?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Prevent listview from crashing when a null sort function is passed to
[wine.git] / controls / scroll.c
blobaf0b098433ff0a6a5f8fcdd5426dc09d4b74416d
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 /* Minimum size of the rectangle between the arrows */
47 #define SCROLL_MIN_RECT 4
48
49 /* Minimum size of the thumb in pixels */
50 #define SCROLL_MIN_THUMB 6
51
52 /* Overlap between arrows and thumb */
53 #define SCROLL_ARROW_THUMB_OVERLAP 0
54
55 /* Delay (in ms) before first repetition when holding the button down */
56 #define SCROLL_FIRST_DELAY 200
57
58 /* Delay (in ms) between scroll repetitions */
59 #define SCROLL_REPEAT_DELAY 50
60
61 /* Scroll timer id */
62 #define SCROLL_TIMER 0
63
64 /* Scroll-bar hit testing */
65 enum SCROLL_HITTEST
66 {
67 SCROLL_NOWHERE, /* Outside the scroll bar */
68 SCROLL_TOP_ARROW, /* Top or left arrow */
69 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
70 SCROLL_THUMB, /* Thumb rectangle */
71 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
72 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
73 };
74
75 /* What to do after SCROLL_SetScrollInfo() */
76 #define SA_SSI_HIDE 0x0001
77 #define SA_SSI_SHOW 0x0002
78 #define SA_SSI_REFRESH 0x0004
79 #define SA_SSI_REPAINT_ARROWS 0x0008
80
81 /* Thumb-tracking info */
82 static HWND SCROLL_TrackingWin = 0;
83 static INT SCROLL_TrackingBar = 0;
84 static INT SCROLL_TrackingPos = 0;
85 static INT SCROLL_TrackingVal = 0;
86 /* Hit test code of the last button-down event */
87 static enum SCROLL_HITTEST SCROLL_trackHitTest;
88 static BOOL SCROLL_trackVertical;
89
90 /* Is the moving thumb being displayed? */
91 static BOOL SCROLL_MovingThumb = FALSE;
92
93 /* Local functions */
94 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
95 BOOL fShowH, BOOL fShowV );
96 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
97 const SCROLLINFO *info, BOOL bRedraw );
98 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
99 RECT *rect, INT arrowSize,
100 INT thumbSize, INT thumbPos,
101 UINT flags, BOOL vertical,
102 BOOL top_selected, BOOL bottom_selected );
103 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
104
105
106 /*********************************************************************
107 * scrollbar class descriptor
108 */
109 const struct builtin_class_descr SCROLL_builtin_class =
110 {
111 "ScrollBar", /* name */
112 CS_DBLCLKS | CS_VREDRAW | CS_HREDRAW | CS_PARENTDC, /* style */
113 NULL, /* procA (winproc is Unicode only) */
114 ScrollBarWndProc, /* procW */
115 sizeof(SCROLLBAR_INFO), /* extra */
116 IDC_ARROW, /* cursor */
117 0 /* brush */
118 };
119
120 /***********************************************************************
121 * SCROLL_ScrollInfoValid
122 *
123 * Determine if the supplied SCROLLINFO struct is valid.
124 */
125 inline static BOOL SCROLL_ScrollInfoValid(
126 LPSCROLLINFO info /* [in] The SCROLLINFO struct to be tested */)
127 {
128 return !(info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)
129 || (info->cbSize != sizeof(*info)
130 && info->cbSize != sizeof(*info) - sizeof(info->nTrackPos)));
131 }
132
133
134 /***********************************************************************
135 * SCROLL_GetScrollBarInfo
136 */
137 static SCROLLBAR_INFO *SCROLL_GetScrollBarInfo( HWND hwnd, INT nBar )
138 {
139 SCROLLBAR_INFO *infoPtr;
140 WND *wndPtr = WIN_FindWndPtr( hwnd );
141
142 if (!wndPtr) return NULL;
143 switch(nBar)
144 {
145 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
146 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
147 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
148 default:
149 WIN_ReleaseWndPtr( wndPtr );
150 return NULL;
151 }
152
153 if (!infoPtr) /* Create the info structure if needed */
154 {
155 if ((infoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(SCROLLBAR_INFO) )))
156 {
157 infoPtr->minVal = infoPtr->curVal = infoPtr->page = 0;
158 infoPtr->maxVal = 100;
159 infoPtr->flags = ESB_ENABLE_BOTH;
160 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
161 else wndPtr->pVScroll = infoPtr;
162 }
163 }
164 WIN_ReleaseWndPtr( wndPtr );
165 return infoPtr;
166 }
167
168
169 /***********************************************************************
170 * SCROLL_GetScrollBarRect
171 *
172 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
173 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
174 * 'arrowSize' returns the width or height of an arrow (depending on
175 * the orientation of the scrollbar), 'thumbSize' returns the size of
176 * the thumb, and 'thumbPos' returns the position of the thumb
177 * relative to the left or to the top.
178 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
179 */
180 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
181 INT *arrowSize, INT *thumbSize,
182 INT *thumbPos )
183 {
184 INT pixels;
185 BOOL vertical;
186 WND *wndPtr = WIN_FindWndPtr( hwnd );
187
188 switch(nBar)
189 {
190 case SB_HORZ:
191 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
192 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
193 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
194 lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
195 if(wndPtr->dwStyle & WS_BORDER) {
196 lprect->left--;
197 lprect->right++;
198 } else if(wndPtr->dwStyle & WS_VSCROLL)
199 lprect->right++;
200 vertical = FALSE;
201 break;
202
203 case SB_VERT:
204 if((wndPtr->dwExStyle & WS_EX_LEFTSCROLLBAR) != 0)
205 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left - GetSystemMetrics(SM_CXVSCROLL);
206 else
207 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
208 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
209 lprect->right = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
210 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
211 if(wndPtr->dwStyle & WS_BORDER) {
212 lprect->top--;
213 lprect->bottom++;
214 } else if(wndPtr->dwStyle & WS_HSCROLL)
215 lprect->bottom++;
216 vertical = TRUE;
217 break;
218
219 case SB_CTL:
220 GetClientRect( hwnd, lprect );
221 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
222 break;
223
224 default:
225 WIN_ReleaseWndPtr(wndPtr);
226 return FALSE;
227 }
228
229 if (vertical) pixels = lprect->bottom - lprect->top;
230 else pixels = lprect->right - lprect->left;
231
232 if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
233 {
234 if (pixels > SCROLL_MIN_RECT)
235 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
236 else
237 *arrowSize = 0;
238 *thumbPos = *thumbSize = 0;
239 }
240 else
241 {
242 SCROLLBAR_INFO *info = SCROLL_GetScrollBarInfo( hwnd, nBar );
243
244 *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
245 pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
246
247 if (info->page)
248 {
249 *thumbSize = MulDiv(pixels,info->page,(info->maxVal-info->minVal+1));
250 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
251 }
252 else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
253
254 if (((pixels -= *thumbSize ) < 0) ||
255 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
256 {
257 /* Rectangle too small or scrollbar disabled -> no thumb */
258 *thumbPos = *thumbSize = 0;
259 }
260 else
261 {
262 INT max = info->maxVal - max( info->page-1, 0 );
263 if (info->minVal >= max)
264 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
265 else
266 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
267 + MulDiv(pixels, (info->curVal-info->minVal),(max - info->minVal));
268 }
269 }
270 WIN_ReleaseWndPtr(wndPtr);
271 return vertical;
272 }
273
274
275 /***********************************************************************
276 * SCROLL_GetThumbVal
277 *
278 * Compute the current scroll position based on the thumb position in pixels
279 * from the top of the scroll-bar.
