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Handle errors in std marshaller better, do not crash.
[wine.git] / controls / scroll.c
bloba3d999e087a103fe0b66ae818550241d52c061dc
1 /*
2 * Scrollbar control
3 *
4 * Copyright 1993 Martin Ayotte
5 * Copyright 1994, 1996 Alexandre Julliard
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22 #include "windef.h"
23 #include "wingdi.h"
24 #include "wine/winuser16.h"
25 #include "controls.h"
26 #include "win.h"
27 #include "wine/debug.h"
28 #include "user.h"
29 #include "spy.h"
30
31 WINE_DEFAULT_DEBUG_CHANNEL(scroll);
32
33 typedef struct
34 {
35 INT curVal; /* Current scroll-bar value */
36 INT minVal; /* Minimum scroll-bar value */
37 INT maxVal; /* Maximum scroll-bar value */
38 INT page; /* Page size of scroll bar (Win32) */
39 UINT flags; /* EnableScrollBar flags */
40 } SCROLLBAR_INFO;
41
42
43 static HBITMAP hUpArrow;
44 static HBITMAP hDnArrow;
45 static HBITMAP hLfArrow;
46 static HBITMAP hRgArrow;
47 static HBITMAP hUpArrowD;
48 static HBITMAP hDnArrowD;
49 static HBITMAP hLfArrowD;
50 static HBITMAP hRgArrowD;
51 static HBITMAP hUpArrowI;
52 static HBITMAP hDnArrowI;
53 static HBITMAP hLfArrowI;
54 static HBITMAP hRgArrowI;
55
56 #define TOP_ARROW(flags,pressed) \
57 (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
58 #define BOTTOM_ARROW(flags,pressed) \
59 (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
60 #define LEFT_ARROW(flags,pressed) \
61 (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
62 #define RIGHT_ARROW(flags,pressed) \
63 (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
64
65
66 /* Minimum size of the rectangle between the arrows */
67 #define SCROLL_MIN_RECT 4
68
69 /* Minimum size of the thumb in pixels */
70 #define SCROLL_MIN_THUMB 6
71
72 /* Overlap between arrows and thumb */
73 #define SCROLL_ARROW_THUMB_OVERLAP ((TWEAK_WineLook == WIN31_LOOK) ? 1 : 0)
74
75 /* Delay (in ms) before first repetition when holding the button down */
76 #define SCROLL_FIRST_DELAY 200
77
78 /* Delay (in ms) between scroll repetitions */
79 #define SCROLL_REPEAT_DELAY 50
80
81 /* Scroll timer id */
82 #define SCROLL_TIMER 0
83
84 /* Scroll-bar hit testing */
85 enum SCROLL_HITTEST
86 {
87 SCROLL_NOWHERE, /* Outside the scroll bar */
88 SCROLL_TOP_ARROW, /* Top or left arrow */
89 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
90 SCROLL_THUMB, /* Thumb rectangle */
91 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
92 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
93 };
94
95 /* What to do after SCROLL_SetScrollInfo() */
96 #define SA_SSI_HIDE 0x0001
97 #define SA_SSI_SHOW 0x0002
98 #define SA_SSI_REFRESH 0x0004
99 #define SA_SSI_REPAINT_ARROWS 0x0008
100
101 /* Thumb-tracking info */
102 static HWND SCROLL_TrackingWin = 0;
103 static INT SCROLL_TrackingBar = 0;
104 static INT SCROLL_TrackingPos = 0;
105 static INT SCROLL_TrackingVal = 0;
106 /* Hit test code of the last button-down event */
107 static enum SCROLL_HITTEST SCROLL_trackHitTest;
108 static BOOL SCROLL_trackVertical;
109
110 /* Is the moving thumb being displayed? */
111 static BOOL SCROLL_MovingThumb = FALSE;
112
113 /* Local functions */
114 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
115 BOOL fShowH, BOOL fShowV );
116 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
117 const SCROLLINFO *info, INT *action );
118 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
119 RECT *rect, INT arrowSize,
120 INT thumbSize, INT thumbPos,
121 UINT flags, BOOL vertical,
122 BOOL top_selected, BOOL bottom_selected );
123 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
124
125
126 /*********************************************************************
127 * scrollbar class descriptor
128 */
129 const struct builtin_class_descr SCROLL_builtin_class =
130 {
131 "ScrollBar", /* name */
132 CS_GLOBALCLASS | CS_DBLCLKS | CS_VREDRAW | CS_HREDRAW | CS_PARENTDC, /* style */
133 NULL, /* procA (winproc is Unicode only) */
134 ScrollBarWndProc, /* procW */
135 sizeof(SCROLLBAR_INFO), /* extra */
136 IDC_ARROWA, /* cursor */
137 0 /* brush */
138 };
139
140
141 /***********************************************************************
142 * SCROLL_LoadBitmaps
143 */
144 static void SCROLL_LoadBitmaps(void)
145 {
146 hUpArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
147 hDnArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
148 hLfArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
149 hRgArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
150 hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
151 hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
152 hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
153 hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
154 hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
155 hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
156 hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
157 hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
158 }
159
160
161 /***********************************************************************
162 * SCROLL_GetScrollInfo
163 */
164 static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND hwnd, INT nBar )
165 {
166 SCROLLBAR_INFO *infoPtr;
167 WND *wndPtr = WIN_FindWndPtr( hwnd );
168
169 if (!wndPtr) return NULL;
170 switch(nBar)
171 {
172 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
173 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
174 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
175 default:
176 WIN_ReleaseWndPtr( wndPtr );
177 return NULL;
178 }
179
180 if (!infoPtr) /* Create the info structure if needed */
181 {
182 if ((infoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(SCROLLBAR_INFO) )))
183 {
184 infoPtr->minVal = infoPtr->curVal = infoPtr->page = 0;
185 infoPtr->maxVal = 100;
186 infoPtr->flags = ESB_ENABLE_BOTH;
187 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
188 else wndPtr->pVScroll = infoPtr;
189 }
190 if (!hUpArrow) SCROLL_LoadBitmaps();
191 }
192 WIN_ReleaseWndPtr( wndPtr );
193 return infoPtr;
194 }
195
196
197 /***********************************************************************
198 * SCROLL_GetScrollBarRect
199 *
200 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
201 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
202 * 'arrowSize' returns the width or height of an arrow (depending on
203 * the orientation of the scrollbar), 'thumbSize' returns the size of
204 * the thumb, and 'thumbPos' returns the position of the thumb
205 * relative to the left or to the top.
