source: trunk/src/user32/scroll.cpp@ 1828

Last change on this file since 1828 was 1828, checked in by cbratschi, 26 years ago

added button styles and messages, bug fixes
File size: 54.3 KB
Line 
1/* $Id: scroll.cpp,v 1.25 1999-11-24 18:21:37 cbratschi Exp $ */
2/*
3 * Scrollbar control
4 *
5 * Copyright 1999 Christoph Bratschi
6 *
7 * Copyright 1993 Martin Ayotte
8 * Copyright 1994, 1996 Alexandre Julliard
9 *
10 * WINE version: 991031
11 *
12 * Status: complete
13 * Version: 5.00
14 */
15
16#include <stdlib.h>
17#include <os2win.h>
18#include "controls.h"
19#include "scroll.h"
20#include "win32wbase.h"
21#include "oslibwin.h"
22#include "initterm.h"
23#include "pmframe.h"
24
25#define SCROLL_MIN_RECT 4 /* Minimum size of the rectangle between the arrows */
26#define SCROLL_MIN_THUMB 6 /* Minimum size of the thumb in pixels */
27
28#define SCROLL_ARROW_THUMB_OVERLAP 0 /* Overlap between arrows and thumb */
29
30#define SCROLL_FIRST_DELAY 200 /* Delay (in ms) before first repetition when holding the button down */
31#define SCROLL_REPEAT_DELAY 50 /* Delay (in ms) between scroll repetitions */
32#define SCROLL_BLINK_DELAY 1000
33
34#define SCROLL_TIMER 0 /* Scroll timer id */
35#define BLINK_TIMER 1
36
37 /* Scroll-bar hit testing */
38enum SCROLL_HITTEST
39{
40 SCROLL_NOWHERE, /* Outside the scroll bar */
41 SCROLL_TOP_ARROW, /* Top or left arrow */
42 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
43 SCROLL_THUMB, /* Thumb rectangle */
44 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
45 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
46};
47
48 /* What to do in SetScrollInfo() */
49#define SA_SSI_HIDE 0x0001
50#define SA_SSI_SHOW 0x0002
51#define SA_SSI_REPAINT_INTERIOR 0x0004
52#define SA_SSI_REPAINT_ARROWS 0x0008
53#define SA_SSI_MOVE_THUMB 0x0010
54#define SA_SSI_REFRESH 0x0020
55
56 /* Thumb-tracking info */
57static HWND SCROLL_TrackingWin = 0;
58static INT SCROLL_TrackingBar = 0;
59static INT SCROLL_TrackingPos = 0;
60static INT SCROLL_TrackingVal = 0;
61 /* Focus info */
62static HWND SCROLL_FocusWin = 0;
63static BOOL SCROLL_HasFocus = FALSE;
64static BOOL SCROLL_Highlighted = FALSE;
65static BOOL SCROLL_Scrolling = FALSE;
66
67 /* Hit test code of the last button-down event */
68static enum SCROLL_HITTEST SCROLL_trackHitTest;
69static enum SCROLL_HITTEST SCROLL_lastHitTest;
70static BOOL SCROLL_trackVertical;
71
72 /* Is the moving thumb being displayed? */
73static BOOL SCROLL_MovingThumb = FALSE;
74
75// Get the scrollbar handle: works only with frame/control handles
76
77static HWND SCROLL_GetScrollHandle(HWND hwnd,INT nBar)
78{
79 switch(nBar)
80 {
81 case SB_HORZ:
82 case SB_VERT:
83 {
84 Win32BaseWindow *win32wnd = Win32BaseWindow::GetWindowFromHandle(hwnd);
85 if (!win32wnd) return 0;
86 if (nBar == SB_HORZ) return Win32BaseWindow::OS2ToWin32Handle(win32wnd->getHorzScrollHandle());
87 else return Win32BaseWindow::OS2ToWin32Handle(win32wnd->getVertScrollHandle());
88 }
89 case SB_CTL:
90 return hwnd;
91
92 default:
93 return 0;
94 }
95}
96
97static HWND SCROLL_GetFrameHandle(HWND hwnd)
98{
99 Win32BaseWindow *win32wnd = Win32BaseWindow::GetWindowFromHandle(hwnd);
100
101 if (!win32wnd) return 0;
102 return Win32BaseWindow::GetWindowFromOS2FrameHandle(OSLibWinQueryWindow(win32wnd->getOS2WindowHandle(),QWOS_OWNER))->getWindowHandle();
103}
104
105// Get the infoPtr: works only with scrollbar handles
106
107static SCROLLBAR_INFO *SCROLL_GetInfoPtr( HWND hwnd, INT nBar )
108{
109 Win32BaseWindow *win32wnd;
110 HWND hwndFrame;
111
112 switch(nBar)
113 {
114 case SB_HORZ:
115 case SB_VERT:
116 win32wnd = Win32BaseWindow::GetWindowFromHandle(hwnd);
117 if (!win32wnd) return NULL;
118 hwndFrame = OSLibWinQueryWindow(win32wnd->getOS2WindowHandle(),QWOS_OWNER);
119 win32wnd = Win32BaseWindow::GetWindowFromOS2FrameHandle(hwndFrame);
120 if (!win32wnd) return NULL;
121 return win32wnd->getScrollInfo(nBar);
122
123 case SB_CTL:
124 return (SCROLLBAR_INFO*)GetInfoPtr(hwnd);
125 }
126
127 return NULL;
128}
129
130/* Scrollbar Functions */
131
132/***********************************************************************
133 * SCROLL_GetScrollBarRect
134 *
135 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
136 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
137 * 'arrowSize' returns the width or height of an arrow (depending on
138 * the orientation of the scrollbar), 'thumbSize' returns the size of
139 * the thumb, and 'thumbPos' returns the position of the thumb
140 * relative to the left or to the top.
