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Release 990226.
[wine/gsoc-2012-control.git] / controls / scroll.c
blobb157d621b51f4324f20132f826ed3200442d8de6
1 /*
2 * Scrollbar control
3 *
4 * Copyright 1993 Martin Ayotte
5 * Copyright 1994, 1996 Alexandre Julliard
6 */
7
8 #include "wine/winuser16.h"
9 #include "sysmetrics.h"
10 #include "scroll.h"
11 #include "heap.h"
12 #include "win.h"
13 #include "debug.h"
14
15
16 static HBITMAP hUpArrow = 0;
17 static HBITMAP hDnArrow = 0;
18 static HBITMAP hLfArrow = 0;
19 static HBITMAP hRgArrow = 0;
20 static HBITMAP hUpArrowD = 0;
21 static HBITMAP hDnArrowD = 0;
22 static HBITMAP hLfArrowD = 0;
23 static HBITMAP hRgArrowD = 0;
24 static HBITMAP hUpArrowI = 0;
25 static HBITMAP hDnArrowI = 0;
26 static HBITMAP hLfArrowI = 0;
27 static HBITMAP hRgArrowI = 0;
28
29 #define TOP_ARROW(flags,pressed) \
30 (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
31 #define BOTTOM_ARROW(flags,pressed) \
32 (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
33 #define LEFT_ARROW(flags,pressed) \
34 (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
35 #define RIGHT_ARROW(flags,pressed) \
36 (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
37
38
39 /* Minimum size of the rectangle between the arrows */
40 #define SCROLL_MIN_RECT 4
41
42 /* Minimum size of the thumb in pixels */
43 #define SCROLL_MIN_THUMB 6
44
45 /* Overlap between arrows and thumb */
46 #define SCROLL_ARROW_THUMB_OVERLAP 1
47
48 /* Delay (in ms) before first repetition when holding the button down */
49 #define SCROLL_FIRST_DELAY 200
50
51 /* Delay (in ms) between scroll repetitions */
52 #define SCROLL_REPEAT_DELAY 50
53
54 /* Scroll timer id */
55 #define SCROLL_TIMER 0
56
57 /* Scroll-bar hit testing */
58 enum SCROLL_HITTEST
59 {
60 SCROLL_NOWHERE, /* Outside the scroll bar */
61 SCROLL_TOP_ARROW, /* Top or left arrow */
62 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
63 SCROLL_THUMB, /* Thumb rectangle */
64 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
65 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
66 };
67
68 /* What to do after SCROLL_SetScrollInfo() */
69 #define SA_SSI_HIDE 0x0001
70 #define SA_SSI_SHOW 0x0002
71 #define SA_SSI_REFRESH 0x0004
72 #define SA_SSI_REPAINT_ARROWS 0x0008
73
74 /* Thumb-tracking info */
75 static HWND SCROLL_TrackingWin = 0;
76 static INT SCROLL_TrackingBar = 0;
77 static INT SCROLL_TrackingPos = 0;
78 static INT SCROLL_TrackingVal = 0;
79 /* Hit test code of the last button-down event */
80 static enum SCROLL_HITTEST SCROLL_trackHitTest;
81 static BOOL SCROLL_trackVertical;
82
83 /* Is the moving thumb being displayed? */
84 static BOOL SCROLL_MovingThumb = FALSE;
85
86 /* Local functions */
87 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
88 BOOL fShowH, BOOL fShowV );
89 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
90 const SCROLLINFO *info, INT *action );
91
92 /***********************************************************************
93 * SCROLL_LoadBitmaps
94 */
95 static void SCROLL_LoadBitmaps(void)
96 {
97 hUpArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
98 hDnArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
99 hLfArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
100 hRgArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
101 hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
102 hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
103 hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
104 hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
105 hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
106 hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
107 hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
108 hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
109 }
110
111
112 /***********************************************************************
113 * SCROLL_GetPtrScrollInfo
114 */
115 static SCROLLBAR_INFO *SCROLL_GetPtrScrollInfo( WND* wndPtr, INT nBar )
116 {
117 SCROLLBAR_INFO *infoPtr;
118
119 if (!wndPtr) return NULL;
120 switch(nBar)
121 {
122 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
123 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
124 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
125 default: return NULL;
126 }
127
128 if (!infoPtr) /* Create the info structure if needed */
129 {
130 if ((infoPtr = HeapAlloc( SystemHeap, 0, sizeof(SCROLLBAR_INFO) )))
131 {
132 infoPtr->MinVal = infoPtr->CurVal = infoPtr->Page = 0;
133 infoPtr->MaxVal = 100;
134 infoPtr->flags = ESB_ENABLE_BOTH;
135 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
136 else wndPtr->pVScroll = infoPtr;
137 }
138 if (!hUpArrow) SCROLL_LoadBitmaps();
139 }
140 return infoPtr;
141 }
142
143
144 /***********************************************************************
145 * SCROLL_GetScrollInfo
146 */
147 static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND hwnd, INT nBar )
148 {
149 WND *wndPtr = WIN_FindWndPtr( hwnd );
150 return SCROLL_GetPtrScrollInfo( wndPtr, nBar );
151 }
152
153
154 /***********************************************************************
155 * SCROLL_GetScrollBarRect
156 *
157 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
158 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
159 * 'arrowSize' returns the width or height of an arrow (depending on
160 * the orientation of the scrollbar), 'thumbSize' returns the size of
161 * the thumb, and 'thumbPos' returns the position of the thumb
162 * relative to the left or to the top.
