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Updated to latest version's exports, and added a few more forwards.
[wine.git] / controls / scroll.c
blob9400759b144a684f70f05902011c9ba08426e59a
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 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_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( 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_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
466 INT arrowSize, INT thumbSize )
467 {
468 INT pos = SCROLL_TrackingPos;
469 INT max_size;
470
471 if( vertical )
472 max_size = rect->bottom - rect->top;
473 else
474 max_size = rect->right - rect->left;
475
476 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
477
478 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
479 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
480 else if( pos > max_size )
481 pos = max_size;
482
483 SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
484 rect, arrowSize, thumbSize, pos,
485 0, vertical, FALSE, FALSE );
486
487 SCROLL_MovingThumb = !SCROLL_MovingThumb;
488 }
489
490 /***********************************************************************
491 * SCROLL_DrawInterior
492 *
493 * Draw the scroll bar interior (everything except the arrows).
494 */
495 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
496 RECT *rect, INT arrowSize,
497 INT thumbSize, INT thumbPos,
498 UINT flags, BOOL vertical,
499 BOOL top_selected, BOOL bottom_selected )
500 {
501 RECT r;
502 HPEN hSavePen;
503 HBRUSH hSaveBrush,hBrush;
504
505 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
506 * The window-owned scrollbars need to call DEFWND_ControlColor
507 * to correctly setup default scrollbar colors
508 */
509 if (nBar == SB_CTL)
510 {
511 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
512 (WPARAM)hdc,(LPARAM)hwnd);
513 }
514 else
515 {
516 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
517 }
518
519 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
520 hSaveBrush = SelectObject( hdc, hBrush );
521
522 /* Calculate the scroll rectangle */
523 r = *rect;
524 if (vertical)
525 {
526 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
527 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
528 }
529 else
530 {
531 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
532 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
533 }
534
535 /* Draw the scroll rectangles and thumb */
536 if (!thumbPos) /* No thumb to draw */
537 {
538 PatBlt( hdc, r.left, r.top,
539 r.right - r.left, r.bottom - r.top,
540 PATCOPY );
541
542 /* cleanup and return */
543 SelectObject( hdc, hSavePen );
544 SelectObject( hdc, hSaveBrush );
545 return;
546 }
547
548 if (vertical)
549 {
550 PatBlt( hdc, r.left, r.top,
551 r.right - r.left,
552 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
553 top_selected ? 0x0f0000 : PATCOPY );
554 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
555 PatBlt( hdc, r.left, r.top + thumbSize,
556 r.right - r.left,
557 r.bottom - r.top - thumbSize,
558 bottom_selected ? 0x0f0000 : PATCOPY );
559 r.bottom = r.top + thumbSize;
560 }
561 else /* horizontal */
562 {
563 PatBlt( hdc, r.left, r.top,
564 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
565 r.bottom - r.top,
566 top_selected ? 0x0f0000 : PATCOPY );
567 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
568 PatBlt( hdc, r.left + thumbSize, r.top,
569 r.right - r.left - thumbSize,
570 r.bottom - r.top,
571 bottom_selected ? 0x0f0000 : PATCOPY );
572 r.right = r.left + thumbSize;
573 }
574
575 /* Draw the thumb */
576 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
577
578 /* cleanup */
579 SelectObject( hdc, hSavePen );
580 SelectObject( hdc, hSaveBrush );
581 }
582
583
584 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
585 RECT *rect, INT arrowSize,
586 INT thumbSize, INT thumbPos,
587 UINT flags, BOOL vertical,
588 BOOL top_selected, BOOL bottom_selected )
589 {
590 RECT r;
591 HPEN hSavePen;
592 HBRUSH hSaveBrush,hBrush;
593 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
594
595 if (Save_SCROLL_MovingThumb &&
596 (SCROLL_TrackingWin == hwnd) &&
597 (SCROLL_TrackingBar == nBar))
598 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
599
600 /* Select the correct brush and pen */
601
602 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
603 * The window-owned scrollbars need to call DEFWND_ControlColor
604 * to correctly setup default scrollbar colors
605 */
606 if (nBar == SB_CTL) {
607 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
608 (WPARAM)hdc,(LPARAM)hwnd);
609 } else {
610 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
611 }
612 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
613 hSaveBrush = SelectObject( hdc, hBrush );
614
615 /* Calculate the scroll rectangle */
616
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 bar frame */
630
631 /* Draw the scroll rectangles and thumb */
632
633 if (!thumbPos) /* No thumb to draw */
634 {
635 PatBlt( hdc, r.left, r.top, r.right - r.left, r.bottom - r.top, PATCOPY );
636
637 /* cleanup and return */
638 SelectObject( hdc, hSavePen );
639 SelectObject( hdc, hSaveBrush );
640 return;
641 }
642
643 if (vertical)
644 {
645 PatBlt( hdc, r.left, r.top, 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, r.right - r.left,
650 r.bottom - r.top - thumbSize,
651 bottom_selected ? 0x0f0000 : PATCOPY );
652 r.bottom = r.top + thumbSize;
653 }
654 else /* horizontal */
655 {
656 PatBlt( hdc, r.left, r.top,
657 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
658 r.bottom - r.top, top_selected ? 0x0f0000 : PATCOPY );
659 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
660 PatBlt( hdc, r.left + thumbSize, r.top, r.right - r.left - thumbSize,
661 r.bottom - r.top, bottom_selected ? 0x0f0000 : PATCOPY );
662 r.right = r.left + thumbSize;
663 }
664
665 /* Draw the thumb */
666
667 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
668 Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
669 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
670
671 if (Save_SCROLL_MovingThumb &&
672 (SCROLL_TrackingWin == hwnd) &&
673 (SCROLL_TrackingBar == nBar))
674 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
675
676 /* cleanup */
677 SelectObject( hdc, hSavePen );
678 SelectObject( hdc, hSaveBrush );
679 }
680
681
682 /***********************************************************************
683 * SCROLL_DrawScrollBar
684 *
685 * Redraw the whole scrollbar.
