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If using the default values, also set dwType to REG_SZ as our default
[wine/multimedia.git] / controls / scroll.c
blobb52eb9669e0be09bc2a12b79bf6b3908e3baf1bd
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 <stdarg.h>
23
24 #include "windef.h"
25 #include "winbase.h"
26 #include "wingdi.h"
27 #include "wine/winuser16.h"
28 #include "controls.h"
29 #include "win.h"
30 #include "wine/debug.h"
31 #include "user.h"
32 #include "message.h"
33
34 WINE_DEFAULT_DEBUG_CHANNEL(scroll);
35
36 typedef struct
37 {
38 INT curVal; /* Current scroll-bar value */
39 INT minVal; /* Minimum scroll-bar value */
40 INT maxVal; /* Maximum scroll-bar value */
41 INT page; /* Page size of scroll bar (Win32) */
42 UINT flags; /* EnableScrollBar flags */
43 } SCROLLBAR_INFO, *LPSCROLLBAR_INFO;
44
45
46 static HBITMAP hUpArrow;
47 static HBITMAP hDnArrow;
48 static HBITMAP hLfArrow;
49 static HBITMAP hRgArrow;
50 static HBITMAP hUpArrowD;
51 static HBITMAP hDnArrowD;
52 static HBITMAP hLfArrowD;
53 static HBITMAP hRgArrowD;
54 static HBITMAP hUpArrowI;
55 static HBITMAP hDnArrowI;
56 static HBITMAP hLfArrowI;
57 static HBITMAP hRgArrowI;
58
59 #define TOP_ARROW(flags,pressed) \
60 (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
61 #define BOTTOM_ARROW(flags,pressed) \
62 (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
63 #define LEFT_ARROW(flags,pressed) \
64 (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
65 #define RIGHT_ARROW(flags,pressed) \
66 (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
67
68
69 /* Minimum size of the rectangle between the arrows */
70 #define SCROLL_MIN_RECT 4
71
72 /* Minimum size of the thumb in pixels */
73 #define SCROLL_MIN_THUMB 6
74
75 /* Overlap between arrows and thumb */
76 #define SCROLL_ARROW_THUMB_OVERLAP ((TWEAK_WineLook == WIN31_LOOK) ? 1 : 0)
77
78 /* Delay (in ms) before first repetition when holding the button down */
79 #define SCROLL_FIRST_DELAY 200
80
81 /* Delay (in ms) between scroll repetitions */
82 #define SCROLL_REPEAT_DELAY 50
83
84 /* Scroll timer id */
85 #define SCROLL_TIMER 0
86
87 /* Scroll-bar hit testing */
88 enum SCROLL_HITTEST
89 {
90 SCROLL_NOWHERE, /* Outside the scroll bar */
91 SCROLL_TOP_ARROW, /* Top or left arrow */
92 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
93 SCROLL_THUMB, /* Thumb rectangle */
94 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
95 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
96 };
97
98 /* What to do after SCROLL_SetScrollInfo() */
99 #define SA_SSI_HIDE 0x0001
100 #define SA_SSI_SHOW 0x0002
101 #define SA_SSI_REFRESH 0x0004
102 #define SA_SSI_REPAINT_ARROWS 0x0008
103
104 /* Thumb-tracking info */
105 static HWND SCROLL_TrackingWin = 0;
106 static INT SCROLL_TrackingBar = 0;
107 static INT SCROLL_TrackingPos = 0;
108 static INT SCROLL_TrackingVal = 0;
109 /* Hit test code of the last button-down event */
110 static enum SCROLL_HITTEST SCROLL_trackHitTest;
111 static BOOL SCROLL_trackVertical;
112
113 /* Is the moving thumb being displayed? */
114 static BOOL SCROLL_MovingThumb = FALSE;
115
116 /* Local functions */
117 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
118 BOOL fShowH, BOOL fShowV );
119 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
120 const SCROLLINFO *info, INT *action );
121 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
122 RECT *rect, INT arrowSize,
123 INT thumbSize, INT thumbPos,
124 UINT flags, BOOL vertical,
125 BOOL top_selected, BOOL bottom_selected );
126 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
127
128
129 /*********************************************************************
130 * scrollbar class descriptor
131 */
132 const struct builtin_class_descr SCROLL_builtin_class =
133 {
134 "ScrollBar", /* name */
135 CS_GLOBALCLASS | CS_DBLCLKS | CS_VREDRAW | CS_HREDRAW | CS_PARENTDC, /* style */
136 NULL, /* procA (winproc is Unicode only) */
137 ScrollBarWndProc, /* procW */
138 sizeof(SCROLLBAR_INFO), /* extra */
139 IDC_ARROW, /* cursor */
140 0 /* brush */
141 };
142
143 /***********************************************************************
144 * SCROLL_ScrollInfoValid
145 *
146 * Determine if the supplied SCROLLINFO struct is valid.
147 */
148 inline static BOOL SCROLL_ScrollInfoValid(
149 LPSCROLLINFO info /* [in] The SCROLLINFO struct to be tested */)
150 {
151 return !(info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)
152 || (info->cbSize != sizeof(*info)
153 && info->cbSize != sizeof(*info) - sizeof(info->nTrackPos)));
154 }
155
156
157 /***********************************************************************
158 * SCROLL_LoadBitmaps
159 */
160 static void SCROLL_LoadBitmaps(void)
161 {
162 hUpArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
163 hDnArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
164 hLfArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
165 hRgArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
166 hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
167 hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
168 hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
169 hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
170 hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
171 hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
172 hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
173 hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
174 }
175
176
177 /***********************************************************************
178 * SCROLL_GetScrollBarInfo
179 */
180 static SCROLLBAR_INFO *SCROLL_GetScrollBarInfo( HWND hwnd, INT nBar )
181 {
182 SCROLLBAR_INFO *infoPtr;
183 WND *wndPtr = WIN_FindWndPtr( hwnd );
184
185 if (!wndPtr) return NULL;
186 switch(nBar)
187 {
188 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
189 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
190 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
191 default:
192 WIN_ReleaseWndPtr( wndPtr );
193 return NULL;
194 }
195
196 if (!infoPtr) /* Create the info structure if needed */
197 {
198 if ((infoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(SCROLLBAR_INFO) )))
199 {
200 infoPtr->minVal = infoPtr->curVal = infoPtr->page = 0;
201 infoPtr->maxVal = 100;
202 infoPtr->flags = ESB_ENABLE_BOTH;
203 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
204 else wndPtr->pVScroll = infoPtr;
205 }
206 if (!hUpArrow) SCROLL_LoadBitmaps();
207 }
208 WIN_ReleaseWndPtr( wndPtr );
209 return infoPtr;
210 }
211
212
213 /***********************************************************************
214 * SCROLL_GetScrollBarRect
215 *
216 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
217 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
218 * 'arrowSize' returns the width or height of an arrow (depending on
219 * the orientation of the scrollbar), 'thumbSize' returns the size of
220 * the thumb, and 'thumbPos' returns the position of the thumb
221 * relative to the left or to the top.