163 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
164 */
165 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
166 INT *arrowSize, INT *thumbSize,
167 INT *thumbPos )
168 {
169 INT pixels;
170 BOOL vertical;
171 WND *wndPtr = WIN_FindWndPtr( hwnd );
172
173 switch(nBar)
174 {
175 case SB_HORZ:
176 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
177 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
178 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
179 lprect->bottom = lprect->top + SYSMETRICS_CYHSCROLL;
180 if(wndPtr->dwStyle & WS_BORDER) {
181 lprect->left--;
182 lprect->right++;
183 } else if(wndPtr->dwStyle & WS_VSCROLL)
184 lprect->right++;
185 vertical = FALSE;
186 break;
187
188 case SB_VERT:
189 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
190 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
191 lprect->right = lprect->left + SYSMETRICS_CXVSCROLL;
192 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
193 if(wndPtr->dwStyle & WS_BORDER) {
194 lprect->top--;
195 lprect->bottom++;
196 } else if(wndPtr->dwStyle & WS_HSCROLL)
197 lprect->bottom++;
198 vertical = TRUE;
199 break;
200
201 case SB_CTL:
202 GetClientRect( hwnd, lprect );
203 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
204 break;
205
206 default:
207 return FALSE;
208 }
209
210 if (vertical) pixels = lprect->bottom - lprect->top;
211 else pixels = lprect->right - lprect->left;
212
213 if (pixels <= 2*SYSMETRICS_CXVSCROLL + SCROLL_MIN_RECT)
214 {
215 if (pixels > SCROLL_MIN_RECT)
216 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
217 else
218 *arrowSize = 0;
219 *thumbPos = *thumbSize = 0;
220 }
221 else
222 {
223 SCROLLBAR_INFO *info = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
224
225 *arrowSize = SYSMETRICS_CXVSCROLL;
226 pixels -= (2 * (SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP));
227
228 if (info->Page)
229 {
230 *thumbSize = pixels * info->Page / (info->MaxVal-info->MinVal+1);
231 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
232 }
233 else *thumbSize = SYSMETRICS_CXVSCROLL;
234
235 if (((pixels -= *thumbSize ) < 0) ||
236 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
237 {
238 /* Rectangle too small or scrollbar disabled -> no thumb */
239 *thumbPos = *thumbSize = 0;
240 }
241 else
242 {
243 INT max = info->MaxVal - MAX( info->Page-1, 0 );
244 if (info->MinVal >= max)
245 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
246 else
247 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
248 + pixels * (info->CurVal-info->MinVal) / (max - info->MinVal);
249 }
250 }
251 return vertical;
252 }
253
254
255 /***********************************************************************
256 * SCROLL_GetThumbVal
257 *
258 * Compute the current scroll position based on the thumb position in pixels
259 * from the top of the scroll-bar.
260 */
261 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
262 BOOL vertical, INT pos )
263 {
264 INT thumbSize;
265 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
266
267 if ((pixels -= 2*(SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
268 return infoPtr->MinVal;
269
270 if (infoPtr->Page)
271 {
272 thumbSize = pixels * infoPtr->Page/(infoPtr->MaxVal-infoPtr->MinVal+1);
273 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
274 }
275 else thumbSize = SYSMETRICS_CXVSCROLL;
276
277 if ((pixels -= thumbSize) <= 0) return infoPtr->MinVal;
278
279 pos = MAX( 0, pos - (SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP) );
280 if (pos > pixels) pos = pixels;
281
282 if (!infoPtr->Page) pos *= infoPtr->MaxVal - infoPtr->MinVal;
283 else pos *= infoPtr->MaxVal - infoPtr->MinVal - infoPtr->Page + 1;
284 return infoPtr->MinVal + ((pos + pixels / 2) / pixels);
285 }
286
287 /***********************************************************************
288 * SCROLL_PtInRectEx
289 */
290 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
291 {
292 RECT rect = *lpRect;
293
294 if (vertical)
295 {
296 rect.left -= lpRect->right - lpRect->left;
297 rect.right += lpRect->right - lpRect->left;
298 }
299 else
300 {
301 rect.top -= lpRect->bottom - lpRect->top;
302 rect.bottom += lpRect->bottom - lpRect->top;
303 }
304 return PtInRect( &rect, pt );
305 }
306
307 /***********************************************************************
308 * SCROLL_ClipPos
309 */
310 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
311 {
312 if( pt.x < lpRect->left )
313 pt.x = lpRect->left;
314 else
315 if( pt.x > lpRect->right )
316 pt.x = lpRect->right;
317
318 if( pt.y < lpRect->top )
319 pt.y = lpRect->top;
320 else
321 if( pt.y > lpRect->bottom )
322 pt.y = lpRect->bottom;
323
324 return pt;
325 }
326
327
328 /***********************************************************************
329 * SCROLL_HitTest
330 *
331 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
332 */
333 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
334 POINT pt, BOOL bDragging )
335 {
336 INT arrowSize, thumbSize, thumbPos;
337 RECT rect;
338
339 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
340 &arrowSize, &thumbSize, &thumbPos );
341
342 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
343 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
344
345 if (vertical)
346 {
347 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
348 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
349 if (!thumbPos) return SCROLL_TOP_RECT;
350 pt.y -= rect.top;
351 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
352 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
353 }
354 else /* horizontal */
355 {
356 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
357 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
358 if (!thumbPos) return SCROLL_TOP_RECT;
359 pt.x -= rect.left;
360 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
361 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
362 }
363 return SCROLL_THUMB;
364 }
365
366
367 /***********************************************************************
368 * SCROLL_DrawArrows
369 *
370 * Draw the scroll bar arrows.