141 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
142 */
143static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
144 INT *arrowSize, INT *thumbSize,
145 INT *thumbPos )
146{
147 INT pixels;
148 BOOL vertical;
149 RECT rectClient;
150
151 switch(nBar)
152 {
153 case SB_HORZ:
154 case SB_VERT:
155 GetClientRect( hwnd, lprect );
156 vertical = (nBar == SB_VERT);
157 break;
158
159 case SB_CTL:
160 {
161 DWORD dwStyle = GetWindowLongA(hwnd,GWL_STYLE);
162
163 GetClientRect( hwnd, lprect );
164 vertical = ((dwStyle & SBS_VERT) != 0);
165 break;
166 }
167
168 default:
169 return FALSE;
170 }
171
172 if (vertical) pixels = lprect->bottom - lprect->top;
173 else pixels = lprect->right - lprect->left;
174
175 if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
176 {
177 if (pixels > SCROLL_MIN_RECT)
178 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
179 else
180 *arrowSize = 0;
181 *thumbPos = *thumbSize = 0;
182 }
183 else
184 {
185 SCROLLBAR_INFO *info = SCROLL_GetInfoPtr( hwnd, nBar );
186
187 *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
188 pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
189
190 if (info->Page)
191 {
192 *thumbSize = pixels * info->Page / (info->MaxVal-info->MinVal+1);
193 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
194 }
195 else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
196
197 if (((pixels -= *thumbSize ) < 0) ||
198 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
199 {
200 /* Rectangle too small or scrollbar disabled -> no thumb */
201 *thumbPos = *thumbSize = 0;
202 }
203 else
204 {
205 INT max = info->MaxVal - MAX( info->Page-1, 0 );
206 if (info->MinVal >= max)
207 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
208 else
209 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
210 + pixels * (info->CurVal-info->MinVal) / (max - info->MinVal);
211 }
212 }
213 return vertical;
214}
215
216/***********************************************************************
217 * SCROLL_PtInRectEx
218 */
219static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
220{
221 RECT rect = *lpRect;
222
223 if (vertical)
224 {
225 INT w = lpRect->right-lpRect->left;
226
227 rect.left -= w;
228 rect.right += w;
229 rect.top -= w;
230 rect.bottom += w;
231 } else
232 {
233 INT h = lpRect->bottom-lpRect->top;
234
235 rect.top -= h;
236 rect.bottom += h;
237 rect.left -= h;
238 rect.right += h;
239 }
240
241 return PtInRect( &rect, pt );
242}
243
244/***********************************************************************
245 * SCROLL_HitTest
246 *
247 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
248 */
249static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
250 POINT pt, BOOL bDragging )
251{
252 INT arrowSize, thumbSize, thumbPos;
253 RECT rect;
254 SCROLLBAR_INFO *infoPtr = SCROLL_GetInfoPtr(hwnd,nBar);
255
256 if (!infoPtr) return SCROLL_NOWHERE;
257
258 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
259 &arrowSize, &thumbSize, &thumbPos );
260
261 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
262 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
263
264 if (vertical)
265 {
266 if (pt.y < rect.top + arrowSize) return (infoPtr->flags & ESB_DISABLE_LTUP) ? SCROLL_NOWHERE:SCROLL_TOP_ARROW;
267 if (pt.y >= rect.bottom - arrowSize) return (infoPtr->flags & ESB_DISABLE_RTDN) ? SCROLL_NOWHERE:SCROLL_BOTTOM_ARROW;
268 if (!thumbPos) return ((infoPtr->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH) ? SCROLL_NOWHERE:SCROLL_TOP_RECT;
269 pt.y -= rect.top;
270 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
271 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
272 }
273 else /* horizontal */
274 {
275 if (pt.x < rect.left + arrowSize) return (infoPtr->flags & ESB_DISABLE_LTUP) ? SCROLL_NOWHERE:SCROLL_TOP_ARROW;
276 if (pt.x >= rect.right - arrowSize) return (infoPtr->flags & ESB_DISABLE_RTDN) ? SCROLL_NOWHERE:SCROLL_BOTTOM_ARROW;
277 if (!thumbPos) return ((infoPtr->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH) ? SCROLL_NOWHERE:SCROLL_TOP_RECT;
278 pt.x -= rect.left;
279 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
280 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
281 }
282 return SCROLL_THUMB;
283}
284
285static void SCROLL_DrawTopArrow(HDC hdc,SCROLLBAR_INFO *infoPtr,RECT *rect,INT arrowSize,BOOL vertical,BOOL top_pressed)
286{
287 RECT r;
288
289 r = *rect;
290 if( vertical )
291 r.bottom = r.top + arrowSize;
292 else
293 r.right = r.left + arrowSize;
294
295 DrawFrameControl( hdc, &r, DFC_SCROLL,
296 (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
297 | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
298 | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
299}
300
301static void SCROLL_DrawBottomArrow(HDC hdc,SCROLLBAR_INFO *infoPtr,RECT *rect,INT arrowSize,BOOL vertical,BOOL bottom_pressed)
302{
303 RECT r;
304
305 r = *rect;
306 if( vertical )
307 r.top = r.bottom-arrowSize;
308 else
309 r.left = r.right-arrowSize;
310
311 DrawFrameControl( hdc, &r, DFC_SCROLL,
312 (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
313 | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
314 | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
315}
316
317/***********************************************************************
318 * SCROLL_DrawArrows
319 *
320 * Draw the scroll bar arrows.
