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Porting fixes.
[wine/multimedia.git] / controls / scroll.c
blobc6e191d5665b55f1ec55f2f782bf92a2c831743c
1 /*
2 * Scrollbar control
3 *
4 * Copyright 1993 Martin Ayotte
5 * Copyright 1994, 1996 Alexandre Julliard
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22 #include "windef.h"
23 #include "wingdi.h"
24 #include "wine/winuser16.h"
25 #include "controls.h"
26 #include "win.h"
27 #include "wine/debug.h"
28 #include "user.h"
29 #include "message.h"
30
31 WINE_DEFAULT_DEBUG_CHANNEL(scroll);
32
33 typedef struct
34 {
35 INT curVal; /* Current scroll-bar value */
36 INT minVal; /* Minimum scroll-bar value */
37 INT maxVal; /* Maximum scroll-bar value */
38 INT page; /* Page size of scroll bar (Win32) */
39 UINT flags; /* EnableScrollBar flags */
40 } SCROLLBAR_INFO;
41
42
43 static HBITMAP hUpArrow;
44 static HBITMAP hDnArrow;
45 static HBITMAP hLfArrow;
46 static HBITMAP hRgArrow;
47 static HBITMAP hUpArrowD;
48 static HBITMAP hDnArrowD;
49 static HBITMAP hLfArrowD;
50 static HBITMAP hRgArrowD;
51 static HBITMAP hUpArrowI;
52 static HBITMAP hDnArrowI;
53 static HBITMAP hLfArrowI;
54 static HBITMAP hRgArrowI;
55
56 #define TOP_ARROW(flags,pressed) \
57 (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
58 #define BOTTOM_ARROW(flags,pressed) \
59 (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
60 #define LEFT_ARROW(flags,pressed) \
61 (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
62 #define RIGHT_ARROW(flags,pressed) \
63 (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
64
65
66 /* Minimum size of the rectangle between the arrows */
67 #define SCROLL_MIN_RECT 4
68
69 /* Minimum size of the thumb in pixels */
70 #define SCROLL_MIN_THUMB 6
71
72 /* Overlap between arrows and thumb */
73 #define SCROLL_ARROW_THUMB_OVERLAP ((TWEAK_WineLook == WIN31_LOOK) ? 1 : 0)
74
75 /* Delay (in ms) before first repetition when holding the button down */
76 #define SCROLL_FIRST_DELAY 200
77
78 /* Delay (in ms) between scroll repetitions */
79 #define SCROLL_REPEAT_DELAY 50
80
81 /* Scroll timer id */
82 #define SCROLL_TIMER 0
83
84 /* Scroll-bar hit testing */
85 enum SCROLL_HITTEST
86 {
87 SCROLL_NOWHERE, /* Outside the scroll bar */
88 SCROLL_TOP_ARROW, /* Top or left arrow */
89 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
90 SCROLL_THUMB, /* Thumb rectangle */
91 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
92 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
93 };
94
95 /* What to do after SCROLL_SetScrollInfo() */
96 #define SA_SSI_HIDE 0x0001
97 #define SA_SSI_SHOW 0x0002
98 #define SA_SSI_REFRESH 0x0004
99 #define SA_SSI_REPAINT_ARROWS 0x0008
100
101 /* Thumb-tracking info */
102 static HWND SCROLL_TrackingWin = 0;
103 static INT SCROLL_TrackingBar = 0;
104 static INT SCROLL_TrackingPos = 0;
105 static INT SCROLL_TrackingVal = 0;
106 /* Hit test code of the last button-down event */
107 static enum SCROLL_HITTEST SCROLL_trackHitTest;
108 static BOOL SCROLL_trackVertical;
109
110 /* Is the moving thumb being displayed? */
111 static BOOL SCROLL_MovingThumb = FALSE;
112
113 /* Local functions */
114 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
115 BOOL fShowH, BOOL fShowV );
116 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
117 const SCROLLINFO *info, INT *action );
118 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
119 RECT *rect, INT arrowSize,
120 INT thumbSize, INT thumbPos,
121 UINT flags, BOOL vertical,
122 BOOL top_selected, BOOL bottom_selected );
123 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
124
125
126 /*********************************************************************
127 * scrollbar class descriptor
128 */
129 const struct builtin_class_descr SCROLL_builtin_class =
130 {
131 "ScrollBar", /* name */
132 CS_GLOBALCLASS | CS_DBLCLKS | CS_VREDRAW | CS_HREDRAW | CS_PARENTDC, /* style */
133 NULL, /* procA (winproc is Unicode only) */
134 ScrollBarWndProc, /* procW */
135 sizeof(SCROLLBAR_INFO), /* extra */
136 IDC_ARROWA, /* cursor */
137 0 /* brush */
138 };
139
140
141 /***********************************************************************
142 * SCROLL_LoadBitmaps
143 */
144 static void SCROLL_LoadBitmaps(void)
145 {
146 hUpArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
147 hDnArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
148 hLfArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
149 hRgArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
150 hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
151 hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
152 hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
153 hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
154 hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
155 hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
156 hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
157 hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
158 }
159
160
161 /***********************************************************************
162 * SCROLL_GetScrollInfo
163 */
164 static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND hwnd, INT nBar )
165 {
166 SCROLLBAR_INFO *infoPtr;
167 WND *wndPtr = WIN_FindWndPtr( hwnd );
168
169 if (!wndPtr) return NULL;
170 switch(nBar)
171 {
172 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
173 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
174 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
175 default:
176 WIN_ReleaseWndPtr( wndPtr );
177 return NULL;
178 }
179
180 if (!infoPtr) /* Create the info structure if needed */
181 {
182 if ((infoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(SCROLLBAR_INFO) )))
183 {
184 infoPtr->minVal = infoPtr->curVal = infoPtr->page = 0;
185 infoPtr->maxVal = 100;
186 infoPtr->flags = ESB_ENABLE_BOTH;
187 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
188 else wndPtr->pVScroll = infoPtr;
189 }
190 if (!hUpArrow) SCROLL_LoadBitmaps();
191 }
192 WIN_ReleaseWndPtr( wndPtr );
193 return infoPtr;
194 }
195
196
197 /***********************************************************************
198 * SCROLL_GetScrollBarRect
199 *
200 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
201 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
202 * 'arrowSize' returns the width or height of an arrow (depending on
203 * the orientation of the scrollbar), 'thumbSize' returns the size of
204 * the thumb, and 'thumbPos' returns the position of the thumb
205 * relative to the left or to the top.