686 */
687 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
688 BOOL arrows, BOOL interior )
689 {
690 INT arrowSize, thumbSize, thumbPos;
691 RECT rect;
692 BOOL vertical;
693 WND *wndPtr = WIN_FindWndPtr( hwnd );
694 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar );
695 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
696
697 if (!wndPtr || !infoPtr ||
698 ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
699 ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
700 if (!WIN_IsWindowDrawable( hwnd, FALSE )) goto END;
701 hwnd = wndPtr->hwndSelf; /* make it a full handle */
702
703 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
704 &arrowSize, &thumbSize, &thumbPos );
705
706 /* do not draw if the scrollbar rectangle is empty */
707 if(IsRectEmpty(&rect))
708 goto END;
709
710 if (Save_SCROLL_MovingThumb &&
711 (SCROLL_TrackingWin == hwnd) &&
712 (SCROLL_TrackingBar == nBar))
713 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
714
715 /* Draw the arrows */
716
717 if (arrows && arrowSize)
718 {
719 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
720 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
721 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
722 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
723 else
724 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
725 FALSE, FALSE );
726 }
727 if( interior )
728 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
729 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
730
731 if (Save_SCROLL_MovingThumb &&
732 (SCROLL_TrackingWin == hwnd) &&
733 (SCROLL_TrackingBar == nBar))
734 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
735
736 /* if scroll bar has focus, reposition the caret */
737 if(hwnd==GetFocus() && (nBar==SB_CTL))
738 {
739 if (!vertical)
740 {
741 SetCaretPos(thumbPos+1, rect.top+1);
742 }
743 else
744 {
745 SetCaretPos(rect.top+1, thumbPos+1);
746 }
747 }
748
749 END:
750 WIN_ReleaseWndPtr(wndPtr);
751 }
752
753 /***********************************************************************
754 * SCROLL_DrawSizeGrip
755 *
756 * Draw the size grip.
757 */
758 static void SCROLL_DrawSizeGrip( HWND hwnd, HDC hdc)
759 {
760 RECT rc;
761
762 GetClientRect( hwnd, &rc );
763 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
764 rc.left = max( rc.left, rc.right - GetSystemMetrics(SM_CXVSCROLL) - 1 );
765 rc.top = max( rc.top, rc.bottom - GetSystemMetrics(SM_CYHSCROLL) - 1 );
766 DrawFrameControl( hdc, &rc, DFC_SCROLL, DFCS_SCROLLSIZEGRIP );
767 }
768
769
770 /***********************************************************************
771 * SCROLL_RefreshScrollBar
772 *
773 * Repaint the scroll bar interior after a SetScrollRange() or
774 * SetScrollPos() call.
775 */
776 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
777 BOOL arrows, BOOL interior )
778 {
779 HDC hdc = GetDCEx( hwnd, 0,
780 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
781 if (!hdc) return;
782
783 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
784 ReleaseDC( hwnd, hdc );
785 }
786
787
788 /***********************************************************************
789 * SCROLL_HandleKbdEvent
790 *
791 * Handle a keyboard event (only for SB_CTL scrollbars with focus).
792 */
793 static void SCROLL_HandleKbdEvent(
794 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
795 WPARAM wParam /* [in] Variable input including enable state */,
796 LPARAM lParam /* [in] Variable input including input point */)
797 {
798 TRACE("hwnd=%p wParam=%d lParam=%ld\n", hwnd, wParam, lParam);
799
800 /* hide caret on first KEYDOWN to prevent flicker */
801 if ((lParam & PFD_DOUBLEBUFFER_DONTCARE) == 0)
802 HideCaret(hwnd);
803
804 switch(wParam)
805 {
806 case VK_PRIOR: wParam = SB_PAGEUP; break;
807 case VK_NEXT: wParam = SB_PAGEDOWN; break;
808 case VK_HOME: wParam = SB_TOP; break;
809 case VK_END: wParam = SB_BOTTOM; break;
810 case VK_UP: wParam = SB_LINEUP; break;
811 case VK_DOWN: wParam = SB_LINEDOWN; break;
812 default: return;
813 }
814 SendMessageW(GetParent(hwnd),
815 ((GetWindowLongA( hwnd, GWL_STYLE ) & SBS_VERT) ?
816 WM_VSCROLL : WM_HSCROLL), wParam, (LPARAM)hwnd);
817 }
818
819
820 /***********************************************************************
821 * SCROLL_HandleScrollEvent
822 *
823 * Handle a mouse or timer event for the scrollbar.
824 * 'pt' is the location of the mouse event in client (for SB_CTL) or
825 * windows coordinates.
