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Moved scrollbar tracking code to scroll.c.
[wine/multimedia.git] / controls / scroll.c
blob55b330db47c8d2595732b91f5dd13f27b3f2dabf
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 #include "spy.h"
16
17 DEFAULT_DEBUG_CHANNEL(scroll);
18
19 typedef struct
20 {
21 INT CurVal; /* Current scroll-bar value */
22 INT MinVal; /* Minimum scroll-bar value */
23 INT MaxVal; /* Maximum scroll-bar value */
24 INT Page; /* Page size of scroll bar (Win32) */
25 UINT flags; /* EnableScrollBar flags */
26 } SCROLLBAR_INFO;
27
28
29 static HBITMAP hUpArrow;
30 static HBITMAP hDnArrow;
31 static HBITMAP hLfArrow;
32 static HBITMAP hRgArrow;
33 static HBITMAP hUpArrowD;
34 static HBITMAP hDnArrowD;
35 static HBITMAP hLfArrowD;
36 static HBITMAP hRgArrowD;
37 static HBITMAP hUpArrowI;
38 static HBITMAP hDnArrowI;
39 static HBITMAP hLfArrowI;
40 static HBITMAP hRgArrowI;
41
42 #define TOP_ARROW(flags,pressed) \
43 (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
44 #define BOTTOM_ARROW(flags,pressed) \
45 (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
46 #define LEFT_ARROW(flags,pressed) \
47 (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
48 #define RIGHT_ARROW(flags,pressed) \
49 (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
50
51
52 /* Minimum size of the rectangle between the arrows */
53 #define SCROLL_MIN_RECT 4
54
55 /* Minimum size of the thumb in pixels */
56 #define SCROLL_MIN_THUMB 6
57
58 /* Overlap between arrows and thumb */
59 #define SCROLL_ARROW_THUMB_OVERLAP ((TWEAK_WineLook == WIN31_LOOK) ? 1 : 0)
60
61 /* Delay (in ms) before first repetition when holding the button down */
62 #define SCROLL_FIRST_DELAY 200
63
64 /* Delay (in ms) between scroll repetitions */
65 #define SCROLL_REPEAT_DELAY 50
66
67 /* Scroll timer id */
68 #define SCROLL_TIMER 0
69
70 /* Scroll-bar hit testing */
71 enum SCROLL_HITTEST
72 {
73 SCROLL_NOWHERE, /* Outside the scroll bar */
74 SCROLL_TOP_ARROW, /* Top or left arrow */
75 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
76 SCROLL_THUMB, /* Thumb rectangle */
77 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
78 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
79 };
80
81 /* What to do after SCROLL_SetScrollInfo() */
82 #define SA_SSI_HIDE 0x0001
83 #define SA_SSI_SHOW 0x0002
84 #define SA_SSI_REFRESH 0x0004
85 #define SA_SSI_REPAINT_ARROWS 0x0008
86
87 /* Thumb-tracking info */
88 static HWND SCROLL_TrackingWin = 0;
89 static INT SCROLL_TrackingBar = 0;
90 static INT SCROLL_TrackingPos = 0;
91 static INT SCROLL_TrackingVal = 0;
92 /* Hit test code of the last button-down event */
93 static enum SCROLL_HITTEST SCROLL_trackHitTest;
94 static BOOL SCROLL_trackVertical;
95
96 /* Is the moving thumb being displayed? */
97 static BOOL SCROLL_MovingThumb = FALSE;
98
99 /* Local functions */
100 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
101 BOOL fShowH, BOOL fShowV );
102 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
103 const SCROLLINFO *info, INT *action );
104 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
105 RECT *rect, INT arrowSize,
106 INT thumbSize, INT thumbPos,
107 UINT flags, BOOL vertical,
108 BOOL top_selected, BOOL bottom_selected );
109 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
110
111
112 /*********************************************************************
113 * scrollbar class descriptor
114 */
115 const struct builtin_class_descr SCROLL_builtin_class =
116 {
117 "ScrollBar", /* name */
118 CS_GLOBALCLASS | CS_DBLCLKS | CS_VREDRAW | CS_HREDRAW | CS_PARENTDC, /* style */
119 NULL, /* procA (winproc is Unicode only) */
120 ScrollBarWndProc, /* procW */
121 sizeof(SCROLLBAR_INFO), /* extra */
122 IDC_ARROWA, /* cursor */
123 0 /* brush */
124 };
125
126
127 /***********************************************************************
128 * SCROLL_LoadBitmaps
129 */
130 static void SCROLL_LoadBitmaps(void)
131 {
132 hUpArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
133 hDnArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
134 hLfArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
135 hRgArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
136 hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
137 hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
138 hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
139 hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
140 hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
141 hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
142 hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
143 hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
144 }
145
146
147 /***********************************************************************
148 * SCROLL_GetScrollInfo
149 */
150 static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND hwnd, INT nBar )
151 {
152 SCROLLBAR_INFO *infoPtr;
153 WND *wndPtr = WIN_FindWndPtr( hwnd );
154
155 if (!wndPtr) return NULL;
156 switch(nBar)
157 {
158 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
159 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
160 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
161 default:
162 WIN_ReleaseWndPtr( wndPtr );
163 return NULL;
164 }
165
166 if (!infoPtr) /* Create the info structure if needed */
167 {
168 if ((infoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(SCROLLBAR_INFO) )))
169 {
170 infoPtr->MinVal = infoPtr->CurVal = infoPtr->Page = 0;
171 infoPtr->MaxVal = 100;
172 infoPtr->flags = ESB_ENABLE_BOTH;
173 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
174 else wndPtr->pVScroll = infoPtr;
175 }
176 if (!hUpArrow) SCROLL_LoadBitmaps();
177 }
178 WIN_ReleaseWndPtr( wndPtr );
179 return infoPtr;
180 }
181
182
183 /***********************************************************************
184 * SCROLL_GetScrollBarRect
185 *
186 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
187 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
188 * 'arrowSize' returns the width or height of an arrow (depending on
189 * the orientation of the scrollbar), 'thumbSize' returns the size of
190 * the thumb, and 'thumbPos' returns the position of the thumb
191 * relative to the left or to the top.