280 */
281 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
282 BOOL vertical, INT pos )
283 {
284 INT thumbSize;
285 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
286
287 if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
288 return infoPtr->minVal;
289
290 if (infoPtr->page)
291 {
292 thumbSize = MulDiv(pixels,infoPtr->page,(infoPtr->maxVal-infoPtr->minVal+1));
293 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
294 }
295 else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
296
297 if ((pixels -= thumbSize) <= 0) return infoPtr->minVal;
298
299 pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
300 if (pos > pixels) pos = pixels;
301
302 if (!infoPtr->page) pos *= infoPtr->maxVal - infoPtr->minVal;
303 else pos *= infoPtr->maxVal - infoPtr->minVal - infoPtr->page + 1;
304 return infoPtr->minVal + ((pos + pixels / 2) / pixels);
305 }
306
307 /***********************************************************************
308 * SCROLL_PtInRectEx
309 */
310 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
311 {
312 RECT rect = *lpRect;
313
314 if (vertical)
315 {
316 rect.left -= lpRect->right - lpRect->left;
317 rect.right += lpRect->right - lpRect->left;
318 }
319 else
320 {
321 rect.top -= lpRect->bottom - lpRect->top;
322 rect.bottom += lpRect->bottom - lpRect->top;
323 }
324 return PtInRect( &rect, pt );
325 }
326
327 /***********************************************************************
328 * SCROLL_ClipPos
329 */
330 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
331 {
332 if( pt.x < lpRect->left )
333 pt.x = lpRect->left;
334 else
335 if( pt.x > lpRect->right )
336 pt.x = lpRect->right;
337
338 if( pt.y < lpRect->top )
339 pt.y = lpRect->top;
340 else
341 if( pt.y > lpRect->bottom )
342 pt.y = lpRect->bottom;
343
344 return pt;
345 }
346
347
348 /***********************************************************************
349 * SCROLL_HitTest
350 *
351 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
352 */
353 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
354 POINT pt, BOOL bDragging )
355 {
356 INT arrowSize, thumbSize, thumbPos;
357 RECT rect;
358
359 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
360 &arrowSize, &thumbSize, &thumbPos );
361
362 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
363 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
364
365 if (vertical)
366 {
367 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
368 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
369 if (!thumbPos) return SCROLL_TOP_RECT;
370 pt.y -= rect.top;
371 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
372 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
373 }
374 else /* horizontal */
375 {
376 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
377 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
378 if (!thumbPos) return SCROLL_TOP_RECT;
379 pt.x -= rect.left;
380 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
381 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
382 }
383 return SCROLL_THUMB;
384 }
385
386
387 /***********************************************************************
388 * SCROLL_DrawArrows
389 *
390 * Draw the scroll bar arrows.
391 */
392 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
393 RECT *rect, INT arrowSize, BOOL vertical,
394 BOOL top_pressed, BOOL bottom_pressed )
395 {
396 RECT r;
397
398 r = *rect;
399 if( vertical )
400 r.bottom = r.top + arrowSize;
401 else
402 r.right = r.left + arrowSize;
403
404 DrawFrameControl( hdc, &r, DFC_SCROLL,
405 (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
406 | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
407 | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
408
409 r = *rect;
410 if( vertical )
411 r.top = r.bottom-arrowSize;
412 else
413 r.left = r.right-arrowSize;
414
415 DrawFrameControl( hdc, &r, DFC_SCROLL,
416 (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
417 | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
418 | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
419 }
420
421 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
422 INT arrowSize, INT thumbSize )
423 {
424 INT pos = SCROLL_TrackingPos;
425 INT max_size;
426
427 if( vertical )
428 max_size = rect->bottom - rect->top;
429 else
430 max_size = rect->right - rect->left;
431
432 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
433
434 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
435 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
436 else if( pos > max_size )
437 pos = max_size;
438
439 SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
440 rect, arrowSize, thumbSize, pos,
441 0, vertical, FALSE, FALSE );
442
443 SCROLL_MovingThumb = !SCROLL_MovingThumb;
444 }
445
446 /***********************************************************************
447 * SCROLL_DrawInterior
448 *
449 * Draw the scroll bar interior (everything except the arrows).
450 */
451 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
452 RECT *rect, INT arrowSize,
453 INT thumbSize, INT thumbPos,
454 UINT flags, BOOL vertical,
455 BOOL top_selected, BOOL bottom_selected )
456 {
457 RECT r;
458 HPEN hSavePen;
459 HBRUSH hSaveBrush,hBrush;
460
461 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
462 * The window-owned scrollbars need to call DEFWND_ControlColor
463 * to correctly setup default scrollbar colors
464 */
465 if (nBar == SB_CTL)
466 {
467 hBrush = (HBRUSH)SendMessageW( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
468 (WPARAM)hdc,(LPARAM)hwnd);
469 }
470 else
471 {
472 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
473 }
474
475 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
476 hSaveBrush = SelectObject( hdc, hBrush );
477
478 /* Calculate the scroll rectangle */
479 r = *rect;
480 if (vertical)
481 {
482 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
483 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
484 }
485 else
486 {
487 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
488 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
489 }
490
491 /* Draw the scroll rectangles and thumb */
492 if (!thumbPos) /* No thumb to draw */
493 {
494 PatBlt( hdc, r.left, r.top,
495 r.right - r.left, r.bottom - r.top,
496 PATCOPY );
497
498 /* cleanup and return */
499 SelectObject( hdc, hSavePen );
500 SelectObject( hdc, hSaveBrush );
501 return;
502 }
503
504 if (vertical)
505 {
506 PatBlt( hdc, r.left, r.top,
507 r.right - r.left,
508 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
509 top_selected ? 0x0f0000 : PATCOPY );
510 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
511 PatBlt( hdc, r.left, r.top + thumbSize,
512 r.right - r.left,
513 r.bottom - r.top - thumbSize,
514 bottom_selected ? 0x0f0000 : PATCOPY );
515 r.bottom = r.top + thumbSize;
516 }
517 else /* horizontal */
518 {
519 PatBlt( hdc, r.left, r.top,
520 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
521 r.bottom - r.top,
522 top_selected ? 0x0f0000 : PATCOPY );
523 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
524 PatBlt( hdc, r.left + thumbSize, r.top,
525 r.right - r.left - thumbSize,
526 r.bottom - r.top,
527 bottom_selected ? 0x0f0000 : PATCOPY );
528 r.right = r.left + thumbSize;
529 }
530
531 /* Draw the thumb */
532 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
533
534 /* cleanup */