826 */
827 static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
828 {
829 /* Previous mouse position for timer events */
830 static POINT prevPt;
831 /* Thumb position when tracking started. */
832 static UINT trackThumbPos;
833 /* Position in the scroll-bar of the last button-down event. */
834 static INT lastClickPos;
835 /* Position in the scroll-bar of the last mouse event. */
836 static INT lastMousePos;
837
838 enum SCROLL_HITTEST hittest;
839 HWND hwndOwner, hwndCtl;
840 BOOL vertical;
841 INT arrowSize, thumbSize, thumbPos;
842 RECT rect;
843 HDC hdc;
844
845 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar );
846 if (!infoPtr) return;
847 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
848 return;
849
850 if (nBar == SB_CTL && (GetWindowLongW( hwnd, GWL_STYLE ) & (SBS_SIZEGRIP | SBS_SIZEBOX)))
851 {
852 switch(msg)
853 {
854 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
855 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
856 SetCapture( hwnd );
857 prevPt = pt;
858 SCROLL_trackHitTest = hittest = SCROLL_THUMB;
859 break;
860 case WM_MOUSEMOVE:
861 GetClientRect(GetParent(GetParent(hwnd)),&rect);
862 prevPt = pt;
863 break;
864 case WM_LBUTTONUP:
865 ReleaseCapture();
866 SCROLL_trackHitTest = hittest = SCROLL_NOWHERE;
867 if (hwnd==GetFocus()) ShowCaret(hwnd);
868 break;
869 case WM_SYSTIMER:
870 pt = prevPt;
871 break;
872 }
873 return;
874 }
875
876 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
877 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
878 &arrowSize, &thumbSize, &thumbPos );
879 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
880 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
881
882 switch(msg)
883 {
884 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
885 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
886 SCROLL_trackVertical = vertical;
887 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
888 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
889 lastMousePos = lastClickPos;
890 trackThumbPos = thumbPos;
891 prevPt = pt;
892 if (nBar == SB_CTL && (GetWindowLongA(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
893 SetCapture( hwnd );
894 break;
895
896 case WM_MOUSEMOVE:
897 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
898 prevPt = pt;
899 break;
900
901 case WM_LBUTTONUP:
902 hittest = SCROLL_NOWHERE;
903 ReleaseCapture();
904 /* if scrollbar has focus, show back caret */
905 if (hwnd==GetFocus()) ShowCaret(hwnd);
906 break;
907
908 case WM_SYSTIMER:
909 pt = prevPt;
910 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
911 break;
912
913 default:
914 return; /* Should never happen */
915 }
916
917 TRACE("Event: hwnd=%p bar=%d msg=%s pt=%ld,%ld hit=%d\n",
918 hwnd, nBar, SPY_GetMsgName(msg,hwnd), pt.x, pt.y, hittest );
919
920 switch(SCROLL_trackHitTest)
921 {
922 case SCROLL_NOWHERE: /* No tracking in progress */
923 break;
924
925 case SCROLL_TOP_ARROW:
926 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
927 (hittest == SCROLL_trackHitTest), FALSE );
928 if (hittest == SCROLL_trackHitTest)
929 {
930 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
931 {
932 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
933 SB_LINEUP, (LPARAM)hwndCtl );
934 }
935
936 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
937 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
938 (TIMERPROC)0 );
939 }
940 else KillSystemTimer( hwnd, SCROLL_TIMER );
941 break;
942
943 case SCROLL_TOP_RECT:
944 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
945 thumbPos, infoPtr->flags, vertical,
946 (hittest == SCROLL_trackHitTest), FALSE );
947 if (hittest == SCROLL_trackHitTest)
948 {
949 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
950 {
951 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
952 SB_PAGEUP, (LPARAM)hwndCtl );
953 }
954 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
955 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
956 (TIMERPROC)0 );
957 }
958 else KillSystemTimer( hwnd, SCROLL_TIMER );
959 break;
960
961 case SCROLL_THUMB:
962 if (msg == WM_LBUTTONDOWN)
963 {
964 SCROLL_TrackingWin = hwnd;
965 SCROLL_TrackingBar = nBar;
966 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
967 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
968 vertical,
969 SCROLL_TrackingPos );
970 if (!SCROLL_MovingThumb)
971 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
972 }
973 else if (msg == WM_LBUTTONUP)
974 {
975 if (SCROLL_MovingThumb)
976 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
977 SCROLL_TrackingWin = 0;
978 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
979 thumbPos, infoPtr->flags, vertical,
980 FALSE, FALSE );
981 }
982 else /* WM_MOUSEMOVE */
983 {
984 UINT pos;
985
986 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
987 else
988 {
989 pt = SCROLL_ClipPos( &rect, pt );
990 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
991 }
992 if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
993 {
994 if (SCROLL_MovingThumb)
995 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
996 arrowSize, thumbSize );
997 lastMousePos = pos;
998 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
999 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1000 vertical,
1001 SCROLL_TrackingPos );
1002 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1003 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1004 (LPARAM)hwndCtl );
1005 if (!SCROLL_MovingThumb)
1006 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1007 arrowSize, thumbSize );
1008 }
1009 }
1010 break;
1011
1012 case SCROLL_BOTTOM_RECT:
1013 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1014 thumbPos, infoPtr->flags, vertical,
1015 FALSE, (hittest == SCROLL_trackHitTest) );
1016 if (hittest == SCROLL_trackHitTest)
1017 {
1018 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1019 {
1020 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1021 SB_PAGEDOWN, (LPARAM)hwndCtl );
1022 }
1023 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1024 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1025 (TIMERPROC)0 );
1026 }
1027 else KillSystemTimer( hwnd, SCROLL_TIMER );
1028 break;
1029
1030 case SCROLL_BOTTOM_ARROW:
1031 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1032 FALSE, (hittest == SCROLL_trackHitTest) );
1033 if (hittest == SCROLL_trackHitTest)
1034 {
1035 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1036 {
1037 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1038 SB_LINEDOWN, (LPARAM)hwndCtl );
1039 }
1040
1041 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1042 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1043 (TIMERPROC)0 );
1044 }
1045 else KillSystemTimer( hwnd, SCROLL_TIMER );
1046 break;
1047 }
1048
1049 if (msg == WM_LBUTTONDOWN)
1050 {
1051
1052 if (hittest == SCROLL_THUMB)
1053 {
1054 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1055 trackThumbPos + lastMousePos - lastClickPos );
1056 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1057 MAKEWPARAM( SB_THUMBTRACK, val ), (LPARAM)hwndCtl );
1058 }
1059 }
1060
1061 if (msg == WM_LBUTTONUP)
1062 {
1063 hittest = SCROLL_trackHitTest;
1064 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1065
1066 if (hittest == SCROLL_THUMB)
1067 {
1068 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1069 trackThumbPos + lastMousePos - lastClickPos );
1070 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1071 MAKEWPARAM( SB_THUMBPOSITION, val ), (LPARAM)hwndCtl );
1072 }
1073 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1074 SB_ENDSCROLL, (LPARAM)hwndCtl );
1075 }
1076
1077 ReleaseDC( hwnd, hdc );
1078 }
1079
1080
1081 /***********************************************************************
1082 * SCROLL_TrackScrollBar
1083 *
1084 * Track a mouse button press on a scroll-bar.