192 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
193 */
194 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
195 INT *arrowSize, INT *thumbSize,
196 INT *thumbPos )
197 {
198 INT pixels;
199 BOOL vertical;
200 WND *wndPtr = WIN_FindWndPtr( hwnd );
201
202 switch(nBar)
203 {
204 case SB_HORZ:
205 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
206 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
207 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
208 lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
209 if(wndPtr->dwStyle & WS_BORDER) {
210 lprect->left--;
211 lprect->right++;
212 } else if(wndPtr->dwStyle & WS_VSCROLL)
213 lprect->right++;
214 vertical = FALSE;
215 break;
216
217 case SB_VERT:
218 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
219 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
220 lprect->right = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
221 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
222 if(wndPtr->dwStyle & WS_BORDER) {
223 lprect->top--;
224 lprect->bottom++;
225 } else if(wndPtr->dwStyle & WS_HSCROLL)
226 lprect->bottom++;
227 vertical = TRUE;
228 break;
229
230 case SB_CTL:
231 GetClientRect( hwnd, lprect );
232 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
233 break;
234
235 default:
236 WIN_ReleaseWndPtr(wndPtr);
237 return FALSE;
238 }
239
240 if (vertical) pixels = lprect->bottom - lprect->top;
241 else pixels = lprect->right - lprect->left;
242
243 if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
244 {
245 if (pixels > SCROLL_MIN_RECT)
246 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
247 else
248 *arrowSize = 0;
249 *thumbPos = *thumbSize = 0;
250 }
251 else
252 {
253 SCROLLBAR_INFO *info = SCROLL_GetScrollInfo( hwnd, nBar );
254
255 *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
256 pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
257
258 if (info->Page)
259 {
260 *thumbSize = pixels * info->Page / (info->MaxVal-info->MinVal+1);
261 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
262 }
263 else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
264
265 if (((pixels -= *thumbSize ) < 0) ||
266 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
267 {
268 /* Rectangle too small or scrollbar disabled -> no thumb */
269 *thumbPos = *thumbSize = 0;
270 }
271 else
272 {
273 INT max = info->MaxVal - max( info->Page-1, 0 );
274 if (info->MinVal >= max)
275 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
276 else
277 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
278 + pixels * (info->CurVal-info->MinVal) / (max - info->MinVal);
279 }
280 }
281 WIN_ReleaseWndPtr(wndPtr);
282 return vertical;
283 }
284
285
286 /***********************************************************************
287 * SCROLL_GetThumbVal
288 *
289 * Compute the current scroll position based on the thumb position in pixels
290 * from the top of the scroll-bar.
291 */
292 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
293 BOOL vertical, INT pos )
294 {
295 INT thumbSize;
296 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
297
298 if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
299 return infoPtr->MinVal;
300
301 if (infoPtr->Page)
302 {
303 thumbSize = pixels * infoPtr->Page/(infoPtr->MaxVal-infoPtr->MinVal+1);
304 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
305 }
306 else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
307
308 if ((pixels -= thumbSize) <= 0) return infoPtr->MinVal;
309
310 pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
311 if (pos > pixels) pos = pixels;
312
313 if (!infoPtr->Page) pos *= infoPtr->MaxVal - infoPtr->MinVal;
314 else pos *= infoPtr->MaxVal - infoPtr->MinVal - infoPtr->Page + 1;
315 return infoPtr->MinVal + ((pos + pixels / 2) / pixels);
316 }
317
318 /***********************************************************************
319 * SCROLL_PtInRectEx
320 */
321 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
322 {
323 RECT rect = *lpRect;
324
325 if (vertical)
326 {
327 rect.left -= lpRect->right - lpRect->left;
328 rect.right += lpRect->right - lpRect->left;
329 }
330 else
331 {
332 rect.top -= lpRect->bottom - lpRect->top;
333 rect.bottom += lpRect->bottom - lpRect->top;
334 }
335 return PtInRect( &rect, pt );
336 }
337
338 /***********************************************************************
339 * SCROLL_ClipPos
340 */
341 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
342 {
343 if( pt.x < lpRect->left )
344 pt.x = lpRect->left;
345 else
346 if( pt.x > lpRect->right )
347 pt.x = lpRect->right;
348
349 if( pt.y < lpRect->top )
350 pt.y = lpRect->top;
351 else
352 if( pt.y > lpRect->bottom )
353 pt.y = lpRect->bottom;
354
355 return pt;
356 }
357
358
359 /***********************************************************************
360 * SCROLL_HitTest
361 *
362 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
363 */
364 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
365 POINT pt, BOOL bDragging )
366 {
367 INT arrowSize, thumbSize, thumbPos;
368 RECT rect;
369
370 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
371 &arrowSize, &thumbSize, &thumbPos );
372
373 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
374 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
375
376 if (vertical)
377 {
378 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
379 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
380 if (!thumbPos) return SCROLL_TOP_RECT;
381 pt.y -= rect.top;
382 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
383 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
384 }
385 else /* horizontal */
386 {
387 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
388 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
389 if (!thumbPos) return SCROLL_TOP_RECT;
390 pt.x -= rect.left;
391 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
392 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
393 }
394 return SCROLL_THUMB;
395 }
396
397
398 /***********************************************************************
399 * SCROLL_DrawArrows
400 *
401 * Draw the scroll bar arrows.
402 */
403 static void SCROLL_DrawArrows_9x( HDC hdc, SCROLLBAR_INFO *infoPtr,
404 RECT *rect, INT arrowSize, BOOL vertical,
405 BOOL top_pressed, BOOL bottom_pressed )
406 {
407 RECT r;
408
409 r = *rect;
410 if( vertical )
411 r.bottom = r.top + arrowSize;
412 else
413 r.right = r.left + arrowSize;
414
415 DrawFrameControl( hdc, &r, DFC_SCROLL,
416 (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
417 | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
418 | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
419
420 r = *rect;
421 if( vertical )
422 r.top = r.bottom-arrowSize;
423 else
424 r.left = r.right-arrowSize;
425
426 DrawFrameControl( hdc, &r, DFC_SCROLL,
427 (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
428 | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
429 | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
430 }
431
432 static void SCROLL_DrawArrows_31( HDC hdc, SCROLLBAR_INFO *infoPtr,
433 RECT *rect, INT arrowSize, BOOL vertical,
434 BOOL top_pressed, BOOL bottom_pressed )
435 {
436 HDC hdcMem = CreateCompatibleDC( hdc );
437 HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
438 TOP_ARROW(infoPtr->flags, top_pressed)
439 : LEFT_ARROW(infoPtr->flags, top_pressed));
440
441 SetStretchBltMode( hdc, STRETCH_DELETESCANS );
442 StretchBlt( hdc, rect->left, rect->top,
443 vertical ? rect->right-rect->left : arrowSize,
444 vertical ? arrowSize : rect->bottom-rect->top,
445 hdcMem, 0, 0,
446 GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
447 SRCCOPY );
448
449 SelectObject( hdcMem, vertical ?
450 BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
451 : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
452 if (vertical)
453 StretchBlt( hdc, rect->left, rect->bottom - arrowSize,
454 rect->right - rect->left, arrowSize,
455 hdcMem, 0, 0,
456 GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
457 SRCCOPY );
458 else
459 StretchBlt( hdc, rect->right - arrowSize, rect->top,
460 arrowSize, rect->bottom - rect->top,
461 hdcMem, 0, 0,
462 GetSystemMetrics(SM_CXVSCROLL), GetSystemMetrics(SM_CYHSCROLL),
463 SRCCOPY );
464 SelectObject( hdcMem, hbmpPrev );
465 DeleteDC( hdcMem );
466 }
467
468 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
469 RECT *rect, INT arrowSize, BOOL vertical,
470 BOOL top_pressed, BOOL bottom_pressed )
471 {
472 if( TWEAK_WineLook == WIN31_LOOK )
473 SCROLL_DrawArrows_31( hdc, infoPtr, rect, arrowSize,
474 vertical, top_pressed,bottom_pressed );
475 else
476 SCROLL_DrawArrows_9x( hdc, infoPtr, rect, arrowSize,
477 vertical, top_pressed,bottom_pressed );
478 }
479
480
481 /***********************************************************************
482 * SCROLL_DrawMovingThumb
483 *
484 * Draw the moving thumb rectangle.