535 SelectObject( hdc, hSavePen );
536 SelectObject( hdc, hSaveBrush );
537 }
538
539
540 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
541 RECT *rect, INT arrowSize,
542 INT thumbSize, INT thumbPos,
543 UINT flags, BOOL vertical,
544 BOOL top_selected, BOOL bottom_selected )
545 {
546 RECT r;
547 HPEN hSavePen;
548 HBRUSH hSaveBrush,hBrush;
549 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
550
551 if (Save_SCROLL_MovingThumb &&
552 (SCROLL_TrackingWin == hwnd) &&
553 (SCROLL_TrackingBar == nBar))
554 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
555
556 /* Select the correct brush and pen */
557
558 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
559 * The window-owned scrollbars need to call DEFWND_ControlColor
560 * to correctly setup default scrollbar colors
561 */
562 if (nBar == SB_CTL) {
563 hBrush = (HBRUSH)SendMessageW( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
564 (WPARAM)hdc,(LPARAM)hwnd);
565 } else {
566 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
567 }
568 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
569 hSaveBrush = SelectObject( hdc, hBrush );
570
571 /* Calculate the scroll rectangle */
572
573 r = *rect;
574 if (vertical)
575 {
576 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
577 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
578 }
579 else
580 {
581 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
582 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
583 }
584
585 /* Draw the scroll bar frame */
586
587 /* Draw the scroll rectangles and thumb */
588
589 if (!thumbPos) /* No thumb to draw */
590 {
591 PatBlt( hdc, r.left, r.top, r.right - r.left, r.bottom - r.top, PATCOPY );
592
593 /* cleanup and return */
594 SelectObject( hdc, hSavePen );
595 SelectObject( hdc, hSaveBrush );
596 return;
597 }
598
599 if (vertical)
600 {
601 PatBlt( hdc, r.left, r.top, r.right - r.left,
602 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
603 top_selected ? 0x0f0000 : PATCOPY );
604 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
605 PatBlt( hdc, r.left, r.top + thumbSize, r.right - r.left,
606 r.bottom - r.top - thumbSize,
607 bottom_selected ? 0x0f0000 : PATCOPY );
608 r.bottom = r.top + thumbSize;
609 }
610 else /* horizontal */
611 {
612 PatBlt( hdc, r.left, r.top,
613 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
614 r.bottom - r.top, top_selected ? 0x0f0000 : PATCOPY );
615 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
616 PatBlt( hdc, r.left + thumbSize, r.top, r.right - r.left - thumbSize,
617 r.bottom - r.top, bottom_selected ? 0x0f0000 : PATCOPY );
618 r.right = r.left + thumbSize;
619 }
620
621 /* Draw the thumb */
622
623 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
624 Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
625 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
626
627 if (Save_SCROLL_MovingThumb &&
628 (SCROLL_TrackingWin == hwnd) &&
629 (SCROLL_TrackingBar == nBar))
630 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
631
632 /* cleanup */
633 SelectObject( hdc, hSavePen );
634 SelectObject( hdc, hSaveBrush );
635 }
636
637
638 /***********************************************************************
639 * SCROLL_DrawScrollBar
640 *
641 * Redraw the whole scrollbar.
642 */
643 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
644 BOOL arrows, BOOL interior )
645 {
646 INT arrowSize, thumbSize, thumbPos;
647 RECT rect;
648 BOOL vertical;
649 WND *wndPtr = WIN_FindWndPtr( hwnd );
650 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar );
651 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
652
653 if (!wndPtr || !infoPtr ||
654 ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
655 ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
656 if (!WIN_IsWindowDrawable( hwnd, FALSE )) goto END;
657 hwnd = wndPtr->hwndSelf; /* make it a full handle */
658
659 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
660 &arrowSize, &thumbSize, &thumbPos );
661
662 /* do not draw if the scrollbar rectangle is empty */
663 if(IsRectEmpty(&rect))
664 goto END;
665
666 if (Save_SCROLL_MovingThumb &&
667 (SCROLL_TrackingWin == hwnd) &&
668 (SCROLL_TrackingBar == nBar))
669 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
670
671 /* Draw the arrows */
672
673 if (arrows && arrowSize)
674 {
675 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
676 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
677 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
678 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
679 else
680 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
681 FALSE, FALSE );
682 }
683 if( interior )
684 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
685 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
686
687 if (Save_SCROLL_MovingThumb &&
688 (SCROLL_TrackingWin == hwnd) &&
689 (SCROLL_TrackingBar == nBar))
690 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
691
692 /* if scroll bar has focus, reposition the caret */
693 if(hwnd==GetFocus() && (nBar==SB_CTL))
694 {
695 if (!vertical)
696 {
697 SetCaretPos(thumbPos+1, rect.top+1);
698 }
699 else
700 {
701 SetCaretPos(rect.top+1, thumbPos+1);
702 }
703 }
704
705 END:
706 WIN_ReleaseWndPtr(wndPtr);
707 }
708
709 /***********************************************************************
710 * SCROLL_DrawSizeGrip
711 *
712 * Draw the size grip.
713 */
714 static void SCROLL_DrawSizeGrip( HWND hwnd, HDC hdc)
715 {
716 RECT rc;
717
718 GetClientRect( hwnd, &rc );
719 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
720 rc.left = max( rc.left, rc.right - GetSystemMetrics(SM_CXVSCROLL) - 1 );
721 rc.top = max( rc.top, rc.bottom - GetSystemMetrics(SM_CYHSCROLL) - 1 );
722 DrawFrameControl( hdc, &rc, DFC_SCROLL, DFCS_SCROLLSIZEGRIP );
723 }
724
725
726 /***********************************************************************
727 * SCROLL_RefreshScrollBar
728 *
729 * Repaint the scroll bar interior after a SetScrollRange() or
730 * SetScrollPos() call.
731 */
732 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
733 BOOL arrows, BOOL interior )
734 {
735 HDC hdc = GetDCEx( hwnd, 0,
736 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
737 if (!hdc) return;
738
739 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
740 ReleaseDC( hwnd, hdc );
741 }
742
743
744 /***********************************************************************
745 * SCROLL_HandleKbdEvent
746 *
747 * Handle a keyboard event (only for SB_CTL scrollbars with focus).
748 */
749 static void SCROLL_HandleKbdEvent(
750 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
751 WPARAM wParam /* [in] Variable input including enable state */,
752 LPARAM lParam /* [in] Variable input including input point */)
753 {
754 TRACE("hwnd=%p wParam=%d lParam=%ld\n", hwnd, wParam, lParam);
755
756 /* hide caret on first KEYDOWN to prevent flicker */
757 if ((lParam & PFD_DOUBLEBUFFER_DONTCARE) == 0)
758 HideCaret(hwnd);
759
760 switch(wParam)
761 {
762 case VK_PRIOR: wParam = SB_PAGEUP; break;
763 case VK_NEXT: wParam = SB_PAGEDOWN; break;
764 case VK_HOME: wParam = SB_TOP; break;
765 case VK_END: wParam = SB_BOTTOM; break;
766 case VK_UP: wParam = SB_LINEUP; break;
767 case VK_DOWN: wParam = SB_LINEDOWN; break;
768 default: return;
769 }
770 SendMessageW(GetParent(hwnd),
771 ((GetWindowLongW( hwnd, GWL_STYLE ) & SBS_VERT) ?