1085 * pt is in screen-coordinates for non-client scroll bars.
1086 */
1087 void SCROLL_TrackScrollBar( HWND hwnd, INT scrollbar, POINT pt )
1088 {
1089 MSG msg;
1090 INT xoffset = 0, yoffset = 0;
1091
1092 if (scrollbar != SB_CTL)
1093 {
1094 WND *wndPtr = WIN_GetPtr( hwnd );
1095 if (!wndPtr || wndPtr == WND_OTHER_PROCESS) return;
1096 xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
1097 yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
1098 WIN_ReleasePtr( wndPtr );
1099 ScreenToClient( hwnd, &pt );
1100 pt.x += xoffset;
1101 pt.y += yoffset;
1102 }
1103
1104 SCROLL_HandleScrollEvent( hwnd, scrollbar, WM_LBUTTONDOWN, pt );
1105
1106 do
1107 {
1108 if (!GetMessageW( &msg, 0, 0, 0 )) break;
1109 if (CallMsgFilterW( &msg, MSGF_SCROLLBAR )) continue;
1110 switch(msg.message)
1111 {
1112 case WM_LBUTTONUP:
1113 case WM_MOUSEMOVE:
1114 case WM_SYSTIMER:
1115 pt.x = (short)LOWORD(msg.lParam) + xoffset;
1116 pt.y = (short)HIWORD(msg.lParam) + yoffset;
1117 SCROLL_HandleScrollEvent( hwnd, scrollbar, msg.message, pt );
1118 break;
1119 default:
1120 TranslateMessage( &msg );
1121 DispatchMessageW( &msg );
1122 break;
1123 }
1124 if (!IsWindow( hwnd ))
1125 {
1126 ReleaseCapture();
1127 break;
1128 }
1129 } while (msg.message != WM_LBUTTONUP);
1130 }
1131
1132
1133 /***********************************************************************
1134 * SCROLL_CreateScrollBar
1135 *
1136 * Create a scroll bar
1137 */
1138 static void SCROLL_CreateScrollBar(
1139 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1140 LPCREATESTRUCTW lpCreate /* [in] The style and place of the scroll bar */)
1141 {
1142 LPSCROLLBAR_INFO info = SCROLL_GetScrollBarInfo(hwnd, SB_CTL);
1143 if (!info) return;
1144
1145 TRACE("hwnd=%p lpCreate=%p\n", hwnd, lpCreate);
1146
1147 if (lpCreate->style & WS_DISABLED)
1148 {
1149 info->flags = ESB_DISABLE_BOTH;
1150 TRACE("Created WS_DISABLED scrollbar\n");
1151 }
1152
1153
1154 if (lpCreate->style & (SBS_SIZEGRIP | SBS_SIZEBOX))
1155 {
1156 if (lpCreate->style & SBS_SIZEBOXTOPLEFTALIGN)
1157 MoveWindow( hwnd, lpCreate->x, lpCreate->y, GetSystemMetrics(SM_CXVSCROLL)+1,
1158 GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1159 else if(lpCreate->style & SBS_SIZEBOXBOTTOMRIGHTALIGN)
1160 MoveWindow( hwnd, lpCreate->x+lpCreate->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1161 lpCreate->y+lpCreate->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1162 GetSystemMetrics(SM_CXVSCROLL)+1,
1163 GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1164 }
1165 else if (lpCreate->style & SBS_VERT)
1166 {
1167 if (lpCreate->style & SBS_LEFTALIGN)
1168 MoveWindow( hwnd, lpCreate->x, lpCreate->y,
1169 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreate->cy, FALSE );
1170 else if (lpCreate->style & SBS_RIGHTALIGN)
1171 MoveWindow( hwnd,
1172 lpCreate->x+lpCreate->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1173 lpCreate->y,
1174 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreate->cy, FALSE );
1175 }
1176 else /* SBS_HORZ */
1177 {
1178 if (lpCreate->style & SBS_TOPALIGN)
1179 MoveWindow( hwnd, lpCreate->x, lpCreate->y,
1180 lpCreate->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1181 else if (lpCreate->style & SBS_BOTTOMALIGN)
1182 MoveWindow( hwnd,
1183 lpCreate->x,
1184 lpCreate->y+lpCreate->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1185 lpCreate->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1186 }
1187 }
1188
1189
1190 /*************************************************************************
1191 * SCROLL_GetScrollInfo
1192 *
1193 * Internal helper for the API function
1194 */
1195 static BOOL SCROLL_GetScrollInfo(
1196 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1197 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1198 LPSCROLLINFO info /* [in/out] (fMask specifies which values to retrieve) */)
1199 {
1200 LPSCROLLBAR_INFO infoPtr;
1201
1202 /* handle invalid data structure */
1203 if (!SCROLL_ScrollInfoValid(info)
1204 || !(infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar)))
1205 return FALSE;
1206
1207 /* fill in the desired scroll info structure */
1208 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->page;
1209 if (info->fMask & SIF_POS) info->nPos = infoPtr->curVal;
1210 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1211 info->nTrackPos = (SCROLL_TrackingWin == WIN_GetFullHandle(hwnd)) ? SCROLL_TrackingVal : infoPtr->curVal;
1212 if (info->fMask & SIF_RANGE)
1213 {
1214 info->nMin = infoPtr->minVal;
