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Implement ReadFileEx and WriteFileEx (lpOverlappedCompletion routine
[wine.git] / controls / scroll.c
blob22bf3693038e1b85a37c75937b5f8185b68b1674
1 /*
2 * Scrollbar control
3 *
4 * Copyright 1993 Martin Ayotte
5 * Copyright 1994, 1996 Alexandre Julliard
6 */
7
8 #include "windef.h"
9 #include "wingdi.h"
10 #include "wine/winuser16.h"
11 #include "controls.h"
12 #include "win.h"
13 #include "debugtools.h"
14 #include "user.h"
15
16 DEFAULT_DEBUG_CHANNEL(scroll);
17
18 typedef struct
19 {
20 INT CurVal; /* Current scroll-bar value */
21 INT MinVal; /* Minimum scroll-bar value */
22 INT MaxVal; /* Maximum scroll-bar value */
23 INT Page; /* Page size of scroll bar (Win32) */
24 UINT flags; /* EnableScrollBar flags */
25 } SCROLLBAR_INFO;
26
27
28 static HBITMAP hUpArrow;
29 static HBITMAP hDnArrow;
30 static HBITMAP hLfArrow;
31 static HBITMAP hRgArrow;
32 static HBITMAP hUpArrowD;
33 static HBITMAP hDnArrowD;
34 static HBITMAP hLfArrowD;
35 static HBITMAP hRgArrowD;
36 static HBITMAP hUpArrowI;
37 static HBITMAP hDnArrowI;
38 static HBITMAP hLfArrowI;
39 static HBITMAP hRgArrowI;
40
41 #define TOP_ARROW(flags,pressed) \
42 (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
43 #define BOTTOM_ARROW(flags,pressed) \
44 (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
45 #define LEFT_ARROW(flags,pressed) \
46 (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
47 #define RIGHT_ARROW(flags,pressed) \
48 (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
49
50
51 /* Minimum size of the rectangle between the arrows */
52 #define SCROLL_MIN_RECT 4
53
54 /* Minimum size of the thumb in pixels */
55 #define SCROLL_MIN_THUMB 6
56
57 /* Overlap between arrows and thumb */
58 #define SCROLL_ARROW_THUMB_OVERLAP ((TWEAK_WineLook == WIN31_LOOK) ? 1 : 0)
59
60 /* Delay (in ms) before first repetition when holding the button down */
61 #define SCROLL_FIRST_DELAY 200
62
63 /* Delay (in ms) between scroll repetitions */
64 #define SCROLL_REPEAT_DELAY 50
65
66 /* Scroll timer id */
67 #define SCROLL_TIMER 0
68
69 /* Scroll-bar hit testing */
70 enum SCROLL_HITTEST
71 {
72 SCROLL_NOWHERE, /* Outside the scroll bar */
73 SCROLL_TOP_ARROW, /* Top or left arrow */
74 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
75 SCROLL_THUMB, /* Thumb rectangle */
76 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
77 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
78 };
79
80 /* What to do after SCROLL_SetScrollInfo() */
81 #define SA_SSI_HIDE 0x0001
82 #define SA_SSI_SHOW 0x0002
83 #define SA_SSI_REFRESH 0x0004
84 #define SA_SSI_REPAINT_ARROWS 0x0008
85
86 /* Thumb-tracking info */
87 static HWND SCROLL_TrackingWin = 0;
88 static INT SCROLL_TrackingBar = 0;
89 static INT SCROLL_TrackingPos = 0;
90 static INT SCROLL_TrackingVal = 0;
91 /* Hit test code of the last button-down event */
92 static enum SCROLL_HITTEST SCROLL_trackHitTest;
93 static BOOL SCROLL_trackVertical;
94
95 /* Is the moving thumb being displayed? */
96 static BOOL SCROLL_MovingThumb = FALSE;
97
98 /* Local functions */
99 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
100 BOOL fShowH, BOOL fShowV );
101 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
102 const SCROLLINFO *info, INT *action );
103 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
104 RECT *rect, INT arrowSize,
105 INT thumbSize, INT thumbPos,
106 UINT flags, BOOL vertical,
107 BOOL top_selected, BOOL bottom_selected );
108 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
109
110
111 /*********************************************************************
112 * scrollbar class descriptor
113 */
114 const struct builtin_class_descr SCROLL_builtin_class =
115 {
116 "ScrollBar", /* name */
117 CS_GLOBALCLASS | CS_DBLCLKS | CS_VREDRAW | CS_HREDRAW | CS_PARENTDC, /* style */
118 NULL, /* procA (winproc is Unicode only) */
119 ScrollBarWndProc, /* procW */
120 sizeof(SCROLLBAR_INFO), /* extra */
121 IDC_ARROWA, /* cursor */
122 0 /* brush */
123 };
124
125
126 /***********************************************************************
127 * SCROLL_LoadBitmaps
128 */
129 static void SCROLL_LoadBitmaps(void)
130 {
131 hUpArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
132 hDnArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
133 hLfArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
134 hRgArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
135 hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
136 hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
137 hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
138 hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
139 hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
140 hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
141 hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
142 hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
143 }
144
145
146 /***********************************************************************
147 * SCROLL_GetPtrScrollInfo
148 */
149 static SCROLLBAR_INFO *SCROLL_GetPtrScrollInfo( WND* wndPtr, INT nBar )
150 {
151 SCROLLBAR_INFO *infoPtr;
152
153 if (!wndPtr) return NULL;
154 switch(nBar)
155 {
156 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
157 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
158 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
159 default: return NULL;
160 }
161
162 if (!infoPtr) /* Create the info structure if needed */
163 {
164 if ((infoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(SCROLLBAR_INFO) )))
165 {
166 infoPtr->MinVal = infoPtr->CurVal = infoPtr->Page = 0;
167 infoPtr->MaxVal = 100;
168 infoPtr->flags = ESB_ENABLE_BOTH;
169 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
170 else wndPtr->pVScroll = infoPtr;
171 }
172 if (!hUpArrow) SCROLL_LoadBitmaps();
173 }
174 return infoPtr;
175 }
176
177
178 /***********************************************************************
179 * SCROLL_GetScrollInfo
180 */
181 static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND hwnd, INT nBar )
182 {
183 SCROLLBAR_INFO *retvalue;
184 WND *wndPtr = WIN_FindWndPtr( hwnd );
185 retvalue = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
186 WIN_ReleaseWndPtr(wndPtr);
187 return retvalue;
188 }
189
190
191 /***********************************************************************
192 * SCROLL_GetScrollBarRect
193 *
194 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
195 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
196 * 'arrowSize' returns the width or height of an arrow (depending on
197 * the orientation of the scrollbar), 'thumbSize' returns the size of
198 * the thumb, and 'thumbPos' returns the position of the thumb
199 * relative to the left or to the top.