772 WM_VSCROLL : WM_HSCROLL), wParam, (LPARAM)hwnd);
773 }
774
775
776 /***********************************************************************
777 * SCROLL_HandleScrollEvent
778 *
779 * Handle a mouse or timer event for the scrollbar.
780 * 'pt' is the location of the mouse event in client (for SB_CTL) or
781 * windows coordinates.
782 */
783 static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
784 {
785 /* Previous mouse position for timer events */
786 static POINT prevPt;
787 /* Thumb position when tracking started. */
788 static UINT trackThumbPos;
789 /* Position in the scroll-bar of the last button-down event. */
790 static INT lastClickPos;
791 /* Position in the scroll-bar of the last mouse event. */
792 static INT lastMousePos;
793
794 enum SCROLL_HITTEST hittest;
795 HWND hwndOwner, hwndCtl;
796 BOOL vertical;
797 INT arrowSize, thumbSize, thumbPos;
798 RECT rect;
799 HDC hdc;
800
801 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar );
802 if (!infoPtr) return;
803 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
804 return;
805
806 if (nBar == SB_CTL && (GetWindowLongW( hwnd, GWL_STYLE ) & (SBS_SIZEGRIP | SBS_SIZEBOX)))
807 {
808 switch(msg)
809 {
810 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
811 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
812 SetCapture( hwnd );
813 prevPt = pt;
814 SCROLL_trackHitTest = hittest = SCROLL_THUMB;
815 break;
816 case WM_MOUSEMOVE:
817 GetClientRect(GetParent(GetParent(hwnd)),&rect);
818 prevPt = pt;
819 break;
820 case WM_LBUTTONUP:
821 ReleaseCapture();
822 SCROLL_trackHitTest = hittest = SCROLL_NOWHERE;
823 if (hwnd==GetFocus()) ShowCaret(hwnd);
824 break;
825 case WM_SYSTIMER:
826 pt = prevPt;
827 break;
828 }
829 return;
830 }
831
832 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
833 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
834 &arrowSize, &thumbSize, &thumbPos );
835 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
836 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
837
838 switch(msg)
839 {
840 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
841 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
842 SCROLL_trackVertical = vertical;
843 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
844 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
845 lastMousePos = lastClickPos;
846 trackThumbPos = thumbPos;
847 prevPt = pt;
848 if (nBar == SB_CTL && (GetWindowLongW(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
849 SetCapture( hwnd );
850 break;
851
852 case WM_MOUSEMOVE:
853 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
854 prevPt = pt;
855 break;
856
857 case WM_LBUTTONUP:
858 hittest = SCROLL_NOWHERE;
859 ReleaseCapture();
860 /* if scrollbar has focus, show back caret */
861 if (hwnd==GetFocus()) ShowCaret(hwnd);
862 break;
863
864 case WM_SYSTIMER:
865 pt = prevPt;
866 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
867 break;
868
869 default:
870 return; /* Should never happen */
871 }
872
873 TRACE("Event: hwnd=%p bar=%d msg=%s pt=%ld,%ld hit=%d\n",
874 hwnd, nBar, SPY_GetMsgName(msg,hwnd), pt.x, pt.y, hittest );
875
876 switch(SCROLL_trackHitTest)
877 {
878 case SCROLL_NOWHERE: /* No tracking in progress */
879 break;
880
881 case SCROLL_TOP_ARROW:
882 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
883 (hittest == SCROLL_trackHitTest), FALSE );
884 if (hittest == SCROLL_trackHitTest)
885 {
886 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
887 {
888 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
889 SB_LINEUP, (LPARAM)hwndCtl );
890 }
891
892 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
893 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
894 (TIMERPROC)0 );
895 }
896 else KillSystemTimer( hwnd, SCROLL_TIMER );
897 break;
898
899 case SCROLL_TOP_RECT:
900 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
901 thumbPos, infoPtr->flags, vertical,
902 (hittest == SCROLL_trackHitTest), FALSE );
903 if (hittest == SCROLL_trackHitTest)
904 {
905 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
906 {
907 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
908 SB_PAGEUP, (LPARAM)hwndCtl );
909 }
910 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
911 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
912 (TIMERPROC)0 );
913 }
914 else KillSystemTimer( hwnd, SCROLL_TIMER );
915 break;
916
917 case SCROLL_THUMB:
918 if (msg == WM_LBUTTONDOWN)
919 {
920 SCROLL_TrackingWin = hwnd;
921 SCROLL_TrackingBar = nBar;
922 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
923 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
924 vertical,
925 SCROLL_TrackingPos );
926 if (!SCROLL_MovingThumb)
927 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
928 }
929 else if (msg == WM_LBUTTONUP)
930 {
931 if (SCROLL_MovingThumb)
932 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
933 SCROLL_TrackingWin = 0;
934 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
935 thumbPos, infoPtr->flags, vertical,
936 FALSE, FALSE );
937 }
938 else /* WM_MOUSEMOVE */
939 {
940 UINT pos;
941
942 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
943 else
944 {
945 pt = SCROLL_ClipPos( &rect, pt );
946 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
947 }
948 if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
949 {
950 if (SCROLL_MovingThumb)
951 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
952 arrowSize, thumbSize );
953 lastMousePos = pos;
954 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
955 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
956 vertical,
957 SCROLL_TrackingPos );
958 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
959 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
960 (LPARAM)hwndCtl );
961 if (!SCROLL_MovingThumb)
962 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
963 arrowSize, thumbSize );
964 }
965 }
966 break;
967
968 case SCROLL_BOTTOM_RECT:
969 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
970 thumbPos, infoPtr->flags, vertical,
971 FALSE, (hittest == SCROLL_trackHitTest) );
972 if (hittest == SCROLL_trackHitTest)
973 {
974 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
975 {
976 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
977 SB_PAGEDOWN, (LPARAM)hwndCtl );
978 }
979 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
980 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
981 (TIMERPROC)0 );
982 }
983 else KillSystemTimer( hwnd, SCROLL_TIMER );
984 break;
985
986 case SCROLL_BOTTOM_ARROW:
987 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
988 FALSE, (hittest == SCROLL_trackHitTest) );
989 if (hittest == SCROLL_trackHitTest)
990 {
991 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
992 {
993 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
994 SB_LINEDOWN, (LPARAM)hwndCtl );
995 }
996
997 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
998 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
999 (TIMERPROC)0 );
1000 }
1001 else KillSystemTimer( hwnd, SCROLL_TIMER );
1002 break;
1003 }
1004
1005 if (msg == WM_LBUTTONDOWN)
1006 {
1007
1008 if (hittest == SCROLL_THUMB)
1009 {
1010 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1011 trackThumbPos + lastMousePos - lastClickPos );
1012 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1013 MAKEWPARAM( SB_THUMBTRACK, val ), (LPARAM)hwndCtl );
1014 }
1015 }
1016
1017 if (msg == WM_LBUTTONUP)
1018 {
1019 hittest = SCROLL_trackHitTest;
1020 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1021
1022 if (hittest == SCROLL_THUMB)
1023 {
1024 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1025 trackThumbPos + lastMousePos - lastClickPos );
1026 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1027 MAKEWPARAM( SB_THUMBPOSITION, val ), (LPARAM)hwndCtl );
1028 }
1029 SendMessageW( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1030 SB_ENDSCROLL, (LPARAM)hwndCtl );
1031 }
1032
1033 ReleaseDC( hwnd, hdc );
1034 }
1035
1036
1037 /***********************************************************************
1038 * SCROLL_TrackScrollBar
1039 *
1040 * Track a mouse button press on a scroll-bar.
