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Added a stub for msnet32.57
[wine.git] / controls / scroll.c
blob4c8aef3a4c0b6b187c1dfff266a79d9c0a94edcb
1 /*
2 * Scrollbar control
3 *
4 * Copyright 1993 Martin Ayotte
5 * Copyright 1994, 1996 Alexandre Julliard
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22 #include "windef.h"
23 #include "wingdi.h"
24 #include "wine/winuser16.h"
25 #include "controls.h"
26 #include "win.h"
27 #include "wine/debug.h"
28 #include "user.h"
29 #include "message.h"
30
31 WINE_DEFAULT_DEBUG_CHANNEL(scroll);
32
33 typedef struct
34 {
35 INT curVal; /* Current scroll-bar value */
36 INT minVal; /* Minimum scroll-bar value */
37 INT maxVal; /* Maximum scroll-bar value */
38 INT page; /* Page size of scroll bar (Win32) */
39 UINT flags; /* EnableScrollBar flags */
40 } SCROLLBAR_INFO, *LPSCROLLBAR_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 * SCROLL_ScrollInfoValid
142 *
143 * Determine if the supplied SCROLLINFO struct is valid.
144 */
145 inline static BOOL SCROLL_ScrollInfoValid(
146 LPSCROLLINFO info /* [in] The SCROLLINFO struct to be tested */)
147 {
148 return !(info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)
149 || (info->cbSize != sizeof(*info)
150 && info->cbSize != sizeof(*info) - sizeof(info->nTrackPos)));
151 }
152
153
154 /***********************************************************************
155 * SCROLL_LoadBitmaps
156 */
157 static void SCROLL_LoadBitmaps(void)
158 {
159 hUpArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
160 hDnArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
161 hLfArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
162 hRgArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
163 hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
164 hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
165 hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
166 hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
167 hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
168 hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
169 hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
170 hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
171 }
172
173
174 /***********************************************************************
175 * SCROLL_GetScrollBarInfo
176 */
177 static SCROLLBAR_INFO *SCROLL_GetScrollBarInfo( HWND hwnd, INT nBar )
178 {
179 SCROLLBAR_INFO *infoPtr;
180 WND *wndPtr = WIN_FindWndPtr( hwnd );
181
182 if (!wndPtr) return NULL;
183 switch(nBar)
184 {
185 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
186 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
187 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
188 default:
189 WIN_ReleaseWndPtr( wndPtr );
190 return NULL;
191 }
192
193 if (!infoPtr) /* Create the info structure if needed */
194 {
195 if ((infoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(SCROLLBAR_INFO) )))
196 {
197 infoPtr->minVal = infoPtr->curVal = infoPtr->page = 0;
198 infoPtr->maxVal = 100;
199 infoPtr->flags = ESB_ENABLE_BOTH;
200 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
201 else wndPtr->pVScroll = infoPtr;
202 }
203 if (!hUpArrow) SCROLL_LoadBitmaps();
204 }
205 WIN_ReleaseWndPtr( wndPtr );
206 return infoPtr;
207 }
208
209
210 /***********************************************************************
211 * SCROLL_GetScrollBarRect
212 *
213 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
214 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
215 * 'arrowSize' returns the width or height of an arrow (depending on
216 * the orientation of the scrollbar), 'thumbSize' returns the size of
217 * the thumb, and 'thumbPos' returns the position of the thumb
218 * relative to the left or to the top.
219 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
220 */
221 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
222 INT *arrowSize, INT *thumbSize,
223 INT *thumbPos )
224 {
225 INT pixels;
226 BOOL vertical;
227 WND *wndPtr = WIN_FindWndPtr( hwnd );
228
229 switch(nBar)
230 {
231 case SB_HORZ:
232 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
233 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
234 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
235 lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
236 if(wndPtr->dwStyle & WS_BORDER) {
237 lprect->left--;
238 lprect->right++;
239 } else if(wndPtr->dwStyle & WS_VSCROLL)
240 lprect->right++;
241 vertical = FALSE;
242 break;
243
244 case SB_VERT:
245 if((wndPtr->dwExStyle & WS_EX_LEFTSCROLLBAR) != 0)
246 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left - GetSystemMetrics(SM_CXVSCROLL);
247 else
248 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
249 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
250 lprect->right = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
251 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
252 if(wndPtr->dwStyle & WS_BORDER) {
253 lprect->top--;
254 lprect->bottom++;
255 } else if(wndPtr->dwStyle & WS_HSCROLL)
256 lprect->bottom++;
257 vertical = TRUE;
258 break;
259
260 case SB_CTL:
261 GetClientRect( hwnd, lprect );
262 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
263 break;
264
265 default:
266 WIN_ReleaseWndPtr(wndPtr);
267 return FALSE;
268 }
269
270 if (vertical) pixels = lprect->bottom - lprect->top;
271 else pixels = lprect->right - lprect->left;
272
273 if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
274 {
275 if (pixels > SCROLL_MIN_RECT)
276 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
277 else
278 *arrowSize = 0;
279 *thumbPos = *thumbSize = 0;
280 }
281 else
282 {
283 SCROLLBAR_INFO *info = SCROLL_GetScrollBarInfo( hwnd, nBar );
284
285 *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
286 pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
287
288 if (info->page)
289 {
290 *thumbSize = MulDiv(pixels,info->page,(info->maxVal-info->minVal+1));
291 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
292 }
293 else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
294
295 if (((pixels -= *thumbSize ) < 0) ||
296 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
297 {
298 /* Rectangle too small or scrollbar disabled -> no thumb */
299 *thumbPos = *thumbSize = 0;
300 }
301 else
302 {
303 INT max = info->maxVal - max( info->page-1, 0 );
304 if (info->minVal >= max)
305 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
306 else
307 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
308 + MulDiv(pixels, (info->curVal-info->minVal),(max - info->minVal));
309 }
310 }
311 WIN_ReleaseWndPtr(wndPtr);
312 return vertical;
313 }
314
315
316 /***********************************************************************
317 * SCROLL_GetThumbVal
318 *
319 * Compute the current scroll position based on the thumb position in pixels
320 * from the top of the scroll-bar.