485 */
486 static void SCROLL_DrawMovingThumb_31( HDC hdc, RECT *rect, BOOL vertical,
487 INT arrowSize, INT thumbSize )
488 {
489 RECT r = *rect;
490 if (vertical)
491 {
492 r.top += SCROLL_TrackingPos;
493 if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
494 r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
495 if (r.top + thumbSize >
496 rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
497 r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
498 - thumbSize;
499 r.bottom = r.top + thumbSize;
500 }
501 else
502 {
503 r.left += SCROLL_TrackingPos;
504 if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
505 r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
506 if (r.left + thumbSize >
507 rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
508 r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
509 - thumbSize;
510 r.right = r.left + thumbSize;
511 }
512
513 DrawFocusRect( hdc, &r );
514 SCROLL_MovingThumb = !SCROLL_MovingThumb;
515 }
516
517 static void SCROLL_DrawMovingThumb_9x( HDC hdc, RECT *rect, BOOL vertical,
518 INT arrowSize, INT thumbSize )
519 {
520 INT pos = SCROLL_TrackingPos;
521 INT max_size;
522
523 if( vertical )
524 max_size = rect->bottom - rect->top;
525 else
526 max_size = rect->right - rect->left;
527
528 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
529
530 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
531 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
532 else if( pos > max_size )
533 pos = max_size;
534
535 SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
536 rect, arrowSize, thumbSize, pos,
537 0, vertical, FALSE, FALSE );
538
539 SCROLL_MovingThumb = !SCROLL_MovingThumb;
540 }
541
542 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
543 INT arrowSize, INT thumbSize )
544 {
545 if( TWEAK_WineLook == WIN31_LOOK )
546 SCROLL_DrawMovingThumb_31( hdc, rect, vertical, arrowSize, thumbSize );
547 else
548 SCROLL_DrawMovingThumb_9x( hdc, rect, vertical, arrowSize, thumbSize );
549 }
550
551 /***********************************************************************
552 * SCROLL_DrawInterior
553 *
554 * Draw the scroll bar interior (everything except the arrows).
555 */
556 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
557 RECT *rect, INT arrowSize,
558 INT thumbSize, INT thumbPos,
559 UINT flags, BOOL vertical,
560 BOOL top_selected, BOOL bottom_selected )
561 {
562 RECT r;
563 HPEN hSavePen;
564 HBRUSH hSaveBrush,hBrush;
565
566 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
567 * The window-owned scrollbars need to call DEFWND_ControlColor
568 * to correctly setup default scrollbar colors
569 */
570 if (nBar == SB_CTL)
571 {
572 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
573 (WPARAM)hdc,(LPARAM)hwnd);
574 }
575 else
576 {
577 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
578 }
579
580 hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
581 hSaveBrush = SelectObject( hdc, hBrush );
582
583 /* Calculate the scroll rectangle */
584 r = *rect;
585 if (vertical)
586 {
587 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
588 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
589 }
590 else
591 {
592 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
593 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
594 }
595
596 /* Draw the scroll rectangles and thumb */
597 if (!thumbPos) /* No thumb to draw */
598 {
599 PatBlt( hdc, r.left, r.top,
600 r.right - r.left, r.bottom - r.top,
601 PATCOPY );
602
603 /* cleanup and return */
604 SelectObject( hdc, hSavePen );
605 SelectObject( hdc, hSaveBrush );
606 return;
607 }
608
609 if (vertical)
610 {
611 PatBlt( hdc, r.left, r.top,
612 r.right - r.left,
613 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
614 top_selected ? 0x0f0000 : PATCOPY );
615 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
616 PatBlt( hdc, r.left, r.top + thumbSize,
617 r.right - r.left,
618 r.bottom - r.top - thumbSize,
619 bottom_selected ? 0x0f0000 : PATCOPY );
620 r.bottom = r.top + thumbSize;
621 }
622 else /* horizontal */
623 {
624 PatBlt( hdc, r.left, r.top,
625 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
626 r.bottom - r.top,
627 top_selected ? 0x0f0000 : PATCOPY );
628 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
629 PatBlt( hdc, r.left + thumbSize, r.top,
630 r.right - r.left - thumbSize,
631 r.bottom - r.top,
632 bottom_selected ? 0x0f0000 : PATCOPY );
633 r.right = r.left + thumbSize;
634 }
635
636 /* Draw the thumb */
637 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
638
639 /* cleanup */
640 SelectObject( hdc, hSavePen );
641 SelectObject( hdc, hSaveBrush );
642 }
643
644
645 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
646 RECT *rect, INT arrowSize,
647 INT thumbSize, INT thumbPos,
648 UINT flags, BOOL vertical,
649 BOOL top_selected, BOOL bottom_selected )
650 {
651 RECT r;
652 HPEN hSavePen;
653 HBRUSH hSaveBrush,hBrush;
654 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
655
656 if (Save_SCROLL_MovingThumb &&
657 (SCROLL_TrackingWin == hwnd) &&
658 (SCROLL_TrackingBar == nBar))
659 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
660
661 /* Select the correct brush and pen */
662
663 if (TWEAK_WineLook == WIN31_LOOK && (flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
664 {
665 /* This ought to be the color of the parent window */
666 hBrush = GetSysColorBrush(COLOR_WINDOW);
667 }
668 else
669 {
670 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
671 * The window-owned scrollbars need to call DEFWND_ControlColor
672 * to correctly setup default scrollbar colors
673 */
674 if (nBar == SB_CTL) {
675 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
676 (WPARAM)hdc,(LPARAM)hwnd);
677 } else {
678 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
679 }
680 }
681 hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
682 hSaveBrush = SelectObject( hdc, hBrush );
683
684 /* Calculate the scroll rectangle */
685
686 r = *rect;
687 if (vertical)
688 {
689 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
690 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
691 }
692 else
693 {