1041 * pt is in screen-coordinates for non-client scroll bars.
1042 */
1043 void SCROLL_TrackScrollBar( HWND hwnd, INT scrollbar, POINT pt )
1044 {
1045 MSG msg;
1046 INT xoffset = 0, yoffset = 0;
1047
1048 if (scrollbar != SB_CTL)
1049 {
1050 WND *wndPtr = WIN_GetPtr( hwnd );
1051 if (!wndPtr || wndPtr == WND_OTHER_PROCESS) return;
1052 xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
1053 yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
1054 WIN_ReleasePtr( wndPtr );
1055 ScreenToClient( hwnd, &pt );
1056 pt.x += xoffset;
1057 pt.y += yoffset;
1058 }
1059
1060 SCROLL_HandleScrollEvent( hwnd, scrollbar, WM_LBUTTONDOWN, pt );
1061
1062 do
1063 {
1064 if (!GetMessageW( &msg, 0, 0, 0 )) break;
1065 if (CallMsgFilterW( &msg, MSGF_SCROLLBAR )) continue;
1066 switch(msg.message)
1067 {
1068 case WM_LBUTTONUP:
1069 case WM_MOUSEMOVE:
1070 case WM_SYSTIMER:
1071 pt.x = (short)LOWORD(msg.lParam) + xoffset;
1072 pt.y = (short)HIWORD(msg.lParam) + yoffset;
1073 SCROLL_HandleScrollEvent( hwnd, scrollbar, msg.message, pt );
1074 break;
1075 default:
1076 TranslateMessage( &msg );
1077 DispatchMessageW( &msg );
1078 break;
1079 }
1080 if (!IsWindow( hwnd ))
1081 {
1082 ReleaseCapture();
1083 break;
1084 }
1085 } while (msg.message != WM_LBUTTONUP);
1086 }
1087
1088
1089 /***********************************************************************
1090 * SCROLL_CreateScrollBar
1091 *
1092 * Create a scroll bar
1093 */
1094 static void SCROLL_CreateScrollBar(
1095 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1096 LPCREATESTRUCTW lpCreate /* [in] The style and place of the scroll bar */)
1097 {
1098 LPSCROLLBAR_INFO info = SCROLL_GetScrollBarInfo(hwnd, SB_CTL);
1099 if (!info) return;
1100
1101 TRACE("hwnd=%p lpCreate=%p\n", hwnd, lpCreate);
1102
1103 if (lpCreate->style & WS_DISABLED)
1104 {
1105 info->flags = ESB_DISABLE_BOTH;
1106 TRACE("Created WS_DISABLED scrollbar\n");
1107 }
1108
1109
1110 if (lpCreate->style & (SBS_SIZEGRIP | SBS_SIZEBOX))
1111 {
1112 if (lpCreate->style & SBS_SIZEBOXTOPLEFTALIGN)
1113 MoveWindow( hwnd, lpCreate->x, lpCreate->y, GetSystemMetrics(SM_CXVSCROLL)+1,
1114 GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1115 else if(lpCreate->style & SBS_SIZEBOXBOTTOMRIGHTALIGN)
1116 MoveWindow( hwnd, lpCreate->x+lpCreate->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1117 lpCreate->y+lpCreate->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1118 GetSystemMetrics(SM_CXVSCROLL)+1,
1119 GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1120 }
1121 else if (lpCreate->style & SBS_VERT)
1122 {
1123 if (lpCreate->style & SBS_LEFTALIGN)
1124 MoveWindow( hwnd, lpCreate->x, lpCreate->y,
1125 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreate->cy, FALSE );
1126 else if (lpCreate->style & SBS_RIGHTALIGN)
1127 MoveWindow( hwnd,
1128 lpCreate->x+lpCreate->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1129 lpCreate->y,
1130 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreate->cy, FALSE );
1131 }
1132 else /* SBS_HORZ */
1133 {
1134 if (lpCreate->style & SBS_TOPALIGN)
1135 MoveWindow( hwnd, lpCreate->x, lpCreate->y,
1136 lpCreate->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1137 else if (lpCreate->style & SBS_BOTTOMALIGN)
1138 MoveWindow( hwnd,
1139 lpCreate->x,
1140 lpCreate->y+lpCreate->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1141 lpCreate->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1142 }
1143 }
1144
1145
1146 /*************************************************************************
1147 * SCROLL_GetScrollInfo
1148 *
1149 * Internal helper for the API function
1150 */
1151 static BOOL SCROLL_GetScrollInfo(
1152 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1153 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1154 LPSCROLLINFO info /* [in/out] (fMask specifies which values to retrieve) */)
1155 {
1156 LPSCROLLBAR_INFO infoPtr;
1157
1158 /* handle invalid data structure */
1159 if (!SCROLL_ScrollInfoValid(info)
1160 || !(infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar)))
1161 return FALSE;
1162
1163 /* fill in the desired scroll info structure */
1164 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->page;
1165 if (info->fMask & SIF_POS) info->nPos = infoPtr->curVal;
1166 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1167 info->nTrackPos = (SCROLL_TrackingWin == WIN_GetFullHandle(hwnd)) ? SCROLL_TrackingVal : infoPtr->curVal;
1168 if (info->fMask & SIF_RANGE)
1169 {
1170 info->nMin = infoPtr->minVal;
1171 info->nMax = infoPtr->maxVal;
1172 }
1173
1174 return (info->fMask & SIF_ALL) != 0;
1175 }
1176
1177
1178 /*************************************************************************
1179 * SCROLL_GetScrollPos
1180 *
1181 * Internal helper for the API function
1182 */
1183 static INT SCROLL_GetScrollPos(
1184 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1185 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1186 {
1187 LPSCROLLBAR_INFO infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar);
1188 return infoPtr ? infoPtr->curVal: 0;
1189 }
1190
1191
1192 /*************************************************************************
1193 * SCROLL_GetScrollRange
1194 *
1195 * Internal helper for the API function
1196 *
1197 * RETURNS STD
1198 */
1199 static BOOL SCROLL_GetScrollRange(
1200 HWND hwnd, /* [in] Handle of window */
1201 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1202 LPINT lpMin, /* [out] Where to store minimum value */
1203 LPINT lpMax /* [out] Where to store maximum value */)
1204 {
1205 LPSCROLLBAR_INFO infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar);
1206
1207 if (lpMin) *lpMin = infoPtr ? infoPtr->minVal : 0;
1208 if (lpMax) *lpMax = infoPtr ? infoPtr->maxVal : 0;
