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Updated (prepare|unprepare)header functions (wave, midi) to allow
[wine/multimedia.git] / controls / scroll.c
blobd5705cd523fb12dc0d9f68a54a89c6fe8ae39f35
1 /*
2 * Scrollbar control
3 *
4 * Copyright 1993 Martin Ayotte
5 * Copyright 1994, 1996 Alexandre Julliard
6 */
7
8 #include "wine/winuser16.h"
9 #include "sysmetrics.h"
10 #include "scroll.h"
11 #include "heap.h"
12 #include "win.h"
13 #include "debug.h"
14
15
16 static HBITMAP hUpArrow = 0;
17 static HBITMAP hDnArrow = 0;
18 static HBITMAP hLfArrow = 0;
19 static HBITMAP hRgArrow = 0;
20 static HBITMAP hUpArrowD = 0;
21 static HBITMAP hDnArrowD = 0;
22 static HBITMAP hLfArrowD = 0;
23 static HBITMAP hRgArrowD = 0;
24 static HBITMAP hUpArrowI = 0;
25 static HBITMAP hDnArrowI = 0;
26 static HBITMAP hLfArrowI = 0;
27 static HBITMAP hRgArrowI = 0;
28
29 #define TOP_ARROW(flags,pressed) \
30 (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
31 #define BOTTOM_ARROW(flags,pressed) \
32 (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
33 #define LEFT_ARROW(flags,pressed) \
34 (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
35 #define RIGHT_ARROW(flags,pressed) \
36 (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
37
38
39 /* Minimum size of the rectangle between the arrows */
40 #define SCROLL_MIN_RECT 4
41
42 /* Minimum size of the thumb in pixels */
43 #define SCROLL_MIN_THUMB 6
44
45 /* Overlap between arrows and thumb */
46 #define SCROLL_ARROW_THUMB_OVERLAP 1
47
48 /* Delay (in ms) before first repetition when holding the button down */
49 #define SCROLL_FIRST_DELAY 200
50
51 /* Delay (in ms) between scroll repetitions */
52 #define SCROLL_REPEAT_DELAY 50
53
54 /* Scroll timer id */
55 #define SCROLL_TIMER 0
56
57 /* Scroll-bar hit testing */
58 enum SCROLL_HITTEST
59 {
60 SCROLL_NOWHERE, /* Outside the scroll bar */
61 SCROLL_TOP_ARROW, /* Top or left arrow */
62 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
63 SCROLL_THUMB, /* Thumb rectangle */
64 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
65 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
66 };
67
68 /* What to do after SCROLL_SetScrollInfo() */
69 #define SA_SSI_HIDE 0x0001
70 #define SA_SSI_SHOW 0x0002
71 #define SA_SSI_REFRESH 0x0004
72 #define SA_SSI_REPAINT_ARROWS 0x0008
73
74 /* Thumb-tracking info */
75 static HWND SCROLL_TrackingWin = 0;
76 static INT SCROLL_TrackingBar = 0;
77 static INT SCROLL_TrackingPos = 0;
78 static INT SCROLL_TrackingVal = 0;
79 /* Hit test code of the last button-down event */
80 static enum SCROLL_HITTEST SCROLL_trackHitTest;
81 static BOOL SCROLL_trackVertical;
82
83 /* Is the moving thumb being displayed? */
84 static BOOL SCROLL_MovingThumb = FALSE;
85
86 /* Local functions */
87 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
88 BOOL fShowH, BOOL fShowV );
89 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
90 const SCROLLINFO *info, INT *action );
91
92 /***********************************************************************
93 * SCROLL_LoadBitmaps
94 */
95 static void SCROLL_LoadBitmaps(void)
96 {
97 hUpArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
98 hDnArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
99 hLfArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
100 hRgArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
101 hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
102 hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
103 hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
104 hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
105 hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
106 hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
107 hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
108 hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
109 }
110
111
112 /***********************************************************************
113 * SCROLL_GetPtrScrollInfo
114 */
115 static SCROLLBAR_INFO *SCROLL_GetPtrScrollInfo( WND* wndPtr, INT nBar )
116 {
117 SCROLLBAR_INFO *infoPtr;
118
119 if (!wndPtr) return NULL;
120 switch(nBar)
121 {
122 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
123 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
124 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
125 default: return NULL;
126 }
127
128 if (!infoPtr) /* Create the info structure if needed */
129 {
130 if ((infoPtr = HeapAlloc( SystemHeap, 0, sizeof(SCROLLBAR_INFO) )))
131 {
132 infoPtr->MinVal = infoPtr->CurVal = infoPtr->Page = 0;
133 infoPtr->MaxVal = 100;
134 infoPtr->flags = ESB_ENABLE_BOTH;
135 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
136 else wndPtr->pVScroll = infoPtr;
137 }
138 if (!hUpArrow) SCROLL_LoadBitmaps();
139 }
140 return infoPtr;
141 }
142
143
144 /***********************************************************************
145 * SCROLL_GetScrollInfo
146 */
147 static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND hwnd, INT nBar )
148 {
149 SCROLLBAR_INFO *retvalue;
150 WND *wndPtr = WIN_FindWndPtr( hwnd );
151 retvalue = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
152 WIN_ReleaseWndPtr(wndPtr);
153 return retvalue;
154 }
155
156
157 /***********************************************************************
158 * SCROLL_GetScrollBarRect
159 *
160 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
161 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
162 * 'arrowSize' returns the width or height of an arrow (depending on
163 * the orientation of the scrollbar), 'thumbSize' returns the size of
164 * the thumb, and 'thumbPos' returns the position of the thumb
165 * relative to the left or to the top.