694 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
695 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
696 }
697
698 /* Draw the scroll bar frame */
699
700 /* Only draw outline if Win 3.1. Mar 24, 1999 - Ronald B. Cemer */
701 if (TWEAK_WineLook == WIN31_LOOK)
702 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
703
704 /* Draw the scroll rectangles and thumb */
705
706 if (!thumbPos) /* No thumb to draw */
707 {
708 INT offset = (TWEAK_WineLook > WIN31_LOOK) ? 0 : 1;
709
710 PatBlt( hdc, r.left+offset, r.top+offset,
711 r.right - r.left - 2*offset, r.bottom - r.top - 2*offset,
712 PATCOPY );
713
714 /* cleanup and return */
715 SelectObject( hdc, hSavePen );
716 SelectObject( hdc, hSaveBrush );
717 return;
718 }
719
720 if (vertical)
721 {
722 INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
723
724 PatBlt( hdc, r.left + offset, r.top + offset,
725 r.right - r.left - offset*2,
726 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - offset,
727 top_selected ? 0x0f0000 : PATCOPY );
728 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
729 PatBlt( hdc, r.left + offset, r.top + thumbSize,
730 r.right - r.left - offset*2,
731 r.bottom - r.top - thumbSize - offset,
732 bottom_selected ? 0x0f0000 : PATCOPY );
733 r.bottom = r.top + thumbSize;
734 }
735 else /* horizontal */
736 {
737 INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
738
739 PatBlt( hdc, r.left + offset, r.top + offset,
740 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
741 r.bottom - r.top - offset*2,
742 top_selected ? 0x0f0000 : PATCOPY );
743 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
744 PatBlt( hdc, r.left + thumbSize, r.top + offset,
745 r.right - r.left - thumbSize - offset,
746 r.bottom - r.top - offset*2,
747 bottom_selected ? 0x0f0000 : PATCOPY );
748 r.right = r.left + thumbSize;
749 }
750
751 /* Draw the thumb */
752
753 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
754 if (TWEAK_WineLook == WIN31_LOOK)
755 {
756 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
757 r.top++, r.left++;
758 }
759 else
760 {
761 Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
762 }
763 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
764
765 if (Save_SCROLL_MovingThumb &&
766 (SCROLL_TrackingWin == hwnd) &&
767 (SCROLL_TrackingBar == nBar))
768 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
769
770 /* cleanup */
771 SelectObject( hdc, hSavePen );
772 SelectObject( hdc, hSaveBrush );
773 }
774
775
776 /***********************************************************************
777 * SCROLL_DrawScrollBar
778 *
779 * Redraw the whole scrollbar.
780 */
781 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
782 BOOL arrows, BOOL interior )
783 {
784 INT arrowSize, thumbSize, thumbPos;
785 RECT rect;
786 BOOL vertical;
787 WND *wndPtr = WIN_FindWndPtr( hwnd );
788 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
789 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
790
791 if (!wndPtr || !infoPtr ||
792 ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
793 ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
794 if (!WIN_IsWindowDrawable( hwnd, FALSE )) goto END;
795 hwnd = wndPtr->hwndSelf; /* make it a full handle */
796
797 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
798 &arrowSize, &thumbSize, &thumbPos );
799
800 /* do not draw if the scrollbar rectangle is empty */
801 if(IsRectEmpty(&rect))
802 goto END;
803
804 if (Save_SCROLL_MovingThumb &&
805 (SCROLL_TrackingWin == hwnd) &&
806 (SCROLL_TrackingBar == nBar))
807 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
808
809 /* Draw the arrows */
810
811 if (arrows && arrowSize)
812 {
813 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
814 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
815 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
816 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
817 else
818 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
819 FALSE, FALSE );
820 }
821 if( interior )
822 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
823 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
824
825 if (Save_SCROLL_MovingThumb &&
826 (SCROLL_TrackingWin == hwnd) &&
827 (SCROLL_TrackingBar == nBar))
828 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
829
830 /* if scroll bar has focus, reposition the caret */
831 if(hwnd==GetFocus() && (nBar==SB_CTL))
832 {
833 if (!vertical)
834 {
835 SetCaretPos(thumbPos+1, rect.top+1);
836 }
837 else
838 {
839 SetCaretPos(rect.top+1, thumbPos+1);
840 }
841 }
842
843 END:
844 WIN_ReleaseWndPtr(wndPtr);
845 }
846
847
848 /***********************************************************************
849 * SCROLL_RefreshScrollBar
850 *
851 * Repaint the scroll bar interior after a SetScrollRange() or
852 * SetScrollPos() call.
853 */
854 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
855 BOOL arrows, BOOL interior )
856 {
857 HDC hdc = GetDCEx( hwnd, 0,
858 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
859 if (!hdc) return;
860
861 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
862 ReleaseDC( hwnd, hdc );
863 }
864
865
866 /***********************************************************************
867 * SCROLL_HandleKbdEvent
868 *
869 * Handle a keyboard event (only for SB_CTL scrollbars).
870 */
871 static void SCROLL_HandleKbdEvent( HWND hwnd, WPARAM wParam )
872 {
873 WPARAM msg;
874
875 switch(wParam)
876 {
877 case VK_PRIOR: msg = SB_PAGEUP; break;
878 case VK_NEXT: msg = SB_PAGEDOWN; break;
879 case VK_HOME: msg = SB_TOP; break;
880 case VK_END: msg = SB_BOTTOM; break;
881 case VK_UP: msg = SB_LINEUP; break;
882 case VK_DOWN: msg = SB_LINEDOWN; break;
883 default: return;
884 }
885 SendMessageW( GetParent(hwnd),
886 (GetWindowLongA( hwnd, GWL_STYLE ) & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
887 msg, (LPARAM)hwnd );
888 }
889
890
891 /***********************************************************************
892 * SCROLL_HandleScrollEvent
893 *
894 * Handle a mouse or timer event for the scrollbar.
895 * 'pt' is the location of the mouse event in client (for SB_CTL) or
896 * windows coordinates.
