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Replace GRAPH_ functions with Win SDK equivalents.
[wine/multimedia.git] / controls / scroll.c
blob0ae3713f0e7fc58032d30e69c49e31ed0c3985df
1 /*
2 * Scrollbar control
3 *
4 * Copyright 1993 Martin Ayotte
5 * Copyright 1994, 1996 Alexandre Julliard
6 */
7
8 #include <stdlib.h>
9 #include <sys/types.h>
10 #include <sys/stat.h>
11 #include "windows.h"
12 #include "sysmetrics.h"
13 #include "scroll.h"
14 #include "heap.h"
15 #include "win.h"
16 #include "debug.h"
17
18
19 static HBITMAP32 hUpArrow = 0;
20 static HBITMAP32 hDnArrow = 0;
21 static HBITMAP32 hLfArrow = 0;
22 static HBITMAP32 hRgArrow = 0;
23 static HBITMAP32 hUpArrowD = 0;
24 static HBITMAP32 hDnArrowD = 0;
25 static HBITMAP32 hLfArrowD = 0;
26 static HBITMAP32 hRgArrowD = 0;
27 static HBITMAP32 hUpArrowI = 0;
28 static HBITMAP32 hDnArrowI = 0;
29 static HBITMAP32 hLfArrowI = 0;
30 static HBITMAP32 hRgArrowI = 0;
31
32 #define TOP_ARROW(flags,pressed) \
33 (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
34 #define BOTTOM_ARROW(flags,pressed) \
35 (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
36 #define LEFT_ARROW(flags,pressed) \
37 (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
38 #define RIGHT_ARROW(flags,pressed) \
39 (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
40
41
42 /* Minimum size of the rectangle between the arrows */
43 #define SCROLL_MIN_RECT 4
44
45 /* Minimum size of the thumb in pixels */
46 #define SCROLL_MIN_THUMB 6
47
48 /* Overlap between arrows and thumb */
49 #define SCROLL_ARROW_THUMB_OVERLAP 1
50
51 /* Delay (in ms) before first repetition when holding the button down */
52 #define SCROLL_FIRST_DELAY 200
53
54 /* Delay (in ms) between scroll repetitions */
55 #define SCROLL_REPEAT_DELAY 50
56
57 /* Scroll timer id */
58 #define SCROLL_TIMER 0
59
60 /* Scroll-bar hit testing */
61 enum SCROLL_HITTEST
62 {
63 SCROLL_NOWHERE, /* Outside the scroll bar */
64 SCROLL_TOP_ARROW, /* Top or left arrow */
65 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
66 SCROLL_THUMB, /* Thumb rectangle */
67 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
68 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
69 };
70
71 /* What to do after SCROLL_SetScrollInfo() */
72 #define SA_SSI_HIDE 0x0001
73 #define SA_SSI_SHOW 0x0002
74 #define SA_SSI_REFRESH 0x0004
75 #define SA_SSI_REPAINT_ARROWS 0x0008
76
77 /* Thumb-tracking info */
78 static HWND32 SCROLL_TrackingWin = 0;
79 static INT32 SCROLL_TrackingBar = 0;
80 static INT32 SCROLL_TrackingPos = 0;
81 static INT32 SCROLL_TrackingVal = 0;
82 /* Hit test code of the last button-down event */
83 static enum SCROLL_HITTEST SCROLL_trackHitTest;
84 static BOOL32 SCROLL_trackVertical;
85
86 /* Is the moving thumb being displayed? */
87 static BOOL32 SCROLL_MovingThumb = FALSE;
88
89 /* Local functions */
90 static BOOL32 SCROLL_ShowScrollBar( HWND32 hwnd, INT32 nBar,
91 BOOL32 fShowH, BOOL32 fShowV );
92 static INT32 SCROLL_SetScrollInfo( HWND32 hwnd, INT32 nBar,
93 const SCROLLINFO *info, INT32 *action );
94
95 /***********************************************************************
96 * SCROLL_LoadBitmaps
97 */
98 static void SCROLL_LoadBitmaps(void)
99 {
100 hUpArrow = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_UPARROW) );
101 hDnArrow = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_DNARROW) );
102 hLfArrow = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_LFARROW) );
103 hRgArrow = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_RGARROW) );
104 hUpArrowD = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_UPARROWD) );
105 hDnArrowD = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_DNARROWD) );
106 hLfArrowD = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_LFARROWD) );
107 hRgArrowD = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_RGARROWD) );
108 hUpArrowI = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_UPARROWI) );
109 hDnArrowI = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_DNARROWI) );
110 hLfArrowI = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_LFARROWI) );
111 hRgArrowI = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_RGARROWI) );
112 }
113
114
115 /***********************************************************************
116 * SCROLL_GetPtrScrollInfo
117 */
118 static SCROLLBAR_INFO *SCROLL_GetPtrScrollInfo( WND* wndPtr, INT32 nBar )
119 {
120 SCROLLBAR_INFO *infoPtr;
121
122 if (!wndPtr) return NULL;
123 switch(nBar)
124 {
125 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
126 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
127 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
128 default: return NULL;
129 }
130
131 if (!infoPtr) /* Create the info structure if needed */
132 {
133 if ((infoPtr = HeapAlloc( SystemHeap, 0, sizeof(SCROLLBAR_INFO) )))
134 {
135 infoPtr->MinVal = infoPtr->CurVal = infoPtr->Page = 0;
136 infoPtr->MaxVal = 100;
137 infoPtr->flags = ESB_ENABLE_BOTH;
138 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
139 else wndPtr->pVScroll = infoPtr;
140 }
141 if (!hUpArrow) SCROLL_LoadBitmaps();
142 }
143 return infoPtr;
144 }
145
146
147 /***********************************************************************
148 * SCROLL_GetScrollInfo
149 */
150 static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND32 hwnd, INT32 nBar )
151 {
152 WND *wndPtr = WIN_FindWndPtr( hwnd );
153 return SCROLL_GetPtrScrollInfo( wndPtr, nBar );
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 BOOL32 SCROLL_GetScrollBarRect( HWND32 hwnd, INT32 nBar, RECT32 *lprect,
169 INT32 *arrowSize, INT32 *thumbSize,
170 INT32 *thumbPos )
171 {
172 INT32 pixels;
173 BOOL32 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 GetClientRect32( hwnd, lprect );
206 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
207 break;
208
209 default:
210 return FALSE;
211 }
212
213 if (vertical) pixels = lprect->bottom - lprect->top;
214 else pixels = lprect->right - lprect->left;
215
216 if (pixels <= 2*SYSMETRICS_CXVSCROLL + SCROLL_MIN_RECT)
217 {
218 if (pixels > SCROLL_MIN_RECT)
219 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
220 else
221 *arrowSize = 0;
222 *thumbPos = *thumbSize = 0;
223 }
224 else
225 {
226 SCROLLBAR_INFO *info = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
227
228 *arrowSize = SYSMETRICS_CXVSCROLL;
229 pixels -= (2 * (SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP));
230
231 if (info->Page)
232 {
233 *thumbSize = pixels * info->Page / (info->MaxVal-info->MinVal+1);
234 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
235 }
236 else *thumbSize = SYSMETRICS_CXVSCROLL;
237
238 if (((pixels -= *thumbSize ) < 0) ||
239 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
240 {
241 /* Rectangle too small or scrollbar disabled -> no thumb */
242 *thumbPos = *thumbSize = 0;
243 }
244 else
245 {
246 INT32 max = info->MaxVal - MAX( info->Page-1, 0 );
247 if (info->MinVal >= max)
248 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
249 else
250 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
251 + pixels * (info->CurVal-info->MinVal) / (max - info->MinVal);
252 }
253 }
254 return vertical;
255 }
256
257
258 /***********************************************************************
259 * SCROLL_GetThumbVal
260 *
261 * Compute the current scroll position based on the thumb position in pixels
262 * from the top of the scroll-bar.
