /* No thumb to draw */
612 {
613 PatBlt( hdc, r.left, r.top, r.right - r.left, r.bottom - r.top, PATCOPY );
614
615 /* cleanup and return */
616 SelectObject( hdc, hSavePen );
617 SelectObject( hdc, hSaveBrush );
618 return;
619 }
620
621 if (vertical)
622 {
623 PatBlt( hdc, r.left, r.top, r.right - r.left,
624 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
625 top_selected ? 0x0f0000 : PATCOPY );
626 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
627 PatBlt( hdc, r.left, r.top + thumbSize, r.right - r.left,
628 r.bottom - r.top - thumbSize,
629 bottom_selected ? 0x0f0000 : PATCOPY );
630 r.bottom = r.top + thumbSize;
631 }
632 else /* horizontal */
633 {
634 PatBlt( hdc, r.left, r.top,
635 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
636 r.bottom - r.top, top_selected ? 0x0f0000 : PATCOPY );
637 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
638 PatBlt( hdc, r.left + thumbSize, r.top, r.right - r.left - thumbSize,
639 r.bottom - r.top, bottom_selected ? 0x0f0000 : PATCOPY );
640 r.right = r.left + thumbSize;
641 }
642
643 /* Draw the thumb */
644
645 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
646 Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
647 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
648
649 if (Save_SCROLL_MovingThumb &&
650 (SCROLL_TrackingWin == hwnd) &&
651 (SCROLL_TrackingBar == nBar))
652 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
653
654 /* cleanup */
655 SelectObject( hdc, hSavePen );
656 SelectObject( hdc, hSaveBrush );
657 }
658
659
660 /***********************************************************************
661 * SCROLL_DrawScrollBar
662 *
663 * Redraw the whole scrollbar.
664 */
665 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
666 BOOL arrows, BOOL interior )
667 {
668 INT arrowSize, thumbSize, thumbPos;
669 RECT rect;
670 BOOL vertical;
671 SCROLLBAR_INFO *infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, TRUE );
672 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
673 DWORD style = GetWindowLongW( hwnd, GWL_STYLE );
674
675 if (!(hwnd = WIN_GetFullHandle( hwnd ))) return;
676
677 if (!infoPtr ||
678 ((nBar == SB_VERT) && !(style & WS_VSCROLL)) ||
679 ((nBar == SB_HORZ) && !(style & WS_HSCROLL))) return;
680 if (!WIN_IsWindowDrawable( hwnd, FALSE )) return;
681
682 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
683 &arrowSize, &thumbSize, &thumbPos );
684
685 /* do not draw if the scrollbar rectangle is empty */
686 if(IsRectEmpty(&rect)) return;
687
688 if (Save_SCROLL_MovingThumb &&
689 (SCROLL_TrackingWin == hwnd) &&
690 (SCROLL_TrackingBar == nBar))
691 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
692
693 /* Draw the arrows */
694
695 if (arrows && arrowSize)
696 {
697 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
698 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
699 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
700 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
701 else
702 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
703 FALSE, FALSE );
704 }
705 if( interior )
706 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
707 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
708
709 if (Save_SCROLL_MovingThumb &&
710 (SCROLL_TrackingWin == hwnd) &&
711 (SCROLL_TrackingBar == nBar))
712 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
713
714 /* if scroll bar has focus, reposition the caret */
715 if(hwnd==GetFocus() && (nBar==SB_CTL))
716 {
717 if (!vertical)
718 {
719 SetCaretPos(thumbPos+1, rect.top+1);
720 }
721 else
722 {
723 SetCaretPos(rect.top+1, thumbPos+1);
724 }
725 }
726 }
727
728 /***********************************************************************
729 * SCROLL_DrawSizeGrip
730 *
731 * Draw the size grip.
732 */
733 static void SCROLL_DrawSizeGrip( HWND hwnd, HDC hdc)
734 {
735 RECT rc;
736
737 GetClientRect( hwnd, &rc );
738 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
739 rc.left = max( rc.left, rc.right - GetSystemMetrics(SM_CXVSCROLL) - 1 );
740 rc.top = max( rc.top, rc.bottom - GetSystemMetrics(SM_CYHSCROLL) - 1 );
741 DrawFrameControl( hdc, &rc, DFC_SCROLL, DFCS_SCROLLSIZEGRIP );
742 }
743
744
745 /***********************************************************************
746 * SCROLL_RefreshScrollBar
747 *
748 * Repaint the scroll bar interior after a SetScrollRange() or
749 * SetScrollPos() call.
750 */
751 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
752 BOOL arrows, BOOL interior )
753 {
754 HDC hdc = GetDCEx( hwnd, 0,
755 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
756 if (!hdc) return;
757
758 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
759 ReleaseDC( hwnd, hdc );
760 }
761
762
763 /***********************************************************************
764 * SCROLL_HandleKbdEvent
765 *
766 * Handle a keyboard event (only for SB_CTL scrollbars with focus).
767 *
768 * PARAMS
769 * hwnd [I] Handle of window with scrollbar(s)
770 * wParam [I] Variable input including enable state
771 * lParam [I] Variable input including input point
772 */
773 static void SCROLL_HandleKbdEvent(HWND hwnd, WPARAM wParam, LPARAM lParam)
774 {
775 TRACE("hwnd=%p wParam=%d lParam=%ld\n", hwnd, wParam, lParam);
776
777 /* hide caret on first KEYDOWN to prevent flicker */
778 if ((lParam & PFD_DOUBLEBUFFER_DONTCARE) == 0)
779 HideCaret(hwnd);
780
781 switch(wParam)
782 {
783 case VK_PRIOR: wParam = SB_PAGEUP; break;
784 case VK_NEXT: wParam = SB_PAGEDOWN; break;
785 case VK_HOME: wParam = SB_TOP; break;
786 case VK_END: wParam = SB_BOTTOM; break;
787 case VK_UP: wParam = SB_LINEUP; break;
788 case VK_DOWN: wParam = SB_LINEDOWN; break;
789 case VK_LEFT: wParam = SB_LINEUP; break;
790 case VK_RIGHT: wParam = SB_LINEDOWN; break;
791 default: return;
792 }
793 SendMessageW(GetParent(hwnd),
794 ((GetWindowLongW( hwnd, GWL_STYLE ) & SBS_VERT) ?