321 */
322static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
323 RECT *rect, INT arrowSize, BOOL vertical,
324 BOOL top_pressed, BOOL bottom_pressed )
325{
326 SCROLL_DrawTopArrow(hdc,infoPtr,rect,arrowSize,vertical,top_pressed);
327 SCROLL_DrawBottomArrow(hdc,infoPtr,rect,arrowSize,vertical,bottom_pressed);
328}
329
330static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
331 RECT *rect, INT arrowSize,
332 INT thumbSize, INT thumbPos,
333 UINT flags, BOOL vertical,
334 BOOL top_selected, BOOL bottom_selected )
335{
336 RECT r;
337 HPEN hSavePen;
338 HBRUSH hSaveBrush,hBrush;
339
340 /* Select the correct brush and pen */
341
342 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
343 * The window-owned scrollbars need to call DEFWND_ControlColor
344 * to correctly setup default scrollbar colors
345 */
346 if (nBar == SB_CTL) {
347 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
348 (WPARAM)hdc,(LPARAM)hwnd);
349 } else {
350 hBrush = (HBRUSH)SendMessageA( hwnd, WM_CTLCOLORSCROLLBAR,
351 (WPARAM)hdc,(LPARAM)hwnd);
352
353 }
354
355 hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
356 hSaveBrush = SelectObject( hdc, hBrush );
357
358 /* Calculate the scroll rectangle */
359
360 r = *rect;
361 if (vertical)
362 {
363 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
364 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
365 }
366 else
367 {
368 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
369 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
370 }
371
372 /* Draw the scroll rectangles and thumb */
373 if (!thumbPos) /* No thumb to draw */
374 {
375 PatBlt( hdc, r.left, r.top,
376 r.right - r.left, r.bottom - r.top,
377 PATCOPY );
378
379 /* cleanup and return */
380 SelectObject( hdc, hSavePen );
381 SelectObject( hdc, hSaveBrush );
382 return;
383 }
384
385 if (vertical)
386 {
387 PatBlt( hdc, r.left, r.top,
388 r.right - r.left,
389 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
390 top_selected ? 0x0f0000 : PATCOPY );
391 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
392 PatBlt( hdc, r.left, r.top + thumbSize,
393 r.right - r.left,
394 r.bottom - r.top - thumbSize,
395 bottom_selected ? 0x0f0000 : PATCOPY );
396 r.bottom = r.top + thumbSize;
397 }
398 else /* horizontal */
399 {
400 PatBlt( hdc, r.left, r.top,
401 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
402 r.bottom - r.top,
403 top_selected ? 0x0f0000 : PATCOPY );
404 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
405 PatBlt( hdc, r.left + thumbSize, r.top,
406 r.right - r.left - thumbSize,
407 r.bottom - r.top,
408 bottom_selected ? 0x0f0000 : PATCOPY );
409 r.right = r.left + thumbSize;
410 }
411
412 /* Draw the thumb */
413
414 DrawEdge(hdc,&r,EDGE_RAISED,BF_RECT | BF_ADJUST);
415 FillRect(hdc,&r,(SCROLL_FocusWin == hwnd && SCROLL_Highlighted && !SCROLL_Scrolling) ? GetSysColorBrush(COLOR_3DSHADOW):GetSysColorBrush(COLOR_BTNFACE));
416
417 /* cleanup */
418 SelectObject( hdc, hSavePen );
419 SelectObject( hdc, hSaveBrush );
420}
421
422/***********************************************************************
423 * SCROLL_DrawMovingThumb
424 *
425 * Draw the moving thumb rectangle.
426 */
427static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
428 INT arrowSize, INT thumbSize )
429{
430 INT pos = SCROLL_TrackingPos;
431 INT max_size;
432
433 if( vertical )
434 max_size = rect->bottom - rect->top;
435 else
436 max_size = rect->right - rect->left;
437
438 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
439
440 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
441 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
442 else if( pos > max_size )
443 pos = max_size;
444
445 SCROLL_DrawInterior( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
446 rect, arrowSize, thumbSize, pos,
447 0, vertical, FALSE, FALSE );
448}
449
450/***********************************************************************
451 * SCROLL_ClipPos
452 */
453static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
454{
455 if( pt.x < lpRect->left )
456 pt.x = lpRect->left;
457 else
458 if( pt.x >= lpRect->right )
459 pt.x = lpRect->right-1;
460
461 if( pt.y < lpRect->top )
462 pt.y = lpRect->top;
463 else
464 if( pt.y >= lpRect->bottom )
465 pt.y = lpRect->bottom-1;
466
467 return pt;
468}
469
470/***********************************************************************
471 * SCROLL_GetThumbVal
472 *
473 * Compute the current scroll position based on the thumb position in pixels
474 * from the top of the scroll-bar.
475 */
476static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
477 BOOL vertical, INT pos )
478{
479 INT thumbSize;
480 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
481
482 if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
483 return infoPtr->MinVal;
484
485 if (infoPtr->Page)
486 {
487 thumbSize = pixels * infoPtr->Page/(infoPtr->MaxVal-infoPtr->MinVal+1);
488 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
489 }
490 else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
491
492 if ((pixels -= thumbSize) <= 0) return infoPtr->MinVal;
493
494 pos = MAX( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
495 if (pos > pixels) pos = pixels;
496
497 if (!infoPtr->Page) pos *= infoPtr->MaxVal - infoPtr->MinVal;
498 else pos *= infoPtr->MaxVal - infoPtr->MinVal - infoPtr->Page + 1;
499 return infoPtr->MinVal + ((pos + pixels / 2) / pixels);
500}
501
502void SCROLL_GetSizeBox(HWND hwnd,DWORD dwStyle,PRECT rect)
503{
504 RECT clientRect;
505 INT cx = GetSystemMetrics(SM_CXVSCROLL);
506 INT cy = GetSystemMetrics(SM_CYHSCROLL);
507
508 GetClientRect(hwnd,&clientRect);
509
510 if (dwStyle & SBS_SIZEBOXTOPLEFTALIGN)
511 {
512 rect->left = 0;
513 rect->right = cx;
514 rect->bottom = cy;
515 rect->top = 0;
516 } else
517 {
518 rect->left = clientRect.right-cx;
519 rect->right = clientRect.right;
520 rect->bottom = clientRect.bottom;
521 rect->top = clientRect.bottom-cy;
522 }
523}
524
525void SCROLL_DrawSizeBox(HDC hdc,RECT rect)
526{
527 POINT p1,p2;
528 HPEN penDark = GetSysColorPen(COLOR_3DSHADOW);
529 HPEN penWhite = GetSysColorPen(COLOR_3DHILIGHT);
530 HPEN oldPen = SelectObject(hdc,penDark);
531 INT x;
532
533 p1.x = rect.right-1;
534 p1.y = rect.bottom;
535 p2.x = rect.right;
536 p2.y = rect.bottom-1;
537 for (x = 0;x < 3;x++)
538 {
539 SelectObject(hdc,penDark);
540 MoveToEx(hdc,p1.x,p1.y,NULL);
541 LineTo(hdc,p2.x,p2.y);
542 p1.x--;
543 p2.y--;
544 MoveToEx(hdc,p1.x,p1.y,NULL);
545 LineTo(hdc,p2.x,p2.y);
546 SelectObject(hdc,penWhite);
547 p1.x--;
548 p2.y--;
549 MoveToEx(hdc,p1.x,p1.y,NULL);
550 LineTo(hdc,p2.x,p2.y);
551 p1.x -= 2;
552 p2.y -= 2;
553 }
554
555 SelectObject(hdc,oldPen);
556}
557
558/***********************************************************************
559 * SCROLL_DrawScrollBar
560 *
561 * Redraw the whole scrollbar.