263 */
264 static UINT32 SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT32 *rect,
265 BOOL32 vertical, INT32 pos )
266 {
267 INT32 thumbSize;
268 INT32 pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
269
270 if ((pixels -= 2*(SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
271 return infoPtr->MinVal;
272
273 if (infoPtr->Page)
274 {
275 thumbSize = pixels * infoPtr->Page/(infoPtr->MaxVal-infoPtr->MinVal+1);
276 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
277 }
278 else thumbSize = SYSMETRICS_CXVSCROLL;
279
280 if ((pixels -= thumbSize) <= 0) return infoPtr->MinVal;
281
282 pos = MAX( 0, pos - (SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP) );
283 if (pos > pixels) pos = pixels;
284
285 if (!infoPtr->Page) pos *= infoPtr->MaxVal - infoPtr->MinVal;
286 else pos *= infoPtr->MaxVal - infoPtr->MinVal - infoPtr->Page + 1;
287 return infoPtr->MinVal + ((pos + pixels / 2) / pixels);
288 }
289
290 /***********************************************************************
291 * SCROLL_PtInRectEx
292 */
293 static BOOL32 SCROLL_PtInRectEx( LPRECT32 lpRect, POINT32 pt, BOOL32 vertical )
294 {
295 RECT32 rect = *lpRect;
296
297 if (vertical)
298 {
299 rect.left -= lpRect->right - lpRect->left;
300 rect.right += lpRect->right - lpRect->left;
301 }
302 else
303 {
304 rect.top -= lpRect->bottom - lpRect->top;
305 rect.bottom += lpRect->bottom - lpRect->top;
306 }
307 return PtInRect32( &rect, pt );
308 }
309
310 /***********************************************************************
311 * SCROLL_ClipPos
312 */
313 static POINT32 SCROLL_ClipPos( LPRECT32 lpRect, POINT32 pt )
314 {
315 if( pt.x < lpRect->left )
316 pt.x = lpRect->left;
317 else
318 if( pt.x > lpRect->right )
319 pt.x = lpRect->right;
320
321 if( pt.y < lpRect->top )
322 pt.y = lpRect->top;
323 else
324 if( pt.y > lpRect->bottom )
325 pt.y = lpRect->bottom;
326
327 return pt;
328 }
329
330
331 /***********************************************************************
332 * SCROLL_HitTest
333 *
334 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
335 */
336 static enum SCROLL_HITTEST SCROLL_HitTest( HWND32 hwnd, INT32 nBar,
337 POINT32 pt, BOOL32 bDragging )
338 {
339 INT32 arrowSize, thumbSize, thumbPos;
340 RECT32 rect;
341
342 BOOL32 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
343 &arrowSize, &thumbSize, &thumbPos );
344
345 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
346 (!PtInRect32( &rect, pt )) ) return SCROLL_NOWHERE;
347
348 if (vertical)
349 {
350 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
351 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
352 if (!thumbPos) return SCROLL_TOP_RECT;
353 pt.y -= rect.top;
354 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
355 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
356 }
357 else /* horizontal */
358 {
359 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
360 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
361 if (!thumbPos) return SCROLL_TOP_RECT;
362 pt.x -= rect.left;
363 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
364 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
365 }
366 return SCROLL_THUMB;
367 }
368
369
370 /***********************************************************************
371 * SCROLL_DrawArrows
372 *
373 * Draw the scroll bar arrows.
374 */
375 static void SCROLL_DrawArrows( HDC32 hdc, SCROLLBAR_INFO *infoPtr,
376 RECT32 *rect, INT32 arrowSize, BOOL32 vertical,
377 BOOL32 top_pressed, BOOL32 bottom_pressed )
378 {
379 HDC32 hdcMem = CreateCompatibleDC32( hdc );
380 HBITMAP32 hbmpPrev = SelectObject32( hdcMem, vertical ?
381 TOP_ARROW(infoPtr->flags, top_pressed)
382 : LEFT_ARROW(infoPtr->flags, top_pressed));
383
384 SetStretchBltMode32( hdc, STRETCH_DELETESCANS );
385 StretchBlt32( hdc, rect->left, rect->top,
386 vertical ? rect->right-rect->left : arrowSize,
387 vertical ? arrowSize : rect->bottom-rect->top,
388 hdcMem, 0, 0,
389 SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL,
390 SRCCOPY );
391
392 SelectObject32( hdcMem, vertical ?
393 BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
394 : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
395 if (vertical)
396 StretchBlt32( hdc, rect->left, rect->bottom - arrowSize,
397 rect->right - rect->left, arrowSize,
398 hdcMem, 0, 0,
399 SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL,
400 SRCCOPY );
401 else
402 StretchBlt32( hdc, rect->right - arrowSize, rect->top,
403 arrowSize, rect->bottom - rect->top,
404 hdcMem, 0, 0,
405 SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL,
406 SRCCOPY );
407 SelectObject32( hdcMem, hbmpPrev );
408 DeleteDC32( hdcMem );
409 }
410
411
412 /***********************************************************************
413 * SCROLL_DrawMovingThumb
414 *
415 * Draw the moving thumb rectangle.
