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CB_GETTEXT: Use lpBuffer instead of lpText for LB_GETTEXT32, handle 0
[wine/multimedia.git] / controls / scroll.c
blobf824cdd3f8169a60135189ab5fb02cf99f189619
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 "graphics.h"
15 #include "heap.h"
16 #include "win.h"
17 #include "debug.h"
18
19
20 static HBITMAP32 hUpArrow = 0;
21 static HBITMAP32 hDnArrow = 0;
22 static HBITMAP32 hLfArrow = 0;
23 static HBITMAP32 hRgArrow = 0;
24 static HBITMAP32 hUpArrowD = 0;
25 static HBITMAP32 hDnArrowD = 0;
26 static HBITMAP32 hLfArrowD = 0;
27 static HBITMAP32 hRgArrowD = 0;
28 static HBITMAP32 hUpArrowI = 0;
29 static HBITMAP32 hDnArrowI = 0;
30 static HBITMAP32 hLfArrowI = 0;
31 static HBITMAP32 hRgArrowI = 0;
32
33 #define TOP_ARROW(flags,pressed) \
34 (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
35 #define BOTTOM_ARROW(flags,pressed) \
36 (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
37 #define LEFT_ARROW(flags,pressed) \
38 (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
39 #define RIGHT_ARROW(flags,pressed) \
40 (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
41
42
43 /* Minimum size of the rectangle between the arrows */
44 #define SCROLL_MIN_RECT 4
45
46 /* Minimum size of the thumb in pixels */
47 #define SCROLL_MIN_THUMB 6
48
49 /* Overlap between arrows and thumb */
50 #define SCROLL_ARROW_THUMB_OVERLAP 1
51
52 /* Delay (in ms) before first repetition when holding the button down */
53 #define SCROLL_FIRST_DELAY 200
54
55 /* Delay (in ms) between scroll repetitions */
56 #define SCROLL_REPEAT_DELAY 50
57
58 /* Scroll timer id */
59 #define SCROLL_TIMER 0
60
61 /* Scroll-bar hit testing */
62 enum SCROLL_HITTEST
63 {
64 SCROLL_NOWHERE, /* Outside the scroll bar */
65 SCROLL_TOP_ARROW, /* Top or left arrow */
66 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
67 SCROLL_THUMB, /* Thumb rectangle */
68 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
69 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
70 };
71
72 /* What to do after SCROLL_SetScrollInfo() */
73 #define SA_SSI_HIDE 0x0001
74 #define SA_SSI_SHOW 0x0002
75 #define SA_SSI_REFRESH 0x0004
76 #define SA_SSI_REPAINT_ARROWS 0x0008
77
78 /* Thumb-tracking info */
79 static HWND32 SCROLL_TrackingWin = 0;
80 static INT32 SCROLL_TrackingBar = 0;
81 static INT32 SCROLL_TrackingPos = 0;
82 static INT32 SCROLL_TrackingVal = 0;
83 /* Hit test code of the last button-down event */
84 static enum SCROLL_HITTEST SCROLL_trackHitTest;
85 static BOOL32 SCROLL_trackVertical;
86
87 /* Is the moving thumb being displayed? */
88 static BOOL32 SCROLL_MovingThumb = FALSE;
89
90 /* Local functions */
91 static BOOL32 SCROLL_ShowScrollBar( HWND32 hwnd, INT32 nBar,
92 BOOL32 fShowH, BOOL32 fShowV );
93 static INT32 SCROLL_SetScrollInfo( HWND32 hwnd, INT32 nBar,
94 const SCROLLINFO *info, INT32 *action );
95
96 /***********************************************************************
97 * SCROLL_LoadBitmaps
98 */
99 static void SCROLL_LoadBitmaps(void)
100 {
101 hUpArrow = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_UPARROW) );
102 hDnArrow = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_DNARROW) );
103 hLfArrow = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_LFARROW) );
104 hRgArrow = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_RGARROW) );
105 hUpArrowD = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_UPARROWD) );
106 hDnArrowD = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_DNARROWD) );
107 hLfArrowD = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_LFARROWD) );
108 hRgArrowD = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_RGARROWD) );
109 hUpArrowI = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_UPARROWI) );
110 hDnArrowI = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_DNARROWI) );
111 hLfArrowI = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_LFARROWI) );
112 hRgArrowI = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_RGARROWI) );
113 }
114
115
116 /***********************************************************************
117 * SCROLL_GetPtrScrollInfo
118 */
119 static SCROLLBAR_INFO *SCROLL_GetPtrScrollInfo( WND* wndPtr, INT32 nBar )
120 {
121 SCROLLBAR_INFO *infoPtr;
122
123 if (!wndPtr) return NULL;
124 switch(nBar)
125 {
126 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
127 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
128 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
129 default: return NULL;
130 }
131
132 if (!infoPtr) /* Create the info structure if needed */
133 {
134 if ((infoPtr = HeapAlloc( SystemHeap, 0, sizeof(SCROLLBAR_INFO) )))
135 {
136 infoPtr->MinVal = infoPtr->CurVal = infoPtr->Page = 0;
137 infoPtr->MaxVal = 100;
138 infoPtr->flags = ESB_ENABLE_BOTH;
139 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
140 else wndPtr->pVScroll = infoPtr;
141 }
142 if (!hUpArrow) SCROLL_LoadBitmaps();
143 }
144 return infoPtr;
145 }
146
147
148 /***********************************************************************
149 * SCROLL_GetScrollInfo
150 */
151 static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND32 hwnd, INT32 nBar )
152 {
153 WND *wndPtr = WIN_FindWndPtr( hwnd );
154 return SCROLL_GetPtrScrollInfo( wndPtr, nBar );
155 }
156
157
158 /***********************************************************************
159 * SCROLL_GetScrollBarRect
160 *
161 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
162 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
163 * 'arrowSize' returns the width or height of an arrow (depending on
164 * the orientation of the scrollbar), 'thumbSize' returns the size of
165 * the thumb, and 'thumbPos' returns the position of the thumb
166 * relative to the left or to the top.
