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Converted to the new debug interface, using script written by Patrik
[wine/multimedia.git] / controls / scroll.c
blob56b592863a62e9387683e06684d80bc578a47371
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 "debugtools.h"
14
15 DEFAULT_DEBUG_CHANNEL(scroll)
16
17
18 static HBITMAP hUpArrow = 0;
19 static HBITMAP hDnArrow = 0;
20 static HBITMAP hLfArrow = 0;
21 static HBITMAP hRgArrow = 0;
22 static HBITMAP hUpArrowD = 0;
23 static HBITMAP hDnArrowD = 0;
24 static HBITMAP hLfArrowD = 0;
25 static HBITMAP hRgArrowD = 0;
26 static HBITMAP hUpArrowI = 0;
27 static HBITMAP hDnArrowI = 0;
28 static HBITMAP hLfArrowI = 0;
29 static HBITMAP hRgArrowI = 0;
30
31 #define TOP_ARROW(flags,pressed) \
32 (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
33 #define BOTTOM_ARROW(flags,pressed) \
34 (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
35 #define LEFT_ARROW(flags,pressed) \
36 (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
37 #define RIGHT_ARROW(flags,pressed) \
38 (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
39
40
41 /* Minimum size of the rectangle between the arrows */
42 #define SCROLL_MIN_RECT 4
43
44 /* Minimum size of the thumb in pixels */
45 #define SCROLL_MIN_THUMB 6
46
47 /* Overlap between arrows and thumb */
48 #define SCROLL_ARROW_THUMB_OVERLAP 1
49
50 /* Delay (in ms) before first repetition when holding the button down */
51 #define SCROLL_FIRST_DELAY 200
52
53 /* Delay (in ms) between scroll repetitions */
54 #define SCROLL_REPEAT_DELAY 50
55
56 /* Scroll timer id */
57 #define SCROLL_TIMER 0
58
59 /* Scroll-bar hit testing */
60 enum SCROLL_HITTEST
61 {
62 SCROLL_NOWHERE, /* Outside the scroll bar */
63 SCROLL_TOP_ARROW, /* Top or left arrow */
64 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
65 SCROLL_THUMB, /* Thumb rectangle */
66 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
67 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
68 };
69
70 /* What to do after SCROLL_SetScrollInfo() */
71 #define SA_SSI_HIDE 0x0001
72 #define SA_SSI_SHOW 0x0002
73 #define SA_SSI_REFRESH 0x0004
74 #define SA_SSI_REPAINT_ARROWS 0x0008
75
76 /* Thumb-tracking info */
77 static HWND SCROLL_TrackingWin = 0;
78 static INT SCROLL_TrackingBar = 0;
79 static INT SCROLL_TrackingPos = 0;
80 static INT SCROLL_TrackingVal = 0;
81 /* Hit test code of the last button-down event */
82 static enum SCROLL_HITTEST SCROLL_trackHitTest;
83 static BOOL SCROLL_trackVertical;
84
85 /* Is the moving thumb being displayed? */
86 static BOOL SCROLL_MovingThumb = FALSE;
87
88 /* Local functions */
89 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
90 BOOL fShowH, BOOL fShowV );
91 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
92 const SCROLLINFO *info, INT *action );
93
94 /***********************************************************************
95 * SCROLL_LoadBitmaps
96 */
97 static void SCROLL_LoadBitmaps(void)
98 {
99 hUpArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
100 hDnArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
101 hLfArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
102 hRgArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
103 hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
104 hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
105 hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
106 hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
107 hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
108 hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
109 hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
110 hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
111 }
112
113
114 /***********************************************************************
115 * SCROLL_GetPtrScrollInfo
116 */
117 static SCROLLBAR_INFO *SCROLL_GetPtrScrollInfo( WND* wndPtr, INT nBar )
118 {
119 SCROLLBAR_INFO *infoPtr;
120
121 if (!wndPtr) return NULL;
122 switch(nBar)
123 {
124 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
125 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
126 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
127 default: return NULL;
128 }
129
130 if (!infoPtr) /* Create the info structure if needed */
131 {
132 if ((infoPtr = HeapAlloc( SystemHeap, 0, sizeof(SCROLLBAR_INFO) )))
133 {
134 infoPtr->MinVal = infoPtr->CurVal = infoPtr->Page = 0;
135 infoPtr->MaxVal = 100;
136 infoPtr->flags = ESB_ENABLE_BOTH;
137 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
138 else wndPtr->pVScroll = infoPtr;
139 }
140 if (!hUpArrow) SCROLL_LoadBitmaps();
141 }
142 return infoPtr;
143 }
144
145
146 /***********************************************************************
147 * SCROLL_GetScrollInfo
148 */
149 static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND hwnd, INT nBar )
150 {
151 SCROLLBAR_INFO *retvalue;
152 WND *wndPtr = WIN_FindWndPtr( hwnd );
153 retvalue = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
154 WIN_ReleaseWndPtr(wndPtr);
155 return retvalue;
156 }
157
158
159 /***********************************************************************
160 * SCROLL_GetScrollBarRect
161 *
162 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
163 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
164 * 'arrowSize' returns the width or height of an arrow (depending on
165 * the orientation of the scrollbar), 'thumbSize' returns the size of
166 * the thumb, and 'thumbPos' returns the position of the thumb
167 * relative to the left or to the top.