166 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
167 */
168 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
169 INT *arrowSize, INT *thumbSize,
170 INT *thumbPos )
171 {
172 INT pixels;
173 BOOL vertical;
174 WND *wndPtr = WIN_FindWndPtr( hwnd );
175
176 switch(nBar)
177 {
178 case SB_HORZ:
179 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
180 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
181 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
182 lprect->bottom = lprect->top + SYSMETRICS_CYHSCROLL;
183 if(wndPtr->dwStyle & WS_BORDER) {
184 lprect->left--;
185 lprect->right++;
186 } else if(wndPtr->dwStyle & WS_VSCROLL)
187 lprect->right++;
188 vertical = FALSE;
189 break;
190
191 case SB_VERT:
192 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
193 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
194 lprect->right = lprect->left + SYSMETRICS_CXVSCROLL;
195 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
196 if(wndPtr->dwStyle & WS_BORDER) {
197 lprect->top--;
198 lprect->bottom++;
199 } else if(wndPtr->dwStyle & WS_HSCROLL)
200 lprect->bottom++;
201 vertical = TRUE;
202 break;
203
204 case SB_CTL:
205 GetClientRect( hwnd, lprect );
206 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
207 break;
208
209 default:
210 WIN_ReleaseWndPtr(wndPtr);
211 return FALSE;
212 }
213
214 if (vertical) pixels = lprect->bottom - lprect->top;
215 else pixels = lprect->right - lprect->left;
216
217 if (pixels <= 2*SYSMETRICS_CXVSCROLL + SCROLL_MIN_RECT)
218 {
219 if (pixels > SCROLL_MIN_RECT)
220 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
221 else
222 *arrowSize = 0;
223 *thumbPos = *thumbSize = 0;
224 }
225 else
226 {
227 SCROLLBAR_INFO *info = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
228
229 *arrowSize = SYSMETRICS_CXVSCROLL;
230 pixels -= (2 * (SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP));
231
232 if (info->Page)
233 {
234 *thumbSize = pixels * info->Page / (info->MaxVal-info->MinVal+1);
235 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
236 }
237 else *thumbSize = SYSMETRICS_CXVSCROLL;
238
239 if (((pixels -= *thumbSize ) < 0) ||
240 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
241 {
242 /* Rectangle too small or scrollbar disabled -> no thumb */
243 *thumbPos = *thumbSize = 0;
244 }
245 else
246 {
247 INT max = info->MaxVal - MAX( info->Page-1, 0 );
248 if (info->MinVal >= max)
249 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
250 else
251 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
252 + pixels * (info->CurVal-info->MinVal) / (max - info->MinVal);
253 }
254 }
255 WIN_ReleaseWndPtr(wndPtr);
256 return vertical;
257 }
258
259
260 /***********************************************************************
261 * SCROLL_GetThumbVal
262 *
263 * Compute the current scroll position based on the thumb position in pixels
264 * from the top of the scroll-bar.
265 */
266 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
267 BOOL vertical, INT pos )
268 {
269 INT thumbSize;
270 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
271
272 if ((pixels -= 2*(SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
273 return infoPtr->MinVal;
274
275 if (infoPtr->Page)
276 {
277 thumbSize = pixels * infoPtr->Page/(infoPtr->MaxVal-infoPtr->MinVal+1);
278 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
279 }
280 else thumbSize = SYSMETRICS_CXVSCROLL;
281
282 if ((pixels -= thumbSize) <= 0) return infoPtr->MinVal;
283
284 pos = MAX( 0, pos - (SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP) );
285 if (pos > pixels) pos = pixels;
286
287 if (!infoPtr->Page) pos *= infoPtr->MaxVal - infoPtr->MinVal;
288 else pos *= infoPtr->MaxVal - infoPtr->MinVal - infoPtr->Page + 1;
289 return infoPtr->MinVal + ((pos + pixels / 2) / pixels);
290 }
291
292 /***********************************************************************
293 * SCROLL_PtInRectEx
294 */
295 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
296 {
297 RECT rect = *lpRect;
298
299 if (vertical)
300 {
301 rect.left -= lpRect->right - lpRect->left;
302 rect.right += lpRect->right - lpRect->left;
303 }
304 else
305 {
306 rect.top -= lpRect->bottom - lpRect->top;
307 rect.bottom += lpRect->bottom - lpRect->top;
308 }
309 return PtInRect( &rect, pt );
310 }
311
312 /***********************************************************************
313 * SCROLL_ClipPos
314 */
315 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
316 {
317 if( pt.x < lpRect->left )
318 pt.x = lpRect->left;
319 else
320 if( pt.x > lpRect->right )
321 pt.x = lpRect->right;
322
323 if( pt.y < lpRect->top )
324 pt.y = lpRect->top;
325 else
326 if( pt.y > lpRect->bottom )
327 pt.y = lpRect->bottom;
328
329 return pt;
330 }
331
332
333 /***********************************************************************
334 * SCROLL_HitTest
335 *
336 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
337 */
338 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
339 POINT pt, BOOL bDragging )
340 {
341 INT arrowSize, thumbSize, thumbPos;
342 RECT rect;
343
344 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
345 &arrowSize, &thumbSize, &thumbPos );
346
347 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
348 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
349
350 if (vertical)
351 {
352 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
353 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
354 if (!thumbPos) return SCROLL_TOP_RECT;
355 pt.y -= rect.top;
356 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
357 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
358 }
359 else /* horizontal */
360 {
361 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
362 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
363 if (!thumbPos) return SCROLL_TOP_RECT;
364 pt.x -= rect.left;
365 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
366 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
367 }
368 return SCROLL_THUMB;
369 }
370
371
372 /***********************************************************************
373 * SCROLL_DrawArrows
374 *
375 * Draw the scroll bar arrows.