562 */
563void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
564 BOOL arrows, BOOL interior )
565{
566 INT arrowSize, thumbSize, thumbPos;
567 RECT rect;
568 BOOL vertical;
569 SCROLLBAR_INFO *infoPtr = SCROLL_GetInfoPtr( hwnd, nBar );
570
571 if (!infoPtr) return;
572 if (nBar == SB_CTL)
573 {
574 DWORD dwStyle = GetWindowLongA(hwnd,GWL_STYLE);
575
576 if (dwStyle & (SBS_SIZEBOX | SBS_SIZEGRIP))
577 {
578 RECT rect;
579 HBRUSH hBrush;
580
581 hdc = GetDC(hwnd);
582 hBrush = GetSysColorBrush(COLOR_3DFACE);
583 GetClientRect(hwnd,&rect);
584 FillRect(hdc,&rect,hBrush);
585
586 if (dwStyle & SBS_SIZEGRIP)
587 {
588 SCROLL_GetSizeBox(hwnd,dwStyle,&rect);
589 SCROLL_DrawSizeBox(hdc,rect);
590 }
591
592 ReleaseDC(hwnd,hdc);
593
594 return;
595 }
596 }
597
598 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
599 &arrowSize, &thumbSize, &thumbPos );
600
601 /* Draw the arrows */
602
603 if (arrows && arrowSize)
604 {
605 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
606 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
607 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
608 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
609 else
610 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
611 FALSE, FALSE );
612 }
613
614 if (SCROLL_MovingThumb &&
615 (SCROLL_TrackingWin == hwnd) &&
616 (SCROLL_TrackingBar == nBar))
617 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
618 else if( interior )
619 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
620 thumbPos, infoPtr->flags, vertical, SCROLL_trackHitTest == SCROLL_TOP_RECT && SCROLL_lastHitTest == SCROLL_TOP_RECT,SCROLL_trackHitTest == SCROLL_BOTTOM_RECT && SCROLL_lastHitTest == SCROLL_BOTTOM_RECT);
621}
622
623/***********************************************************************
624 * SCROLL_RefreshScrollBar
625 *
626 * Repaint the scroll bar interior after a SetScrollRange() or
627 * SetScrollPos() call.
628 */
629static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
630 BOOL arrows, BOOL interior )
631{
632 Win32BaseWindow *window;
633 HDC hdc;
634
635 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
636
637 if (!hdc) return;
638
639 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
640 ReleaseDC( hwnd, hdc );
641}
642
643/* Message Handler */
644
645LRESULT SCROLL_NCCreate(HWND hwnd,WPARAM wParam,LPARAM lParam)
646{
647 SCROLLBAR_INFO *infoPtr = (SCROLLBAR_INFO*)malloc(sizeof(SCROLLBAR_INFO));
648
649 infoPtr->MinVal = infoPtr->CurVal = infoPtr->Page = 0;
650 infoPtr->MaxVal = 100;
651 infoPtr->flags = ESB_ENABLE_BOTH;
652
653 SetInfoPtr(hwnd,(DWORD)infoPtr);
654
655 return TRUE;
656}
657
658LRESULT SCROLL_Create(HWND hwnd,WPARAM wParam,LPARAM lParam)
659{
660 CREATESTRUCTA *lpCreat = (CREATESTRUCTA *)lParam;
661
662 if (!(lpCreat->style & (SBS_SIZEBOX | SBS_SIZEGRIP)) && lpCreat->style & (SBS_LEFTALIGN | SBS_RIGHTALIGN))
663 {
664 if (lpCreat->style & SBS_VERT)
665 {
666 INT w,h;
667
668 w = GetSystemMetrics(SM_CXVSCROLL);
669 h = lpCreat->cy;
670
671 if (lpCreat->style & SBS_LEFTALIGN)
672 MoveWindow(hwnd,lpCreat->x,lpCreat->y,w,h,FALSE);
673 else if (lpCreat->style & SBS_RIGHTALIGN)
674 MoveWindow(hwnd,lpCreat->x+lpCreat->cx-w,lpCreat->y,w,h,FALSE);
675 } else /* SBS_HORZ */
676 {
677 INT w,h;
678
679 w = lpCreat->cx;
680 h = GetSystemMetrics(SM_CYHSCROLL);
681
682 if (lpCreat->style & SBS_TOPALIGN)
683 MoveWindow(hwnd,lpCreat->x,lpCreat->y,w,h,FALSE);
684 else if (lpCreat->style & SBS_BOTTOMALIGN)
685 MoveWindow(hwnd,lpCreat->x,lpCreat->y+lpCreat->cy-h,w,h,FALSE);
686 }
687 }
688
689 return 0;
690}
691
692/***********************************************************************
693 * SCROLL_HandleScrollEvent
694 *
695 * Handle a mouse or timer event for the scrollbar.
696 * 'pt' is the location of the mouse event in client (for SB_CTL) or
697 * windows coordinates.