795 WM_VSCROLL : WM_HSCROLL), wParam, (LPARAM)hwnd);
796 }
797
798
799 /***********************************************************************
800 * SCROLL_HandleScrollEvent
801 *
802 * Handle a mouse or timer event for the scrollbar.
803 * 'pt' is the location of the mouse event in client (for SB_CTL) or
804 * windows coordinates.
805 */
806 static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
807 {
808 /* Previous mouse position for timer events */
809 static POINT prevPt;
810 /* Thumb position when tracking started. */
811 static UINT trackThumbPos;
812 /* Position in the scroll-bar of the last button-down event. */
813 static INT lastClickPos;
814 /* Position in the scroll-bar of the last mouse event. */
815 static INT lastMousePos;
816
817 enum SCROLL_HITTEST hittest;
818 HWND hwndOwner, hwndCtl;
819 BOOL vertical;
820 INT arrowSize, thumbSize, thumbPos;
821 RECT rect;
822 HDC hdc;
823
824 SCROLLBAR_INFO *infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, FALSE );
825 if (!infoPtr) return;
826 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
827 return;
828
829 if (nBar == SB_CTL && (GetWindowLongW( hwnd, GWL_STYLE ) & (SBS_SIZEGRIP | SBS_SIZEBOX)))
830 {
831 switch(msg)
832 {
833 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
834 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
835 SetCapture( hwnd );
836 prevPt = pt;
837 SCROLL_trackHitTest = hittest = SCROLL_THUMB;
838 break;
839 case WM_MOUSEMOVE:
840 GetClientRect(GetParent(GetParent(hwnd)),&rect);
841 prevPt = pt;
842 break;
843 case WM_LBUTTONUP:
844 ReleaseCapture();
845 SCROLL_trackHitTest = hittest = SCROLL_NOWHERE;
846 if (hwnd==GetFocus()) ShowCaret(hwnd);
847 break;
848 case WM_SYSTIMER:
849 pt = prevPt;
850 break;
851 }
852 return;
853 }
854
855 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
856 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
857 &arrowSize, &thumbSize, &thumbPos );
858 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
859 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
860
861 switch(msg)
862 {
863 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
864 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
865 SCROLL_trackVertical = vertical;
866 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
867 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
868 lastMousePos = lastClickPos;
869 trackThumbPos = thumbPos;
870 prevPt = pt;
871 if (nBar == SB_CTL && (GetWindowLongW(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
872 SetCapture( hwnd );
873 break;
874
875 case WM_MOUSEMOVE:
876 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
877 prevPt = pt;
878 break;
879
880 case WM_LBUTTONUP:
881 hittest = SCROLL_NOWHERE;
882 ReleaseCapture();
883 /* if scrollbar has focus, show back caret */
884 if (hwnd==GetFocus()) ShowCaret(hwnd);
885 break;
886
887 case WM_SYSTIMER:
888 pt = prevPt;
889 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
890 break;
891
892 default:
893 return; /* Should never happen */
894 }
895
896 TRACE("Event: hwnd=%p bar=%d msg=%s pt=%d,%d hit=%d\n",
897 hwnd, nBar, SPY_GetMsgName(msg,hwnd), pt.x, pt.y, hittest );
898
899 switch(SCROLL_trackHitTest)
900 {
901 case SCROLL_NOWHERE: /* No tracking in progress */
902 break;
903
904 case SCROLL_TOP_ARROW:
905 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
906 (hittest == SCROLL_trackHitTest), FALSE );
907 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
908 thumbPos, infoPtr->flags, vertical,
909 (hittest == SCROLL_trackHitTest), FALSE );
910 if (hittest == SCROLL_trackHitTest)
911 {
912 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
913 {
914 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
915 SB_LINEUP, (LPARAM)hwndCtl );
916 }
917
918 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
919 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
920 (TIMERPROC)0 );
921 }
922 else KillSystemTimer( hwnd, SCROLL_TIMER );
923 break;
924
925 case SCROLL_TOP_RECT:
926 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
927 thumbPos, infoPtr->flags, vertical,
928 (hittest == SCROLL_trackHitTest), FALSE );
929 if (hittest == SCROLL_trackHitTest)
930 {
931 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
932 {
933 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
934 SB_PAGEUP, (LPARAM)hwndCtl );
935 }
936 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
937 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
938 (TIMERPROC)0 );
939 }
940 else KillSystemTimer( hwnd, SCROLL_TIMER );
941 break;
942
943 case SCROLL_THUMB:
944 if (msg == WM_LBUTTONDOWN)
945 {
946 SCROLL_TrackingWin = hwnd;
947 SCROLL_TrackingBar = nBar;
948 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
949 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
950 vertical,
951 SCROLL_TrackingPos );
952 if (!SCROLL_MovingThumb)
953 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
954 }
955 else if (msg == WM_LBUTTONUP)
956 {
957 if (SCROLL_MovingThumb)
958 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
959
960 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
961 thumbPos, infoPtr->flags, vertical,
962 FALSE, FALSE );
963 }
964 else /* WM_MOUSEMOVE */
965 {
966 UINT pos;
967
968 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
969 else
970 {
971 pt = SCROLL_ClipPos( &rect, pt );
972 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
973 }
974 if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
975 {
976 if (SCROLL_MovingThumb)
977 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
978 arrowSize, thumbSize );
979 lastMousePos = pos;
980 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
981 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
982 vertical,
983 SCROLL_TrackingPos );
984 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
985 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
986 (LPARAM)hwndCtl );
987 if (!SCROLL_MovingThumb)
988 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
989 arrowSize, thumbSize );
990 }
991 }
992 break;
993
994 case SCROLL_BOTTOM_RECT:
995 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
996 thumbPos, infoPtr->flags, vertical,
997 FALSE, (hittest == SCROLL_trackHitTest) );
998 if (hittest == SCROLL_trackHitTest)
999 {
1000 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1001 {
1002 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1003 SB_PAGEDOWN, (LPARAM)hwndCtl );
1004 }
1005 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1006 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1007 (TIMERPROC)0 );
1008 }
1009 else KillSystemTimer( hwnd, SCROLL_TIMER );
1010 break;
1011
1012 case SCROLL_BOTTOM_ARROW:
1013 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1014 FALSE, (hittest == SCROLL_trackHitTest) );
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_LINEDOWN, (LPARAM)hwndCtl );
1024 }
1025
1026 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1027 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1028 (TIMERPROC)0 );
1029 }
1030 else KillSystemTimer( hwnd, SCROLL_TIMER );
1031 break;
1032 }
1033
1034 if (msg == WM_LBUTTONDOWN)
1035 {
1036
1037 if (hittest == SCROLL_THUMB)
1038 {
1039 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1040 trackThumbPos + lastMousePos - lastClickPos );
1041 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1042 MAKEWPARAM( SB_THUMBTRACK, val ), (LPARAM)hwndCtl );
1043 }
1044 }
1045
1046 if (msg == WM_LBUTTONUP)
1047 {
1048 hittest = SCROLL_trackHitTest;
1049 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1050
1051 if (hittest == SCROLL_THUMB)
1052 {
1053 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1054 trackThumbPos + lastMousePos - lastClickPos );
1055 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1056 MAKEWPARAM( SB_THUMBPOSITION, val ), (LPARAM)hwndCtl );
1057 }
1058 /* SB_ENDSCROLL doesn't report thumb position */
1059 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1060 SB_ENDSCROLL, (LPARAM)hwndCtl );
1061
1062 /* Terminate tracking */
1063 SCROLL_TrackingWin = 0;
1064 }
1065
1066 ReleaseDC( hwnd, hdc );
1067 }
1068
1069
1070 /***********************************************************************
1071 * SCROLL_TrackScrollBar
1072 *
1073 * Track a mouse button press on a scroll-bar.