200 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
201 */
202 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
203 INT *arrowSize, INT *thumbSize,
204 INT *thumbPos )
205 {
206 INT pixels;
207 BOOL vertical;
208 WND *wndPtr = WIN_FindWndPtr( hwnd );
209
210 switch(nBar)
211 {
212 case SB_HORZ:
213 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
214 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
215 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
216 lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
217 if(wndPtr->dwStyle & WS_BORDER) {
218 lprect->left--;
219 lprect->right++;
220 } else if(wndPtr->dwStyle & WS_VSCROLL)
221 lprect->right++;
222 vertical = FALSE;
223 break;
224
225 case SB_VERT:
226 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
227 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
228 lprect->right = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
229 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
230 if(wndPtr->dwStyle & WS_BORDER) {
231 lprect->top--;
232 lprect->bottom++;
233 } else if(wndPtr->dwStyle & WS_HSCROLL)
234 lprect->bottom++;
235 vertical = TRUE;
236 break;
237
238 case SB_CTL:
239 GetClientRect( hwnd, lprect );
240 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
241 break;
242
243 default:
244 WIN_ReleaseWndPtr(wndPtr);
245 return FALSE;
246 }
247
248 if (vertical) pixels = lprect->bottom - lprect->top;
249 else pixels = lprect->right - lprect->left;
250
251 if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
252 {
253 if (pixels > SCROLL_MIN_RECT)
254 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
255 else
256 *arrowSize = 0;
257 *thumbPos = *thumbSize = 0;
258 }
259 else
260 {
261 SCROLLBAR_INFO *info = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
262
263 *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
264 pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
265
266 if (info->Page)
267 {
268 *thumbSize = pixels * info->Page / (info->MaxVal-info->MinVal+1);
269 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
270 }
271 else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
272
273 if (((pixels -= *thumbSize ) < 0) ||
274 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
275 {
276 /* Rectangle too small or scrollbar disabled -> no thumb */
277 *thumbPos = *thumbSize = 0;
278 }
279 else
280 {
281 INT max = info->MaxVal - max( info->Page-1, 0 );
282 if (info->MinVal >= max)
283 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
284 else
285 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
286 + pixels * (info->CurVal-info->MinVal) / (max - info->MinVal);
287 }
288 }
289 WIN_ReleaseWndPtr(wndPtr);
290 return vertical;
291 }
292
293
294 /***********************************************************************
295 * SCROLL_GetThumbVal
296 *
297 * Compute the current scroll position based on the thumb position in pixels
298 * from the top of the scroll-bar.
299 */
300 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
301 BOOL vertical, INT pos )
302 {
303 INT thumbSize;
304 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
305
306 if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
307 return infoPtr->MinVal;
308
309 if (infoPtr->Page)
310 {
311 thumbSize = pixels * infoPtr->Page/(infoPtr->MaxVal-infoPtr->MinVal+1);
312 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
313 }
314 else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
315
316 if ((pixels -= thumbSize) <= 0) return infoPtr->MinVal;
317
318 pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
319 if (pos > pixels) pos = pixels;
320
321 if (!infoPtr->Page) pos *= infoPtr->MaxVal - infoPtr->MinVal;
322 else pos *= infoPtr->MaxVal - infoPtr->MinVal - infoPtr->Page + 1;
323 return infoPtr->MinVal + ((pos + pixels / 2) / pixels);
324 }
325
326 /***********************************************************************
327 * SCROLL_PtInRectEx
328 */
329 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
330 {
331 RECT rect = *lpRect;
332
333 if (vertical)
334 {
335 rect.left -= lpRect->right - lpRect->left;
336 rect.right += lpRect->right - lpRect->left;
337 }
338 else
339 {
340 rect.top -= lpRect->bottom - lpRect->top;
341 rect.bottom += lpRect->bottom - lpRect->top;
342 }
343 return PtInRect( &rect, pt );
344 }
345
346 /***********************************************************************
347 * SCROLL_ClipPos
348 */
349 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
350 {
351 if( pt.x < lpRect->left )
352 pt.x = lpRect->left;
353 else
354 if( pt.x > lpRect->right )
355 pt.x = lpRect->right;
356
357 if( pt.y < lpRect->top )
358 pt.y = lpRect->top;
359 else
360 if( pt.y > lpRect->bottom )
361 pt.y = lpRect->bottom;
362
363 return pt;
364 }
365
366
367 /***********************************************************************
368 * SCROLL_HitTest
369 *
370 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
371 */
372 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
373 POINT pt, BOOL bDragging )
374 {
375 INT arrowSize, thumbSize, thumbPos;
376 RECT rect;
377
378 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
379 &arrowSize, &thumbSize, &thumbPos );
380
381 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
382 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
383
384 if (vertical)
385 {
386 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
387 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
388 if (!thumbPos) return SCROLL_TOP_RECT;
389 pt.y -= rect.top;
390 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
391 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
392 }
393 else /* horizontal */
394 {
395 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
396 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
397 if (!thumbPos) return SCROLL_TOP_RECT;
398 pt.x -= rect.left;
399 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
400 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
401 }
402 return SCROLL_THUMB;
403 }
404
405
406 /***********************************************************************
407 * SCROLL_DrawArrows
408 *
409 * Draw the scroll bar arrows.
410 */
411 static void SCROLL_DrawArrows_9x( HDC hdc, SCROLLBAR_INFO *infoPtr,
412 RECT *rect, INT arrowSize, BOOL vertical,
413 BOOL top_pressed, BOOL bottom_pressed )
414 {
415 RECT r;
416
417 r = *rect;
418 if( vertical )
419 r.bottom = r.top + arrowSize;
420 else
421 r.right = r.left + arrowSize;
422
423 DrawFrameControl( hdc, &r, DFC_SCROLL,
424 (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
425 | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
426 | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
427
428 r = *rect;
429 if( vertical )
430 r.top = r.bottom-arrowSize;
431 else
432 r.left = r.right-arrowSize;
433
434 DrawFrameControl( hdc, &r, DFC_SCROLL,
435 (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
436 | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
437 | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
438 }
439
440 static void SCROLL_DrawArrows_31( HDC hdc, SCROLLBAR_INFO *infoPtr,
441 RECT *rect, INT arrowSize, BOOL vertical,
442 BOOL top_pressed, BOOL bottom_pressed )
443 {
444 HDC hdcMem = CreateCompatibleDC( hdc );
445 HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
446 TOP_ARROW(infoPtr->flags, top_pressed)
447 : LEFT_ARROW(infoPtr->flags, top_pressed));
448
449 SetStretchBltMode( hdc, STRETCH_DELETESCANS );
450 StretchBlt( hdc, rect->left, rect->top,
451 vertical ? rect->right-rect->left : arrowSize,
452 vertical ? arrowSize : rect->bottom-rect->top,
453 hdcMem, 0, 0,
454 GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
455 SRCCOPY );
456
457 SelectObject( hdcMem, vertical ?
458 BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
459 : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
460 if (vertical)
461 StretchBlt( hdc, rect->left, rect->bottom - arrowSize,
462 rect->right - rect->left, arrowSize,
463 hdcMem, 0, 0,
464 GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
465 SRCCOPY );
466 else
467 StretchBlt( hdc, rect->right - arrowSize, rect->top,
468 arrowSize, rect->bottom - rect->top,
469 hdcMem, 0, 0,
470 GetSystemMetrics(SM_CXVSCROLL), GetSystemMetrics(SM_CYHSCROLL),
471 SRCCOPY );
472 SelectObject( hdcMem, hbmpPrev );
473 DeleteDC( hdcMem );
474 }
475
476 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
477 RECT *rect, INT arrowSize, BOOL vertical,
478 BOOL top_pressed, BOOL bottom_pressed )
479 {
480 if( TWEAK_WineLook == WIN31_LOOK )
481 SCROLL_DrawArrows_31( hdc, infoPtr, rect, arrowSize,
482 vertical, top_pressed,bottom_pressed );
483 else
484 SCROLL_DrawArrows_9x( hdc, infoPtr, rect, arrowSize,
485 vertical, top_pressed,bottom_pressed );
486 }
487
488
489 /***********************************************************************
490 * SCROLL_DrawMovingThumb
491 *
492 * Draw the moving thumb rectangle.