698 */
699LRESULT SCROLL_HandleScrollEvent(HWND hwnd,WPARAM wParam,LPARAM lParam,INT nBar,UINT msg)
700{
701 static POINT prevPt; /* Previous mouse position for timer events */
702 static UINT trackThumbPos; /* Thumb position when tracking started. */
703 static BOOL thumbTrackSent;
704 static INT lastClickPos; /* Position in the scroll-bar of the last button-down event. */
705 static INT lastMousePos; /* Position in the scroll-bar of the last mouse event. */
706 static BOOL timerRunning;
707
708 enum SCROLL_HITTEST hittest;
709 HWND hwndOwner, hwndCtl;
710 BOOL vertical;
711 INT arrowSize, thumbSize, thumbPos;
712 RECT rect;
713 HDC hdc;
714 POINT pt;
715 LRESULT res = 0;
716
717 SCROLLBAR_INFO *infoPtr = SCROLL_GetInfoPtr(hwnd,nBar);
718 if (!infoPtr) return res;
719
720 if (nBar == SB_CTL)
721 {
722 DWORD dwStyle = GetWindowLongA(hwnd,GWL_STYLE);
723
724 if ((dwStyle & (SBS_SIZEBOX | SBS_SIZEGRIP)))
725 {
726 if (!(dwStyle & SBS_SIZEGRIP)) return res;
727
728 if (msg == WM_SETCURSOR)
729 {
730 RECT rect;
731
732 SCROLL_GetSizeBox(hwnd,dwStyle,&rect);
733 GetCursorPos(&pt);
734 ScreenToClient(hwnd,&pt);
735
736 if (PtInRect(&rect,pt))
737 {
738 SetCursor(LoadCursorA(0,IDC_SIZENWSEA));
739 return TRUE;
740 }
741
742 return DefWindowProcA(hwnd,WM_SETCURSOR,wParam,lParam);
743 } else if (msg == WM_LBUTTONDOWN)
744 {
745 if (dwStyle & SBS_SIZEGRIP)
746 {
747 RECT rect;
748
749 pt.x = (SHORT)LOWORD(lParam);
750 pt.y = (SHORT)HIWORD(lParam);
751 SCROLL_GetSizeBox(hwnd,dwStyle,&rect);
752 if (PtInRect(&rect,pt))
753 {
754 HWND hwndFrame;
755
756 Win32BaseWindow *win32wnd = Win32BaseWindow::GetWindowFromHandle(hwnd);
757 if (!win32wnd) return res;
758 hwndFrame = OSLibWinQueryWindow(win32wnd->getOS2WindowHandle(),QWOS_OWNER);
759 win32wnd = Win32BaseWindow::GetWindowFromOS2FrameHandle(hwndFrame);
760 if (!win32wnd) return res;
761 FrameTrackFrame(win32wnd,dwStyle & SBS_SIZEBOXTOPLEFTALIGN);
762 }
763 }
764 }
765
766 return res;
767 }
768 }
769
770 if (msg == WM_SETCURSOR) return DefWindowProcA(hwnd,WM_SETCURSOR,wParam,lParam);
771 if (!SCROLL_Scrolling && msg != WM_LBUTTONDOWN) return res;
772
773 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
774 &arrowSize, &thumbSize, &thumbPos );
775 if (nBar == SB_CTL) hwndOwner = GetParent(hwnd); else
776 {
777 Win32BaseWindow *win32wnd;
778 HWND hwndFrame;
779
780 win32wnd = Win32BaseWindow::GetWindowFromHandle(hwnd);
781 if (!win32wnd) return res;
782 hwndFrame = OSLibWinQueryWindow(win32wnd->getOS2WindowHandle(),QWOS_OWNER);
783 win32wnd = Win32BaseWindow::GetWindowFromOS2FrameHandle(hwndFrame);
784 if (!win32wnd) return res;
785 hwndOwner = win32wnd->getWindowHandle();
786 }
787
788 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
789
790 switch (msg)
791 {
792 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
793 pt.x = (SHORT)LOWORD(lParam);
794 pt.y = (SHORT)HIWORD(lParam);
795 SCROLL_trackVertical = vertical;
796 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
797 if (SCROLL_trackHitTest == SCROLL_NOWHERE)
798 {
799 MessageBeep(MB_ICONEXCLAMATION);
800
801 return res;
802 }
803 SCROLL_Scrolling = TRUE;
804 timerRunning = FALSE;
805 if (SCROLL_FocusWin == hwnd && SCROLL_Highlighted)
806 {
807 hdc = GetDCEx(hwnd,0,DCX_CACHE);
808 SCROLL_DrawScrollBar(hwnd,hdc,nBar,FALSE,TRUE);
809 ReleaseDC(hwnd,hdc);
810 }
811 lastClickPos = vertical ? pt.y:pt.x;
812 lastMousePos = lastClickPos;
813 trackThumbPos = thumbPos;
814 prevPt = pt;
815 SetCapture( hwnd );
816 if (nBar == SB_CTL) SetFocus( hwnd );
817 break;
818
819 case WM_MOUSEMOVE:
820 pt.x = (SHORT)LOWORD(lParam);
821 pt.y = (SHORT)HIWORD(lParam);
822 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
823 prevPt = pt;
824 break;
825
826 case WM_LBUTTONUP:
827 if (SCROLL_Scrolling)
828 {
829 pt.x = (SHORT)LOWORD(lParam);
830 pt.y = (SHORT)HIWORD(lParam);
831 hittest = SCROLL_NOWHERE;
832 ReleaseCapture();
833 SCROLL_Scrolling = FALSE;
834 } else return res;
835 break;
836
837 case WM_CAPTURECHANGED:
838 if (SCROLL_Scrolling)
839 {
840 hittest = SCROLL_NOWHERE;
841 SCROLL_Scrolling = FALSE;
842 } else return res;
843 break;
844
845 case WM_SETFOCUS:
846 if (nBar == SB_CTL)
847 {
848 SCROLL_FocusWin = hwnd;
849 SCROLL_HasFocus = TRUE;
850 SCROLL_Highlighted = FALSE;
851 SetSystemTimer(hwnd,BLINK_TIMER,SCROLL_BLINK_DELAY,(TIMERPROC)0);
852 }
853 return res;
854
855 case WM_KILLFOCUS:
856 if (SCROLL_FocusWin == hwnd)
857 {
858 SCROLL_FocusWin = 0;
859 SCROLL_HasFocus = FALSE;
860 if (SCROLL_Highlighted)
861 {
862 SCROLL_Highlighted = FALSE;
863 hdc = GetDCEx(hwnd,0,DCX_CACHE);
864 SCROLL_DrawScrollBar(hwnd,hdc,nBar,FALSE,TRUE);
865 ReleaseDC(hwnd,hdc);
866 }
867 KillSystemTimer(hwnd,BLINK_TIMER);
868 }
869 return res;
870
871 case WM_SYSTIMER:
872 if (wParam == SCROLL_TIMER)
873 {
874 pt = prevPt;
875 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
876 break;
877 } else if (wParam == BLINK_TIMER)
878 {
879 SCROLL_Highlighted = ~SCROLL_Highlighted;
880 if (!SCROLL_Scrolling)
881 {
882 hdc = GetDCEx(hwnd,0,DCX_CACHE);
883 SCROLL_DrawScrollBar(hwnd,hdc,nBar,FALSE,TRUE);
884 ReleaseDC(hwnd,hdc);
885 }
886 return res;
887 } else return res;
888
889 default:
890 return res; /* Should never happen */
891 }
892
893 hdc = GetDCEx(hwnd,0,DCX_CACHE | ((nBar == SB_CTL) ? 0:DCX_WINDOW));
894
895 switch(SCROLL_trackHitTest)
896 {
897 case SCROLL_NOWHERE: /* No tracking in progress */
898 break;
899
900 case SCROLL_TOP_ARROW:
901 if (msg == WM_LBUTTONUP || msg == WM_CAPTURECHANGED)
902 KillSystemTimer(hwnd,SCROLL_TIMER);