168 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
169 */
170 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
171 INT *arrowSize, INT *thumbSize,
172 INT *thumbPos )
173 {
174 INT pixels;
175 BOOL vertical;
176 WND *wndPtr = WIN_FindWndPtr( hwnd );
177
178 switch(nBar)
179 {
180 case SB_HORZ:
181 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
182 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
183 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
184 lprect->bottom = lprect->top + SYSMETRICS_CYHSCROLL;
185 if(wndPtr->dwStyle & WS_BORDER) {
186 lprect->left--;
187 lprect->right++;
188 } else if(wndPtr->dwStyle & WS_VSCROLL)
189 lprect->right++;
190 vertical = FALSE;
191 break;
192
193 case SB_VERT:
194 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
195 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
196 lprect->right = lprect->left + SYSMETRICS_CXVSCROLL;
197 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
198 if(wndPtr->dwStyle & WS_BORDER) {
199 lprect->top--;
200 lprect->bottom++;
201 } else if(wndPtr->dwStyle & WS_HSCROLL)
202 lprect->bottom++;
203 vertical = TRUE;
204 break;
205
206 case SB_CTL:
207 GetClientRect( hwnd, lprect );
208 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
209 break;
210
211 default:
212 WIN_ReleaseWndPtr(wndPtr);
213 return FALSE;
214 }
215
216 if (vertical) pixels = lprect->bottom - lprect->top;
217 else pixels = lprect->right - lprect->left;
218
219 if (pixels <= 2*SYSMETRICS_CXVSCROLL + SCROLL_MIN_RECT)
220 {
221 if (pixels > SCROLL_MIN_RECT)
222 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
223 else
224 *arrowSize = 0;
225 *thumbPos = *thumbSize = 0;
226 }
227 else
228 {
229 SCROLLBAR_INFO *info = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
230
231 *arrowSize = SYSMETRICS_CXVSCROLL;
232 pixels -= (2 * (SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP));
233
234 if (info->Page)
235 {
236 *thumbSize = pixels * info->Page / (info->MaxVal-info->MinVal+1);
237 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
238 }
239 else *thumbSize = SYSMETRICS_CXVSCROLL;
240
241 if (((pixels -= *thumbSize ) < 0) ||
242 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
243 {
244 /* Rectangle too small or scrollbar disabled -> no thumb */
245 *thumbPos = *thumbSize = 0;
246 }
247 else
248 {
249 INT max = info->MaxVal - MAX( info->Page-1, 0 );
250 if (info->MinVal >= max)
251 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
252 else
253 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
254 + pixels * (info->CurVal-info->MinVal) / (max - info->MinVal);
255 }
256 }
257 WIN_ReleaseWndPtr(wndPtr);
258 return vertical;
259 }
260
261
262 /***********************************************************************
263 * SCROLL_GetThumbVal
264 *
265 * Compute the current scroll position based on the thumb position in pixels
266 * from the top of the scroll-bar.
267 */
268 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
269 BOOL vertical, INT pos )
270 {
271 INT thumbSize;
272 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
273
274 if ((pixels -= 2*(SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
275 return infoPtr->MinVal;
276
277 if (infoPtr->Page)
278 {
279 thumbSize = pixels * infoPtr->Page/(infoPtr->MaxVal-infoPtr->MinVal+1);
280 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
281 }
282 else thumbSize = SYSMETRICS_CXVSCROLL;
283
284 if ((pixels -= thumbSize) <= 0) return infoPtr->MinVal;
285
286 pos = MAX( 0, pos - (SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP) );
287 if (pos > pixels) pos = pixels;
288
289 if (!infoPtr->Page) pos *= infoPtr->MaxVal - infoPtr->MinVal;
290 else pos *= infoPtr->MaxVal - infoPtr->MinVal - infoPtr->Page + 1;
291 return infoPtr->MinVal + ((pos + pixels / 2) / pixels);
292 }
293
294 /***********************************************************************
295 * SCROLL_PtInRectEx
296 */
297 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
298 {
299 RECT rect = *lpRect;
300
301 if (vertical)
302 {
303 rect.left -= lpRect->right - lpRect->left;
304 rect.right += lpRect->right - lpRect->left;
305 }
306 else
307 {
308 rect.top -= lpRect->bottom - lpRect->top;
309 rect.bottom += lpRect->bottom - lpRect->top;
310 }
311 return PtInRect( &rect, pt );
312 }
313
314 /***********************************************************************
315 * SCROLL_ClipPos
316 */
317 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
318 {
319 if( pt.x < lpRect->left )
320 pt.x = lpRect->left;
321 else
322 if( pt.x > lpRect->right )
323 pt.x = lpRect->right;
324
325 if( pt.y < lpRect->top )
326 pt.y = lpRect->top;
327 else
328 if( pt.y > lpRect->bottom )
329 pt.y = lpRect->bottom;
330
331 return pt;
332 }
333
334
335 /***********************************************************************
336 * SCROLL_HitTest
337 *
338 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
339 */
340 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
341 POINT pt, BOOL bDragging )
342 {
343 INT arrowSize, thumbSize, thumbPos;
344 RECT rect;
345
346 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
347 &arrowSize, &thumbSize, &thumbPos );
348
349 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
350 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
351
352 if (vertical)
353 {
354 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
355 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
356 if (!thumbPos) return SCROLL_TOP_RECT;
357 pt.y -= rect.top;
358 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
359 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
360 }
361 else /* horizontal */
362 {
363 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
364 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
365 if (!thumbPos) return SCROLL_TOP_RECT;
366 pt.x -= rect.left;
367 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
368 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
369 }
370 return SCROLL_THUMB;
371 }
372
373
374 /***********************************************************************
375 * SCROLL_DrawArrows
376 *
377 * Draw the scroll bar arrows.