493 */
494 static void SCROLL_DrawMovingThumb_31( HDC hdc, RECT *rect, BOOL vertical,
495 INT arrowSize, INT thumbSize )
496 {
497 RECT r = *rect;
498 if (vertical)
499 {
500 r.top += SCROLL_TrackingPos;
501 if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
502 r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
503 if (r.top + thumbSize >
504 rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
505 r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
506 - thumbSize;
507 r.bottom = r.top + thumbSize;
508 }
509 else
510 {
511 r.left += SCROLL_TrackingPos;
512 if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
513 r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
514 if (r.left + thumbSize >
515 rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
516 r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
517 - thumbSize;
518 r.right = r.left + thumbSize;
519 }
520
521 DrawFocusRect( hdc, &r );
522 SCROLL_MovingThumb = !SCROLL_MovingThumb;
523 }
524
525 static void SCROLL_DrawMovingThumb_9x( HDC hdc, RECT *rect, BOOL vertical,
526 INT arrowSize, INT thumbSize )
527 {
528 INT pos = SCROLL_TrackingPos;
529 INT max_size;
530
531 if( vertical )
532 max_size = rect->bottom - rect->top;
533 else
534 max_size = rect->right - rect->left;
535
536 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
537
538 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
539 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
540 else if( pos > max_size )
541 pos = max_size;
542
543 SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
544 rect, arrowSize, thumbSize, pos,
545 0, vertical, FALSE, FALSE );
546
547 SCROLL_MovingThumb = !SCROLL_MovingThumb;
548 }
549
550 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
551 INT arrowSize, INT thumbSize )
552 {
553 if( TWEAK_WineLook == WIN31_LOOK )
554 SCROLL_DrawMovingThumb_31( hdc, rect, vertical, arrowSize, thumbSize );
555 else
556 SCROLL_DrawMovingThumb_9x( hdc, rect, vertical, arrowSize, thumbSize );
557 }
558
559 /***********************************************************************
560 * SCROLL_DrawInterior
561 *
562 * Draw the scroll bar interior (everything except the arrows).
563 */
564 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
565 RECT *rect, INT arrowSize,
566 INT thumbSize, INT thumbPos,
567 UINT flags, BOOL vertical,
568 BOOL top_selected, BOOL bottom_selected )
569 {
570 RECT r;
571 HPEN hSavePen;
572 HBRUSH hSaveBrush,hBrush;
573
574 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
575 * The window-owned scrollbars need to call DEFWND_ControlColor
576 * to correctly setup default scrollbar colors
577 */
578 if (nBar == SB_CTL)
579 {
580 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
581 (WPARAM)hdc,(LPARAM)hwnd);
582 }
583 else
584 {
585 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
586 }
587
588 hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
589 hSaveBrush = SelectObject( hdc, hBrush );
590
591 /* Calculate the scroll rectangle */
592 r = *rect;
593 if (vertical)
594 {
595 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
596 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
597 }
598 else
599 {
600 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
601 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
602 }
603
604 /* Draw the scroll rectangles and thumb */
605 if (!thumbPos) /* No thumb to draw */
606 {
607 PatBlt( hdc, r.left, r.top,
608 r.right - r.left, r.bottom - r.top,
609 PATCOPY );
610
611 /* cleanup and return */
612 SelectObject( hdc, hSavePen );
613 SelectObject( hdc, hSaveBrush );
614 return;
615 }
616
617 if (vertical)
618 {
619 PatBlt( hdc, r.left, r.top,
620 r.right - r.left,
621 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
622 top_selected ? 0x0f0000 : PATCOPY );
623 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
624 PatBlt( hdc, r.left, r.top + thumbSize,
625 r.right - r.left,
626 r.bottom - r.top - thumbSize,
627 bottom_selected ? 0x0f0000 : PATCOPY );
628 r.bottom = r.top + thumbSize;
629 }
630 else /* horizontal */
631 {
632 PatBlt( hdc, r.left, r.top,
633 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
634 r.bottom - r.top,
635 top_selected ? 0x0f0000 : PATCOPY );
636 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
637 PatBlt( hdc, r.left + thumbSize, r.top,
638 r.right - r.left - thumbSize,
639 r.bottom - r.top,
640 bottom_selected ? 0x0f0000 : PATCOPY );
641 r.right = r.left + thumbSize;
642 }
643
644 /* Draw the thumb */
645 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
646
647 /* cleanup */
648 SelectObject( hdc, hSavePen );
649 SelectObject( hdc, hSaveBrush );
650 }
651
652
653 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
654 RECT *rect, INT arrowSize,
655 INT thumbSize, INT thumbPos,
656 UINT flags, BOOL vertical,
657 BOOL top_selected, BOOL bottom_selected )
658 {
659 RECT r;
660 HPEN hSavePen;
661 HBRUSH hSaveBrush,hBrush;
662 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
663
664 if (Save_SCROLL_MovingThumb &&
665 (SCROLL_TrackingWin == hwnd) &&
666 (SCROLL_TrackingBar == nBar))
667 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
668
669 /* Select the correct brush and pen */
670
671 if (TWEAK_WineLook == WIN31_LOOK && (flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
672 {
673 /* This ought to be the color of the parent window */
674 hBrush = GetSysColorBrush(COLOR_WINDOW);
675 }
676 else
677 {
678 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
679 * The window-owned scrollbars need to call DEFWND_ControlColor
680 * to correctly setup default scrollbar colors
681 */
682 if (nBar == SB_CTL) {
683 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
684 (WPARAM)hdc,(LPARAM)hwnd);
685 } else {
686 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
687 }
688 }
689 hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
690 hSaveBrush = SelectObject( hdc, hBrush );
691
692 /* Calculate the scroll rectangle */
693
694 r = *rect;
695 if (vertical)
696 {
697 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
698 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
699 }
700 else
701 {