167 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
168 */
169 static BOOL32 SCROLL_GetScrollBarRect( HWND32 hwnd, INT32 nBar, RECT32 *lprect,
170 INT32 *arrowSize, INT32 *thumbSize,
171 INT32 *thumbPos )
172 {
173 INT32 pixels;
174 BOOL32 vertical;
175 WND *wndPtr = WIN_FindWndPtr( hwnd );
176
177 switch(nBar)
178 {
179 case SB_HORZ:
180 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
181 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
182 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
183 lprect->bottom = lprect->top + SYSMETRICS_CYHSCROLL;
184 if(wndPtr->dwStyle & WS_BORDER) {
185 lprect->left--;
186 lprect->right++;
187 } else if(wndPtr->dwStyle & WS_VSCROLL)
188 lprect->right++;
189 vertical = FALSE;
190 break;
191
192 case SB_VERT:
193 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
194 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
195 lprect->right = lprect->left + SYSMETRICS_CXVSCROLL;
196 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
197 if(wndPtr->dwStyle & WS_BORDER) {
198 lprect->top--;
199 lprect->bottom++;
200 } else if(wndPtr->dwStyle & WS_HSCROLL)
201 lprect->bottom++;
202 vertical = TRUE;
203 break;
204
205 case SB_CTL:
206 GetClientRect32( hwnd, lprect );
207 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
208 break;
209
210 default:
211 return FALSE;
212 }
213
214 if (vertical) pixels = lprect->bottom - lprect->top;
215 else pixels = lprect->right - lprect->left;
216
217 if (pixels <= 2*SYSMETRICS_CXVSCROLL + SCROLL_MIN_RECT)
218 {
219 if (pixels > SCROLL_MIN_RECT)
220 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
221 else
222 *arrowSize = 0;
223 *thumbPos = *thumbSize = 0;
224 }
225 else
226 {
227 SCROLLBAR_INFO *info = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
228
229 *arrowSize = SYSMETRICS_CXVSCROLL;
230 pixels -= (2 * (SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP));
231
232 if (info->Page)
233 {
234 *thumbSize = pixels * info->Page / (info->MaxVal-info->MinVal+1);
235 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
236 }
237 else *thumbSize = SYSMETRICS_CXVSCROLL;
238
239 if (((pixels -= *thumbSize ) < 0) ||
240 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
241 {
242 /* Rectangle too small or scrollbar disabled -> no thumb */
243 *thumbPos = *thumbSize = 0;
244 }
245 else
246 {
247 INT32 max = info->MaxVal - MAX( info->Page-1, 0 );
248 if (info->MinVal >= max)
249 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
250 else
251 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
252 + pixels * (info->CurVal-info->MinVal) / (max - info->MinVal);
253 }
254 }
255 return vertical;
256 }
257
258
259 /***********************************************************************
260 * SCROLL_GetThumbVal
261 *
262 * Compute the current scroll position based on the thumb position in pixels
263 * from the top of the scroll-bar.
264 */
265 static UINT32 SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT32 *rect,
266 BOOL32 vertical, INT32 pos )
267 {
268 INT32 thumbSize;
269 INT32 pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
270
271 if ((pixels -= 2*(SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
272 return infoPtr->MinVal;
273
274 if (infoPtr->Page)
275 {
276 thumbSize = pixels * infoPtr->Page/(infoPtr->MaxVal-infoPtr->MinVal+1);
277 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
278 }
279 else thumbSize = SYSMETRICS_CXVSCROLL;
280
281 if ((pixels -= thumbSize) <= 0) return infoPtr->MinVal;
282
283 pos = MAX( 0, pos - (SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP) );
284 if (pos > pixels) pos = pixels;
285
286 if (!infoPtr->Page) pos *= infoPtr->MaxVal - infoPtr->MinVal;
287 else pos *= infoPtr->MaxVal - infoPtr->MinVal - infoPtr->Page + 1;
288 return infoPtr->MinVal + ((pos + pixels / 2) / pixels);
289 }
290
291 /***********************************************************************
292 * SCROLL_PtInRectEx
293 */
294 static BOOL32 SCROLL_PtInRectEx( LPRECT32 lpRect, POINT32 pt, BOOL32 vertical )
295 {
296 RECT32 rect = *lpRect;
297
298 if (vertical)
299 {
300 rect.left -= lpRect->right - lpRect->left;
301 rect.right += lpRect->right - lpRect->left;
302 }
303 else
304 {
305 rect.top -= lpRect->bottom - lpRect->top;
306 rect.bottom += lpRect->bottom - lpRect->top;
307 }
308 return PtInRect32( &rect, pt );
309 }
310
311 /***********************************************************************
312 * SCROLL_ClipPos
313 */
314 static POINT32 SCROLL_ClipPos( LPRECT32 lpRect, POINT32 pt )
315 {
316 if( pt.x < lpRect->left )
317 pt.x = lpRect->left;
318 else
319 if( pt.x > lpRect->right )
320 pt.x = lpRect->right;
321
322 if( pt.y < lpRect->top )
323 pt.y = lpRect->top;
324 else
325 if( pt.y > lpRect->bottom )
326 pt.y = lpRect->bottom;
327
328 return pt;
329 }
330
331
332 /***********************************************************************
333 * SCROLL_HitTest
334 *
335 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
336 */
337 static enum SCROLL_HITTEST SCROLL_HitTest( HWND32 hwnd, INT32 nBar,
338 POINT32 pt, BOOL32 bDragging )
339 {
340 INT32 arrowSize, thumbSize, thumbPos;
341 RECT32 rect;
342
343 BOOL32 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
344 &arrowSize, &thumbSize, &thumbPos );
345
346 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
347 (!PtInRect32( &rect, pt )) ) return SCROLL_NOWHERE;
348
349 if (vertical)
350 {
351 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
352 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
353 if (!thumbPos) return SCROLL_TOP_RECT;
354 pt.y -= rect.top;
355 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
356 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
357 }
358 else /* horizontal */
359 {
360 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
361 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
362 if (!thumbPos) return SCROLL_TOP_RECT;
363 pt.x -= rect.left;
364 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
365 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
366 }
367 return SCROLL_THUMB;
368 }
369
370
371 /***********************************************************************
372 * SCROLL_DrawArrows
373 *
374 * Draw the scroll bar arrows.