206 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
207 */
208 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
209 INT *arrowSize, INT *thumbSize,
210 INT *thumbPos )
211 {
212 INT pixels;
213 BOOL vertical;
214 WND *wndPtr = WIN_FindWndPtr( hwnd );
215
216 switch(nBar)
217 {
218 case SB_HORZ:
219 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
220 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
221 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
222 lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
223 if(wndPtr->dwStyle & WS_BORDER) {
224 lprect->left--;
225 lprect->right++;
226 } else if(wndPtr->dwStyle & WS_VSCROLL)
227 lprect->right++;
228 vertical = FALSE;
229 break;
230
231 case SB_VERT:
232 if((wndPtr->dwExStyle & WS_EX_LEFTSCROLLBAR) != 0)
233 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left - GetSystemMetrics(SM_CXVSCROLL);
234 else
235 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
236 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
237 lprect->right = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
238 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
239 if(wndPtr->dwStyle & WS_BORDER) {
240 lprect->top--;
241 lprect->bottom++;
242 } else if(wndPtr->dwStyle & WS_HSCROLL)
243 lprect->bottom++;
244 vertical = TRUE;
245 break;
246
247 case SB_CTL:
248 GetClientRect( hwnd, lprect );
249 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
250 break;
251
252 default:
253 WIN_ReleaseWndPtr(wndPtr);
254 return FALSE;
255 }
256
257 if (vertical) pixels = lprect->bottom - lprect->top;
258 else pixels = lprect->right - lprect->left;
259
260 if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
261 {
262 if (pixels > SCROLL_MIN_RECT)
263 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
264 else
265 *arrowSize = 0;
266 *thumbPos = *thumbSize = 0;
267 }
268 else
269 {
270 SCROLLBAR_INFO *info = SCROLL_GetScrollInfo( hwnd, nBar );
271
272 *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
273 pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
274
275 if (info->page)
276 {
277 *thumbSize = MulDiv(pixels,info->page,(info->maxVal-info->minVal+1));
278 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
279 }
280 else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
281
282 if (((pixels -= *thumbSize ) < 0) ||
283 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
284 {
285 /* Rectangle too small or scrollbar disabled -> no thumb */
286 *thumbPos = *thumbSize = 0;
287 }
288 else
289 {
290 INT max = info->maxVal - max( info->page-1, 0 );
291 if (info->minVal >= max)
292 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
293 else
294 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
295 + MulDiv(pixels, (info->curVal-info->minVal),(max - info->minVal));
296 }
297 }
298 WIN_ReleaseWndPtr(wndPtr);
299 return vertical;
300 }
301
302
303 /***********************************************************************
304 * SCROLL_GetThumbVal
305 *
306 * Compute the current scroll position based on the thumb position in pixels
307 * from the top of the scroll-bar.
308 */
309 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
310 BOOL vertical, INT pos )
311 {
312 INT thumbSize;
313 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
314
315 if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
316 return infoPtr->minVal;
317
318 if (infoPtr->page)
319 {
320 thumbSize = MulDiv(pixels,infoPtr->page,(infoPtr->maxVal-infoPtr->minVal+1));
321 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
322 }
323 else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
324
325 if ((pixels -= thumbSize) <= 0) return infoPtr->minVal;
326
327 pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
328 if (pos > pixels) pos = pixels;
329
330 if (!infoPtr->page) pos *= infoPtr->maxVal - infoPtr->minVal;
331 else pos *= infoPtr->maxVal - infoPtr->minVal - infoPtr->page + 1;
332 return infoPtr->minVal + ((pos + pixels / 2) / pixels);
333 }
334
335 /***********************************************************************
336 * SCROLL_PtInRectEx
337 */
338 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
339 {
340 RECT rect = *lpRect;
341
342 if (vertical)
343 {
344 rect.left -= lpRect->right - lpRect->left;
345 rect.right += lpRect->right - lpRect->left;
346 }
347 else
348 {
349 rect.top -= lpRect->bottom - lpRect->top;
350 rect.bottom += lpRect->bottom - lpRect->top;
351 }
352 return PtInRect( &rect, pt );
353 }
354
355 /***********************************************************************
356 * SCROLL_ClipPos
357 */
358 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
359 {
360 if( pt.x < lpRect->left )
361 pt.x = lpRect->left;
362 else
363 if( pt.x > lpRect->right )
364 pt.x = lpRect->right;
365
366 if( pt.y < lpRect->top )
367 pt.y = lpRect->top;
368 else
369 if( pt.y > lpRect->bottom )
370 pt.y = lpRect->bottom;
371
372 return pt;
373 }
374
375
376 /***********************************************************************
377 * SCROLL_HitTest
378 *
379 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
380 */
381 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
382 POINT pt, BOOL bDragging )
383 {
384 INT arrowSize, thumbSize, thumbPos;
385 RECT rect;
386
387 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
388 &arrowSize, &thumbSize, &thumbPos );
389
390 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
391 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
392
393 if (vertical)
394 {
395 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
396 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
397 if (!thumbPos) return SCROLL_TOP_RECT;
398 pt.y -= rect.top;
399 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
400 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
401 }
402 else /* horizontal */
403 {
404 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
405 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
406 if (!thumbPos) return SCROLL_TOP_RECT;
407 pt.x -= rect.left;
408 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
409 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
410 }
411 return SCROLL_THUMB;
412 }
413
414
415 /***********************************************************************
416 * SCROLL_DrawArrows
417 *
418 * Draw the scroll bar arrows.
419 */
420 static void SCROLL_DrawArrows_9x( HDC hdc, SCROLLBAR_INFO *infoPtr,
421 RECT *rect, INT arrowSize, BOOL vertical,
422 BOOL top_pressed, BOOL bottom_pressed )
423 {
424 RECT r;
425
426 r = *rect;
427 if( vertical )
428 r.bottom = r.top + arrowSize;
429 else
430 r.right = r.left + arrowSize;
431
432 DrawFrameControl( hdc, &r, DFC_SCROLL,
433 (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
434 | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
435 | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
436
437 r = *rect;
438 if( vertical )
439 r.top = r.bottom-arrowSize;
440 else
441 r.left = r.right-arrowSize;
442
443 DrawFrameControl( hdc, &r, DFC_SCROLL,
444 (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
445 | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
446 | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
447 }
448
449 static void SCROLL_DrawArrows_31( HDC hdc, SCROLLBAR_INFO *infoPtr,
450 RECT *rect, INT arrowSize, BOOL vertical,
451 BOOL top_pressed, BOOL bottom_pressed )
452 {
453 HDC hdcMem = CreateCompatibleDC( hdc );
454 HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
455 TOP_ARROW(infoPtr->flags, top_pressed)
456 : LEFT_ARROW(infoPtr->flags, top_pressed));
457
458 SetStretchBltMode( hdc, STRETCH_DELETESCANS );
459 StretchBlt( hdc, rect->left, rect->top,
460 vertical ? rect->right-rect->left : arrowSize,
461 vertical ? arrowSize : rect->bottom-rect->top,
462 hdcMem, 0, 0,
463 GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
464 SRCCOPY );
465
466 SelectObject( hdcMem, vertical ?
467 BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
468 : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
469 if (vertical)
470 StretchBlt( hdc, rect->left, rect->bottom - arrowSize,
471 rect->right - rect->left, arrowSize,
472 hdcMem, 0, 0,
473 GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
474 SRCCOPY );
475 else
476 StretchBlt( hdc, rect->right - arrowSize, rect->top,
477 arrowSize, rect->bottom - rect->top,
478 hdcMem, 0, 0,
479 GetSystemMetrics(SM_CXVSCROLL), GetSystemMetrics(SM_CYHSCROLL),
480 SRCCOPY );
481 SelectObject( hdcMem, hbmpPrev );
482 DeleteDC( hdcMem );
483 }
484
485 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
486 RECT *rect, INT arrowSize, BOOL vertical,
487 BOOL top_pressed, BOOL bottom_pressed )
488 {
489 if( TWEAK_WineLook == WIN31_LOOK )
490 SCROLL_DrawArrows_31( hdc, infoPtr, rect, arrowSize,
491 vertical, top_pressed,bottom_pressed );
492 else
493 SCROLL_DrawArrows_9x( hdc, infoPtr, rect, arrowSize,
494 vertical, top_pressed,bottom_pressed );
495 }
496
497
498 /***********************************************************************
499 * SCROLL_DrawMovingThumb
500 *
501 * Draw the moving thumb rectangle.