702 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
703 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
704 }
705
706 /* Draw the scroll bar frame */
707
708 /* Only draw outline if Win 3.1. Mar 24, 1999 - Ronald B. Cemer */
709 if (TWEAK_WineLook == WIN31_LOOK)
710 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
711
712 /* Draw the scroll rectangles and thumb */
713
714 if (!thumbPos) /* No thumb to draw */
715 {
716 INT offset = (TWEAK_WineLook > WIN31_LOOK) ? 0 : 1;
717
718 PatBlt( hdc, r.left+offset, r.top+offset,
719 r.right - r.left - 2*offset, r.bottom - r.top - 2*offset,
720 PATCOPY );
721
722 /* cleanup and return */
723 SelectObject( hdc, hSavePen );
724 SelectObject( hdc, hSaveBrush );
725 return;
726 }
727
728 if (vertical)
729 {
730 INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
731
732 PatBlt( hdc, r.left + offset, r.top + offset,
733 r.right - r.left - offset*2,
734 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - offset,
735 top_selected ? 0x0f0000 : PATCOPY );
736 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
737 PatBlt( hdc, r.left + offset, r.top + thumbSize,
738 r.right - r.left - offset*2,
739 r.bottom - r.top - thumbSize - offset,
740 bottom_selected ? 0x0f0000 : PATCOPY );
741 r.bottom = r.top + thumbSize;
742 }
743 else /* horizontal */
744 {
745 INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
746
747 PatBlt( hdc, r.left + offset, r.top + offset,
748 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
749 r.bottom - r.top - offset*2,
750 top_selected ? 0x0f0000 : PATCOPY );
751 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
752 PatBlt( hdc, r.left + thumbSize, r.top + offset,
753 r.right - r.left - thumbSize - offset,
754 r.bottom - r.top - offset*2,
755 bottom_selected ? 0x0f0000 : PATCOPY );
756 r.right = r.left + thumbSize;
757 }
758
759 /* Draw the thumb */
760
761 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
762 if (TWEAK_WineLook == WIN31_LOOK)
763 {
764 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
765 r.top++, r.left++;
766 }
767 else
768 {
769 Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
770 }
771 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
772
773 if (Save_SCROLL_MovingThumb &&
774 (SCROLL_TrackingWin == hwnd) &&
775 (SCROLL_TrackingBar == nBar))
776 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
777
778 /* cleanup */
779 SelectObject( hdc, hSavePen );
780 SelectObject( hdc, hSaveBrush );
781 }
782
783
784 /***********************************************************************
785 * SCROLL_DrawScrollBar
786 *
787 * Redraw the whole scrollbar.
788 */
789 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
790 BOOL arrows, BOOL interior )
791 {
792 INT arrowSize, thumbSize, thumbPos;
793 RECT rect;
794 BOOL vertical;
795 WND *wndPtr = WIN_FindWndPtr( hwnd );
796 SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
797 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
798
799 if (!wndPtr || !infoPtr ||
800 ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
801 ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
802 if (!WIN_IsWindowDrawable( wndPtr, FALSE )) goto END;
803
804 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
805 &arrowSize, &thumbSize, &thumbPos );
806
807 /* do not draw if the scrollbar rectangle is empty */
808 if(IsRectEmpty(&rect))
809 goto END;
810
811 if (Save_SCROLL_MovingThumb &&
812 (SCROLL_TrackingWin == hwnd) &&
813 (SCROLL_TrackingBar == nBar))
814 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
815
816 /* Draw the arrows */
817
818 if (arrows && arrowSize)
819 {
820 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
821 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
822 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
823 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
824 else
825 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
826 FALSE, FALSE );
827 }
828 if( interior )
829 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
830 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
831
832 if (Save_SCROLL_MovingThumb &&
833 (SCROLL_TrackingWin == hwnd) &&
834 (SCROLL_TrackingBar == nBar))
835 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
836
837 /* if scroll bar has focus, reposition the caret */
838 if(hwnd==GetFocus() && (nBar==SB_CTL))
839 {
840 if (!vertical)
841 {
842 SetCaretPos(thumbPos+1, rect.top+1);
843 }
844 else
845 {
846 SetCaretPos(rect.top+1, thumbPos+1);
847 }
848 }
849
850 END:
851 WIN_ReleaseWndPtr(wndPtr);
852 }
853
854
855 /***********************************************************************
856 * SCROLL_RefreshScrollBar
857 *
858 * Repaint the scroll bar interior after a SetScrollRange() or
859 * SetScrollPos() call.
860 */
861 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
862 BOOL arrows, BOOL interior )
863 {
864 HDC hdc = GetDCEx( hwnd, 0,
865 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
866 if (!hdc) return;
867
868 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
869 ReleaseDC( hwnd, hdc );
870 }
871
872
873 /***********************************************************************
874 * SCROLL_HandleKbdEvent
875 *
876 * Handle a keyboard event (only for SB_CTL scrollbars).
877 */
878 static void SCROLL_HandleKbdEvent( HWND hwnd, WPARAM wParam )
879 {
880 WND *wndPtr = WIN_FindWndPtr( hwnd );
881 WPARAM msg;
882
883 switch(wParam)
884 {
885 case VK_PRIOR: msg = SB_PAGEUP; break;
886 case VK_NEXT: msg = SB_PAGEDOWN; break;
887 case VK_HOME: msg = SB_TOP; break;
888 case VK_END: msg = SB_BOTTOM; break;
889 case VK_UP: msg = SB_LINEUP; break;
890 case VK_DOWN: msg = SB_LINEDOWN; break;
891 default:
892 WIN_ReleaseWndPtr(wndPtr);
893 return;
894 }
895 SendMessageW( GetParent(hwnd),
896 (wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
897 msg, hwnd );
898 WIN_ReleaseWndPtr(wndPtr);
899 }
900
901
902 /***********************************************************************
903 * SCROLL_HandleScrollEvent
904 *
905 * Handle a mouse or timer event for the scrollbar.
906 * 'pt' is the location of the mouse event in client (for SB_CTL) or
907 * windows coordinates.