206 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
207 */
208 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
209 INT *arrowSize, INT *thumbSize,
210 INT *thumbPos )
211 {
212 INT pixels;
213 BOOL vertical;
214 WND *wndPtr = WIN_FindWndPtr( hwnd );
215
216 switch(nBar)
217 {
218 case SB_HORZ:
219 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
220 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
221 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
222 lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
223 if(wndPtr->dwStyle & WS_BORDER) {
224 lprect->left--;
225 lprect->right++;
226 } else if(wndPtr->dwStyle & WS_VSCROLL)
227 lprect->right++;
228 vertical = FALSE;
229 break;
230
231 case SB_VERT:
232 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
233 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
234 lprect->right = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
235 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
236 if(wndPtr->dwStyle & WS_BORDER) {
237 lprect->top--;
238 lprect->bottom++;
239 } else if(wndPtr->dwStyle & WS_HSCROLL)
240 lprect->bottom++;
241 vertical = TRUE;
242 break;
243
244 case SB_CTL:
245 GetClientRect( hwnd, lprect );
246 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
247 break;
248
249 default:
250 WIN_ReleaseWndPtr(wndPtr);
251 return FALSE;
252 }
253
254 if (vertical) pixels = lprect->bottom - lprect->top;
255 else pixels = lprect->right - lprect->left;
256
257 if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
258 {
259 if (pixels > SCROLL_MIN_RECT)
260 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
261 else
262 *arrowSize = 0;
263 *thumbPos = *thumbSize = 0;
264 }
265 else
266 {
267 SCROLLBAR_INFO *info = SCROLL_GetScrollInfo( hwnd, nBar );
268
269 *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
270 pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
271
272 if (info->page)
273 {
274 *thumbSize = MulDiv(pixels,info->page,(info->maxVal-info->minVal+1));
275 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
276 }
277 else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
278
279 if (((pixels -= *thumbSize ) < 0) ||
280 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
281 {
282 /* Rectangle too small or scrollbar disabled -> no thumb */
283 *thumbPos = *thumbSize = 0;
284 }
285 else
286 {
287 INT max = info->maxVal - max( info->page-1, 0 );
288 if (info->minVal >= max)
289 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
290 else
291 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
292 + MulDiv(pixels, (info->curVal-info->minVal),(max - info->minVal));
293 }
294 }
295 WIN_ReleaseWndPtr(wndPtr);
296 return vertical;
297 }
298
299
300 /***********************************************************************
301 * SCROLL_GetThumbVal
302 *
303 * Compute the current scroll position based on the thumb position in pixels
304 * from the top of the scroll-bar.
305 */
306 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
307 BOOL vertical, INT pos )
308 {
309 INT thumbSize;
310 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
311
312 if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
313 return infoPtr->minVal;
314
315 if (infoPtr->page)
316 {
317 thumbSize = MulDiv(pixels,infoPtr->page,(infoPtr->maxVal-infoPtr->minVal+1));
318 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
319 }
320 else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
321
322 if ((pixels -= thumbSize) <= 0) return infoPtr->minVal;
323
324 pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
325 if (pos > pixels) pos = pixels;
326
327 if (!infoPtr->page) pos *= infoPtr->maxVal - infoPtr->minVal;
328 else pos *= infoPtr->maxVal - infoPtr->minVal - infoPtr->page + 1;
329 return infoPtr->minVal + ((pos + pixels / 2) / pixels);
330 }
331
332 /***********************************************************************
333 * SCROLL_PtInRectEx
334 */
335 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
336 {
337 RECT rect = *lpRect;
338
339 if (vertical)
340 {
341 rect.left -= lpRect->right - lpRect->left;
342 rect.right += lpRect->right - lpRect->left;
343 }
344 else
345 {
346 rect.top -= lpRect->bottom - lpRect->top;
347 rect.bottom += lpRect->bottom - lpRect->top;
348 }
349 return PtInRect( &rect, pt );
350 }
351
352 /***********************************************************************
353 * SCROLL_ClipPos
354 */
355 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
356 {
357 if( pt.x < lpRect->left )
358 pt.x = lpRect->left;
359 else
360 if( pt.x > lpRect->right )
361 pt.x = lpRect->right;
362
363 if( pt.y < lpRect->top )
364 pt.y = lpRect->top;
365 else
366 if( pt.y > lpRect->bottom )
367 pt.y = lpRect->bottom;
368
369 return pt;
370 }
371
372
373 /***********************************************************************
374 * SCROLL_HitTest
375 *
376 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
377 */
378 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
379 POINT pt, BOOL bDragging )
380 {
381 INT arrowSize, thumbSize, thumbPos;
382 RECT rect;
383
384 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
385 &arrowSize, &thumbSize, &thumbPos );
386
387 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
388 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
389
390 if (vertical)
391 {
392 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
393 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
394 if (!thumbPos) return SCROLL_TOP_RECT;
395 pt.y -= rect.top;
396 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
397 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
398 }
399 else /* horizontal */
400 {
401 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
402 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
403 if (!thumbPos) return SCROLL_TOP_RECT;
404 pt.x -= rect.left;
405 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
406 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
407 }
408 return SCROLL_THUMB;
409 }
410
411
412 /***********************************************************************
413 * SCROLL_DrawArrows
414 *
415 * Draw the scroll bar arrows.
416 */
417 static void SCROLL_DrawArrows_9x( HDC hdc, SCROLLBAR_INFO *infoPtr,
418 RECT *rect, INT arrowSize, BOOL vertical,
419 BOOL top_pressed, BOOL bottom_pressed )
420 {
421 RECT r;
422
423 r = *rect;
424 if( vertical )
425 r.bottom = r.top + arrowSize;
426 else
427 r.right = r.left + arrowSize;
428
429 DrawFrameControl( hdc, &r, DFC_SCROLL,
430 (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
431 | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
432 | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
433
434 r = *rect;
435 if( vertical )
436 r.top = r.bottom-arrowSize;
437 else
438 r.left = r.right-arrowSize;
439
440 DrawFrameControl( hdc, &r, DFC_SCROLL,
441 (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
442 | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
443 | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
444 }
445
446 static void SCROLL_DrawArrows_31( HDC hdc, SCROLLBAR_INFO *infoPtr,
447 RECT *rect, INT arrowSize, BOOL vertical,
448 BOOL top_pressed, BOOL bottom_pressed )
449 {
450 HDC hdcMem = CreateCompatibleDC( hdc );
451 HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
452 TOP_ARROW(infoPtr->flags, top_pressed)
453 : LEFT_ARROW(infoPtr->flags, top_pressed));
454
455 SetStretchBltMode( hdc, STRETCH_DELETESCANS );
456 StretchBlt( hdc, rect->left, rect->top,
457 vertical ? rect->right-rect->left : arrowSize,
458 vertical ? arrowSize : rect->bottom-rect->top,
459 hdcMem, 0, 0,
460 GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
461 SRCCOPY );
462
463 SelectObject( hdcMem, vertical ?
464 BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
465 : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
466 if (vertical)
467 StretchBlt( hdc, rect->left, rect->bottom - arrowSize,
468 rect->right - rect->left, arrowSize,
469 hdcMem, 0, 0,
470 GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
471 SRCCOPY );
472 else
473 StretchBlt( hdc, rect->right - arrowSize, rect->top,
474 arrowSize, rect->bottom - rect->top,
475 hdcMem, 0, 0,
476 GetSystemMetrics(SM_CXVSCROLL), GetSystemMetrics(SM_CYHSCROLL),
477 SRCCOPY );
478 SelectObject( hdcMem, hbmpPrev );
479 DeleteDC( hdcMem );
480 }
481
482 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
483 RECT *rect, INT arrowSize, BOOL vertical,
484 BOOL top_pressed, BOOL bottom_pressed )
485 {
486 if( TWEAK_WineLook == WIN31_LOOK )
487 SCROLL_DrawArrows_31( hdc, infoPtr, rect, arrowSize,
488 vertical, top_pressed,bottom_pressed );
489 else
490 SCROLL_DrawArrows_9x( hdc, infoPtr, rect, arrowSize,
491 vertical, top_pressed,bottom_pressed );
492 }
493
494
495 /***********************************************************************
496 * SCROLL_DrawMovingThumb
497 *
498 * Draw the moving thumb rectangle.