222 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
223 */
224 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
225 INT *arrowSize, INT *thumbSize,
226 INT *thumbPos )
227 {
228 INT pixels;
229 BOOL vertical;
230 WND *wndPtr = WIN_FindWndPtr( hwnd );
231
232 switch(nBar)
233 {
234 case SB_HORZ:
235 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
236 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
237 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
238 lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
239 if(wndPtr->dwStyle & WS_BORDER) {
240 lprect->left--;
241 lprect->right++;
242 } else if(wndPtr->dwStyle & WS_VSCROLL)
243 lprect->right++;
244 vertical = FALSE;
245 break;
246
247 case SB_VERT:
248 if((wndPtr->dwExStyle & WS_EX_LEFTSCROLLBAR) != 0)
249 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left - GetSystemMetrics(SM_CXVSCROLL);
250 else
251 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
252 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
253 lprect->right = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
254 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
255 if(wndPtr->dwStyle & WS_BORDER) {
256 lprect->top--;
257 lprect->bottom++;
258 } else if(wndPtr->dwStyle & WS_HSCROLL)
259 lprect->bottom++;
260 vertical = TRUE;
261 break;
262
263 case SB_CTL:
264 GetClientRect( hwnd, lprect );
265 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
266 break;
267
268 default:
269 WIN_ReleaseWndPtr(wndPtr);
270 return FALSE;
271 }
272
273 if (vertical) pixels = lprect->bottom - lprect->top;
274 else pixels = lprect->right - lprect->left;
275
276 if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
277 {
278 if (pixels > SCROLL_MIN_RECT)
279 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
280 else
281 *arrowSize = 0;
282 *thumbPos = *thumbSize = 0;
283 }
284 else
285 {
286 SCROLLBAR_INFO *info = SCROLL_GetScrollBarInfo( hwnd, nBar );
287
288 *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
289 pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
290
291 if (info->page)
292 {
293 *thumbSize = MulDiv(pixels,info->page,(info->maxVal-info->minVal+1));
294 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
295 }
296 else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
297
298 if (((pixels -= *thumbSize ) < 0) ||
299 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
300 {
301 /* Rectangle too small or scrollbar disabled -> no thumb */
302 *thumbPos = *thumbSize = 0;
303 }
304 else
305 {
306 INT max = info->maxVal - max( info->page-1, 0 );
307 if (info->minVal >= max)
308 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
309 else
310 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
311 + MulDiv(pixels, (info->curVal-info->minVal),(max - info->minVal));
312 }
313 }
314 WIN_ReleaseWndPtr(wndPtr);
315 return vertical;
316 }
317
318
319 /***********************************************************************
320 * SCROLL_GetThumbVal
321 *
322 * Compute the current scroll position based on the thumb position in pixels
323 * from the top of the scroll-bar.
324 */
325 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
326 BOOL vertical, INT pos )
327 {
328 INT thumbSize;
329 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
330
331 if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
332 return infoPtr->minVal;
333
334 if (infoPtr->page)
335 {
336 thumbSize = MulDiv(pixels,infoPtr->page,(infoPtr->maxVal-infoPtr->minVal+1));
337 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
338 }
339 else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
340
341 if ((pixels -= thumbSize) <= 0) return infoPtr->minVal;
342
343 pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
344 if (pos > pixels) pos = pixels;
345
346 if (!infoPtr->page) pos *= infoPtr->maxVal - infoPtr->minVal;
347 else pos *= infoPtr->maxVal - infoPtr->minVal - infoPtr->page + 1;
348 return infoPtr->minVal + ((pos + pixels / 2) / pixels);
349 }
350
351 /***********************************************************************
352 * SCROLL_PtInRectEx
353 */
354 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
355 {
356 RECT rect = *lpRect;
357
358 if (vertical)
359 {
360 rect.left -= lpRect->right - lpRect->left;
361 rect.right += lpRect->right - lpRect->left;
362 }
363 else
364 {
365 rect.top -= lpRect->bottom - lpRect->top;
366 rect.bottom += lpRect->bottom - lpRect->top;
367 }
368 return PtInRect( &rect, pt );
369 }
370
371 /***********************************************************************
372 * SCROLL_ClipPos
373 */
374 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
375 {
376 if( pt.x < lpRect->left )
377 pt.x = lpRect->left;
378 else
379 if( pt.x > lpRect->right )
380 pt.x = lpRect->right;
381
382 if( pt.y < lpRect->top )
383 pt.y = lpRect->top;
384 else
385 if( pt.y > lpRect->bottom )
386 pt.y = lpRect->bottom;
387
388 return pt;
389 }
390
391
392 /***********************************************************************
393 * SCROLL_HitTest
394 *
395 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
396 */
397 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
398 POINT pt, BOOL bDragging )
399 {
400 INT arrowSize, thumbSize, thumbPos;
401 RECT rect;
402
403 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
404 &arrowSize, &thumbSize, &thumbPos );
405
406 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
407 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
408
409 if (vertical)
410 {
411 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
412 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
413 if (!thumbPos) return SCROLL_TOP_RECT;
414 pt.y -= rect.top;
415 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
416 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
417 }
418 else /* horizontal */
419 {
420 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
421 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
422 if (!thumbPos) return SCROLL_TOP_RECT;
423 pt.x -= rect.left;
424 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
425 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
426 }
427 return SCROLL_THUMB;
428 }
429
430
431 /***********************************************************************
432 * SCROLL_DrawArrows
433 *
434 * Draw the scroll bar arrows.
435 */
436 static void SCROLL_DrawArrows_9x( HDC hdc, SCROLLBAR_INFO *infoPtr,
437 RECT *rect, INT arrowSize, BOOL vertical,
438 BOOL top_pressed, BOOL bottom_pressed )
439 {
440 RECT r;
441
442 r = *rect;
443 if( vertical )
444 r.bottom = r.top + arrowSize;
445 else
446 r.right = r.left + arrowSize;
447
448 DrawFrameControl( hdc, &r, DFC_SCROLL,
449 (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
450 | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
451 | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
452
453 r = *rect;
454 if( vertical )
455 r.top = r.bottom-arrowSize;
456 else
457 r.left = r.right-arrowSize;
458
459 DrawFrameControl( hdc, &r, DFC_SCROLL,
460 (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
461 | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
462 | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
463 }
464
465 static void SCROLL_DrawArrows_31( HDC hdc, SCROLLBAR_INFO *infoPtr,
466 RECT *rect, INT arrowSize, BOOL vertical,
467 BOOL top_pressed, BOOL bottom_pressed )
468 {
469 HDC hdcMem = CreateCompatibleDC( hdc );
470 HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
471 TOP_ARROW(infoPtr->flags, top_pressed)
472 : LEFT_ARROW(infoPtr->flags, top_pressed));
473
474 SetStretchBltMode( hdc, STRETCH_DELETESCANS );
475 StretchBlt( hdc, rect->left, rect->top,
476 vertical ? rect->right-rect->left : arrowSize,
477 vertical ? arrowSize : rect->bottom-rect->top,
478 hdcMem, 0, 0,
479 GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
480 SRCCOPY );
481
482 SelectObject( hdcMem, vertical ?
483 BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
484 : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
485 if (vertical)
486 StretchBlt( hdc, rect->left, rect->bottom - arrowSize,
487 rect->right - rect->left, arrowSize,
488 hdcMem, 0, 0,
489 GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
490 SRCCOPY );
491 else
492 StretchBlt( hdc, rect->right - arrowSize, rect->top,
493 arrowSize, rect->bottom - rect->top,
494 hdcMem, 0, 0,
495 GetSystemMetrics(SM_CXVSCROLL), GetSystemMetrics(SM_CYHSCROLL),
496 SRCCOPY );
497 SelectObject( hdcMem, hbmpPrev );
498 DeleteDC( hdcMem );
499 }
500
501 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
502 RECT *rect, INT arrowSize, BOOL vertical,
503 BOOL top_pressed, BOOL bottom_pressed )
504 {
505 if( TWEAK_WineLook == WIN31_LOOK )
506 SCROLL_DrawArrows_31( hdc, infoPtr, rect, arrowSize,
507 vertical, top_pressed,bottom_pressed );
508 else
509 SCROLL_DrawArrows_9x( hdc, infoPtr, rect, arrowSize,
510 vertical, top_pressed,bottom_pressed );
511 }
512
513
514 /***********************************************************************
515 * SCROLL_DrawMovingThumb
516 *
517 * Draw the moving thumb rectangle.