376 */
377 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
378 RECT *rect, INT arrowSize, BOOL vertical,
379 BOOL top_pressed, BOOL bottom_pressed )
380 {
381 HDC hdcMem = CreateCompatibleDC( hdc );
382 HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
383 TOP_ARROW(infoPtr->flags, top_pressed)
384 : LEFT_ARROW(infoPtr->flags, top_pressed));
385
386 SetStretchBltMode( hdc, STRETCH_DELETESCANS );
387 StretchBlt( hdc, rect->left, rect->top,
388 vertical ? rect->right-rect->left : arrowSize,
389 vertical ? arrowSize : rect->bottom-rect->top,
390 hdcMem, 0, 0,
391 SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL,
392 SRCCOPY );
393
394 SelectObject( hdcMem, vertical ?
395 BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
396 : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
397 if (vertical)
398 StretchBlt( hdc, rect->left, rect->bottom - arrowSize,
399 rect->right - rect->left, arrowSize,
400 hdcMem, 0, 0,
401 SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL,
402 SRCCOPY );
403 else
404 StretchBlt( hdc, rect->right - arrowSize, rect->top,
405 arrowSize, rect->bottom - rect->top,
406 hdcMem, 0, 0,
407 SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL,
408 SRCCOPY );
409 SelectObject( hdcMem, hbmpPrev );
410 DeleteDC( hdcMem );
411 }
412
413
414 /***********************************************************************
415 * SCROLL_DrawMovingThumb
416 *
417 * Draw the moving thumb rectangle.
418 */
419 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
420 INT arrowSize, INT thumbSize )
421 {
422 RECT r = *rect;
423 if (vertical)
424 {
425 r.top += SCROLL_TrackingPos;
426 if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
427 r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
428 if (r.top + thumbSize >
429 rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
430 r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
431 - thumbSize;
432 r.bottom = r.top + thumbSize;
433 }
434 else
435 {
436 r.left += SCROLL_TrackingPos;
437 if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
438 r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
439 if (r.left + thumbSize >
440 rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
441 r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
442 - thumbSize;
443 r.right = r.left + thumbSize;
444 }
445 DrawFocusRect( hdc, &r );
446 SCROLL_MovingThumb = !SCROLL_MovingThumb;
447 }
448
449
450 /***********************************************************************
451 * SCROLL_DrawInterior
452 *
453 * Draw the scroll bar interior (everything except the arrows).
454 */
455 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
456 RECT *rect, INT arrowSize,
457 INT thumbSize, INT thumbPos,
458 UINT flags, BOOL vertical,
459 BOOL top_selected, BOOL bottom_selected )
460 {
461 RECT r;
462
463 /* Select the correct brush and pen */
464
465 SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
466 if ((flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
467 {
468 /* This ought to be the color of the parent window */
469 SelectObject( hdc, GetSysColorBrush(COLOR_WINDOW) );
470 }
471 else
472 {
473 if (nBar == SB_CTL) /* Only scrollbar controls send WM_CTLCOLOR */
474 {
475 HBRUSH hbrush = SendMessageA(GetParent(hwnd),
476 WM_CTLCOLORSCROLLBAR, hdc, hwnd );
477 SelectObject( hdc, hbrush );
478 }
479 else SelectObject( hdc, GetSysColorBrush(COLOR_SCROLLBAR) );
480 }
481
482 /* Calculate the scroll rectangle */
483
484 r = *rect;
485 if (vertical)
486 {
487 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
488 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
489 }
490 else
491 {
492 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
493 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
494 }
495
496 /* Draw the scroll bar frame */
497
498 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
499
500 /* Draw the scroll rectangles and thumb */
501
502 if (!thumbPos) /* No thumb to draw */
503 {
504 PatBlt( hdc, r.left+1, r.top+1, r.right - r.left - 2,
505 r.bottom - r.top - 2, PATCOPY );
506 return;
507 }
508
509 if (vertical)
510 {
511 PatBlt( hdc, r.left + 1, r.top + 1,
512 r.right - r.left - 2,
513 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - 1,
514 top_selected ? 0x0f0000 : PATCOPY );
515 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
516 PatBlt( hdc, r.left + 1, r.top + thumbSize,
517 r.right - r.left - 2,
518 r.bottom - r.top - thumbSize - 1,
519 bottom_selected ? 0x0f0000 : PATCOPY );
520 r.bottom = r.top + thumbSize;
521 }
522 else /* horizontal */
523 {
524 PatBlt( hdc, r.left + 1, r.top + 1,
525 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - 1,
526 r.bottom - r.top - 2,
527 top_selected ? 0x0f0000 : PATCOPY );
528 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
529 PatBlt( hdc, r.left + thumbSize, r.top + 1,
530 r.right - r.left - thumbSize - 1,
531 r.bottom - r.top - 2,
532 bottom_selected ? 0x0f0000 : PATCOPY );
533 r.right = r.left + thumbSize;
534 }
535
536 /* Draw the thumb */
537
538 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
539 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
540 r.top++, r.left++;
541 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
542 if (SCROLL_MovingThumb &&
543 (SCROLL_TrackingWin == hwnd) &&
544 (SCROLL_TrackingBar == nBar))
545 {
546 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
547 SCROLL_MovingThumb = TRUE;
548 }
549 }
550
551
552 /***********************************************************************
553 * SCROLL_DrawScrollBar
554 *
555 * Redraw the whole scrollbar.
556 */
557 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
558 BOOL arrows, BOOL interior )
559 {
560 INT arrowSize, thumbSize, thumbPos;
561 RECT rect;
562 BOOL vertical;
563 WND *wndPtr = WIN_FindWndPtr( hwnd );
564 SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
565
566 if (!wndPtr || !infoPtr ||
567 ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
568 ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
569 if (!WIN_IsWindowDrawable( wndPtr, FALSE )) goto END;
570
571 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
572 &arrowSize, &thumbSize, &thumbPos );
573
574 /* Draw the arrows */
575
576 if (arrows && arrowSize)
577 {
578 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
579 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
580 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
581 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
582 else
583 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
584 FALSE, FALSE );
585 }
586 if( interior )
587 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
588 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
589 END:
590 WIN_ReleaseWndPtr(wndPtr);
591 }
592
593
594 /***********************************************************************
595 * SCROLL_RefreshScrollBar
596 *
597 * Repaint the scroll bar interior after a SetScrollRange() or
598 * SetScrollPos() call.