499 */
500 static void SCROLL_DrawMovingThumb_31( HDC hdc, RECT *rect, BOOL vertical,
501 INT arrowSize, INT thumbSize )
502 {
503 RECT r = *rect;
504 if (vertical)
505 {
506 r.top += SCROLL_TrackingPos;
507 if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
508 r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
509 if (r.top + thumbSize >
510 rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
511 r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
512 - thumbSize;
513 r.bottom = r.top + thumbSize;
514 }
515 else
516 {
517 r.left += SCROLL_TrackingPos;
518 if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
519 r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
520 if (r.left + thumbSize >
521 rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
522 r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
523 - thumbSize;
524 r.right = r.left + thumbSize;
525 }
526
527 DrawFocusRect( hdc, &r );
528 SCROLL_MovingThumb = !SCROLL_MovingThumb;
529 }
530
531 static void SCROLL_DrawMovingThumb_9x( HDC hdc, RECT *rect, BOOL vertical,
532 INT arrowSize, INT thumbSize )
533 {
534 INT pos = SCROLL_TrackingPos;
535 INT max_size;
536
537 if( vertical )
538 max_size = rect->bottom - rect->top;
539 else
540 max_size = rect->right - rect->left;
541
542 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
543
544 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
545 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
546 else if( pos > max_size )
547 pos = max_size;
548
549 SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
550 rect, arrowSize, thumbSize, pos,
551 0, vertical, FALSE, FALSE );
552
553 SCROLL_MovingThumb = !SCROLL_MovingThumb;
554 }
555
556 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
557 INT arrowSize, INT thumbSize )
558 {
559 if( TWEAK_WineLook == WIN31_LOOK )
560 SCROLL_DrawMovingThumb_31( hdc, rect, vertical, arrowSize, thumbSize );
561 else
562 SCROLL_DrawMovingThumb_9x( hdc, rect, vertical, arrowSize, thumbSize );
563 }
564
565 /***********************************************************************
566 * SCROLL_DrawInterior
567 *
568 * Draw the scroll bar interior (everything except the arrows).
569 */
570 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
571 RECT *rect, INT arrowSize,
572 INT thumbSize, INT thumbPos,
573 UINT flags, BOOL vertical,
574 BOOL top_selected, BOOL bottom_selected )
575 {
576 RECT r;
577 HPEN hSavePen;
578 HBRUSH hSaveBrush,hBrush;
579
580 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
581 * The window-owned scrollbars need to call DEFWND_ControlColor
582 * to correctly setup default scrollbar colors
583 */
584 if (nBar == SB_CTL)
585 {
586 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
587 (WPARAM)hdc,(LPARAM)hwnd);
588 }
589 else
590 {
591 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
592 }
593
594 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
595 hSaveBrush = SelectObject( hdc, hBrush );
596
597 /* Calculate the scroll rectangle */
598 r = *rect;
599 if (vertical)
600 {
601 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
602 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
603 }
604 else
605 {
606 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
607 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
608 }
609
610 /* Draw the scroll rectangles and thumb */
611 if (!thumbPos) /* No thumb to draw */
612 {
613 PatBlt( hdc, r.left, r.top,
614 r.right - r.left, r.bottom - r.top,
615 PATCOPY );
616
617 /* cleanup and return */
618 SelectObject( hdc, hSavePen );
619 SelectObject( hdc, hSaveBrush );
620 return;
621 }
622
623 if (vertical)
624 {
625 PatBlt( hdc, r.left, r.top,
626 r.right - r.left,
627 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
628 top_selected ? 0x0f0000 : PATCOPY );
629 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
630 PatBlt( hdc, r.left, r.top + thumbSize,
631 r.right - r.left,
632 r.bottom - r.top - thumbSize,
633 bottom_selected ? 0x0f0000 : PATCOPY );
634 r.bottom = r.top + thumbSize;
635 }
636 else /* horizontal */
637 {
638 PatBlt( hdc, r.left, r.top,
639 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
640 r.bottom - r.top,
641 top_selected ? 0x0f0000 : PATCOPY );
642 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
643 PatBlt( hdc, r.left + thumbSize, r.top,
644 r.right - r.left - thumbSize,
645 r.bottom - r.top,
646 bottom_selected ? 0x0f0000 : PATCOPY );
647 r.right = r.left + thumbSize;
648 }
649
650 /* Draw the thumb */
651 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
652
653 /* cleanup */
654 SelectObject( hdc, hSavePen );
655 SelectObject( hdc, hSaveBrush );
656 }
657
658
659 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
660 RECT *rect, INT arrowSize,
661 INT thumbSize, INT thumbPos,
662 UINT flags, BOOL vertical,
663 BOOL top_selected, BOOL bottom_selected )
664 {
665 RECT r;
666 HPEN hSavePen;
667 HBRUSH hSaveBrush,hBrush;
668 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
669
670 if (Save_SCROLL_MovingThumb &&
671 (SCROLL_TrackingWin == hwnd) &&
672 (SCROLL_TrackingBar == nBar))
673 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
674
675 /* Select the correct brush and pen */
676
677 if (TWEAK_WineLook == WIN31_LOOK && (flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
678 {
679 /* This ought to be the color of the parent window */
680 hBrush = GetSysColorBrush(COLOR_WINDOW);
681 }
682 else
683 {
684 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
685 * The window-owned scrollbars need to call DEFWND_ControlColor
686 * to correctly setup default scrollbar colors
687 */
688 if (nBar == SB_CTL) {
689 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
690 (WPARAM)hdc,(LPARAM)hwnd);
691 } else {
692 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
693 }
694 }
695 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
696 hSaveBrush = SelectObject( hdc, hBrush );
697
698 /* Calculate the scroll rectangle */
699
700 r = *rect;
701 if (vertical)
702 {
703 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
704 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
705 }
706 else
707 {