371 */
372 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
373 RECT *rect, INT arrowSize, BOOL vertical,
374 BOOL top_pressed, BOOL bottom_pressed )
375 {
376 HDC hdcMem = CreateCompatibleDC( hdc );
377 HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
378 TOP_ARROW(infoPtr->flags, top_pressed)
379 : LEFT_ARROW(infoPtr->flags, top_pressed));
380
381 SetStretchBltMode( hdc, STRETCH_DELETESCANS );
382 StretchBlt( hdc, rect->left, rect->top,
383 vertical ? rect->right-rect->left : arrowSize,
384 vertical ? arrowSize : rect->bottom-rect->top,
385 hdcMem, 0, 0,
386 SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL,
387 SRCCOPY );
388
389 SelectObject( hdcMem, vertical ?
390 BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
391 : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
392 if (vertical)
393 StretchBlt( hdc, rect->left, rect->bottom - arrowSize,
394 rect->right - rect->left, arrowSize,
395 hdcMem, 0, 0,
396 SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL,
397 SRCCOPY );
398 else
399 StretchBlt( hdc, rect->right - arrowSize, rect->top,
400 arrowSize, rect->bottom - rect->top,
401 hdcMem, 0, 0,
402 SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL,
403 SRCCOPY );
404 SelectObject( hdcMem, hbmpPrev );
405 DeleteDC( hdcMem );
406 }
407
408
409 /***********************************************************************
410 * SCROLL_DrawMovingThumb
411 *
412 * Draw the moving thumb rectangle.
413 */
414 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
415 INT arrowSize, INT thumbSize )
416 {
417 RECT r = *rect;
418 if (vertical)
419 {
420 r.top += SCROLL_TrackingPos;
421 if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
422 r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
423 if (r.top + thumbSize >
424 rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
425 r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
426 - thumbSize;
427 r.bottom = r.top + thumbSize;
428 }
429 else
430 {
431 r.left += SCROLL_TrackingPos;
432 if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
433 r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
434 if (r.left + thumbSize >
435 rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
436 r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
437 - thumbSize;
438 r.right = r.left + thumbSize;
439 }
440 DrawFocusRect( hdc, &r );
441 SCROLL_MovingThumb = !SCROLL_MovingThumb;
442 }
443
444
445 /***********************************************************************
446 * SCROLL_DrawInterior
447 *
448 * Draw the scroll bar interior (everything except the arrows).
449 */
450 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
451 RECT *rect, INT arrowSize,
452 INT thumbSize, INT thumbPos,
453 UINT flags, BOOL vertical,
454 BOOL top_selected, BOOL bottom_selected )
455 {
456 RECT r;
457
458 /* Select the correct brush and pen */
459
460 SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
461 if ((flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
462 {
463 /* This ought to be the color of the parent window */
464 SelectObject( hdc, GetSysColorBrush(COLOR_WINDOW) );
465 }
466 else
467 {
468 if (nBar == SB_CTL) /* Only scrollbar controls send WM_CTLCOLOR */
469 {
470 HBRUSH hbrush = SendMessageA(GetParent(hwnd),
471 WM_CTLCOLORSCROLLBAR, hdc, hwnd );
472 SelectObject( hdc, hbrush );
473 }
474 else SelectObject( hdc, GetSysColorBrush(COLOR_SCROLLBAR) );
475 }
476
477 /* Calculate the scroll rectangle */
478
479 r = *rect;
480 if (vertical)
481 {
482 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
483 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
484 }
485 else
486 {
487 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
488 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
489 }
490
491 /* Draw the scroll bar frame */
492
493 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
494
495 /* Draw the scroll rectangles and thumb */
496
497 if (!thumbPos) /* No thumb to draw */
498 {
499 PatBlt( hdc, r.left+1, r.top+1, r.right - r.left - 2,
500 r.bottom - r.top - 2, PATCOPY );
501 return;
502 }
503
504 if (vertical)
505 {
506 PatBlt( hdc, r.left + 1, r.top + 1,
507 r.right - r.left - 2,
508 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - 1,
509 top_selected ? 0x0f0000 : PATCOPY );
510 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
511 PatBlt( hdc, r.left + 1, r.top + thumbSize,
512 r.right - r.left - 2,
513 r.bottom - r.top - thumbSize - 1,
514 bottom_selected ? 0x0f0000 : PATCOPY );
515 r.bottom = r.top + thumbSize;
516 }
517 else /* horizontal */
518 {
519 PatBlt( hdc, r.left + 1, r.top + 1,
520 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - 1,
521 r.bottom - r.top - 2,
522 top_selected ? 0x0f0000 : PATCOPY );
523 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
524 PatBlt( hdc, r.left + thumbSize, r.top + 1,
525 r.right - r.left - thumbSize - 1,
526 r.bottom - r.top - 2,
527 bottom_selected ? 0x0f0000 : PATCOPY );
528 r.right = r.left + thumbSize;
529 }
530
531 /* Draw the thumb */
532
533 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
534 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
535 r.top++, r.left++;
536 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
537 if (SCROLL_MovingThumb &&
538 (SCROLL_TrackingWin == hwnd) &&
539 (SCROLL_TrackingBar == nBar))
540 {
541 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
542 SCROLL_MovingThumb = TRUE;
543 }
544 }
545
546
547 /***********************************************************************
548 * SCROLL_DrawScrollBar
549 *
550 * Redraw the whole scrollbar.
551 */
552 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
553 BOOL arrows, BOOL interior )
554 {
555 INT arrowSize, thumbSize, thumbPos;
556 RECT rect;
557 BOOL vertical;
558 WND *wndPtr = WIN_FindWndPtr( hwnd );
559 SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
560
561 if (!wndPtr || !infoPtr ||
562 ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
563 ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) return;
564 if (!WIN_IsWindowDrawable( wndPtr, FALSE )) return;
565
566 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
567 &arrowSize, &thumbSize, &thumbPos );
568
569 /* Draw the arrows */
570
571 if (arrows && arrowSize)
572 {
573 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
574 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
575 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
576 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
577 else
578 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
579 FALSE, FALSE );
580 }
581 if( interior )
582 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
583 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
584 }
585
586
587 /***********************************************************************
588 * SCROLL_RefreshScrollBar
589 *
590 * Repaint the scroll bar interior after a SetScrollRange() or
591 * SetScrollPos() call.