378 */
379 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
380 RECT *rect, INT arrowSize, BOOL vertical,
381 BOOL top_pressed, BOOL bottom_pressed )
382 {
383 HDC hdcMem = CreateCompatibleDC( hdc );
384 HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
385 TOP_ARROW(infoPtr->flags, top_pressed)
386 : LEFT_ARROW(infoPtr->flags, top_pressed));
387
388 SetStretchBltMode( hdc, STRETCH_DELETESCANS );
389 StretchBlt( hdc, rect->left, rect->top,
390 vertical ? rect->right-rect->left : arrowSize,
391 vertical ? arrowSize : rect->bottom-rect->top,
392 hdcMem, 0, 0,
393 SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL,
394 SRCCOPY );
395
396 SelectObject( hdcMem, vertical ?
397 BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
398 : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
399 if (vertical)
400 StretchBlt( hdc, rect->left, rect->bottom - arrowSize,
401 rect->right - rect->left, arrowSize,
402 hdcMem, 0, 0,
403 SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL,
404 SRCCOPY );
405 else
406 StretchBlt( hdc, rect->right - arrowSize, rect->top,
407 arrowSize, rect->bottom - rect->top,
408 hdcMem, 0, 0,
409 SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL,
410 SRCCOPY );
411 SelectObject( hdcMem, hbmpPrev );
412 DeleteDC( hdcMem );
413 }
414
415
416 /***********************************************************************
417 * SCROLL_DrawMovingThumb
418 *
419 * Draw the moving thumb rectangle.
420 */
421 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
422 INT arrowSize, INT thumbSize )
423 {
424 RECT r = *rect;
425 if (vertical)
426 {
427 r.top += SCROLL_TrackingPos;
428 if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
429 r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
430 if (r.top + thumbSize >
431 rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
432 r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
433 - thumbSize;
434 r.bottom = r.top + thumbSize;
435 }
436 else
437 {
438 r.left += SCROLL_TrackingPos;
439 if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
440 r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
441 if (r.left + thumbSize >
442 rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
443 r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
444 - thumbSize;
445 r.right = r.left + thumbSize;
446 }
447 DrawFocusRect( hdc, &r );
448 SCROLL_MovingThumb = !SCROLL_MovingThumb;
449 }
450
451
452 /***********************************************************************
453 * SCROLL_DrawInterior
454 *
455 * Draw the scroll bar interior (everything except the arrows).
456 */
457 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
458 RECT *rect, INT arrowSize,
459 INT thumbSize, INT thumbPos,
460 UINT flags, BOOL vertical,
461 BOOL top_selected, BOOL bottom_selected )
462 {
463 RECT r;
464
465 /* Select the correct brush and pen */
466
467 SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
468 if ((flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
469 {
470 /* This ought to be the color of the parent window */
471 SelectObject( hdc, GetSysColorBrush(COLOR_WINDOW) );
472 }
473 else
474 {
475 if (nBar == SB_CTL) /* Only scrollbar controls send WM_CTLCOLOR */
476 {
477 HBRUSH hbrush = SendMessageA(GetParent(hwnd),
478 WM_CTLCOLORSCROLLBAR, hdc, hwnd );
479 SelectObject( hdc, hbrush );
480 }
481 else SelectObject( hdc, GetSysColorBrush(COLOR_SCROLLBAR) );
482 }
483
484 /* Calculate the scroll rectangle */
485
486 r = *rect;
487 if (vertical)
488 {
489 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
490 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
491 }
492 else
493 {
494 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
495 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
496 }
497
498 /* Draw the scroll bar frame */
499
500 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
501
502 /* Draw the scroll rectangles and thumb */
503
504 if (!thumbPos) /* No thumb to draw */
505 {
506 PatBlt( hdc, r.left+1, r.top+1, r.right - r.left - 2,
507 r.bottom - r.top - 2, PATCOPY );
508 return;
509 }
510
511 if (vertical)
512 {
513 PatBlt( hdc, r.left + 1, r.top + 1,
514 r.right - r.left - 2,
515 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - 1,
516 top_selected ? 0x0f0000 : PATCOPY );
517 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
518 PatBlt( hdc, r.left + 1, r.top + thumbSize,
519 r.right - r.left - 2,
520 r.bottom - r.top - thumbSize - 1,
521 bottom_selected ? 0x0f0000 : PATCOPY );
522 r.bottom = r.top + thumbSize;
523 }
524 else /* horizontal */
525 {
526 PatBlt( hdc, r.left + 1, r.top + 1,
527 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - 1,
528 r.bottom - r.top - 2,
529 top_selected ? 0x0f0000 : PATCOPY );
530 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
531 PatBlt( hdc, r.left + thumbSize, r.top + 1,
532 r.right - r.left - thumbSize - 1,
533 r.bottom - r.top - 2,
534 bottom_selected ? 0x0f0000 : PATCOPY );
535 r.right = r.left + thumbSize;
536 }
537
538 /* Draw the thumb */
539
540 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
541 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
542 r.top++, r.left++;
543 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
544 if (SCROLL_MovingThumb &&
545 (SCROLL_TrackingWin == hwnd) &&
546 (SCROLL_TrackingBar == nBar))
547 {
548 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
549 SCROLL_MovingThumb = TRUE;
550 }
551 }
552
553
554 /***********************************************************************
555 * SCROLL_DrawScrollBar
556 *
557 * Redraw the whole scrollbar.
558 */
559 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
560 BOOL arrows, BOOL interior )
561 {
562 INT arrowSize, thumbSize, thumbPos;
563 RECT rect;
564 BOOL vertical;
565 WND *wndPtr = WIN_FindWndPtr( hwnd );
566 SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
567
568 if (!wndPtr || !infoPtr ||
569 ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
570 ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
571 if (!WIN_IsWindowDrawable( wndPtr, FALSE )) goto END;
572
573 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
574 &arrowSize, &thumbSize, &thumbPos );
575
576 /* Draw the arrows */
577
578 if (arrows && arrowSize)
579 {
580 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
581 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
582 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
583 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
584 else
585 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
586 FALSE, FALSE );
587 }
588 if( interior )
589 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
590 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
591 END:
592 WIN_ReleaseWndPtr(wndPtr);
593 }
594
595
596 /***********************************************************************
597 * SCROLL_RefreshScrollBar
598 *
599 * Repaint the scroll bar interior after a SetScrollRange() or
600 * SetScrollPos() call.