708 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
709 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
710 }
711
712 /* Draw the scroll bar frame */
713
714 /* Only draw outline if Win 3.1. Mar 24, 1999 - Ronald B. Cemer */
715 if (TWEAK_WineLook == WIN31_LOOK)
716 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
717
718 /* Draw the scroll rectangles and thumb */
719
720 if (!thumbPos) /* No thumb to draw */
721 {
722 INT offset = (TWEAK_WineLook > WIN31_LOOK) ? 0 : 1;
723
724 PatBlt( hdc, r.left+offset, r.top+offset,
725 r.right - r.left - 2*offset, r.bottom - r.top - 2*offset,
726 PATCOPY );
727
728 /* cleanup and return */
729 SelectObject( hdc, hSavePen );
730 SelectObject( hdc, hSaveBrush );
731 return;
732 }
733
734 if (vertical)
735 {
736 INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
737
738 PatBlt( hdc, r.left + offset, r.top + offset,
739 r.right - r.left - offset*2,
740 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - offset,
741 top_selected ? 0x0f0000 : PATCOPY );
742 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
743 PatBlt( hdc, r.left + offset, r.top + thumbSize,
744 r.right - r.left - offset*2,
745 r.bottom - r.top - thumbSize - offset,
746 bottom_selected ? 0x0f0000 : PATCOPY );
747 r.bottom = r.top + thumbSize;
748 }
749 else /* horizontal */
750 {
751 INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
752
753 PatBlt( hdc, r.left + offset, r.top + offset,
754 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
755 r.bottom - r.top - offset*2,
756 top_selected ? 0x0f0000 : PATCOPY );
757 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
758 PatBlt( hdc, r.left + thumbSize, r.top + offset,
759 r.right - r.left - thumbSize - offset,
760 r.bottom - r.top - offset*2,
761 bottom_selected ? 0x0f0000 : PATCOPY );
762 r.right = r.left + thumbSize;
763 }
764
765 /* Draw the thumb */
766
767 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
768 if (TWEAK_WineLook == WIN31_LOOK)
769 {
770 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
771 r.top++, r.left++;
772 }
773 else
774 {
775 Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
776 }
777 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
778
779 if (Save_SCROLL_MovingThumb &&
780 (SCROLL_TrackingWin == hwnd) &&
781 (SCROLL_TrackingBar == nBar))
782 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
783
784 /* cleanup */
785 SelectObject( hdc, hSavePen );
786 SelectObject( hdc, hSaveBrush );
787 }
788
789
790 /***********************************************************************
791 * SCROLL_DrawScrollBar
792 *
793 * Redraw the whole scrollbar.
794 */
795 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
796 BOOL arrows, BOOL interior )
797 {
798 INT arrowSize, thumbSize, thumbPos;
799 RECT rect;
800 BOOL vertical;
801 WND *wndPtr = WIN_FindWndPtr( hwnd );
802 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
803 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
804
805 if (!wndPtr || !infoPtr ||
806 ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
807 ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
808 if (!WIN_IsWindowDrawable( hwnd, FALSE )) goto END;
809 hwnd = wndPtr->hwndSelf; /* make it a full handle */
810
811 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
812 &arrowSize, &thumbSize, &thumbPos );
813
814 /* do not draw if the scrollbar rectangle is empty */
815 if(IsRectEmpty(&rect))
816 goto END;
817
818 if (Save_SCROLL_MovingThumb &&
819 (SCROLL_TrackingWin == hwnd) &&
820 (SCROLL_TrackingBar == nBar))
821 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
822
823 /* Draw the arrows */
824
825 if (arrows && arrowSize)
826 {
827 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
828 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
829 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
830 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
831 else
832 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
833 FALSE, FALSE );
834 }
835 if( interior )
836 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
837 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
838
839 if (Save_SCROLL_MovingThumb &&
840 (SCROLL_TrackingWin == hwnd) &&
841 (SCROLL_TrackingBar == nBar))
842 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
843
844 /* if scroll bar has focus, reposition the caret */
845 if(hwnd==GetFocus() && (nBar==SB_CTL))
846 {
847 if (!vertical)
848 {
849 SetCaretPos(thumbPos+1, rect.top+1);
850 }
851 else
852 {
853 SetCaretPos(rect.top+1, thumbPos+1);
854 }
855 }
856
857 END:
858 WIN_ReleaseWndPtr(wndPtr);
859 }
860
861
862 /***********************************************************************
863 * SCROLL_RefreshScrollBar
864 *
865 * Repaint the scroll bar interior after a SetScrollRange() or
866 * SetScrollPos() call.
867 */
868 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
869 BOOL arrows, BOOL interior )
870 {
871 HDC hdc = GetDCEx( hwnd, 0,
872 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
873 if (!hdc) return;
874
875 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
876 ReleaseDC( hwnd, hdc );
877 }
878
879
880 /***********************************************************************
881 * SCROLL_HandleKbdEvent
882 *
883 * Handle a keyboard event (only for SB_CTL scrollbars).
884 */
885 static void SCROLL_HandleKbdEvent( HWND hwnd, WPARAM wParam )
886 {
887 WPARAM msg;
888
889 switch(wParam)
890 {
891 case VK_PRIOR: msg = SB_PAGEUP; break;
892 case VK_NEXT: msg = SB_PAGEDOWN; break;
893 case VK_HOME: msg = SB_TOP; break;
894 case VK_END: msg = SB_BOTTOM; break;
895 case VK_UP: msg = SB_LINEUP; break;
896 case VK_DOWN: msg = SB_LINEDOWN; break;
897 default: return;
898 }
899 SendMessageW( GetParent(hwnd),
900 (GetWindowLongA( hwnd, GWL_STYLE ) & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
901 msg, (LPARAM)hwnd );
902 }
903
904
905 /***********************************************************************
906 * SCROLL_HandleScrollEvent
907 *
908 * Handle a mouse or timer event for the scrollbar.
909 * 'pt' is the location of the mouse event in client (for SB_CTL) or
910 * windows coordinates.