518 */
519 static void SCROLL_DrawMovingThumb_31( HDC hdc, RECT *rect, BOOL vertical,
520 INT arrowSize, INT thumbSize )
521 {
522 RECT r = *rect;
523 if (vertical)
524 {
525 r.top += SCROLL_TrackingPos;
526 if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
527 r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
528 if (r.top + thumbSize >
529 rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
530 r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
531 - thumbSize;
532 r.bottom = r.top + thumbSize;
533 }
534 else
535 {
536 r.left += SCROLL_TrackingPos;
537 if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
538 r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
539 if (r.left + thumbSize >
540 rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
541 r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
542 - thumbSize;
543 r.right = r.left + thumbSize;
544 }
545
546 DrawFocusRect( hdc, &r );
547 SCROLL_MovingThumb = !SCROLL_MovingThumb;
548 }
549
550 static void SCROLL_DrawMovingThumb_9x( HDC hdc, RECT *rect, BOOL vertical,
551 INT arrowSize, INT thumbSize )
552 {
553 INT pos = SCROLL_TrackingPos;
554 INT max_size;
555
556 if( vertical )
557 max_size = rect->bottom - rect->top;
558 else
559 max_size = rect->right - rect->left;
560
561 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
562
563 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
564 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
565 else if( pos > max_size )
566 pos = max_size;
567
568 SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
569 rect, arrowSize, thumbSize, pos,
570 0, vertical, FALSE, FALSE );
571
572 SCROLL_MovingThumb = !SCROLL_MovingThumb;
573 }
574
575 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
576 INT arrowSize, INT thumbSize )
577 {
578 if( TWEAK_WineLook == WIN31_LOOK )
579 SCROLL_DrawMovingThumb_31( hdc, rect, vertical, arrowSize, thumbSize );
580 else
581 SCROLL_DrawMovingThumb_9x( hdc, rect, vertical, arrowSize, thumbSize );
582 }
583
584 /***********************************************************************
585 * SCROLL_DrawInterior
586 *
587 * Draw the scroll bar interior (everything except the arrows).
588 */
589 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
590 RECT *rect, INT arrowSize,
591 INT thumbSize, INT thumbPos,
592 UINT flags, BOOL vertical,
593 BOOL top_selected, BOOL bottom_selected )
594 {
595 RECT r;
596 HPEN hSavePen;
597 HBRUSH hSaveBrush,hBrush;
598
599 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
600 * The window-owned scrollbars need to call DEFWND_ControlColor
601 * to correctly setup default scrollbar colors
602 */
603 if (nBar == SB_CTL)
604 {
605 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
606 (WPARAM)hdc,(LPARAM)hwnd);
607 }
608 else
609 {
610 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
611 }
612
613 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
614 hSaveBrush = SelectObject( hdc, hBrush );
615
616 /* Calculate the scroll rectangle */
617 r = *rect;
618 if (vertical)
619 {
620 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
621 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
622 }
623 else
624 {
625 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
626 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
627 }
628
629 /* Draw the scroll rectangles and thumb */
630 if (!thumbPos) /* No thumb to draw */
631 {
632 PatBlt( hdc, r.left, r.top,
633 r.right - r.left, r.bottom - r.top,
634 PATCOPY );
635
636 /* cleanup and return */
637 SelectObject( hdc, hSavePen );
638 SelectObject( hdc, hSaveBrush );
639 return;
640 }
641
642 if (vertical)
643 {
644 PatBlt( hdc, r.left, r.top,
645 r.right - r.left,
646 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
647 top_selected ? 0x0f0000 : PATCOPY );
648 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
649 PatBlt( hdc, r.left, r.top + thumbSize,
650 r.right - r.left,
651 r.bottom - r.top - thumbSize,
652 bottom_selected ? 0x0f0000 : PATCOPY );
653 r.bottom = r.top + thumbSize;
654 }
655 else /* horizontal */
656 {
657 PatBlt( hdc, r.left, r.top,
658 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
659 r.bottom - r.top,
660 top_selected ? 0x0f0000 : PATCOPY );
661 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
662 PatBlt( hdc, r.left + thumbSize, r.top,
663 r.right - r.left - thumbSize,
664 r.bottom - r.top,
665 bottom_selected ? 0x0f0000 : PATCOPY );
666 r.right = r.left + thumbSize;
667 }
668
669 /* Draw the thumb */
670 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
671
672 /* cleanup */
673 SelectObject( hdc, hSavePen );
674 SelectObject( hdc, hSaveBrush );
675 }
676
677
678 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
679 RECT *rect, INT arrowSize,
680 INT thumbSize, INT thumbPos,
681 UINT flags, BOOL vertical,
682 BOOL top_selected, BOOL bottom_selected )
683 {
684 RECT r;
685 HPEN hSavePen;
686 HBRUSH hSaveBrush,hBrush;
687 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
688
689 if (Save_SCROLL_MovingThumb &&
690 (SCROLL_TrackingWin == hwnd) &&
691 (SCROLL_TrackingBar == nBar))
692 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
693
694 /* Select the correct brush and pen */
695
696 if (TWEAK_WineLook == WIN31_LOOK && (flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
697 {
698 /* This ought to be the color of the parent window */
699 hBrush = GetSysColorBrush(COLOR_WINDOW);
700 }
701 else
702 {
703 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
704 * The window-owned scrollbars need to call DEFWND_ControlColor
705 * to correctly setup default scrollbar colors
706 */
707 if (nBar == SB_CTL) {
708 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
709 (WPARAM)hdc,(LPARAM)hwnd);
710 } else {
711 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
712 }
713 }
714 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
715 hSaveBrush = SelectObject( hdc, hBrush );
716
717 /* Calculate the scroll rectangle */
718
719 r = *rect;
720 if (vertical)
721 {
722 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
723 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
724 }
725 else
726 {
727 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
728 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
729 }
730
731 /* Draw the scroll bar frame */
732
733 /* Only draw outline if Win 3.1. Mar 24, 1999 - Ronald B. Cemer */
734 if (TWEAK_WineLook == WIN31_LOOK)
735 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
736
737 /* Draw the scroll rectangles and thumb */
738
739 if (!thumbPos) /* No thumb to draw */
740 {
741 INT offset = (TWEAK_WineLook > WIN31_LOOK) ? 0 : 1;
742
743 PatBlt( hdc, r.left+offset, r.top+offset,
744 r.right - r.left - 2*offset, r.bottom - r.top - 2*offset,
745 PATCOPY );
746
747 /* cleanup and return */
748 SelectObject( hdc, hSavePen );
749 SelectObject( hdc, hSaveBrush );
750 return;
751 }
752
753 if (vertical)
754 {
755 INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
756
757 PatBlt( hdc, r.left + offset, r.top + offset,
758 r.right - r.left - offset*2,
759 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - offset,
760 top_selected ? 0x0f0000 : PATCOPY );
761 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
762 PatBlt( hdc, r.left + offset, r.top + thumbSize,
763 r.right - r.left - offset*2,
764 r.bottom - r.top - thumbSize - offset,
765 bottom_selected ? 0x0f0000 : PATCOPY );
766 r.bottom = r.top + thumbSize;
767 }
768 else /* horizontal */
769 {
770 INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
771
772 PatBlt( hdc, r.left + offset, r.top + offset,
773 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
774 r.bottom - r.top - offset*2,
775 top_selected ? 0x0f0000 : PATCOPY );
776 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
777 PatBlt( hdc, r.left + thumbSize, r.top + offset,
778 r.right - r.left - thumbSize - offset,
779 r.bottom - r.top - offset*2,
780 bottom_selected ? 0x0f0000 : PATCOPY );
781 r.right = r.left + thumbSize;
782 }
783
784 /* Draw the thumb */
785
786 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
787 if (TWEAK_WineLook == WIN31_LOOK)
788 {
789 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
790 r.top++, r.left++;
791 }
792 else
793 {
794 Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
795 }
796 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
797
798 if (Save_SCROLL_MovingThumb &&
799 (SCROLL_TrackingWin == hwnd) &&
800 (SCROLL_TrackingBar == nBar))
801 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
802
803 /* cleanup */
804 SelectObject( hdc, hSavePen );
805 SelectObject( hdc, hSaveBrush );
806 }
807
808
809 /***********************************************************************
810 * SCROLL_DrawScrollBar
811 *
812 * Redraw the whole scrollbar.