1215 info->nMax = infoPtr->maxVal;
1216 }
1217
1218 return (info->fMask & SIF_ALL) != 0;
1219 }
1220
1221
1222 /*************************************************************************
1223 * SCROLL_GetScrollPos
1224 *
1225 * Internal helper for the API function
1226 */
1227 static INT SCROLL_GetScrollPos(
1228 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1229 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1230 {
1231 LPSCROLLBAR_INFO infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar);
1232 return infoPtr ? infoPtr->curVal: 0;
1233 }
1234
1235
1236 /*************************************************************************
1237 * SCROLL_GetScrollRange
1238 *
1239 * Internal helper for the API function
1240 *
1241 * RETURNS STD
1242 */
1243 static BOOL SCROLL_GetScrollRange(
1244 HWND hwnd, /* [in] Handle of window */
1245 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1246 LPINT lpMin, /* [out] Where to store minimum value */
1247 LPINT lpMax /* [out] Where to store maximum value */)
1248 {
1249 LPSCROLLBAR_INFO infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar);
1250
1251 if (lpMin) *lpMin = infoPtr ? infoPtr->minVal : 0;
1252 if (lpMax) *lpMax = infoPtr ? infoPtr->maxVal : 0;
1253
1254 return infoPtr ? TRUE : FALSE;
1255 }
1256
1257
1258
1259 /***********************************************************************
1260 * ScrollBarWndProc
1261 */
1262 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1263 {
1264 if (!IsWindow( hwnd )) return 0;
1265
1266 switch(message)
1267 {
1268 case WM_CREATE:
1269 SCROLL_CreateScrollBar(hwnd, (LPCREATESTRUCTW)lParam);
1270 if (!hUpArrow) SCROLL_LoadBitmaps();
1271 break;
1272
1273 case WM_ENABLE:
1274 {
1275 SCROLLBAR_INFO *infoPtr;
1276 if ((infoPtr = SCROLL_GetScrollBarInfo( hwnd, SB_CTL )))
1277 {
1278 infoPtr->flags = wParam ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH;
1279 SCROLL_RefreshScrollBar(hwnd, SB_CTL, TRUE, TRUE);
1280 }
1281 }
1282 return 0;
1283
1284 case WM_LBUTTONDBLCLK:
1285 case WM_LBUTTONDOWN:
1286 {
1287 POINT pt;
1288 pt.x = (short)LOWORD(lParam);
1289 pt.y = (short)HIWORD(lParam);
1290 SCROLL_TrackScrollBar( hwnd, SB_CTL, pt );
1291 }
1292 break;
1293 case WM_LBUTTONUP:
1294 case WM_MOUSEMOVE:
1295 case WM_SYSTIMER:
1296 {
1297 POINT pt;
1298 pt.x = (short)LOWORD(lParam);
1299 pt.y = (short)HIWORD(lParam);
1300 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1301 }
1302 break;
1303
1304 case WM_KEYDOWN:
1305 SCROLL_HandleKbdEvent(hwnd, wParam, lParam);
1306 break;
1307
1308 case WM_KEYUP:
1309 ShowCaret(hwnd);
1310 break;
1311
1312 case WM_SETFOCUS:
1313 {
1314 /* Create a caret when a ScrollBar get focus */
1315 RECT rect;
1316 int arrowSize, thumbSize, thumbPos, vertical;
1317 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1318 &arrowSize, &thumbSize, &thumbPos );
1319 if (!vertical)
1320 {
1321 CreateCaret(hwnd, (HBITMAP)1, thumbSize-2, rect.bottom-rect.top-2);
1322 SetCaretPos(thumbPos+1, rect.top+1);
1323 }
1324 else
1325 {
1326 CreateCaret(hwnd, (HBITMAP)1, rect.right-rect.left-2,thumbSize-2);
1327 SetCaretPos(rect.top+1, thumbPos+1);
1328 }
1329 ShowCaret(hwnd);
1330 }
1331 break;
1332
1333 case WM_KILLFOCUS:
1334 {
1335 RECT rect;
1336 int arrowSize, thumbSize, thumbPos, vertical;
1337 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1338 if (!vertical){
1339 rect.left=thumbPos+1;
1340 rect.right=rect.left+thumbSize;
1341 }
1342 else
1343 {
1344 rect.top=thumbPos+1;
1345 rect.bottom=rect.top+thumbSize;
1346 }
1347 HideCaret(hwnd);
1348 InvalidateRect(hwnd,&rect,0);
1349 DestroyCaret();
1350 }
1351 break;
1352
1353 case WM_ERASEBKGND:
1354 return 1;
1355
1356 case WM_GETDLGCODE:
1357 return DLGC_WANTARROWS; /* Windows returns this value */
1358
1359 case WM_PAINT:
1360 {
1361 PAINTSTRUCT ps;
1362 HDC hdc = wParam ? (HDC)wParam : BeginPaint(hwnd, &ps);
1363 if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEGRIP)
1364 {
1365 SCROLL_DrawSizeGrip( hwnd, hdc);
1366 }
1367 else if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEBOX)
1368 {
1369 RECT rc;
1370 GetClientRect( hwnd, &rc );
1371 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
1372 }
1373 else
1374 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1375 if (!wParam) EndPaint(hwnd, &ps);
1376 }
1377 break;
1378
1379 case SBM_SETPOS16:
1380 case SBM_SETPOS:
1381 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1382
1383 case SBM_GETPOS16:
1384 case SBM_GETPOS:
1385 return SCROLL_GetScrollPos(hwnd, SB_CTL);