911 */
912 static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
913 {
914 /* Previous mouse position for timer events */
915 static POINT prevPt;
916 /* Thumb position when tracking started. */
917 static UINT trackThumbPos;
918 /* Position in the scroll-bar of the last button-down event. */
919 static INT lastClickPos;
920 /* Position in the scroll-bar of the last mouse event. */
921 static INT lastMousePos;
922
923 enum SCROLL_HITTEST hittest;
924 HWND hwndOwner, hwndCtl;
925 BOOL vertical;
926 INT arrowSize, thumbSize, thumbPos;
927 RECT rect;
928 HDC hdc;
929
930 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
931 if (!infoPtr) return;
932 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
933 return;
934
935 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
936 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
937 &arrowSize, &thumbSize, &thumbPos );
938 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
939 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
940
941 switch(msg)
942 {
943 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
944 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
945 SCROLL_trackVertical = vertical;
946 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
947 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
948 lastMousePos = lastClickPos;
949 trackThumbPos = thumbPos;
950 prevPt = pt;
951 if (nBar == SB_CTL && (GetWindowLongA(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
952 SetCapture( hwnd );
953 break;
954
955 case WM_MOUSEMOVE:
956 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
957 prevPt = pt;
958 break;
959
960 case WM_LBUTTONUP:
961 hittest = SCROLL_NOWHERE;
962 ReleaseCapture();
963 /* if scrollbar has focus, show back caret */
964 if (hwnd==GetFocus()) ShowCaret(hwnd);
965 break;
966
967 case WM_SYSTIMER:
968 pt = prevPt;
969 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
970 break;
971
972 default:
973 return; /* Should never happen */
974 }
975
976 TRACE("Event: hwnd=%04x bar=%d msg=%s pt=%ld,%ld hit=%d\n",
977 hwnd, nBar, SPY_GetMsgName(msg,hwnd), pt.x, pt.y, hittest );
978
979 switch(SCROLL_trackHitTest)
980 {
981 case SCROLL_NOWHERE: /* No tracking in progress */
982 break;
983
984 case SCROLL_TOP_ARROW:
985 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
986 (hittest == SCROLL_trackHitTest), FALSE );
987 if (hittest == SCROLL_trackHitTest)
988 {
989 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
990 {
991 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
992 SB_LINEUP, (LPARAM)hwndCtl );
993 }
994
995 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
996 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
997 (TIMERPROC)0 );
998 }
999 else KillSystemTimer( hwnd, SCROLL_TIMER );
1000 break;
1001
1002 case SCROLL_TOP_RECT:
1003 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1004 thumbPos, infoPtr->flags, vertical,
1005 (hittest == SCROLL_trackHitTest), FALSE );
1006 if (hittest == SCROLL_trackHitTest)
1007 {
1008 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1009 {
1010 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1011 SB_PAGEUP, (LPARAM)hwndCtl );
1012 }
1013 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1014 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1015 (TIMERPROC)0 );
1016 }
1017 else KillSystemTimer( hwnd, SCROLL_TIMER );
1018 break;
1019
1020 case SCROLL_THUMB:
1021 if (msg == WM_LBUTTONDOWN)
1022 {
1023 SCROLL_TrackingWin = hwnd;
1024 SCROLL_TrackingBar = nBar;
1025 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
1026 if (!SCROLL_MovingThumb)
1027 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1028 }
1029 else if (msg == WM_LBUTTONUP)
1030 {
1031 if (SCROLL_MovingThumb)
1032 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1033 SCROLL_TrackingWin = 0;
1034 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1035 thumbPos, infoPtr->flags, vertical,
1036 FALSE, FALSE );
1037 }
1038 else /* WM_MOUSEMOVE */
1039 {
1040 UINT pos;
1041
1042 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
1043 else
1044 {
1045 pt = SCROLL_ClipPos( &rect, pt );
1046 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
1047 }
1048 if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
1049 {
1050 if (SCROLL_MovingThumb)
1051 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1052 arrowSize, thumbSize );
1053 lastMousePos = pos;
1054 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
1055 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1056 vertical,
1057 SCROLL_TrackingPos );
1058 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1059 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1060 (LPARAM)hwndCtl );
1061 if (!SCROLL_MovingThumb)
1062 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1063 arrowSize, thumbSize );
1064 }
1065 }
1066 break;
1067
1068 case SCROLL_BOTTOM_RECT:
1069 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1070 thumbPos, infoPtr->flags, vertical,
1071 FALSE, (hittest == SCROLL_trackHitTest) );
1072 if (hittest == SCROLL_trackHitTest)
1073 {
1074 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1075 {
1076 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1077 SB_PAGEDOWN, (LPARAM)hwndCtl );
1078 }
1079 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1080 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1081 (TIMERPROC)0 );
1082 }
1083 else KillSystemTimer( hwnd, SCROLL_TIMER );
1084 break;
1085
1086 case SCROLL_BOTTOM_ARROW:
1087 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1088 FALSE, (hittest == SCROLL_trackHitTest) );
1089 if (hittest == SCROLL_trackHitTest)
1090 {
1091 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1092 {
1093 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1094 SB_LINEDOWN, (LPARAM)hwndCtl );
1095 }
1096
1097 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1098 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1099 (TIMERPROC)0 );
1100 }
1101 else KillSystemTimer( hwnd, SCROLL_TIMER );
1102 break;
1103 }
1104
1105 if (msg == WM_LBUTTONDOWN)
1106 {
1107
1108 if (hittest == SCROLL_THUMB)
1109 {
1110 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1111 trackThumbPos + lastMousePos - lastClickPos );
1112 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1113 MAKEWPARAM( SB_THUMBTRACK, val ), (LPARAM)hwndCtl );
1114 }
1115 }
1116
1117 if (msg == WM_LBUTTONUP)
1118 {
1119 hittest = SCROLL_trackHitTest;
1120 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1121
1122 if (hittest == SCROLL_THUMB)
1123 {
1124 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1125 trackThumbPos + lastMousePos - lastClickPos );
1126 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1127 MAKEWPARAM( SB_THUMBPOSITION, val ), (LPARAM)hwndCtl );
1128 }
1129 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1130 SB_ENDSCROLL, (LPARAM)hwndCtl );
1131 }
1132
1133 ReleaseDC( hwnd, hdc );
1134 }
1135
1136
1137 /***********************************************************************
1138 * SCROLL_TrackScrollBar
1139 *
1140 * Track a mouse button press on a scroll-bar.
1141 * pt is in screen-coordinates for non-client scroll bars.