813 */
814 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
815 BOOL arrows, BOOL interior )
816 {
817 INT arrowSize, thumbSize, thumbPos;
818 RECT rect;
819 BOOL vertical;
820 WND *wndPtr = WIN_FindWndPtr( hwnd );
821 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar );
822 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
823
824 if (!wndPtr || !infoPtr ||
825 ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
826 ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
827 if (!WIN_IsWindowDrawable( hwnd, FALSE )) goto END;
828 hwnd = wndPtr->hwndSelf; /* make it a full handle */
829
830 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
831 &arrowSize, &thumbSize, &thumbPos );
832
833 /* do not draw if the scrollbar rectangle is empty */
834 if(IsRectEmpty(&rect))
835 goto END;
836
837 if (Save_SCROLL_MovingThumb &&
838 (SCROLL_TrackingWin == hwnd) &&
839 (SCROLL_TrackingBar == nBar))
840 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
841
842 /* Draw the arrows */
843
844 if (arrows && arrowSize)
845 {
846 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
847 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
848 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
849 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
850 else
851 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
852 FALSE, FALSE );
853 }
854 if( interior )
855 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
856 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
857
858 if (Save_SCROLL_MovingThumb &&
859 (SCROLL_TrackingWin == hwnd) &&
860 (SCROLL_TrackingBar == nBar))
861 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
862
863 /* if scroll bar has focus, reposition the caret */
864 if(hwnd==GetFocus() && (nBar==SB_CTL))
865 {
866 if (!vertical)
867 {
868 SetCaretPos(thumbPos+1, rect.top+1);
869 }
870 else
871 {
872 SetCaretPos(rect.top+1, thumbPos+1);
873 }
874 }
875
876 END:
877 WIN_ReleaseWndPtr(wndPtr);
878 }
879
880
881 /***********************************************************************
882 * SCROLL_RefreshScrollBar
883 *
884 * Repaint the scroll bar interior after a SetScrollRange() or
885 * SetScrollPos() call.
886 */
887 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
888 BOOL arrows, BOOL interior )
889 {
890 HDC hdc = GetDCEx( hwnd, 0,
891 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
892 if (!hdc) return;
893
894 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
895 ReleaseDC( hwnd, hdc );
896 }
897
898
899 /***********************************************************************
900 * SCROLL_HandleKbdEvent
901 *
902 * Handle a keyboard event (only for SB_CTL scrollbars with focus).
903 */
904 static void SCROLL_HandleKbdEvent(
905 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
906 WPARAM wParam /* [in] Variable input including enable state */,
907 LPARAM lParam /* [in] Variable input including input point */)
908 {
909 TRACE("hwnd=%p wParam=%d lParam=%ld\n", hwnd, wParam, lParam);
910
911 /* hide caret on first KEYDOWN to prevent flicker */
912 if ((lParam & PFD_DOUBLEBUFFER_DONTCARE) == 0)
913 HideCaret(hwnd);
914
915 switch(wParam)
916 {
917 case VK_PRIOR: wParam = SB_PAGEUP; break;
918 case VK_NEXT: wParam = SB_PAGEDOWN; break;
919 case VK_HOME: wParam = SB_TOP; break;
920 case VK_END: wParam = SB_BOTTOM; break;
921 case VK_UP: wParam = SB_LINEUP; break;
922 case VK_DOWN: wParam = SB_LINEDOWN; break;
923 default: return;
924 }
925 SendMessageW(GetParent(hwnd),
926 ((GetWindowLongA( hwnd, GWL_STYLE ) & SBS_VERT) ?
927 WM_VSCROLL : WM_HSCROLL), wParam, (LPARAM)hwnd);
928 }
929
930
931 /***********************************************************************
932 * SCROLL_HandleScrollEvent
933 *
934 * Handle a mouse or timer event for the scrollbar.
935 * 'pt' is the location of the mouse event in client (for SB_CTL) or
936 * windows coordinates.
937 */
938 static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
939 {
940 /* Previous mouse position for timer events */
941 static POINT prevPt;
942 /* Thumb position when tracking started. */
943 static UINT trackThumbPos;
944 /* Position in the scroll-bar of the last button-down event. */
945 static INT lastClickPos;
946 /* Position in the scroll-bar of the last mouse event. */
947 static INT lastMousePos;
948
949 enum SCROLL_HITTEST hittest;
950 HWND hwndOwner, hwndCtl;
951 BOOL vertical;
952 INT arrowSize, thumbSize, thumbPos;
953 RECT rect;
954 HDC hdc;
955
956 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar );
957 if (!infoPtr) return;
958 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
959 return;
960
961 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
962 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
963 &arrowSize, &thumbSize, &thumbPos );
964 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
965 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
966
967 switch(msg)
968 {
969 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
970 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
971 SCROLL_trackVertical = vertical;
972 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
973 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
974 lastMousePos = lastClickPos;
975 trackThumbPos = thumbPos;
976 prevPt = pt;
977 if (nBar == SB_CTL && (GetWindowLongA(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
978 SetCapture( hwnd );
979 break;
980
981 case WM_MOUSEMOVE:
982 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
983 prevPt = pt;
984 break;
985
986 case WM_LBUTTONUP:
987 hittest = SCROLL_NOWHERE;
988 ReleaseCapture();
989 /* if scrollbar has focus, show back caret */
990 if (hwnd==GetFocus()) ShowCaret(hwnd);
991 break;
992
993 case WM_SYSTIMER:
994 pt = prevPt;
995 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
996 break;
997
998 default:
999 return; /* Should never happen */
1000 }
1001
1002 TRACE("Event: hwnd=%p bar=%d msg=%s pt=%ld,%ld hit=%d\n",
1003 hwnd, nBar, SPY_GetMsgName(msg,hwnd), pt.x, pt.y, hittest );
1004
1005 switch(SCROLL_trackHitTest)
1006 {
1007 case SCROLL_NOWHERE: /* No tracking in progress */
1008 break;
1009
1010 case SCROLL_TOP_ARROW:
1011 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1012 (hittest == SCROLL_trackHitTest), FALSE );
1013 if (hittest == SCROLL_trackHitTest)
1014 {
1015 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1016 {
1017 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1018 SB_LINEUP, (LPARAM)hwndCtl );
1019 }
1020
1021 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1022 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1023 (TIMERPROC)0 );
1024 }
1025 else KillSystemTimer( hwnd, SCROLL_TIMER );
1026 break;
1027
1028 case SCROLL_TOP_RECT:
1029 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1030 thumbPos, infoPtr->flags, vertical,
1031 (hittest == SCROLL_trackHitTest), FALSE );
1032 if (hittest == SCROLL_trackHitTest)
1033 {
1034 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1035 {
1036 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1037 SB_PAGEUP, (LPARAM)hwndCtl );
1038 }