1386
1387 case SBM_SETRANGE16:
1388 SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
1389 wParam /* FIXME: Is this correct? */ );
1390 return 0;
1391
1392 case SBM_SETRANGE:
1393 {
1394 INT oldPos = SCROLL_GetScrollPos( hwnd, SB_CTL );
1395 SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
1396 if (oldPos != SCROLL_GetScrollPos( hwnd, SB_CTL )) return oldPos;
1397 }
1398 return 0;
1399
1400 case SBM_GETRANGE16:
1401 FIXME("don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
1402 return 0;
1403
1404 case SBM_GETRANGE:
1405 return SCROLL_GetScrollRange(hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam);
1406
1407 case SBM_ENABLE_ARROWS16:
1408 case SBM_ENABLE_ARROWS:
1409 return EnableScrollBar( hwnd, SB_CTL, wParam );
1410
1411 case SBM_SETRANGEREDRAW:
1412 {
1413 INT oldPos = SCROLL_GetScrollPos( hwnd, SB_CTL );
1414 SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
1415 if (oldPos != SCROLL_GetScrollPos( hwnd, SB_CTL )) return oldPos;
1416 }
1417 return 0;
1418
1419 case SBM_SETSCROLLINFO:
1420 return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1421
1422 case SBM_GETSCROLLINFO:
1423 return SCROLL_GetScrollInfo(hwnd, SB_CTL, (SCROLLINFO *)lParam);
1424
1425 case 0x00e5:
1426 case 0x00e7:
1427 case 0x00e8:
1428 case 0x00eb:
1429 case 0x00ec:
1430 case 0x00ed:
1431 case 0x00ee:
1432 case 0x00ef:
1433 ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1434 message, wParam, lParam );
1435 break;
1436
1437 default:
1438 if (message >= WM_USER)
1439 WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1440 message, wParam, lParam );
1441 return DefWindowProcW( hwnd, message, wParam, lParam );
1442 }
1443 return 0;
1444 }
1445
1446
1447 /*************************************************************************
1448 * SetScrollInfo (USER32.@)
1449 * SetScrollInfo can be used to set the position, upper bound,
1450 * lower bound, and page size of a scrollbar control.
1451 *
1452 * RETURNS
1453 * Scrollbar position
1454 *
1455 * NOTE
1456 * For 100 lines of text to be displayed in a window of 25 lines,
1457 * one would for instance use info->nMin=0, info->nMax=75
1458 * (corresponding to the 76 different positions of the window on
1459 * the text), and info->nPage=25.
1460 */
1461 INT WINAPI SetScrollInfo(
1462 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1463 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1464 const SCROLLINFO *info /* [in] Specifies what to change and new values */,
1465 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1466 {
1467 INT action;
1468 INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1469
1470 if( action & SA_SSI_HIDE )
1471 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1472 else
1473 {
1474 if( action & SA_SSI_SHOW )
1475 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1476 return retVal; /* SetWindowPos() already did the painting */
1477
1478 if( bRedraw )
1479 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1480 else if( action & SA_SSI_REPAINT_ARROWS )
1481 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1482 }
1483 return retVal;
1484 }
1485
1486 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1487 const SCROLLINFO *info, INT *action )
1488 {
1489 /* Update the scrollbar state and set action flags according to
1490 * what has to be done graphics wise. */
1491
1492 SCROLLBAR_INFO *infoPtr;
1493 UINT new_flags;
1494 BOOL bChangeParams = FALSE; /* don't show/hide scrollbar if params don't change */
1495
1496 *action = 0;
1497
1498 if (!(infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar))) return 0;
1499 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1500 if ((info->cbSize != sizeof(*info)) &&
1501 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1502
1503 if (TRACE_ON(scroll))
1504 {
1505 TRACE("hwnd=%p bar=%d", hwnd, nBar);
1506 if (info->fMask & SIF_PAGE) TRACE( " page=%d", info->nPage );
1507 if (info->fMask & SIF_POS) TRACE( " pos=%d", info->nPos );
1508 if (info->fMask & SIF_RANGE) TRACE( " min=%d max=%d", info->nMin, info->nMax );
1509 TRACE("\n");
1510 }
1511
1512 /* Set the page size */
1513
1514 if (info->fMask & SIF_PAGE)
1515 {
1516 if( infoPtr->page != info->nPage )
1517 {
1518 infoPtr->page = info->nPage;
1519 *action |= SA_SSI_REFRESH;
1520 bChangeParams = TRUE;
1521 }
1522 }
1523
1524 /* Set the scroll pos */
1525
1526 if (info->fMask & SIF_POS)
1527 {
1528 if( infoPtr->curVal != info->nPos )
1529 {
1530 infoPtr->curVal = info->nPos;