416 */
417 static void SCROLL_DrawMovingThumb( HDC32 hdc, RECT32 *rect, BOOL32 vertical,
418 INT32 arrowSize, INT32 thumbSize )
419 {
420 RECT32 r = *rect;
421 if (vertical)
422 {
423 r.top += SCROLL_TrackingPos;
424 if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
425 r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
426 if (r.top + thumbSize >
427 rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
428 r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
429 - thumbSize;
430 r.bottom = r.top + thumbSize;
431 }
432 else
433 {
434 r.left += SCROLL_TrackingPos;
435 if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
436 r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
437 if (r.left + thumbSize >
438 rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
439 r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
440 - thumbSize;
441 r.right = r.left + thumbSize;
442 }
443 DrawFocusRect32( hdc, &r );
444 SCROLL_MovingThumb = !SCROLL_MovingThumb;
445 }
446
447
448 /***********************************************************************
449 * SCROLL_DrawInterior
450 *
451 * Draw the scroll bar interior (everything except the arrows).
452 */
453 static void SCROLL_DrawInterior( HWND32 hwnd, HDC32 hdc, INT32 nBar,
454 RECT32 *rect, INT32 arrowSize,
455 INT32 thumbSize, INT32 thumbPos,
456 UINT32 flags, BOOL32 vertical,
457 BOOL32 top_selected, BOOL32 bottom_selected )
458 {
459 RECT32 r;
460
461 /* Select the correct brush and pen */
462
463 SelectObject32( hdc, GetSysColorPen32(COLOR_WINDOWFRAME) );
464 if ((flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
465 {
466 /* This ought to be the color of the parent window */
467 SelectObject32( hdc, GetSysColorBrush32(COLOR_WINDOW) );
468 }
469 else
470 {
471 if (nBar == SB_CTL) /* Only scrollbar controls send WM_CTLCOLOR */
472 {
473 HBRUSH32 hbrush = SendMessage32A(GetParent32(hwnd),
474 WM_CTLCOLORSCROLLBAR, hdc, hwnd );
475 SelectObject32( hdc, hbrush );
476 }
477 else SelectObject32( hdc, GetSysColorBrush32(COLOR_SCROLLBAR) );
478 }
479
480 /* Calculate the scroll rectangle */
481
482 r = *rect;
483 if (vertical)
484 {
485 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
486 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
487 }
488 else
489 {
490 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
491 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
492 }
493
494 /* Draw the scroll bar frame */
495
496 Rectangle32( hdc, r.left, r.top, r.right, r.bottom );
497
498 /* Draw the scroll rectangles and thumb */
499
500 if (!thumbPos) /* No thumb to draw */
501 {
502 PatBlt32( hdc, r.left+1, r.top+1, r.right - r.left - 2,
503 r.bottom - r.top - 2, PATCOPY );
504 return;
505 }
506
507 if (vertical)
508 {
509 PatBlt32( hdc, r.left + 1, r.top + 1,
510 r.right - r.left - 2,
511 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - 1,
512 top_selected ? 0x0f0000 : PATCOPY );
513 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
514 PatBlt32( hdc, r.left + 1, r.top + thumbSize,
515 r.right - r.left - 2,
516 r.bottom - r.top - thumbSize - 1,
517 bottom_selected ? 0x0f0000 : PATCOPY );
518 r.bottom = r.top + thumbSize;
519 }
520 else /* horizontal */
521 {
522 PatBlt32( hdc, r.left + 1, r.top + 1,
523 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - 1,
524 r.bottom - r.top - 2,
525 top_selected ? 0x0f0000 : PATCOPY );
526 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
527 PatBlt32( hdc, r.left + thumbSize, r.top + 1,
528 r.right - r.left - thumbSize - 1,
529 r.bottom - r.top - 2,
530 bottom_selected ? 0x0f0000 : PATCOPY );
531 r.right = r.left + thumbSize;
532 }
533
534 /* Draw the thumb */
535
536 SelectObject32( hdc, GetSysColorBrush32(COLOR_BTNFACE) );
537 Rectangle32( hdc, r.left, r.top, r.right, r.bottom );
538 r.top++, r.left++;
539 DrawEdge32( hdc, &r, EDGE_RAISED, BF_RECT );
540 if (SCROLL_MovingThumb &&
541 (SCROLL_TrackingWin == hwnd) &&
542 (SCROLL_TrackingBar == nBar))
543 {
544 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
545 SCROLL_MovingThumb = TRUE;
546 }
547 }
548
549
550 /***********************************************************************
551 * SCROLL_DrawScrollBar
552 *
553 * Redraw the whole scrollbar.
554 */
555 void SCROLL_DrawScrollBar( HWND32 hwnd, HDC32 hdc, INT32 nBar,
556 BOOL32 arrows, BOOL32 interior )
557 {
558 INT32 arrowSize, thumbSize, thumbPos;
559 RECT32 rect;
560 BOOL32 vertical;
561 WND *wndPtr = WIN_FindWndPtr( hwnd );
562 SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
563
564 if (!wndPtr || !infoPtr ||
565 ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
566 ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) return;
567 if (!WIN_IsWindowDrawable( wndPtr, FALSE )) return;
568
569 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
570 &arrowSize, &thumbSize, &thumbPos );
571
572 /* Draw the arrows */
573
574 if (arrows && arrowSize)
575 {
576 if( vertical == SCROLL_trackVertical && GetCapture32() == hwnd )
577 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
578 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
579 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
580 else
581 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
582 FALSE, FALSE );
583 }
584 if( interior )
585 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
586 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
587 }
588
589
590 /***********************************************************************
591 * SCROLL_RefreshScrollBar
592 *
593 * Repaint the scroll bar interior after a SetScrollRange() or
594 * SetScrollPos() call.