321 */
322 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
323 BOOL vertical, INT pos )
324 {
325 INT thumbSize;
326 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
327
328 if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
329 return infoPtr->minVal;
330
331 if (infoPtr->page)
332 {
333 thumbSize = MulDiv(pixels,infoPtr->page,(infoPtr->maxVal-infoPtr->minVal+1));
334 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
335 }
336 else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
337
338 if ((pixels -= thumbSize) <= 0) return infoPtr->minVal;
339
340 pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
341 if (pos > pixels) pos = pixels;
342
343 if (!infoPtr->page) pos *= infoPtr->maxVal - infoPtr->minVal;
344 else pos *= infoPtr->maxVal - infoPtr->minVal - infoPtr->page + 1;
345 return infoPtr->minVal + ((pos + pixels / 2) / pixels);
346 }
347
348 /***********************************************************************
349 * SCROLL_PtInRectEx
350 */
351 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
352 {
353 RECT rect = *lpRect;
354
355 if (vertical)
356 {
357 rect.left -= lpRect->right - lpRect->left;
358 rect.right += lpRect->right - lpRect->left;
359 }
360 else
361 {
362 rect.top -= lpRect->bottom - lpRect->top;
363 rect.bottom += lpRect->bottom - lpRect->top;
364 }
365 return PtInRect( &rect, pt );
366 }
367
368 /***********************************************************************
369 * SCROLL_ClipPos
370 */
371 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
372 {
373 if( pt.x < lpRect->left )
374 pt.x = lpRect->left;
375 else
376 if( pt.x > lpRect->right )
377 pt.x = lpRect->right;
378
379 if( pt.y < lpRect->top )
380 pt.y = lpRect->top;
381 else
382 if( pt.y > lpRect->bottom )
383 pt.y = lpRect->bottom;
384
385 return pt;
386 }
387
388
389 /***********************************************************************
390 * SCROLL_HitTest
391 *
392 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
393 */
394 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
395 POINT pt, BOOL bDragging )
396 {
397 INT arrowSize, thumbSize, thumbPos;
398 RECT rect;
399
400 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
401 &arrowSize, &thumbSize, &thumbPos );
402
403 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
404 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
405
406 if (vertical)
407 {
408 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
409 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
410 if (!thumbPos) return SCROLL_TOP_RECT;
411 pt.y -= rect.top;
412 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
413 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
414 }
415 else /* horizontal */
416 {
417 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
418 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
419 if (!thumbPos) return SCROLL_TOP_RECT;
420 pt.x -= rect.left;
421 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
422 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
423 }
424 return SCROLL_THUMB;
425 }
426
427
428 /***********************************************************************
429 * SCROLL_DrawArrows
430 *
431 * Draw the scroll bar arrows.
432 */
433 static void SCROLL_DrawArrows_9x( HDC hdc, SCROLLBAR_INFO *infoPtr,
434 RECT *rect, INT arrowSize, BOOL vertical,
435 BOOL top_pressed, BOOL bottom_pressed )
436 {
437 RECT r;
438
439 r = *rect;
440 if( vertical )
441 r.bottom = r.top + arrowSize;
442 else
443 r.right = r.left + arrowSize;
444
445 DrawFrameControl( hdc, &r, DFC_SCROLL,
446 (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
447 | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
448 | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
449
450 r = *rect;
451 if( vertical )
452 r.top = r.bottom-arrowSize;
453 else
454 r.left = r.right-arrowSize;
455
456 DrawFrameControl( hdc, &r, DFC_SCROLL,
457 (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
458 | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
459 | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
460 }
461
462 static void SCROLL_DrawArrows_31( HDC hdc, SCROLLBAR_INFO *infoPtr,
463 RECT *rect, INT arrowSize, BOOL vertical,
464 BOOL top_pressed, BOOL bottom_pressed )
465 {
466 HDC hdcMem = CreateCompatibleDC( hdc );
467 HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
468 TOP_ARROW(infoPtr->flags, top_pressed)
469 : LEFT_ARROW(infoPtr->flags, top_pressed));
470
471 SetStretchBltMode( hdc, STRETCH_DELETESCANS );
472 StretchBlt( hdc, rect->left, rect->top,
473 vertical ? rect->right-rect->left : arrowSize,
474 vertical ? arrowSize : rect->bottom-rect->top,
475 hdcMem, 0, 0,
476 GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
477 SRCCOPY );
478
479 SelectObject( hdcMem, vertical ?
480 BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
481 : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
482 if (vertical)
483 StretchBlt( hdc, rect->left, rect->bottom - arrowSize,
484 rect->right - rect->left, arrowSize,
485 hdcMem, 0, 0,
486 GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
487 SRCCOPY );
488 else
489 StretchBlt( hdc, rect->right - arrowSize, rect->top,
490 arrowSize, rect->bottom - rect->top,
491 hdcMem, 0, 0,
492 GetSystemMetrics(SM_CXVSCROLL), GetSystemMetrics(SM_CYHSCROLL),
493 SRCCOPY );
494 SelectObject( hdcMem, hbmpPrev );
495 DeleteDC( hdcMem );
496 }
497
498 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
499 RECT *rect, INT arrowSize, BOOL vertical,
500 BOOL top_pressed, BOOL bottom_pressed )
501 {
502 if( TWEAK_WineLook == WIN31_LOOK )
503 SCROLL_DrawArrows_31( hdc, infoPtr, rect, arrowSize,
504 vertical, top_pressed,bottom_pressed );
505 else
506 SCROLL_DrawArrows_9x( hdc, infoPtr, rect, arrowSize,
507 vertical, top_pressed,bottom_pressed );
508 }
509
510
511 /***********************************************************************
512 * SCROLL_DrawMovingThumb
513 *
514 * Draw the moving thumb rectangle.
515 */
516 static void SCROLL_DrawMovingThumb_31( HDC hdc, RECT *rect, BOOL vertical,
517 INT arrowSize, INT thumbSize )
518 {
519 RECT r = *rect;
520 if (vertical)
521 {
522 r.top += SCROLL_TrackingPos;
523 if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
524 r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
525 if (r.top + thumbSize >
526 rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
527 r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
528 - thumbSize;
529 r.bottom = r.top + thumbSize;
530 }
531 else
532 {
533 r.left += SCROLL_TrackingPos;
534 if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
535 r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
536 if (r.left + thumbSize >
537 rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
538 r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
539 - thumbSize;
540 r.right = r.left + thumbSize;
541 }
542
543 DrawFocusRect( hdc, &r );
544 SCROLL_MovingThumb = !SCROLL_MovingThumb;
545 }
546
547 static void SCROLL_DrawMovingThumb_9x( HDC hdc, RECT *rect, BOOL vertical,
548 INT arrowSize, INT thumbSize )
549 {
550 INT pos = SCROLL_TrackingPos;
551 INT max_size;
552
553 if( vertical )
554 max_size = rect->bottom - rect->top;
555 else
556 max_size = rect->right - rect->left;
557
558 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
559
560 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
561 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
562 else if( pos > max_size )
563 pos = max_size;
564
565 SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
566 rect, arrowSize, thumbSize, pos,
567 0, vertical, FALSE, FALSE );
568
569 SCROLL_MovingThumb = !SCROLL_MovingThumb;
570 }
571
572 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
573 INT arrowSize, INT thumbSize )
574 {
575 if( TWEAK_WineLook == WIN31_LOOK )
576 SCROLL_DrawMovingThumb_31( hdc, rect, vertical, arrowSize, thumbSize );
577 else
578 SCROLL_DrawMovingThumb_9x( hdc, rect, vertical, arrowSize, thumbSize );
579 }
580
581 /***********************************************************************
582 * SCROLL_DrawInterior
583 *
584 * Draw the scroll bar interior (everything except the arrows).