1209
1210 return TRUE;
1211 }
1212
1213
1214 /*************************************************************************
1215 * SCROLL_SetScrollRange
1216 *
1217 */
1218 static BOOL SCROLL_SetScrollRange(
1219 HWND hwnd, /* [in] Handle of window */
1220 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1221 INT minVal, /* [out] minimum value */
1222 INT maxVal /* [out] maximum value */)
1223 {
1224 LPSCROLLBAR_INFO infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar);
1225
1226 TRACE("hwnd=%p nBar=%d min=%d max=%d\n", hwnd, nBar, minVal, maxVal);
1227
1228 if (infoPtr)
1229 {
1230 infoPtr->minVal = minVal;
1231 infoPtr->maxVal = maxVal;
1232 }
1233 return TRUE;
1234 }
1235
1236
1237 /***********************************************************************
1238 * ScrollBarWndProc
1239 */
1240 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1241 {
1242 if (!IsWindow( hwnd )) return 0;
1243
1244 switch(message)
1245 {
1246 case WM_CREATE:
1247 SCROLL_CreateScrollBar(hwnd, (LPCREATESTRUCTW)lParam);
1248 break;
1249
1250 case WM_ENABLE:
1251 {
1252 SCROLLBAR_INFO *infoPtr;
1253 if ((infoPtr = SCROLL_GetScrollBarInfo( hwnd, SB_CTL )))
1254 {
1255 infoPtr->flags = wParam ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH;
1256 SCROLL_RefreshScrollBar(hwnd, SB_CTL, TRUE, TRUE);
1257 }
1258 }
1259 return 0;
1260
1261 case WM_LBUTTONDBLCLK:
1262 case WM_LBUTTONDOWN:
1263 {
1264 POINT pt;
1265 pt.x = (short)LOWORD(lParam);
1266 pt.y = (short)HIWORD(lParam);
1267 SCROLL_TrackScrollBar( hwnd, SB_CTL, pt );
1268 }
1269 break;
1270 case WM_LBUTTONUP:
1271 case WM_MOUSEMOVE:
1272 case WM_SYSTIMER:
1273 {
1274 POINT pt;
1275 pt.x = (short)LOWORD(lParam);
1276 pt.y = (short)HIWORD(lParam);
1277 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1278 }
1279 break;
1280
1281 case WM_KEYDOWN:
1282 SCROLL_HandleKbdEvent(hwnd, wParam, lParam);
1283 break;
1284
1285 case WM_KEYUP:
1286 ShowCaret(hwnd);
1287 break;
1288
1289 case WM_SETFOCUS:
1290 {
1291 /* Create a caret when a ScrollBar get focus */
1292 RECT rect;
1293 int arrowSize, thumbSize, thumbPos, vertical;
1294 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1295 &arrowSize, &thumbSize, &thumbPos );
1296 if (!vertical)
1297 {
1298 CreateCaret(hwnd, (HBITMAP)1, thumbSize-2, rect.bottom-rect.top-2);
1299 SetCaretPos(thumbPos+1, rect.top+1);
1300 }
1301 else
1302 {
1303 CreateCaret(hwnd, (HBITMAP)1, rect.right-rect.left-2,thumbSize-2);
1304 SetCaretPos(rect.top+1, thumbPos+1);
1305 }
1306 ShowCaret(hwnd);
1307 }
1308 break;
1309
1310 case WM_KILLFOCUS:
1311 {
1312 RECT rect;
1313 int arrowSize, thumbSize, thumbPos, vertical;
1314 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1315 if (!vertical){
1316 rect.left=thumbPos+1;
1317 rect.right=rect.left+thumbSize;
1318 }
1319 else
1320 {
1321 rect.top=thumbPos+1;
1322 rect.bottom=rect.top+thumbSize;
1323 }
1324 HideCaret(hwnd);
1325 InvalidateRect(hwnd,&rect,0);
1326 DestroyCaret();
1327 }
1328 break;
1329
1330 case WM_ERASEBKGND:
1331 return 1;
1332
1333 case WM_GETDLGCODE:
1334 return DLGC_WANTARROWS; /* Windows returns this value */
1335
1336 case WM_PAINT:
1337 {
1338 PAINTSTRUCT ps;
1339 HDC hdc = wParam ? (HDC)wParam : BeginPaint(hwnd, &ps);
1340 if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEGRIP)
1341 {
1342 SCROLL_DrawSizeGrip( hwnd, hdc);
1343 }
1344 else if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEBOX)
1345 {
1346 RECT rc;
1347 GetClientRect( hwnd, &rc );
1348 FillRect( hdc, &rc, GetSysColorBrush(COLOR_SCROLLBAR) );
1349 }
1350 else
1351 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1352 if (!wParam) EndPaint(hwnd, &ps);
1353 }
1354 break;
1355
1356 case SBM_SETPOS16:
1357 case SBM_SETPOS:
1358 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1359
1360 case SBM_GETPOS16:
1361 case SBM_GETPOS:
1362 return SCROLL_GetScrollPos(hwnd, SB_CTL);
1363
1364 case SBM_SETRANGE16:
1365 if (wParam) message = SBM_SETRANGEREDRAW;
1366 wParam = LOWORD(lParam);
1367 lParam = HIWORD(lParam);
1368 /* fall through */
1369 case SBM_SETRANGEREDRAW:
1370 case SBM_SETRANGE:
1371 {
1372 INT oldPos = SCROLL_GetScrollPos( hwnd, SB_CTL );
1373 SCROLL_SetScrollRange( hwnd, SB_CTL, wParam, lParam );
1374 if (message == SBM_SETRANGEREDRAW)
1375 SCROLL_RefreshScrollBar( hwnd, SB_CTL, TRUE, TRUE );
1376 if (oldPos != SCROLL_GetScrollPos( hwnd, SB_CTL )) return oldPos;
1377 }
1378 return 0;
1379
1380 case SBM_GETRANGE16:
1381 {
1382 INT min, max;
1383
1384 SCROLL_GetScrollRange(hwnd, SB_CTL, &min, &max);
1385 return MAKELRESULT(min, max);
1386 }
1387
1388 case SBM_GETRANGE:
1389 return SCROLL_GetScrollRange(hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam);
1390
1391 case SBM_ENABLE_ARROWS16:
1392 case SBM_ENABLE_ARROWS:
1393 return EnableScrollBar( hwnd, SB_CTL, wParam );
1394
1395 case SBM_SETSCROLLINFO:
1396 return SCROLL_SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1397
1398 case SBM_GETSCROLLINFO:
1399 return SCROLL_GetScrollInfo(hwnd, SB_CTL, (SCROLLINFO *)lParam);
1400
1401 case 0x00e5:
1402 case 0x00e7:
1403 case 0x00e8:
1404 case 0x00eb:
1405 case 0x00ec:
1406 case 0x00ed:
1407 case 0x00ee:
1408 case 0x00ef:
1409 ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1410 message, wParam, lParam );
1411 break;
1412
1413 default:
1414 if (message >= WM_USER)
1415 WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1416 message, wParam, lParam );
1417 return DefWindowProcW( hwnd, message, wParam, lParam );
1418 }
1419 return 0;
1420 }
1421
1422
1423 /*************************************************************************
1424 * SetScrollInfo (USER32.@)
1425 * SetScrollInfo can be used to set the position, upper bound,
1426 * lower bound, and page size of a scrollbar control.