1039 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1040 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1041 (TIMERPROC)0 );
1042 }
1043 else KillSystemTimer( hwnd, SCROLL_TIMER );
1044 break;
1045
1046 case SCROLL_THUMB:
1047 if (msg == WM_LBUTTONDOWN)
1048 {
1049 SCROLL_TrackingWin = hwnd;
1050 SCROLL_TrackingBar = nBar;
1051 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
1052 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1053 vertical,
1054 SCROLL_TrackingPos );
1055 if (!SCROLL_MovingThumb)
1056 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1057 }
1058 else if (msg == WM_LBUTTONUP)
1059 {
1060 if (SCROLL_MovingThumb)
1061 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1062 SCROLL_TrackingWin = 0;
1063 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1064 thumbPos, infoPtr->flags, vertical,
1065 FALSE, FALSE );
1066 }
1067 else /* WM_MOUSEMOVE */
1068 {
1069 UINT pos;
1070
1071 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
1072 else
1073 {
1074 pt = SCROLL_ClipPos( &rect, pt );
1075 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
1076 }
1077 if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
1078 {
1079 if (SCROLL_MovingThumb)
1080 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1081 arrowSize, thumbSize );
1082 lastMousePos = pos;
1083 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
1084 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1085 vertical,
1086 SCROLL_TrackingPos );
1087 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1088 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1089 (LPARAM)hwndCtl );
1090 if (!SCROLL_MovingThumb)
1091 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1092 arrowSize, thumbSize );
1093 }
1094 }
1095 break;
1096
1097 case SCROLL_BOTTOM_RECT:
1098 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1099 thumbPos, infoPtr->flags, vertical,
1100 FALSE, (hittest == SCROLL_trackHitTest) );
1101 if (hittest == SCROLL_trackHitTest)
1102 {
1103 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1104 {
1105 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1106 SB_PAGEDOWN, (LPARAM)hwndCtl );
1107 }
1108 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1109 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1110 (TIMERPROC)0 );
1111 }
1112 else KillSystemTimer( hwnd, SCROLL_TIMER );
1113 break;
1114
1115 case SCROLL_BOTTOM_ARROW:
1116 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1117 FALSE, (hittest == SCROLL_trackHitTest) );
1118 if (hittest == SCROLL_trackHitTest)
1119 {
1120 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1121 {
1122 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1123 SB_LINEDOWN, (LPARAM)hwndCtl );
1124 }
1125
1126 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1127 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1128 (TIMERPROC)0 );
1129 }
1130 else KillSystemTimer( hwnd, SCROLL_TIMER );
1131 break;
1132 }
1133
1134 if (msg == WM_LBUTTONDOWN)
1135 {
1136
1137 if (hittest == SCROLL_THUMB)
1138 {
1139 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1140 trackThumbPos + lastMousePos - lastClickPos );
1141 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1142 MAKEWPARAM( SB_THUMBTRACK, val ), (LPARAM)hwndCtl );
1143 }
1144 }
1145
1146 if (msg == WM_LBUTTONUP)
1147 {
1148 hittest = SCROLL_trackHitTest;
1149 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1150
1151 if (hittest == SCROLL_THUMB)
1152 {
1153 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1154 trackThumbPos + lastMousePos - lastClickPos );
1155 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1156 MAKEWPARAM( SB_THUMBPOSITION, val ), (LPARAM)hwndCtl );
1157 }
1158 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1159 SB_ENDSCROLL, (LPARAM)hwndCtl );
1160 }
1161
1162 ReleaseDC( hwnd, hdc );
1163 }
1164
1165
1166 /***********************************************************************
1167 * SCROLL_TrackScrollBar
1168 *
1169 * Track a mouse button press on a scroll-bar.
1170 * pt is in screen-coordinates for non-client scroll bars.
1171 */
1172 void SCROLL_TrackScrollBar( HWND hwnd, INT scrollbar, POINT pt )
1173 {
1174 MSG msg;
1175 INT xoffset = 0, yoffset = 0;
1176
1177 if (scrollbar != SB_CTL)
1178 {
1179 WND *wndPtr = WIN_GetPtr( hwnd );
1180 if (!wndPtr || wndPtr == WND_OTHER_PROCESS) return;
1181 xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
1182 yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
1183 WIN_ReleasePtr( wndPtr );
1184 ScreenToClient( hwnd, &pt );
1185 pt.x += xoffset;
1186 pt.y += yoffset;
1187 }
1188
1189 SCROLL_HandleScrollEvent( hwnd, scrollbar, WM_LBUTTONDOWN, pt );
1190
1191 do
1192 {
1193 if (!GetMessageW( &msg, 0, 0, 0 )) break;
1194 if (CallMsgFilterW( &msg, MSGF_SCROLLBAR )) continue;
1195 switch(msg.message)
1196 {
1197 case WM_LBUTTONUP:
1198 case WM_MOUSEMOVE:
1199 case WM_SYSTIMER:
1200 pt.x = LOWORD(msg.lParam) + xoffset;
1201 pt.y = HIWORD(msg.lParam) + yoffset;
1202 SCROLL_HandleScrollEvent( hwnd, scrollbar, msg.message, pt );
1203 break;
1204 default:
1205 TranslateMessage( &msg );
1206 DispatchMessageW( &msg );
1207 break;
1208 }
1209 if (!IsWindow( hwnd ))
1210 {
1211 ReleaseCapture();
1212 break;
1213 }
1214 } while (msg.message != WM_LBUTTONUP);
1215 }
1216
1217
1218 /***********************************************************************
1219 * SCROLL_CreateScrollBar
1220 *
1221 * Create a scroll bar
1222 */
1223 static void SCROLL_CreateScrollBar(
1224 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1225 LPCREATESTRUCTW lpCreate /* [in] The style and place of the scroll bar */)
1226 {
1227 LPSCROLLBAR_INFO info = SCROLL_GetScrollBarInfo(hwnd, SB_CTL);
1228 if (!info) return;
1229
1230 TRACE("hwnd=%p lpCreate=%p\n", hwnd, lpCreate);
1231
1232 if (lpCreate->style & WS_DISABLED)
1233 {
1234 info->flags = ESB_DISABLE_BOTH;
1235 TRACE("Created WS_DISABLED scrollbar\n");
1236 }
1237
1238 if (lpCreate->style & SBS_VERT)
1239 {
1240 if (lpCreate->style & SBS_LEFTALIGN)
1241 MoveWindow( hwnd, lpCreate->x, lpCreate->y,
1242 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreate->cy, FALSE );
1243 else if (lpCreate->style & SBS_RIGHTALIGN)
1244 MoveWindow( hwnd,
1245 lpCreate->x+lpCreate->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1246 lpCreate->y,
1247 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreate->cy, FALSE );
1248 }
1249 else /* SBS_HORZ */
1250 {
1251 if (lpCreate->style & SBS_TOPALIGN)
1252 MoveWindow( hwnd, lpCreate->x, lpCreate->y,
1253 lpCreate->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1254 else if (lpCreate->style & SBS_BOTTOMALIGN)
1255 MoveWindow( hwnd,
1256 lpCreate->x,
1257 lpCreate->y+lpCreate->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1258 lpCreate->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1259 }
1260 }
1261
1262
1263 /*************************************************************************
1264 * SCROLL_GetScrollInfo
1265 *
1266 * Internal helper for the API function
1267 */
1268 static BOOL SCROLL_GetScrollInfo(