601 */
602 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
603 BOOL arrows, BOOL interior )
604 {
605 HDC hdc = GetDCEx( hwnd, 0,
606 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
607 if (!hdc) return;
608
609 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
610 ReleaseDC( hwnd, hdc );
611 }
612
613
614 /***********************************************************************
615 * SCROLL_HandleKbdEvent
616 *
617 * Handle a keyboard event (only for SB_CTL scrollbars).
618 */
619 static void SCROLL_HandleKbdEvent( HWND hwnd, WPARAM wParam )
620 {
621 WND *wndPtr = WIN_FindWndPtr( hwnd );
622 WPARAM msg;
623
624 switch(wParam)
625 {
626 case VK_PRIOR: msg = SB_PAGEUP; break;
627 case VK_NEXT: msg = SB_PAGEDOWN; break;
628 case VK_HOME: msg = SB_TOP; break;
629 case VK_END: msg = SB_BOTTOM; break;
630 case VK_UP: msg = SB_LINEUP; break;
631 case VK_DOWN: msg = SB_LINEDOWN; break;
632 default:
633 WIN_ReleaseWndPtr(wndPtr);
634 return;
635 }
636 SendMessageA( GetParent(hwnd),
637 (wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
638 msg, hwnd );
639 WIN_ReleaseWndPtr(wndPtr);
640 }
641
642
643 /***********************************************************************
644 * SCROLL_HandleScrollEvent
645 *
646 * Handle a mouse or timer event for the scrollbar.
647 * 'pt' is the location of the mouse event in client (for SB_CTL) or
648 * windows coordinates.
649 */
650 void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
651 {
652 /* Previous mouse position for timer events */
653 static POINT prevPt;
654 /* Thumb position when tracking started. */
655 static UINT trackThumbPos;
656 /* Position in the scroll-bar of the last button-down event. */
657 static INT lastClickPos;
658 /* Position in the scroll-bar of the last mouse event. */
659 static INT lastMousePos;
660
661 enum SCROLL_HITTEST hittest;
662 HWND hwndOwner, hwndCtl;
663 BOOL vertical;
664 INT arrowSize, thumbSize, thumbPos;
665 RECT rect;
666 HDC hdc;
667
668 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
669 if (!infoPtr) return;
670 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
671 return;
672
673 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
674 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
675 &arrowSize, &thumbSize, &thumbPos );
676 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
677 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
678
679 switch(msg)
680 {
681 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
682 SCROLL_trackVertical = vertical;
683 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
684 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
685 lastMousePos = lastClickPos;
686 trackThumbPos = thumbPos;
687 prevPt = pt;
688 SetCapture( hwnd );
689 if (nBar == SB_CTL) SetFocus( hwnd );
690 break;
691
692 case WM_MOUSEMOVE:
693 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
694 prevPt = pt;
695 break;
696
697 case WM_LBUTTONUP:
698 hittest = SCROLL_NOWHERE;
699 ReleaseCapture();
700 break;
701
702 case WM_SYSTIMER:
703 pt = prevPt;
704 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
705 break;
706
707 default:
708 return; /* Should never happen */
709 }
710
711 TRACE("Event: hwnd=%04x bar=%d msg=%x pt=%ld,%ld hit=%d\n",
712 hwnd, nBar, msg, pt.x, pt.y, hittest );
713
714 switch(SCROLL_trackHitTest)
715 {
716 case SCROLL_NOWHERE: /* No tracking in progress */
717 break;
718
719 case SCROLL_TOP_ARROW:
720 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
721 (hittest == SCROLL_trackHitTest), FALSE );
722 if (hittest == SCROLL_trackHitTest)
723 {
724 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
725 {
726 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
727 SB_LINEUP, hwndCtl );
728 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
729 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
730 (TIMERPROC)0 );
731 }
732 }
733 else KillSystemTimer( hwnd, SCROLL_TIMER );
734 break;
735
736 case SCROLL_TOP_RECT:
737 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
738 thumbPos, infoPtr->flags, vertical,
739 (hittest == SCROLL_trackHitTest), FALSE );
740 if (hittest == SCROLL_trackHitTest)
741 {
742 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
743 {
744 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
745 SB_PAGEUP, hwndCtl );
746 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
747 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
748 (TIMERPROC)0 );
749 }
750 }
751 else KillSystemTimer( hwnd, SCROLL_TIMER );
752 break;
753
754 case SCROLL_THUMB:
755 if (msg == WM_LBUTTONDOWN)
756 {
757 SCROLL_TrackingWin = hwnd;
758 SCROLL_TrackingBar = nBar;
759 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
760 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
761 }
762 else if (msg == WM_LBUTTONUP)
763 {
764 SCROLL_TrackingWin = 0;
765 SCROLL_MovingThumb = FALSE;
766 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
767 thumbPos, infoPtr->flags, vertical,
768 FALSE, FALSE );
769 }
770 else /* WM_MOUSEMOVE */
771 {
772 UINT pos;
773
774 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
775 else
776 {
777 pt = SCROLL_ClipPos( &rect, pt );
778 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
779 }
780 if (pos != lastMousePos)
781 {
782 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
783 arrowSize, thumbSize );
784 lastMousePos = pos;
785 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
786 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
787 vertical,
788 SCROLL_TrackingPos );
789 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
790 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
791 hwndCtl );
792 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
793 arrowSize, thumbSize );
794 }
795 }
796 break;
797
798 case SCROLL_BOTTOM_RECT:
799 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
800 thumbPos, infoPtr->flags, vertical,
801 FALSE, (hittest == SCROLL_trackHitTest) );
802 if (hittest == SCROLL_trackHitTest)
803 {
804 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
805 {
806 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
807 SB_PAGEDOWN, hwndCtl );
808 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
809 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
810 (TIMERPROC)0 );
811 }
812 }
813 else KillSystemTimer( hwnd, SCROLL_TIMER );
814 break;
815
816 case SCROLL_BOTTOM_ARROW:
817 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
818 FALSE, (hittest == SCROLL_trackHitTest) );
819 if (hittest == SCROLL_trackHitTest)
820 {
821 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
822 {
823 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
824 SB_LINEDOWN, hwndCtl );
825 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
826 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
827 (TIMERPROC)0 );
828 }
829 }
830 else KillSystemTimer( hwnd, SCROLL_TIMER );
831 break;
832 }
833
834 if (msg == WM_LBUTTONUP)
835 {
836 hittest = SCROLL_trackHitTest;
837 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
838
839 if (hittest == SCROLL_THUMB)
840 {
841 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
842 trackThumbPos + lastMousePos - lastClickPos );
843 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
844 MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl );
845 }
846 else
847 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
848 SB_ENDSCROLL, hwndCtl );
849 }
850
851 ReleaseDC( hwnd, hdc );
852 }
853
854
855 /***********************************************************************
856 * ScrollBarWndProc
857 */
858 LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam,
859 LPARAM lParam )
860 {
861 switch(message)
862 {
863 case WM_CREATE:
864 {
865 CREATESTRUCTA *lpCreat = (CREATESTRUCTA *)lParam;
866 if (lpCreat->style & SBS_SIZEBOX)
867 {
868 FIXME("Unimplemented style SBS_SIZEBOX.\n" );
869 return 0;
870 }
871
872 if (lpCreat->style & SBS_VERT)
873 {
874 if (lpCreat->style & SBS_LEFTALIGN)
875 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
876 SYSMETRICS_CXVSCROLL+1, lpCreat->cy, FALSE );
877 else if (lpCreat->style & SBS_RIGHTALIGN)
878 MoveWindow( hwnd,
879 lpCreat->x+lpCreat->cx-SYSMETRICS_CXVSCROLL-1,
880 lpCreat->y,
881 SYSMETRICS_CXVSCROLL+1, lpCreat->cy, FALSE );
882 }
883 else /* SBS_HORZ */
884 {
885 if (lpCreat->style & SBS_TOPALIGN)
886 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
887 lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE );
888 else if (lpCreat->style & SBS_BOTTOMALIGN)
889 MoveWindow( hwnd,
890 lpCreat->x,
891 lpCreat->y+lpCreat->cy-SYSMETRICS_CYHSCROLL-1,
892 lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE );
893 }
894 }
895 if (!hUpArrow) SCROLL_LoadBitmaps();
896 TRACE("ScrollBar creation, hwnd=%04x\n", hwnd );
897 return 0;
898
899 case WM_LBUTTONDOWN:
900 case WM_LBUTTONUP:
901 case WM_MOUSEMOVE:
902 case WM_SYSTIMER:
903 {
904 POINT pt;
905 CONV_POINT16TO32( (POINT16 *)&lParam, &pt );
906 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
907 }
908 break;
909
910 case WM_KEYDOWN:
911 SCROLL_HandleKbdEvent( hwnd, wParam );
912 break;
913
914 case WM_ERASEBKGND:
915 return 1;
916
917 case WM_GETDLGCODE:
918 return DLGC_WANTARROWS; /* Windows returns this value */
919
920 case WM_PAINT:
921 {
922 PAINTSTRUCT ps;
923 HDC hdc = BeginPaint( hwnd, &ps );
924 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
925 EndPaint( hwnd, &ps );
926 }
927 break;
928
929 case SBM_SETPOS16:
930 case SBM_SETPOS:
931 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
932
933 case SBM_GETPOS16:
934 case SBM_GETPOS:
935 return GetScrollPos( hwnd, SB_CTL );
936
937 case SBM_SETRANGE16:
938 SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
939 wParam /* FIXME: Is this correct? */ );
940 return 0;
941
942 case SBM_SETRANGE:
943 SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
944 return 0; /* FIXME: return previous position */
945
946 case SBM_GETRANGE16:
947 FIXME("don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
948 return 0;
949
950 case SBM_GETRANGE:
951 GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
952 return 0;
953
954 case SBM_ENABLE_ARROWS16:
955 case SBM_ENABLE_ARROWS:
956 return EnableScrollBar( hwnd, SB_CTL, wParam );
957
958 case SBM_SETRANGEREDRAW:
959 SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
960 return 0; /* FIXME: return previous position */
961
962 case SBM_SETSCROLLINFO:
963 return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
964
965 case SBM_GETSCROLLINFO:
966 return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
967
968 case 0x00e5:
969 case 0x00e7:
970 case 0x00e8:
971 case 0x00eb:
972 case 0x00ec:
973 case 0x00ed:
974 case 0x00ee:
975 case 0x00ef:
976 ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
977 message, wParam, lParam );
978 break;
979
980 default:
981 if (message >= WM_USER)
982 WARN("unknown msg %04x wp=%04x lp=%08lx\n",
983 message, wParam, lParam );
984 return DefWindowProcA( hwnd, message, wParam, lParam );
985 }
986 return 0;
987 }
988
989
990 /*************************************************************************
991 * SetScrollInfo16 (USER.475)
992 */
993 INT16 WINAPI SetScrollInfo16( HWND16 hwnd, INT16 nBar, const SCROLLINFO *info,
994 BOOL16 bRedraw )
995 {
996 return (INT16)SetScrollInfo( hwnd, nBar, info, bRedraw );
997 }
998
999
1000 /*************************************************************************
1001 * SetScrollInfo32 (USER32.501)
1002 * SetScrollInfo32 can be used to set the position, upper bound,
1003 * lower bound, and page size of a scrollbar control.