897 */
898 static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
899 {
900 /* Previous mouse position for timer events */
901 static POINT prevPt;
902 /* Thumb position when tracking started. */
903 static UINT trackThumbPos;
904 /* Position in the scroll-bar of the last button-down event. */
905 static INT lastClickPos;
906 /* Position in the scroll-bar of the last mouse event. */
907 static INT lastMousePos;
908
909 enum SCROLL_HITTEST hittest;
910 HWND hwndOwner, hwndCtl;
911 BOOL vertical;
912 INT arrowSize, thumbSize, thumbPos;
913 RECT rect;
914 HDC hdc;
915
916 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
917 if (!infoPtr) return;
918 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
919 return;
920
921 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
922 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
923 &arrowSize, &thumbSize, &thumbPos );
924 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
925 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
926
927 switch(msg)
928 {
929 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
930 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
931 SCROLL_trackVertical = vertical;
932 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
933 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
934 lastMousePos = lastClickPos;
935 trackThumbPos = thumbPos;
936 prevPt = pt;
937 if (nBar == SB_CTL && (GetWindowLongA(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
938 SetCapture( hwnd );
939 break;
940
941 case WM_MOUSEMOVE:
942 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
943 prevPt = pt;
944 break;
945
946 case WM_LBUTTONUP:
947 hittest = SCROLL_NOWHERE;
948 ReleaseCapture();
949 /* if scrollbar has focus, show back caret */
950 if (hwnd==GetFocus()) ShowCaret(hwnd);
951 break;
952
953 case WM_SYSTIMER:
954 pt = prevPt;
955 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
956 break;
957
958 default:
959 return; /* Should never happen */
960 }
961
962 TRACE("Event: hwnd=%04x bar=%d msg=%s pt=%ld,%ld hit=%d\n",
963 hwnd, nBar, SPY_GetMsgName(msg,hwnd), pt.x, pt.y, hittest );
964
965 switch(SCROLL_trackHitTest)
966 {
967 case SCROLL_NOWHERE: /* No tracking in progress */
968 break;
969
970 case SCROLL_TOP_ARROW:
971 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
972 (hittest == SCROLL_trackHitTest), FALSE );
973 if (hittest == SCROLL_trackHitTest)
974 {
975 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
976 {
977 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
978 SB_LINEUP, (LPARAM)hwndCtl );
979 }
980
981 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
982 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
983 (TIMERPROC)0 );
984 }
985 else KillSystemTimer( hwnd, SCROLL_TIMER );
986 break;
987
988 case SCROLL_TOP_RECT:
989 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
990 thumbPos, infoPtr->flags, vertical,
991 (hittest == SCROLL_trackHitTest), FALSE );
992 if (hittest == SCROLL_trackHitTest)
993 {
994 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
995 {
996 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
997 SB_PAGEUP, (LPARAM)hwndCtl );
998 }
999 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1000 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1001 (TIMERPROC)0 );
1002 }
1003 else KillSystemTimer( hwnd, SCROLL_TIMER );
1004 break;
1005
1006 case SCROLL_THUMB:
1007 if (msg == WM_LBUTTONDOWN)
1008 {
1009 SCROLL_TrackingWin = hwnd;
1010 SCROLL_TrackingBar = nBar;
1011 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
1012 if (!SCROLL_MovingThumb)
1013 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1014 }
1015 else if (msg == WM_LBUTTONUP)
1016 {
1017 if (SCROLL_MovingThumb)
1018 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1019 SCROLL_TrackingWin = 0;
1020 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1021 thumbPos, infoPtr->flags, vertical,
1022 FALSE, FALSE );
1023 }
1024 else /* WM_MOUSEMOVE */
1025 {
1026 UINT pos;
1027
1028 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
1029 else
1030 {
1031 pt = SCROLL_ClipPos( &rect, pt );
1032 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
1033 }
1034 if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
1035 {
1036 if (SCROLL_MovingThumb)
1037 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1038 arrowSize, thumbSize );
1039 lastMousePos = pos;
1040 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
1041 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1042 vertical,
1043 SCROLL_TrackingPos );
1044 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1045 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1046 (LPARAM)hwndCtl );
1047 if (!SCROLL_MovingThumb)
1048 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1049 arrowSize, thumbSize );
1050 }
1051 }
1052 break;
1053
1054 case SCROLL_BOTTOM_RECT:
1055 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1056 thumbPos, infoPtr->flags, vertical,
1057 FALSE, (hittest == SCROLL_trackHitTest) );
1058 if (hittest == SCROLL_trackHitTest)
1059 {
1060 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1061 {
1062 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1063 SB_PAGEDOWN, (LPARAM)hwndCtl );
1064 }
1065 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1066 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1067 (TIMERPROC)0 );
1068 }
1069 else KillSystemTimer( hwnd, SCROLL_TIMER );
1070 break;
1071
1072 case SCROLL_BOTTOM_ARROW:
1073 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1074 FALSE, (hittest == SCROLL_trackHitTest) );
1075 if (hittest == SCROLL_trackHitTest)
1076 {
1077 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1078 {
1079 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1080 SB_LINEDOWN, (LPARAM)hwndCtl );
1081 }
1082
1083 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1084 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1085 (TIMERPROC)0 );
1086 }
1087 else KillSystemTimer( hwnd, SCROLL_TIMER );
1088 break;
1089 }
1090
1091 if (msg == WM_LBUTTONUP)
1092 {
1093 hittest = SCROLL_trackHitTest;
1094 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1095
1096 if (hittest == SCROLL_THUMB)
1097 {
1098 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1099 trackThumbPos + lastMousePos - lastClickPos );
1100 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1101 MAKEWPARAM( SB_THUMBPOSITION, val ), (LPARAM)hwndCtl );
1102 }
1103 else
1104 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1105 SB_ENDSCROLL, (LPARAM)hwndCtl );
1106 }
1107
1108 ReleaseDC( hwnd, hdc );
1109 }
1110
1111
1112 /***********************************************************************
1113 * SCROLL_TrackScrollBar
1114 *
1115 * Track a mouse button press on a scroll-bar.
1116 * pt is in screen-coordinates for non-client scroll bars.