375 */
376 static void SCROLL_DrawArrows( HDC32 hdc, SCROLLBAR_INFO *infoPtr,
377 RECT32 *rect, INT32 arrowSize, BOOL32 vertical,
378 BOOL32 top_pressed, BOOL32 bottom_pressed )
379 {
380 HDC32 hdcMem = CreateCompatibleDC32( hdc );
381 HBITMAP32 hbmpPrev = SelectObject32( hdcMem, vertical ?
382 TOP_ARROW(infoPtr->flags, top_pressed)
383 : LEFT_ARROW(infoPtr->flags, top_pressed));
384
385 SetStretchBltMode32( hdc, STRETCH_DELETESCANS );
386 StretchBlt32( hdc, rect->left, rect->top,
387 vertical ? rect->right-rect->left : arrowSize,
388 vertical ? arrowSize : rect->bottom-rect->top,
389 hdcMem, 0, 0,
390 SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL,
391 SRCCOPY );
392
393 SelectObject32( hdcMem, vertical ?
394 BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
395 : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
396 if (vertical)
397 StretchBlt32( hdc, rect->left, rect->bottom - arrowSize,
398 rect->right - rect->left, arrowSize,
399 hdcMem, 0, 0,
400 SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL,
401 SRCCOPY );
402 else
403 StretchBlt32( hdc, rect->right - arrowSize, rect->top,
404 arrowSize, rect->bottom - rect->top,
405 hdcMem, 0, 0,
406 SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL,
407 SRCCOPY );
408 SelectObject32( hdcMem, hbmpPrev );
409 DeleteDC32( hdcMem );
410 }
411
412
413 /***********************************************************************
414 * SCROLL_DrawMovingThumb
415 *
416 * Draw the moving thumb rectangle.
417 */
418 static void SCROLL_DrawMovingThumb( HDC32 hdc, RECT32 *rect, BOOL32 vertical,
419 INT32 arrowSize, INT32 thumbSize )
420 {
421 RECT32 r = *rect;
422 if (vertical)
423 {
424 r.top += SCROLL_TrackingPos;
425 if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
426 r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
427 if (r.top + thumbSize >
428 rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
429 r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
430 - thumbSize;
431 r.bottom = r.top + thumbSize;
432 }
433 else
434 {
435 r.left += SCROLL_TrackingPos;
436 if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
437 r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
438 if (r.left + thumbSize >
439 rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
440 r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
441 - thumbSize;
442 r.right = r.left + thumbSize;
443 }
444 DrawFocusRect32( hdc, &r );
445 SCROLL_MovingThumb = !SCROLL_MovingThumb;
446 }
447
448
449 /***********************************************************************
450 * SCROLL_DrawInterior
451 *
452 * Draw the scroll bar interior (everything except the arrows).
453 */
454 static void SCROLL_DrawInterior( HWND32 hwnd, HDC32 hdc, INT32 nBar,
455 RECT32 *rect, INT32 arrowSize,
456 INT32 thumbSize, INT32 thumbPos,
457 UINT32 flags, BOOL32 vertical,
458 BOOL32 top_selected, BOOL32 bottom_selected )
459 {
460 RECT32 r;
461
462 /* Select the correct brush and pen */
463
464 SelectObject32( hdc, GetSysColorPen32(COLOR_WINDOWFRAME) );
465 if ((flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
466 {
467 /* This ought to be the color of the parent window */
468 SelectObject32( hdc, GetSysColorBrush32(COLOR_WINDOW) );
469 }
470 else
471 {
472 if (nBar == SB_CTL) /* Only scrollbar controls send WM_CTLCOLOR */
473 {
474 HBRUSH32 hbrush = SendMessage32A(GetParent32(hwnd),
475 WM_CTLCOLORSCROLLBAR, hdc, hwnd );
476 SelectObject32( hdc, hbrush );
477 }
478 else SelectObject32( hdc, GetSysColorBrush32(COLOR_SCROLLBAR) );
479 }
480
481 /* Calculate the scroll rectangle */
482
483 r = *rect;
484 if (vertical)
485 {
486 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
487 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
488 }
489 else
490 {
491 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
492 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
493 }
494
495 /* Draw the scroll bar frame */
496
497 GRAPH_DrawRectangle( hdc, r.left, r.top, r.right - r.left, r.bottom - r.top, 0);
498
499 /* Draw the scroll rectangles and thumb */
500
501 if (!thumbPos) /* No thumb to draw */
502 {
503 PatBlt32( hdc, r.left+1, r.top+1, r.right - r.left - 2,
504 r.bottom - r.top - 2, PATCOPY );
505 return;
506 }
507
508 if (vertical)
509 {
510 PatBlt32( hdc, r.left + 1, r.top + 1,
511 r.right - r.left - 2,
512 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - 1,
513 top_selected ? 0x0f0000 : PATCOPY );
514 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
515 PatBlt32( hdc, r.left + 1, r.top + thumbSize,
516 r.right - r.left - 2,
517 r.bottom - r.top - thumbSize - 1,
518 bottom_selected ? 0x0f0000 : PATCOPY );
519 r.bottom = r.top + thumbSize;
520 }
521 else /* horizontal */
522 {
523 PatBlt32( hdc, r.left + 1, r.top + 1,
524 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - 1,
525 r.bottom - r.top - 2,
526 top_selected ? 0x0f0000 : PATCOPY );
527 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
528 PatBlt32( hdc, r.left + thumbSize, r.top + 1,
529 r.right - r.left - thumbSize - 1,
530 r.bottom - r.top - 2,
531 bottom_selected ? 0x0f0000 : PATCOPY );
532 r.right = r.left + thumbSize;
533 }
534
535 /* Draw the thumb */
536
537 SelectObject32( hdc, GetSysColorBrush32(COLOR_BTNFACE) );
538 Rectangle32( hdc, r.left, r.top, r.right, r.bottom );
539 InflateRect32( &r, -1, -1 );
540 GRAPH_DrawReliefRect( hdc, &r, 1, 2, FALSE );
541 if (SCROLL_MovingThumb &&
542 (SCROLL_TrackingWin == hwnd) &&
543 (SCROLL_TrackingBar == nBar))
544 {
545 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
546 SCROLL_MovingThumb = TRUE;
547 }
548 }
549
550
551 /***********************************************************************
552 * SCROLL_DrawScrollBar
553 *
554 * Redraw the whole scrollbar.