1074 * pt is in screen-coordinates for non-client scroll bars.
1075 */
1076 void SCROLL_TrackScrollBar( HWND hwnd, INT scrollbar, POINT pt )
1077 {
1078 MSG msg;
1079 INT xoffset = 0, yoffset = 0;
1080
1081 if (scrollbar != SB_CTL)
1082 {
1083 WND *wndPtr = WIN_GetPtr( hwnd );
1084 if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return;
1085 xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
1086 yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
1087 WIN_ReleasePtr( wndPtr );
1088 ScreenToClient( hwnd, &pt );
1089 pt.x += xoffset;
1090 pt.y += yoffset;
1091 }
1092
1093 SCROLL_HandleScrollEvent( hwnd, scrollbar, WM_LBUTTONDOWN, pt );
1094
1095 do
1096 {
1097 if (!GetMessageW( &msg, 0, 0, 0 )) break;
1098 if (CallMsgFilterW( &msg, MSGF_SCROLLBAR )) continue;
1099 if (msg.message == WM_LBUTTONUP ||
1100 msg.message == WM_MOUSEMOVE ||
1101 (msg.message == WM_SYSTIMER && msg.wParam == SCROLL_TIMER))
1102 {
1103 pt.x = (short)LOWORD(msg.lParam) + xoffset;
1104 pt.y = (short)HIWORD(msg.lParam) + yoffset;
1105 SCROLL_HandleScrollEvent( hwnd, scrollbar, msg.message, pt );
1106 }
1107 else
1108 {
1109 TranslateMessage( &msg );
1110 DispatchMessageW( &msg );
1111 }
1112 if (!IsWindow( hwnd ))
1113 {
1114 ReleaseCapture();
1115 break;
1116 }
1117 } while (msg.message != WM_LBUTTONUP);
1118 }
1119
1120
1121 /***********************************************************************
1122 * SCROLL_CreateScrollBar
1123 *
1124 * Create a scroll bar
1125 *
1126 * PARAMS
1127 * hwnd [I] Handle of window with scrollbar(s)
1128 * lpCreate [I] The style and place of the scroll bar
1129 */
1130 static void SCROLL_CreateScrollBar(HWND hwnd, LPCREATESTRUCTW lpCreate)
1131 {
1132 LPSCROLLBAR_INFO info = SCROLL_GetInternalInfo(hwnd, SB_CTL, TRUE);
1133 if (!info) return;
1134
1135 TRACE("hwnd=%p lpCreate=%p\n", hwnd, lpCreate);
1136
1137 if (lpCreate->style & WS_DISABLED)
1138 {
1139 info->flags = ESB_DISABLE_BOTH;
1140 TRACE("Created WS_DISABLED scrollbar\n");
1141 }
1142
1143
1144 if (lpCreate->style & (SBS_SIZEGRIP | SBS_SIZEBOX))
1145 {
1146 if (lpCreate->style & SBS_SIZEBOXTOPLEFTALIGN)
1147 MoveWindow( hwnd, lpCreate->x, lpCreate->y, GetSystemMetrics(SM_CXVSCROLL)+1,
1148 GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1149 else if(lpCreate->style & SBS_SIZEBOXBOTTOMRIGHTALIGN)
1150 MoveWindow( hwnd, lpCreate->x+lpCreate->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1151 lpCreate->y+lpCreate->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1152 GetSystemMetrics(SM_CXVSCROLL)+1,
1153 GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1154 }
1155 else if (lpCreate->style & SBS_VERT)
1156 {
1157 if (lpCreate->style & SBS_LEFTALIGN)
1158 MoveWindow( hwnd, lpCreate->x, lpCreate->y,
1159 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreate->cy, FALSE );
1160 else if (lpCreate->style & SBS_RIGHTALIGN)
1161 MoveWindow( hwnd,
1162 lpCreate->x+lpCreate->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1163 lpCreate->y,
1164 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreate->cy, FALSE );
1165 }
1166 else /* SBS_HORZ */
1167 {
1168 if (lpCreate->style & SBS_TOPALIGN)
1169 MoveWindow( hwnd, lpCreate->x, lpCreate->y,
1170 lpCreate->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1171 else if (lpCreate->style & SBS_BOTTOMALIGN)
1172 MoveWindow( hwnd,
1173 lpCreate->x,
1174 lpCreate->y+lpCreate->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1175 lpCreate->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1176 }
1177 }
1178
1179
1180 /*************************************************************************
1181 * SCROLL_GetScrollInfo
1182 *
1183 * Internal helper for the API function
1184 *
1185 * PARAMS
1186 * hwnd [I] Handle of window with scrollbar(s)
1187 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1188 * info [IO] fMask specifies which values to retrieve
1189 *
1190 * RETURNS
1191 * FALSE if requested field not filled (f.i. scroll bar does not exist)
1192 */
1193 static BOOL SCROLL_GetScrollInfo(HWND hwnd, INT nBar, LPSCROLLINFO info)
1194 {
1195 LPSCROLLBAR_INFO infoPtr;
1196
1197 /* handle invalid data structure */
1198 if (!SCROLL_ScrollInfoValid(info)
1199 || !(infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE)))
1200 return FALSE;
1201
1202 /* fill in the desired scroll info structure */
1203 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->page;
1204 if (info->fMask & SIF_POS) info->nPos = infoPtr->curVal;
1205 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1206 info->nTrackPos = (SCROLL_TrackingWin == WIN_GetFullHandle(hwnd)) ? SCROLL_TrackingVal : infoPtr->curVal;
1207 if (info->fMask & SIF_RANGE)
1208 {
1209 info->nMin = infoPtr->minVal;
1210 info->nMax = infoPtr->maxVal;
1211 }
1212
1213 TRACE("cbSize %02x fMask %04x nMin %d nMax %d nPage %u nPos %d nTrackPos %d\n",
1214 info->cbSize, info->fMask, info->nMin, info->nMax, info->nPage,
1215 info->nPos, info->nTrackPos);
1216
1217 return (info->fMask & SIF_ALL) != 0;
1218 }
1219
1220
1221 /*************************************************************************
1222 * SCROLL_GetScrollBarInfo
1223 *
1224 * Internal helper for the API function