585 */
586 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
587 RECT *rect, INT arrowSize,
588 INT thumbSize, INT thumbPos,
589 UINT flags, BOOL vertical,
590 BOOL top_selected, BOOL bottom_selected )
591 {
592 RECT r;
593 HPEN hSavePen;
594 HBRUSH hSaveBrush,hBrush;
595
596 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
597 * The window-owned scrollbars need to call DEFWND_ControlColor
598 * to correctly setup default scrollbar colors
599 */
600 if (nBar == SB_CTL)
601 {
602 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
603 (WPARAM)hdc,(LPARAM)hwnd);
604 }
605 else
606 {
607 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
608 }
609
610 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
611 hSaveBrush = SelectObject( hdc, hBrush );
612
613 /* Calculate the scroll rectangle */
614 r = *rect;
615 if (vertical)
616 {
617 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
618 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
619 }
620 else
621 {
622 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
623 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
624 }
625
626 /* Draw the scroll rectangles and thumb */
627 if (!thumbPos) /* No thumb to draw */
628 {
629 PatBlt( hdc, r.left, r.top,
630 r.right - r.left, r.bottom - r.top,
631 PATCOPY );
632
633 /* cleanup and return */
634 SelectObject( hdc, hSavePen );
635 SelectObject( hdc, hSaveBrush );
636 return;
637 }
638
639 if (vertical)
640 {
641 PatBlt( hdc, r.left, r.top,
642 r.right - r.left,
643 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
644 top_selected ? 0x0f0000 : PATCOPY );
645 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
646 PatBlt( hdc, r.left, r.top + thumbSize,
647 r.right - r.left,
648 r.bottom - r.top - thumbSize,
649 bottom_selected ? 0x0f0000 : PATCOPY );
650 r.bottom = r.top + thumbSize;
651 }
652 else /* horizontal */
653 {
654 PatBlt( hdc, r.left, r.top,
655 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
656 r.bottom - r.top,
657 top_selected ? 0x0f0000 : PATCOPY );
658 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
659 PatBlt( hdc, r.left + thumbSize, r.top,
660 r.right - r.left - thumbSize,
661 r.bottom - r.top,
662 bottom_selected ? 0x0f0000 : PATCOPY );
663 r.right = r.left + thumbSize;
664 }
665
666 /* Draw the thumb */
667 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
668
669 /* cleanup */
670 SelectObject( hdc, hSavePen );
671 SelectObject( hdc, hSaveBrush );
672 }
673
674
675 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
676 RECT *rect, INT arrowSize,
677 INT thumbSize, INT thumbPos,
678 UINT flags, BOOL vertical,
679 BOOL top_selected, BOOL bottom_selected )
680 {
681 RECT r;
682 HPEN hSavePen;
683 HBRUSH hSaveBrush,hBrush;
684 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
685
686 if (Save_SCROLL_MovingThumb &&
687 (SCROLL_TrackingWin == hwnd) &&
688 (SCROLL_TrackingBar == nBar))
689 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
690
691 /* Select the correct brush and pen */
692
693 if (TWEAK_WineLook == WIN31_LOOK && (flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
694 {
695 /* This ought to be the color of the parent window */
696 hBrush = GetSysColorBrush(COLOR_WINDOW);
697 }
698 else
699 {
700 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
701 * The window-owned scrollbars need to call DEFWND_ControlColor
702 * to correctly setup default scrollbar colors
703 */
704 if (nBar == SB_CTL) {
705 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
706 (WPARAM)hdc,(LPARAM)hwnd);
707 } else {
708 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
709 }
710 }
711 hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
712 hSaveBrush = SelectObject( hdc, hBrush );
713
714 /* Calculate the scroll rectangle */
715
716 r = *rect;
717 if (vertical)
718 {
719 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
720 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
721 }
722 else
723 {
724 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
725 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
726 }
727
728 /* Draw the scroll bar frame */
729
730 /* Only draw outline if Win 3.1. Mar 24, 1999 - Ronald B. Cemer */
731 if (TWEAK_WineLook == WIN31_LOOK)
732 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
733
734 /* Draw the scroll rectangles and thumb */
735
736 if (!thumbPos) /* No thumb to draw */
737 {
738 INT offset = (TWEAK_WineLook > WIN31_LOOK) ? 0 : 1;
739
740 PatBlt( hdc, r.left+offset, r.top+offset,
741 r.right - r.left - 2*offset, r.bottom - r.top - 2*offset,
742 PATCOPY );
743
744 /* cleanup and return */
745 SelectObject( hdc, hSavePen );
746 SelectObject( hdc, hSaveBrush );
747 return;
748 }
749
750 if (vertical)
751 {
752 INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
753
754 PatBlt( hdc, r.left + offset, r.top + offset,
755 r.right - r.left - offset*2,
756 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - offset,
757 top_selected ? 0x0f0000 : PATCOPY );
758 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
759 PatBlt( hdc, r.left + offset, r.top + thumbSize,
760 r.right - r.left - offset*2,
761 r.bottom - r.top - thumbSize - offset,
762 bottom_selected ? 0x0f0000 : PATCOPY );
763 r.bottom = r.top + thumbSize;
764 }
765 else /* horizontal */
766 {
767 INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
768
769 PatBlt( hdc, r.left + offset, r.top + offset,
770 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
771 r.bottom - r.top - offset*2,
772 top_selected ? 0x0f0000 : PATCOPY );
773 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
774 PatBlt( hdc, r.left + thumbSize, r.top + offset,
775 r.right - r.left - thumbSize - offset,
776 r.bottom - r.top - offset*2,
777 bottom_selected ? 0x0f0000 : PATCOPY );
778 r.right = r.left + thumbSize;
779 }
780
781 /* Draw the thumb */
782
783 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
784 if (TWEAK_WineLook == WIN31_LOOK)
785 {
786 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
787 r.top++, r.left++;
788 }
789 else
790 {
791 Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
792 }
793 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
794
795 if (Save_SCROLL_MovingThumb &&
796 (SCROLL_TrackingWin == hwnd) &&
797 (SCROLL_TrackingBar == nBar))
798 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
799
800 /* cleanup */
801 SelectObject( hdc, hSavePen );
802 SelectObject( hdc, hSaveBrush );
803 }
804
805
806 /***********************************************************************
807 * SCROLL_DrawScrollBar
808 *
809 * Redraw the whole scrollbar.
810 */
811 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
812 BOOL arrows, BOOL interior )
813 {
814 INT arrowSize, thumbSize, thumbPos;
815 RECT rect;
816 BOOL vertical;
817 WND *wndPtr = WIN_FindWndPtr( hwnd );
818 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar );
819 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
820
821 if (!wndPtr || !infoPtr ||
822 ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
823 ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
824 if (!WIN_IsWindowDrawable( hwnd, FALSE )) goto END;
825 hwnd = wndPtr->hwndSelf; /* make it a full handle */
826
827 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
828 &arrowSize, &thumbSize, &thumbPos );
829
830 /* do not draw if the scrollbar rectangle is empty */
831 if(IsRectEmpty(&rect))
832 goto END;
833
834 if (Save_SCROLL_MovingThumb &&
835 (SCROLL_TrackingWin == hwnd) &&
836 (SCROLL_TrackingBar == nBar))
837 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
838
839 /* Draw the arrows */
840
841 if (arrows && arrowSize)
842 {
843 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
844 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
845 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
846 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
847 else
848 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
849 FALSE, FALSE );
850 }
851 if( interior )
852 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
853 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
854
855 if (Save_SCROLL_MovingThumb &&
856 (SCROLL_TrackingWin == hwnd) &&
857 (SCROLL_TrackingBar == nBar))
858 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
859
860 /* if scroll bar has focus, reposition the caret */
861 if(hwnd==GetFocus() && (nBar==SB_CTL))
862 {
863 if (!vertical)
864 {
865 SetCaretPos(thumbPos+1, rect.top+1);
866 }
867 else
868 {
869 SetCaretPos(rect.top+1, thumbPos+1);
870 }
871 }
872
873 END:
874 WIN_ReleaseWndPtr(wndPtr);
875 }
876
877
878 /***********************************************************************
879 * SCROLL_RefreshScrollBar
880 *
881 * Repaint the scroll bar interior after a SetScrollRange() or
882 * SetScrollPos() call.