903 else if (msg == WM_LBUTTONDOWN || (!timerRunning && msg == WM_SYSTIMER))
904 {
905 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
906 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
907 (TIMERPROC)0 );
908 if (msg != WM_LBUTTONDOWN) timerRunning = TRUE;
909 }
910
911 if (msg == WM_LBUTTONDOWN || SCROLL_lastHitTest != hittest)
912 {
913 SCROLL_DrawTopArrow(hdc,infoPtr,&rect,arrowSize,vertical,(hittest == SCROLL_trackHitTest));
914 SCROLL_lastHitTest = hittest;
915 }
916 if (hittest == SCROLL_trackHitTest && (msg == WM_LBUTTONDOWN || msg == WM_SYSTIMER))
917 SendMessageA(hwndOwner,vertical ? WM_VSCROLL:WM_HSCROLL,SB_LINEUP,hwndCtl);
918
919 break;
920
921 case SCROLL_TOP_RECT:
922 if (msg == WM_LBUTTONUP || msg == WM_CAPTURECHANGED)
923 KillSystemTimer(hwnd,SCROLL_TIMER);
924 else if (msg == WM_LBUTTONDOWN || (!timerRunning && msg == WM_SYSTIMER))
925 {
926 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
927 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
928 (TIMERPROC)0 );
929 if (msg != WM_LBUTTONDOWN) timerRunning = TRUE;
930 }
931
932 if (msg == WM_LBUTTONDOWN || SCROLL_lastHitTest != hittest)
933 {
934 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
935 thumbPos, infoPtr->flags, vertical,
936 (hittest == SCROLL_trackHitTest), FALSE );
937 SCROLL_lastHitTest = hittest;
938 }
939
940 if (hittest == SCROLL_trackHitTest && (msg == WM_LBUTTONDOWN || msg == WM_SYSTIMER))
941 SendMessageA(hwndOwner,vertical ? WM_VSCROLL:WM_HSCROLL,SB_PAGEUP,hwndCtl);
942
943 break;
944
945 case SCROLL_THUMB:
946 if (msg == WM_LBUTTONDOWN)
947 {
948 SCROLL_TrackingWin = hwnd;
949 SCROLL_TrackingBar = nBar;
950 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
951 SCROLL_TrackingVal = infoPtr->CurVal;
952 SCROLL_MovingThumb = TRUE;
953 thumbTrackSent = FALSE;
954 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
955 } else if (msg == WM_LBUTTONUP || msg == WM_CAPTURECHANGED)
956 {
957 UINT val;
958 INT oldPos = infoPtr->CurVal;
959
960 SCROLL_MovingThumb = FALSE;
961 SCROLL_TrackingWin = 0;
962 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
963 val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
964 trackThumbPos + lastMousePos - lastClickPos );
965
966 if (val != infoPtr->CurVal || thumbTrackSent)
967 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
968 MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl );
969
970 if (oldPos == infoPtr->CurVal)
971 {
972 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
973 &arrowSize, &thumbSize, &thumbPos );
974 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
975 thumbPos, infoPtr->flags, vertical,
976 FALSE, FALSE );
977 }
978
979 ReleaseDC(hwnd,hdc);
980 return res;
981 } else if (msg == WM_MOUSEMOVE)
982 {
983 UINT pos;
984
985 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
986 else
987 {
988 pt = SCROLL_ClipPos( &rect, pt );
989 pos = vertical ? pt.y:pt.x;
990 }
991 if (pos != lastMousePos)
992 {
993 lastMousePos = pos;
994 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
995 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
996 vertical,
997 SCROLL_TrackingPos );
998 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
999 arrowSize, thumbSize );
1000 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1001 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1002 hwndCtl );
1003 thumbTrackSent = TRUE;
1004 }
1005 }
1006 break;
1007
1008 case SCROLL_BOTTOM_RECT:
1009 if (msg == WM_LBUTTONUP || msg == WM_CAPTURECHANGED)
1010 KillSystemTimer(hwnd,SCROLL_TIMER);
1011 else if (msg == WM_LBUTTONDOWN || (!timerRunning && msg == WM_SYSTIMER))
1012 {
1013 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1014 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1015 (TIMERPROC)0 );
1016 if (msg != WM_LBUTTONDOWN) timerRunning = TRUE;
1017 }
1018
1019 if (msg == WM_LBUTTONDOWN || SCROLL_lastHitTest != hittest)
1020 {
1021 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1022 thumbPos, infoPtr->flags, vertical,
1023 FALSE, (hittest == SCROLL_trackHitTest) );
1024 SCROLL_lastHitTest = hittest;
1025 }
1026
1027 if (hittest == SCROLL_trackHitTest && (msg == WM_LBUTTONDOWN || msg == WM_SYSTIMER))
1028 SendMessageA(hwndOwner,vertical ? WM_VSCROLL:WM_HSCROLL,SB_PAGEDOWN,hwndCtl);
1029
1030 break;
1031
1032 case SCROLL_BOTTOM_ARROW:
1033 if (msg == WM_LBUTTONUP || msg == WM_CAPTURECHANGED)
1034 KillSystemTimer(hwnd,SCROLL_TIMER);
1035 else if (msg == WM_LBUTTONDOWN || (!timerRunning && msg == WM_SYSTIMER))
1036 {
1037 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1038 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1039 (TIMERPROC)0 );
1040 if (msg != WM_LBUTTONDOWN) timerRunning = TRUE;
1041 }
1042
1043 if (msg == WM_LBUTTONDOWN || SCROLL_lastHitTest != hittest)
1044 {
1045 SCROLL_DrawBottomArrow(hdc,infoPtr,&rect,arrowSize,vertical,(hittest == SCROLL_trackHitTest));
1046 SCROLL_lastHitTest = hittest;
1047 }
1048 if (hittest == SCROLL_trackHitTest && (msg == WM_LBUTTONDOWN || msg == WM_SYSTIMER))
1049 SendMessageA(hwndOwner,vertical ? WM_VSCROLL:WM_HSCROLL,SB_LINEDOWN,hwndCtl);
1050
1051 break;
1052 }
1053
1054 if (msg == WM_LBUTTONUP || msg == WM_CAPTURECHANGED)
1055 {
1056 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1057
1058 SendMessageA(hwndOwner,vertical ? WM_VSCROLL:WM_HSCROLL,SB_ENDSCROLL,hwndCtl);
1059 }
1060
1061 ReleaseDC( hwnd, hdc );
1062
1063 return res;
1064}
1065
1066/***********************************************************************
1067 * SCROLL_HandleKbdEvent
1068 *
1069 * Handle a keyboard event (only for SB_CTL scrollbars).