1004 *
1005 * RETURNS
1006 * Scrollbar position
1007 *
1008 * NOTE
1009 * For 100 lines of text to be displayed in a window of 25 lines,
1010 * one would for instance use info->nMin=0, info->nMax=75
1011 * (corresponding to the 76 different positions of the window on
1012 * the text), and info->nPage=25.
1013 */
1014 INT WINAPI SetScrollInfo(
1015 HWND hwnd /* [I] Handle of window whose scrollbar will be affected */,
1016 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1017 const SCROLLINFO *info /* [I] Specifies what to change and new values */,
1018 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
1019 {
1020 INT action;
1021 INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1022
1023 if( action & SA_SSI_HIDE )
1024 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1025 else
1026 {
1027 if( action & SA_SSI_SHOW )
1028 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1029 return retVal; /* SetWindowPos() already did the painting */
1030
1031 if( bRedraw && (action & SA_SSI_REFRESH))
1032 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1033 else if( action & SA_SSI_REPAINT_ARROWS )
1034 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1035 }
1036 return retVal;
1037 }
1038
1039 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1040 const SCROLLINFO *info, INT *action )
1041 {
1042 /* Update the scrollbar state and set action flags according to
1043 * what has to be done graphics wise. */
1044
1045 SCROLLBAR_INFO *infoPtr;
1046 UINT new_flags;
1047
1048 dbg_decl_str(scroll, 256);
1049
1050 *action = 0;
1051
1052 if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
1053 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1054 if ((info->cbSize != sizeof(*info)) &&
1055 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1056
1057 /* Set the page size */
1058
1059 if (info->fMask & SIF_PAGE)
1060 {
1061 dsprintf(scroll, " page=%d", info->nPage );
1062 if( infoPtr->Page != info->nPage )
1063 {
1064 infoPtr->Page = info->nPage;
1065 *action |= SA_SSI_REFRESH;
1066 }
1067 }
1068
1069 /* Set the scroll pos */
1070
1071 if (info->fMask & SIF_POS)
1072 {
1073 dsprintf(scroll, " pos=%d", info->nPos );
1074 if( infoPtr->CurVal != info->nPos )
1075 {
1076 infoPtr->CurVal = info->nPos;
1077 *action |= SA_SSI_REFRESH;
1078 }
1079 }
1080
1081 /* Set the scroll range */
1082
1083 if (info->fMask & SIF_RANGE)
1084 {
1085 dsprintf(scroll, " min=%d max=%d", info->nMin, info->nMax );
1086
1087 /* Invalid range -> range is set to (0,0) */
1088 if ((info->nMin > info->nMax) ||
1089 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1090 {
1091 infoPtr->MinVal = 0;
1092 infoPtr->MaxVal = 0;
1093 }
1094 else
1095 {
1096 if( infoPtr->MinVal != info->nMin ||
1097 infoPtr->MaxVal != info->nMax )
1098 {
1099 *action |= SA_SSI_REFRESH;
1100 infoPtr->MinVal = info->nMin;
1101 infoPtr->MaxVal = info->nMax;
1102 }
1103 }
1104 }
1105
1106 TRACE("hwnd=%04x bar=%d %s\n",
1107 hwnd, nBar, dbg_str(scroll));
1108
1109 /* Make sure the page size is valid */
1110
1111 if (infoPtr->Page < 0) infoPtr->Page = 0;
1112 else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 )
1113 infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1;
1114
1115 /* Make sure the pos is inside the range */
1116
1117 if (infoPtr->CurVal < infoPtr->MinVal)
1118 infoPtr->CurVal = infoPtr->MinVal;
1119 else if (infoPtr->CurVal > infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1120 infoPtr->CurVal = infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 );
1121
1122 TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1123 infoPtr->Page, infoPtr->CurVal,
1124 infoPtr->MinVal, infoPtr->MaxVal );
1125
1126 /* Check if the scrollbar should be hidden or disabled */
1127
1128 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1129 {
1130 new_flags = infoPtr->flags;
1131 if (infoPtr->MinVal >= infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1132 {
1133 /* Hide or disable scroll-bar */
1134 if (info->fMask & SIF_DISABLENOSCROLL)
1135 {
1136 new_flags = ESB_DISABLE_BOTH;
1137 *action |= SA_SSI_REFRESH;
1138 }
1139 else if (nBar != SB_CTL)
1140 {
1141 *action = SA_SSI_HIDE;
1142 goto done;
1143 }
1144 }
1145 else /* Show and enable scroll-bar */
1146 {
1147 new_flags = 0;
1148 if (nBar != SB_CTL)
1149 *action |= SA_SSI_SHOW;
1150 }
1151
1152 if (infoPtr->flags != new_flags) /* check arrow flags */
1153 {
1154 infoPtr->flags = new_flags;
1155 *action |= SA_SSI_REPAINT_ARROWS;
1156 }
1157 }
1158
1159 done:
1160 /* Return current position */
1161
1162 return infoPtr->CurVal;
1163 }
1164
1165
1166 /*************************************************************************
1167 * GetScrollInfo16 (USER.476)
1168 */
1169 BOOL16 WINAPI GetScrollInfo16( HWND16 hwnd, INT16 nBar, LPSCROLLINFO info )
1170 {
1171 return GetScrollInfo( hwnd, nBar, info );
1172 }
1173
1174
1175 /*************************************************************************
1176 * GetScrollInfo32 (USER32.284)
1177 * GetScrollInfo32 can be used to retrieve the position, upper bound,
1178 * lower bound, and page size of a scrollbar control.