883 */
884 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
885 BOOL arrows, BOOL interior )
886 {
887 HDC hdc = GetDCEx( hwnd, 0,
888 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
889 if (!hdc) return;
890
891 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
892 ReleaseDC( hwnd, hdc );
893 }
894
895
896 /***********************************************************************
897 * SCROLL_HandleKbdEvent
898 *
899 * Handle a keyboard event (only for SB_CTL scrollbars with focus).
900 */
901 static void SCROLL_HandleKbdEvent(
902 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
903 WPARAM wParam /* [in] Variable input including enable state */,
904 LPARAM lParam /* [in] Variable input including input point */)
905 {
906 TRACE("hwnd=%p wParam=%d lParam=%ld\n", hwnd, wParam, lParam);
907
908 /* hide caret on first KEYDOWN to prevent flicker */
909 if ((lParam & PFD_DOUBLEBUFFER_DONTCARE) == 0)
910 HideCaret(hwnd);
911
912 switch(wParam)
913 {
914 case VK_PRIOR: wParam = SB_PAGEUP; break;
915 case VK_NEXT: wParam = SB_PAGEDOWN; break;
916 case VK_HOME: wParam = SB_TOP; break;
917 case VK_END: wParam = SB_BOTTOM; break;
918 case VK_UP: wParam = SB_LINEUP; break;
919 case VK_DOWN: wParam = SB_LINEDOWN; break;
920 default: return;
921 }
922 SendMessageW(GetParent(hwnd),
923 ((GetWindowLongA( hwnd, GWL_STYLE ) & SBS_VERT) ?
924 WM_VSCROLL : WM_HSCROLL), wParam, (LPARAM)hwnd);
925 }
926
927
928 /***********************************************************************
929 * SCROLL_HandleScrollEvent
930 *
931 * Handle a mouse or timer event for the scrollbar.
932 * 'pt' is the location of the mouse event in client (for SB_CTL) or
933 * windows coordinates.
934 */
935 static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
936 {
937 /* Previous mouse position for timer events */
938 static POINT prevPt;
939 /* Thumb position when tracking started. */
940 static UINT trackThumbPos;
941 /* Position in the scroll-bar of the last button-down event. */
942 static INT lastClickPos;
943 /* Position in the scroll-bar of the last mouse event. */
944 static INT lastMousePos;
945
946 enum SCROLL_HITTEST hittest;
947 HWND hwndOwner, hwndCtl;
948 BOOL vertical;
949 INT arrowSize, thumbSize, thumbPos;
950 RECT rect;
951 HDC hdc;
952
953 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar );
954 if (!infoPtr) return;
955 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
956 return;
957
958 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
959 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
960 &arrowSize, &thumbSize, &thumbPos );
961 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
962 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
963
964 switch(msg)
965 {
966 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
967 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
968 SCROLL_trackVertical = vertical;
969 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
970 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
971 lastMousePos = lastClickPos;
972 trackThumbPos = thumbPos;
973 prevPt = pt;
974 if (nBar == SB_CTL && (GetWindowLongA(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
975 SetCapture( hwnd );
976 break;
977
978 case WM_MOUSEMOVE:
979 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
980 prevPt = pt;
981 break;
982
983 case WM_LBUTTONUP:
984 hittest = SCROLL_NOWHERE;
985 ReleaseCapture();
986 /* if scrollbar has focus, show back caret */
987 if (hwnd==GetFocus()) ShowCaret(hwnd);
988 break;
989
990 case WM_SYSTIMER:
991 pt = prevPt;
992 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
993 break;
994
995 default:
996 return; /* Should never happen */
997 }
998
999 TRACE("Event: hwnd=%p bar=%d msg=%s pt=%ld,%ld hit=%d\n",
1000 hwnd, nBar, SPY_GetMsgName(msg,hwnd), pt.x, pt.y, hittest );
1001
1002 switch(SCROLL_trackHitTest)
1003 {
1004 case SCROLL_NOWHERE: /* No tracking in progress */
1005 break;
1006
1007 case SCROLL_TOP_ARROW:
1008 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1009 (hittest == SCROLL_trackHitTest), FALSE );
1010 if (hittest == SCROLL_trackHitTest)
1011 {
1012 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1013 {
1014 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1015 SB_LINEUP, (LPARAM)hwndCtl );
1016 }
1017
1018 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1019 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1020 (TIMERPROC)0 );
1021 }
1022 else KillSystemTimer( hwnd, SCROLL_TIMER );
1023 break;
1024
1025 case SCROLL_TOP_RECT:
1026 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1027 thumbPos, infoPtr->flags, vertical,
1028 (hittest == SCROLL_trackHitTest), FALSE );
1029 if (hittest == SCROLL_trackHitTest)
1030 {
1031 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1032 {
1033 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1034 SB_PAGEUP, (LPARAM)hwndCtl );
1035 }
1036 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1037 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1038 (TIMERPROC)0 );
1039 }
1040 else KillSystemTimer( hwnd, SCROLL_TIMER );
1041 break;
1042
1043 case SCROLL_THUMB:
1044 if (msg == WM_LBUTTONDOWN)
1045 {
1046 SCROLL_TrackingWin = hwnd;
1047 SCROLL_TrackingBar = nBar;
1048 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
1049 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1050 vertical,
1051 SCROLL_TrackingPos );
1052 if (!SCROLL_MovingThumb)
1053 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1054 }
1055 else if (msg == WM_LBUTTONUP)
1056 {
1057 if (SCROLL_MovingThumb)
1058 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1059 SCROLL_TrackingWin = 0;
1060 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1061 thumbPos, infoPtr->flags, vertical,
1062 FALSE, FALSE );
1063 }
1064 else /* WM_MOUSEMOVE */
1065 {
1066 UINT pos;
1067
1068 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
1069 else
1070 {
1071 pt = SCROLL_ClipPos( &rect, pt );
1072 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
1073 }
1074 if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
1075 {
1076 if (SCROLL_MovingThumb)
1077 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1078 arrowSize, thumbSize );
1079 lastMousePos = pos;
1080 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