595 */
596 static void SCROLL_RefreshScrollBar( HWND32 hwnd, INT32 nBar,
597 BOOL32 arrows, BOOL32 interior )
598 {
599 HDC32 hdc = GetDCEx32( hwnd, 0,
600 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
601 if (!hdc) return;
602
603 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
604 ReleaseDC32( hwnd, hdc );
605 }
606
607
608 /***********************************************************************
609 * SCROLL_HandleKbdEvent
610 *
611 * Handle a keyboard event (only for SB_CTL scrollbars).
612 */
613 static void SCROLL_HandleKbdEvent( HWND32 hwnd, WPARAM32 wParam )
614 {
615 WND *wndPtr = WIN_FindWndPtr( hwnd );
616 WPARAM32 msg;
617
618 switch(wParam)
619 {
620 case VK_PRIOR: msg = SB_PAGEUP; break;
621 case VK_NEXT: msg = SB_PAGEDOWN; break;
622 case VK_HOME: msg = SB_TOP; break;
623 case VK_END: msg = SB_BOTTOM; break;
624 case VK_UP: msg = SB_LINEUP; break;
625 case VK_DOWN: msg = SB_LINEDOWN; break;
626 default:
627 return;
628 }
629 SendMessage32A( GetParent32(hwnd),
630 (wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
631 msg, hwnd );
632 }
633
634
635 /***********************************************************************
636 * SCROLL_HandleScrollEvent
637 *
638 * Handle a mouse or timer event for the scrollbar.
639 * 'pt' is the location of the mouse event in client (for SB_CTL) or
640 * windows coordinates.
641 */
642 void SCROLL_HandleScrollEvent( HWND32 hwnd, INT32 nBar, UINT32 msg, POINT32 pt)
643 {
644 /* Previous mouse position for timer events */
645 static POINT32 prevPt;
646 /* Thumb position when tracking started. */
647 static UINT32 trackThumbPos;
648 /* Position in the scroll-bar of the last button-down event. */
649 static INT32 lastClickPos;
650 /* Position in the scroll-bar of the last mouse event. */
651 static INT32 lastMousePos;
652
653 enum SCROLL_HITTEST hittest;
654 HWND32 hwndOwner, hwndCtl;
655 BOOL32 vertical;
656 INT32 arrowSize, thumbSize, thumbPos;
657 RECT32 rect;
658 HDC32 hdc;
659
660 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
661 if (!infoPtr) return;
662 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
663 return;
664
665 hdc = GetDCEx32( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
666 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
667 &arrowSize, &thumbSize, &thumbPos );
668 hwndOwner = (nBar == SB_CTL) ? GetParent32(hwnd) : hwnd;
669 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
670
671 switch(msg)
672 {
673 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
674 SCROLL_trackVertical = vertical;
675 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
676 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
677 lastMousePos = lastClickPos;
678 trackThumbPos = thumbPos;
679 prevPt = pt;
680 SetCapture32( hwnd );
681 if (nBar == SB_CTL) SetFocus32( hwnd );
682 break;
683
684 case WM_MOUSEMOVE:
685 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
686 prevPt = pt;
687 break;
688
689 case WM_LBUTTONUP:
690 hittest = SCROLL_NOWHERE;
691 ReleaseCapture();
692 break;
693
694 case WM_SYSTIMER:
695 pt = prevPt;
696 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
697 break;
698
699 default:
700 return; /* Should never happen */
701 }
702
703 TRACE(scroll, "Event: hwnd=%04x bar=%d msg=%x pt=%d,%d hit=%d\n",
704 hwnd, nBar, msg, pt.x, pt.y, hittest );
705
706 switch(SCROLL_trackHitTest)
707 {
708 case SCROLL_NOWHERE: /* No tracking in progress */
709 break;
710
711 case SCROLL_TOP_ARROW:
712 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
713 (hittest == SCROLL_trackHitTest), FALSE );
714 if (hittest == SCROLL_trackHitTest)
715 {
716 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
717 {
718 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
719 SB_LINEUP, hwndCtl );
720 SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
721 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
722 (TIMERPROC32)0 );
723 }
724 }
725 else KillSystemTimer32( hwnd, SCROLL_TIMER );
726 break;
727
728 case SCROLL_TOP_RECT:
729 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
730 thumbPos, infoPtr->flags, vertical,
731 (hittest == SCROLL_trackHitTest), FALSE );
732 if (hittest == SCROLL_trackHitTest)
733 {
734 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
735 {
736 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
737 SB_PAGEUP, hwndCtl );
738 SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
739 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
740 (TIMERPROC32)0 );
741 }
742 }
743 else KillSystemTimer32( hwnd, SCROLL_TIMER );
744 break;
745
746 case SCROLL_THUMB:
747 if (msg == WM_LBUTTONDOWN)
748 {
749 SCROLL_TrackingWin = hwnd;
750 SCROLL_TrackingBar = nBar;
751 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
752 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
753 }
754 else if (msg == WM_LBUTTONUP)
755 {
756 SCROLL_TrackingWin = 0;
757 SCROLL_MovingThumb = FALSE;
758 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
759 thumbPos, infoPtr->flags, vertical,
760 FALSE, FALSE );
761 }
762 else /* WM_MOUSEMOVE */
763 {
764 UINT32 pos;
765
766 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
767 else
768 {
769 pt = SCROLL_ClipPos( &rect, pt );
770 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
771 }
772 if (pos != lastMousePos)
773 {
774 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
775 arrowSize, thumbSize );
776 lastMousePos = pos;
777 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
778 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
779 vertical,
780 SCROLL_TrackingPos );
781 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
782 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
783 hwndCtl );
784 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
785 arrowSize, thumbSize );
786 }
787 }
788 break;
789
790 case SCROLL_BOTTOM_RECT:
791 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