502 */
503 static void SCROLL_DrawMovingThumb_31( HDC hdc, RECT *rect, BOOL vertical,
504 INT arrowSize, INT thumbSize )
505 {
506 RECT r = *rect;
507 if (vertical)
508 {
509 r.top += SCROLL_TrackingPos;
510 if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
511 r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
512 if (r.top + thumbSize >
513 rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
514 r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
515 - thumbSize;
516 r.bottom = r.top + thumbSize;
517 }
518 else
519 {
520 r.left += SCROLL_TrackingPos;
521 if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
522 r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
523 if (r.left + thumbSize >
524 rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
525 r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
526 - thumbSize;
527 r.right = r.left + thumbSize;
528 }
529
530 DrawFocusRect( hdc, &r );
531 SCROLL_MovingThumb = !SCROLL_MovingThumb;
532 }
533
534 static void SCROLL_DrawMovingThumb_9x( HDC hdc, RECT *rect, BOOL vertical,
535 INT arrowSize, INT thumbSize )
536 {
537 INT pos = SCROLL_TrackingPos;
538 INT max_size;
539
540 if( vertical )
541 max_size = rect->bottom - rect->top;
542 else
543 max_size = rect->right - rect->left;
544
545 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
546
547 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
548 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
549 else if( pos > max_size )
550 pos = max_size;
551
552 SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
553 rect, arrowSize, thumbSize, pos,
554 0, vertical, FALSE, FALSE );
555
556 SCROLL_MovingThumb = !SCROLL_MovingThumb;
557 }
558
559 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
560 INT arrowSize, INT thumbSize )
561 {
562 if( TWEAK_WineLook == WIN31_LOOK )
563 SCROLL_DrawMovingThumb_31( hdc, rect, vertical, arrowSize, thumbSize );
564 else
565 SCROLL_DrawMovingThumb_9x( hdc, rect, vertical, arrowSize, thumbSize );
566 }
567
568 /***********************************************************************
569 * SCROLL_DrawInterior
570 *
571 * Draw the scroll bar interior (everything except the arrows).
572 */
573 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
574 RECT *rect, INT arrowSize,
575 INT thumbSize, INT thumbPos,
576 UINT flags, BOOL vertical,
577 BOOL top_selected, BOOL bottom_selected )
578 {
579 RECT r;
580 HPEN hSavePen;
581 HBRUSH hSaveBrush,hBrush;
582
583 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
584 * The window-owned scrollbars need to call DEFWND_ControlColor
585 * to correctly setup default scrollbar colors
586 */
587 if (nBar == SB_CTL)
588 {
589 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
590 (WPARAM)hdc,(LPARAM)hwnd);
591 }
592 else
593 {
594 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
595 }
596
597 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
598 hSaveBrush = SelectObject( hdc, hBrush );
599
600 /* Calculate the scroll rectangle */
601 r = *rect;
602 if (vertical)
603 {
604 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
605 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
606 }
607 else
608 {
609 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
610 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
611 }
612
613 /* Draw the scroll rectangles and thumb */
614 if (!thumbPos) /* No thumb to draw */
615 {
616 PatBlt( hdc, r.left, r.top,
617 r.right - r.left, r.bottom - r.top,
618 PATCOPY );
619
620 /* cleanup and return */
621 SelectObject( hdc, hSavePen );
622 SelectObject( hdc, hSaveBrush );
623 return;
624 }
625
626 if (vertical)
627 {
628 PatBlt( hdc, r.left, r.top,
629 r.right - r.left,
630 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
631 top_selected ? 0x0f0000 : PATCOPY );
632 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
633 PatBlt( hdc, r.left, r.top + thumbSize,
634 r.right - r.left,
635 r.bottom - r.top - thumbSize,
636 bottom_selected ? 0x0f0000 : PATCOPY );
637 r.bottom = r.top + thumbSize;
638 }
639 else /* horizontal */
640 {
641 PatBlt( hdc, r.left, r.top,
642 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
643 r.bottom - r.top,
644 top_selected ? 0x0f0000 : PATCOPY );
645 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
646 PatBlt( hdc, r.left + thumbSize, r.top,
647 r.right - r.left - thumbSize,
648 r.bottom - r.top,
649 bottom_selected ? 0x0f0000 : PATCOPY );
650 r.right = r.left + thumbSize;
651 }
652
653 /* Draw the thumb */
654 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
655
656 /* cleanup */
657 SelectObject( hdc, hSavePen );
658 SelectObject( hdc, hSaveBrush );
659 }
660
661
662 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
663 RECT *rect, INT arrowSize,
664 INT thumbSize, INT thumbPos,
665 UINT flags, BOOL vertical,
666 BOOL top_selected, BOOL bottom_selected )
667 {
668 RECT r;
669 HPEN hSavePen;
670 HBRUSH hSaveBrush,hBrush;
671 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
672
673 if (Save_SCROLL_MovingThumb &&
674 (SCROLL_TrackingWin == hwnd) &&
675 (SCROLL_TrackingBar == nBar))
676 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
677
678 /* Select the correct brush and pen */
679
680 if (TWEAK_WineLook == WIN31_LOOK && (flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
681 {
682 /* This ought to be the color of the parent window */
683 hBrush = GetSysColorBrush(COLOR_WINDOW);
684 }
685 else
686 {
687 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
688 * The window-owned scrollbars need to call DEFWND_ControlColor
689 * to correctly setup default scrollbar colors
690 */
691 if (nBar == SB_CTL) {
692 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
693 (WPARAM)hdc,(LPARAM)hwnd);
694 } else {
695 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
696 }
697 }
698 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
699 hSaveBrush = SelectObject( hdc, hBrush );
700
701 /* Calculate the scroll rectangle */
702
703 r = *rect;
704 if (vertical)
705 {
706 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
707 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
708 }
709 else
710 {