1142 */
1143 void SCROLL_TrackScrollBar( HWND hwnd, INT scrollbar, POINT pt )
1144 {
1145 MSG msg;
1146 INT xoffset = 0, yoffset = 0;
1147
1148 if (scrollbar != SB_CTL)
1149 {
1150 WND *wndPtr = WIN_GetPtr( hwnd );
1151 if (!wndPtr || wndPtr == WND_OTHER_PROCESS) return;
1152 xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
1153 yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
1154 WIN_ReleasePtr( wndPtr );
1155 ScreenToClient( hwnd, &pt );
1156 pt.x += xoffset;
1157 pt.y += yoffset;
1158 }
1159
1160 SCROLL_HandleScrollEvent( hwnd, scrollbar, WM_LBUTTONDOWN, pt );
1161
1162 do
1163 {
1164 if (!GetMessageW( &msg, 0, 0, 0 )) break;
1165 if (CallMsgFilterW( &msg, MSGF_SCROLLBAR )) continue;
1166 switch(msg.message)
1167 {
1168 case WM_LBUTTONUP:
1169 case WM_MOUSEMOVE:
1170 case WM_SYSTIMER:
1171 pt.x = LOWORD(msg.lParam) + xoffset;
1172 pt.y = HIWORD(msg.lParam) + yoffset;
1173 SCROLL_HandleScrollEvent( hwnd, scrollbar, msg.message, pt );
1174 break;
1175 default:
1176 TranslateMessage( &msg );
1177 DispatchMessageW( &msg );
1178 break;
1179 }
1180 if (!IsWindow( hwnd ))
1181 {
1182 ReleaseCapture();
1183 break;
1184 }
1185 } while (msg.message != WM_LBUTTONUP);
1186 }
1187
1188
1189 /***********************************************************************
1190 * ScrollBarWndProc
1191 */
1192 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1193 {
1194 if (!IsWindow( hwnd )) return 0;
1195
1196 switch(message)
1197 {
1198 case WM_CREATE:
1199 {
1200 SCROLLBAR_INFO *infoPtr;
1201 CREATESTRUCTW *lpCreat = (CREATESTRUCTW *)lParam;
1202
1203 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_CTL ))) return -1;
1204 if (lpCreat->style & WS_DISABLED)
1205 {
1206 TRACE("Created WS_DISABLED scrollbar\n");
1207 infoPtr->flags = ESB_DISABLE_BOTH;
1208 }
1209
1210 if (lpCreat->style & SBS_SIZEBOX)
1211 {
1212 FIXME("Unimplemented style SBS_SIZEBOX.\n" );
1213 return 0;
1214 }
1215 if (lpCreat->style & SBS_VERT)
1216 {
1217 if (lpCreat->style & SBS_LEFTALIGN)
1218 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1219 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1220 else if (lpCreat->style & SBS_RIGHTALIGN)
1221 MoveWindow( hwnd,
1222 lpCreat->x+lpCreat->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1223 lpCreat->y,
1224 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1225 }
1226 else /* SBS_HORZ */
1227 {
1228 if (lpCreat->style & SBS_TOPALIGN)
1229 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1230 lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1231 else if (lpCreat->style & SBS_BOTTOMALIGN)
1232 MoveWindow( hwnd,
1233 lpCreat->x,
1234 lpCreat->y+lpCreat->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1235 lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1236 }
1237 }
1238 if (!hUpArrow) SCROLL_LoadBitmaps();
1239 TRACE("ScrollBar creation, hwnd=%04x\n", hwnd );
1240 return 0;
1241
1242 case WM_ENABLE:
1243 {
1244 SCROLLBAR_INFO *infoPtr;
1245 if ((infoPtr = SCROLL_GetScrollInfo( hwnd, SB_CTL )))
1246 {
1247 infoPtr->flags = wParam ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH;
1248 SCROLL_RefreshScrollBar(hwnd, SB_CTL, TRUE, TRUE);
1249 }
1250 }
1251 return 0;
1252
1253 case WM_LBUTTONDOWN:
1254 {
1255 POINT pt;
1256 pt.x = SLOWORD(lParam);
1257 pt.y = SHIWORD(lParam);
1258 SCROLL_TrackScrollBar( hwnd, SB_CTL, pt );
1259 }
1260 break;
1261 case WM_LBUTTONUP:
1262 case WM_MOUSEMOVE:
1263 case WM_SYSTIMER:
1264 {
1265 POINT pt;
1266 pt.x = SLOWORD(lParam);
1267 pt.y = SHIWORD(lParam);
1268 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1269 }
1270 break;
1271
1272 /* if key event is received, the scrollbar has the focus */
1273 case WM_KEYDOWN:
1274 /* hide caret on first KEYDOWN to prevent flicker */
1275 if ((lParam & 0x40000000)==0)
1276 HideCaret(hwnd);
1277 SCROLL_HandleKbdEvent( hwnd, wParam );
1278 break;
1279
1280 case WM_KEYUP:
1281 ShowCaret(hwnd);
1282 break;
1283
1284 case WM_SETFOCUS:
1285 {
1286 /* Create a caret when a ScrollBar get focus */
1287 RECT rect;
1288 int arrowSize, thumbSize, thumbPos, vertical;
1289 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1290 &arrowSize, &thumbSize, &thumbPos );
1291 if (!vertical)
1292 {
1293 CreateCaret(hwnd,1, thumbSize-2, rect.bottom-rect.top-2);
1294 SetCaretPos(thumbPos+1, rect.top+1);
1295 }
1296 else
1297 {
1298 CreateCaret(hwnd,1, rect.right-rect.left-2,thumbSize-2);
1299 SetCaretPos(rect.top+1, thumbPos+1);
1300 }
1301 ShowCaret(hwnd);
1302 }
1303 break;
1304
1305 case WM_KILLFOCUS:
1306 {
1307 RECT rect;
1308 int arrowSize, thumbSize, thumbPos, vertical;
1309 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1310 if (!vertical){
1311 rect.left=thumbPos+1;
1312 rect.right=rect.left+thumbSize;
1313 }
1314 else
1315 {
1316 rect.top=thumbPos+1;
1317 rect.bottom=rect.top+thumbSize;
1318 }
1319 HideCaret(hwnd);
1320 InvalidateRect(hwnd,&rect,0);
1321 DestroyCaret();
1322 }
1323 break;
1324
1325 case WM_ERASEBKGND:
1326 return 1;
1327
1328 case WM_GETDLGCODE:
1329 return DLGC_WANTARROWS; /* Windows returns this value */
1330
1331 case WM_PAINT:
1332 {
1333 PAINTSTRUCT ps;
1334 HDC hdc = BeginPaint( hwnd, &ps );
1335 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1336 EndPaint( hwnd, &ps );
1337 }
1338 break;
1339
1340 case SBM_SETPOS16:
1341 case SBM_SETPOS:
1342 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1343
1344 case SBM_GETPOS16:
1345 case SBM_GETPOS:
1346 return GetScrollPos( hwnd, SB_CTL );
1347
1348 case SBM_SETRANGE16:
1349 SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
1350 wParam /* FIXME: Is this correct? */ );
1351 return 0;
1352
1353 case SBM_SETRANGE:
1354 {
1355 INT oldPos = GetScrollPos( hwnd, SB_CTL );
1356 SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
1357 if (oldPos != GetScrollPos( hwnd, SB_CTL )) return oldPos;
1358 }
1359 return 0;
1360
1361 case SBM_GETRANGE16:
1362 FIXME("don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
1363 return 0;
1364
1365 case SBM_GETRANGE:
1366 GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
1367 return 0;
1368
1369 case SBM_ENABLE_ARROWS16:
1370 case SBM_ENABLE_ARROWS:
1371 return EnableScrollBar( hwnd, SB_CTL, wParam );
1372
1373 case SBM_SETRANGEREDRAW:
1374 {
1375 INT oldPos = GetScrollPos( hwnd, SB_CTL );
1376 SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
1377 if (oldPos != GetScrollPos( hwnd, SB_CTL )) return oldPos;
1378 }
1379 return 0;
1380
1381 case SBM_SETSCROLLINFO:
1382 return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1383
1384 case SBM_GETSCROLLINFO:
1385 return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
1386
1387 case 0x00e5:
1388 case 0x00e7:
1389 case 0x00e8:
1390 case 0x00eb:
1391 case 0x00ec:
1392 case 0x00ed:
1393 case 0x00ee:
1394 case 0x00ef:
1395 ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1396 message, wParam, lParam );
1397 break;
1398
1399 default:
1400 if (message >= WM_USER)
1401 WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1402 message, wParam, lParam );
1403 return DefWindowProcW( hwnd, message, wParam, lParam );
1404 }
1405 return 0;
1406 }
1407
1408
1409 /*************************************************************************
1410 * SetScrollInfo (USER32.@)
1411 * SetScrollInfo can be used to set the position, upper bound,
1412 * lower bound, and page size of a scrollbar control.