792 thumbPos, infoPtr->flags, vertical,
793 FALSE, (hittest == SCROLL_trackHitTest) );
794 if (hittest == SCROLL_trackHitTest)
795 {
796 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
797 {
798 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
799 SB_PAGEDOWN, hwndCtl );
800 SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
801 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
802 (TIMERPROC32)0 );
803 }
804 }
805 else KillSystemTimer32( hwnd, SCROLL_TIMER );
806 break;
807
808 case SCROLL_BOTTOM_ARROW:
809 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
810 FALSE, (hittest == SCROLL_trackHitTest) );
811 if (hittest == SCROLL_trackHitTest)
812 {
813 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
814 {
815 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
816 SB_LINEDOWN, hwndCtl );
817 SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
818 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
819 (TIMERPROC32)0 );
820 }
821 }
822 else KillSystemTimer32( hwnd, SCROLL_TIMER );
823 break;
824 }
825
826 if (msg == WM_LBUTTONUP)
827 {
828 hittest = SCROLL_trackHitTest;
829 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
830
831 if (hittest == SCROLL_THUMB)
832 {
833 UINT32 val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
834 trackThumbPos + lastMousePos - lastClickPos );
835 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
836 MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl );
837 }
838 else
839 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
840 SB_ENDSCROLL, hwndCtl );
841 }
842
843 ReleaseDC32( hwnd, hdc );
844 }
845
846
847 /***********************************************************************
848 * ScrollBarWndProc
849 */
850 LRESULT WINAPI ScrollBarWndProc( HWND32 hwnd, UINT32 message, WPARAM32 wParam,
851 LPARAM lParam )
852 {
853 switch(message)
854 {
855 case WM_CREATE:
856 {
857 CREATESTRUCT32A *lpCreat = (CREATESTRUCT32A *)lParam;
858 if (lpCreat->style & SBS_SIZEBOX)
859 {
860 FIXME(scroll, "Unimplemented style SBS_SIZEBOX.\n" );
861 return 0;
862 }
863
864 if (lpCreat->style & SBS_VERT)
865 {
866 if (lpCreat->style & SBS_LEFTALIGN)
867 MoveWindow32( hwnd, lpCreat->x, lpCreat->y,
868 SYSMETRICS_CXVSCROLL+1, lpCreat->cy, FALSE );
869 else if (lpCreat->style & SBS_RIGHTALIGN)
870 MoveWindow32( hwnd,
871 lpCreat->x+lpCreat->cx-SYSMETRICS_CXVSCROLL-1,
872 lpCreat->y,
873 SYSMETRICS_CXVSCROLL+1, lpCreat->cy, FALSE );
874 }
875 else /* SBS_HORZ */
876 {
877 if (lpCreat->style & SBS_TOPALIGN)
878 MoveWindow32( hwnd, lpCreat->x, lpCreat->y,
879 lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE );
880 else if (lpCreat->style & SBS_BOTTOMALIGN)
881 MoveWindow32( hwnd,
882 lpCreat->x,
883 lpCreat->y+lpCreat->cy-SYSMETRICS_CYHSCROLL-1,
884 lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE );
885 }
886 }
887 if (!hUpArrow) SCROLL_LoadBitmaps();
888 TRACE(scroll, "ScrollBar creation, hwnd=%04x\n", hwnd );
889 return 0;
890
891 case WM_LBUTTONDOWN:
892 case WM_LBUTTONUP:
893 case WM_MOUSEMOVE:
894 case WM_SYSTIMER:
895 {
896 POINT32 pt;
897 CONV_POINT16TO32( (POINT16 *)&lParam, &pt );
898 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
899 }
900 break;
901
902 case WM_KEYDOWN:
903 SCROLL_HandleKbdEvent( hwnd, wParam );
904 break;
905
906 case WM_ERASEBKGND:
907 return 1;
908
909 case WM_GETDLGCODE:
910 return DLGC_WANTARROWS; /* Windows returns this value */
911
912 case WM_PAINT:
913 {
914 PAINTSTRUCT32 ps;
915 HDC32 hdc = BeginPaint32( hwnd, &ps );
916 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
917 EndPaint32( hwnd, &ps );
918 }
919 break;
920
921 case SBM_SETPOS16:
922 case SBM_SETPOS32:
923 return SetScrollPos32( hwnd, SB_CTL, wParam, (BOOL32)lParam );
924
925 case SBM_GETPOS16:
926 case SBM_GETPOS32:
927 return GetScrollPos32( hwnd, SB_CTL );
928
929 case SBM_SETRANGE16:
930 SetScrollRange32( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
931 wParam /* FIXME: Is this correct? */ );
932 return 0;
933
934 case SBM_SETRANGE32:
935 SetScrollRange32( hwnd, SB_CTL, wParam, lParam, FALSE );
936 return 0; /* FIXME: return previous position */
937
938 case SBM_GETRANGE16:
939 FIXME(scroll, "don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
940 return 0;
941
942 case SBM_GETRANGE32:
943 GetScrollRange32( hwnd, SB_CTL, (LPINT32)wParam, (LPINT32)lParam );
944 return 0;
945
946 case SBM_ENABLE_ARROWS16:
947 case SBM_ENABLE_ARROWS32:
948 return EnableScrollBar32( hwnd, SB_CTL, wParam );
949
950 case SBM_SETRANGEREDRAW32:
951 SetScrollRange32( hwnd, SB_CTL, wParam, lParam, TRUE );
952 return 0; /* FIXME: return previous position */
953
954 case SBM_SETSCROLLINFO32:
955 return SetScrollInfo32( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
956
957 case SBM_GETSCROLLINFO32:
958 return GetScrollInfo32( hwnd, SB_CTL, (SCROLLINFO *)lParam );
959
960 case 0x00e5:
961 case 0x00e7:
962 case 0x00e8:
963 case 0x00eb:
964 case 0x00ec:
965 case 0x00ed:
966 case 0x00ee:
967 case 0x00ef:
968 ERR(scroll, "unknown Win32 msg %04x wp=%08x lp=%08lx\n",
969 message, wParam, lParam );
970 break;
971
972 default:
973 if (message >= WM_USER)
974 WARN(scroll, "unknown msg %04x wp=%04x lp=%08lx\n",
975 message, wParam, lParam );
976 return DefWindowProc32A( hwnd, message, wParam, lParam );
977 }
978 return 0;
979 }
980
981
982 /*************************************************************************
983 * SetScrollInfo16 (USER.475)
984 */
985 INT16 WINAPI SetScrollInfo16( HWND16 hwnd, INT16 nBar, const SCROLLINFO *info,
986 BOOL16 bRedraw )
987 {
988 return (INT16)SetScrollInfo32( hwnd, nBar, info, bRedraw );
989 }
990
991
992 /*************************************************************************
993 * SetScrollInfo32 (USER32.501)
994 * SetScrollInfo32 can be used to set the position, upper bound,
995 * lower bound, and page size of a scrollbar control.