1269 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1270 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1271 LPSCROLLINFO info /* [in/out] (fMask specifies which values to retrieve) */)
1272 {
1273 LPSCROLLBAR_INFO infoPtr;
1274
1275 /* handle invalid data structure */
1276 if (!SCROLL_ScrollInfoValid(info)
1277 || !(infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar)))
1278 return FALSE;
1279
1280 /* fill in the desired scroll info structure */
1281 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->page;
1282 if (info->fMask & SIF_POS) info->nPos = infoPtr->curVal;
1283 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1284 info->nTrackPos = (SCROLL_TrackingWin == WIN_GetFullHandle(hwnd)) ? SCROLL_TrackingVal : infoPtr->curVal;
1285 if (info->fMask & SIF_RANGE)
1286 {
1287 info->nMin = infoPtr->minVal;
1288 info->nMax = infoPtr->maxVal;
1289 }
1290
1291 return (info->fMask & SIF_ALL) != 0;
1292 }
1293
1294
1295 /*************************************************************************
1296 * SCROLL_GetScrollPos
1297 *
1298 * Internal helper for the API function
1299 */
1300 static INT SCROLL_GetScrollPos(
1301 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1302 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1303 {
1304 LPSCROLLBAR_INFO infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar);
1305 return infoPtr ? infoPtr->curVal: 0;
1306 }
1307
1308
1309 /*************************************************************************
1310 * SCROLL_GetScrollRange
1311 *
1312 * Internal helper for the API function
1313 *
1314 * RETURNS STD
1315 */
1316 static BOOL SCROLL_GetScrollRange(
1317 HWND hwnd, /* [in] Handle of window */
1318 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1319 LPINT lpMin, /* [out] Where to store minimum value */
1320 LPINT lpMax /* [out] Where to store maximum value */)
1321 {
1322 LPSCROLLBAR_INFO infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar);
1323
1324 if (lpMin) *lpMin = infoPtr ? infoPtr->minVal : 0;
1325 if (lpMax) *lpMax = infoPtr ? infoPtr->maxVal : 0;
1326
1327 return infoPtr ? TRUE : FALSE;
1328 }
1329
1330
1331
1332 /***********************************************************************
1333 * ScrollBarWndProc
1334 */
1335 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1336 {
1337 if (!IsWindow( hwnd )) return 0;
1338
1339 switch(message)
1340 {
1341 case WM_CREATE:
1342 SCROLL_CreateScrollBar(hwnd, (LPCREATESTRUCTW)lParam);
1343 if (!hUpArrow) SCROLL_LoadBitmaps();
1344 break;
1345
1346 case WM_ENABLE:
1347 {
1348 SCROLLBAR_INFO *infoPtr;
1349 if ((infoPtr = SCROLL_GetScrollBarInfo( hwnd, SB_CTL )))
1350 {
1351 infoPtr->flags = wParam ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH;
1352 SCROLL_RefreshScrollBar(hwnd, SB_CTL, TRUE, TRUE);
1353 }
1354 }
1355 return 0;
1356
1357 case WM_LBUTTONDOWN:
1358 {
1359 POINT pt;
1360 pt.x = (short)LOWORD(lParam);
1361 pt.y = (short)HIWORD(lParam);
1362 SCROLL_TrackScrollBar( hwnd, SB_CTL, pt );
1363 }
1364 break;
1365 case WM_LBUTTONUP:
1366 case WM_MOUSEMOVE:
1367 case WM_SYSTIMER:
1368 {
1369 POINT pt;
1370 pt.x = (short)LOWORD(lParam);
1371 pt.y = (short)HIWORD(lParam);
1372 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1373 }
1374 break;
1375
1376 case WM_KEYDOWN:
1377 SCROLL_HandleKbdEvent(hwnd, wParam, lParam);
1378 break;
1379
1380 case WM_KEYUP:
1381 ShowCaret(hwnd);
1382 break;
1383
1384 case WM_SETFOCUS:
1385 {
1386 /* Create a caret when a ScrollBar get focus */
1387 RECT rect;
1388 int arrowSize, thumbSize, thumbPos, vertical;
1389 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1390 &arrowSize, &thumbSize, &thumbPos );
1391 if (!vertical)
1392 {
1393 CreateCaret(hwnd, (HBITMAP)1, thumbSize-2, rect.bottom-rect.top-2);
1394 SetCaretPos(thumbPos+1, rect.top+1);
1395 }
1396 else
1397 {
1398 CreateCaret(hwnd, (HBITMAP)1, rect.right-rect.left-2,thumbSize-2);
1399 SetCaretPos(rect.top+1, thumbPos+1);
1400 }
1401 ShowCaret(hwnd);
1402 }
1403 break;
1404
1405 case WM_KILLFOCUS:
1406 {
1407 RECT rect;
1408 int arrowSize, thumbSize, thumbPos, vertical;
1409 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1410 if (!vertical){
1411 rect.left=thumbPos+1;
1412 rect.right=rect.left+thumbSize;
1413 }
1414 else
1415 {
1416 rect.top=thumbPos+1;
1417 rect.bottom=rect.top+thumbSize;
1418 }
1419 HideCaret(hwnd);
1420 InvalidateRect(hwnd,&rect,0);
1421 DestroyCaret();
1422 }
1423 break;
1424
1425 case WM_ERASEBKGND:
1426 return 1;
1427
1428 case WM_GETDLGCODE:
1429 return DLGC_WANTARROWS; /* Windows returns this value */
1430
1431 case WM_PAINT:
1432 {
1433 PAINTSTRUCT ps;
1434 HDC hdc = wParam ? (HDC)wParam : BeginPaint(hwnd, &ps);
1435 if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEBOX)
1436 {
1437 RECT rc;
1438 GetClientRect( hwnd, &rc );
1439 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
1440 }
1441 else
1442 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1443 if (!wParam) EndPaint(hwnd, &ps);
1444 }
1445 break;
1446
1447 case SBM_SETPOS16:
1448 case SBM_SETPOS:
1449 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1450
1451 case SBM_GETPOS16:
1452 case SBM_GETPOS:
1453 return SCROLL_GetScrollPos(hwnd, SB_CTL);
1454
1455 case SBM_SETRANGE16:
1456 SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
1457 wParam /* FIXME: Is this correct? */ );
1458 return 0;
1459
1460 case SBM_SETRANGE:
1461 {
1462 INT oldPos = SCROLL_GetScrollPos( hwnd, SB_CTL );
1463 SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
1464 if (oldPos != SCROLL_GetScrollPos( hwnd, SB_CTL )) return oldPos;
1465 }
1466 return 0;
1467
1468 case SBM_GETRANGE16:
1469 FIXME("don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
1470 return 0;
1471
1472 case SBM_GETRANGE:
1473 return SCROLL_GetScrollRange(hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam);
1474
1475 case SBM_ENABLE_ARROWS16:
1476 case SBM_ENABLE_ARROWS:
1477 return EnableScrollBar( hwnd, SB_CTL, wParam );
1478
1479 case SBM_SETRANGEREDRAW:
1480 {
1481 INT oldPos = SCROLL_GetScrollPos( hwnd, SB_CTL );
1482 SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
1483 if (oldPos != SCROLL_GetScrollPos( hwnd, SB_CTL )) return oldPos;
1484 }
1485 return 0;
1486
1487 case SBM_SETSCROLLINFO:
1488 return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1489
1490 case SBM_GETSCROLLINFO:
1491 return SCROLL_GetScrollInfo(hwnd, SB_CTL, (SCROLLINFO *)lParam);
1492
1493 case 0x00e5:
1494 case 0x00e7:
1495 case 0x00e8:
1496 case 0x00eb:
1497 case 0x00ec:
1498 case 0x00ed:
1499 case 0x00ee:
1500 case 0x00ef:
1501 ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1502 message, wParam, lParam );
1503 break;
1504
1505 default:
1506 if (message >= WM_USER)
1507 WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1508 message, wParam, lParam );
1509 return DefWindowProcW( hwnd, message, wParam, lParam );
1510 }
1511 return 0;
1512 }
1513
1514
1515 /*************************************************************************
1516 * SetScrollInfo (USER32.@)
1517 * SetScrollInfo can be used to set the position, upper bound,
1518 * lower bound, and page size of a scrollbar control.