1117 */
1118 void SCROLL_TrackScrollBar( HWND hwnd, INT scrollbar, POINT pt )
1119 {
1120 MSG msg;
1121 INT xoffset = 0, yoffset = 0;
1122
1123 if (scrollbar != SB_CTL)
1124 {
1125 WND *wndPtr = WIN_GetPtr( hwnd );
1126 if (!wndPtr || wndPtr == WND_OTHER_PROCESS) return;
1127 xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
1128 yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
1129 WIN_ReleasePtr( wndPtr );
1130 ScreenToClient( hwnd, &pt );
1131 pt.x += xoffset;
1132 pt.y += yoffset;
1133 }
1134
1135 SCROLL_HandleScrollEvent( hwnd, scrollbar, WM_LBUTTONDOWN, pt );
1136
1137 do
1138 {
1139 if (!GetMessageW( &msg, 0, 0, 0 )) break;
1140 if (CallMsgFilterW( &msg, MSGF_SCROLLBAR )) continue;
1141 switch(msg.message)
1142 {
1143 case WM_LBUTTONUP:
1144 case WM_MOUSEMOVE:
1145 case WM_SYSTIMER:
1146 pt.x = LOWORD(msg.lParam) + xoffset;
1147 pt.y = HIWORD(msg.lParam) + yoffset;
1148 SCROLL_HandleScrollEvent( hwnd, scrollbar, msg.message, pt );
1149 break;
1150 default:
1151 TranslateMessage( &msg );
1152 DispatchMessageW( &msg );
1153 break;
1154 }
1155 if (!IsWindow( hwnd ))
1156 {
1157 ReleaseCapture();
1158 break;
1159 }
1160 } while (msg.message != WM_LBUTTONUP);
1161 }
1162
1163
1164 /***********************************************************************
1165 * ScrollBarWndProc
1166 */
1167 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1168 {
1169 if (!IsWindow( hwnd )) return 0;
1170
1171 switch(message)
1172 {
1173 case WM_CREATE:
1174 {
1175 CREATESTRUCTW *lpCreat = (CREATESTRUCTW *)lParam;
1176 if (lpCreat->style & SBS_SIZEBOX)
1177 {
1178 FIXME("Unimplemented style SBS_SIZEBOX.\n" );
1179 return 0;
1180 }
1181 if (lpCreat->style & SBS_VERT)
1182 {
1183 if (lpCreat->style & SBS_LEFTALIGN)
1184 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1185 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1186 else if (lpCreat->style & SBS_RIGHTALIGN)
1187 MoveWindow( hwnd,
1188 lpCreat->x+lpCreat->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1189 lpCreat->y,
1190 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1191 }
1192 else /* SBS_HORZ */
1193 {
1194 if (lpCreat->style & SBS_TOPALIGN)
1195 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1196 lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1197 else if (lpCreat->style & SBS_BOTTOMALIGN)
1198 MoveWindow( hwnd,
1199 lpCreat->x,
1200 lpCreat->y+lpCreat->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1201 lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1202 }
1203 }
1204 if (!hUpArrow) SCROLL_LoadBitmaps();
1205 TRACE("ScrollBar creation, hwnd=%04x\n", hwnd );
1206 return 0;
1207
1208 case WM_LBUTTONDOWN:
1209 {
1210 POINT pt;
1211 pt.x = SLOWORD(lParam);
1212 pt.y = SHIWORD(lParam);
1213 SCROLL_TrackScrollBar( hwnd, SB_CTL, pt );
1214 }
1215 break;
1216 case WM_LBUTTONUP:
1217 case WM_MOUSEMOVE:
1218 case WM_SYSTIMER:
1219 {
1220 POINT pt;
1221 pt.x = SLOWORD(lParam);
1222 pt.y = SHIWORD(lParam);
1223 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1224 }
1225 break;
1226
1227 /* if key event is received, the scrollbar has the focus */
1228 case WM_KEYDOWN:
1229 /* hide caret on first KEYDOWN to prevent flicker */
1230 if ((lParam & 0x40000000)==0)
1231 HideCaret(hwnd);
1232 SCROLL_HandleKbdEvent( hwnd, wParam );
1233 break;
1234
1235 case WM_KEYUP:
1236 ShowCaret(hwnd);
1237 break;
1238
1239 case WM_SETFOCUS:
1240 {
1241 /* Create a caret when a ScrollBar get focus */
1242 RECT rect;
1243 int arrowSize, thumbSize, thumbPos, vertical;
1244 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1245 &arrowSize, &thumbSize, &thumbPos );
1246 if (!vertical)
1247 {
1248 CreateCaret(hwnd,1, thumbSize-2, rect.bottom-rect.top-2);
1249 SetCaretPos(thumbPos+1, rect.top+1);
1250 }
1251 else
1252 {
1253 CreateCaret(hwnd,1, rect.right-rect.left-2,thumbSize-2);
1254 SetCaretPos(rect.top+1, thumbPos+1);
1255 }
1256 ShowCaret(hwnd);
1257 }
1258 break;
1259
1260 case WM_KILLFOCUS:
1261 {
1262 RECT rect;
1263 int arrowSize, thumbSize, thumbPos, vertical;
1264 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1265 if (!vertical){
1266 rect.left=thumbPos+1;
1267 rect.right=rect.left+thumbSize;
1268 }
1269 else
1270 {
1271 rect.top=thumbPos+1;
1272 rect.bottom=rect.top+thumbSize;
1273 }
1274 HideCaret(hwnd);
1275 InvalidateRect(hwnd,&rect,0);
1276 DestroyCaret();
1277 }
1278 break;
1279
1280 case WM_ERASEBKGND:
1281 return 1;
1282
1283 case WM_GETDLGCODE:
1284 return DLGC_WANTARROWS; /* Windows returns this value */
1285
1286 case WM_PAINT:
1287 {
1288 PAINTSTRUCT ps;
1289 HDC hdc = BeginPaint( hwnd, &ps );
1290 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1291 EndPaint( hwnd, &ps );
1292 }
1293 break;
1294
1295 case SBM_SETPOS16:
1296 case SBM_SETPOS:
1297 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1298
1299 case SBM_GETPOS16:
1300 case SBM_GETPOS:
1301 return GetScrollPos( hwnd, SB_CTL );
1302
1303 case SBM_SETRANGE16:
1304 SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
1305 wParam /* FIXME: Is this correct? */ );
1306 return 0;
1307
1308 case SBM_SETRANGE:
1309 {
1310 INT oldPos = GetScrollPos( hwnd, SB_CTL );
1311 SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
1312 if (oldPos != GetScrollPos( hwnd, SB_CTL )) return oldPos;
1313 }
1314 return 0;
1315
1316 case SBM_GETRANGE16:
1317 FIXME("don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
1318 return 0;
1319
1320 case SBM_GETRANGE:
1321 GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
1322 return 0;
1323
1324 case SBM_ENABLE_ARROWS16:
1325 case SBM_ENABLE_ARROWS:
1326 return EnableScrollBar( hwnd, SB_CTL, wParam );
1327
1328 case SBM_SETRANGEREDRAW:
1329 {
1330 INT oldPos = GetScrollPos( hwnd, SB_CTL );
1331 SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
1332 if (oldPos != GetScrollPos( hwnd, SB_CTL )) return oldPos;
1333 }
1334 return 0;
1335
1336 case SBM_SETSCROLLINFO:
1337 return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1338
1339 case SBM_GETSCROLLINFO:
1340 return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
1341
1342 case 0x00e5:
1343 case 0x00e7:
1344 case 0x00e8:
1345 case 0x00eb:
1346 case 0x00ec:
1347 case 0x00ed:
1348 case 0x00ee:
1349 case 0x00ef:
1350 ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1351 message, wParam, lParam );
1352 break;
1353
1354 default:
1355 if (message >= WM_USER)
1356 WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1357 message, wParam, lParam );
1358 return DefWindowProcW( hwnd, message, wParam, lParam );
1359 }
1360 return 0;
1361 }
1362
1363
1364 /*************************************************************************
1365 * SetScrollInfo (USER32.@)
1366 * SetScrollInfo can be used to set the position, upper bound,
1367 * lower bound, and page size of a scrollbar control.