1225 *
1226 * PARAMS
1227 * hwnd [I] Handle of window with scrollbar(s)
1228 * idObject [I] One of OBJID_CLIENT, OBJID_HSCROLL, or OBJID_VSCROLL
1229 * info [IO] cbSize specifies the size of the structure
1230 *
1231 * RETURNS
1232 * FALSE if failed
1233 */
1234 static BOOL SCROLL_GetScrollBarInfo(HWND hwnd, LONG idObject, LPSCROLLBARINFO info)
1235 {
1236 LPSCROLLBAR_INFO infoPtr;
1237 INT nBar;
1238 INT nDummy;
1239 DWORD style = GetWindowLongW(hwnd, GWL_STYLE);
1240 BOOL pressed;
1241
1242 switch (idObject)
1243 {
1244 case OBJID_CLIENT: nBar = SB_CTL; break;
1245 case OBJID_HSCROLL: nBar = SB_HORZ; break;
1246 case OBJID_VSCROLL: nBar = SB_VERT; break;
1247 default: return FALSE;
1248 }
1249
1250 /* handle invalid data structure */
1251 if (info->cbSize != sizeof(*info))
1252 return FALSE;
1253
1254 SCROLL_GetScrollBarRect(hwnd, nBar, &info->rcScrollBar, &nDummy,
1255 &info->dxyLineButton, &info->xyThumbTop);
1256
1257 info->xyThumbBottom = info->xyThumbTop + info->dxyLineButton;
1258
1259 infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, TRUE);
1260
1261 /* Scroll bar state */
1262 info->rgstate[0] = 0;
1263 if ((nBar == SB_HORZ && !(style & WS_HSCROLL))
1264 || (nBar == SB_VERT && !(style & WS_VSCROLL)))
1265 info->rgstate[0] |= STATE_SYSTEM_INVISIBLE;
1266 if (infoPtr->minVal >= infoPtr->maxVal - max(infoPtr->page - 1, 0))
1267 {
1268 if (!(info->rgstate[0] & STATE_SYSTEM_INVISIBLE))
1269 info->rgstate[0] |= STATE_SYSTEM_UNAVAILABLE;
1270 else
1271 info->rgstate[0] |= STATE_SYSTEM_OFFSCREEN;
1272 }
1273 if (nBar == SB_CTL && !IsWindowEnabled(hwnd))
1274 info->rgstate[0] |= STATE_SYSTEM_UNAVAILABLE;
1275
1276 pressed = ((nBar == SB_VERT) == SCROLL_trackVertical && GetCapture() == hwnd);
1277
1278 /* Top/left arrow button state. MSDN says top/right, but I don't believe it */
1279 info->rgstate[1] = 0;
1280 if (pressed && SCROLL_trackHitTest == SCROLL_TOP_ARROW)
1281 info->rgstate[1] |= STATE_SYSTEM_PRESSED;
1282 if (infoPtr->flags & ESB_DISABLE_LTUP)
1283 info->rgstate[1] |= STATE_SYSTEM_UNAVAILABLE;
1284
1285 /* Page up/left region state. MSDN says up/right, but I don't believe it */
1286 info->rgstate[2] = 0;
1287 if (infoPtr->curVal == infoPtr->minVal)
1288 info->rgstate[2] |= STATE_SYSTEM_INVISIBLE;
1289 if (pressed && SCROLL_trackHitTest == SCROLL_TOP_RECT)
1290 info->rgstate[2] |= STATE_SYSTEM_PRESSED;
1291
1292 /* Thumb state */
1293 info->rgstate[3] = 0;
1294 if (pressed && SCROLL_trackHitTest == SCROLL_THUMB)
1295 info->rgstate[3] |= STATE_SYSTEM_PRESSED;
1296
1297 /* Page down/right region state. MSDN says down/left, but I don't believe it */
1298 info->rgstate[4] = 0;
1299 if (infoPtr->curVal >= infoPtr->maxVal - 1)
1300 info->rgstate[4] |= STATE_SYSTEM_INVISIBLE;
1301 if (pressed && SCROLL_trackHitTest == SCROLL_BOTTOM_RECT)
1302 info->rgstate[4] |= STATE_SYSTEM_PRESSED;
1303
1304 /* Bottom/right arrow button state. MSDN says bottom/left, but I don't believe it */
1305 info->rgstate[5] = 0;
1306 if (pressed && SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW)
1307 info->rgstate[5] |= STATE_SYSTEM_PRESSED;
1308 if (infoPtr->flags & ESB_DISABLE_RTDN)
1309 info->rgstate[5] |= STATE_SYSTEM_UNAVAILABLE;
1310
1311 return TRUE;
1312 }
1313
1314
1315 /*************************************************************************
1316 * SCROLL_GetScrollPos
1317 *
1318 * Internal helper for the API function
1319 *
1320 * PARAMS
1321 * hwnd [I] Handle of window with scrollbar(s)
1322 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1323 */
1324 static INT SCROLL_GetScrollPos(HWND hwnd, INT nBar)
1325 {
1326 LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
1327 return infoPtr ? infoPtr->curVal: 0;
1328 }
1329
1330
1331 /*************************************************************************
1332 * SCROLL_GetScrollRange
1333 *
1334 * Internal helper for the API function
1335 *
1336 * PARAMS
1337 * hwnd [I] Handle of window with scrollbar(s)
1338 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1339 * lpMin [O] Where to store minimum value
1340 * lpMax [O] Where to store maximum value
1341 *
1342 * RETURNS
1343 * Success: TRUE
1344 * Failure: FALSE
1345 */
1346 static BOOL SCROLL_GetScrollRange(HWND hwnd, INT nBar, LPINT lpMin, LPINT lpMax)
1347 {
1348 LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
1349
1350 if (lpMin) *lpMin = infoPtr ? infoPtr->minVal : 0;
1351 if (lpMax) *lpMax = infoPtr ? infoPtr->maxVal : 0;
1352
1353 return TRUE;
1354 }
1355
1356
1357 /*************************************************************************
1358 * SCROLL_SetScrollRange
1359 *
1360 * PARAMS
1361 * hwnd [I] Handle of window with scrollbar(s)
1362 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1363 * lpMin [I] Minimum value
1364 * lpMax [I] Maximum value
1365 *
1366 */
1367 static BOOL SCROLL_SetScrollRange(HWND hwnd, INT nBar, INT minVal, INT maxVal)
1368 {
1369 LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
1370
1371 TRACE("hwnd=%p nBar=%d min=%d max=%d\n", hwnd, nBar, minVal, maxVal);
1372
1373 if (infoPtr)
1374 {
1375 infoPtr->minVal = minVal;
1376 infoPtr->maxVal = maxVal;
1377 }
1378 return TRUE;
1379 }