555 */
556 void SCROLL_DrawScrollBar( HWND32 hwnd, HDC32 hdc, INT32 nBar,
557 BOOL32 arrows, BOOL32 interior )
558 {
559 INT32 arrowSize, thumbSize, thumbPos;
560 RECT32 rect;
561 BOOL32 vertical;
562 WND *wndPtr = WIN_FindWndPtr( hwnd );
563 SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
564
565 if (!wndPtr || !infoPtr ||
566 ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
567 ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) return;
568 if (!WIN_IsWindowDrawable( wndPtr, FALSE )) return;
569
570 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
571 &arrowSize, &thumbSize, &thumbPos );
572
573 /* Draw the arrows */
574
575 if (arrows && arrowSize)
576 {
577 if( vertical == SCROLL_trackVertical && GetCapture32() == hwnd )
578 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
579 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
580 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
581 else
582 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
583 FALSE, FALSE );
584 }
585 if( interior )
586 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
587 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
588 }
589
590
591 /***********************************************************************
592 * SCROLL_RefreshScrollBar
593 *
594 * Repaint the scroll bar interior after a SetScrollRange() or
595 * SetScrollPos() call.
596 */
597 static void SCROLL_RefreshScrollBar( HWND32 hwnd, INT32 nBar,
598 BOOL32 arrows, BOOL32 interior )
599 {
600 HDC32 hdc = GetDCEx32( hwnd, 0,
601 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
602 if (!hdc) return;
603
604 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
605 ReleaseDC32( hwnd, hdc );
606 }
607
608
609 /***********************************************************************
610 * SCROLL_HandleKbdEvent
611 *
612 * Handle a keyboard event (only for SB_CTL scrollbars).
613 */
614 static void SCROLL_HandleKbdEvent( HWND32 hwnd, WPARAM32 wParam )
615 {
616 WND *wndPtr = WIN_FindWndPtr( hwnd );
617 WPARAM32 msg;
618
619 switch(wParam)
620 {
621 case VK_PRIOR: msg = SB_PAGEUP; break;
622 case VK_NEXT: msg = SB_PAGEDOWN; break;
623 case VK_HOME: msg = SB_TOP; break;
624 case VK_END: msg = SB_BOTTOM; break;
625 case VK_UP: msg = SB_LINEUP; break;
626 case VK_DOWN: msg = SB_LINEDOWN; break;
627 default:
628 return;
629 }
630 SendMessage32A( GetParent32(hwnd),
631 (wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
632 msg, hwnd );
633 }
634
635
636 /***********************************************************************
637 * SCROLL_HandleScrollEvent
638 *
639 * Handle a mouse or timer event for the scrollbar.
640 * 'pt' is the location of the mouse event in client (for SB_CTL) or
641 * windows coordinates.
642 */
643 void SCROLL_HandleScrollEvent( HWND32 hwnd, INT32 nBar, UINT32 msg, POINT32 pt)
644 {
645 /* Previous mouse position for timer events */
646 static POINT32 prevPt;
647 /* Thumb position when tracking started. */
648 static UINT32 trackThumbPos;
649 /* Position in the scroll-bar of the last button-down event. */
650 static INT32 lastClickPos;
651 /* Position in the scroll-bar of the last mouse event. */
652 static INT32 lastMousePos;
653
654 enum SCROLL_HITTEST hittest;
655 HWND32 hwndOwner, hwndCtl;
656 BOOL32 vertical;
657 INT32 arrowSize, thumbSize, thumbPos;
658 RECT32 rect;
659 HDC32 hdc;
660
661 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
662 if (!infoPtr) return;
663 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
664 return;
665
666 hdc = GetDCEx32( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
667 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
668 &arrowSize, &thumbSize, &thumbPos );
669 hwndOwner = (nBar == SB_CTL) ? GetParent32(hwnd) : hwnd;
670 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
671
672 switch(msg)
673 {
674 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
675 SCROLL_trackVertical = vertical;
676 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
677 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
678 lastMousePos = lastClickPos;
679 trackThumbPos = thumbPos;
680 prevPt = pt;
681 SetCapture32( hwnd );
682 if (nBar == SB_CTL) SetFocus32( hwnd );
683 break;
684
685 case WM_MOUSEMOVE:
686 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
687 prevPt = pt;
688 break;
689
690 case WM_LBUTTONUP:
691 hittest = SCROLL_NOWHERE;
692 ReleaseCapture();
693 break;
694
695 case WM_SYSTIMER:
696 pt = prevPt;
697 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
698 break;
699
700 default:
701 return; /* Should never happen */
702 }
703
704 TRACE(scroll, "Event: hwnd=%04x bar=%d msg=%x pt=%d,%d hit=%d\n",
705 hwnd, nBar, msg, pt.x, pt.y, hittest );
706
707 switch(SCROLL_trackHitTest)
708 {
709 case SCROLL_NOWHERE: /* No tracking in progress */
710 break;
711
712 case SCROLL_TOP_ARROW:
713 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
714 (hittest == SCROLL_trackHitTest), FALSE );
715 if (hittest == SCROLL_trackHitTest)
716 {
717 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
718 {
719 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
720 SB_LINEUP, hwndCtl );
721 SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
722 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
723 (TIMERPROC32)0 );
724 }
725 }
726 else KillSystemTimer32( hwnd, SCROLL_TIMER );
727 break;
728
729 case SCROLL_TOP_RECT:
730 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
731 thumbPos, infoPtr->flags, vertical,
732 (hittest == SCROLL_trackHitTest), FALSE );
733 if (hittest == SCROLL_trackHitTest)
734 {
735 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
736 {
737 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
738 SB_PAGEUP, hwndCtl );
739 SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
740 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
741 (TIMERPROC32)0 );
742 }
743 }
744 else KillSystemTimer32( hwnd, SCROLL_TIMER );
745 break;
746
747 case SCROLL_THUMB:
748 if (msg == WM_LBUTTONDOWN)
749 {
750 SCROLL_TrackingWin = hwnd;
751 SCROLL_TrackingBar = nBar;
752 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
753 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
754 }
755 else if (msg == WM_LBUTTONUP)
756 {
757 SCROLL_TrackingWin = 0;
758 SCROLL_MovingThumb = FALSE;
759 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
760 thumbPos, infoPtr->flags, vertical,
761 FALSE, FALSE );
762 }
763 else /* WM_MOUSEMOVE */
764 {
765 UINT32 pos;
766
767 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
768 else
769 {
770 pt = SCROLL_ClipPos( &rect, pt );