1519 *
1520 * RETURNS
1521 * Scrollbar position
1522 *
1523 * NOTE
1524 * For 100 lines of text to be displayed in a window of 25 lines,
1525 * one would for instance use info->nMin=0, info->nMax=75
1526 * (corresponding to the 76 different positions of the window on
1527 * the text), and info->nPage=25.
1528 */
1529 INT WINAPI SetScrollInfo(
1530 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1531 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1532 const SCROLLINFO *info /* [in] Specifies what to change and new values */,
1533 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1534 {
1535 INT action;
1536 INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1537
1538 if( action & SA_SSI_HIDE )
1539 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1540 else
1541 {
1542 if( action & SA_SSI_SHOW )
1543 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1544 return retVal; /* SetWindowPos() already did the painting */
1545
1546 if( bRedraw )
1547 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1548 else if( action & SA_SSI_REPAINT_ARROWS )
1549 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1550 }
1551 return retVal;
1552 }
1553
1554 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1555 const SCROLLINFO *info, INT *action )
1556 {
1557 /* Update the scrollbar state and set action flags according to
1558 * what has to be done graphics wise. */
1559
1560 SCROLLBAR_INFO *infoPtr;
1561 UINT new_flags;
1562 BOOL bChangeParams = FALSE; /* don't show/hide scrollbar if params don't change */
1563
1564 *action = 0;
1565
1566 if (!(infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar))) return 0;
1567 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1568 if ((info->cbSize != sizeof(*info)) &&
1569 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1570
1571 if (TRACE_ON(scroll))
1572 {
1573 TRACE("hwnd=%p bar=%d", hwnd, nBar);
1574 if (info->fMask & SIF_PAGE) TRACE( " page=%d", info->nPage );
1575 if (info->fMask & SIF_POS) TRACE( " pos=%d", info->nPos );
1576 if (info->fMask & SIF_RANGE) TRACE( " min=%d max=%d", info->nMin, info->nMax );
1577 TRACE("\n");
1578 }
1579
1580 /* Set the page size */
1581
1582 if (info->fMask & SIF_PAGE)
1583 {
1584 if( infoPtr->page != info->nPage )
1585 {
1586 infoPtr->page = info->nPage;
1587 *action |= SA_SSI_REFRESH;
1588 bChangeParams = TRUE;
1589 }
1590 }
1591
1592 /* Set the scroll pos */
1593
1594 if (info->fMask & SIF_POS)
1595 {
1596 if( infoPtr->curVal != info->nPos )
1597 {
1598 infoPtr->curVal = info->nPos;
1599 *action |= SA_SSI_REFRESH;
1600 }
1601 }
1602
1603 /* Set the scroll range */
1604
1605 if (info->fMask & SIF_RANGE)
1606 {
1607 /* Invalid range -> range is set to (0,0) */
1608 if ((info->nMin > info->nMax) ||
1609 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1610 {
1611 infoPtr->minVal = 0;
1612 infoPtr->maxVal = 0;
1613 bChangeParams = TRUE;
1614 }
1615 else
1616 {
1617 if( infoPtr->minVal != info->nMin ||
1618 infoPtr->maxVal != info->nMax )
1619 {
1620 *action |= SA_SSI_REFRESH;
1621 infoPtr->minVal = info->nMin;
1622 infoPtr->maxVal = info->nMax;
1623 bChangeParams = TRUE;
1624 }
1625 }
1626 }
1627
1628 /* Make sure the page size is valid */
1629
1630 if (infoPtr->page < 0) infoPtr->page = 0;
1631 else if (infoPtr->page > infoPtr->maxVal - infoPtr->minVal + 1 )
1632 infoPtr->page = infoPtr->maxVal - infoPtr->minVal + 1;
1633
1634 /* Make sure the pos is inside the range */
1635
1636 if (infoPtr->curVal < infoPtr->minVal)
1637 infoPtr->curVal = infoPtr->minVal;
1638 else if (infoPtr->curVal > infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1639 infoPtr->curVal = infoPtr->maxVal - max( infoPtr->page-1, 0 );
1640
1641 TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1642 infoPtr->page, infoPtr->curVal,
1643 infoPtr->minVal, infoPtr->maxVal );
1644
1645 /* don't change the scrollbar state if SetScrollInfo
1646 * is just called with SIF_DISABLENOSCROLL
1647 */
1648 if(!(info->fMask & SIF_ALL)) goto done;
1649
1650 /* Check if the scrollbar should be hidden or disabled */
1651
1652 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1653 {
1654 new_flags = infoPtr->flags;
1655 if (infoPtr->minVal >= infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1656 {
1657 /* Hide or disable scroll-bar */
1658 if (info->fMask & SIF_DISABLENOSCROLL)
1659 {
1660 new_flags = ESB_DISABLE_BOTH;
1661 *action |= SA_SSI_REFRESH;
1662 }
1663 else if ((nBar != SB_CTL) && bChangeParams)
1664 {
1665 *action = SA_SSI_HIDE;
1666 goto done;
1667 }
1668 }
1669 else /* Show and enable scroll-bar */
1670 {
1671 new_flags = 0;
1672 if ((nBar != SB_CTL) && bChangeParams)
1673 *action |= SA_SSI_SHOW;
1674 }
1675
1676 if (infoPtr->flags != new_flags) /* check arrow flags */
1677 {
1678 infoPtr->flags = new_flags;
1679 *action |= SA_SSI_REPAINT_ARROWS;
1680 }
1681 }
1682
1683 done:
1684 /* Return current position */
1685
1686 return infoPtr->curVal;
1687 }
1688
1689
1690 /*************************************************************************
1691 * GetScrollInfo (USER32.@)
1692 *
1693 * GetScrollInfo can be used to retrieve the position, upper bound,
1694 * lower bound, and page size of a scrollbar control.
1695 *
1696 * RETURNS STD
1697 */
1698 BOOL WINAPI GetScrollInfo(
1699 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1700 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1701 LPSCROLLINFO info /* [in/out] (fMask specifies which values to retrieve) */)
1702 {
1703 TRACE("hwnd=%p nBar=%d info=%p\n", hwnd, nBar, info);
1704
1705 /* Refer SB_CTL requests to the window */
1706 if (nBar == SB_CTL)
1707 return SendMessageA(hwnd, SBM_GETSCROLLINFO, (WPARAM)0, (LPARAM)info);
1708 else
1709 return SCROLL_GetScrollInfo(hwnd, nBar, info);
1710 }
1711
1712
1713 /*************************************************************************
1714 * SetScrollPos (USER32.@)
1715 *
1716 * RETURNS
1717 * Success: Scrollbar position
1718 * Failure: 0
1719 *
1720 * REMARKS
1721 * Note the ambiguity when 0 is returned. Use GetLastError
1722 * to make sure there was an error (and to know which one).