592 */
593 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
594 BOOL arrows, BOOL interior )
595 {
596 HDC hdc = GetDCEx( hwnd, 0,
597 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
598 if (!hdc) return;
599
600 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
601 ReleaseDC( hwnd, hdc );
602 }
603
604
605 /***********************************************************************
606 * SCROLL_HandleKbdEvent
607 *
608 * Handle a keyboard event (only for SB_CTL scrollbars).
609 */
610 static void SCROLL_HandleKbdEvent( HWND hwnd, WPARAM wParam )
611 {
612 WND *wndPtr = WIN_FindWndPtr( hwnd );
613 WPARAM msg;
614
615 switch(wParam)
616 {
617 case VK_PRIOR: msg = SB_PAGEUP; break;
618 case VK_NEXT: msg = SB_PAGEDOWN; break;
619 case VK_HOME: msg = SB_TOP; break;
620 case VK_END: msg = SB_BOTTOM; break;
621 case VK_UP: msg = SB_LINEUP; break;
622 case VK_DOWN: msg = SB_LINEDOWN; break;
623 default:
624 return;
625 }
626 SendMessageA( GetParent(hwnd),
627 (wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
628 msg, hwnd );
629 }
630
631
632 /***********************************************************************
633 * SCROLL_HandleScrollEvent
634 *
635 * Handle a mouse or timer event for the scrollbar.
636 * 'pt' is the location of the mouse event in client (for SB_CTL) or
637 * windows coordinates.
638 */
639 void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
640 {
641 /* Previous mouse position for timer events */
642 static POINT prevPt;
643 /* Thumb position when tracking started. */
644 static UINT trackThumbPos;
645 /* Position in the scroll-bar of the last button-down event. */
646 static INT lastClickPos;
647 /* Position in the scroll-bar of the last mouse event. */
648 static INT lastMousePos;
649
650 enum SCROLL_HITTEST hittest;
651 HWND hwndOwner, hwndCtl;
652 BOOL vertical;
653 INT arrowSize, thumbSize, thumbPos;
654 RECT rect;
655 HDC hdc;
656
657 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
658 if (!infoPtr) return;
659 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
660 return;
661
662 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
663 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
664 &arrowSize, &thumbSize, &thumbPos );
665 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
666 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
667
668 switch(msg)
669 {
670 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
671 SCROLL_trackVertical = vertical;
672 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
673 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
674 lastMousePos = lastClickPos;
675 trackThumbPos = thumbPos;
676 prevPt = pt;
677 SetCapture( hwnd );
678 if (nBar == SB_CTL) SetFocus( hwnd );
679 break;
680
681 case WM_MOUSEMOVE:
682 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
683 prevPt = pt;
684 break;
685
686 case WM_LBUTTONUP:
687 hittest = SCROLL_NOWHERE;
688 ReleaseCapture();
689 break;
690
691 case WM_SYSTIMER:
692 pt = prevPt;
693 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
694 break;
695
696 default:
697 return; /* Should never happen */
698 }
699
700 TRACE(scroll, "Event: hwnd=%04x bar=%d msg=%x pt=%ld,%ld hit=%d\n",
701 hwnd, nBar, msg, pt.x, pt.y, hittest );
702
703 switch(SCROLL_trackHitTest)
704 {
705 case SCROLL_NOWHERE: /* No tracking in progress */
706 break;
707
708 case SCROLL_TOP_ARROW:
709 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
710 (hittest == SCROLL_trackHitTest), FALSE );
711 if (hittest == SCROLL_trackHitTest)
712 {
713 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
714 {
715 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
716 SB_LINEUP, hwndCtl );
717 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
718 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
719 (TIMERPROC)0 );
720 }
721 }
722 else KillSystemTimer( hwnd, SCROLL_TIMER );
723 break;
724
725 case SCROLL_TOP_RECT:
726 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
727 thumbPos, infoPtr->flags, vertical,
728 (hittest == SCROLL_trackHitTest), FALSE );
729 if (hittest == SCROLL_trackHitTest)
730 {
731 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
732 {
733 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
734 SB_PAGEUP, hwndCtl );
735 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
736 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
737 (TIMERPROC)0 );
738 }
739 }
740 else KillSystemTimer( hwnd, SCROLL_TIMER );
741 break;
742
743 case SCROLL_THUMB:
744 if (msg == WM_LBUTTONDOWN)
745 {
746 SCROLL_TrackingWin = hwnd;
747 SCROLL_TrackingBar = nBar;
748 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
749 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
750 }
751 else if (msg == WM_LBUTTONUP)
752 {
753 SCROLL_TrackingWin = 0;
754 SCROLL_MovingThumb = FALSE;
755 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
756 thumbPos, infoPtr->flags, vertical,
757 FALSE, FALSE );
758 }
759 else /* WM_MOUSEMOVE */
760 {
761 UINT pos;
762
763 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
764 else
765 {
766 pt = SCROLL_ClipPos( &rect, pt );
767 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
768 }
769 if (pos != lastMousePos)
770 {
771 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
772 arrowSize, thumbSize );
773 lastMousePos = pos;
774 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
775 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
776 vertical,
777 SCROLL_TrackingPos );
778 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
779 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
780 hwndCtl );
781 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
782 arrowSize, thumbSize );
783 }
784 }
785 break;
786
787 case SCROLL_BOTTOM_RECT:
788 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
789 thumbPos, infoPtr->flags, vertical,
790 FALSE, (hittest == SCROLL_trackHitTest) );
791 if (hittest == SCROLL_trackHitTest)
792 {
793 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
794 {
795 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
796 SB_PAGEDOWN, hwndCtl );
797 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
798 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
799 (TIMERPROC)0 );
800 }
801 }
802 else KillSystemTimer( hwnd, SCROLL_TIMER );
803 break;
804
805 case SCROLL_BOTTOM_ARROW:
806 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
807 FALSE, (hittest == SCROLL_trackHitTest) );
808 if (hittest == SCROLL_trackHitTest)
809 {
810 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
811 {
812 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
813 SB_LINEDOWN, hwndCtl );
814 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
815 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
816 (TIMERPROC)0 );
817 }
818 }
819 else KillSystemTimer( hwnd, SCROLL_TIMER );
820 break;
821 }
822
823 if (msg == WM_LBUTTONUP)
824 {
825 hittest = SCROLL_trackHitTest;
826 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
827
828 if (hittest == SCROLL_THUMB)
829 {
830 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
831 trackThumbPos + lastMousePos - lastClickPos );
832 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
833 MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl );
834 }
835 else
836 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
837 SB_ENDSCROLL, hwndCtl );
838 }
839
840 ReleaseDC( hwnd, hdc );
841 }
842
843
844 /***********************************************************************
845 * ScrollBarWndProc
846 */
847 LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam,
848 LPARAM lParam )
849 {
850 switch(message)
851 {
852 case WM_CREATE:
853 {
854 CREATESTRUCTA *lpCreat = (CREATESTRUCTA *)lParam;
855 if (lpCreat->style & SBS_SIZEBOX)
856 {
857 FIXME(scroll, "Unimplemented style SBS_SIZEBOX.\n" );
858 return 0;
859 }
860
861 if (lpCreat->style & SBS_VERT)
862 {
863 if (lpCreat->style & SBS_LEFTALIGN)
864 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
865 SYSMETRICS_CXVSCROLL+1, lpCreat->cy, FALSE );
866 else if (lpCreat->style & SBS_RIGHTALIGN)
867 MoveWindow( hwnd,
868 lpCreat->x+lpCreat->cx-SYSMETRICS_CXVSCROLL-1,
869 lpCreat->y,
870 SYSMETRICS_CXVSCROLL+1, lpCreat->cy, FALSE );
871 }
872 else /* SBS_HORZ */
873 {
874 if (lpCreat->style & SBS_TOPALIGN)
875 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
876 lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE );
877 else if (lpCreat->style & SBS_BOTTOMALIGN)
878 MoveWindow( hwnd,
879 lpCreat->x,
880 lpCreat->y+lpCreat->cy-SYSMETRICS_CYHSCROLL-1,
881 lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE );
882 }
883 }
884 if (!hUpArrow) SCROLL_LoadBitmaps();
885 TRACE(scroll, "ScrollBar creation, hwnd=%04x\n", hwnd );
886 return 0;
887
888 case WM_LBUTTONDOWN:
889 case WM_LBUTTONUP:
890 case WM_MOUSEMOVE:
891 case WM_SYSTIMER:
892 {
893 POINT pt;
894 CONV_POINT16TO32( (POINT16 *)&lParam, &pt );
895 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
896 }
897 break;
898
899 case WM_KEYDOWN:
900 SCROLL_HandleKbdEvent( hwnd, wParam );
901 break;
902
903 case WM_ERASEBKGND:
904 return 1;
905
906 case WM_GETDLGCODE:
907 return DLGC_WANTARROWS; /* Windows returns this value */
908
909 case WM_PAINT:
910 {
911 PAINTSTRUCT ps;
912 HDC hdc = BeginPaint( hwnd, &ps );
913 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
914 EndPaint( hwnd, &ps );
915 }
916 break;
917
918 case SBM_SETPOS16:
919 case SBM_SETPOS:
920 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
921
922 case SBM_GETPOS16:
923 case SBM_GETPOS:
924 return GetScrollPos( hwnd, SB_CTL );
925
926 case SBM_SETRANGE16:
927 SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
928 wParam /* FIXME: Is this correct? */ );
929 return 0;
930
931 case SBM_SETRANGE:
932 SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
933 return 0; /* FIXME: return previous position */
934
935 case SBM_GETRANGE16:
936 FIXME(scroll, "don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
937 return 0;
938
939 case SBM_GETRANGE:
940 GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
941 return 0;
942
943 case SBM_ENABLE_ARROWS16:
944 case SBM_ENABLE_ARROWS:
945 return EnableScrollBar( hwnd, SB_CTL, wParam );
946
947 case SBM_SETRANGEREDRAW:
948 SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
949 return 0; /* FIXME: return previous position */
950
951 case SBM_SETSCROLLINFO:
952 return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
953
954 case SBM_GETSCROLLINFO:
955 return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
956
957 case 0x00e5:
958 case 0x00e7:
959 case 0x00e8:
960 case 0x00eb:
961 case 0x00ec:
962 case 0x00ed:
963 case 0x00ee:
964 case 0x00ef:
965 ERR(scroll, "unknown Win32 msg %04x wp=%08x lp=%08lx\n",
966 message, wParam, lParam );
967 break;
968
969 default:
970 if (message >= WM_USER)
971 WARN(scroll, "unknown msg %04x wp=%04x lp=%08lx\n",
972 message, wParam, lParam );
973 return DefWindowProcA( hwnd, message, wParam, lParam );
974 }
975 return 0;
976 }
977
978
979 /*************************************************************************
980 * SetScrollInfo16 (USER.475)
981 */
982 INT16 WINAPI SetScrollInfo16( HWND16 hwnd, INT16 nBar, const SCROLLINFO *info,
983 BOOL16 bRedraw )
984 {
985 return (INT16)SetScrollInfo( hwnd, nBar, info, bRedraw );
986 }
987
988
989 /*************************************************************************
990 * SetScrollInfo32 (USER32.501)
991 * SetScrollInfo32 can be used to set the position, upper bound,
992 * lower bound, and page size of a scrollbar control.