1380
1381
1382 /***********************************************************************
1383 * ScrollBarWndProc
1384 */
1385 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1386 {
1387 if (!IsWindow( hwnd )) return 0;
1388
1389 switch(message)
1390 {
1391 case WM_CREATE:
1392 SCROLL_CreateScrollBar(hwnd, (LPCREATESTRUCTW)lParam);
1393 break;
1394
1395 case WM_ENABLE:
1396 {
1397 SCROLLBAR_INFO *infoPtr;
1398 if ((infoPtr = SCROLL_GetInternalInfo( hwnd, SB_CTL, FALSE )))
1399 {
1400 infoPtr->flags = wParam ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH;
1401 SCROLL_RefreshScrollBar(hwnd, SB_CTL, TRUE, TRUE);
1402 }
1403 }
1404 return 0;
1405
1406 case WM_LBUTTONDBLCLK:
1407 case WM_LBUTTONDOWN:
1408 {
1409 POINT pt;
1410 pt.x = (short)LOWORD(lParam);
1411 pt.y = (short)HIWORD(lParam);
1412 SCROLL_TrackScrollBar( hwnd, SB_CTL, pt );
1413 }
1414 break;
1415 case WM_LBUTTONUP:
1416 case WM_MOUSEMOVE:
1417 case WM_SYSTIMER:
1418 {
1419 POINT pt;
1420 pt.x = (short)LOWORD(lParam);
1421 pt.y = (short)HIWORD(lParam);
1422 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1423 }
1424 break;
1425
1426 case WM_KEYDOWN:
1427 SCROLL_HandleKbdEvent(hwnd, wParam, lParam);
1428 break;
1429
1430 case WM_KEYUP:
1431 ShowCaret(hwnd);
1432 break;
1433
1434 case WM_SETFOCUS:
1435 {
1436 /* Create a caret when a ScrollBar get focus */
1437 RECT rect;
1438 int arrowSize, thumbSize, thumbPos, vertical;
1439 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1440 &arrowSize, &thumbSize, &thumbPos );
1441 if (!vertical)
1442 {
1443 CreateCaret(hwnd, (HBITMAP)1, thumbSize-2, rect.bottom-rect.top-2);
1444 SetCaretPos(thumbPos+1, rect.top+1);
1445 }
1446 else
1447 {
1448 CreateCaret(hwnd, (HBITMAP)1, rect.right-rect.left-2,thumbSize-2);
1449 SetCaretPos(rect.top+1, thumbPos+1);
1450 }
1451 ShowCaret(hwnd);
1452 }
1453 break;
1454
1455 case WM_KILLFOCUS:
1456 {
1457 RECT rect;
1458 int arrowSize, thumbSize, thumbPos, vertical;
1459 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1460 if (!vertical){
1461 rect.left=thumbPos+1;
1462 rect.right=rect.left+thumbSize;
1463 }
1464 else
1465 {
1466 rect.top=thumbPos+1;
1467 rect.bottom=rect.top+thumbSize;
1468 }
1469 HideCaret(hwnd);
1470 InvalidateRect(hwnd,&rect,0);
1471 DestroyCaret();
1472 }
1473 break;
1474
1475 case WM_ERASEBKGND:
1476 return 1;
1477
1478 case WM_GETDLGCODE:
1479 return DLGC_WANTARROWS; /* Windows returns this value */
1480
1481 case WM_PAINT:
1482 {
1483 PAINTSTRUCT ps;
1484 HDC hdc = wParam ? (HDC)wParam : BeginPaint(hwnd, &ps);
1485 if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEGRIP)
1486 {
1487 SCROLL_DrawSizeGrip( hwnd, hdc);
1488 }
1489 else if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEBOX)
1490 {
1491 RECT rc;
1492 GetClientRect( hwnd, &rc );
1493 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
1494 }
1495 else
1496 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1497 if (!wParam) EndPaint(hwnd, &ps);
1498 }
1499 break;
1500
1501 case SBM_SETPOS16:
1502 case SBM_SETPOS:
1503 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1504
1505 case SBM_GETPOS16:
1506 case SBM_GETPOS:
1507 return SCROLL_GetScrollPos(hwnd, SB_CTL);
1508
1509 case SBM_SETRANGE16:
1510 if (wParam) message = SBM_SETRANGEREDRAW;
1511 wParam = LOWORD(lParam);
1512 lParam = HIWORD(lParam);
1513 /* fall through */
1514 case SBM_SETRANGEREDRAW:
1515 case SBM_SETRANGE:
1516 {
1517 INT oldPos = SCROLL_GetScrollPos( hwnd, SB_CTL );
1518 SCROLL_SetScrollRange( hwnd, SB_CTL, wParam, lParam );
1519 if (message == SBM_SETRANGEREDRAW)
1520 SCROLL_RefreshScrollBar( hwnd, SB_CTL, TRUE, TRUE );
1521 if (oldPos != SCROLL_GetScrollPos( hwnd, SB_CTL )) return oldPos;
1522 }
1523 return 0;
1524
1525 case SBM_GETRANGE16:
1526 {
1527 INT min, max;
1528
1529 SCROLL_GetScrollRange(hwnd, SB_CTL, &min, &max);
1530 return MAKELRESULT(min, max);
1531 }
1532
1533 case SBM_GETRANGE:
1534 return SCROLL_GetScrollRange(hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam);
1535
1536 case SBM_ENABLE_ARROWS16:
1537 case SBM_ENABLE_ARROWS:
1538 return EnableScrollBar( hwnd, SB_CTL, wParam );
1539
1540 case SBM_SETSCROLLINFO:
1541 return SCROLL_SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1542
1543 case SBM_GETSCROLLINFO:
1544 return SCROLL_GetScrollInfo(hwnd, SB_CTL, (SCROLLINFO *)lParam);
1545
1546 case SBM_GETSCROLLBARINFO:
1547 return SCROLL_GetScrollBarInfo(hwnd, OBJID_CLIENT, (SCROLLBARINFO *)lParam);
1548
1549 case 0x00e5:
1550 case 0x00e7:
1551 case 0x00e8:
1552 case 0x00ec:
1553 case 0x00ed:
1554 case 0x00ee:
1555 case 0x00ef:
1556 ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1557 message, wParam, lParam );
1558 break;
1559
1560 default:
1561 if (message >= WM_USER)
1562 WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1563 message, wParam, lParam );
1564 return DefWindowProcW( hwnd, message, wParam, lParam );
1565 }
1566 return 0;
1567 }
1568
1569
1570 /*************************************************************************
1571 * SetScrollInfo (USER32.@)
1572 *
1573 * SetScrollInfo can be used to set the position, upper bound,
1574 * lower bound, and page size of a scrollbar control.