711 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
712 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
713 }
714
715 /* Draw the scroll bar frame */
716
717 /* Only draw outline if Win 3.1. Mar 24, 1999 - Ronald B. Cemer */
718 if (TWEAK_WineLook == WIN31_LOOK)
719 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
720
721 /* Draw the scroll rectangles and thumb */
722
723 if (!thumbPos) /* No thumb to draw */
724 {
725 INT offset = (TWEAK_WineLook > WIN31_LOOK) ? 0 : 1;
726
727 PatBlt( hdc, r.left+offset, r.top+offset,
728 r.right - r.left - 2*offset, r.bottom - r.top - 2*offset,
729 PATCOPY );
730
731 /* cleanup and return */
732 SelectObject( hdc, hSavePen );
733 SelectObject( hdc, hSaveBrush );
734 return;
735 }
736
737 if (vertical)
738 {
739 INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
740
741 PatBlt( hdc, r.left + offset, r.top + offset,
742 r.right - r.left - offset*2,
743 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - offset,
744 top_selected ? 0x0f0000 : PATCOPY );
745 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
746 PatBlt( hdc, r.left + offset, r.top + thumbSize,
747 r.right - r.left - offset*2,
748 r.bottom - r.top - thumbSize - offset,
749 bottom_selected ? 0x0f0000 : PATCOPY );
750 r.bottom = r.top + thumbSize;
751 }
752 else /* horizontal */
753 {
754 INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
755
756 PatBlt( hdc, r.left + offset, r.top + offset,
757 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
758 r.bottom - r.top - offset*2,
759 top_selected ? 0x0f0000 : PATCOPY );
760 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
761 PatBlt( hdc, r.left + thumbSize, r.top + offset,
762 r.right - r.left - thumbSize - offset,
763 r.bottom - r.top - offset*2,
764 bottom_selected ? 0x0f0000 : PATCOPY );
765 r.right = r.left + thumbSize;
766 }
767
768 /* Draw the thumb */
769
770 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
771 if (TWEAK_WineLook == WIN31_LOOK)
772 {
773 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
774 r.top++, r.left++;
775 }
776 else
777 {
778 Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
779 }
780 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
781
782 if (Save_SCROLL_MovingThumb &&
783 (SCROLL_TrackingWin == hwnd) &&
784 (SCROLL_TrackingBar == nBar))
785 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
786
787 /* cleanup */
788 SelectObject( hdc, hSavePen );
789 SelectObject( hdc, hSaveBrush );
790 }
791
792
793 /***********************************************************************
794 * SCROLL_DrawScrollBar
795 *
796 * Redraw the whole scrollbar.
797 */
798 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
799 BOOL arrows, BOOL interior )
800 {
801 INT arrowSize, thumbSize, thumbPos;
802 RECT rect;
803 BOOL vertical;
804 WND *wndPtr = WIN_FindWndPtr( hwnd );
805 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
806 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
807
808 if (!wndPtr || !infoPtr ||
809 ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
810 ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
811 if (!WIN_IsWindowDrawable( hwnd, FALSE )) goto END;
812 hwnd = wndPtr->hwndSelf; /* make it a full handle */
813
814 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
815 &arrowSize, &thumbSize, &thumbPos );
816
817 /* do not draw if the scrollbar rectangle is empty */
818 if(IsRectEmpty(&rect))
819 goto END;
820
821 if (Save_SCROLL_MovingThumb &&
822 (SCROLL_TrackingWin == hwnd) &&
823 (SCROLL_TrackingBar == nBar))
824 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
825
826 /* Draw the arrows */
827
828 if (arrows && arrowSize)
829 {
830 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
831 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
832 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
833 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
834 else
835 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
836 FALSE, FALSE );
837 }
838 if( interior )
839 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
840 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
841
842 if (Save_SCROLL_MovingThumb &&
843 (SCROLL_TrackingWin == hwnd) &&
844 (SCROLL_TrackingBar == nBar))
845 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
846
847 /* if scroll bar has focus, reposition the caret */
848 if(hwnd==GetFocus() && (nBar==SB_CTL))
849 {
850 if (!vertical)
851 {
852 SetCaretPos(thumbPos+1, rect.top+1);
853 }
854 else
855 {
856 SetCaretPos(rect.top+1, thumbPos+1);
857 }
858 }
859
860 END:
861 WIN_ReleaseWndPtr(wndPtr);
862 }
863
864
865 /***********************************************************************
866 * SCROLL_RefreshScrollBar
867 *
868 * Repaint the scroll bar interior after a SetScrollRange() or
869 * SetScrollPos() call.
870 */
871 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
872 BOOL arrows, BOOL interior )
873 {
874 HDC hdc = GetDCEx( hwnd, 0,
875 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
876 if (!hdc) return;
877
878 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
879 ReleaseDC( hwnd, hdc );
880 }
881
882
883 /***********************************************************************
884 * SCROLL_HandleKbdEvent
885 *
886 * Handle a keyboard event (only for SB_CTL scrollbars).
887 */
888 static void SCROLL_HandleKbdEvent( HWND hwnd, WPARAM wParam )
889 {
890 WPARAM msg;
891
892 switch(wParam)
893 {
894 case VK_PRIOR: msg = SB_PAGEUP; break;
895 case VK_NEXT: msg = SB_PAGEDOWN; break;
896 case VK_HOME: msg = SB_TOP; break;
897 case VK_END: msg = SB_BOTTOM; break;
898 case VK_UP: msg = SB_LINEUP; break;
899 case VK_DOWN: msg = SB_LINEDOWN; break;
900 default: return;
901 }
902 SendMessageW( GetParent(hwnd),
903 (GetWindowLongA( hwnd, GWL_STYLE ) & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
904 msg, (LPARAM)hwnd );
905 }
906
907
908 /***********************************************************************
909 * SCROLL_HandleScrollEvent
910 *
911 * Handle a mouse or timer event for the scrollbar.
912 * 'pt' is the location of the mouse event in client (for SB_CTL) or
913 * windows coordinates.