1179 *
1180 * RETURNS STD
1181 */
1182 BOOL WINAPI GetScrollInfo(
1183 HWND hwnd /* [I] Handle of window */ ,
1184 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1185 LPSCROLLINFO info /* [IO] (info.fMask [I] specifies which values are to retrieve) */)
1186 {
1187 SCROLLBAR_INFO *infoPtr;
1188
1189 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1190 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1191 if ((info->cbSize != sizeof(*info)) &&
1192 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1193
1194 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page;
1195 if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal;
1196 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1197 info->nTrackPos = (SCROLL_TrackingWin==hwnd) ? SCROLL_TrackingVal : 0;
1198 if (info->fMask & SIF_RANGE)
1199 {
1200 info->nMin = infoPtr->MinVal;
1201 info->nMax = infoPtr->MaxVal;
1202 }
1203 return (info->fMask & SIF_ALL) != 0;
1204 }
1205
1206
1207 /*************************************************************************
1208 * SetScrollPos16 (USER.62)
1209 */
1210 INT16 WINAPI SetScrollPos16( HWND16 hwnd, INT16 nBar, INT16 nPos,
1211 BOOL16 bRedraw )
1212 {
1213 return (INT16)SetScrollPos( hwnd, nBar, nPos, bRedraw );
1214 }
1215
1216
1217 /*************************************************************************
1218 * SetScrollPos32 (USER32.502)
1219 *
1220 * RETURNS
1221 * Success: Scrollbar position
1222 * Failure: 0
1223 *
1224 * REMARKS
1225 * Note the ambiguity when 0 is returned. Use GetLastError
1226 * to make sure there was an error (and to know which one).
1227 */
1228 INT WINAPI SetScrollPos(
1229 HWND hwnd /* [I] Handle of window whose scrollbar will be affected */,
1230 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1231 INT nPos /* [I] New value */,
1232 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */ )
1233 {
1234 SCROLLINFO info;
1235 SCROLLBAR_INFO *infoPtr;
1236 INT oldPos;
1237
1238 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1239 oldPos = infoPtr->CurVal;
1240 info.cbSize = sizeof(info);
1241 info.nPos = nPos;
1242 info.fMask = SIF_POS;
1243 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1244 return oldPos;
1245 }
1246
1247
1248 /*************************************************************************
1249 * GetScrollPos16 (USER.63)
1250 */
1251 INT16 WINAPI GetScrollPos16( HWND16 hwnd, INT16 nBar )
1252 {
1253 return (INT16)GetScrollPos( hwnd, nBar );
1254 }
1255
1256
1257 /*************************************************************************
1258 * GetScrollPos32 (USER32.285)
1259 *
1260 * RETURNS
1261 * Success: Current position
1262 * Failure: 0
1263 *
1264 * REMARKS
1265 * Note the ambiguity when 0 is returned. Use GetLastError
1266 * to make sure there was an error (and to know which one).
1267 */
1268 INT WINAPI GetScrollPos(
1269 HWND hwnd, /* [I] Handle of window */
1270 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */)
1271 {
1272 SCROLLBAR_INFO *infoPtr;
1273
1274 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1275 return infoPtr->CurVal;
1276 }
1277
1278
1279 /*************************************************************************
1280 * SetScrollRange16 (USER.64)
1281 */
1282 void WINAPI SetScrollRange16( HWND16 hwnd, INT16 nBar,
1283 INT16 MinVal, INT16 MaxVal, BOOL16 bRedraw )
1284 {
1285 /* Invalid range -> range is set to (0,0) */
1286 if ((INT)MaxVal - (INT)MinVal > 0x7fff) MinVal = MaxVal = 0;
1287 SetScrollRange( hwnd, nBar, MinVal, MaxVal, bRedraw );
1288 }
1289
1290
1291 /*************************************************************************
1292 * SetScrollRange32 (USER32.503)
1293 *
1294 * RETURNS STD
1295 */
1296 BOOL WINAPI SetScrollRange(
1297 HWND hwnd, /* [I] Handle of window whose scrollbar will be affected */
1298 INT nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
1299 INT MinVal, /* [I] New minimum value */
1300 INT MaxVal, /* [I] New maximum value */
1301 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
1302 {
1303 SCROLLINFO info;
1304
1305 info.cbSize = sizeof(info);
1306 info.nMin = MinVal;
1307 info.nMax = MaxVal;
1308 info.fMask = SIF_RANGE;
1309 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1310 return TRUE;
1311 }
1312
1313
1314 /*************************************************************************
1315 * SCROLL_SetNCSbState
1316 *
1317 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1318 */
1319 INT SCROLL_SetNCSbState(WND* wndPtr, int vMin, int vMax, int vPos,
1320 int hMin, int hMax, int hPos)
1321 {
1322 INT vA, hA;
1323 SCROLLINFO vInfo, hInfo;
1324
1325 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1326 vInfo.nMin = vMin; hInfo.nMin = hMin;
1327 vInfo.nMax = vMax; hInfo.nMax = hMax;
1328 vInfo.nPos = vPos; hInfo.nPos = hPos;
1329 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1330
1331 SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_VERT, &vInfo, &vA );
1332 SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_HORZ, &hInfo, &hA );
1333
1334 if( !SCROLL_ShowScrollBar( wndPtr->hwndSelf, SB_BOTH,
1335 (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1336 {
1337 /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1338 if( vA & SA_SSI_REFRESH )
1339 SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_VERT, FALSE, TRUE );
1340
1341 if( hA & SA_SSI_REFRESH )
1342 SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_HORZ, FALSE, TRUE );
1343 }
1344 return 0;
1345 }
1346
1347
1348 /*************************************************************************
1349 * GetScrollRange16 (USER.65)
1350 */
1351 BOOL16 WINAPI GetScrollRange16( HWND16 hwnd, INT16 nBar,
1352 LPINT16 lpMin, LPINT16 lpMax)
1353 {
1354 INT min, max;
1355 BOOL16 ret = GetScrollRange( hwnd, nBar, &min, &max );
1356 if (lpMin) *lpMin = min;
1357 if (lpMax) *lpMax = max;
1358 return ret;
1359 }
1360
1361
1362 /*************************************************************************
1363 * GetScrollRange32 (USER32.286)
1364 *
1365 * RETURNS STD
1366 */
1367 BOOL WINAPI GetScrollRange(
1368 HWND hwnd, /* [I] Handle of window */
1369 INT nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
1370 LPINT lpMin, /* [O] Where to store minimum value */
1371 LPINT lpMax /* [O] Where to store maximum value */)
1372 {
1373 SCROLLBAR_INFO *infoPtr;
1374
1375 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1376 {
1377 if (lpMin) lpMin = 0;
1378 if (lpMax) lpMax = 0;
1379 return FALSE;
1380 }
1381 if (lpMin) *lpMin = infoPtr->MinVal;
1382 if (lpMax) *lpMax = infoPtr->MaxVal;
1383 return TRUE;
1384 }
1385
1386
1387 /*************************************************************************
1388 * SCROLL_ShowScrollBar()
1389 *
1390 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1391 * NOTE: fShowV/fShowH must be zero when nBar is SB_HORZ/SB_VERT.