1081 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1082 vertical,
1083 SCROLL_TrackingPos );
1084 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1085 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1086 (LPARAM)hwndCtl );
1087 if (!SCROLL_MovingThumb)
1088 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1089 arrowSize, thumbSize );
1090 }
1091 }
1092 break;
1093
1094 case SCROLL_BOTTOM_RECT:
1095 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1096 thumbPos, infoPtr->flags, vertical,
1097 FALSE, (hittest == SCROLL_trackHitTest) );
1098 if (hittest == SCROLL_trackHitTest)
1099 {
1100 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1101 {
1102 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1103 SB_PAGEDOWN, (LPARAM)hwndCtl );
1104 }
1105 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1106 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1107 (TIMERPROC)0 );
1108 }
1109 else KillSystemTimer( hwnd, SCROLL_TIMER );
1110 break;
1111
1112 case SCROLL_BOTTOM_ARROW:
1113 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1114 FALSE, (hittest == SCROLL_trackHitTest) );
1115 if (hittest == SCROLL_trackHitTest)
1116 {
1117 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1118 {
1119 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1120 SB_LINEDOWN, (LPARAM)hwndCtl );
1121 }
1122
1123 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1124 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1125 (TIMERPROC)0 );
1126 }
1127 else KillSystemTimer( hwnd, SCROLL_TIMER );
1128 break;
1129 }
1130
1131 if (msg == WM_LBUTTONDOWN)
1132 {
1133
1134 if (hittest == SCROLL_THUMB)
1135 {
1136 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1137 trackThumbPos + lastMousePos - lastClickPos );
1138 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1139 MAKEWPARAM( SB_THUMBTRACK, val ), (LPARAM)hwndCtl );
1140 }
1141 }
1142
1143 if (msg == WM_LBUTTONUP)
1144 {
1145 hittest = SCROLL_trackHitTest;
1146 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1147
1148 if (hittest == SCROLL_THUMB)
1149 {
1150 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1151 trackThumbPos + lastMousePos - lastClickPos );
1152 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1153 MAKEWPARAM( SB_THUMBPOSITION, val ), (LPARAM)hwndCtl );
1154 }
1155 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1156 SB_ENDSCROLL, (LPARAM)hwndCtl );
1157 }
1158
1159 ReleaseDC( hwnd, hdc );
1160 }
1161
1162
1163 /***********************************************************************
1164 * SCROLL_TrackScrollBar
1165 *
1166 * Track a mouse button press on a scroll-bar.
1167 * pt is in screen-coordinates for non-client scroll bars.
1168 */
1169 void SCROLL_TrackScrollBar( HWND hwnd, INT scrollbar, POINT pt )
1170 {
1171 MSG msg;
1172 INT xoffset = 0, yoffset = 0;
1173
1174 if (scrollbar != SB_CTL)
1175 {
1176 WND *wndPtr = WIN_GetPtr( hwnd );
1177 if (!wndPtr || wndPtr == WND_OTHER_PROCESS) return;
1178 xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
1179 yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
1180 WIN_ReleasePtr( wndPtr );
1181 ScreenToClient( hwnd, &pt );
1182 pt.x += xoffset;
1183 pt.y += yoffset;
1184 }
1185
1186 SCROLL_HandleScrollEvent( hwnd, scrollbar, WM_LBUTTONDOWN, pt );
1187
1188 do
1189 {
1190 if (!GetMessageW( &msg, 0, 0, 0 )) break;
1191 if (CallMsgFilterW( &msg, MSGF_SCROLLBAR )) continue;
1192 switch(msg.message)
1193 {
1194 case WM_LBUTTONUP:
1195 case WM_MOUSEMOVE:
1196 case WM_SYSTIMER:
1197 pt.x = LOWORD(msg.lParam) + xoffset;
1198 pt.y = HIWORD(msg.lParam) + yoffset;
1199 SCROLL_HandleScrollEvent( hwnd, scrollbar, msg.message, pt );
1200 break;
1201 default:
1202 TranslateMessage( &msg );
1203 DispatchMessageW( &msg );
1204 break;
1205 }
1206 if (!IsWindow( hwnd ))
1207 {
1208 ReleaseCapture();
1209 break;
1210 }
1211 } while (msg.message != WM_LBUTTONUP);
1212 }
1213
1214
1215 /***********************************************************************
1216 * SCROLL_CreateScrollBar
1217 *
1218 * Create a scroll bar
1219 */
1220 static void SCROLL_CreateScrollBar(
1221 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1222 LPCREATESTRUCTW lpCreate /* [in] The style and place of the scroll bar */)
1223 {
1224 POINT pos, size;
1225 LPSCROLLBAR_INFO info = SCROLL_GetScrollBarInfo(hwnd, SB_CTL);
1226 if (!info) return;
1227
1228 TRACE("hwnd=%p lpCreate=%p\n", hwnd, lpCreate);
1229
1230 if (lpCreate->style & WS_DISABLED)
1231 {
1232 info->flags = ESB_DISABLE_BOTH;
1233 TRACE("Created WS_DISABLED scrollbar\n");
1234 }
1235
1236 /* copy the desired positions and size */
1237 pos.x = lpCreate->x; pos.y = lpCreate->y;
1238 size.x = lpCreate->cx; size.y = lpCreate->cy;
1239
1240 /* move position based on style */
1241 if (lpCreate->style & SBS_RIGHTALIGN)
1242 pos.x += size.x - GetSystemMetrics(SM_CXVSCROLL) - 1;
1243 else if (lpCreate->style & SBS_BOTTOMALIGN)
1244 pos.y += size.y - GetSystemMetrics(SM_CYHSCROLL) - 1;
1245
1246 /* change size based on style */
1247 if (lpCreate->style & SBS_VERT)
1248 size.x = GetSystemMetrics(SM_CXVSCROLL) + 1;
1249 else
1250 size.y = GetSystemMetrics(SM_CYHSCROLL) + 1;
1251
1252 MoveWindow(hwnd, pos.x, pos.y, size.x, size.y, FALSE);
1253 }
1254
1255
1256 /*************************************************************************
1257 * SCROLL_GetScrollInfo
1258 *
1259 * Internal helper for the API function
1260 */
1261 static BOOL SCROLL_GetScrollInfo(
1262 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1263 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1264 LPSCROLLINFO info /* [in/out] (fMask specifies which values to retrieve) */)
1265 {
1266 LPSCROLLBAR_INFO infoPtr;
1267
1268 /* handle invalid data structure */
1269 if (!SCROLL_ScrollInfoValid(info)
1270 || !(infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar)))
1271 return FALSE;
1272
1273 /* fill in the desired scroll info structure */
1274 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->page;
1275 if (info->fMask & SIF_POS) info->nPos = infoPtr->curVal;
1276 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1277 info->nTrackPos = (SCROLL_TrackingWin == WIN_GetFullHandle(hwnd)) ? SCROLL_TrackingVal : infoPtr->curVal;