914 */
915 static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
916 {
917 /* Previous mouse position for timer events */
918 static POINT prevPt;
919 /* Thumb position when tracking started. */
920 static UINT trackThumbPos;
921 /* Position in the scroll-bar of the last button-down event. */
922 static INT lastClickPos;
923 /* Position in the scroll-bar of the last mouse event. */
924 static INT lastMousePos;
925
926 enum SCROLL_HITTEST hittest;
927 HWND hwndOwner, hwndCtl;
928 BOOL vertical;
929 INT arrowSize, thumbSize, thumbPos;
930 RECT rect;
931 HDC hdc;
932
933 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
934 if (!infoPtr) return;
935 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
936 return;
937
938 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
939 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
940 &arrowSize, &thumbSize, &thumbPos );
941 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
942 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
943
944 switch(msg)
945 {
946 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
947 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
948 SCROLL_trackVertical = vertical;
949 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
950 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
951 lastMousePos = lastClickPos;
952 trackThumbPos = thumbPos;
953 prevPt = pt;
954 if (nBar == SB_CTL && (GetWindowLongA(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
955 SetCapture( hwnd );
956 break;
957
958 case WM_MOUSEMOVE:
959 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
960 prevPt = pt;
961 break;
962
963 case WM_LBUTTONUP:
964 hittest = SCROLL_NOWHERE;
965 ReleaseCapture();
966 /* if scrollbar has focus, show back caret */
967 if (hwnd==GetFocus()) ShowCaret(hwnd);
968 break;
969
970 case WM_SYSTIMER:
971 pt = prevPt;
972 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
973 break;
974
975 default:
976 return; /* Should never happen */
977 }
978
979 TRACE("Event: hwnd=%p bar=%d msg=%s pt=%ld,%ld hit=%d\n",
980 hwnd, nBar, SPY_GetMsgName(msg,hwnd), pt.x, pt.y, hittest );
981
982 switch(SCROLL_trackHitTest)
983 {
984 case SCROLL_NOWHERE: /* No tracking in progress */
985 break;
986
987 case SCROLL_TOP_ARROW:
988 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
989 (hittest == SCROLL_trackHitTest), FALSE );
990 if (hittest == SCROLL_trackHitTest)
991 {
992 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
993 {
994 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
995 SB_LINEUP, (LPARAM)hwndCtl );
996 }
997
998 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
999 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1000 (TIMERPROC)0 );
1001 }
1002 else KillSystemTimer( hwnd, SCROLL_TIMER );
1003 break;
1004
1005 case SCROLL_TOP_RECT:
1006 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1007 thumbPos, infoPtr->flags, vertical,
1008 (hittest == SCROLL_trackHitTest), FALSE );
1009 if (hittest == SCROLL_trackHitTest)
1010 {
1011 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1012 {
1013 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1014 SB_PAGEUP, (LPARAM)hwndCtl );
1015 }
1016 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1017 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1018 (TIMERPROC)0 );
1019 }
1020 else KillSystemTimer( hwnd, SCROLL_TIMER );
1021 break;
1022
1023 case SCROLL_THUMB:
1024 if (msg == WM_LBUTTONDOWN)
1025 {
1026 SCROLL_TrackingWin = hwnd;
1027 SCROLL_TrackingBar = nBar;
1028 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
1029 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1030 vertical,
1031 SCROLL_TrackingPos );
1032 if (!SCROLL_MovingThumb)
1033 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1034 }
1035 else if (msg == WM_LBUTTONUP)
1036 {
1037 if (SCROLL_MovingThumb)
1038 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1039 SCROLL_TrackingWin = 0;
1040 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1041 thumbPos, infoPtr->flags, vertical,
1042 FALSE, FALSE );
1043 }
1044 else /* WM_MOUSEMOVE */
1045 {
1046 UINT pos;
1047
1048 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
1049 else
1050 {
1051 pt = SCROLL_ClipPos( &rect, pt );
1052 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
1053 }
1054 if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
1055 {
1056 if (SCROLL_MovingThumb)
1057 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1058 arrowSize, thumbSize );
1059 lastMousePos = pos;
1060 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
1061 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1062 vertical,
1063 SCROLL_TrackingPos );
1064 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1065 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1066 (LPARAM)hwndCtl );
1067 if (!SCROLL_MovingThumb)
1068 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1069 arrowSize, thumbSize );
1070 }
1071 }
1072 break;
1073
1074 case SCROLL_BOTTOM_RECT:
1075 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1076 thumbPos, infoPtr->flags, vertical,
1077 FALSE, (hittest == SCROLL_trackHitTest) );
1078 if (hittest == SCROLL_trackHitTest)
1079 {
1080 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1081 {
1082 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1083 SB_PAGEDOWN, (LPARAM)hwndCtl );
1084 }
1085 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1086 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1087 (TIMERPROC)0 );
1088 }
1089 else KillSystemTimer( hwnd, SCROLL_TIMER );
1090 break;
1091
1092 case SCROLL_BOTTOM_ARROW:
1093 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1094 FALSE, (hittest == SCROLL_trackHitTest) );
1095 if (hittest == SCROLL_trackHitTest)
1096 {
1097 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1098 {
1099 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1100 SB_LINEDOWN, (LPARAM)hwndCtl );
1101 }
1102
1103 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1104 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1105 (TIMERPROC)0 );
1106 }
1107 else KillSystemTimer( hwnd, SCROLL_TIMER );
1108 break;
1109 }
1110
1111 if (msg == WM_LBUTTONDOWN)
1112 {
1113
1114 if (hittest == SCROLL_THUMB)
1115 {
1116 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1117 trackThumbPos + lastMousePos - lastClickPos );
1118 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1119 MAKEWPARAM( SB_THUMBTRACK, val ), (LPARAM)hwndCtl );
1120 }
1121 }
1122
1123 if (msg == WM_LBUTTONUP)
1124 {
1125 hittest = SCROLL_trackHitTest;
1126 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1127
1128 if (hittest == SCROLL_THUMB)
1129 {
1130 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1131 trackThumbPos + lastMousePos - lastClickPos );
1132 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1133 MAKEWPARAM( SB_THUMBPOSITION, val ), (LPARAM)hwndCtl );
1134 }
1135 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1136 SB_ENDSCROLL, (LPARAM)hwndCtl );
1137 }
1138
1139 ReleaseDC( hwnd, hdc );
1140 }
1141
1142
1143 /***********************************************************************
1144 * SCROLL_TrackScrollBar
1145 *
1146 * Track a mouse button press on a scroll-bar.
1147 * pt is in screen-coordinates for non-client scroll bars.