771 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
772 }
773 if (pos != lastMousePos)
774 {
775 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
776 arrowSize, thumbSize );
777 lastMousePos = pos;
778 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
779 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
780 vertical,
781 SCROLL_TrackingPos );
782 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
783 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
784 hwndCtl );
785 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
786 arrowSize, thumbSize );
787 }
788 }
789 break;
790
791 case SCROLL_BOTTOM_RECT:
792 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
793 thumbPos, infoPtr->flags, vertical,
794 FALSE, (hittest == SCROLL_trackHitTest) );
795 if (hittest == SCROLL_trackHitTest)
796 {
797 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
798 {
799 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
800 SB_PAGEDOWN, hwndCtl );
801 SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
802 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
803 (TIMERPROC32)0 );
804 }
805 }
806 else KillSystemTimer32( hwnd, SCROLL_TIMER );
807 break;
808
809 case SCROLL_BOTTOM_ARROW:
810 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
811 FALSE, (hittest == SCROLL_trackHitTest) );
812 if (hittest == SCROLL_trackHitTest)
813 {
814 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
815 {
816 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
817 SB_LINEDOWN, hwndCtl );
818 SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
819 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
820 (TIMERPROC32)0 );
821 }
822 }
823 else KillSystemTimer32( hwnd, SCROLL_TIMER );
824 break;
825 }
826
827 if (msg == WM_LBUTTONUP)
828 {
829 hittest = SCROLL_trackHitTest;
830 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
831
832 if (hittest == SCROLL_THUMB)
833 {
834 UINT32 val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
835 trackThumbPos + lastMousePos - lastClickPos );
836 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
837 MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl );
838 }
839 else
840 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
841 SB_ENDSCROLL, hwndCtl );
842 }
843
844 ReleaseDC32( hwnd, hdc );
845 }
846
847
848 /***********************************************************************
849 * ScrollBarWndProc
850 */
851 LRESULT WINAPI ScrollBarWndProc( HWND32 hwnd, UINT32 message, WPARAM32 wParam,
852 LPARAM lParam )
853 {
854 switch(message)
855 {
856 case WM_CREATE:
857 {
858 CREATESTRUCT32A *lpCreat = (CREATESTRUCT32A *)lParam;
859 if (lpCreat->style & SBS_SIZEBOX)
860 {
861 FIXME(scroll, "Unimplemented style SBS_SIZEBOX.\n" );
862 return 0;
863 }
864
865 if (lpCreat->style & SBS_VERT)
866 {
867 if (lpCreat->style & SBS_LEFTALIGN)
868 MoveWindow32( hwnd, lpCreat->x, lpCreat->y,
869 SYSMETRICS_CXVSCROLL+1, lpCreat->cy, FALSE );
870 else if (lpCreat->style & SBS_RIGHTALIGN)
871 MoveWindow32( hwnd,
872 lpCreat->x+lpCreat->cx-SYSMETRICS_CXVSCROLL-1,
873 lpCreat->y,
874 SYSMETRICS_CXVSCROLL+1, lpCreat->cy, FALSE );
875 }
876 else /* SBS_HORZ */
877 {
878 if (lpCreat->style & SBS_TOPALIGN)
879 MoveWindow32( hwnd, lpCreat->x, lpCreat->y,
880 lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE );
881 else if (lpCreat->style & SBS_BOTTOMALIGN)
882 MoveWindow32( hwnd,
883 lpCreat->x,
884 lpCreat->y+lpCreat->cy-SYSMETRICS_CYHSCROLL-1,
885 lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE );
886 }
887 }
888 if (!hUpArrow) SCROLL_LoadBitmaps();
889 TRACE(scroll, "ScrollBar creation, hwnd=%04x\n", hwnd );
890 return 0;
891
892 case WM_LBUTTONDOWN:
893 case WM_LBUTTONUP:
894 case WM_MOUSEMOVE:
895 case WM_SYSTIMER:
896 {
897 POINT32 pt;
898 CONV_POINT16TO32( (POINT16 *)&lParam, &pt );
899 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
900 }
901 break;
902
903 case WM_KEYDOWN:
904 SCROLL_HandleKbdEvent( hwnd, wParam );
905 break;
906
907 case WM_ERASEBKGND:
908 return 1;
909
910 case WM_GETDLGCODE:
911 return DLGC_WANTARROWS; /* Windows returns this value */
912
913 case WM_PAINT:
914 {
915 PAINTSTRUCT32 ps;
916 HDC32 hdc = BeginPaint32( hwnd, &ps );
917 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
918 EndPaint32( hwnd, &ps );
919 }
920 break;
921
922 case SBM_SETPOS16:
923 case SBM_SETPOS32:
924 return SetScrollPos32( hwnd, SB_CTL, wParam, (BOOL32)lParam );
925
926 case SBM_GETPOS16:
927 case SBM_GETPOS32:
928 return GetScrollPos32( hwnd, SB_CTL );
929
930 case SBM_SETRANGE16:
931 SetScrollRange32( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
932 wParam /* FIXME: Is this correct? */ );
933 return 0;
934
935 case SBM_SETRANGE32:
936 SetScrollRange32( hwnd, SB_CTL, wParam, lParam, FALSE );
937 return 0; /* FIXME: return previous position */
938
939 case SBM_GETRANGE16:
940 FIXME(scroll, "don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
941 return 0;
942
943 case SBM_GETRANGE32:
944 GetScrollRange32( hwnd, SB_CTL, (LPINT32)wParam, (LPINT32)lParam );
945 return 0;
946
947 case SBM_ENABLE_ARROWS16:
948 case SBM_ENABLE_ARROWS32:
949 return EnableScrollBar32( hwnd, SB_CTL, wParam );
950
951 case SBM_SETRANGEREDRAW32:
952 SetScrollRange32( hwnd, SB_CTL, wParam, lParam, TRUE );
953 return 0; /* FIXME: return previous position */
954
955 case SBM_SETSCROLLINFO32:
956 return SetScrollInfo32( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
957
958 case SBM_GETSCROLLINFO32:
959 return GetScrollInfo32( hwnd, SB_CTL, (SCROLLINFO *)lParam );
960
961 case 0x00e5:
962 case 0x00e7:
963 case 0x00e8:
964 case 0x00eb:
965 case 0x00ec:
966 case 0x00ed:
967 case 0x00ee:
968 case 0x00ef:
969 ERR(scroll, "unknown Win32 msg %04x wp=%08x lp=%08lx\n",
970 message, wParam, lParam );
971 break;
972
973 default:
974 if (message >= WM_USER)
975 WARN(scroll, "unknown msg %04x wp=%04x lp=%08lx\n",
976 message, wParam, lParam );
977 return DefWindowProc32A( hwnd, message, wParam, lParam );
978 }
979 return 0;
980 }
981
982
983 /*************************************************************************
984 * SetScrollInfo16 (USER.475)
985 */
986 INT16 WINAPI SetScrollInfo16( HWND16 hwnd, INT16 nBar, const SCROLLINFO *info,
987 BOOL16 bRedraw )
988 {
989 return (INT16)SetScrollInfo32( hwnd, nBar, info, bRedraw );
990 }
991
992
993 /*************************************************************************
994 * SetScrollInfo32 (USER32.501)
995 * SetScrollInfo32 can be used to set the position, upper bound,
996 * lower bound, and page size of a scrollbar control.