1278 if (info->fMask & SIF_RANGE)
1279 {
1280 info->nMin = infoPtr->minVal;
1281 info->nMax = infoPtr->maxVal;
1282 }
1283
1284 return (info->fMask & SIF_ALL) != 0;
1285 }
1286
1287
1288 /*************************************************************************
1289 * SCROLL_GetScrollPos
1290 *
1291 * Internal helper for the API function
1292 */
1293 static INT SCROLL_GetScrollPos(
1294 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1295 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1296 {
1297 LPSCROLLBAR_INFO infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar);
1298 return infoPtr ? infoPtr->curVal: 0;
1299 }
1300
1301
1302 /*************************************************************************
1303 * SCROLL_GetScrollRange
1304 *
1305 * Internal helper for the API function
1306 *
1307 * RETURNS STD
1308 */
1309 static BOOL SCROLL_GetScrollRange(
1310 HWND hwnd, /* [in] Handle of window */
1311 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1312 LPINT lpMin, /* [out] Where to store minimum value */
1313 LPINT lpMax /* [out] Where to store maximum value */)
1314 {
1315 LPSCROLLBAR_INFO infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar);
1316
1317 if (lpMin) *lpMin = infoPtr ? infoPtr->minVal : 0;
1318 if (lpMax) *lpMax = infoPtr ? infoPtr->maxVal : 0;
1319
1320 return infoPtr ? TRUE : FALSE;
1321 }
1322
1323
1324
1325 /***********************************************************************
1326 * ScrollBarWndProc
1327 */
1328 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1329 {
1330 if (!IsWindow( hwnd )) return 0;
1331
1332 switch(message)
1333 {
1334 case WM_CREATE:
1335 SCROLL_CreateScrollBar(hwnd, (LPCREATESTRUCTW)lParam);
1336 if (!hUpArrow) SCROLL_LoadBitmaps();
1337 break;
1338
1339 case WM_ENABLE:
1340 {
1341 SCROLLBAR_INFO *infoPtr;
1342 if ((infoPtr = SCROLL_GetScrollBarInfo( hwnd, SB_CTL )))
1343 {
1344 infoPtr->flags = wParam ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH;
1345 SCROLL_RefreshScrollBar(hwnd, SB_CTL, TRUE, TRUE);
1346 }
1347 }
1348 return 0;
1349
1350 case WM_LBUTTONDOWN:
1351 {
1352 POINT pt;
1353 pt.x = SLOWORD(lParam);
1354 pt.y = SHIWORD(lParam);
1355 SCROLL_TrackScrollBar( hwnd, SB_CTL, pt );
1356 }
1357 break;
1358 case WM_LBUTTONUP:
1359 case WM_MOUSEMOVE:
1360 case WM_SYSTIMER:
1361 {
1362 POINT pt;
1363 pt.x = SLOWORD(lParam);
1364 pt.y = SHIWORD(lParam);
1365 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1366 }
1367 break;
1368
1369 case WM_KEYDOWN:
1370 SCROLL_HandleKbdEvent(hwnd, wParam, lParam);
1371 break;
1372
1373 case WM_KEYUP:
1374 ShowCaret(hwnd);
1375 break;
1376
1377 case WM_SETFOCUS:
1378 {
1379 /* Create a caret when a ScrollBar get focus */
1380 RECT rect;
1381 int arrowSize, thumbSize, thumbPos, vertical;
1382 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1383 &arrowSize, &thumbSize, &thumbPos );
1384 if (!vertical)
1385 {
1386 CreateCaret(hwnd, (HBITMAP)1, thumbSize-2, rect.bottom-rect.top-2);
1387 SetCaretPos(thumbPos+1, rect.top+1);
1388 }
1389 else
1390 {
1391 CreateCaret(hwnd, (HBITMAP)1, rect.right-rect.left-2,thumbSize-2);
1392 SetCaretPos(rect.top+1, thumbPos+1);
1393 }
1394 ShowCaret(hwnd);
1395 }
1396 break;
1397
1398 case WM_KILLFOCUS:
1399 {
1400 RECT rect;
1401 int arrowSize, thumbSize, thumbPos, vertical;
1402 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1403 if (!vertical){
1404 rect.left=thumbPos+1;
1405 rect.right=rect.left+thumbSize;
1406 }
1407 else
1408 {
1409 rect.top=thumbPos+1;
1410 rect.bottom=rect.top+thumbSize;
1411 }
1412 HideCaret(hwnd);
1413 InvalidateRect(hwnd,&rect,0);
1414 DestroyCaret();
1415 }
1416 break;
1417
1418 case WM_ERASEBKGND:
1419 return 1;
1420
1421 case WM_GETDLGCODE:
1422 return DLGC_WANTARROWS; /* Windows returns this value */
1423
1424 case WM_PAINT:
1425 {
1426 PAINTSTRUCT ps;
1427 HDC hdc = BeginPaint( hwnd, &ps );
1428 if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEBOX)
1429 FillRect( hdc, &ps.rcPaint, GetSysColorBrush(COLOR_SCROLLBAR) );
1430 else
1431 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1432 EndPaint( hwnd, &ps );
1433 }
1434 break;
1435
1436 case SBM_SETPOS16:
1437 case SBM_SETPOS:
1438 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1439
1440 case SBM_GETPOS16:
1441 case SBM_GETPOS:
1442 return SCROLL_GetScrollPos(hwnd, SB_CTL);
1443
1444 case SBM_SETRANGE16:
1445 SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
1446 wParam /* FIXME: Is this correct? */ );
1447 return 0;
1448
1449 case SBM_SETRANGE:
1450 {
1451 INT oldPos = SCROLL_GetScrollPos( hwnd, SB_CTL );
1452 SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
1453 if (oldPos != SCROLL_GetScrollPos( hwnd, SB_CTL )) return oldPos;
1454 }
1455 return 0;
1456
1457 case SBM_GETRANGE16:
1458 FIXME("don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
1459 return 0;
1460
1461 case SBM_GETRANGE:
1462 return SCROLL_GetScrollRange(hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam);
1463
1464 case SBM_ENABLE_ARROWS16:
1465 case SBM_ENABLE_ARROWS:
1466 return EnableScrollBar( hwnd, SB_CTL, wParam );
1467
1468 case SBM_SETRANGEREDRAW:
1469 {
1470 INT oldPos = SCROLL_GetScrollPos( hwnd, SB_CTL );
1471 SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
1472 if (oldPos != SCROLL_GetScrollPos( hwnd, SB_CTL )) return oldPos;
1473 }
1474 return 0;
1475
1476 case SBM_SETSCROLLINFO:
1477 return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1478
1479 case SBM_GETSCROLLINFO:
1480 return SCROLL_GetScrollInfo(hwnd, SB_CTL, (SCROLLINFO *)lParam);
1481
1482 case 0x00e5:
1483 case 0x00e7:
1484 case 0x00e8:
1485 case 0x00eb:
1486 case 0x00ec:
1487 case 0x00ed:
1488 case 0x00ee:
1489 case 0x00ef:
1490 ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1491 message, wParam, lParam );
1492 break;
1493
1494 default:
1495 if (message >= WM_USER)
1496 WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1497 message, wParam, lParam );
1498 return DefWindowProcW( hwnd, message, wParam, lParam );
1499 }
1500 return 0;
1501 }
1502
1503
1504 /*************************************************************************
1505 * SetScrollInfo (USER32.@)
1506 * SetScrollInfo can be used to set the position, upper bound,
1507 * lower bound, and page size of a scrollbar control.