996 *
997 * RETURNS
998 * Scrollbar position
999 *
1000 * NOTE
1001 * For 100 lines of text to be displayed in a window of 25 lines,
1002 * one would for instance use info->nMin=0, info->nMax=75
1003 * (corresponding to the 76 different positions of the window on
1004 * the text), and info->nPage=25.
1005 */
1006 INT32 WINAPI SetScrollInfo32(
1007 HWND32 hwnd /* [I] Handle of window whose scrollbar will be affected */,
1008 INT32 nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1009 const SCROLLINFO *info /* [I] Specifies what to change and new values */,
1010 BOOL32 bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
1011 {
1012 INT32 action;
1013 INT32 retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1014
1015 if( action & SA_SSI_HIDE )
1016 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1017 else
1018 {
1019 if( action & SA_SSI_SHOW )
1020 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1021 return retVal; /* SetWindowPos() already did the painting */
1022
1023 if( bRedraw && (action & SA_SSI_REFRESH))
1024 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1025 else if( action & SA_SSI_REPAINT_ARROWS )
1026 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1027 }
1028 return retVal;
1029 }
1030
1031 INT32 SCROLL_SetScrollInfo( HWND32 hwnd, INT32 nBar,
1032 const SCROLLINFO *info, INT32 *action )
1033 {
1034 /* Update the scrollbar state and set action flags according to
1035 * what has to be done graphics wise. */
1036
1037 SCROLLBAR_INFO *infoPtr;
1038 UINT32 new_flags;
1039
1040 dbg_decl_str(scroll, 256);
1041
1042 *action = 0;
1043
1044 if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
1045 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1046 if ((info->cbSize != sizeof(*info)) &&
1047 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1048
1049 /* Set the page size */
1050
1051 if (info->fMask & SIF_PAGE)
1052 {
1053 dsprintf(scroll, " page=%d", info->nPage );
1054 if( infoPtr->Page != info->nPage )
1055 {
1056 infoPtr->Page = info->nPage;
1057 *action |= SA_SSI_REFRESH;
1058 }
1059 }
1060
1061 /* Set the scroll pos */
1062
1063 if (info->fMask & SIF_POS)
1064 {
1065 dsprintf(scroll, " pos=%d", info->nPos );
1066 if( infoPtr->CurVal != info->nPos )
1067 {
1068 infoPtr->CurVal = info->nPos;
1069 *action |= SA_SSI_REFRESH;
1070 }
1071 }
1072
1073 /* Set the scroll range */
1074
1075 if (info->fMask & SIF_RANGE)
1076 {
1077 dsprintf(scroll, " min=%d max=%d", info->nMin, info->nMax );
1078
1079 /* Invalid range -> range is set to (0,0) */
1080 if ((info->nMin > info->nMax) ||
1081 ((UINT32)(info->nMax - info->nMin) >= 0x80000000))
1082 {
1083 infoPtr->MinVal = 0;
1084 infoPtr->MaxVal = 0;
1085 }
1086 else
1087 {
1088 if( infoPtr->MinVal != info->nMin ||
1089 infoPtr->MaxVal != info->nMax )
1090 {
1091 *action |= SA_SSI_REFRESH;
1092 infoPtr->MinVal = info->nMin;
1093 infoPtr->MaxVal = info->nMax;
1094 }
1095 }
1096 }
1097
1098 TRACE(scroll, "hwnd=%04x bar=%d %s\n",
1099 hwnd, nBar, dbg_str(scroll));
1100
1101 /* Make sure the page size is valid */
1102
1103 if (infoPtr->Page < 0) infoPtr->Page = 0;
1104 else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 )
1105 infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1;
1106
1107 /* Make sure the pos is inside the range */
1108
1109 if (infoPtr->CurVal < infoPtr->MinVal)
1110 infoPtr->CurVal = infoPtr->MinVal;
1111 else if (infoPtr->CurVal > infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1112 infoPtr->CurVal = infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 );
1113
1114 TRACE(scroll, " new values: page=%d pos=%d min=%d max=%d\n",
1115 infoPtr->Page, infoPtr->CurVal,
1116 infoPtr->MinVal, infoPtr->MaxVal );
1117
1118 /* Check if the scrollbar should be hidden or disabled */
1119
1120 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1121 {
1122 new_flags = infoPtr->flags;
1123 if (infoPtr->MinVal >= infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1124 {
1125 /* Hide or disable scroll-bar */
1126 if (info->fMask & SIF_DISABLENOSCROLL)
1127 {
1128 new_flags = ESB_DISABLE_BOTH;
1129 *action |= SA_SSI_REFRESH;
1130 }
1131 else if (nBar != SB_CTL)
1132 {
1133 *action = SA_SSI_HIDE;
1134 goto done;
1135 }
1136 }
1137 else /* Show and enable scroll-bar */
1138 {
1139 new_flags = 0;
1140 if (nBar != SB_CTL)
1141 *action |= SA_SSI_SHOW;
1142 }
1143
1144 if (infoPtr->flags != new_flags) /* check arrow flags */
1145 {
1146 infoPtr->flags = new_flags;
1147 *action |= SA_SSI_REPAINT_ARROWS;
1148 }
1149 }
1150
1151 done:
1152 /* Return current position */
1153
1154 return infoPtr->CurVal;
1155 }
1156
1157
1158 /*************************************************************************
1159 * GetScrollInfo16 (USER.476)
1160 */
1161 BOOL16 WINAPI GetScrollInfo16( HWND16 hwnd, INT16 nBar, LPSCROLLINFO info )
1162 {
1163 return GetScrollInfo32( hwnd, nBar, info );
1164 }
1165
1166
1167 /*************************************************************************
1168 * GetScrollInfo32 (USER32.284)
1169 * GetScrollInfo32 can be used to retrieve the position, upper bound,
1170 * lower bound, and page size of a scrollbar control.