997 *
998 * RETURNS
999 * Scrollbar position
1000 *
1001 * NOTE
1002 * For 100 lines of text to be displayed in a window of 25 lines,
1003 * one would for instance use info->nMin=0, info->nMax=75
1004 * (corresponding to the 76 different positions of the window on
1005 * the text), and info->nPage=25.
1006 */
1007 INT32 WINAPI SetScrollInfo32(
1008 HWND32 hwnd /* [I] Handle of window whose scrollbar will be affected */,
1009 INT32 nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1010 const SCROLLINFO *info /* [I] Specifies what to change and new values */,
1011 BOOL32 bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
1012 {
1013 INT32 action;
1014 INT32 retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1015
1016 if( action & SA_SSI_HIDE )
1017 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1018 else
1019 {
1020 if( action & SA_SSI_SHOW )
1021 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1022 return retVal; /* SetWindowPos() already did the painting */
1023
1024 if( bRedraw && (action & SA_SSI_REFRESH))
1025 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1026 else if( action & SA_SSI_REPAINT_ARROWS )
1027 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1028 }
1029 return retVal;
1030 }
1031
1032 INT32 SCROLL_SetScrollInfo( HWND32 hwnd, INT32 nBar,
1033 const SCROLLINFO *info, INT32 *action )
1034 {
1035 /* Update the scrollbar state and set action flags according to
1036 * what has to be done graphics wise. */
1037
1038 SCROLLBAR_INFO *infoPtr;
1039 UINT32 new_flags;
1040
1041 dbg_decl_str(scroll, 256);
1042
1043 *action = 0;
1044
1045 if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
1046 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1047 if ((info->cbSize != sizeof(*info)) &&
1048 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1049
1050 /* Set the page size */
1051
1052 if (info->fMask & SIF_PAGE)
1053 {
1054 dsprintf(scroll, " page=%d", info->nPage );
1055 if( infoPtr->Page != info->nPage )
1056 {
1057 infoPtr->Page = info->nPage;
1058 *action |= SA_SSI_REFRESH;
1059 }
1060 }
1061
1062 /* Set the scroll pos */
1063
1064 if (info->fMask & SIF_POS)
1065 {
1066 dsprintf(scroll, " pos=%d", info->nPos );
1067 if( infoPtr->CurVal != info->nPos )
1068 {
1069 infoPtr->CurVal = info->nPos;
1070 *action |= SA_SSI_REFRESH;
1071 }
1072 }
1073
1074 /* Set the scroll range */
1075
1076 if (info->fMask & SIF_RANGE)
1077 {
1078 dsprintf(scroll, " min=%d max=%d", info->nMin, info->nMax );
1079
1080 /* Invalid range -> range is set to (0,0) */
1081 if ((info->nMin > info->nMax) ||
1082 ((UINT32)(info->nMax - info->nMin) >= 0x80000000))
1083 {
1084 infoPtr->MinVal = 0;
1085 infoPtr->MaxVal = 0;
1086 }
1087 else
1088 {
1089 if( infoPtr->MinVal != info->nMin ||
1090 infoPtr->MaxVal != info->nMax )
1091 {
1092 *action |= SA_SSI_REFRESH;
1093 infoPtr->MinVal = info->nMin;
1094 infoPtr->MaxVal = info->nMax;
1095 }
1096 }
1097 }
1098
1099 TRACE(scroll, "hwnd=%04x bar=%d %s\n",
1100 hwnd, nBar, dbg_str(scroll));
1101
1102 /* Make sure the page size is valid */
1103
1104 if (infoPtr->Page < 0) infoPtr->Page = 0;
1105 else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 )
1106 infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1;
1107
1108 /* Make sure the pos is inside the range */
1109
1110 if (infoPtr->CurVal < infoPtr->MinVal)
1111 infoPtr->CurVal = infoPtr->MinVal;
1112 else if (infoPtr->CurVal > infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1113 infoPtr->CurVal = infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 );
1114
1115 TRACE(scroll, " new values: page=%d pos=%d min=%d max=%d\n",
1116 infoPtr->Page, infoPtr->CurVal,
1117 infoPtr->MinVal, infoPtr->MaxVal );
1118
1119 /* Check if the scrollbar should be hidden or disabled */
1120
1121 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1122 {
1123 new_flags = infoPtr->flags;
1124 if (infoPtr->MinVal >= infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1125 {
1126 /* Hide or disable scroll-bar */
1127 if (info->fMask & SIF_DISABLENOSCROLL)
1128 {
1129 new_flags = ESB_DISABLE_BOTH;
1130 *action |= SA_SSI_REFRESH;
1131 }
1132 else if (nBar != SB_CTL)
1133 {
1134 *action = SA_SSI_HIDE;
1135 goto done;
1136 }
1137 }
1138 else /* Show and enable scroll-bar */
1139 {
1140 new_flags = 0;
1141 if (nBar != SB_CTL)
1142 *action |= SA_SSI_SHOW;
1143 }
1144
1145 if (infoPtr->flags != new_flags) /* check arrow flags */
1146 {
1147 infoPtr->flags = new_flags;
1148 *action |= SA_SSI_REPAINT_ARROWS;
1149 }
1150 }
1151
1152 done:
1153 /* Return current position */
1154
1155 return infoPtr->CurVal;
1156 }
1157
1158
1159 /*************************************************************************
1160 * GetScrollInfo16 (USER.476)
1161 */
1162 BOOL16 WINAPI GetScrollInfo16( HWND16 hwnd, INT16 nBar, LPSCROLLINFO info )
1163 {
1164 return GetScrollInfo32( hwnd, nBar, info );
1165 }
1166
1167
1168 /*************************************************************************
1169 * GetScrollInfo32 (USER32.284)
1170 * GetScrollInfo32 can be used to retrieve the position, upper bound,
1171 * lower bound, and page size of a scrollbar control.