1508 *
1509 * RETURNS
1510 * Scrollbar position
1511 *
1512 * NOTE
1513 * For 100 lines of text to be displayed in a window of 25 lines,
1514 * one would for instance use info->nMin=0, info->nMax=75
1515 * (corresponding to the 76 different positions of the window on
1516 * the text), and info->nPage=25.
1517 */
1518 INT WINAPI SetScrollInfo(
1519 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1520 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1521 const SCROLLINFO *info /* [in] Specifies what to change and new values */,
1522 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1523 {
1524 INT action;
1525 INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1526
1527 if( action & SA_SSI_HIDE )
1528 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1529 else
1530 {
1531 if( action & SA_SSI_SHOW )
1532 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1533 return retVal; /* SetWindowPos() already did the painting */
1534
1535 if( bRedraw && (action & SA_SSI_REFRESH))
1536 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1537 else if( action & SA_SSI_REPAINT_ARROWS )
1538 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1539 }
1540 return retVal;
1541 }
1542
1543 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1544 const SCROLLINFO *info, INT *action )
1545 {
1546 /* Update the scrollbar state and set action flags according to
1547 * what has to be done graphics wise. */
1548
1549 SCROLLBAR_INFO *infoPtr;
1550 UINT new_flags;
1551 BOOL bChangeParams = FALSE; /* don't show/hide scrollbar if params don't change */
1552
1553 *action = 0;
1554
1555 if (!(infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar))) return 0;
1556 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1557 if ((info->cbSize != sizeof(*info)) &&
1558 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1559
1560 if (TRACE_ON(scroll))
1561 {
1562 TRACE("hwnd=%p bar=%d", hwnd, nBar);
1563 if (info->fMask & SIF_PAGE) DPRINTF( " page=%d", info->nPage );
1564 if (info->fMask & SIF_POS) DPRINTF( " pos=%d", info->nPos );
1565 if (info->fMask & SIF_RANGE) DPRINTF( " min=%d max=%d", info->nMin, info->nMax );
1566 DPRINTF("\n");
1567 }
1568
1569 /* Set the page size */
1570
1571 if (info->fMask & SIF_PAGE)
1572 {
1573 if( infoPtr->page != info->nPage )
1574 {
1575 infoPtr->page = info->nPage;
1576 *action |= SA_SSI_REFRESH;
1577 bChangeParams = TRUE;
1578 }
1579 }
1580
1581 /* Set the scroll pos */
1582
1583 if (info->fMask & SIF_POS)
1584 {
1585 if( infoPtr->curVal != info->nPos )
1586 {
1587 infoPtr->curVal = info->nPos;
1588 *action |= SA_SSI_REFRESH;
1589 }
1590 }
1591
1592 /* Set the scroll range */
1593
1594 if (info->fMask & SIF_RANGE)
1595 {
1596 /* Invalid range -> range is set to (0,0) */
1597 if ((info->nMin > info->nMax) ||
1598 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1599 {
1600 infoPtr->minVal = 0;
1601 infoPtr->maxVal = 0;
1602 bChangeParams = TRUE;
1603 }
1604 else
1605 {
1606 if( infoPtr->minVal != info->nMin ||
1607 infoPtr->maxVal != info->nMax )
1608 {
1609 *action |= SA_SSI_REFRESH;
1610 infoPtr->minVal = info->nMin;
1611 infoPtr->maxVal = info->nMax;
1612 bChangeParams = TRUE;
1613 }
1614 }
1615 }
1616
1617 /* Make sure the page size is valid */
1618
1619 if (infoPtr->page < 0) infoPtr->page = 0;
1620 else if (infoPtr->page > infoPtr->maxVal - infoPtr->minVal + 1 )
1621 infoPtr->page = infoPtr->maxVal - infoPtr->minVal + 1;
1622
1623 /* Make sure the pos is inside the range */
1624
1625 if (infoPtr->curVal < infoPtr->minVal)
1626 infoPtr->curVal = infoPtr->minVal;
1627 else if (infoPtr->curVal > infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1628 infoPtr->curVal = infoPtr->maxVal - max( infoPtr->page-1, 0 );
1629
1630 TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1631 infoPtr->page, infoPtr->curVal,
1632 infoPtr->minVal, infoPtr->maxVal );
1633
1634 /* don't change the scrollbar state if SetScrollInfo
1635 * is just called with SIF_DISABLENOSCROLL
1636 */
1637 if(!(info->fMask & SIF_ALL)) goto done;
1638
1639 /* Check if the scrollbar should be hidden or disabled */
1640
1641 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1642 {
1643 new_flags = infoPtr->flags;
1644 if (infoPtr->minVal >= infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1645 {
1646 /* Hide or disable scroll-bar */
1647 if (info->fMask & SIF_DISABLENOSCROLL)
1648 {
1649 new_flags = ESB_DISABLE_BOTH;
1650 *action |= SA_SSI_REFRESH;
1651 }
1652 else if ((nBar != SB_CTL) && bChangeParams)
1653 {
1654 *action = SA_SSI_HIDE;
1655 goto done;
1656 }
1657 }
1658 else /* Show and enable scroll-bar */
1659 {
1660 new_flags = 0;
1661 if ((nBar != SB_CTL) && bChangeParams)
1662 *action |= SA_SSI_SHOW;
1663 }
1664
1665 if (infoPtr->flags != new_flags) /* check arrow flags */
1666 {
1667 infoPtr->flags = new_flags;
1668 *action |= SA_SSI_REPAINT_ARROWS;
1669 }
1670 }
1671
1672 done:
1673 /* Return current position */
1674
1675 return infoPtr->curVal;
1676 }
1677
1678
1679 /*************************************************************************
1680 * GetScrollInfo (USER32.@)
1681 *
1682 * GetScrollInfo can be used to retrieve the position, upper bound,
1683 * lower bound, and page size of a scrollbar control.
1684 *
1685 * RETURNS STD
1686 */
1687 BOOL WINAPI GetScrollInfo(
1688 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1689 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1690 LPSCROLLINFO info /* [in/out] (fMask specifies which values to retrieve) */)
1691 {
1692 TRACE("hwnd=%p nBar=%d info=%p\n", hwnd, nBar, info);
1693
1694 /* Refer SB_CTL requests to the window */
1695 if (nBar == SB_CTL)
1696 return SendMessageA(hwnd, SBM_GETSCROLLINFO, (WPARAM)0, (LPARAM)info);
1697 else
1698 return SCROLL_GetScrollInfo(hwnd, nBar, info);
1699 }
1700
1701
1702 /*************************************************************************
1703 * SetScrollPos (USER32.@)
1704 *
1705 * RETURNS
1706 * Success: Scrollbar position
1707 * Failure: 0
1708 *
1709 * REMARKS
1710 * Note the ambiguity when 0 is returned. Use GetLastError
1711 * to make sure there was an error (and to know which one).