993 *
994 * RETURNS
995 * Scrollbar position
996 *
997 * NOTE
998 * For 100 lines of text to be displayed in a window of 25 lines,
999 * one would for instance use info->nMin=0, info->nMax=75
1000 * (corresponding to the 76 different positions of the window on
1001 * the text), and info->nPage=25.
1002 */
1003 INT WINAPI SetScrollInfo(
1004 HWND hwnd /* [I] Handle of window whose scrollbar will be affected */,
1005 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1006 const SCROLLINFO *info /* [I] Specifies what to change and new values */,
1007 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
1008 {
1009 INT action;
1010 INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1011
1012 if( action & SA_SSI_HIDE )
1013 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1014 else
1015 {
1016 if( action & SA_SSI_SHOW )
1017 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1018 return retVal; /* SetWindowPos() already did the painting */
1019
1020 if( bRedraw && (action & SA_SSI_REFRESH))
1021 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1022 else if( action & SA_SSI_REPAINT_ARROWS )
1023 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1024 }
1025 return retVal;
1026 }
1027
1028 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1029 const SCROLLINFO *info, INT *action )
1030 {
1031 /* Update the scrollbar state and set action flags according to
1032 * what has to be done graphics wise. */
1033
1034 SCROLLBAR_INFO *infoPtr;
1035 UINT new_flags;
1036
1037 dbg_decl_str(scroll, 256);
1038
1039 *action = 0;
1040
1041 if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
1042 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1043 if ((info->cbSize != sizeof(*info)) &&
1044 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1045
1046 /* Set the page size */
1047
1048 if (info->fMask & SIF_PAGE)
1049 {
1050 dsprintf(scroll, " page=%d", info->nPage );
1051 if( infoPtr->Page != info->nPage )
1052 {
1053 infoPtr->Page = info->nPage;
1054 *action |= SA_SSI_REFRESH;
1055 }
1056 }
1057
1058 /* Set the scroll pos */
1059
1060 if (info->fMask & SIF_POS)
1061 {
1062 dsprintf(scroll, " pos=%d", info->nPos );
1063 if( infoPtr->CurVal != info->nPos )
1064 {
1065 infoPtr->CurVal = info->nPos;
1066 *action |= SA_SSI_REFRESH;
1067 }
1068 }
1069
1070 /* Set the scroll range */
1071
1072 if (info->fMask & SIF_RANGE)
1073 {
1074 dsprintf(scroll, " min=%d max=%d", info->nMin, info->nMax );
1075
1076 /* Invalid range -> range is set to (0,0) */
1077 if ((info->nMin > info->nMax) ||
1078 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1079 {
1080 infoPtr->MinVal = 0;
1081 infoPtr->MaxVal = 0;
1082 }
1083 else
1084 {
1085 if( infoPtr->MinVal != info->nMin ||
1086 infoPtr->MaxVal != info->nMax )
1087 {
1088 *action |= SA_SSI_REFRESH;
1089 infoPtr->MinVal = info->nMin;
1090 infoPtr->MaxVal = info->nMax;
1091 }
1092 }
1093 }
1094
1095 TRACE(scroll, "hwnd=%04x bar=%d %s\n",
1096 hwnd, nBar, dbg_str(scroll));
1097
1098 /* Make sure the page size is valid */
1099
1100 if (infoPtr->Page < 0) infoPtr->Page = 0;
1101 else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 )
1102 infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1;
1103
1104 /* Make sure the pos is inside the range */
1105
1106 if (infoPtr->CurVal < infoPtr->MinVal)
1107 infoPtr->CurVal = infoPtr->MinVal;
1108 else if (infoPtr->CurVal > infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1109 infoPtr->CurVal = infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 );
1110
1111 TRACE(scroll, " new values: page=%d pos=%d min=%d max=%d\n",
1112 infoPtr->Page, infoPtr->CurVal,
1113 infoPtr->MinVal, infoPtr->MaxVal );
1114
1115 /* Check if the scrollbar should be hidden or disabled */
1116
1117 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1118 {
1119 new_flags = infoPtr->flags;
1120 if (infoPtr->MinVal >= infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1121 {
1122 /* Hide or disable scroll-bar */
1123 if (info->fMask & SIF_DISABLENOSCROLL)
1124 {
1125 new_flags = ESB_DISABLE_BOTH;
1126 *action |= SA_SSI_REFRESH;
1127 }
1128 else if (nBar != SB_CTL)
1129 {
1130 *action = SA_SSI_HIDE;
1131 goto done;
1132 }
1133 }
1134 else /* Show and enable scroll-bar */
1135 {
1136 new_flags = 0;
1137 if (nBar != SB_CTL)
1138 *action |= SA_SSI_SHOW;
1139 }
1140
1141 if (infoPtr->flags != new_flags) /* check arrow flags */
1142 {
1143 infoPtr->flags = new_flags;
1144 *action |= SA_SSI_REPAINT_ARROWS;
1145 }
1146 }
1147
1148 done:
1149 /* Return current position */
1150
1151 return infoPtr->CurVal;
1152 }
1153
1154
1155 /*************************************************************************
1156 * GetScrollInfo16 (USER.476)
1157 */
1158 BOOL16 WINAPI GetScrollInfo16( HWND16 hwnd, INT16 nBar, LPSCROLLINFO info )
1159 {
1160 return GetScrollInfo( hwnd, nBar, info );
1161 }
1162
1163
1164 /*************************************************************************
1165 * GetScrollInfo32 (USER32.284)
1166 * GetScrollInfo32 can be used to retrieve the position, upper bound,
1167 * lower bound, and page size of a scrollbar control.