908 */
909 void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
910 {
911 /* Previous mouse position for timer events */
912 static POINT prevPt;
913 /* Thumb position when tracking started. */
914 static UINT trackThumbPos;
915 /* Position in the scroll-bar of the last button-down event. */
916 static INT lastClickPos;
917 /* Position in the scroll-bar of the last mouse event. */
918 static INT lastMousePos;
919
920 enum SCROLL_HITTEST hittest;
921 HWND hwndOwner, hwndCtl;
922 BOOL vertical;
923 INT arrowSize, thumbSize, thumbPos;
924 RECT rect;
925 HDC hdc;
926
927 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
928 if (!infoPtr) return;
929 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
930 return;
931
932 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
933 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
934 &arrowSize, &thumbSize, &thumbPos );
935 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
936 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
937
938 switch(msg)
939 {
940 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
941 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
942 SCROLL_trackVertical = vertical;
943 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
944 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
945 lastMousePos = lastClickPos;
946 trackThumbPos = thumbPos;
947 prevPt = pt;
948 SetCapture( hwnd );
949 if (nBar == SB_CTL && (GetWindowLongA(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
950 break;
951
952 case WM_MOUSEMOVE:
953 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
954 prevPt = pt;
955 break;
956
957 case WM_LBUTTONUP:
958 hittest = SCROLL_NOWHERE;
959 ReleaseCapture();
960 /* if scrollbar has focus, show back caret */
961 if (hwnd==GetFocus()) ShowCaret(hwnd);
962 break;
963
964 case WM_SYSTIMER:
965 pt = prevPt;
966 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
967 break;
968
969 default:
970 return; /* Should never happen */
971 }
972
973 TRACE("Event: hwnd=%04x bar=%d msg=%x pt=%ld,%ld hit=%d\n",
974 hwnd, nBar, msg, pt.x, pt.y, hittest );
975
976 switch(SCROLL_trackHitTest)
977 {
978 case SCROLL_NOWHERE: /* No tracking in progress */
979 break;
980
981 case SCROLL_TOP_ARROW:
982 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
983 (hittest == SCROLL_trackHitTest), FALSE );
984 if (hittest == SCROLL_trackHitTest)
985 {
986 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
987 {
988 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
989 SB_LINEUP, hwndCtl );
990 }
991
992 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
993 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
994 (TIMERPROC)0 );
995 }
996 else KillSystemTimer( hwnd, SCROLL_TIMER );
997 break;
998
999 case SCROLL_TOP_RECT:
1000 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1001 thumbPos, infoPtr->flags, vertical,
1002 (hittest == SCROLL_trackHitTest), FALSE );
1003 if (hittest == SCROLL_trackHitTest)
1004 {
1005 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1006 {
1007 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1008 SB_PAGEUP, hwndCtl );
1009 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1010 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1011 (TIMERPROC)0 );
1012 }
1013 }
1014 else KillSystemTimer( hwnd, SCROLL_TIMER );
1015 break;
1016
1017 case SCROLL_THUMB:
1018 if (msg == WM_LBUTTONDOWN)
1019 {
1020 SCROLL_TrackingWin = hwnd;
1021 SCROLL_TrackingBar = nBar;
1022 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
1023 if (!SCROLL_MovingThumb)
1024 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1025 }
1026 else if (msg == WM_LBUTTONUP)
1027 {
1028 if (SCROLL_MovingThumb)
1029 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1030 SCROLL_TrackingWin = 0;
1031 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1032 thumbPos, infoPtr->flags, vertical,
1033 FALSE, FALSE );
1034 }
1035 else /* WM_MOUSEMOVE */
1036 {
1037 UINT pos;
1038
1039 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
1040 else
1041 {
1042 pt = SCROLL_ClipPos( &rect, pt );
1043 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
1044 }
1045 if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
1046 {
1047 if (SCROLL_MovingThumb)
1048 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1049 arrowSize, thumbSize );
1050 lastMousePos = pos;
1051 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
1052 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1053 vertical,
1054 SCROLL_TrackingPos );
1055 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1056 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1057 hwndCtl );
1058 if (!SCROLL_MovingThumb)
1059 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1060 arrowSize, thumbSize );
1061 }
1062 }
1063 break;
1064
1065 case SCROLL_BOTTOM_RECT:
1066 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1067 thumbPos, infoPtr->flags, vertical,
1068 FALSE, (hittest == SCROLL_trackHitTest) );
1069 if (hittest == SCROLL_trackHitTest)
1070 {
1071 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1072 {
1073 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1074 SB_PAGEDOWN, hwndCtl );
1075 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1076 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1077 (TIMERPROC)0 );
1078 }
1079 }
1080 else KillSystemTimer( hwnd, SCROLL_TIMER );
1081 break;
1082
1083 case SCROLL_BOTTOM_ARROW:
1084 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1085 FALSE, (hittest == SCROLL_trackHitTest) );
1086 if (hittest == SCROLL_trackHitTest)
1087 {
1088 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1089 {
1090 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1091 SB_LINEDOWN, hwndCtl );
1092 }
1093
1094 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1095 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1096 (TIMERPROC)0 );
1097 }
1098 else KillSystemTimer( hwnd, SCROLL_TIMER );
1099 break;
1100 }
1101
1102 if (msg == WM_LBUTTONUP)
1103 {
1104 hittest = SCROLL_trackHitTest;
1105 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1106
1107 if (hittest == SCROLL_THUMB)
1108 {
1109 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1110 trackThumbPos + lastMousePos - lastClickPos );
1111 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1112 MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl );
1113 }
1114 else
1115 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1116 SB_ENDSCROLL, hwndCtl );
1117 }
1118
1119 ReleaseDC( hwnd, hdc );
1120 }
1121
1122
1123 /***********************************************************************
1124 * ScrollBarWndProc
1125 */
1126 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1127 {
1128 switch(message)
1129 {
1130 case WM_CREATE:
1131 {
1132 CREATESTRUCTW *lpCreat = (CREATESTRUCTW *)lParam;