1392 */
1393 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1394 BOOL fShowH, BOOL fShowV )
1395 {
1396 WND *wndPtr = WIN_FindWndPtr( hwnd );
1397 BOOL retvalue = FALSE;
1398
1399 if (!wndPtr) return FALSE;
1400 TRACE("hwnd=%04x bar=%d horz=%d, vert=%d\n",
1401 hwnd, nBar, fShowH, fShowV );
1402
1403 switch(nBar)
1404 {
1405 case SB_CTL:
1406 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1407 retvalue = TRUE;
1408 goto END;
1409
1410 case SB_BOTH:
1411 case SB_HORZ:
1412 if (fShowH)
1413 {
1414 fShowH = !(wndPtr->dwStyle & WS_HSCROLL);
1415 wndPtr->dwStyle |= WS_HSCROLL;
1416 }
1417 else /* hide it */
1418 {
1419 fShowH = (wndPtr->dwStyle & WS_HSCROLL);
1420 wndPtr->dwStyle &= ~WS_HSCROLL;
1421 }
1422 if( nBar == SB_HORZ ) break;
1423 /* fall through */
1424
1425 case SB_VERT:
1426 if (fShowV)
1427 {
1428 fShowV = !(wndPtr->dwStyle & WS_VSCROLL);
1429 wndPtr->dwStyle |= WS_VSCROLL;
1430 }
1431 else /* hide it */
1432 {
1433 fShowV = (wndPtr->dwStyle & WS_VSCROLL);
1434 wndPtr->dwStyle &= ~WS_VSCROLL;
1435 }
1436 break;
1437
1438 default:
1439 retvalue = FALSE; /* Nothing to do! */
1440 goto END;
1441 }
1442
1443 if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1444 {
1445 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1446 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1447 retvalue = TRUE;
1448 goto END;
1449 }
1450
1451 retvalue = FALSE; /* no frame changes */
1452 END:
1453 WIN_ReleaseWndPtr(wndPtr);
1454 return retvalue;
1455 }
1456
1457
1458 /*************************************************************************
1459 * ShowScrollBar16 (USER.267)
1460 */
1461 void WINAPI ShowScrollBar16( HWND16 hwnd, INT16 nBar, BOOL16 fShow )
1462 {
1463 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1464 (nBar == SB_HORZ) ? 0 : fShow );
1465 }
1466
1467
1468 /*************************************************************************
1469 * ShowScrollBar32 (USER32.532)
1470 *
1471 * RETURNS STD
1472 */
1473 BOOL WINAPI ShowScrollBar(
1474 HWND hwnd, /* [I] Handle of window whose scrollbar(s) will be affected */
1475 INT nBar, /* [I] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1476 BOOL fShow /* [I] TRUE = show, FALSE = hide */)
1477 {
1478 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1479 (nBar == SB_HORZ) ? 0 : fShow );
1480 return TRUE;
1481 }
1482
1483
1484 /*************************************************************************
1485 * EnableScrollBar16 (USER.482)
1486 */
1487 BOOL16 WINAPI EnableScrollBar16( HWND16 hwnd, INT16 nBar, UINT16 flags )
1488 {
1489 return EnableScrollBar( hwnd, nBar, flags );
1490 }
1491
1492
1493 /*************************************************************************
1494 * EnableScrollBar32 (USER32.171)
1495 */
1496 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1497 {
1498 BOOL bFineWithMe;
1499 SCROLLBAR_INFO *infoPtr;
1500
1501 TRACE("%04x %d %d\n", hwnd, nBar, flags );
1502
1503 flags &= ESB_DISABLE_BOTH;
1504
1505 if (nBar == SB_BOTH)
1506 {
1507 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE;
1508 if (!(bFineWithMe = (infoPtr->flags == flags)) )
1509 {
1510 infoPtr->flags = flags;
1511 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1512 }
1513 nBar = SB_HORZ;
1514 }
1515 else
1516 bFineWithMe = TRUE;
1517
1518 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1519 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1520 infoPtr->flags = flags;
1521
1522 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1523 return TRUE;
1524 }
Maarten's multimedia branch