1368 *
1369 * RETURNS
1370 * Scrollbar position
1371 *
1372 * NOTE
1373 * For 100 lines of text to be displayed in a window of 25 lines,
1374 * one would for instance use info->nMin=0, info->nMax=75
1375 * (corresponding to the 76 different positions of the window on
1376 * the text), and info->nPage=25.
1377 */
1378 INT WINAPI SetScrollInfo(
1379 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1380 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1381 const SCROLLINFO *info /* [in] Specifies what to change and new values */,
1382 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1383 {
1384 INT action;
1385 INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1386
1387 if( action & SA_SSI_HIDE )
1388 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1389 else
1390 {
1391 if( action & SA_SSI_SHOW )
1392 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1393 return retVal; /* SetWindowPos() already did the painting */
1394
1395 if( bRedraw && (action & SA_SSI_REFRESH))
1396 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1397 else if( action & SA_SSI_REPAINT_ARROWS )
1398 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1399 }
1400 return retVal;
1401 }
1402
1403 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1404 const SCROLLINFO *info, INT *action )
1405 {
1406 /* Update the scrollbar state and set action flags according to
1407 * what has to be done graphics wise. */
1408
1409 SCROLLBAR_INFO *infoPtr;
1410 UINT new_flags;
1411 BOOL bChangeParams = FALSE; /* don't show/hide scrollbar if params don't change */
1412
1413 *action = 0;
1414
1415 if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
1416 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1417 if ((info->cbSize != sizeof(*info)) &&
1418 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1419
1420 if (TRACE_ON(scroll))
1421 {
1422 TRACE("hwnd=%04x bar=%d", hwnd, nBar);
1423 if (info->fMask & SIF_PAGE) DPRINTF( " page=%d", info->nPage );
1424 if (info->fMask & SIF_POS) DPRINTF( " pos=%d", info->nPos );
1425 if (info->fMask & SIF_RANGE) DPRINTF( " min=%d max=%d", info->nMin, info->nMax );
1426 DPRINTF("\n");
1427 }
1428
1429 /* Set the page size */
1430
1431 if (info->fMask & SIF_PAGE)
1432 {
1433 if( infoPtr->Page != info->nPage )
1434 {
1435 infoPtr->Page = info->nPage;
1436 *action |= SA_SSI_REFRESH;
1437 bChangeParams = TRUE;
1438 }
1439 }
1440
1441 /* Set the scroll pos */
1442
1443 if (info->fMask & SIF_POS)
1444 {
1445 if( infoPtr->CurVal != info->nPos )
1446 {
1447 infoPtr->CurVal = info->nPos;
1448 *action |= SA_SSI_REFRESH;
1449 }
1450 }
1451
1452 /* Set the scroll range */
1453
1454 if (info->fMask & SIF_RANGE)
1455 {
1456 /* Invalid range -> range is set to (0,0) */
1457 if ((info->nMin > info->nMax) ||
1458 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1459 {
1460 infoPtr->MinVal = 0;
1461 infoPtr->MaxVal = 0;
1462 bChangeParams = TRUE;
1463 }
1464 else
1465 {
1466 if( infoPtr->MinVal != info->nMin ||
1467 infoPtr->MaxVal != info->nMax )
1468 {
1469 *action |= SA_SSI_REFRESH;
1470 infoPtr->MinVal = info->nMin;
1471 infoPtr->MaxVal = info->nMax;
1472 bChangeParams = TRUE;
1473 }
1474 }
1475 }
1476
1477 /* Make sure the page size is valid */
1478
1479 if (infoPtr->Page < 0) infoPtr->Page = 0;
1480 else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 )
1481 infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1;
1482
1483 /* Make sure the pos is inside the range */
1484
1485 if (infoPtr->CurVal < infoPtr->MinVal)
1486 infoPtr->CurVal = infoPtr->MinVal;
1487 else if (infoPtr->CurVal > infoPtr->MaxVal - max( infoPtr->Page-1, 0 ))
1488 infoPtr->CurVal = infoPtr->MaxVal - max( infoPtr->Page-1, 0 );
1489
1490 TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1491 infoPtr->Page, infoPtr->CurVal,
1492 infoPtr->MinVal, infoPtr->MaxVal );
1493
1494 /* don't change the scrollbar state if SetScrollInfo
1495 * is just called with SIF_DISABLENOSCROLL
1496 */
1497 if(!(info->fMask & SIF_ALL)) goto done;
1498
1499 /* Check if the scrollbar should be hidden or disabled */
1500
1501 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1502 {
1503 new_flags = infoPtr->flags;
1504 if (infoPtr->MinVal >= infoPtr->MaxVal - max( infoPtr->Page-1, 0 ))
1505 {
1506 /* Hide or disable scroll-bar */
1507 if (info->fMask & SIF_DISABLENOSCROLL)
1508 {
1509 new_flags = ESB_DISABLE_BOTH;
1510 *action |= SA_SSI_REFRESH;
1511 }
1512 else if ((nBar != SB_CTL) && bChangeParams)
1513 {
1514 *action = SA_SSI_HIDE;
1515 goto done;
1516 }
1517 }
1518 else /* Show and enable scroll-bar */
1519 {
1520 new_flags = 0;
1521 if ((nBar != SB_CTL) && bChangeParams)
1522 *action |= SA_SSI_SHOW;
1523 }
1524
1525 if (infoPtr->flags != new_flags) /* check arrow flags */
1526 {
1527 infoPtr->flags = new_flags;
1528 *action |= SA_SSI_REPAINT_ARROWS;
1529 }
1530 }
1531
1532 done:
1533 /* Return current position */
1534
1535 return infoPtr->CurVal;
1536 }
1537
1538
1539 /*************************************************************************
1540 * GetScrollInfo (USER32.@)
1541 * GetScrollInfo can be used to retrieve the position, upper bound,
1542 * lower bound, and page size of a scrollbar control.
1543 *
1544 * RETURNS STD
1545 */
1546 BOOL WINAPI GetScrollInfo(
1547 HWND hwnd /* [in] Handle of window */ ,
1548 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1549 LPSCROLLINFO info /* [in/out] (info.fMask [in] specifies which values are to retrieve) */)
1550 {
1551 SCROLLBAR_INFO *infoPtr;
1552
1553 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1554 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1555 if ((info->cbSize != sizeof(*info)) &&
1556 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1557
1558 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page;
1559 if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal;
1560 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1561 info->nTrackPos = (SCROLL_TrackingWin == WIN_GetFullHandle(hwnd)) ? SCROLL_TrackingVal : infoPtr->CurVal;
1562 if (info->fMask & SIF_RANGE)
1563 {
1564 info->nMin = infoPtr->MinVal;
1565 info->nMax = infoPtr->MaxVal;
1566 }
1567 return (info->fMask & SIF_ALL) != 0;
1568 }
1569
1570
1571 /*************************************************************************
1572 * SetScrollPos (USER32.@)
1573 *
1574 * RETURNS
1575 * Success: Scrollbar position
1576 * Failure: 0
1577 *
1578 * REMARKS
1579 * Note the ambiguity when 0 is returned. Use GetLastError
1580 * to make sure there was an error (and to know which one).