1168 *
1169 * RETURNS STD
1170 */
1171 BOOL WINAPI GetScrollInfo(
1172 HWND hwnd /* [I] Handle of window */ ,
1173 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1174 LPSCROLLINFO info /* [IO] (info.fMask [I] specifies which values are to retrieve) */)
1175 {
1176 SCROLLBAR_INFO *infoPtr;
1177
1178 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1179 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1180 if ((info->cbSize != sizeof(*info)) &&
1181 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1182
1183 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page;
1184 if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal;
1185 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1186 info->nTrackPos = (SCROLL_TrackingWin==hwnd) ? SCROLL_TrackingVal : 0;
1187 if (info->fMask & SIF_RANGE)
1188 {
1189 info->nMin = infoPtr->MinVal;
1190 info->nMax = infoPtr->MaxVal;
1191 }
1192 return (info->fMask & SIF_ALL) != 0;
1193 }
1194
1195
1196 /*************************************************************************
1197 * SetScrollPos16 (USER.62)
1198 */
1199 INT16 WINAPI SetScrollPos16( HWND16 hwnd, INT16 nBar, INT16 nPos,
1200 BOOL16 bRedraw )
1201 {
1202 return (INT16)SetScrollPos( hwnd, nBar, nPos, bRedraw );
1203 }
1204
1205
1206 /*************************************************************************
1207 * SetScrollPos32 (USER32.502)
1208 *
1209 * RETURNS
1210 * Success: Scrollbar position
1211 * Failure: 0
1212 *
1213 * REMARKS
1214 * Note the ambiguity when 0 is returned. Use GetLastError
1215 * to make sure there was an error (and to know which one).
1216 */
1217 INT WINAPI SetScrollPos(
1218 HWND hwnd /* [I] Handle of window whose scrollbar will be affected */,
1219 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1220 INT nPos /* [I] New value */,
1221 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */ )
1222 {
1223 SCROLLINFO info;
1224 SCROLLBAR_INFO *infoPtr;
1225 INT oldPos;
1226
1227 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1228 oldPos = infoPtr->CurVal;
1229 info.cbSize = sizeof(info);
1230 info.nPos = nPos;
1231 info.fMask = SIF_POS;
1232 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1233 return oldPos;
1234 }
1235
1236
1237 /*************************************************************************
1238 * GetScrollPos16 (USER.63)
1239 */
1240 INT16 WINAPI GetScrollPos16( HWND16 hwnd, INT16 nBar )
1241 {
1242 return (INT16)GetScrollPos( hwnd, nBar );
1243 }
1244
1245
1246 /*************************************************************************
1247 * GetScrollPos32 (USER32.285)
1248 *
1249 * RETURNS
1250 * Success: Current position
1251 * Failure: 0
1252 *
1253 * REMARKS
1254 * Note the ambiguity when 0 is returned. Use GetLastError
1255 * to make sure there was an error (and to know which one).
1256 */
1257 INT WINAPI GetScrollPos(
1258 HWND hwnd, /* [I] Handle of window */
1259 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */)
1260 {
1261 SCROLLBAR_INFO *infoPtr;
1262
1263 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1264 return infoPtr->CurVal;
1265 }
1266
1267
1268 /*************************************************************************
1269 * SetScrollRange16 (USER.64)
1270 */
1271 void WINAPI SetScrollRange16( HWND16 hwnd, INT16 nBar,
1272 INT16 MinVal, INT16 MaxVal, BOOL16 bRedraw )
1273 {
1274 /* Invalid range -> range is set to (0,0) */
1275 if ((INT)MaxVal - (INT)MinVal > 0x7fff) MinVal = MaxVal = 0;
1276 SetScrollRange( hwnd, nBar, MinVal, MaxVal, bRedraw );
1277 }
1278
1279
1280 /*************************************************************************
1281 * SetScrollRange32 (USER32.503)
1282 *
1283 * RETURNS STD
1284 */
1285 BOOL WINAPI SetScrollRange(
1286 HWND hwnd, /* [I] Handle of window whose scrollbar will be affected */
1287 INT nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
1288 INT MinVal, /* [I] New minimum value */
1289 INT MaxVal, /* [I] New maximum value */
1290 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
1291 {
1292 SCROLLINFO info;
1293
1294 info.cbSize = sizeof(info);
1295 info.nMin = MinVal;
1296 info.nMax = MaxVal;
1297 info.fMask = SIF_RANGE;
1298 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1299 return TRUE;
1300 }
1301
1302
1303 /*************************************************************************
1304 * SCROLL_SetNCSbState
1305 *
1306 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1307 */
1308 INT SCROLL_SetNCSbState(WND* wndPtr, int vMin, int vMax, int vPos,
1309 int hMin, int hMax, int hPos)
1310 {
1311 INT vA, hA;
1312 SCROLLINFO vInfo, hInfo;
1313
1314 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1315 vInfo.nMin = vMin; hInfo.nMin = hMin;
1316 vInfo.nMax = vMax; hInfo.nMax = hMax;
1317 vInfo.nPos = vPos; hInfo.nPos = hPos;
1318 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1319
1320 SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_VERT, &vInfo, &vA );
1321 SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_HORZ, &hInfo, &hA );
1322
1323 if( !SCROLL_ShowScrollBar( wndPtr->hwndSelf, SB_BOTH,
1324 (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1325 {