1427 *
1428 * RETURNS
1429 * Scrollbar position
1430 *
1431 * NOTE
1432 * For 100 lines of text to be displayed in a window of 25 lines,
1433 * one would for instance use info->nMin=0, info->nMax=75
1434 * (corresponding to the 76 different positions of the window on
1435 * the text), and info->nPage=25.
1436 */
1437 INT WINAPI SetScrollInfo(
1438 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1439 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1440 const SCROLLINFO *info /* [in] Specifies what to change and new values */,
1441 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1442 {
1443 TRACE("hwnd=%p nBar=%d info=%p, bRedraw=%d\n", hwnd, nBar, info, bRedraw);
1444
1445 /* Refer SB_CTL requests to the window */
1446 if (nBar == SB_CTL)
1447 return SendMessageW(hwnd, SBM_SETSCROLLINFO, bRedraw, (LPARAM)info);
1448 else
1449 return SCROLL_SetScrollInfo( hwnd, nBar, info, bRedraw );
1450 }
1451
1452 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar, const SCROLLINFO *info, BOOL bRedraw )
1453 {
1454 /* Update the scrollbar state and set action flags according to
1455 * what has to be done graphics wise. */
1456
1457 SCROLLBAR_INFO *infoPtr;
1458 UINT new_flags;
1459 BOOL bChangeParams = FALSE; /* don't show/hide scrollbar if params don't change */
1460 INT action = 0;
1461
1462 if (!(infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar))) return 0;
1463 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1464 if ((info->cbSize != sizeof(*info)) &&
1465 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1466
1467 if (TRACE_ON(scroll))
1468 {
1469 TRACE("hwnd=%p bar=%d", hwnd, nBar);
1470 if (info->fMask & SIF_PAGE) TRACE( " page=%d", info->nPage );
1471 if (info->fMask & SIF_POS) TRACE( " pos=%d", info->nPos );
1472 if (info->fMask & SIF_RANGE) TRACE( " min=%d max=%d", info->nMin, info->nMax );
1473 TRACE("\n");
1474 }
1475
1476 /* Set the page size */
1477
1478 if (info->fMask & SIF_PAGE)
1479 {
1480 if( infoPtr->page != info->nPage )
1481 {
1482 infoPtr->page = info->nPage;
1483 action |= SA_SSI_REFRESH;
1484 bChangeParams = TRUE;
1485 }
1486 }
1487
1488 /* Set the scroll pos */
1489
1490 if (info->fMask & SIF_POS)
1491 {
1492 if( infoPtr->curVal != info->nPos )
1493 {
1494 infoPtr->curVal = info->nPos;
1495 action |= SA_SSI_REFRESH;
1496 }
1497 }
1498
1499 /* Set the scroll range */
1500
1501 if (info->fMask & SIF_RANGE)
1502 {
1503 /* Invalid range -> range is set to (0,0) */
1504 if ((info->nMin > info->nMax) ||
1505 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1506 {
1507 infoPtr->minVal = 0;
1508 infoPtr->maxVal = 0;
1509 bChangeParams = TRUE;
1510 }
1511 else
1512 {
1513 if( infoPtr->minVal != info->nMin ||
1514 infoPtr->maxVal != info->nMax )
1515 {
1516 action |= SA_SSI_REFRESH;
1517 infoPtr->minVal = info->nMin;
1518 infoPtr->maxVal = info->nMax;
1519 bChangeParams = TRUE;
1520 }
1521 }
1522 }
1523
1524 /* Make sure the page size is valid */
1525
1526 if (infoPtr->page < 0) infoPtr->page = 0;
1527 else if (infoPtr->page > infoPtr->maxVal - infoPtr->minVal + 1 )
1528 infoPtr->page = infoPtr->maxVal - infoPtr->minVal + 1;
1529
1530 /* Make sure the pos is inside the range */
1531
1532 if (infoPtr->curVal < infoPtr->minVal)
1533 infoPtr->curVal = infoPtr->minVal;
1534 else if (infoPtr->curVal > infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1535 infoPtr->curVal = infoPtr->maxVal - max( infoPtr->page-1, 0 );
1536
1537 TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1538 infoPtr->page, infoPtr->curVal,
1539 infoPtr->minVal, infoPtr->maxVal );
1540
1541 /* don't change the scrollbar state if SetScrollInfo
1542 * is just called with SIF_DISABLENOSCROLL
1543 */
1544 if(!(info->fMask & SIF_ALL)) goto done;
1545
1546 /* Check if the scrollbar should be hidden or disabled */
1547
1548 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1549 {
1550 new_flags = infoPtr->flags;
1551 if (infoPtr->minVal >= infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1552 {
1553 /* Hide or disable scroll-bar */
1554 if (info->fMask & SIF_DISABLENOSCROLL)
1555 {
1556 new_flags = ESB_DISABLE_BOTH;
1557 action |= SA_SSI_REFRESH;
1558 }
1559 else if ((nBar != SB_CTL) && bChangeParams)
1560 {
1561 action = SA_SSI_HIDE;
1562 goto done;
1563 }
1564 }
1565 else /* Show and enable scroll-bar */
1566 {
1567 new_flags = 0;
1568 if ((nBar != SB_CTL) && bChangeParams)
1569 action |= SA_SSI_SHOW;
1570 }
1571
1572 if (infoPtr->flags != new_flags) /* check arrow flags */
1573 {
1574 infoPtr->flags = new_flags;
1575 action |= SA_SSI_REPAINT_ARROWS;
1576 }
1577 }
1578
1579 done:
1580 if( action & SA_SSI_HIDE )
1581 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1582 else
1583 {
1584 if( action & SA_SSI_SHOW )
1585 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1586 return infoPtr->curVal; /* SetWindowPos() already did the painting */
1587
1588 if( bRedraw )
1589 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1590 else if( action & SA_SSI_REPAINT_ARROWS )
1591 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1592 }
1593
1594 /* Return current position */
1595 return infoPtr->curVal;
1596 }
1597
1598
1599 /*************************************************************************
1600 * GetScrollInfo (USER32.@)
1601 *
1602 * GetScrollInfo can be used to retrieve the position, upper bound,
1603 * lower bound, and page size of a scrollbar control.
1604 *
1605 * RETURNS STD
1606 */
1607 BOOL WINAPI GetScrollInfo(
1608 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1609 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1610 LPSCROLLINFO info /* [in/out] (fMask specifies which values to retrieve) */)
1611 {
1612 TRACE("hwnd=%p nBar=%d info=%p\n", hwnd, nBar, info);
1613
1614 /* Refer SB_CTL requests to the window */
1615 if (nBar == SB_CTL)
1616 SendMessageW(hwnd, SBM_GETSCROLLINFO, (WPARAM)0, (LPARAM)info);
1617 else
1618 SCROLL_GetScrollInfo(hwnd, nBar, info);
1619
1620 return TRUE;
1621 }
1622
1623
1624 /*************************************************************************
1625 * SetScrollPos (USER32.@)
1626 *
1627 * RETURNS
1628 * Success: Scrollbar position
1629 * Failure: 0
1630 *
1631 * REMARKS
1632 * Note the ambiguity when 0 is returned. Use GetLastError
1633 * to make sure there was an error (and to know which one).