1581 */
1582 INT WINAPI SetScrollPos(
1583 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1584 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1585 INT nPos /* [in] New value */,
1586 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */ )
1587 {
1588 SCROLLINFO info;
1589 SCROLLBAR_INFO *infoPtr;
1590 INT oldPos;
1591
1592 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1593 oldPos = infoPtr->CurVal;
1594 info.cbSize = sizeof(info);
1595 info.nPos = nPos;
1596 info.fMask = SIF_POS;
1597 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1598 return oldPos;
1599 }
1600
1601
1602 /*************************************************************************
1603 * GetScrollPos (USER32.@)
1604 *
1605 * RETURNS
1606 * Success: Current position
1607 * Failure: 0
1608 *
1609 * REMARKS
1610 * Note the ambiguity when 0 is returned. Use GetLastError
1611 * to make sure there was an error (and to know which one).
1612 */
1613 INT WINAPI GetScrollPos(
1614 HWND hwnd, /* [in] Handle of window */
1615 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1616 {
1617 SCROLLBAR_INFO *infoPtr;
1618
1619 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1620 return infoPtr->CurVal;
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(HWND hwnd, 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;
1660 vInfo.nMax = vMax;
1661 vInfo.nPos = vPos;
1662 hInfo.nMin = hMin;
1663 hInfo.nMax = hMax;
1664 hInfo.nPos = hPos;
1665 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1666
1667 SCROLL_SetScrollInfo( hwnd, SB_VERT, &vInfo, &vA );
1668 SCROLL_SetScrollInfo( hwnd, SB_HORZ, &hInfo, &hA );
1669
1670 if( !SCROLL_ShowScrollBar( hwnd, SB_BOTH,
1671 (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1672 {
1673 /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1674 if( vA & SA_SSI_REFRESH )
1675 SCROLL_RefreshScrollBar( hwnd, SB_VERT, FALSE, TRUE );
1676
1677 if( hA & SA_SSI_REFRESH )
1678 SCROLL_RefreshScrollBar( hwnd, SB_HORZ, FALSE, TRUE );
1679 }
1680 return 0;
1681 }
1682
1683
1684 /*************************************************************************
1685 * GetScrollRange (USER32.@)
1686 *
1687 * RETURNS STD
1688 */
1689 BOOL WINAPI GetScrollRange(
1690 HWND hwnd, /* [in] Handle of window */
1691 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1692 LPINT lpMin, /* [out] Where to store minimum value */
1693 LPINT lpMax /* [out] Where to store maximum value */)
1694 {
1695 SCROLLBAR_INFO *infoPtr;
1696
1697 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1698 {
1699 if (lpMin) lpMin = 0;
1700 if (lpMax) lpMax = 0;
1701 return FALSE;
1702 }
1703 if (lpMin) *lpMin = infoPtr->MinVal;
1704 if (lpMax) *lpMax = infoPtr->MaxVal;
1705 return TRUE;
1706 }
1707
1708
1709 /*************************************************************************
1710 * SCROLL_ShowScrollBar()
1711 *
1712 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1713 */
1714 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1715 BOOL fShowH, BOOL fShowV )
1716 {
1717 WND *wndPtr = WIN_FindWndPtr( hwnd );
1718 BOOL retvalue = FALSE;
1719
1720 if (!wndPtr) return FALSE;
1721 TRACE("hwnd=%04x bar=%d horz=%d, vert=%d\n",
1722 hwnd, nBar, fShowH, fShowV );
1723
1724 switch(nBar)
1725 {
1726 case SB_CTL:
1727 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1728 retvalue = TRUE;
1729 goto END;
1730
1731 case SB_BOTH:
1732 case SB_HORZ:
1733 if (fShowH)
1734 {
1735 fShowH = !(wndPtr->dwStyle & WS_HSCROLL);
1736 wndPtr->dwStyle |= WS_HSCROLL;
1737 }
1738 else /* hide it */
1739 {
1740 fShowH = (wndPtr->dwStyle & WS_HSCROLL);
1741 wndPtr->dwStyle &= ~WS_HSCROLL;
1742 }
1743 if( nBar == SB_HORZ ) {
1744 fShowV = FALSE;
1745 break;
1746 }
1747 /* fall through */
1748
1749 case SB_VERT:
1750 if (fShowV)
1751 {
1752 fShowV = !(wndPtr->dwStyle & WS_VSCROLL);
1753 wndPtr->dwStyle |= WS_VSCROLL;
1754 }
1755 else /* hide it */
1756 {
1757 fShowV = (wndPtr->dwStyle & WS_VSCROLL);
1758 wndPtr->dwStyle &= ~WS_VSCROLL;
1759 }
1760 if ( nBar == SB_VERT )
1761 fShowH = FALSE;
1762 break;
1763
1764 default:
1765 retvalue = FALSE; /* Nothing to do! */
1766 goto END;
1767 }
1768
1769 if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1770 {
1771 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1772 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1773 retvalue = TRUE;
1774 goto END;
1775 }
1776
1777 retvalue = FALSE; /* no frame changes */
1778 END:
1779 WIN_ReleaseWndPtr(wndPtr);
1780 return retvalue;
1781 }
1782
1783
1784 /*************************************************************************
1785 * ShowScrollBar (USER32.@)
1786 *
1787 * RETURNS STD
1788 */
1789 BOOL WINAPI ShowScrollBar(
1790 HWND hwnd, /* [in] Handle of window whose scrollbar(s) will be affected */
1791 INT nBar, /* [in] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1792 BOOL fShow /* [in] TRUE = show, FALSE = hide */)
1793 {
1794 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1795 (nBar == SB_HORZ) ? 0 : fShow );
1796 return TRUE;
1797 }
1798
1799
1800 /*************************************************************************
1801 * EnableScrollBar (USER32.@)
1802 */
1803 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1804 {
1805 BOOL bFineWithMe;
1806 SCROLLBAR_INFO *infoPtr;
1807
1808 TRACE("%04x %d %d\n", hwnd, nBar, flags );
1809
1810 flags &= ESB_DISABLE_BOTH;
1811
1812 if (nBar == SB_BOTH)
1813 {
1814 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE;
1815 if (!(bFineWithMe = (infoPtr->flags == flags)) )
1816 {
1817 infoPtr->flags = flags;
1818 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1819 }
1820 nBar = SB_HORZ;
1821 }
1822 else
1823 bFineWithMe = TRUE;
1824
1825 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1826 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1827 infoPtr->flags = flags;
1828
1829 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1830 return TRUE;
1831 }
Maarten's multimedia branch