1172 *
1173 * RETURNS STD
1174 */
1175 BOOL32 WINAPI GetScrollInfo32(
1176 HWND32 hwnd /* [I] Handle of window */ ,
1177 INT32 nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1178 LPSCROLLINFO info /* [IO] (info.fMask [I] specifies which values are to retrieve) */)
1179 {
1180 SCROLLBAR_INFO *infoPtr;
1181
1182 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1183 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1184 if ((info->cbSize != sizeof(*info)) &&
1185 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1186
1187 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page;
1188 if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal;
1189 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1190 info->nTrackPos = (SCROLL_TrackingWin==hwnd) ? SCROLL_TrackingVal : 0;
1191 if (info->fMask & SIF_RANGE)
1192 {
1193 info->nMin = infoPtr->MinVal;
1194 info->nMax = infoPtr->MaxVal;
1195 }
1196 return (info->fMask & SIF_ALL) != 0;
1197 }
1198
1199
1200 /*************************************************************************
1201 * SetScrollPos16 (USER.62)
1202 */
1203 INT16 WINAPI SetScrollPos16( HWND16 hwnd, INT16 nBar, INT16 nPos,
1204 BOOL16 bRedraw )
1205 {
1206 return (INT16)SetScrollPos32( hwnd, nBar, nPos, bRedraw );
1207 }
1208
1209
1210 /*************************************************************************
1211 * SetScrollPos32 (USER32.502)
1212 *
1213 * RETURNS
1214 * Success: Scrollbar position
1215 * Failure: 0
1216 *
1217 * REMARKS
1218 * Note the ambiguity when 0 is returned. Use GetLastError
1219 * to make sure there was an error (and to know which one).
1220 */
1221 INT32 WINAPI SetScrollPos32(
1222 HWND32 hwnd /* [I] Handle of window whose scrollbar will be affected */,
1223 INT32 nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1224 INT32 nPos /* [I] New value */,
1225 BOOL32 bRedraw /* [I] Should scrollbar be redrawn afterwards ? */ )
1226 {
1227 SCROLLINFO info;
1228 SCROLLBAR_INFO *infoPtr;
1229 INT32 oldPos;
1230
1231 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1232 oldPos = infoPtr->CurVal;
1233 info.cbSize = sizeof(info);
1234 info.nPos = nPos;
1235 info.fMask = SIF_POS;
1236 SetScrollInfo32( hwnd, nBar, &info, bRedraw );
1237 return oldPos;
1238 }
1239
1240
1241 /*************************************************************************
1242 * GetScrollPos16 (USER.63)
1243 */
1244 INT16 WINAPI GetScrollPos16( HWND16 hwnd, INT16 nBar )
1245 {
1246 return (INT16)GetScrollPos32( hwnd, nBar );
1247 }
1248
1249
1250 /*************************************************************************
1251 * GetScrollPos32 (USER32.285)
1252 *
1253 * RETURNS
1254 * Success: Current position
1255 * Failure: 0
1256 *
1257 * REMARKS
1258 * Note the ambiguity when 0 is returned. Use GetLastError
1259 * to make sure there was an error (and to know which one).
1260 */
1261 INT32 WINAPI GetScrollPos32(
1262 HWND32 hwnd, /* [I] Handle of window */
1263 INT32 nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */)
1264 {
1265 SCROLLBAR_INFO *infoPtr;
1266
1267 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1268 return infoPtr->CurVal;
1269 }
1270
1271
1272 /*************************************************************************
1273 * SetScrollRange16 (USER.64)
1274 */
1275 void WINAPI SetScrollRange16( HWND16 hwnd, INT16 nBar,
1276 INT16 MinVal, INT16 MaxVal, BOOL16 bRedraw )
1277 {
1278 /* Invalid range -> range is set to (0,0) */
1279 if ((INT32)MaxVal - (INT32)MinVal > 0x7fff) MinVal = MaxVal = 0;
1280 SetScrollRange32( hwnd, nBar, MinVal, MaxVal, bRedraw );
1281 }
1282
1283
1284 /*************************************************************************
1285 * SetScrollRange32 (USER32.503)
1286 *
1287 * RETURNS STD
1288 */
1289 BOOL32 WINAPI SetScrollRange32(
1290 HWND32 hwnd, /* [I] Handle of window whose scrollbar will be affected */
1291 INT32 nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
1292 INT32 MinVal, /* [I] New minimum value */
1293 INT32 MaxVal, /* [I] New maximum value */
1294 BOOL32 bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
1295 {
1296 SCROLLINFO info;
1297
1298 info.cbSize = sizeof(info);
1299 info.nMin = MinVal;
1300 info.nMax = MaxVal;
1301 info.fMask = SIF_RANGE;
1302 SetScrollInfo32( hwnd, nBar, &info, bRedraw );
1303 return TRUE;
1304 }
1305
1306
1307 /*************************************************************************
1308 * SCROLL_SetNCSbState
1309 *
1310 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1311 */
1312 INT32 SCROLL_SetNCSbState(WND* wndPtr, int vMin, int vMax, int vPos,
1313 int hMin, int hMax, int hPos)
1314 {
1315 INT32 vA, hA;
1316 SCROLLINFO vInfo, hInfo;
1317
1318 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1319 vInfo.nMin = vMin; hInfo.nMin = hMin;
1320 vInfo.nMax = vMax; hInfo.nMax = hMax;
1321 vInfo.nPos = vPos; hInfo.nPos = hPos;
1322 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1323
1324 SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_VERT, &vInfo, &vA );
1325 SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_HORZ, &hInfo, &hA );
1326
1327 if( !SCROLL_ShowScrollBar( wndPtr->hwndSelf, SB_BOTH,
1328 (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1329 {