599 */
600 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
601 BOOL arrows, BOOL interior )
602 {
603 HDC hdc = GetDCEx( hwnd, 0,
604 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
605 if (!hdc) return;
606
607 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
608 ReleaseDC( hwnd, hdc );
609 }
610
611
612 /***********************************************************************
613 * SCROLL_HandleKbdEvent
614 *
615 * Handle a keyboard event (only for SB_CTL scrollbars).
616 */
617 static void SCROLL_HandleKbdEvent( HWND hwnd, WPARAM wParam )
618 {
619 WND *wndPtr = WIN_FindWndPtr( hwnd );
620 WPARAM msg;
621
622 switch(wParam)
623 {
624 case VK_PRIOR: msg = SB_PAGEUP; break;
625 case VK_NEXT: msg = SB_PAGEDOWN; break;
626 case VK_HOME: msg = SB_TOP; break;
627 case VK_END: msg = SB_BOTTOM; break;
628 case VK_UP: msg = SB_LINEUP; break;
629 case VK_DOWN: msg = SB_LINEDOWN; break;
630 default:
631 WIN_ReleaseWndPtr(wndPtr);
632 return;
633 }
634 SendMessageA( GetParent(hwnd),
635 (wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
636 msg, hwnd );
637 WIN_ReleaseWndPtr(wndPtr);
638 }
639
640
641 /***********************************************************************
642 * SCROLL_HandleScrollEvent
643 *
644 * Handle a mouse or timer event for the scrollbar.
645 * 'pt' is the location of the mouse event in client (for SB_CTL) or
646 * windows coordinates.
647 */
648 void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
649 {
650 /* Previous mouse position for timer events */
651 static POINT prevPt;
652 /* Thumb position when tracking started. */
653 static UINT trackThumbPos;
654 /* Position in the scroll-bar of the last button-down event. */
655 static INT lastClickPos;
656 /* Position in the scroll-bar of the last mouse event. */
657 static INT lastMousePos;
658
659 enum SCROLL_HITTEST hittest;
660 HWND hwndOwner, hwndCtl;
661 BOOL vertical;
662 INT arrowSize, thumbSize, thumbPos;
663 RECT rect;
664 HDC hdc;
665
666 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
667 if (!infoPtr) return;
668 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
669 return;
670
671 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
672 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
673 &arrowSize, &thumbSize, &thumbPos );
674 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
675 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
676
677 switch(msg)
678 {
679 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
680 SCROLL_trackVertical = vertical;
681 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
682 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
683 lastMousePos = lastClickPos;
684 trackThumbPos = thumbPos;
685 prevPt = pt;
686 SetCapture( hwnd );
687 if (nBar == SB_CTL) SetFocus( hwnd );
688 break;
689
690 case WM_MOUSEMOVE:
691 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
692 prevPt = pt;
693 break;
694
695 case WM_LBUTTONUP:
696 hittest = SCROLL_NOWHERE;
697 ReleaseCapture();
698 break;
699
700 case WM_SYSTIMER:
701 pt = prevPt;
702 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
703 break;
704
705 default:
706 return; /* Should never happen */
707 }
708
709 TRACE(scroll, "Event: hwnd=%04x bar=%d msg=%x pt=%ld,%ld hit=%d\n",
710 hwnd, nBar, msg, pt.x, pt.y, hittest );
711
712 switch(SCROLL_trackHitTest)
713 {
714 case SCROLL_NOWHERE: /* No tracking in progress */
715 break;
716
717 case SCROLL_TOP_ARROW:
718 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
719 (hittest == SCROLL_trackHitTest), FALSE );
720 if (hittest == SCROLL_trackHitTest)
721 {
722 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
723 {
724 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
725 SB_LINEUP, hwndCtl );
726 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
727 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
728 (TIMERPROC)0 );
729 }
730 }
731 else KillSystemTimer( hwnd, SCROLL_TIMER );
732 break;
733
734 case SCROLL_TOP_RECT:
735 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
736 thumbPos, infoPtr->flags, vertical,
737 (hittest == SCROLL_trackHitTest), FALSE );
738 if (hittest == SCROLL_trackHitTest)
739 {
740 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
741 {
742 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
743 SB_PAGEUP, hwndCtl );
744 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
745 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
746 (TIMERPROC)0 );
747 }
748 }
749 else KillSystemTimer( hwnd, SCROLL_TIMER );
750 break;
751
752 case SCROLL_THUMB:
753 if (msg == WM_LBUTTONDOWN)
754 {
755 SCROLL_TrackingWin = hwnd;
756 SCROLL_TrackingBar = nBar;
757 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
758 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
759 }
760 else if (msg == WM_LBUTTONUP)
761 {
762 SCROLL_TrackingWin = 0;
763 SCROLL_MovingThumb = FALSE;
764 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
765 thumbPos, infoPtr->flags, vertical,
766 FALSE, FALSE );
767 }
768 else /* WM_MOUSEMOVE */
769 {
770 UINT pos;
771
772 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
773 else
774 {
775 pt = SCROLL_ClipPos( &rect, pt );
776 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
777 }
778 if (pos != lastMousePos)
779 {
780 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
781 arrowSize, thumbSize );
782 lastMousePos = pos;
783 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
784 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
785 vertical,
786 SCROLL_TrackingPos );
787 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
788 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
789 hwndCtl );
790 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
791 arrowSize, thumbSize );
792 }
793 }
794 break;
795
796 case SCROLL_BOTTOM_RECT:
797 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
798 thumbPos, infoPtr->flags, vertical,
799 FALSE, (hittest == SCROLL_trackHitTest) );
800 if (hittest == SCROLL_trackHitTest)
801 {
802 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
803 {
804 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
805 SB_PAGEDOWN, hwndCtl );
806 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
807 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
808 (TIMERPROC)0 );
809 }
810 }
811 else KillSystemTimer( hwnd, SCROLL_TIMER );
812 break;
813
814 case SCROLL_BOTTOM_ARROW:
815 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
816 FALSE, (hittest == SCROLL_trackHitTest) );
817 if (hittest == SCROLL_trackHitTest)
818 {
819 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
820 {
821 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
822 SB_LINEDOWN, hwndCtl );
823 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
824 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
825 (TIMERPROC)0 );
826 }
827 }
828 else KillSystemTimer( hwnd, SCROLL_TIMER );
829 break;
830 }
831
832 if (msg == WM_LBUTTONUP)
833 {
834 hittest = SCROLL_trackHitTest;
835 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
836
837 if (hittest == SCROLL_THUMB)
838 {
839 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
840 trackThumbPos + lastMousePos - lastClickPos );
841 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
842 MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl );
843 }
844 else
845 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
846 SB_ENDSCROLL, hwndCtl );
847 }
848
849 ReleaseDC( hwnd, hdc );
850 }
851
852
853 /***********************************************************************
854 * ScrollBarWndProc
855 */
856 LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam,
857 LPARAM lParam )
858 {
859 switch(message)
860 {
861 case WM_CREATE:
862 {
863 CREATESTRUCTA *lpCreat = (CREATESTRUCTA *)lParam;
864 if (lpCreat->style & SBS_SIZEBOX)
865 {
866 FIXME(scroll, "Unimplemented style SBS_SIZEBOX.\n" );
867 return 0;
868 }
869
870 if (lpCreat->style & SBS_VERT)
871 {
872 if (lpCreat->style & SBS_LEFTALIGN)
873 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
874 SYSMETRICS_CXVSCROLL+1, lpCreat->cy, FALSE );
875 else if (lpCreat->style & SBS_RIGHTALIGN)
876 MoveWindow( hwnd,
877 lpCreat->x+lpCreat->cx-SYSMETRICS_CXVSCROLL-1,
878 lpCreat->y,
879 SYSMETRICS_CXVSCROLL+1, lpCreat->cy, FALSE );
880 }
881 else /* SBS_HORZ */
882 {
883 if (lpCreat->style & SBS_TOPALIGN)
884 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
885 lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE );
886 else if (lpCreat->style & SBS_BOTTOMALIGN)
887 MoveWindow( hwnd,
888 lpCreat->x,
889 lpCreat->y+lpCreat->cy-SYSMETRICS_CYHSCROLL-1,
890 lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE );
891 }
892 }
893 if (!hUpArrow) SCROLL_LoadBitmaps();
894 TRACE(scroll, "ScrollBar creation, hwnd=%04x\n", hwnd );
895 return 0;
896
897 case WM_LBUTTONDOWN:
898 case WM_LBUTTONUP:
899 case WM_MOUSEMOVE:
900 case WM_SYSTIMER:
901 {
902 POINT pt;
903 CONV_POINT16TO32( (POINT16 *)&lParam, &pt );
904 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
905 }
906 break;
907
908 case WM_KEYDOWN:
909 SCROLL_HandleKbdEvent( hwnd, wParam );
910 break;
911
912 case WM_ERASEBKGND:
913 return 1;
914
915 case WM_GETDLGCODE:
916 return DLGC_WANTARROWS; /* Windows returns this value */
917
918 case WM_PAINT:
919 {
920 PAINTSTRUCT ps;
921 HDC hdc = BeginPaint( hwnd, &ps );
922 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
923 EndPaint( hwnd, &ps );
924 }
925 break;
926
927 case SBM_SETPOS16:
928 case SBM_SETPOS:
929 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
930
931 case SBM_GETPOS16:
932 case SBM_GETPOS:
933 return GetScrollPos( hwnd, SB_CTL );
934
935 case SBM_SETRANGE16:
936 SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
937 wParam /* FIXME: Is this correct? */ );
938 return 0;
939
940 case SBM_SETRANGE:
941 SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
942 return 0; /* FIXME: return previous position */
943
944 case SBM_GETRANGE16:
945 FIXME(scroll, "don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
946 return 0;
947
948 case SBM_GETRANGE:
949 GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
950 return 0;
951
952 case SBM_ENABLE_ARROWS16:
953 case SBM_ENABLE_ARROWS:
954 return EnableScrollBar( hwnd, SB_CTL, wParam );
955
956 case SBM_SETRANGEREDRAW:
957 SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
958 return 0; /* FIXME: return previous position */
959
960 case SBM_SETSCROLLINFO:
961 return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
962
963 case SBM_GETSCROLLINFO:
964 return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
965
966 case 0x00e5:
967 case 0x00e7:
968 case 0x00e8:
969 case 0x00eb:
970 case 0x00ec:
971 case 0x00ed:
972 case 0x00ee:
973 case 0x00ef:
974 ERR(scroll, "unknown Win32 msg %04x wp=%08x lp=%08lx\n",
975 message, wParam, lParam );
976 break;
977
978 default:
979 if (message >= WM_USER)
980 WARN(scroll, "unknown msg %04x wp=%04x lp=%08lx\n",
981 message, wParam, lParam );
982 return DefWindowProcA( hwnd, message, wParam, lParam );
983 }
984 return 0;
985 }
986
987
988 /*************************************************************************
989 * SetScrollInfo16 (USER.475)
990 */
991 INT16 WINAPI SetScrollInfo16( HWND16 hwnd, INT16 nBar, const SCROLLINFO *info,
992 BOOL16 bRedraw )
993 {
994 return (INT16)SetScrollInfo( hwnd, nBar, info, bRedraw );
995 }
996
997
998 /*************************************************************************
999 * SetScrollInfo32 (USER32.501)
1000 * SetScrollInfo32 can be used to set the position, upper bound,
1001 * lower bound, and page size of a scrollbar control.