1413 *
1414 * RETURNS
1415 * Scrollbar position
1416 *
1417 * NOTE
1418 * For 100 lines of text to be displayed in a window of 25 lines,
1419 * one would for instance use info->nMin=0, info->nMax=75
1420 * (corresponding to the 76 different positions of the window on
1421 * the text), and info->nPage=25.
1422 */
1423 INT WINAPI SetScrollInfo(
1424 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1425 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1426 const SCROLLINFO *info /* [in] Specifies what to change and new values */,
1427 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1428 {
1429 INT action;
1430 INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1431
1432 if( action & SA_SSI_HIDE )
1433 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1434 else
1435 {
1436 if( action & SA_SSI_SHOW )
1437 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1438 return retVal; /* SetWindowPos() already did the painting */
1439
1440 if( bRedraw && (action & SA_SSI_REFRESH))
1441 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1442 else if( action & SA_SSI_REPAINT_ARROWS )
1443 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1444 }
1445 return retVal;
1446 }
1447
1448 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1449 const SCROLLINFO *info, INT *action )
1450 {
1451 /* Update the scrollbar state and set action flags according to
1452 * what has to be done graphics wise. */
1453
1454 SCROLLBAR_INFO *infoPtr;
1455 UINT new_flags;
1456 BOOL bChangeParams = FALSE; /* don't show/hide scrollbar if params don't change */
1457
1458 *action = 0;
1459
1460 if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
1461 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1462 if ((info->cbSize != sizeof(*info)) &&
1463 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1464
1465 if (TRACE_ON(scroll))
1466 {
1467 TRACE("hwnd=%04x bar=%d", hwnd, nBar);
1468 if (info->fMask & SIF_PAGE) DPRINTF( " page=%d", info->nPage );
1469 if (info->fMask & SIF_POS) DPRINTF( " pos=%d", info->nPos );
1470 if (info->fMask & SIF_RANGE) DPRINTF( " min=%d max=%d", info->nMin, info->nMax );
1471 DPRINTF("\n");
1472 }
1473
1474 /* Set the page size */
1475
1476 if (info->fMask & SIF_PAGE)
1477 {
1478 if( infoPtr->page != info->nPage )
1479 {
1480 infoPtr->page = info->nPage;
1481 *action |= SA_SSI_REFRESH;
1482 bChangeParams = TRUE;
1483 }
1484 }
1485
1486 /* Set the scroll pos */
1487
1488 if (info->fMask & SIF_POS)
1489 {
1490 if( infoPtr->curVal != info->nPos )
1491 {
1492 infoPtr->curVal = info->nPos;
1493 *action |= SA_SSI_REFRESH;
1494 }
1495 }
1496
1497 /* Set the scroll range */
1498
1499 if (info->fMask & SIF_RANGE)
1500 {
1501 /* Invalid range -> range is set to (0,0) */
1502 if ((info->nMin > info->nMax) ||
1503 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1504 {
1505 infoPtr->minVal = 0;
1506 infoPtr->maxVal = 0;
1507 bChangeParams = TRUE;
1508 }
1509 else
1510 {
1511 if( infoPtr->minVal != info->nMin ||
1512 infoPtr->maxVal != info->nMax )
1513 {
1514 *action |= SA_SSI_REFRESH;
1515 infoPtr->minVal = info->nMin;
1516 infoPtr->maxVal = info->nMax;
1517 bChangeParams = TRUE;
1518 }
1519 }
1520 }
1521
1522 /* Make sure the page size is valid */
1523
1524 if (infoPtr->page < 0) infoPtr->page = 0;
1525 else if (infoPtr->page > infoPtr->maxVal - infoPtr->minVal + 1 )
1526 infoPtr->page = infoPtr->maxVal - infoPtr->minVal + 1;
1527
1528 /* Make sure the pos is inside the range */
1529
1530 if (infoPtr->curVal < infoPtr->minVal)
1531 infoPtr->curVal = infoPtr->minVal;
1532 else if (infoPtr->curVal > infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1533 infoPtr->curVal = infoPtr->maxVal - max( infoPtr->page-1, 0 );
1534
1535 TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1536 infoPtr->page, infoPtr->curVal,
1537 infoPtr->minVal, infoPtr->maxVal );
1538
1539 /* don't change the scrollbar state if SetScrollInfo
1540 * is just called with SIF_DISABLENOSCROLL
1541 */
1542 if(!(info->fMask & SIF_ALL)) goto done;
1543
1544 /* Check if the scrollbar should be hidden or disabled */
1545
1546 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1547 {
1548 new_flags = infoPtr->flags;
1549 if (infoPtr->minVal >= infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1550 {
1551 /* Hide or disable scroll-bar */
1552 if (info->fMask & SIF_DISABLENOSCROLL)
1553 {
1554 new_flags = ESB_DISABLE_BOTH;
1555 *action |= SA_SSI_REFRESH;
1556 }
1557 else if ((nBar != SB_CTL) && bChangeParams)
1558 {
1559 *action = SA_SSI_HIDE;
1560 goto done;
1561 }
1562 }
1563 else /* Show and enable scroll-bar */
1564 {
1565 new_flags = 0;
1566 if ((nBar != SB_CTL) && bChangeParams)
1567 *action |= SA_SSI_SHOW;
1568 }
1569
1570 if (infoPtr->flags != new_flags) /* check arrow flags */
1571 {
1572 infoPtr->flags = new_flags;
1573 *action |= SA_SSI_REPAINT_ARROWS;
1574 }
1575 }
1576
1577 done:
1578 /* Return current position */
1579
1580 return infoPtr->curVal;
1581 }
1582
1583
1584 /*************************************************************************
1585 * GetScrollInfo (USER32.@)
1586 * GetScrollInfo can be used to retrieve the position, upper bound,
1587 * lower bound, and page size of a scrollbar control.
1588 *
1589 * RETURNS STD
1590 */
1591 BOOL WINAPI GetScrollInfo(
1592 HWND hwnd /* [in] Handle of window */ ,
1593 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1594 LPSCROLLINFO info /* [in/out] (info.fMask [in] specifies which values are to retrieve) */)
1595 {
1596 SCROLLBAR_INFO *infoPtr;
1597
1598 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1599 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1600 if ((info->cbSize != sizeof(*info)) &&
1601 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1602
1603 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->page;
1604 if (info->fMask & SIF_POS) info->nPos = infoPtr->curVal;
1605 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1606 info->nTrackPos = (SCROLL_TrackingWin == WIN_GetFullHandle(hwnd)) ? SCROLL_TrackingVal : infoPtr->curVal;
1607 if (info->fMask & SIF_RANGE)
1608 {
1609 info->nMin = infoPtr->minVal;
1610 info->nMax = infoPtr->maxVal;
1611 }
1612 return (info->fMask & SIF_ALL) != 0;
1613 }
1614
1615
1616 /*************************************************************************
1617 * SetScrollPos (USER32.@)
1618 *
1619 * RETURNS
1620 * Success: Scrollbar position
1621 * Failure: 0
1622 *
1623 * REMARKS
1624 * Note the ambiguity when 0 is returned. Use GetLastError
1625 * to make sure there was an error (and to know which one).