1148 */
1149 void SCROLL_TrackScrollBar( HWND hwnd, INT scrollbar, POINT pt )
1150 {
1151 MSG msg;
1152 INT xoffset = 0, yoffset = 0;
1153
1154 if (scrollbar != SB_CTL)
1155 {
1156 WND *wndPtr = WIN_GetPtr( hwnd );
1157 if (!wndPtr || wndPtr == WND_OTHER_PROCESS) return;
1158 xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
1159 yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
1160 WIN_ReleasePtr( wndPtr );
1161 ScreenToClient( hwnd, &pt );
1162 pt.x += xoffset;
1163 pt.y += yoffset;
1164 }
1165
1166 SCROLL_HandleScrollEvent( hwnd, scrollbar, WM_LBUTTONDOWN, pt );
1167
1168 do
1169 {
1170 if (!GetMessageW( &msg, 0, 0, 0 )) break;
1171 if (CallMsgFilterW( &msg, MSGF_SCROLLBAR )) continue;
1172 switch(msg.message)
1173 {
1174 case WM_LBUTTONUP:
1175 case WM_MOUSEMOVE:
1176 case WM_SYSTIMER:
1177 pt.x = LOWORD(msg.lParam) + xoffset;
1178 pt.y = HIWORD(msg.lParam) + yoffset;
1179 SCROLL_HandleScrollEvent( hwnd, scrollbar, msg.message, pt );
1180 break;
1181 default:
1182 TranslateMessage( &msg );
1183 DispatchMessageW( &msg );
1184 break;
1185 }
1186 if (!IsWindow( hwnd ))
1187 {
1188 ReleaseCapture();
1189 break;
1190 }
1191 } while (msg.message != WM_LBUTTONUP);
1192 }
1193
1194
1195 /***********************************************************************
1196 * ScrollBarWndProc
1197 */
1198 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1199 {
1200 if (!IsWindow( hwnd )) return 0;
1201
1202 switch(message)
1203 {
1204 case WM_CREATE:
1205 {
1206 SCROLLBAR_INFO *infoPtr;
1207 CREATESTRUCTW *lpCreat = (CREATESTRUCTW *)lParam;
1208
1209 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_CTL ))) return -1;
1210 if (lpCreat->style & WS_DISABLED)
1211 {
1212 TRACE("Created WS_DISABLED scrollbar\n");
1213 infoPtr->flags = ESB_DISABLE_BOTH;
1214 }
1215
1216 if (lpCreat->style & SBS_VERT)
1217 {
1218 if (lpCreat->style & SBS_LEFTALIGN)
1219 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1220 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1221 else if (lpCreat->style & SBS_RIGHTALIGN)
1222 MoveWindow( hwnd,
1223 lpCreat->x+lpCreat->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1224 lpCreat->y,
1225 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1226 }
1227 else /* SBS_HORZ */
1228 {
1229 if (lpCreat->style & SBS_TOPALIGN)
1230 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1231 lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1232 else if (lpCreat->style & SBS_BOTTOMALIGN)
1233 MoveWindow( hwnd,
1234 lpCreat->x,
1235 lpCreat->y+lpCreat->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1236 lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1237 }
1238 }
1239 if (!hUpArrow) SCROLL_LoadBitmaps();
1240 TRACE("ScrollBar creation, hwnd=%p\n", hwnd );
1241 return 0;
1242
1243 case WM_ENABLE:
1244 {
1245 SCROLLBAR_INFO *infoPtr;
1246 if ((infoPtr = SCROLL_GetScrollInfo( hwnd, SB_CTL )))
1247 {
1248 infoPtr->flags = wParam ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH;
1249 SCROLL_RefreshScrollBar(hwnd, SB_CTL, TRUE, TRUE);
1250 }
1251 }
1252 return 0;
1253
1254 case WM_LBUTTONDOWN:
1255 {
1256 POINT pt;
1257 pt.x = SLOWORD(lParam);
1258 pt.y = SHIWORD(lParam);
1259 SCROLL_TrackScrollBar( hwnd, SB_CTL, pt );
1260 }
1261 break;
1262 case WM_LBUTTONUP:
1263 case WM_MOUSEMOVE:
1264 case WM_SYSTIMER:
1265 {
1266 POINT pt;
1267 pt.x = SLOWORD(lParam);
1268 pt.y = SHIWORD(lParam);
1269 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1270 }
1271 break;
1272
1273 /* if key event is received, the scrollbar has the focus */
1274 case WM_KEYDOWN:
1275 /* hide caret on first KEYDOWN to prevent flicker */
1276 if ((lParam & 0x40000000)==0)
1277 HideCaret(hwnd);
1278 SCROLL_HandleKbdEvent( hwnd, wParam );
1279 break;
1280
1281 case WM_KEYUP:
1282 ShowCaret(hwnd);
1283 break;
1284
1285 case WM_SETFOCUS:
1286 {
1287 /* Create a caret when a ScrollBar get focus */
1288 RECT rect;
1289 int arrowSize, thumbSize, thumbPos, vertical;
1290 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1291 &arrowSize, &thumbSize, &thumbPos );
1292 if (!vertical)
1293 {
1294 CreateCaret(hwnd, (HBITMAP)1, thumbSize-2, rect.bottom-rect.top-2);
1295 SetCaretPos(thumbPos+1, rect.top+1);
1296 }
1297 else
1298 {
1299 CreateCaret(hwnd, (HBITMAP)1, rect.right-rect.left-2,thumbSize-2);
1300 SetCaretPos(rect.top+1, thumbPos+1);
1301 }
1302 ShowCaret(hwnd);
1303 }
1304 break;
1305
1306 case WM_KILLFOCUS:
1307 {
1308 RECT rect;
1309 int arrowSize, thumbSize, thumbPos, vertical;
1310 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1311 if (!vertical){
1312 rect.left=thumbPos+1;
1313 rect.right=rect.left+thumbSize;
1314 }
1315 else
1316 {
1317 rect.top=thumbPos+1;
1318 rect.bottom=rect.top+thumbSize;
1319 }
1320 HideCaret(hwnd);
1321 InvalidateRect(hwnd,&rect,0);
1322 DestroyCaret();
1323 }
1324 break;
1325
1326 case WM_ERASEBKGND:
1327 return 1;
1328
1329 case WM_GETDLGCODE:
1330 return DLGC_WANTARROWS; /* Windows returns this value */
1331
1332 case WM_PAINT:
1333 {
1334 PAINTSTRUCT ps;
1335 HDC hdc = BeginPaint( hwnd, &ps );
1336 if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEBOX)
1337 FillRect( hdc, &ps.rcPaint, GetSysColorBrush(COLOR_SCROLLBAR) );
1338 else
1339 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1340 EndPaint( hwnd, &ps );
1341 }
1342 break;
1343
1344 case SBM_SETPOS16:
1345 case SBM_SETPOS:
1346 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1347
1348 case SBM_GETPOS16:
1349 case SBM_GETPOS:
1350 return GetScrollPos( hwnd, SB_CTL );
1351
1352 case SBM_SETRANGE16:
1353 SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
1354 wParam /* FIXME: Is this correct? */ );
1355 return 0;
1356
1357 case SBM_SETRANGE:
1358 {
1359 INT oldPos = GetScrollPos( hwnd, SB_CTL );
1360 SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
1361 if (oldPos != GetScrollPos( hwnd, SB_CTL )) return oldPos;
1362 }
1363 return 0;
1364
1365 case SBM_GETRANGE16:
1366 FIXME("don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
1367 return 0;
1368
1369 case SBM_GETRANGE:
1370 GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
1371 return 0;
1372
1373 case SBM_ENABLE_ARROWS16:
1374 case SBM_ENABLE_ARROWS:
1375 return EnableScrollBar( hwnd, SB_CTL, wParam );
1376
1377 case SBM_SETRANGEREDRAW:
1378 {
1379 INT oldPos = GetScrollPos( hwnd, SB_CTL );
1380 SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
1381 if (oldPos != GetScrollPos( hwnd, SB_CTL )) return oldPos;
1382 }
1383 return 0;
1384
1385 case SBM_SETSCROLLINFO:
1386 return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1387
1388 case SBM_GETSCROLLINFO:
1389 return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
1390
1391 case 0x00e5:
1392 case 0x00e7:
1393 case 0x00e8:
1394 case 0x00eb:
1395 case 0x00ec:
1396 case 0x00ed:
1397 case 0x00ee:
1398 case 0x00ef:
1399 ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1400 message, wParam, lParam );
1401 break;
1402
1403 default:
1404 if (message >= WM_USER)
1405 WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1406 message, wParam, lParam );
1407 return DefWindowProcW( hwnd, message, wParam, lParam );
1408 }
1409 return 0;
1410 }
1411
1412
1413 /*************************************************************************
1414 * SetScrollInfo (USER32.@)
1415 * SetScrollInfo can be used to set the position, upper bound,
1416 * lower bound, and page size of a scrollbar control.