1002 *
1003 * RETURNS
1004 * Scrollbar position
1005 *
1006 * NOTE
1007 * For 100 lines of text to be displayed in a window of 25 lines,
1008 * one would for instance use info->nMin=0, info->nMax=75
1009 * (corresponding to the 76 different positions of the window on
1010 * the text), and info->nPage=25.
1011 */
1012 INT WINAPI SetScrollInfo(
1013 HWND hwnd /* [I] Handle of window whose scrollbar will be affected */,
1014 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1015 const SCROLLINFO *info /* [I] Specifies what to change and new values */,
1016 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
1017 {
1018 INT action;
1019 INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1020
1021 if( action & SA_SSI_HIDE )
1022 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1023 else
1024 {
1025 if( action & SA_SSI_SHOW )
1026 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1027 return retVal; /* SetWindowPos() already did the painting */
1028
1029 if( bRedraw && (action & SA_SSI_REFRESH))
1030 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1031 else if( action & SA_SSI_REPAINT_ARROWS )
1032 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1033 }
1034 return retVal;
1035 }
1036
1037 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1038 const SCROLLINFO *info, INT *action )
1039 {
1040 /* Update the scrollbar state and set action flags according to
1041 * what has to be done graphics wise. */
1042
1043 SCROLLBAR_INFO *infoPtr;
1044 UINT new_flags;
1045
1046 dbg_decl_str(scroll, 256);
1047
1048 *action = 0;
1049
1050 if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
1051 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1052 if ((info->cbSize != sizeof(*info)) &&
1053 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1054
1055 /* Set the page size */
1056
1057 if (info->fMask & SIF_PAGE)
1058 {
1059 dsprintf(scroll, " page=%d", info->nPage );
1060 if( infoPtr->Page != info->nPage )
1061 {
1062 infoPtr->Page = info->nPage;
1063 *action |= SA_SSI_REFRESH;
1064 }
1065 }
1066
1067 /* Set the scroll pos */
1068
1069 if (info->fMask & SIF_POS)
1070 {
1071 dsprintf(scroll, " pos=%d", info->nPos );
1072 if( infoPtr->CurVal != info->nPos )
1073 {
1074 infoPtr->CurVal = info->nPos;
1075 *action |= SA_SSI_REFRESH;
1076 }
1077 }
1078
1079 /* Set the scroll range */
1080
1081 if (info->fMask & SIF_RANGE)
1082 {
1083 dsprintf(scroll, " min=%d max=%d", info->nMin, info->nMax );
1084
1085 /* Invalid range -> range is set to (0,0) */
1086 if ((info->nMin > info->nMax) ||
1087 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1088 {
1089 infoPtr->MinVal = 0;
1090 infoPtr->MaxVal = 0;
1091 }
1092 else
1093 {
1094 if( infoPtr->MinVal != info->nMin ||
1095 infoPtr->MaxVal != info->nMax )
1096 {
1097 *action |= SA_SSI_REFRESH;
1098 infoPtr->MinVal = info->nMin;
1099 infoPtr->MaxVal = info->nMax;
1100 }
1101 }
1102 }
1103
1104 TRACE(scroll, "hwnd=%04x bar=%d %s\n",
1105 hwnd, nBar, dbg_str(scroll));
1106
1107 /* Make sure the page size is valid */
1108
1109 if (infoPtr->Page < 0) infoPtr->Page = 0;
1110 else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 )
1111 infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1;
1112
1113 /* Make sure the pos is inside the range */
1114
1115 if (infoPtr->CurVal < infoPtr->MinVal)
1116 infoPtr->CurVal = infoPtr->MinVal;
1117 else if (infoPtr->CurVal > infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1118 infoPtr->CurVal = infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 );
1119
1120 TRACE(scroll, " new values: page=%d pos=%d min=%d max=%d\n",
1121 infoPtr->Page, infoPtr->CurVal,
1122 infoPtr->MinVal, infoPtr->MaxVal );
1123
1124 /* Check if the scrollbar should be hidden or disabled */
1125
1126 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1127 {
1128 new_flags = infoPtr->flags;
1129 if (infoPtr->MinVal >= infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1130 {
1131 /* Hide or disable scroll-bar */
1132 if (info->fMask & SIF_DISABLENOSCROLL)
1133 {
1134 new_flags = ESB_DISABLE_BOTH;
1135 *action |= SA_SSI_REFRESH;
1136 }
1137 else if (nBar != SB_CTL)
1138 {
1139 *action = SA_SSI_HIDE;
1140 goto done;
1141 }
1142 }
1143 else /* Show and enable scroll-bar */
1144 {
1145 new_flags = 0;
1146 if (nBar != SB_CTL)
1147 *action |= SA_SSI_SHOW;
1148 }
1149
1150 if (infoPtr->flags != new_flags) /* check arrow flags */
1151 {
1152 infoPtr->flags = new_flags;
1153 *action |= SA_SSI_REPAINT_ARROWS;
1154 }
1155 }
1156
1157 done:
1158 /* Return current position */
1159
1160 return infoPtr->CurVal;
1161 }
1162
1163
1164 /*************************************************************************
1165 * GetScrollInfo16 (USER.476)
1166 */
1167 BOOL16 WINAPI GetScrollInfo16( HWND16 hwnd, INT16 nBar, LPSCROLLINFO info )
1168 {
1169 return GetScrollInfo( hwnd, nBar, info );
1170 }
1171
1172
1173 /*************************************************************************
1174 * GetScrollInfo32 (USER32.284)
1175 * GetScrollInfo32 can be used to retrieve the position, upper bound,
1176 * lower bound, and page size of a scrollbar control.