1575 *
1576 * PARAMS
1577 * hwnd [I] Handle of window with scrollbar(s)
1578 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1579 * info [I] Specifies what to change and new values
1580 * bRedraw [I] Should scrollbar be redrawn afterwards?
1581 *
1582 * RETURNS
1583 * Scrollbar position
1584 *
1585 * NOTE
1586 * For 100 lines of text to be displayed in a window of 25 lines,
1587 * one would for instance use info->nMin=0, info->nMax=75
1588 * (corresponding to the 76 different positions of the window on
1589 * the text), and info->nPage=25.
1590 */
1591 INT WINAPI SetScrollInfo(HWND hwnd, INT nBar, const SCROLLINFO *info, BOOL bRedraw)
1592 {
1593 TRACE("hwnd=%p nBar=%d info=%p, bRedraw=%d\n", hwnd, nBar, info, bRedraw);
1594
1595 /* Refer SB_CTL requests to the window */
1596 if (nBar == SB_CTL)
1597 return SendMessageW(hwnd, SBM_SETSCROLLINFO, bRedraw, (LPARAM)info);
1598 else
1599 return SCROLL_SetScrollInfo( hwnd, nBar, info, bRedraw );
1600 }
1601
1602 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar, LPCSCROLLINFO info, BOOL bRedraw )
1603 {
1604 /* Update the scrollbar state and set action flags according to
1605 * what has to be done graphics wise. */
1606
1607 SCROLLBAR_INFO *infoPtr;
1608 UINT new_flags;
1609 INT action = 0;
1610
1611 /* handle invalid data structure */
1612 if (!SCROLL_ScrollInfoValid(info)
1613 || !(infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, TRUE)))
1614 return 0;
1615
1616 if (TRACE_ON(scroll))
1617 {
1618 TRACE("hwnd=%p bar=%d", hwnd, nBar);
1619 if (info->fMask & SIF_PAGE) TRACE( " page=%d", info->nPage );
1620 if (info->fMask & SIF_POS) TRACE( " pos=%d", info->nPos );
1621 if (info->fMask & SIF_RANGE) TRACE( " min=%d max=%d", info->nMin, info->nMax );
1622 TRACE("\n");
1623 }
1624
1625 /* Set the page size */
1626
1627 if (info->fMask & SIF_PAGE)
1628 {
1629 if( infoPtr->page != info->nPage && info->nPage >= 0)
1630 {
1631 infoPtr->page = info->nPage;
1632 action |= SA_SSI_REFRESH;
1633 }
1634 }
1635
1636 /* Set the scroll pos */
1637
1638 if (info->fMask & SIF_POS)
1639 {
1640 if( infoPtr->curVal != info->nPos )
1641 {
1642 infoPtr->curVal = info->nPos;
1643 action |= SA_SSI_REFRESH;
1644 }
1645 }
1646
1647 /* Set the scroll range */
1648
1649 if (info->fMask & SIF_RANGE)
1650 {
1651 /* Invalid range -> range is set to (0,0) */
1652 if ((info->nMin > info->nMax) ||
1653 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1654 {
1655 action |= SA_SSI_REFRESH;
1656 infoPtr->minVal = 0;
1657 infoPtr->maxVal = 0;
1658 }
1659 else
1660 {
1661 if( infoPtr->minVal != info->nMin ||
1662 infoPtr->maxVal != info->nMax )
1663 {
1664 action |= SA_SSI_REFRESH;
1665 infoPtr->minVal = info->nMin;
1666 infoPtr->maxVal = info->nMax;
1667 }
1668 }
1669 }
1670
1671 /* Make sure the page size is valid */
1672 if (infoPtr->page < 0) infoPtr->page = 0;
1673 else if (infoPtr->page > infoPtr->maxVal - infoPtr->minVal + 1 )
1674 infoPtr->page = infoPtr->maxVal - infoPtr->minVal + 1;
1675
1676 /* Make sure the pos is inside the range */
1677
1678 if (infoPtr->curVal < infoPtr->minVal)
1679 infoPtr->curVal = infoPtr->minVal;
1680 else if (infoPtr->curVal > infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1681 infoPtr->curVal = infoPtr->maxVal - max( infoPtr->page-1, 0 );
1682
1683 TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1684 infoPtr->page, infoPtr->curVal,
1685 infoPtr->minVal, infoPtr->maxVal );
1686
1687 /* don't change the scrollbar state if SetScrollInfo
1688 * is just called with SIF_DISABLENOSCROLL
1689 */
1690 if(!(info->fMask & SIF_ALL)) goto done;
1691
1692 /* Check if the scrollbar should be hidden or disabled */
1693
1694 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1695 {
1696 new_flags = infoPtr->flags;
1697 if (infoPtr->minVal >= infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1698 {
1699 /* Hide or disable scroll-bar */
1700 if (info->fMask & SIF_DISABLENOSCROLL)
1701 {
1702 new_flags = ESB_DISABLE_BOTH;
1703 action |= SA_SSI_REFRESH;
1704 }
1705 else if ((nBar != SB_CTL) && (action & SA_SSI_REFRESH))
1706 {
1707 action = SA_SSI_HIDE;
1708 }
1709 }
1710 else /* Show and enable scroll-bar only if no page only changed. */
1711 if (info->fMask != SIF_PAGE)
1712 {
1713 new_flags = ESB_ENABLE_BOTH;
1714 if ((nBar != SB_CTL) && ( (action & SA_SSI_REFRESH) ))
1715 action |= SA_SSI_SHOW;
1716 }
1717
1718 if (infoPtr->flags != new_flags) /* check arrow flags */
1719 {
1720 infoPtr->flags = new_flags;
1721 action |= SA_SSI_REPAINT_ARROWS;
1722 }
1723 }
1724
1725 done:
1726 if( action & SA_SSI_HIDE )
1727 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1728 else
1729 {
1730 if( action & SA_SSI_SHOW )
1731 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1732 return infoPtr->curVal; /* SetWindowPos() already did the painting */
1733
1734 if( bRedraw )
1735 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1736 else if( action & SA_SSI_REPAINT_ARROWS )
1737 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1738 }
1739
1740 /* Return current position */
1741 return infoPtr->curVal;
1742 }
1743
1744
1745 /*************************************************************************
1746 * GetScrollInfo (USER32.@)
1747 *
1748 * GetScrollInfo can be used to retrieve the position, upper bound,
1749 * lower bound, and page size of a scrollbar control.