1712 */
1713 INT WINAPI SetScrollPos(
1714 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1715 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1716 INT nPos /* [in] New value */,
1717 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */ )
1718 {
1719 SCROLLINFO info;
1720 SCROLLBAR_INFO *infoPtr;
1721 INT oldPos;
1722
1723 if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar ))) return 0;
1724 oldPos = infoPtr->curVal;
1725 info.cbSize = sizeof(info);
1726 info.nPos = nPos;
1727 info.fMask = SIF_POS;
1728 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1729 return oldPos;
1730 }
1731
1732
1733 /*************************************************************************
1734 * GetScrollPos (USER32.@)
1735 *
1736 * RETURNS
1737 * Success: Current position
1738 * Failure: 0
1739 *
1740 * REMARKS
1741 * There is ambiguity when 0 is returned. Use GetLastError
1742 * to make sure there was an error (and to know which one).
1743 */
1744 INT WINAPI GetScrollPos(
1745 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1746 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1747 {
1748 TRACE("hwnd=%p nBar=%d\n", hwnd, nBar);
1749
1750 /* Refer SB_CTL requests to the window */
1751 if (nBar == SB_CTL)
1752 return SendMessageA(hwnd, SBM_GETPOS, (WPARAM)0, (LPARAM)0);
1753 else
1754 return SCROLL_GetScrollPos(hwnd, nBar);
1755 }
1756
1757
1758 /*************************************************************************
1759 * SetScrollRange (USER32.@)
1760 *
1761 * RETURNS STD
1762 */
1763 BOOL WINAPI SetScrollRange(
1764 HWND hwnd, /* [in] Handle of window whose scrollbar will be affected */
1765 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1766 INT minVal, /* [in] New minimum value */
1767 INT maxVal, /* [in] New maximum value */
1768 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1769 {
1770 SCROLLINFO info;
1771
1772 info.cbSize = sizeof(info);
1773 info.nMin = minVal;
1774 info.nMax = maxVal;
1775 info.fMask = SIF_RANGE;
1776 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1777 return TRUE;
1778 }
1779
1780
1781 /*************************************************************************
1782 * SCROLL_SetNCSbState
1783 *
1784 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1785 */
1786 INT SCROLL_SetNCSbState(HWND hwnd, int vMin, int vMax, int vPos,
1787 int hMin, int hMax, int hPos)
1788 {
1789 INT vA, hA;
1790 SCROLLINFO vInfo, hInfo;
1791
1792 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1793 vInfo.nMin = vMin;
1794 vInfo.nMax = vMax;
1795 vInfo.nPos = vPos;
1796 hInfo.nMin = hMin;
1797 hInfo.nMax = hMax;
1798 hInfo.nPos = hPos;
1799 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1800
1801 SCROLL_SetScrollInfo( hwnd, SB_VERT, &vInfo, &vA );
1802 SCROLL_SetScrollInfo( hwnd, SB_HORZ, &hInfo, &hA );
1803
1804 if( !SCROLL_ShowScrollBar( hwnd, SB_BOTH,
1805 (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1806 {
1807 /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1808 if( vA & SA_SSI_REFRESH )
1809 SCROLL_RefreshScrollBar( hwnd, SB_VERT, FALSE, TRUE );
1810
1811 if( hA & SA_SSI_REFRESH )
1812 SCROLL_RefreshScrollBar( hwnd, SB_HORZ, FALSE, TRUE );
1813 }
1814 return 0;
1815 }
1816
1817
1818 /*************************************************************************
1819 * GetScrollRange (USER32.@)
1820 *
1821 * RETURNS STD
1822 */
1823 BOOL WINAPI GetScrollRange(
1824 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1825 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1826 LPINT lpMin /* [out] Where to store minimum value */,
1827 LPINT lpMax /* [out] Where to store maximum value */)
1828 {
1829 TRACE("hwnd=%p nBar=%d lpMin=%p lpMax=%p\n", hwnd, nBar, lpMin, lpMax);
1830
1831 /* Refer SB_CTL requests to the window */
1832 if (nBar == SB_CTL)
1833 return SendMessageA(hwnd, SBM_GETRANGE, (WPARAM)lpMin, (LPARAM)lpMax);
1834 else
1835 return SCROLL_GetScrollRange(hwnd, nBar, lpMin, lpMax);
1836 }
1837
1838
1839 /*************************************************************************
1840 * SCROLL_ShowScrollBar()
1841 *
1842 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1843 */
1844 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1845 BOOL fShowH, BOOL fShowV )
1846 {
1847 LONG style = GetWindowLongW( hwnd, GWL_STYLE );
1848
1849 TRACE("hwnd=%p bar=%d horz=%d, vert=%d\n", hwnd, nBar, fShowH, fShowV );
1850
1851 switch(nBar)
1852 {
1853 case SB_CTL:
1854 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1855 return TRUE;
1856
1857 case SB_BOTH:
1858 case SB_HORZ:
1859 if (fShowH)
1860 {
1861 fShowH = !(style & WS_HSCROLL);
1862 style |= WS_HSCROLL;
1863 }
1864 else /* hide it */
1865 {
1866 fShowH = (style & WS_HSCROLL);
1867 style &= ~WS_HSCROLL;
1868 }
1869 if( nBar == SB_HORZ ) {
1870 fShowV = FALSE;
1871 break;
1872 }
1873 /* fall through */
1874
1875 case SB_VERT:
1876 if (fShowV)
1877 {
1878 fShowV = !(style & WS_VSCROLL);
1879 style |= WS_VSCROLL;
1880 }
1881 else /* hide it */
1882 {
1883 fShowV = (style & WS_VSCROLL);
1884 style &= ~WS_VSCROLL;
1885 }
1886 if ( nBar == SB_VERT )
1887 fShowH = FALSE;
1888 break;
1889
1890 default:
1891 return FALSE; /* Nothing to do! */
1892 }
1893
1894 if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1895 {
1896 WIN_SetStyle( hwnd, style );
1897 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1898 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1899 return TRUE;
1900 }
1901 return FALSE; /* no frame changes */
1902 }
1903
1904
1905 /*************************************************************************
1906 * ShowScrollBar (USER32.@)
1907 *
1908 * RETURNS STD
1909 */
1910 BOOL WINAPI ShowScrollBar(
1911 HWND hwnd, /* [in] Handle of window whose scrollbar(s) will be affected */
1912 INT nBar, /* [in] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1913 BOOL fShow /* [in] TRUE = show, FALSE = hide */)
1914 {
1915 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1916 (nBar == SB_HORZ) ? 0 : fShow );
1917 return TRUE;
1918 }
1919
1920
1921 /*************************************************************************
1922 * EnableScrollBar (USER32.@)
1923 */
1924 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1925 {
1926 BOOL bFineWithMe;
1927 SCROLLBAR_INFO *infoPtr;
1928
1929 TRACE("%p %d %d\n", hwnd, nBar, flags );
1930
1931 flags &= ESB_DISABLE_BOTH;
1932
1933 if (nBar == SB_BOTH)
1934 {
1935 if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, SB_VERT ))) return FALSE;
1936 if (!(bFineWithMe = (infoPtr->flags == flags)) )
1937 {
1938 infoPtr->flags = flags;
1939 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1940 }
1941 nBar = SB_HORZ;
1942 }
1943 else
1944 bFineWithMe = TRUE;
1945
1946 if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar ))) return FALSE;
1947 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1948 infoPtr->flags = flags;
1949
1950 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1951 return TRUE;
1952 }
Windows API implementation