1133 if (lpCreat->style & SBS_SIZEBOX)
1134 {
1135 FIXME("Unimplemented style SBS_SIZEBOX.\n" );
1136 return 0;
1137 }
1138 if (lpCreat->style & SBS_VERT)
1139 {
1140 if (lpCreat->style & SBS_LEFTALIGN)
1141 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1142 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1143 else if (lpCreat->style & SBS_RIGHTALIGN)
1144 MoveWindow( hwnd,
1145 lpCreat->x+lpCreat->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1146 lpCreat->y,
1147 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1148 }
1149 else /* SBS_HORZ */
1150 {
1151 if (lpCreat->style & SBS_TOPALIGN)
1152 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1153 lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1154 else if (lpCreat->style & SBS_BOTTOMALIGN)
1155 MoveWindow( hwnd,
1156 lpCreat->x,
1157 lpCreat->y+lpCreat->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1158 lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1159 }
1160 }
1161 if (!hUpArrow) SCROLL_LoadBitmaps();
1162 TRACE("ScrollBar creation, hwnd=%04x\n", hwnd );
1163 return 0;
1164
1165 case WM_LBUTTONDOWN:
1166 case WM_LBUTTONUP:
1167 case WM_MOUSEMOVE:
1168 case WM_SYSTIMER:
1169 {
1170 POINT pt;
1171 pt.x = SLOWORD(lParam);
1172 pt.y = SHIWORD(lParam);
1173 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1174 }
1175 break;
1176
1177 /* if key event is received, the scrollbar has the focus */
1178 case WM_KEYDOWN:
1179 /* hide caret on first KEYDOWN to prevent flicker */
1180 if ((lParam & 0x40000000)==0)
1181 HideCaret(hwnd);
1182 SCROLL_HandleKbdEvent( hwnd, wParam );
1183 break;
1184
1185 case WM_KEYUP:
1186 ShowCaret(hwnd);
1187 break;
1188
1189 case WM_SETFOCUS:
1190 {
1191 /* Create a caret when a ScrollBar get focus */
1192 RECT rect;
1193 int arrowSize, thumbSize, thumbPos, vertical;
1194 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1195 &arrowSize, &thumbSize, &thumbPos );
1196 if (!vertical)
1197 {
1198 CreateCaret(hwnd,1, thumbSize-2, rect.bottom-rect.top-2);
1199 SetCaretPos(thumbPos+1, rect.top+1);
1200 }
1201 else
1202 {
1203 CreateCaret(hwnd,1, rect.right-rect.left-2,thumbSize-2);
1204 SetCaretPos(rect.top+1, thumbPos+1);
1205 }
1206 ShowCaret(hwnd);
1207 }
1208 break;
1209
1210 case WM_KILLFOCUS:
1211 {
1212 RECT rect;
1213 int arrowSize, thumbSize, thumbPos, vertical;
1214 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1215 if (!vertical){
1216 rect.left=thumbPos+1;
1217 rect.right=rect.left+thumbSize;
1218 }
1219 else
1220 {
1221 rect.top=thumbPos+1;
1222 rect.bottom=rect.top+thumbSize;
1223 }
1224 HideCaret(hwnd);
1225 InvalidateRect(hwnd,&rect,0);
1226 DestroyCaret();
1227 }
1228 break;
1229
1230 case WM_ERASEBKGND:
1231 return 1;
1232
1233 case WM_GETDLGCODE:
1234 return DLGC_WANTARROWS; /* Windows returns this value */
1235
1236 case WM_PAINT:
1237 {
1238 PAINTSTRUCT ps;
1239 HDC hdc = BeginPaint( hwnd, &ps );
1240 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1241 EndPaint( hwnd, &ps );
1242 }
1243 break;
1244
1245 case SBM_SETPOS16:
1246 case SBM_SETPOS:
1247 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1248
1249 case SBM_GETPOS16:
1250 case SBM_GETPOS:
1251 return GetScrollPos( hwnd, SB_CTL );
1252
1253 case SBM_SETRANGE16:
1254 SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
1255 wParam /* FIXME: Is this correct? */ );
1256 return 0;
1257
1258 case SBM_SETRANGE:
1259 {
1260 INT oldPos = GetScrollPos( hwnd, SB_CTL );
1261 SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
1262 if (oldPos != GetScrollPos( hwnd, SB_CTL )) return oldPos;
1263 }
1264 return 0;
1265
1266 case SBM_GETRANGE16:
1267 FIXME("don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
1268 return 0;
1269
1270 case SBM_GETRANGE:
1271 GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
1272 return 0;
1273
1274 case SBM_ENABLE_ARROWS16:
1275 case SBM_ENABLE_ARROWS:
1276 return EnableScrollBar( hwnd, SB_CTL, wParam );
1277
1278 case SBM_SETRANGEREDRAW:
1279 {
1280 INT oldPos = GetScrollPos( hwnd, SB_CTL );
1281 SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
1282 if (oldPos != GetScrollPos( hwnd, SB_CTL )) return oldPos;
1283 }
1284 return 0;
1285
1286 case SBM_SETSCROLLINFO:
1287 return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1288
1289 case SBM_GETSCROLLINFO:
1290 return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
1291
1292 case 0x00e5:
1293 case 0x00e7:
1294 case 0x00e8:
1295 case 0x00eb:
1296 case 0x00ec:
1297 case 0x00ed:
1298 case 0x00ee:
1299 case 0x00ef:
1300 ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1301 message, wParam, lParam );
1302 break;
1303
1304 default:
1305 if (message >= WM_USER)
1306 WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1307 message, wParam, lParam );
1308 return DefWindowProcW( hwnd, message, wParam, lParam );
1309 }
1310 return 0;
1311 }
1312
1313
1314 /*************************************************************************
1315 * SetScrollInfo (USER.475)
1316 */
1317 INT16 WINAPI SetScrollInfo16( HWND16 hwnd, INT16 nBar, const SCROLLINFO *info,
1318 BOOL16 bRedraw )
1319 {
1320 return (INT16)SetScrollInfo( hwnd, nBar, info, bRedraw );
1321 }
1322
1323
1324 /*************************************************************************
1325 * SetScrollInfo (USER32.@)
1326 * SetScrollInfo can be used to set the position, upper bound,
1327 * lower bound, and page size of a scrollbar control.
1328 *
1329 * RETURNS
1330 * Scrollbar position
1331 *
1332 * NOTE
1333 * For 100 lines of text to be displayed in a window of 25 lines,
1334 * one would for instance use info->nMin=0, info->nMax=75
1335 * (corresponding to the 76 different positions of the window on
1336 * the text), and info->nPage=25.
1337 */
1338 INT WINAPI SetScrollInfo(
1339 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1340 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1341 const SCROLLINFO *info /* [in] Specifies what to change and new values */,
1342 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1343 {
1344 INT action;
1345 INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1346
1347 if( action & SA_SSI_HIDE )
1348 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1349 else
1350 {
1351 if( action & SA_SSI_SHOW )
1352 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1353 return retVal; /* SetWindowPos() already did the painting */
1354
1355 if( bRedraw && (action & SA_SSI_REFRESH))
1356 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1357 else if( action & SA_SSI_REPAINT_ARROWS )
1358 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1359 }
1360 return retVal;
1361 }
1362
1363 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1364 const SCROLLINFO *info, INT *action )
1365 {
1366 /* Update the scrollbar state and set action flags according to
1367 * what has to be done graphics wise. */