1171 *
1172 * RETURNS STD
1173 */
1174 BOOL32 WINAPI GetScrollInfo32(
1175 HWND32 hwnd /* [I] Handle of window */ ,
1176 INT32 nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1177 LPSCROLLINFO info /* [IO] (info.fMask [I] specifies which values are to retrieve) */)
1178 {
1179 SCROLLBAR_INFO *infoPtr;
1180
1181 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1182 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1183 if ((info->cbSize != sizeof(*info)) &&
1184 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1185
1186 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page;
1187 if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal;
1188 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1189 info->nTrackPos = (SCROLL_TrackingWin==hwnd) ? SCROLL_TrackingVal : 0;
1190 if (info->fMask & SIF_RANGE)
1191 {
1192 info->nMin = infoPtr->MinVal;
1193 info->nMax = infoPtr->MaxVal;
1194 }
1195 return (info->fMask & SIF_ALL) != 0;
1196 }
1197
1198
1199 /*************************************************************************
1200 * SetScrollPos16 (USER.62)
1201 */
1202 INT16 WINAPI SetScrollPos16( HWND16 hwnd, INT16 nBar, INT16 nPos,
1203 BOOL16 bRedraw )
1204 {
1205 return (INT16)SetScrollPos32( hwnd, nBar, nPos, bRedraw );
1206 }
1207
1208
1209 /*************************************************************************
1210 * SetScrollPos32 (USER32.502)
1211 *
1212 * RETURNS
1213 * Success: Scrollbar position
1214 * Failure: 0
1215 *
1216 * REMARKS
1217 * Note the ambiguity when 0 is returned. Use GetLastError
1218 * to make sure there was an error (and to know which one).
1219 */
1220 INT32 WINAPI SetScrollPos32(
1221 HWND32 hwnd /* [I] Handle of window whose scrollbar will be affected */,
1222 INT32 nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1223 INT32 nPos /* [I] New value */,
1224 BOOL32 bRedraw /* [I] Should scrollbar be redrawn afterwards ? */ )
1225 {
1226 SCROLLINFO info;
1227 SCROLLBAR_INFO *infoPtr;
1228 INT32 oldPos;
1229
1230 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1231 oldPos = infoPtr->CurVal;
1232 info.cbSize = sizeof(info);
1233 info.nPos = nPos;
1234 info.fMask = SIF_POS;
1235 SetScrollInfo32( hwnd, nBar, &info, bRedraw );
1236 return oldPos;
1237 }
1238
1239
1240 /*************************************************************************
1241 * GetScrollPos16 (USER.63)
1242 */
1243 INT16 WINAPI GetScrollPos16( HWND16 hwnd, INT16 nBar )
1244 {
1245 return (INT16)GetScrollPos32( hwnd, nBar );
1246 }
1247
1248
1249 /*************************************************************************
1250 * GetScrollPos32 (USER32.285)
1251 *
1252 * RETURNS
1253 * Success: Current position
1254 * Failure: 0
1255 *
1256 * REMARKS
1257 * Note the ambiguity when 0 is returned. Use GetLastError
1258 * to make sure there was an error (and to know which one).
1259 */
1260 INT32 WINAPI GetScrollPos32(
1261 HWND32 hwnd, /* [I] Handle of window */
1262 INT32 nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */)
1263 {
1264 SCROLLBAR_INFO *infoPtr;
1265
1266 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1267 return infoPtr->CurVal;
1268 }
1269
1270
1271 /*************************************************************************
1272 * SetScrollRange16 (USER.64)
1273 */
1274 void WINAPI SetScrollRange16( HWND16 hwnd, INT16 nBar,
1275 INT16 MinVal, INT16 MaxVal, BOOL16 bRedraw )
1276 {
1277 /* Invalid range -> range is set to (0,0) */
1278 if ((INT32)MaxVal - (INT32)MinVal > 0x7fff) MinVal = MaxVal = 0;
1279 SetScrollRange32( hwnd, nBar, MinVal, MaxVal, bRedraw );
1280 }
1281
1282
1283 /*************************************************************************
1284 * SetScrollRange32 (USER32.503)
1285 *
1286 * RETURNS STD
1287 */
1288 BOOL32 WINAPI SetScrollRange32(
1289 HWND32 hwnd, /* [I] Handle of window whose scrollbar will be affected */
1290 INT32 nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
1291 INT32 MinVal, /* [I] New minimum value */
1292 INT32 MaxVal, /* [I] New maximum value */
1293 BOOL32 bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
1294 {
1295 SCROLLINFO info;
1296
1297 info.cbSize = sizeof(info);
1298 info.nMin = MinVal;
1299 info.nMax = MaxVal;
1300 info.fMask = SIF_RANGE;
1301 SetScrollInfo32( hwnd, nBar, &info, bRedraw );
1302 return TRUE;
1303 }
1304
1305
1306 /*************************************************************************
1307 * SCROLL_SetNCSbState
1308 *
1309 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1310 */
1311 INT32 SCROLL_SetNCSbState(WND* wndPtr, int vMin, int vMax, int vPos,
1312 int hMin, int hMax, int hPos)
1313 {
1314 INT32 vA, hA;
1315 SCROLLINFO vInfo, hInfo;
1316
1317 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1318 vInfo.nMin = vMin; hInfo.nMin = hMin;
1319 vInfo.nMax = vMax; hInfo.nMax = hMax;
1320 vInfo.nPos = vPos; hInfo.nPos = hPos;
1321 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1322
1323 SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_VERT, &vInfo, &vA );
1324 SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_HORZ, &hInfo, &hA );
1325
1326 if( !SCROLL_ShowScrollBar( wndPtr->hwndSelf, SB_BOTH,
1327 (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1328 {