1531 *action |= SA_SSI_REFRESH;
1532 }
1533 }
1534
1535 /* Set the scroll range */
1536
1537 if (info->fMask & SIF_RANGE)
1538 {
1539 /* Invalid range -> range is set to (0,0) */
1540 if ((info->nMin > info->nMax) ||
1541 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1542 {
1543 infoPtr->minVal = 0;
1544 infoPtr->maxVal = 0;
1545 bChangeParams = TRUE;
1546 }
1547 else
1548 {
1549 if( infoPtr->minVal != info->nMin ||
1550 infoPtr->maxVal != info->nMax )
1551 {
1552 *action |= SA_SSI_REFRESH;
1553 infoPtr->minVal = info->nMin;
1554 infoPtr->maxVal = info->nMax;
1555 bChangeParams = TRUE;
1556 }
1557 }
1558 }
1559
1560 /* Make sure the page size is valid */
1561
1562 if (infoPtr->page < 0) infoPtr->page = 0;
1563 else if (infoPtr->page > infoPtr->maxVal - infoPtr->minVal + 1 )
1564 infoPtr->page = infoPtr->maxVal - infoPtr->minVal + 1;
1565
1566 /* Make sure the pos is inside the range */
1567
1568 if (infoPtr->curVal < infoPtr->minVal)
1569 infoPtr->curVal = infoPtr->minVal;
1570 else if (infoPtr->curVal > infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1571 infoPtr->curVal = infoPtr->maxVal - max( infoPtr->page-1, 0 );
1572
1573 TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1574 infoPtr->page, infoPtr->curVal,
1575 infoPtr->minVal, infoPtr->maxVal );
1576
1577 /* don't change the scrollbar state if SetScrollInfo
1578 * is just called with SIF_DISABLENOSCROLL
1579 */
1580 if(!(info->fMask & SIF_ALL)) goto done;
1581
1582 /* Check if the scrollbar should be hidden or disabled */
1583
1584 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1585 {
1586 new_flags = infoPtr->flags;
1587 if (infoPtr->minVal >= infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1588 {
1589 /* Hide or disable scroll-bar */
1590 if (info->fMask & SIF_DISABLENOSCROLL)
1591 {
1592 new_flags = ESB_DISABLE_BOTH;
1593 *action |= SA_SSI_REFRESH;
1594 }
1595 else if ((nBar != SB_CTL) && bChangeParams)
1596 {
1597 *action = SA_SSI_HIDE;
1598 goto done;
1599 }
1600 }
1601 else /* Show and enable scroll-bar */
1602 {
1603 new_flags = 0;
1604 if ((nBar != SB_CTL) && bChangeParams)
1605 *action |= SA_SSI_SHOW;
1606 }
1607
1608 if (infoPtr->flags != new_flags) /* check arrow flags */
1609 {
1610 infoPtr->flags = new_flags;
1611 *action |= SA_SSI_REPAINT_ARROWS;
1612 }
1613 }
1614
1615 done:
1616 /* Return current position */
1617
1618 return infoPtr->curVal;
1619 }
1620
1621
1622 /*************************************************************************
1623 * GetScrollInfo (USER32.@)
1624 *
1625 * GetScrollInfo can be used to retrieve the position, upper bound,
1626 * lower bound, and page size of a scrollbar control.
1627 *
1628 * RETURNS STD
1629 */
1630 BOOL WINAPI GetScrollInfo(
1631 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1632 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1633 LPSCROLLINFO info /* [in/out] (fMask specifies which values to retrieve) */)
1634 {
1635 TRACE("hwnd=%p nBar=%d info=%p\n", hwnd, nBar, info);
1636
1637 /* Refer SB_CTL requests to the window */
1638 if (nBar == SB_CTL)
1639 return SendMessageA(hwnd, SBM_GETSCROLLINFO, (WPARAM)0, (LPARAM)info);
1640 else
1641 return SCROLL_GetScrollInfo(hwnd, nBar, info);
1642 }
1643
1644
1645 /*************************************************************************
1646 * SetScrollPos (USER32.@)
1647 *
1648 * RETURNS
1649 * Success: Scrollbar position
1650 * Failure: 0
1651 *
1652 * REMARKS
1653 * Note the ambiguity when 0 is returned. Use GetLastError
1654 * to make sure there was an error (and to know which one).
1655 */
1656 INT WINAPI SetScrollPos(
1657 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1658 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1659 INT nPos /* [in] New value */,
1660 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */ )
1661 {
1662 SCROLLINFO info;
1663 SCROLLBAR_INFO *infoPtr;
1664 INT oldPos;
1665
1666 if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar ))) return 0;
1667 oldPos = infoPtr->curVal;
1668 info.cbSize = sizeof(info);
1669 info.nPos = nPos;
1670 info.fMask = SIF_POS;
1671 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1672 return oldPos;
1673 }
1674
1675
1676 /*************************************************************************
1677 * GetScrollPos (USER32.@)
1678 *
1679 * RETURNS
1680 * Success: Current position
1681 * Failure: 0
1682 *
1683 * REMARKS
1684 * There is ambiguity when 0 is returned. Use GetLastError
1685 * to make sure there was an error (and to know which one).