1750 *
1751 * PARAMS
1752 * hwnd [I] Handle of window with scrollbar(s)
1753 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1754 * info [IO] fMask specifies which values to retrieve
1755 *
1756 * RETURNS
1757 * TRUE if SCROLLINFO is filled
1758 * ( if nBar is SB_CTL, GetScrollInfo returns TRUE even if nothing
1759 * is filled)
1760 */
1761 BOOL WINAPI GetScrollInfo(HWND hwnd, INT nBar, LPSCROLLINFO info)
1762 {
1763 TRACE("hwnd=%p nBar=%d info=%p\n", hwnd, nBar, info);
1764
1765 /* Refer SB_CTL requests to the window */
1766 if (nBar == SB_CTL)
1767 {
1768 SendMessageW(hwnd, SBM_GETSCROLLINFO, (WPARAM)0, (LPARAM)info);
1769 return TRUE;
1770 }
1771 return SCROLL_GetScrollInfo(hwnd, nBar, info);
1772 }
1773
1774
1775 /*************************************************************************
1776 * GetScrollBarInfo (USER32.@)
1777 *
1778 * GetScrollBarInfo can be used to retrieve information about a scrollbar
1779 * control.
1780 *
1781 * PARAMS
1782 * hwnd [I] Handle of window with scrollbar(s)
1783 * idObject [I] One of OBJID_CLIENT, OBJID_HSCROLL, or OBJID_VSCROLL
1784 * info [IO] cbSize specifies the size of SCROLLBARINFO
1785 *
1786 * RETURNS
1787 * TRUE if success
1788 */
1789 BOOL WINAPI GetScrollBarInfo(HWND hwnd, LONG idObject, LPSCROLLBARINFO info)
1790 {
1791 TRACE("hwnd=%p idObject=%d info=%p\n", hwnd, idObject, info);
1792
1793 /* Refer OBJID_CLIENT requests to the window */
1794 if (idObject == OBJID_CLIENT)
1795 return SendMessageW(hwnd, SBM_GETSCROLLBARINFO, (WPARAM)0, (LPARAM)info);
1796 else
1797 return SCROLL_GetScrollBarInfo(hwnd, idObject, info);
1798 }
1799
1800
1801 /*************************************************************************
1802 * SetScrollPos (USER32.@)
1803 *
1804 * Sets the current position of the scroll thumb.
1805 *
1806 * PARAMS
1807 * hwnd [I] Handle of window with scrollbar(s)
1808 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1809 * nPos [I] New value
1810 * bRedraw [I] Should scrollbar be redrawn afterwards?
1811 *
1812 * RETURNS
1813 * Success: Scrollbar position
1814 * Failure: 0
1815 *
1816 * REMARKS
1817 * Note the ambiguity when 0 is returned. Use GetLastError
1818 * to make sure there was an error (and to know which one).
1819 */
1820 INT WINAPI SetScrollPos( HWND hwnd, INT nBar, INT nPos, BOOL bRedraw)
1821 {
1822 SCROLLINFO info;
1823 SCROLLBAR_INFO *infoPtr;
1824 INT oldPos;
1825
1826 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, FALSE ))) return 0;
1827 oldPos = infoPtr->curVal;
1828 info.cbSize = sizeof(info);
1829 info.nPos = nPos;
1830 info.fMask = SIF_POS;
1831 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1832 return oldPos;
1833 }
1834
1835
1836 /*************************************************************************
1837 * GetScrollPos (USER32.@)
1838 *
1839 * Gets the current position of the scroll thumb.
1840 *
1841 * PARAMS
1842 * hwnd [I] Handle of window with scrollbar(s)
1843 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1844 *
1845 * RETURNS
1846 * Success: Current position
1847 * Failure: 0
1848 *
1849 * REMARKS
1850 * There is ambiguity when 0 is returned. Use GetLastError
1851 * to make sure there was an error (and to know which one).
1852 */
1853 INT WINAPI GetScrollPos(HWND hwnd, INT nBar)
1854 {
1855 TRACE("hwnd=%p nBar=%d\n", hwnd, nBar);
1856
1857 /* Refer SB_CTL requests to the window */
1858 if (nBar == SB_CTL)
1859 return SendMessageW(hwnd, SBM_GETPOS, (WPARAM)0, (LPARAM)0);
1860 else
1861 return SCROLL_GetScrollPos(hwnd, nBar);
1862 }
1863
1864
1865 /*************************************************************************
1866 * SetScrollRange (USER32.@)
1867 * The SetScrollRange function sets the minimum and maximum scroll box positions
1868 * If nMinPos and nMaxPos is the same value, the scroll bar will hide
1869 *
1870 * Sets the range of the scroll bar.