1329 /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1330 if( vA & SA_SSI_REFRESH )
1331 SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_VERT, FALSE, TRUE );
1332
1333 if( hA & SA_SSI_REFRESH )
1334 SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_HORZ, FALSE, TRUE );
1335 }
1336 return 0;
1337 }
1338
1339
1340 /*************************************************************************
1341 * GetScrollRange16 (USER.65)
1342 */
1343 BOOL16 WINAPI GetScrollRange16( HWND16 hwnd, INT16 nBar,
1344 LPINT16 lpMin, LPINT16 lpMax)
1345 {
1346 INT32 min, max;
1347 BOOL16 ret = GetScrollRange32( hwnd, nBar, &min, &max );
1348 if (lpMin) *lpMin = min;
1349 if (lpMax) *lpMax = max;
1350 return ret;
1351 }
1352
1353
1354 /*************************************************************************
1355 * GetScrollRange32 (USER32.286)
1356 *
1357 * RETURNS STD
1358 */
1359 BOOL32 WINAPI GetScrollRange32(
1360 HWND32 hwnd, /* [I] Handle of window */
1361 INT32 nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
1362 LPINT32 lpMin, /* [O] Where to store minimum value */
1363 LPINT32 lpMax /* [O] Where to store maximum value */)
1364 {
1365 SCROLLBAR_INFO *infoPtr;
1366
1367 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1368 {
1369 if (lpMin) lpMin = 0;
1370 if (lpMax) lpMax = 0;
1371 return FALSE;
1372 }
1373 if (lpMin) *lpMin = infoPtr->MinVal;
1374 if (lpMax) *lpMax = infoPtr->MaxVal;
1375 return TRUE;
1376 }
1377
1378
1379 /*************************************************************************
1380 * SCROLL_ShowScrollBar()
1381 *
1382 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1383 * NOTE: fShowV/fShowH must be zero when nBar is SB_HORZ/SB_VERT.
1384 */
1385 BOOL32 SCROLL_ShowScrollBar( HWND32 hwnd, INT32 nBar,
1386 BOOL32 fShowH, BOOL32 fShowV )
1387 {
1388 WND *wndPtr = WIN_FindWndPtr( hwnd );
1389
1390 if (!wndPtr) return FALSE;
1391 TRACE(scroll, "hwnd=%04x bar=%d horz=%d, vert=%d\n",
1392 hwnd, nBar, fShowH, fShowV );
1393
1394 switch(nBar)
1395 {
1396 case SB_CTL:
1397 ShowWindow32( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1398 return TRUE;
1399
1400 case SB_BOTH:
1401 case SB_HORZ:
1402 if (fShowH)
1403 {
1404 fShowH = !(wndPtr->dwStyle & WS_HSCROLL);
1405 wndPtr->dwStyle |= WS_HSCROLL;
1406 }
1407 else /* hide it */
1408 {
1409 fShowH = (wndPtr->dwStyle & WS_HSCROLL);
1410 wndPtr->dwStyle &= ~WS_HSCROLL;
1411 }
1412 if( nBar == SB_HORZ ) break;
1413 /* fall through */
1414
1415 case SB_VERT:
1416 if (fShowV)
1417 {
1418 fShowV = !(wndPtr->dwStyle & WS_VSCROLL);
1419 wndPtr->dwStyle |= WS_VSCROLL;
1420 }
1421 else /* hide it */
1422 {
1423 fShowV = (wndPtr->dwStyle & WS_VSCROLL);
1424 wndPtr->dwStyle &= ~WS_VSCROLL;
1425 }
1426 break;
1427
1428 default:
1429 return FALSE; /* Nothing to do! */
1430 }
1431
1432 if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1433 {
1434 SetWindowPos32( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1435 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1436 return TRUE;
1437 }
1438
1439 return FALSE; /* no frame changes */
1440 }
1441
1442
1443 /*************************************************************************
1444 * ShowScrollBar16 (USER.267)
1445 */
1446 void WINAPI ShowScrollBar16( HWND16 hwnd, INT16 nBar, BOOL16 fShow )
1447 {
1448 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1449 (nBar == SB_HORZ) ? 0 : fShow );
1450 }
1451
1452
1453 /*************************************************************************
1454 * ShowScrollBar32 (USER32.532)
1455 *
1456 * RETURNS STD
1457 */
1458 BOOL32 WINAPI ShowScrollBar32(
1459 HWND32 hwnd, /* [I] Handle of window whose scrollbar(s) will be affected */
1460 INT32 nBar, /* [I] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1461 BOOL32 fShow /* [I] TRUE = show, FALSE = hide */)
1462 {
1463 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1464 (nBar == SB_HORZ) ? 0 : fShow );
1465 return TRUE;
1466 }
1467
1468
1469 /*************************************************************************
1470 * EnableScrollBar16 (USER.482)
1471 */
1472 BOOL16 WINAPI EnableScrollBar16( HWND16 hwnd, INT16 nBar, UINT16 flags )
1473 {
1474 return EnableScrollBar32( hwnd, nBar, flags );
1475 }
1476
1477
1478 /*************************************************************************
1479 * EnableScrollBar32 (USER32.171)
1480 */
1481 BOOL32 WINAPI EnableScrollBar32( HWND32 hwnd, INT32 nBar, UINT32 flags )
1482 {
1483 BOOL32 bFineWithMe;
1484 SCROLLBAR_INFO *infoPtr;
1485
1486 TRACE(scroll, "%04x %d %d\n", hwnd, nBar, flags );
1487
1488 flags &= ESB_DISABLE_BOTH;
1489
1490 if (nBar == SB_BOTH)
1491 {
1492 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE;
1493 if (!(bFineWithMe = (infoPtr->flags == flags)) )
1494 {
1495 infoPtr->flags = flags;
1496 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1497 }
1498 nBar = SB_HORZ;
1499 }
1500 else
1501 bFineWithMe = TRUE;
1502
1503 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1504 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1505 infoPtr->flags = flags;
1506
1507 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1508 return TRUE;
1509 }
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