1330 /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1331 if( vA & SA_SSI_REFRESH )
1332 SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_VERT, FALSE, TRUE );
1333
1334 if( hA & SA_SSI_REFRESH )
1335 SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_HORZ, FALSE, TRUE );
1336 }
1337 return 0;
1338 }
1339
1340
1341 /*************************************************************************
1342 * GetScrollRange16 (USER.65)
1343 */
1344 BOOL16 WINAPI GetScrollRange16( HWND16 hwnd, INT16 nBar,
1345 LPINT16 lpMin, LPINT16 lpMax)
1346 {
1347 INT32 min, max;
1348 BOOL16 ret = GetScrollRange32( hwnd, nBar, &min, &max );
1349 if (lpMin) *lpMin = min;
1350 if (lpMax) *lpMax = max;
1351 return ret;
1352 }
1353
1354
1355 /*************************************************************************
1356 * GetScrollRange32 (USER32.286)
1357 *
1358 * RETURNS STD
1359 */
1360 BOOL32 WINAPI GetScrollRange32(
1361 HWND32 hwnd, /* [I] Handle of window */
1362 INT32 nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
1363 LPINT32 lpMin, /* [O] Where to store minimum value */
1364 LPINT32 lpMax /* [O] Where to store maximum value */)
1365 {
1366 SCROLLBAR_INFO *infoPtr;
1367
1368 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1369 {
1370 if (lpMin) lpMin = 0;
1371 if (lpMax) lpMax = 0;
1372 return FALSE;
1373 }
1374 if (lpMin) *lpMin = infoPtr->MinVal;
1375 if (lpMax) *lpMax = infoPtr->MaxVal;
1376 return TRUE;
1377 }
1378
1379
1380 /*************************************************************************
1381 * SCROLL_ShowScrollBar()
1382 *
1383 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1384 * NOTE: fShowV/fShowH must be zero when nBar is SB_HORZ/SB_VERT.
1385 */
1386 BOOL32 SCROLL_ShowScrollBar( HWND32 hwnd, INT32 nBar,
1387 BOOL32 fShowH, BOOL32 fShowV )
1388 {
1389 WND *wndPtr = WIN_FindWndPtr( hwnd );
1390
1391 if (!wndPtr) return FALSE;
1392 TRACE(scroll, "hwnd=%04x bar=%d horz=%d, vert=%d\n",
1393 hwnd, nBar, fShowH, fShowV );
1394
1395 switch(nBar)
1396 {
1397 case SB_CTL:
1398 ShowWindow32( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1399 return TRUE;
1400
1401 case SB_BOTH:
1402 case SB_HORZ:
1403 if (fShowH)
1404 {
1405 fShowH = !(wndPtr->dwStyle & WS_HSCROLL);
1406 wndPtr->dwStyle |= WS_HSCROLL;
1407 }
1408 else /* hide it */
1409 {
1410 fShowH = (wndPtr->dwStyle & WS_HSCROLL);
1411 wndPtr->dwStyle &= ~WS_HSCROLL;
1412 }
1413 if( nBar == SB_HORZ ) break;
1414 /* fall through */
1415
1416 case SB_VERT:
1417 if (fShowV)
1418 {
1419 fShowV = !(wndPtr->dwStyle & WS_VSCROLL);
1420 wndPtr->dwStyle |= WS_VSCROLL;
1421 }
1422 else /* hide it */
1423 {
1424 fShowV = (wndPtr->dwStyle & WS_VSCROLL);
1425 wndPtr->dwStyle &= ~WS_VSCROLL;
1426 }
1427 break;
1428
1429 default:
1430 return FALSE; /* Nothing to do! */
1431 }
1432
1433 if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1434 {
1435 SetWindowPos32( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1436 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1437 return TRUE;
1438 }
1439
1440 return FALSE; /* no frame changes */
1441 }
1442
1443
1444 /*************************************************************************
1445 * ShowScrollBar16 (USER.267)
1446 */
1447 void WINAPI ShowScrollBar16( HWND16 hwnd, INT16 nBar, BOOL16 fShow )
1448 {
1449 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1450 (nBar == SB_HORZ) ? 0 : fShow );
1451 }
1452
1453
1454 /*************************************************************************
1455 * ShowScrollBar32 (USER32.532)
1456 *
1457 * RETURNS STD
1458 */
1459 BOOL32 WINAPI ShowScrollBar32(
1460 HWND32 hwnd, /* [I] Handle of window whose scrollbar(s) will be affected */
1461 INT32 nBar, /* [I] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1462 BOOL32 fShow /* [I] TRUE = show, FALSE = hide */)
1463 {
1464 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1465 (nBar == SB_HORZ) ? 0 : fShow );
1466 return TRUE;
1467 }
1468
1469
1470 /*************************************************************************
1471 * EnableScrollBar16 (USER.482)
1472 */
1473 BOOL16 WINAPI EnableScrollBar16( HWND16 hwnd, INT16 nBar, UINT16 flags )
1474 {
1475 return EnableScrollBar32( hwnd, nBar, flags );
1476 }
1477
1478
1479 /*************************************************************************
1480 * EnableScrollBar32 (USER32.171)
1481 */
1482 BOOL32 WINAPI EnableScrollBar32( HWND32 hwnd, INT32 nBar, UINT32 flags )
1483 {
1484 BOOL32 bFineWithMe;
1485 SCROLLBAR_INFO *infoPtr;
1486
1487 TRACE(scroll, "%04x %d %d\n", hwnd, nBar, flags );
1488
1489 flags &= ESB_DISABLE_BOTH;
1490
1491 if (nBar == SB_BOTH)
1492 {
1493 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE;
1494 if (!(bFineWithMe = (infoPtr->flags == flags)) )
1495 {
1496 infoPtr->flags = flags;
1497 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1498 }
1499 nBar = SB_HORZ;
1500 }
1501 else
1502 bFineWithMe = TRUE;
1503
1504 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1505 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1506 infoPtr->flags = flags;
1507
1508 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1509 return TRUE;
1510 }
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