1871 *
1872 * PARAMS
1873 * hwnd [I] Handle of window with scrollbar(s)
1874 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1875 * minVal [I] New minimum value
1876 * maxVal [I] New Maximum value
1877 * bRedraw [I] Should scrollbar be redrawn afterwards?
1878 *
1879 * RETURNS
1880 * Success: TRUE
1881 * Failure: FALSE
1882 */
1883 BOOL WINAPI SetScrollRange(HWND hwnd, INT nBar, INT minVal, INT maxVal, BOOL bRedraw)
1884 {
1885 SCROLLINFO info;
1886
1887 TRACE("hwnd=%p nBar=%d min=%d max=%d, bRedraw=%d\n", hwnd, nBar, minVal, maxVal, bRedraw);
1888
1889 info.cbSize = sizeof(info);
1890 info.fMask = SIF_RANGE;
1891 info.nMin = minVal;
1892 info.nMax = maxVal;
1893 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1894 return TRUE;
1895 }
1896
1897
1898 /*************************************************************************
1899 * SCROLL_SetNCSbState
1900 *
1901 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1902 */
1903 INT SCROLL_SetNCSbState(HWND hwnd, int vMin, int vMax, int vPos,
1904 int hMin, int hMax, int hPos)
1905 {
1906 SCROLLINFO vInfo, hInfo;
1907
1908 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1909 vInfo.nMin = vMin;
1910 vInfo.nMax = vMax;
1911 vInfo.nPos = vPos;
1912 hInfo.nMin = hMin;
1913 hInfo.nMax = hMax;
1914 hInfo.nPos = hPos;
1915 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1916
1917 SCROLL_SetScrollInfo( hwnd, SB_VERT, &vInfo, TRUE );
1918 SCROLL_SetScrollInfo( hwnd, SB_HORZ, &hInfo, TRUE );
1919
1920 return 0;
1921 }
1922
1923
1924 /*************************************************************************
1925 * GetScrollRange (USER32.@)
1926 *
1927 * Gets the range of the scroll bar.
1928 *
1929 * PARAMS
1930 * hwnd [I] Handle of window with scrollbar(s)
1931 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
1932 * lpMin [O] Where to store minimum value
1933 * lpMax [O] Where to store maximum value
1934 *
1935 * RETURNS
1936 * TRUE if values is filled
1937 */
1938 BOOL WINAPI GetScrollRange(HWND hwnd, INT nBar, LPINT lpMin, LPINT lpMax)
1939 {
1940 TRACE("hwnd=%p nBar=%d lpMin=%p lpMax=%p\n", hwnd, nBar, lpMin, lpMax);
1941
1942 /* Refer SB_CTL requests to the window */
1943 if (nBar == SB_CTL)
1944 SendMessageW(hwnd, SBM_GETRANGE, (WPARAM)lpMin, (LPARAM)lpMax);
1945 else
1946 SCROLL_GetScrollRange(hwnd, nBar, lpMin, lpMax);
1947
1948 return TRUE;
1949 }
1950
1951
1952 /*************************************************************************
1953 * SCROLL_ShowScrollBar()
1954 *
1955 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1956 */
1957 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar, BOOL fShowH, BOOL fShowV )
1958 {
1959 ULONG old_style, set_bits = 0, clear_bits = 0;
1960
1961 TRACE("hwnd=%p bar=%d horz=%d, vert=%d\n", hwnd, nBar, fShowH, fShowV );
1962
1963 switch(nBar)
1964 {
1965 case SB_CTL:
1966 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1967 return TRUE;
1968
1969 case SB_BOTH:
1970 case SB_HORZ:
1971 if (fShowH) set_bits |= WS_HSCROLL;
1972 else clear_bits |= WS_HSCROLL;
1973 if( nBar == SB_HORZ ) break;
1974 /* fall through */
1975 case SB_VERT:
1976 if (fShowV) set_bits |= WS_VSCROLL;
1977 else clear_bits |= WS_VSCROLL;
1978 break;
1979
1980 default:
1981 return FALSE; /* Nothing to do! */
1982 }
1983
1984 old_style = WIN_SetStyle( hwnd, set_bits, clear_bits );
1985 if ((old_style & clear_bits) != 0 || (old_style & set_bits) != set_bits)
1986 {
1987 /* frame has been changed, let the window redraw itself */
1988 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1989 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1990 return TRUE;
1991 }
1992 return FALSE; /* no frame changes */
1993 }
1994
1995
1996 /*************************************************************************
1997 * ShowScrollBar (USER32.@)
1998 *
1999 * Shows or hides the scroll bar.
2000 *
2001 * PARAMS
2002 * hwnd [I] Handle of window with scrollbar(s)
2003 * nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
2004 * fShow [I] TRUE = show, FALSE = hide
2005 *
2006 * RETURNS
2007 * Success: TRUE
2008 * Failure: FALSE
2009 */
2010 BOOL WINAPI ShowScrollBar(HWND hwnd, INT nBar, BOOL fShow)
2011 {
2012 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
2013 (nBar == SB_HORZ) ? 0 : fShow );
2014 return TRUE;
2015 }
2016
2017
2018 /*************************************************************************
2019 * EnableScrollBar (USER32.@)
2020 *
2021 * Enables or disables the scroll bars.
2022 */
2023 BOOL WINAPI EnableScrollBar( HWND hwnd, UINT nBar, UINT flags )
2024 {
2025 BOOL bFineWithMe;
2026 SCROLLBAR_INFO *infoPtr;
2027
2028 TRACE("%p %d %d\n", hwnd, nBar, flags );
2029
2030 flags &= ESB_DISABLE_BOTH;
2031
2032 if (nBar == SB_BOTH)
2033 {
2034 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, SB_VERT, TRUE ))) return FALSE;
2035 if (!(bFineWithMe = (infoPtr->flags == flags)) )
2036 {
2037 infoPtr->flags = flags;
2038 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
2039 }
2040 nBar = SB_HORZ;
2041 }
2042 else
2043 bFineWithMe = TRUE;
2044
2045 if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, TRUE ))) return FALSE;
2046 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
2047 infoPtr->flags = flags;
2048
2049 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
2050 return TRUE;
2051 }
useful hacks and other patches not (yet) suitable for mainline