1368
1369 SCROLLBAR_INFO *infoPtr;
1370 UINT new_flags;
1371 BOOL bChangeParams = FALSE; /* don't show/hide scrollbar if params don't change */
1372
1373 *action = 0;
1374
1375 if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
1376 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1377 if ((info->cbSize != sizeof(*info)) &&
1378 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1379
1380 if (TRACE_ON(scroll))
1381 {
1382 TRACE("hwnd=%04x bar=%d", hwnd, nBar);
1383 if (info->fMask & SIF_PAGE) DPRINTF( " page=%d", info->nPage );
1384 if (info->fMask & SIF_POS) DPRINTF( " pos=%d", info->nPos );
1385 if (info->fMask & SIF_RANGE) DPRINTF( " min=%d max=%d", info->nMin, info->nMax );
1386 DPRINTF("\n");
1387 }
1388
1389 /* Set the page size */
1390
1391 if (info->fMask & SIF_PAGE)
1392 {
1393 if( infoPtr->Page != info->nPage )
1394 {
1395 infoPtr->Page = info->nPage;
1396 *action |= SA_SSI_REFRESH;
1397 bChangeParams = TRUE;
1398 }
1399 }
1400
1401 /* Set the scroll pos */
1402
1403 if (info->fMask & SIF_POS)
1404 {
1405 if( infoPtr->CurVal != info->nPos )
1406 {
1407 infoPtr->CurVal = info->nPos;
1408 *action |= SA_SSI_REFRESH;
1409 }
1410 }
1411
1412 /* Set the scroll range */
1413
1414 if (info->fMask & SIF_RANGE)
1415 {
1416 /* Invalid range -> range is set to (0,0) */
1417 if ((info->nMin > info->nMax) ||
1418 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1419 {
1420 infoPtr->MinVal = 0;
1421 infoPtr->MaxVal = 0;
1422 bChangeParams = TRUE;
1423 }
1424 else
1425 {
1426 if( infoPtr->MinVal != info->nMin ||
1427 infoPtr->MaxVal != info->nMax )
1428 {
1429 *action |= SA_SSI_REFRESH;
1430 infoPtr->MinVal = info->nMin;
1431 infoPtr->MaxVal = info->nMax;
1432 bChangeParams = TRUE;
1433 }
1434 }
1435 }
1436
1437 /* Make sure the page size is valid */
1438
1439 if (infoPtr->Page < 0) infoPtr->Page = 0;
1440 else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 )
1441 infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1;
1442
1443 /* Make sure the pos is inside the range */
1444
1445 if (infoPtr->CurVal < infoPtr->MinVal)
1446 infoPtr->CurVal = infoPtr->MinVal;
1447 else if (infoPtr->CurVal > infoPtr->MaxVal - max( infoPtr->Page-1, 0 ))
1448 infoPtr->CurVal = infoPtr->MaxVal - max( infoPtr->Page-1, 0 );
1449
1450 TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1451 infoPtr->Page, infoPtr->CurVal,
1452 infoPtr->MinVal, infoPtr->MaxVal );
1453
1454 /* don't change the scrollbar state if SetScrollInfo
1455 * is just called with SIF_DISABLENOSCROLL
1456 */
1457 if(!(info->fMask & SIF_ALL)) goto done;
1458
1459 /* Check if the scrollbar should be hidden or disabled */
1460
1461 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1462 {
1463 new_flags = infoPtr->flags;
1464 if (infoPtr->MinVal >= infoPtr->MaxVal - max( infoPtr->Page-1, 0 ))
1465 {
1466 /* Hide or disable scroll-bar */
1467 if (info->fMask & SIF_DISABLENOSCROLL)
1468 {
1469 new_flags = ESB_DISABLE_BOTH;
1470 *action |= SA_SSI_REFRESH;
1471 }
1472 else if ((nBar != SB_CTL) && bChangeParams)
1473 {
1474 *action = SA_SSI_HIDE;
1475 goto done;
1476 }
1477 }
1478 else /* Show and enable scroll-bar */
1479 {
1480 new_flags = 0;
1481 if ((nBar != SB_CTL) && bChangeParams)
1482 *action |= SA_SSI_SHOW;
1483 }
1484
1485 if (infoPtr->flags != new_flags) /* check arrow flags */
1486 {
1487 infoPtr->flags = new_flags;
1488 *action |= SA_SSI_REPAINT_ARROWS;
1489 }
1490 }
1491
1492 done:
1493 /* Return current position */
1494
1495 return infoPtr->CurVal;
1496 }
1497
1498
1499 /*************************************************************************
1500 * GetScrollInfo (USER.476)
1501 */
1502 BOOL16 WINAPI GetScrollInfo16( HWND16 hwnd, INT16 nBar, LPSCROLLINFO info )
1503 {
1504 return GetScrollInfo( hwnd, nBar, info );
1505 }
1506
1507
1508 /*************************************************************************
1509 * GetScrollInfo (USER32.@)
1510 * GetScrollInfo can be used to retrieve the position, upper bound,
1511 * lower bound, and page size of a scrollbar control.
1512 *
1513 * RETURNS STD
1514 */
1515 BOOL WINAPI GetScrollInfo(
1516 HWND hwnd /* [in] Handle of window */ ,
1517 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1518 LPSCROLLINFO info /* [in/out] (info.fMask [in] specifies which values are to retrieve) */)
1519 {
1520 SCROLLBAR_INFO *infoPtr;
1521
1522 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1523 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1524 if ((info->cbSize != sizeof(*info)) &&
1525 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1526
1527 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page;
1528 if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal;
1529 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1530 info->nTrackPos = (SCROLL_TrackingWin==hwnd) ? SCROLL_TrackingVal : infoPtr->CurVal;
1531 if (info->fMask & SIF_RANGE)
1532 {
1533 info->nMin = infoPtr->MinVal;
1534 info->nMax = infoPtr->MaxVal;
1535 }
1536 return (info->fMask & SIF_ALL) != 0;
1537 }
1538
1539
1540 /*************************************************************************
1541 * SetScrollPos (USER.62)
1542 */
1543 INT16 WINAPI SetScrollPos16( HWND16 hwnd, INT16 nBar, INT16 nPos,
1544 BOOL16 bRedraw )
1545 {
1546 return (INT16)SetScrollPos( hwnd, nBar, nPos, bRedraw );
1547 }
1548
1549
1550 /*************************************************************************
1551 * SetScrollPos (USER32.@)
1552 *
1553 * RETURNS
1554 * Success: Scrollbar position
1555 * Failure: 0
1556 *
1557 * REMARKS
1558 * Note the ambiguity when 0 is returned. Use GetLastError
1559 * to make sure there was an error (and to know which one).
1560 */
1561 INT WINAPI SetScrollPos(
1562 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1563 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1564 INT nPos /* [in] New value */,
1565 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */ )
1566 {
1567 SCROLLINFO info;
1568 SCROLLBAR_INFO *infoPtr;
1569 INT oldPos;
1570
1571 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1572 oldPos = infoPtr->CurVal;
1573 info.cbSize = sizeof(info);
1574 info.nPos = nPos;
1575 info.fMask = SIF_POS;
1576 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1577 return oldPos;
1578 }
1579
1580
1581 /*************************************************************************
1582 * GetScrollPos (USER.63)
1583 */
1584 INT16 WINAPI GetScrollPos16( HWND16 hwnd, INT16 nBar )
1585 {
1586 return (INT16)GetScrollPos( hwnd, nBar );
1587 }
1588
1589
1590 /*************************************************************************
1591 * GetScrollPos (USER32.@)
1592 *
1593 * RETURNS
1594 * Success: Current position
1595 * Failure: 0
1596 *
1597 * REMARKS
1598 * Note the ambiguity when 0 is returned. Use GetLastError
1599 * to make sure there was an error (and to know which one).