1177 *
1178 * RETURNS STD
1179 */
1180 BOOL WINAPI GetScrollInfo(
1181 HWND hwnd /* [I] Handle of window */ ,
1182 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1183 LPSCROLLINFO info /* [IO] (info.fMask [I] specifies which values are to retrieve) */)
1184 {
1185 SCROLLBAR_INFO *infoPtr;
1186
1187 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1188 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1189 if ((info->cbSize != sizeof(*info)) &&
1190 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1191
1192 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page;
1193 if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal;
1194 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1195 info->nTrackPos = (SCROLL_TrackingWin==hwnd) ? SCROLL_TrackingVal : 0;
1196 if (info->fMask & SIF_RANGE)
1197 {
1198 info->nMin = infoPtr->MinVal;
1199 info->nMax = infoPtr->MaxVal;
1200 }
1201 return (info->fMask & SIF_ALL) != 0;
1202 }
1203
1204
1205 /*************************************************************************
1206 * SetScrollPos16 (USER.62)
1207 */
1208 INT16 WINAPI SetScrollPos16( HWND16 hwnd, INT16 nBar, INT16 nPos,
1209 BOOL16 bRedraw )
1210 {
1211 return (INT16)SetScrollPos( hwnd, nBar, nPos, bRedraw );
1212 }
1213
1214
1215 /*************************************************************************
1216 * SetScrollPos32 (USER32.502)
1217 *
1218 * RETURNS
1219 * Success: Scrollbar position
1220 * Failure: 0
1221 *
1222 * REMARKS
1223 * Note the ambiguity when 0 is returned. Use GetLastError
1224 * to make sure there was an error (and to know which one).
1225 */
1226 INT WINAPI SetScrollPos(
1227 HWND hwnd /* [I] Handle of window whose scrollbar will be affected */,
1228 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1229 INT nPos /* [I] New value */,
1230 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */ )
1231 {
1232 SCROLLINFO info;
1233 SCROLLBAR_INFO *infoPtr;
1234 INT oldPos;
1235
1236 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1237 oldPos = infoPtr->CurVal;
1238 info.cbSize = sizeof(info);
1239 info.nPos = nPos;
1240 info.fMask = SIF_POS;
1241 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1242 return oldPos;
1243 }
1244
1245
1246 /*************************************************************************
1247 * GetScrollPos16 (USER.63)
1248 */
1249 INT16 WINAPI GetScrollPos16( HWND16 hwnd, INT16 nBar )
1250 {
1251 return (INT16)GetScrollPos( hwnd, nBar );
1252 }
1253
1254
1255 /*************************************************************************
1256 * GetScrollPos32 (USER32.285)
1257 *
1258 * RETURNS
1259 * Success: Current position
1260 * Failure: 0
1261 *
1262 * REMARKS
1263 * Note the ambiguity when 0 is returned. Use GetLastError
1264 * to make sure there was an error (and to know which one).
1265 */
1266 INT WINAPI GetScrollPos(
1267 HWND hwnd, /* [I] Handle of window */
1268 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */)
1269 {
1270 SCROLLBAR_INFO *infoPtr;
1271
1272 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1273 return infoPtr->CurVal;
1274 }
1275
1276
1277 /*************************************************************************
1278 * SetScrollRange16 (USER.64)
1279 */
1280 void WINAPI SetScrollRange16( HWND16 hwnd, INT16 nBar,
1281 INT16 MinVal, INT16 MaxVal, BOOL16 bRedraw )
1282 {
1283 /* Invalid range -> range is set to (0,0) */
1284 if ((INT)MaxVal - (INT)MinVal > 0x7fff) MinVal = MaxVal = 0;
1285 SetScrollRange( hwnd, nBar, MinVal, MaxVal, bRedraw );
1286 }
1287
1288
1289 /*************************************************************************
1290 * SetScrollRange32 (USER32.503)
1291 *
1292 * RETURNS STD
1293 */
1294 BOOL WINAPI SetScrollRange(
1295 HWND hwnd, /* [I] Handle of window whose scrollbar will be affected */
1296 INT nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
1297 INT MinVal, /* [I] New minimum value */
1298 INT MaxVal, /* [I] New maximum value */
1299 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
1300 {
1301 SCROLLINFO info;
1302
1303 info.cbSize = sizeof(info);
1304 info.nMin = MinVal;
1305 info.nMax = MaxVal;
1306 info.fMask = SIF_RANGE;
1307 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1308 return TRUE;
1309 }
1310
1311
1312 /*************************************************************************
1313 * SCROLL_SetNCSbState
1314 *
1315 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1316 */
1317 INT SCROLL_SetNCSbState(WND* wndPtr, int vMin, int vMax, int vPos,
1318 int hMin, int hMax, int hPos)
1319 {
1320 INT vA, hA;
1321 SCROLLINFO vInfo, hInfo;
1322
1323 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1324 vInfo.nMin = vMin; hInfo.nMin = hMin;
1325 vInfo.nMax = vMax; hInfo.nMax = hMax;
1326 vInfo.nPos = vPos; hInfo.nPos = hPos;
1327 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1328
1329 SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_VERT, &vInfo, &vA );
1330 SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_HORZ, &hInfo, &hA );
1331
1332 if( !SCROLL_ShowScrollBar( wndPtr->hwndSelf, SB_BOTH,
1333 (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1334 {
1335 /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1336 if( vA & SA_SSI_REFRESH )
1337 SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_VERT, FALSE, TRUE );
1338
1339 if( hA & SA_SSI_REFRESH )
1340 SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_HORZ, FALSE, TRUE );
1341 }
1342 return 0;
1343 }
1344
1345
1346 /*************************************************************************
1347 * GetScrollRange16 (USER.65)
1348 */
1349 BOOL16 WINAPI GetScrollRange16( HWND16 hwnd, INT16 nBar,
1350 LPINT16 lpMin, LPINT16 lpMax)
1351 {
1352 INT min, max;
1353 BOOL16 ret = GetScrollRange( hwnd, nBar, &min, &max );
1354 if (lpMin) *lpMin = min;
1355 if (lpMax) *lpMax = max;
1356 return ret;
1357 }
1358
1359
1360 /*************************************************************************
1361 * GetScrollRange32 (USER32.286)
1362 *
1363 * RETURNS STD
1364 */
1365 BOOL WINAPI GetScrollRange(
1366 HWND hwnd, /* [I] Handle of window */
1367 INT nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
1368 LPINT lpMin, /* [O] Where to store minimum value */
1369 LPINT lpMax /* [O] Where to store maximum value */)
1370 {
1371 SCROLLBAR_INFO *infoPtr;
1372
1373 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1374 {
1375 if (lpMin) lpMin = 0;
1376 if (lpMax) lpMax = 0;
1377 return FALSE;
1378 }
1379 if (lpMin) *lpMin = infoPtr->MinVal;
1380 if (lpMax) *lpMax = infoPtr->MaxVal;
1381 return TRUE;
1382 }
1383
1384
1385 /*************************************************************************
1386 * SCROLL_ShowScrollBar()
1387 *
1388 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1389 * NOTE: fShowV/fShowH must be zero when nBar is SB_HORZ/SB_VERT.