1417 *
1418 * RETURNS
1419 * Scrollbar position
1420 *
1421 * NOTE
1422 * For 100 lines of text to be displayed in a window of 25 lines,
1423 * one would for instance use info->nMin=0, info->nMax=75
1424 * (corresponding to the 76 different positions of the window on
1425 * the text), and info->nPage=25.
1426 */
1427 INT WINAPI SetScrollInfo(
1428 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1429 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1430 const SCROLLINFO *info /* [in] Specifies what to change and new values */,
1431 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1432 {
1433 INT action;
1434 INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1435
1436 if( action & SA_SSI_HIDE )
1437 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1438 else
1439 {
1440 if( action & SA_SSI_SHOW )
1441 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1442 return retVal; /* SetWindowPos() already did the painting */
1443
1444 if( bRedraw && (action & SA_SSI_REFRESH))
1445 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1446 else if( action & SA_SSI_REPAINT_ARROWS )
1447 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1448 }
1449 return retVal;
1450 }
1451
1452 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1453 const SCROLLINFO *info, INT *action )
1454 {
1455 /* Update the scrollbar state and set action flags according to
1456 * what has to be done graphics wise. */
1457
1458 SCROLLBAR_INFO *infoPtr;
1459 UINT new_flags;
1460 BOOL bChangeParams = FALSE; /* don't show/hide scrollbar if params don't change */
1461
1462 *action = 0;
1463
1464 if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
1465 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1466 if ((info->cbSize != sizeof(*info)) &&
1467 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1468
1469 if (TRACE_ON(scroll))
1470 {
1471 TRACE("hwnd=%p bar=%d", hwnd, nBar);
1472 if (info->fMask & SIF_PAGE) DPRINTF( " page=%d", info->nPage );
1473 if (info->fMask & SIF_POS) DPRINTF( " pos=%d", info->nPos );
1474 if (info->fMask & SIF_RANGE) DPRINTF( " min=%d max=%d", info->nMin, info->nMax );
1475 DPRINTF("\n");
1476 }
1477
1478 /* Set the page size */
1479
1480 if (info->fMask & SIF_PAGE)
1481 {
1482 if( infoPtr->page != info->nPage )
1483 {
1484 infoPtr->page = info->nPage;
1485 *action |= SA_SSI_REFRESH;
1486 bChangeParams = TRUE;
1487 }
1488 }
1489
1490 /* Set the scroll pos */
1491
1492 if (info->fMask & SIF_POS)
1493 {
1494 if( infoPtr->curVal != info->nPos )
1495 {
1496 infoPtr->curVal = info->nPos;
1497 *action |= SA_SSI_REFRESH;
1498 }
1499 }
1500
1501 /* Set the scroll range */
1502
1503 if (info->fMask & SIF_RANGE)
1504 {
1505 /* Invalid range -> range is set to (0,0) */
1506 if ((info->nMin > info->nMax) ||
1507 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1508 {
1509 infoPtr->minVal = 0;
1510 infoPtr->maxVal = 0;
1511 bChangeParams = TRUE;
1512 }
1513 else
1514 {
1515 if( infoPtr->minVal != info->nMin ||
1516 infoPtr->maxVal != info->nMax )
1517 {
1518 *action |= SA_SSI_REFRESH;
1519 infoPtr->minVal = info->nMin;
1520 infoPtr->maxVal = info->nMax;
1521 bChangeParams = TRUE;
1522 }
1523 }
1524 }
1525
1526 /* Make sure the page size is valid */
1527
1528 if (infoPtr->page < 0) infoPtr->page = 0;
1529 else if (infoPtr->page > infoPtr->maxVal - infoPtr->minVal + 1 )
1530 infoPtr->page = infoPtr->maxVal - infoPtr->minVal + 1;
1531
1532 /* Make sure the pos is inside the range */
1533
1534 if (infoPtr->curVal < infoPtr->minVal)
1535 infoPtr->curVal = infoPtr->minVal;
1536 else if (infoPtr->curVal > infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1537 infoPtr->curVal = infoPtr->maxVal - max( infoPtr->page-1, 0 );
1538
1539 TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1540 infoPtr->page, infoPtr->curVal,
1541 infoPtr->minVal, infoPtr->maxVal );
1542
1543 /* don't change the scrollbar state if SetScrollInfo
1544 * is just called with SIF_DISABLENOSCROLL
1545 */
1546 if(!(info->fMask & SIF_ALL)) goto done;
1547
1548 /* Check if the scrollbar should be hidden or disabled */
1549
1550 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1551 {
1552 new_flags = infoPtr->flags;
1553 if (infoPtr->minVal >= infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1554 {
1555 /* Hide or disable scroll-bar */
1556 if (info->fMask & SIF_DISABLENOSCROLL)
1557 {
1558 new_flags = ESB_DISABLE_BOTH;
1559 *action |= SA_SSI_REFRESH;
1560 }
1561 else if ((nBar != SB_CTL) && bChangeParams)
1562 {
1563 *action = SA_SSI_HIDE;
1564 goto done;
1565 }
1566 }
1567 else /* Show and enable scroll-bar */
1568 {
1569 new_flags = 0;
1570 if ((nBar != SB_CTL) && bChangeParams)
1571 *action |= SA_SSI_SHOW;
1572 }
1573
1574 if (infoPtr->flags != new_flags) /* check arrow flags */
1575 {
1576 infoPtr->flags = new_flags;
1577 *action |= SA_SSI_REPAINT_ARROWS;
1578 }
1579 }
1580
1581 done:
1582 /* Return current position */
1583
1584 return infoPtr->curVal;
1585 }
1586
1587
1588 /*************************************************************************
1589 * GetScrollInfo (USER32.@)
1590 * GetScrollInfo can be used to retrieve the position, upper bound,
1591 * lower bound, and page size of a scrollbar control.
1592 *
1593 * RETURNS STD
1594 */
1595 BOOL WINAPI GetScrollInfo(
1596 HWND hwnd /* [in] Handle of window */ ,
1597 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1598 LPSCROLLINFO info /* [in/out] (info.fMask [in] specifies which values are to retrieve) */)
1599 {
1600 SCROLLBAR_INFO *infoPtr;
1601
1602 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1603 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1604 if ((info->cbSize != sizeof(*info)) &&
1605 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1606
1607 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->page;
1608 if (info->fMask & SIF_POS) info->nPos = infoPtr->curVal;
1609 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1610 info->nTrackPos = (SCROLL_TrackingWin == WIN_GetFullHandle(hwnd)) ? SCROLL_TrackingVal : infoPtr->curVal;
1611 if (info->fMask & SIF_RANGE)
1612 {
1613 info->nMin = infoPtr->minVal;
1614 info->nMax = infoPtr->maxVal;
1615 }
1616 return (info->fMask & SIF_ALL) != 0;
1617 }
1618
1619
1620 /*************************************************************************
1621 * SetScrollPos (USER32.@)
1622 *
1623 * RETURNS
1624 * Success: Scrollbar position
1625 * Failure: 0
1626 *
1627 * REMARKS
1628 * Note the ambiguity when 0 is returned. Use GetLastError
1629 * to make sure there was an error (and to know which one).