1686 */
1687 INT WINAPI GetScrollPos(
1688 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1689 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1690 {
1691 TRACE("hwnd=%p nBar=%d\n", hwnd, nBar);
1692
1693 /* Refer SB_CTL requests to the window */
1694 if (nBar == SB_CTL)
1695 return SendMessageA(hwnd, SBM_GETPOS, (WPARAM)0, (LPARAM)0);
1696 else
1697 return SCROLL_GetScrollPos(hwnd, nBar);
1698 }
1699
1700
1701 /*************************************************************************
1702 * SetScrollRange (USER32.@)
1703 *
1704 * RETURNS STD
1705 */
1706 BOOL WINAPI SetScrollRange(
1707 HWND hwnd, /* [in] Handle of window whose scrollbar will be affected */
1708 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1709 INT minVal, /* [in] New minimum value */
1710 INT maxVal, /* [in] New maximum value */
1711 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1712 {
1713 SCROLLINFO info;
1714
1715 info.cbSize = sizeof(info);
1716 info.nMin = minVal;
1717 info.nMax = maxVal;
1718 info.fMask = SIF_RANGE;
1719 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1720 return TRUE;
1721 }
1722
1723
1724 /*************************************************************************
1725 * SCROLL_SetNCSbState
1726 *
1727 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1728 */
1729 INT SCROLL_SetNCSbState(HWND hwnd, int vMin, int vMax, int vPos,
1730 int hMin, int hMax, int hPos)
1731 {
1732 INT vA, hA;
1733 SCROLLINFO vInfo, hInfo;
1734
1735 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1736 vInfo.nMin = vMin;
1737 vInfo.nMax = vMax;
1738 vInfo.nPos = vPos;
1739 hInfo.nMin = hMin;
1740 hInfo.nMax = hMax;
1741 hInfo.nPos = hPos;
1742 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1743
1744 SCROLL_SetScrollInfo( hwnd, SB_VERT, &vInfo, &vA );
1745 SCROLL_SetScrollInfo( hwnd, SB_HORZ, &hInfo, &hA );
1746
1747 if( !SCROLL_ShowScrollBar( hwnd, SB_BOTH,
1748 (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1749 {
1750 /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1751 if( vA & SA_SSI_REFRESH )
1752 SCROLL_RefreshScrollBar( hwnd, SB_VERT, FALSE, TRUE );
1753
1754 if( hA & SA_SSI_REFRESH )
1755 SCROLL_RefreshScrollBar( hwnd, SB_HORZ, FALSE, TRUE );
1756 }
1757 return 0;
1758 }
1759
1760
1761 /*************************************************************************
1762 * GetScrollRange (USER32.@)
1763 *
1764 * RETURNS STD
1765 */
1766 BOOL WINAPI GetScrollRange(
1767 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1768 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1769 LPINT lpMin /* [out] Where to store minimum value */,
1770 LPINT lpMax /* [out] Where to store maximum value */)
1771 {
1772 TRACE("hwnd=%p nBar=%d lpMin=%p lpMax=%p\n", hwnd, nBar, lpMin, lpMax);
1773
1774 /* Refer SB_CTL requests to the window */
1775 if (nBar == SB_CTL)
1776 return SendMessageA(hwnd, SBM_GETRANGE, (WPARAM)lpMin, (LPARAM)lpMax);
1777 else
1778 return SCROLL_GetScrollRange(hwnd, nBar, lpMin, lpMax);
1779 }
1780
1781
1782 /*************************************************************************
1783 * SCROLL_ShowScrollBar()
1784 *
1785 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1786 */
1787 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1788 BOOL fShowH, BOOL fShowV )
1789 {
1790 LONG style = GetWindowLongW( hwnd, GWL_STYLE );
1791
1792 TRACE("hwnd=%p bar=%d horz=%d, vert=%d\n", hwnd, nBar, fShowH, fShowV );
1793
1794 switch(nBar)
1795 {
1796 case SB_CTL:
1797 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1798 return TRUE;
1799
1800 case SB_BOTH:
1801 case SB_HORZ:
1802 if (fShowH)
1803 {
1804 fShowH = !(style & WS_HSCROLL);
1805 style |= WS_HSCROLL;
1806 }
1807 else /* hide it */
1808 {
1809 fShowH = (style & WS_HSCROLL);
1810 style &= ~WS_HSCROLL;
1811 }
1812 if( nBar == SB_HORZ ) {
1813 fShowV = FALSE;
1814 break;
1815 }
1816 /* fall through */
1817
1818 case SB_VERT:
1819 if (fShowV)
1820 {
1821 fShowV = !(style & WS_VSCROLL);
1822 style |= WS_VSCROLL;
1823 }
1824 else /* hide it */
1825 {
1826 fShowV = (style & WS_VSCROLL);
1827 style &= ~WS_VSCROLL;
1828 }
1829 if ( nBar == SB_VERT )
1830 fShowH = FALSE;
1831 break;
1832
1833 default:
1834 return FALSE; /* Nothing to do! */
1835 }
1836
1837 if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1838 {
1839 WIN_SetStyle( hwnd, style );
1840 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1841 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1842 return TRUE;
1843 }
1844 return FALSE; /* no frame changes */
1845 }
1846
1847
1848 /*************************************************************************
1849 * ShowScrollBar (USER32.@)
1850 *
1851 * RETURNS STD
1852 */
1853 BOOL WINAPI ShowScrollBar(
1854 HWND hwnd, /* [in] Handle of window whose scrollbar(s) will be affected */
1855 INT nBar, /* [in] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1856 BOOL fShow /* [in] TRUE = show, FALSE = hide */)
1857 {
1858 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1859 (nBar == SB_HORZ) ? 0 : fShow );
1860 return TRUE;
1861 }
1862
1863
1864 /*************************************************************************
1865 * EnableScrollBar (USER32.@)
1866 */
1867 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1868 {
1869 BOOL bFineWithMe;
1870 SCROLLBAR_INFO *infoPtr;
1871
1872 TRACE("%p %d %d\n", hwnd, nBar, flags );
1873
1874 flags &= ESB_DISABLE_BOTH;
1875
1876 if (nBar == SB_BOTH)
1877 {
1878 if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, SB_VERT ))) return FALSE;
1879 if (!(bFineWithMe = (infoPtr->flags == flags)) )
1880 {
1881 infoPtr->flags = flags;
1882 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1883 }
1884 nBar = SB_HORZ;
1885 }
1886 else
1887 bFineWithMe = TRUE;
1888
1889 if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar ))) return FALSE;
1890 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1891 infoPtr->flags = flags;
1892
1893 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1894 return TRUE;
1895 }
Windows API implementation