1390 */
1391 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1392 BOOL fShowH, BOOL fShowV )
1393 {
1394 WND *wndPtr = WIN_FindWndPtr( hwnd );
1395 BOOL retvalue = FALSE;
1396
1397 if (!wndPtr) return FALSE;
1398 TRACE(scroll, "hwnd=%04x bar=%d horz=%d, vert=%d\n",
1399 hwnd, nBar, fShowH, fShowV );
1400
1401 switch(nBar)
1402 {
1403 case SB_CTL:
1404 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1405 retvalue = TRUE;
1406 goto END;
1407
1408 case SB_BOTH:
1409 case SB_HORZ:
1410 if (fShowH)
1411 {
1412 fShowH = !(wndPtr->dwStyle & WS_HSCROLL);
1413 wndPtr->dwStyle |= WS_HSCROLL;
1414 }
1415 else /* hide it */
1416 {
1417 fShowH = (wndPtr->dwStyle & WS_HSCROLL);
1418 wndPtr->dwStyle &= ~WS_HSCROLL;
1419 }
1420 if( nBar == SB_HORZ ) break;
1421 /* fall through */
1422
1423 case SB_VERT:
1424 if (fShowV)
1425 {
1426 fShowV = !(wndPtr->dwStyle & WS_VSCROLL);
1427 wndPtr->dwStyle |= WS_VSCROLL;
1428 }
1429 else /* hide it */
1430 {
1431 fShowV = (wndPtr->dwStyle & WS_VSCROLL);
1432 wndPtr->dwStyle &= ~WS_VSCROLL;
1433 }
1434 break;
1435
1436 default:
1437 retvalue = FALSE; /* Nothing to do! */
1438 goto END;
1439 }
1440
1441 if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1442 {
1443 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1444 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1445 retvalue = TRUE;
1446 goto END;
1447 }
1448
1449 retvalue = FALSE; /* no frame changes */
1450 END:
1451 WIN_ReleaseWndPtr(wndPtr);
1452 return retvalue;
1453 }
1454
1455
1456 /*************************************************************************
1457 * ShowScrollBar16 (USER.267)
1458 */
1459 void WINAPI ShowScrollBar16( HWND16 hwnd, INT16 nBar, BOOL16 fShow )
1460 {
1461 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1462 (nBar == SB_HORZ) ? 0 : fShow );
1463 }
1464
1465
1466 /*************************************************************************
1467 * ShowScrollBar32 (USER32.532)
1468 *
1469 * RETURNS STD
1470 */
1471 BOOL WINAPI ShowScrollBar(
1472 HWND hwnd, /* [I] Handle of window whose scrollbar(s) will be affected */
1473 INT nBar, /* [I] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1474 BOOL fShow /* [I] TRUE = show, FALSE = hide */)
1475 {
1476 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1477 (nBar == SB_HORZ) ? 0 : fShow );
1478 return TRUE;
1479 }
1480
1481
1482 /*************************************************************************
1483 * EnableScrollBar16 (USER.482)
1484 */
1485 BOOL16 WINAPI EnableScrollBar16( HWND16 hwnd, INT16 nBar, UINT16 flags )
1486 {
1487 return EnableScrollBar( hwnd, nBar, flags );
1488 }
1489
1490
1491 /*************************************************************************
1492 * EnableScrollBar32 (USER32.171)
1493 */
1494 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1495 {
1496 BOOL bFineWithMe;
1497 SCROLLBAR_INFO *infoPtr;
1498
1499 TRACE(scroll, "%04x %d %d\n", hwnd, nBar, flags );
1500
1501 flags &= ESB_DISABLE_BOTH;
1502
1503 if (nBar == SB_BOTH)
1504 {
1505 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE;
1506 if (!(bFineWithMe = (infoPtr->flags == flags)) )
1507 {
1508 infoPtr->flags = flags;
1509 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1510 }
1511 nBar = SB_HORZ;
1512 }
1513 else
1514 bFineWithMe = TRUE;
1515
1516 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1517 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1518 infoPtr->flags = flags;
1519
1520 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1521 return TRUE;
1522 }
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