1634 */
1635 INT WINAPI SetScrollPos(
1636 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1637 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1638 INT nPos /* [in] New value */,
1639 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */ )
1640 {
1641 SCROLLINFO info;
1642 SCROLLBAR_INFO *infoPtr;
1643 INT oldPos;
1644
1645 if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar ))) return 0;
1646 oldPos = infoPtr->curVal;
1647 info.cbSize = sizeof(info);
1648 info.nPos = nPos;
1649 info.fMask = SIF_POS;
1650 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1651 return oldPos;
1652 }
1653
1654
1655 /*************************************************************************
1656 * GetScrollPos (USER32.@)
1657 *
1658 * RETURNS
1659 * Success: Current position
1660 * Failure: 0
1661 *
1662 * REMARKS
1663 * There is ambiguity when 0 is returned. Use GetLastError
1664 * to make sure there was an error (and to know which one).
1665 */
1666 INT WINAPI GetScrollPos(
1667 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1668 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1669 {
1670 TRACE("hwnd=%p nBar=%d\n", hwnd, nBar);
1671
1672 /* Refer SB_CTL requests to the window */
1673 if (nBar == SB_CTL)
1674 return SendMessageW(hwnd, SBM_GETPOS, (WPARAM)0, (LPARAM)0);
1675 else
1676 return SCROLL_GetScrollPos(hwnd, nBar);
1677 }
1678
1679
1680 /*************************************************************************
1681 * SetScrollRange (USER32.@)
1682 *
1683 * RETURNS STD
1684 */
1685 BOOL WINAPI SetScrollRange(
1686 HWND hwnd, /* [in] Handle of window whose scrollbar will be affected */
1687 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1688 INT minVal, /* [in] New minimum value */
1689 INT maxVal, /* [in] New maximum value */
1690 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1691 {
1692 SCROLLINFO info;
1693
1694 TRACE("hwnd=%p nBar=%d min=%d max=%d, bRedraw=%d\n", hwnd, nBar, minVal, maxVal, bRedraw);
1695
1696 info.cbSize = sizeof(info);
1697 info.fMask = SIF_RANGE;
1698 info.nMin = minVal;
1699 info.nMax = maxVal;
1700 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1701 return TRUE;
1702 }
1703
1704
1705 /*************************************************************************
1706 * SCROLL_SetNCSbState
1707 *
1708 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1709 */
1710 INT SCROLL_SetNCSbState(HWND hwnd, int vMin, int vMax, int vPos,
1711 int hMin, int hMax, int hPos)
1712 {
1713 SCROLLINFO vInfo, hInfo;
1714
1715 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1716 vInfo.nMin = vMin;
1717 vInfo.nMax = vMax;
1718 vInfo.nPos = vPos;
1719 hInfo.nMin = hMin;
1720 hInfo.nMax = hMax;
1721 hInfo.nPos = hPos;
1722 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1723
1724 SCROLL_SetScrollInfo( hwnd, SB_VERT, &vInfo, TRUE );
1725 SCROLL_SetScrollInfo( hwnd, SB_HORZ, &hInfo, TRUE );
1726
1727 return 0;
1728 }
1729
1730
1731 /*************************************************************************
1732 * GetScrollRange (USER32.@)
1733 *
1734 * RETURNS STD
1735 */
1736 BOOL WINAPI GetScrollRange(
1737 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1738 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1739 LPINT lpMin /* [out] Where to store minimum value */,
1740 LPINT lpMax /* [out] Where to store maximum value */)
1741 {
1742 TRACE("hwnd=%p nBar=%d lpMin=%p lpMax=%p\n", hwnd, nBar, lpMin, lpMax);
1743
1744 /* Refer SB_CTL requests to the window */
1745 if (nBar == SB_CTL)
1746 SendMessageW(hwnd, SBM_GETRANGE, (WPARAM)lpMin, (LPARAM)lpMax);
1747 else
1748 SCROLL_GetScrollRange(hwnd, nBar, lpMin, lpMax);
1749
1750 return TRUE;
1751 }
1752
1753
1754 /*************************************************************************
1755 * SCROLL_ShowScrollBar()
1756 *
1757 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1758 */
1759 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1760 BOOL fShowH, BOOL fShowV )
1761 {
1762 LONG style = GetWindowLongW( hwnd, GWL_STYLE );
1763
1764 TRACE("hwnd=%p bar=%d horz=%d, vert=%d\n", hwnd, nBar, fShowH, fShowV );
1765
1766 switch(nBar)
1767 {
1768 case SB_CTL:
1769 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1770 return TRUE;
1771
1772 case SB_BOTH:
1773 case SB_HORZ:
1774 if (fShowH)
1775 {
1776 fShowH = !(style & WS_HSCROLL);
1777 style |= WS_HSCROLL;
1778 }
1779 else /* hide it */
1780 {
1781 fShowH = (style & WS_HSCROLL);
1782 style &= ~WS_HSCROLL;
1783 }
1784 if( nBar == SB_HORZ ) {
1785 fShowV = FALSE;
1786 break;
1787 }
1788 /* fall through */
1789
1790 case SB_VERT:
1791 if (fShowV)
1792 {
1793 fShowV = !(style & WS_VSCROLL);
1794 style |= WS_VSCROLL;
1795 }
1796 else /* hide it */
1797 {
1798 fShowV = (style & WS_VSCROLL);
1799 style &= ~WS_VSCROLL;
1800 }
1801 if ( nBar == SB_VERT )
1802 fShowH = FALSE;
1803 break;
1804
1805 default:
1806 return FALSE; /* Nothing to do! */
1807 }
1808
1809 if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1810 {
1811 WIN_SetStyle( hwnd, style );
1812 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1813 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1814 return TRUE;
1815 }
1816 return FALSE; /* no frame changes */
1817 }
1818
1819
1820 /*************************************************************************
1821 * ShowScrollBar (USER32.@)
1822 *
1823 * RETURNS STD
1824 */
1825 BOOL WINAPI ShowScrollBar(
1826 HWND hwnd, /* [in] Handle of window whose scrollbar(s) will be affected */
1827 INT nBar, /* [in] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1828 BOOL fShow /* [in] TRUE = show, FALSE = hide */)
1829 {
1830 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1831 (nBar == SB_HORZ) ? 0 : fShow );
1832 return TRUE;
1833 }
1834
1835
1836 /*************************************************************************
1837 * EnableScrollBar (USER32.@)
1838 */
1839 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1840 {
1841 BOOL bFineWithMe;
1842 SCROLLBAR_INFO *infoPtr;
1843
1844 TRACE("%p %d %d\n", hwnd, nBar, flags );
1845
1846 flags &= ESB_DISABLE_BOTH;
1847
1848 if (nBar == SB_BOTH)
1849 {
1850 if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, SB_VERT ))) return FALSE;
1851 if (!(bFineWithMe = (infoPtr->flags == flags)) )
1852 {
1853 infoPtr->flags = flags;
1854 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1855 }
1856 nBar = SB_HORZ;
1857 }
1858 else
1859 bFineWithMe = TRUE;
1860
1861 if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar ))) return FALSE;
1862 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1863 infoPtr->flags = flags;
1864
1865 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1866 return TRUE;
1867 }
Windows API implementation