1326 /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1327 if( vA & SA_SSI_REFRESH )
1328 SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_VERT, FALSE, TRUE );
1329
1330 if( hA & SA_SSI_REFRESH )
1331 SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_HORZ, FALSE, TRUE );
1332 }
1333 return 0;
1334 }
1335
1336
1337 /*************************************************************************
1338 * GetScrollRange16 (USER.65)
1339 */
1340 BOOL16 WINAPI GetScrollRange16( HWND16 hwnd, INT16 nBar,
1341 LPINT16 lpMin, LPINT16 lpMax)
1342 {
1343 INT min, max;
1344 BOOL16 ret = GetScrollRange( hwnd, nBar, &min, &max );
1345 if (lpMin) *lpMin = min;
1346 if (lpMax) *lpMax = max;
1347 return ret;
1348 }
1349
1350
1351 /*************************************************************************
1352 * GetScrollRange32 (USER32.286)
1353 *
1354 * RETURNS STD
1355 */
1356 BOOL WINAPI GetScrollRange(
1357 HWND hwnd, /* [I] Handle of window */
1358 INT nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
1359 LPINT lpMin, /* [O] Where to store minimum value */
1360 LPINT lpMax /* [O] Where to store maximum value */)
1361 {
1362 SCROLLBAR_INFO *infoPtr;
1363
1364 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1365 {
1366 if (lpMin) lpMin = 0;
1367 if (lpMax) lpMax = 0;
1368 return FALSE;
1369 }
1370 if (lpMin) *lpMin = infoPtr->MinVal;
1371 if (lpMax) *lpMax = infoPtr->MaxVal;
1372 return TRUE;
1373 }
1374
1375
1376 /*************************************************************************
1377 * SCROLL_ShowScrollBar()
1378 *
1379 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1380 * NOTE: fShowV/fShowH must be zero when nBar is SB_HORZ/SB_VERT.
1381 */
1382 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1383 BOOL fShowH, BOOL fShowV )
1384 {
1385 WND *wndPtr = WIN_FindWndPtr( hwnd );
1386
1387 if (!wndPtr) return FALSE;
1388 TRACE(scroll, "hwnd=%04x bar=%d horz=%d, vert=%d\n",
1389 hwnd, nBar, fShowH, fShowV );
1390
1391 switch(nBar)
1392 {
1393 case SB_CTL:
1394 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1395 return TRUE;
1396
1397 case SB_BOTH:
1398 case SB_HORZ:
1399 if (fShowH)
1400 {
1401 fShowH = !(wndPtr->dwStyle & WS_HSCROLL);
1402 wndPtr->dwStyle |= WS_HSCROLL;
1403 }
1404 else /* hide it */
1405 {
1406 fShowH = (wndPtr->dwStyle & WS_HSCROLL);
1407 wndPtr->dwStyle &= ~WS_HSCROLL;
1408 }
1409 if( nBar == SB_HORZ ) break;
1410 /* fall through */
1411
1412 case SB_VERT:
1413 if (fShowV)
1414 {
1415 fShowV = !(wndPtr->dwStyle & WS_VSCROLL);
1416 wndPtr->dwStyle |= WS_VSCROLL;
1417 }
1418 else /* hide it */
1419 {
1420 fShowV = (wndPtr->dwStyle & WS_VSCROLL);
1421 wndPtr->dwStyle &= ~WS_VSCROLL;
1422 }
1423 break;
1424
1425 default:
1426 return FALSE; /* Nothing to do! */
1427 }
1428
1429 if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1430 {
1431 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1432 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1433 return TRUE;
1434 }
1435
1436 return FALSE; /* no frame changes */
1437 }
1438
1439
1440 /*************************************************************************
1441 * ShowScrollBar16 (USER.267)
1442 */
1443 void WINAPI ShowScrollBar16( HWND16 hwnd, INT16 nBar, BOOL16 fShow )
1444 {
1445 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1446 (nBar == SB_HORZ) ? 0 : fShow );
1447 }
1448
1449
1450 /*************************************************************************
1451 * ShowScrollBar32 (USER32.532)
1452 *
1453 * RETURNS STD
1454 */
1455 BOOL WINAPI ShowScrollBar(
1456 HWND hwnd, /* [I] Handle of window whose scrollbar(s) will be affected */
1457 INT nBar, /* [I] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1458 BOOL fShow /* [I] TRUE = show, FALSE = hide */)
1459 {
1460 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1461 (nBar == SB_HORZ) ? 0 : fShow );
1462 return TRUE;
1463 }
1464
1465
1466 /*************************************************************************
1467 * EnableScrollBar16 (USER.482)
1468 */
1469 BOOL16 WINAPI EnableScrollBar16( HWND16 hwnd, INT16 nBar, UINT16 flags )
1470 {
1471 return EnableScrollBar( hwnd, nBar, flags );
1472 }
1473
1474
1475 /*************************************************************************
1476 * EnableScrollBar32 (USER32.171)
1477 */
1478 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1479 {
1480 BOOL bFineWithMe;
1481 SCROLLBAR_INFO *infoPtr;
1482
1483 TRACE(scroll, "%04x %d %d\n", hwnd, nBar, flags );
1484
1485 flags &= ESB_DISABLE_BOTH;
1486
1487 if (nBar == SB_BOTH)
1488 {
1489 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE;
1490 if (!(bFineWithMe = (infoPtr->flags == flags)) )
1491 {
1492 infoPtr->flags = flags;
1493 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1494 }
1495 nBar = SB_HORZ;
1496 }
1497 else
1498 bFineWithMe = TRUE;
1499
1500 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1501 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1502 infoPtr->flags = flags;
1503
1504 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1505 return TRUE;
1506 }
GSOC 2012 project to enhance the control panel