1600 */
1601 INT WINAPI GetScrollPos(
1602 HWND hwnd, /* [in] Handle of window */
1603 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1604 {
1605 SCROLLBAR_INFO *infoPtr;
1606
1607 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1608 return infoPtr->CurVal;
1609 }
1610
1611
1612 /*************************************************************************
1613 * SetScrollRange (USER.64)
1614 */
1615 void WINAPI SetScrollRange16( HWND16 hwnd, INT16 nBar,
1616 INT16 MinVal, INT16 MaxVal, BOOL16 bRedraw )
1617 {
1618 /* Invalid range -> range is set to (0,0) */
1619 if ((INT)MaxVal - (INT)MinVal > 0x7fff) MinVal = MaxVal = 0;
1620 SetScrollRange( hwnd, nBar, MinVal, MaxVal, bRedraw );
1621 }
1622
1623
1624 /*************************************************************************
1625 * SetScrollRange (USER32.@)
1626 *
1627 * RETURNS STD
1628 */
1629 BOOL WINAPI SetScrollRange(
1630 HWND hwnd, /* [in] Handle of window whose scrollbar will be affected */
1631 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1632 INT MinVal, /* [in] New minimum value */
1633 INT MaxVal, /* [in] New maximum value */
1634 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1635 {
1636 SCROLLINFO info;
1637
1638 info.cbSize = sizeof(info);
1639 info.nMin = MinVal;
1640 info.nMax = MaxVal;
1641 info.fMask = SIF_RANGE;
1642 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1643 return TRUE;
1644 }
1645
1646
1647 /*************************************************************************
1648 * SCROLL_SetNCSbState
1649 *
1650 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1651 */
1652 INT SCROLL_SetNCSbState(WND* wndPtr, int vMin, int vMax, int vPos,
1653 int hMin, int hMax, int hPos)
1654 {
1655 INT vA, hA;
1656 SCROLLINFO vInfo, hInfo;
1657
1658 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1659 vInfo.nMin = vMin; hInfo.nMin = hMin;
1660 vInfo.nMax = vMax; hInfo.nMax = hMax;
1661 vInfo.nPos = vPos; hInfo.nPos = hPos;
1662 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1663
1664 SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_VERT, &vInfo, &vA );
1665 SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_HORZ, &hInfo, &hA );
1666
1667 if( !SCROLL_ShowScrollBar( wndPtr->hwndSelf, SB_BOTH,
1668 (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1669 {
1670 /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1671 if( vA & SA_SSI_REFRESH )
1672 SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_VERT, FALSE, TRUE );
1673
1674 if( hA & SA_SSI_REFRESH )
1675 SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_HORZ, FALSE, TRUE );
1676 }
1677 return 0;
1678 }
1679
1680
1681 /*************************************************************************
1682 * GetScrollRange (USER.65)
1683 */
1684 BOOL16 WINAPI GetScrollRange16( HWND16 hwnd, INT16 nBar,
1685 LPINT16 lpMin, LPINT16 lpMax)
1686 {
1687 INT min, max;
1688 BOOL16 ret = GetScrollRange( hwnd, nBar, &min, &max );
1689 if (lpMin) *lpMin = min;
1690 if (lpMax) *lpMax = max;
1691 return ret;
1692 }
1693
1694
1695 /*************************************************************************
1696 * GetScrollRange (USER32.@)
1697 *
1698 * RETURNS STD
1699 */
1700 BOOL WINAPI GetScrollRange(
1701 HWND hwnd, /* [in] Handle of window */
1702 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1703 LPINT lpMin, /* [out] Where to store minimum value */
1704 LPINT lpMax /* [out] Where to store maximum value */)
1705 {
1706 SCROLLBAR_INFO *infoPtr;
1707
1708 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1709 {
1710 if (lpMin) lpMin = 0;
1711 if (lpMax) lpMax = 0;
1712 return FALSE;
1713 }
1714 if (lpMin) *lpMin = infoPtr->MinVal;
1715 if (lpMax) *lpMax = infoPtr->MaxVal;
1716 return TRUE;
1717 }
1718
1719
1720 /*************************************************************************
1721 * SCROLL_ShowScrollBar()
1722 *
1723 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1724 */
1725 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1726 BOOL fShowH, BOOL fShowV )
1727 {
1728 WND *wndPtr = WIN_FindWndPtr( hwnd );
1729 BOOL retvalue = FALSE;
1730
1731 if (!wndPtr) return FALSE;
1732 TRACE("hwnd=%04x bar=%d horz=%d, vert=%d\n",
1733 hwnd, nBar, fShowH, fShowV );
1734
1735 switch(nBar)
1736 {
1737 case SB_CTL:
1738 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1739 retvalue = TRUE;
1740 goto END;
1741
1742 case SB_BOTH:
1743 case SB_HORZ:
1744 if (fShowH)
1745 {
1746 fShowH = !(wndPtr->dwStyle & WS_HSCROLL);
1747 wndPtr->dwStyle |= WS_HSCROLL;
1748 }
1749 else /* hide it */
1750 {
1751 fShowH = (wndPtr->dwStyle & WS_HSCROLL);
1752 wndPtr->dwStyle &= ~WS_HSCROLL;
1753 }
1754 if( nBar == SB_HORZ ) {
1755 fShowV = FALSE;
1756 break;
1757 }
1758 /* fall through */
1759
1760 case SB_VERT:
1761 if (fShowV)
1762 {
1763 fShowV = !(wndPtr->dwStyle & WS_VSCROLL);
1764 wndPtr->dwStyle |= WS_VSCROLL;
1765 }
1766 else /* hide it */
1767 {
1768 fShowV = (wndPtr->dwStyle & WS_VSCROLL);
1769 wndPtr->dwStyle &= ~WS_VSCROLL;
1770 }
1771 if ( nBar == SB_VERT )
1772 fShowH = FALSE;
1773 break;
1774
1775 default:
1776 retvalue = FALSE; /* Nothing to do! */
1777 goto END;
1778 }
1779
1780 if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1781 {
1782 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1783 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1784 retvalue = TRUE;
1785 goto END;
1786 }
1787
1788 retvalue = FALSE; /* no frame changes */
1789 END:
1790 WIN_ReleaseWndPtr(wndPtr);
1791 return retvalue;
1792 }
1793
1794
1795 /*************************************************************************
1796 * ShowScrollBar (USER.267)
1797 */
1798 void WINAPI ShowScrollBar16( HWND16 hwnd, INT16 nBar, BOOL16 fShow )
1799 {
1800 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1801 (nBar == SB_HORZ) ? 0 : fShow );
1802 }
1803
1804
1805 /*************************************************************************
1806 * ShowScrollBar (USER32.@)
1807 *
1808 * RETURNS STD
1809 */
1810 BOOL WINAPI ShowScrollBar(
1811 HWND hwnd, /* [in] Handle of window whose scrollbar(s) will be affected */
1812 INT nBar, /* [in] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1813 BOOL fShow /* [in] TRUE = show, FALSE = hide */)
1814 {
1815 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1816 (nBar == SB_HORZ) ? 0 : fShow );
1817 return TRUE;
1818 }
1819
1820
1821 /*************************************************************************
1822 * EnableScrollBar (USER.482)
1823 */
1824 BOOL16 WINAPI EnableScrollBar16( HWND16 hwnd, INT16 nBar, UINT16 flags )
1825 {
1826 return EnableScrollBar( hwnd, nBar, flags );
1827 }
1828
1829
1830 /*************************************************************************
1831 * EnableScrollBar (USER32.@)
1832 */
1833 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1834 {
1835 BOOL bFineWithMe;
1836 SCROLLBAR_INFO *infoPtr;
1837
1838 TRACE("%04x %d %d\n", hwnd, nBar, flags );
1839
1840 flags &= ESB_DISABLE_BOTH;
1841
1842 if (nBar == SB_BOTH)
1843 {
1844 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE;
1845 if (!(bFineWithMe = (infoPtr->flags == flags)) )
1846 {
1847 infoPtr->flags = flags;
1848 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1849 }
1850 nBar = SB_HORZ;
1851 }
1852 else
1853 bFineWithMe = TRUE;
1854
1855 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1856 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1857 infoPtr->flags = flags;
1858
1859 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1860 return TRUE;
1861 }
Windows API implementation