1626 */
1627 INT WINAPI SetScrollPos(
1628 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1629 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1630 INT nPos /* [in] New value */,
1631 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */ )
1632 {
1633 SCROLLINFO info;
1634 SCROLLBAR_INFO *infoPtr;
1635 INT oldPos;
1636
1637 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1638 oldPos = infoPtr->curVal;
1639 info.cbSize = sizeof(info);
1640 info.nPos = nPos;
1641 info.fMask = SIF_POS;
1642 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1643 return oldPos;
1644 }
1645
1646
1647 /*************************************************************************
1648 * GetScrollPos (USER32.@)
1649 *
1650 * RETURNS
1651 * Success: Current position
1652 * Failure: 0
1653 *
1654 * REMARKS
1655 * Note the ambiguity when 0 is returned. Use GetLastError
1656 * to make sure there was an error (and to know which one).
1657 */
1658 INT WINAPI GetScrollPos(
1659 HWND hwnd, /* [in] Handle of window */
1660 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1661 {
1662 SCROLLBAR_INFO *infoPtr;
1663
1664 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1665 return infoPtr->curVal;
1666 }
1667
1668
1669 /*************************************************************************
1670 * SetScrollRange (USER32.@)
1671 *
1672 * RETURNS STD
1673 */
1674 BOOL WINAPI SetScrollRange(
1675 HWND hwnd, /* [in] Handle of window whose scrollbar will be affected */
1676 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1677 INT minVal, /* [in] New minimum value */
1678 INT maxVal, /* [in] New maximum value */
1679 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1680 {
1681 SCROLLINFO info;
1682
1683 info.cbSize = sizeof(info);
1684 info.nMin = minVal;
1685 info.nMax = maxVal;
1686 info.fMask = SIF_RANGE;
1687 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1688 return TRUE;
1689 }
1690
1691
1692 /*************************************************************************
1693 * SCROLL_SetNCSbState
1694 *
1695 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1696 */
1697 INT SCROLL_SetNCSbState(HWND hwnd, int vMin, int vMax, int vPos,
1698 int hMin, int hMax, int hPos)
1699 {
1700 INT vA, hA;
1701 SCROLLINFO vInfo, hInfo;
1702
1703 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1704 vInfo.nMin = vMin;
1705 vInfo.nMax = vMax;
1706 vInfo.nPos = vPos;
1707 hInfo.nMin = hMin;
1708 hInfo.nMax = hMax;
1709 hInfo.nPos = hPos;
1710 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1711
1712 SCROLL_SetScrollInfo( hwnd, SB_VERT, &vInfo, &vA );
1713 SCROLL_SetScrollInfo( hwnd, SB_HORZ, &hInfo, &hA );
1714
1715 if( !SCROLL_ShowScrollBar( hwnd, SB_BOTH,
1716 (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1717 {
1718 /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1719 if( vA & SA_SSI_REFRESH )
1720 SCROLL_RefreshScrollBar( hwnd, SB_VERT, FALSE, TRUE );
1721
1722 if( hA & SA_SSI_REFRESH )
1723 SCROLL_RefreshScrollBar( hwnd, SB_HORZ, FALSE, TRUE );
1724 }
1725 return 0;
1726 }
1727
1728
1729 /*************************************************************************
1730 * GetScrollRange (USER32.@)
1731 *
1732 * RETURNS STD
1733 */
1734 BOOL WINAPI GetScrollRange(
1735 HWND hwnd, /* [in] Handle of window */
1736 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1737 LPINT lpMin, /* [out] Where to store minimum value */
1738 LPINT lpMax /* [out] Where to store maximum value */)
1739 {
1740 SCROLLBAR_INFO *infoPtr;
1741
1742 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1743 {
1744 if (lpMin) lpMin = 0;
1745 if (lpMax) lpMax = 0;
1746 return FALSE;
1747 }
1748 if (lpMin) *lpMin = infoPtr->minVal;
1749 if (lpMax) *lpMax = infoPtr->maxVal;
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=%04x bar=%d horz=%d, vert=%d\n",
1765 hwnd, nBar, fShowH, fShowV );
1766
1767 switch(nBar)
1768 {
1769 case SB_CTL:
1770 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1771 return TRUE;
1772
1773 case SB_BOTH:
1774 case SB_HORZ:
1775 if (fShowH)
1776 {
1777 fShowH = !(style & WS_HSCROLL);
1778 style |= WS_HSCROLL;
1779 }
1780 else /* hide it */
1781 {
1782 fShowH = (style & WS_HSCROLL);
1783 style &= ~WS_HSCROLL;
1784 }
1785 if( nBar == SB_HORZ ) {
1786 fShowV = FALSE;
1787 break;
1788 }
1789 /* fall through */
1790
1791 case SB_VERT:
1792 if (fShowV)
1793 {
1794 fShowV = !(style & WS_VSCROLL);
1795 style |= WS_VSCROLL;
1796 }
1797 else /* hide it */
1798 {
1799 fShowV = (style & WS_VSCROLL);
1800 style &= ~WS_VSCROLL;
1801 }
1802 if ( nBar == SB_VERT )
1803 fShowH = FALSE;
1804 break;
1805
1806 default:
1807 return FALSE; /* Nothing to do! */
1808 }
1809
1810 if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1811 {
1812 WIN_SetStyle( hwnd, style );
1813 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1814 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1815 return TRUE;
1816 }
1817 return FALSE; /* no frame changes */
1818 }
1819
1820
1821 /*************************************************************************
1822 * ShowScrollBar (USER32.@)
1823 *
1824 * RETURNS STD
1825 */
1826 BOOL WINAPI ShowScrollBar(
1827 HWND hwnd, /* [in] Handle of window whose scrollbar(s) will be affected */
1828 INT nBar, /* [in] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1829 BOOL fShow /* [in] TRUE = show, FALSE = hide */)
1830 {
1831 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1832 (nBar == SB_HORZ) ? 0 : fShow );
1833 return TRUE;
1834 }
1835
1836
1837 /*************************************************************************
1838 * EnableScrollBar (USER32.@)
1839 */
1840 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1841 {
1842 BOOL bFineWithMe;
1843 SCROLLBAR_INFO *infoPtr;
1844
1845 TRACE("%04x %d %d\n", hwnd, nBar, flags );
1846
1847 flags &= ESB_DISABLE_BOTH;
1848
1849 if (nBar == SB_BOTH)
1850 {
1851 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE;
1852 if (!(bFineWithMe = (infoPtr->flags == flags)) )
1853 {
1854 infoPtr->flags = flags;
1855 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1856 }
1857 nBar = SB_HORZ;
1858 }
1859 else
1860 bFineWithMe = TRUE;
1861
1862 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1863 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1864 infoPtr->flags = flags;
1865
1866 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1867 return TRUE;
1868 }
Windows API implementation