1630 */
1631 INT WINAPI SetScrollPos(
1632 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1633 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1634 INT nPos /* [in] New value */,
1635 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */ )
1636 {
1637 SCROLLINFO info;
1638 SCROLLBAR_INFO *infoPtr;
1639 INT oldPos;
1640
1641 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1642 oldPos = infoPtr->curVal;
1643 info.cbSize = sizeof(info);
1644 info.nPos = nPos;
1645 info.fMask = SIF_POS;
1646 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1647 return oldPos;
1648 }
1649
1650
1651 /*************************************************************************
1652 * GetScrollPos (USER32.@)
1653 *
1654 * RETURNS
1655 * Success: Current position
1656 * Failure: 0
1657 *
1658 * REMARKS
1659 * Note the ambiguity when 0 is returned. Use GetLastError
1660 * to make sure there was an error (and to know which one).
1661 */
1662 INT WINAPI GetScrollPos(
1663 HWND hwnd, /* [in] Handle of window */
1664 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1665 {
1666 SCROLLBAR_INFO *infoPtr;
1667
1668 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1669 return infoPtr->curVal;
1670 }
1671
1672
1673 /*************************************************************************
1674 * SetScrollRange (USER32.@)
1675 *
1676 * RETURNS STD
1677 */
1678 BOOL WINAPI SetScrollRange(
1679 HWND hwnd, /* [in] Handle of window whose scrollbar will be affected */
1680 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1681 INT minVal, /* [in] New minimum value */
1682 INT maxVal, /* [in] New maximum value */
1683 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1684 {
1685 SCROLLINFO info;
1686
1687 info.cbSize = sizeof(info);
1688 info.nMin = minVal;
1689 info.nMax = maxVal;
1690 info.fMask = SIF_RANGE;
1691 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1692 return TRUE;
1693 }
1694
1695
1696 /*************************************************************************
1697 * SCROLL_SetNCSbState
1698 *
1699 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1700 */
1701 INT SCROLL_SetNCSbState(HWND hwnd, int vMin, int vMax, int vPos,
1702 int hMin, int hMax, int hPos)
1703 {
1704 INT vA, hA;
1705 SCROLLINFO vInfo, hInfo;
1706
1707 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1708 vInfo.nMin = vMin;
1709 vInfo.nMax = vMax;
1710 vInfo.nPos = vPos;
1711 hInfo.nMin = hMin;
1712 hInfo.nMax = hMax;
1713 hInfo.nPos = hPos;
1714 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1715
1716 SCROLL_SetScrollInfo( hwnd, SB_VERT, &vInfo, &vA );
1717 SCROLL_SetScrollInfo( hwnd, SB_HORZ, &hInfo, &hA );
1718
1719 if( !SCROLL_ShowScrollBar( hwnd, SB_BOTH,
1720 (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1721 {
1722 /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1723 if( vA & SA_SSI_REFRESH )
1724 SCROLL_RefreshScrollBar( hwnd, SB_VERT, FALSE, TRUE );
1725
1726 if( hA & SA_SSI_REFRESH )
1727 SCROLL_RefreshScrollBar( hwnd, SB_HORZ, FALSE, TRUE );
1728 }
1729 return 0;
1730 }
1731
1732
1733 /*************************************************************************
1734 * GetScrollRange (USER32.@)
1735 *
1736 * RETURNS STD
1737 */
1738 BOOL WINAPI GetScrollRange(
1739 HWND hwnd, /* [in] Handle of window */
1740 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1741 LPINT lpMin, /* [out] Where to store minimum value */
1742 LPINT lpMax /* [out] Where to store maximum value */)
1743 {
1744 SCROLLBAR_INFO *infoPtr;
1745
1746 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1747 {
1748 if (lpMin) lpMin = 0;
1749 if (lpMax) lpMax = 0;
1750 return FALSE;
1751 }
1752 if (lpMin) *lpMin = infoPtr->minVal;
1753 if (lpMax) *lpMax = infoPtr->maxVal;
1754 return TRUE;
1755 }
1756
1757
1758 /*************************************************************************
1759 * SCROLL_ShowScrollBar()
1760 *
1761 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1762 */
1763 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1764 BOOL fShowH, BOOL fShowV )
1765 {
1766 LONG style = GetWindowLongW( hwnd, GWL_STYLE );
1767
1768 TRACE("hwnd=%p bar=%d horz=%d, vert=%d\n", hwnd, nBar, fShowH, fShowV );
1769
1770 switch(nBar)
1771 {
1772 case SB_CTL:
1773 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1774 return TRUE;
1775
1776 case SB_BOTH:
1777 case SB_HORZ:
1778 if (fShowH)
1779 {
1780 fShowH = !(style & WS_HSCROLL);
1781 style |= WS_HSCROLL;
1782 }
1783 else /* hide it */
1784 {
1785 fShowH = (style & WS_HSCROLL);
1786 style &= ~WS_HSCROLL;
1787 }
1788 if( nBar == SB_HORZ ) {
1789 fShowV = FALSE;
1790 break;
1791 }
1792 /* fall through */
1793
1794 case SB_VERT:
1795 if (fShowV)
1796 {
1797 fShowV = !(style & WS_VSCROLL);
1798 style |= WS_VSCROLL;
1799 }
1800 else /* hide it */
1801 {
1802 fShowV = (style & WS_VSCROLL);
1803 style &= ~WS_VSCROLL;
1804 }
1805 if ( nBar == SB_VERT )
1806 fShowH = FALSE;
1807 break;
1808
1809 default:
1810 return FALSE; /* Nothing to do! */
1811 }
1812
1813 if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1814 {
1815 WIN_SetStyle( hwnd, style );
1816 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1817 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1818 return TRUE;
1819 }
1820 return FALSE; /* no frame changes */
1821 }
1822
1823
1824 /*************************************************************************
1825 * ShowScrollBar (USER32.@)
1826 *
1827 * RETURNS STD
1828 */
1829 BOOL WINAPI ShowScrollBar(
1830 HWND hwnd, /* [in] Handle of window whose scrollbar(s) will be affected */
1831 INT nBar, /* [in] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1832 BOOL fShow /* [in] TRUE = show, FALSE = hide */)
1833 {
1834 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1835 (nBar == SB_HORZ) ? 0 : fShow );
1836 return TRUE;
1837 }
1838
1839
1840 /*************************************************************************
1841 * EnableScrollBar (USER32.@)
1842 */
1843 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1844 {
1845 BOOL bFineWithMe;
1846 SCROLLBAR_INFO *infoPtr;
1847
1848 TRACE("%p %d %d\n", hwnd, nBar, flags );
1849
1850 flags &= ESB_DISABLE_BOTH;
1851
1852 if (nBar == SB_BOTH)
1853 {
1854 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE;
1855 if (!(bFineWithMe = (infoPtr->flags == flags)) )
1856 {
1857 infoPtr->flags = flags;
1858 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1859 }
1860 nBar = SB_HORZ;
1861 }
1862 else
1863 bFineWithMe = TRUE;
1864
1865 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1866 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1867 infoPtr->flags = flags;
1868
1869 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1870 return TRUE;
1871 }
Maarten's multimedia branch