1723 */
1724 INT WINAPI SetScrollPos(
1725 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1726 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1727 INT nPos /* [in] New value */,
1728 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */ )
1729 {
1730 SCROLLINFO info;
1731 SCROLLBAR_INFO *infoPtr;
1732 INT oldPos;
1733
1734 if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar ))) return 0;
1735 oldPos = infoPtr->curVal;
1736 info.cbSize = sizeof(info);
1737 info.nPos = nPos;
1738 info.fMask = SIF_POS;
1739 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1740 return oldPos;
1741 }
1742
1743
1744 /*************************************************************************
1745 * GetScrollPos (USER32.@)
1746 *
1747 * RETURNS
1748 * Success: Current position
1749 * Failure: 0
1750 *
1751 * REMARKS
1752 * There is ambiguity when 0 is returned. Use GetLastError
1753 * to make sure there was an error (and to know which one).
1754 */
1755 INT WINAPI GetScrollPos(
1756 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1757 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1758 {
1759 TRACE("hwnd=%p nBar=%d\n", hwnd, nBar);
1760
1761 /* Refer SB_CTL requests to the window */
1762 if (nBar == SB_CTL)
1763 return SendMessageA(hwnd, SBM_GETPOS, (WPARAM)0, (LPARAM)0);
1764 else
1765 return SCROLL_GetScrollPos(hwnd, nBar);
1766 }
1767
1768
1769 /*************************************************************************
1770 * SetScrollRange (USER32.@)
1771 *
1772 * RETURNS STD
1773 */
1774 BOOL WINAPI SetScrollRange(
1775 HWND hwnd, /* [in] Handle of window whose scrollbar will be affected */
1776 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1777 INT minVal, /* [in] New minimum value */
1778 INT maxVal, /* [in] New maximum value */
1779 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1780 {
1781 SCROLLINFO info;
1782
1783 info.cbSize = sizeof(info);
1784 info.nMin = minVal;
1785 info.nMax = maxVal;
1786 info.fMask = SIF_RANGE;
1787 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1788 return TRUE;
1789 }
1790
1791
1792 /*************************************************************************
1793 * SCROLL_SetNCSbState
1794 *
1795 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1796 */
1797 INT SCROLL_SetNCSbState(HWND hwnd, int vMin, int vMax, int vPos,
1798 int hMin, int hMax, int hPos)
1799 {
1800 INT vA, hA;
1801 SCROLLINFO vInfo, hInfo;
1802
1803 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1804 vInfo.nMin = vMin;
1805 vInfo.nMax = vMax;
1806 vInfo.nPos = vPos;
1807 hInfo.nMin = hMin;
1808 hInfo.nMax = hMax;
1809 hInfo.nPos = hPos;
1810 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1811
1812 SCROLL_SetScrollInfo( hwnd, SB_VERT, &vInfo, &vA );
1813 SCROLL_SetScrollInfo( hwnd, SB_HORZ, &hInfo, &hA );
1814
1815 if( !SCROLL_ShowScrollBar( hwnd, SB_BOTH,
1816 (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1817 {
1818 /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1819 if( vA & SA_SSI_REFRESH )
1820 SCROLL_RefreshScrollBar( hwnd, SB_VERT, FALSE, TRUE );
1821
1822 if( hA & SA_SSI_REFRESH )
1823 SCROLL_RefreshScrollBar( hwnd, SB_HORZ, FALSE, TRUE );
1824 }
1825 return 0;
1826 }
1827
1828
1829 /*************************************************************************
1830 * GetScrollRange (USER32.@)
1831 *
1832 * RETURNS STD
1833 */
1834 BOOL WINAPI GetScrollRange(
1835 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1836 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1837 LPINT lpMin /* [out] Where to store minimum value */,
1838 LPINT lpMax /* [out] Where to store maximum value */)
1839 {
1840 TRACE("hwnd=%p nBar=%d lpMin=%p lpMax=%p\n", hwnd, nBar, lpMin, lpMax);
1841
1842 /* Refer SB_CTL requests to the window */
1843 if (nBar == SB_CTL)
1844 return SendMessageA(hwnd, SBM_GETRANGE, (WPARAM)lpMin, (LPARAM)lpMax);
1845 else
1846 return SCROLL_GetScrollRange(hwnd, nBar, lpMin, lpMax);
1847 }
1848
1849
1850 /*************************************************************************
1851 * SCROLL_ShowScrollBar()
1852 *
1853 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1854 */
1855 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1856 BOOL fShowH, BOOL fShowV )
1857 {
1858 LONG style = GetWindowLongW( hwnd, GWL_STYLE );
1859
1860 TRACE("hwnd=%p bar=%d horz=%d, vert=%d\n", hwnd, nBar, fShowH, fShowV );
1861
1862 switch(nBar)
1863 {
1864 case SB_CTL:
1865 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1866 return TRUE;
1867
1868 case SB_BOTH:
1869 case SB_HORZ:
1870 if (fShowH)
1871 {
1872 fShowH = !(style & WS_HSCROLL);
1873 style |= WS_HSCROLL;
1874 }
1875 else /* hide it */
1876 {
1877 fShowH = (style & WS_HSCROLL);
1878 style &= ~WS_HSCROLL;
1879 }
1880 if( nBar == SB_HORZ ) {
1881 fShowV = FALSE;
1882 break;
1883 }
1884 /* fall through */
1885
1886 case SB_VERT:
1887 if (fShowV)
1888 {
1889 fShowV = !(style & WS_VSCROLL);
1890 style |= WS_VSCROLL;
1891 }
1892 else /* hide it */
1893 {
1894 fShowV = (style & WS_VSCROLL);
1895 style &= ~WS_VSCROLL;
1896 }
1897 if ( nBar == SB_VERT )
1898 fShowH = FALSE;
1899 break;
1900
1901 default:
1902 return FALSE; /* Nothing to do! */
1903 }
1904
1905 if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1906 {
1907 WIN_SetStyle( hwnd, style );
1908 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1909 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1910 return TRUE;
1911 }
1912 return FALSE; /* no frame changes */
1913 }
1914
1915
1916 /*************************************************************************
1917 * ShowScrollBar (USER32.@)
1918 *
1919 * RETURNS STD
1920 */
1921 BOOL WINAPI ShowScrollBar(
1922 HWND hwnd, /* [in] Handle of window whose scrollbar(s) will be affected */
1923 INT nBar, /* [in] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1924 BOOL fShow /* [in] TRUE = show, FALSE = hide */)
1925 {
1926 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1927 (nBar == SB_HORZ) ? 0 : fShow );
1928 return TRUE;
1929 }
1930
1931
1932 /*************************************************************************
1933 * EnableScrollBar (USER32.@)
1934 */
1935 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1936 {
1937 BOOL bFineWithMe;
1938 SCROLLBAR_INFO *infoPtr;
1939
1940 TRACE("%p %d %d\n", hwnd, nBar, flags );
1941
1942 flags &= ESB_DISABLE_BOTH;
1943
1944 if (nBar == SB_BOTH)
1945 {
1946 if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, SB_VERT ))) return FALSE;
1947 if (!(bFineWithMe = (infoPtr->flags == flags)) )
1948 {
1949 infoPtr->flags = flags;
1950 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1951 }
1952 nBar = SB_HORZ;
1953 }
1954 else
1955 bFineWithMe = TRUE;
1956
1957 if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar ))) return FALSE;
1958 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1959 infoPtr->flags = flags;
1960
1961 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1962 return TRUE;
1963 }
Maarten's multimedia branch