1070 */
1071LRESULT SCROLL_KeyDown(HWND hwnd,WPARAM wParam,LPARAM lParam)
1072{
1073 DWORD dwStyle = GetWindowLongA(hwnd,GWL_STYLE);
1074 UINT msg;
1075
1076 if (dwStyle & (SBS_SIZEBOX | SBS_SIZEGRIP)) return 0;
1077
1078 switch(wParam)
1079 {
1080 case VK_PRIOR: msg = SB_PAGEUP; break;
1081 case VK_NEXT: msg = SB_PAGEDOWN; break;
1082 case VK_HOME: msg = SB_TOP; break;
1083 case VK_END: msg = SB_BOTTOM; break;
1084 case VK_UP: msg = SB_LINEUP; break;
1085 case VK_DOWN: msg = SB_LINEDOWN; break;
1086 default:
1087 return 0;
1088 }
1089 SendMessageA( GetParent(hwnd),
1090 (dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
1091 msg, hwnd );
1092
1093 return 0;
1094}
1095
1096LRESULT SCROLL_Paint(HWND hwnd,WPARAM wParam,LPARAM lParam,INT nBar)
1097{
1098 PAINTSTRUCT ps;
1099 HDC hdc = wParam ? (HDC)wParam:BeginPaint( hwnd, &ps );
1100
1101 SCROLL_DrawScrollBar( hwnd, hdc, nBar, TRUE, TRUE );
1102 if (!wParam) EndPaint( hwnd, &ps );
1103
1104 return 0;
1105}
1106
1107LRESULT SCROLL_SetRange(HWND hwnd,WPARAM wParam,LPARAM lParam,INT nBar,BOOL redraw)
1108{
1109 SCROLLBAR_INFO *infoPtr = SCROLL_GetInfoPtr(hwnd,nBar);
1110 INT oldPos = infoPtr->CurVal;
1111
1112 SetScrollRange((nBar == SB_CTL) ? hwnd:SCROLL_GetFrameHandle(hwnd),nBar,wParam,lParam,redraw);
1113 return (oldPos != infoPtr->CurVal) ? infoPtr->CurVal:0;
1114}
1115
1116/* Window Procedures */
1117
1118/***********************************************************************
1119 * ScrollBarWndProc
1120 */
1121LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam,
1122 LPARAM lParam )
1123{
1124 switch(message)
1125 {
1126 case WM_NCCREATE:
1127 return SCROLL_NCCreate(hwnd,wParam,lParam);
1128
1129 case WM_CREATE:
1130 return SCROLL_Create(hwnd,wParam,lParam);
1131
1132 case WM_LBUTTONDOWN:
1133 case WM_LBUTTONUP:
1134 case WM_CAPTURECHANGED:
1135 case WM_MOUSEMOVE:
1136 case WM_SETCURSOR:
1137 case WM_SYSTIMER:
1138 case WM_SETFOCUS:
1139 case WM_KILLFOCUS:
1140 return SCROLL_HandleScrollEvent(hwnd,wParam,lParam,SB_CTL,message);
1141
1142 case WM_KEYDOWN:
1143 return SCROLL_KeyDown(hwnd,wParam,lParam);
1144
1145 case WM_ERASEBKGND:
1146 return 1;
1147
1148 case WM_GETDLGCODE:
1149 return DLGC_WANTARROWS; /* Windows returns this value */
1150
1151 case WM_PAINT:
1152 return SCROLL_Paint(hwnd,wParam,lParam,SB_CTL);
1153
1154 case SBM_SETPOS:
1155 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1156
1157 case SBM_GETPOS:
1158 return GetScrollPos( hwnd, SB_CTL );
1159
1160 case SBM_SETRANGE:
1161 return SCROLL_SetRange(hwnd,wParam,lParam,SB_CTL,FALSE);
1162
1163 case SBM_GETRANGE:
1164 GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
1165 return 0;
1166
1167 case SBM_ENABLE_ARROWS:
1168 return EnableScrollBar( hwnd, SB_CTL, wParam );
1169
1170 case SBM_SETRANGEREDRAW:
1171 return SCROLL_SetRange(hwnd,wParam,lParam,SB_CTL,TRUE);
1172
1173 case SBM_SETSCROLLINFO:
1174 return SetScrollInfo(hwnd,SB_CTL,(SCROLLINFO*)lParam,wParam);
1175
1176 case SBM_GETSCROLLINFO:
1177 return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
1178
1179 case 0x00e5:
1180 case 0x00e7:
1181 case 0x00e8:
1182 case 0x00eb:
1183 case 0x00ec:
1184 case 0x00ed:
1185 case 0x00ee:
1186 case 0x00ef:
1187 //ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1188 // message, wParam, lParam );
1189 break;
1190
1191 default:
1192 return DefWindowProcA( hwnd, message, wParam, lParam );
1193 }
1194
1195 return 0;
1196}
1197
1198/* frame handlers */
1199
1200VOID SCROLL_SubclassScrollBars(HWND hwndHorz,HWND hwndVert)
1201{
1202 if (hwndHorz) SetWindowLongA(hwndHorz,GWL_WNDPROC,(ULONG)HorzScrollBarWndProc);
1203 if (hwndVert) SetWindowLongA(hwndVert,GWL_WNDPROC,(ULONG)VertScrollBarWndProc);
1204}
1205
1206LRESULT WINAPI HorzScrollBarWndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam )
1207{
1208 switch (message)
1209 {
1210 case WM_LBUTTONDOWN:
1211 case WM_LBUTTONUP:
1212 case WM_CAPTURECHANGED:
1213 case WM_MOUSEMOVE:
1214 case WM_SETCURSOR:
1215 case WM_SYSTIMER:
1216 case WM_SETFOCUS:
1217 case WM_KILLFOCUS:
1218 return SCROLL_HandleScrollEvent(hwnd,wParam,lParam,SB_HORZ,message);
1219
1220 case WM_ERASEBKGND:
1221 return 1;
1222
1223 case WM_GETDLGCODE:
1224 return DLGC_WANTARROWS; /* Windows returns this value */
1225
1226 case WM_PAINT:
1227 return SCROLL_Paint(hwnd,wParam,lParam,SB_HORZ);
1228
1229 case SBM_SETPOS:
1230 return SetScrollPos(SCROLL_GetFrameHandle(hwnd),SB_HORZ,wParam,(BOOL)lParam);
1231
1232 case SBM_GETPOS:
1233 return GetScrollPos(SCROLL_GetFrameHandle(hwnd),SB_HORZ);
1234
1235 case SBM_SETRANGE:
1236 return SCROLL_SetRange(hwnd,wParam,lParam,SB_HORZ,FALSE);
1237
1238 case SBM_GETRANGE:
1239 GetScrollRange(SCROLL_GetFrameHandle(hwnd),SB_HORZ,(LPINT)wParam,(LPINT)lParam);
1240 return 0;
1241
1242 case SBM_ENABLE_ARROWS:
1243 return EnableScrollBar(SCROLL_GetFrameHandle(hwnd),SB_HORZ,wParam);
1244
1245 case SBM_SETRANGEREDRAW:
1246 return SCROLL_SetRange(hwnd,wParam,lParam,SB_HORZ,TRUE);
1247
1248 case SBM_SETSCROLLINFO:
1249 return SetScrollInfo(SCROLL_GetFrameHandle(hwnd),SB_HORZ,(SCROLLINFO*)lParam,wParam);
1250
1251 case SBM_GETSCROLLINFO:
1252 return GetScrollInfo(SCROLL_GetFrameHandle(hwnd),SB_HORZ,(SCROLLINFO*)lParam);
1253
1254 default:
1255 return DefWindowProcA(hwnd,message,wParam,lParam);
1256 }
1257
1258 return 0;
1259}
1260
1261LRESULT WINAPI VertScrollBarWndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam )
1262{
1263 switch (message)
1264 {
1265 case WM_LBUTTONDOWN:
1266 case WM_LBUTTONUP:
1267 case WM_CAPTURECHANGED:
1268 case WM_MOUSEMOVE:
1269 case WM_SETCURSOR:
1270 case WM_SYSTIMER:
1271 case WM_SETFOCUS:
1272 case WM_KILLFOCUS:
1273 return SCROLL_HandleScrollEvent(hwnd,wParam,lParam,SB_VERT,message);
1274
1275 case WM_ERASEBKGND:
1276 return 1;
1277
1278 case WM_GETDLGCODE:
1279 return DLGC_WANTARROWS; /* Windows returns this value */
1280
1281 case WM_PAINT:
1282 return SCROLL_Paint(hwnd,wParam,lParam,SB_VERT);
1283
1284 case SBM_SETPOS:
1285 return SetScrollPos(SCROLL_GetFrameHandle(hwnd),SB_VERT,wParam,(BOOL)lParam);
1286
1287 case SBM_GETPOS:
1288 return GetScrollPos(SCROLL_GetFrameHandle(hwnd),SB_VERT);
1289
1290 case SBM_SETRANGE:
1291 return SCROLL_SetRange(hwnd,wParam,lParam,SB_VERT,FALSE);
1292
1293 case SBM_GETRANGE:
1294 GetScrollRange(SCROLL_GetFrameHandle(hwnd),SB_VERT,(LPINT)wParam,(LPINT)lParam);
1295 return 0;
1296
1297 case SBM_ENABLE_ARROWS:
1298 return EnableScrollBar(SCROLL_GetFrameHandle(hwnd),SB_VERT,wParam);
1299
1300 case SBM_SETRANGEREDRAW:
1301 return SCROLL_SetRange(hwnd,wParam,lParam,SB_VERT,TRUE);
1302
1303 case SBM_SETSCROLLINFO:
1304 return SetScrollInfo(SCROLL_GetFrameHandle(hwnd),SB_VERT,(SCROLLINFO*)lParam,wParam);
1305
1306 case SBM_GETSCROLLINFO:
1307 return GetScrollInfo(SCROLL_GetFrameHandle(hwnd),SB_VERT,(SCROLLINFO*)lParam);
1308
1309 default:
1310 return DefWindowProcA(hwnd,message,wParam,lParam);
1311 }
1312
1313 return 0;
1314}
1315
1316/* Scrollbar API */
1317
1318/*************************************************************************
1319 * SetScrollInfo (USER32.501)
1320 * SetScrollInfo32 can be used to set the position, upper bound,
1321 * lower bound, and page size of a scrollbar control.
1322 *
1323 * RETURNS
1324 * Scrollbar position
1325 *
1326 * NOTE
1327 * For 100 lines of text to be displayed in a window of 25 lines,
1328 * one would for instance use info->nMin=0, info->nMax=75
1329 * (corresponding to the 76 different positions of the window on
1330 * the text), and info->nPage=25.
1331 */
1332INT WINAPI SetScrollInfo(HWND hwnd,INT nBar,const SCROLLINFO *info,BOOL bRedraw)
1333{
1334 /* Update the scrollbar state and set action flags according to
1335 * what has to be done graphics wise. */
1336
1337 SCROLLBAR_INFO *infoPtr;
1338 UINT new_flags;
1339 INT action = 0;
1340 HWND hwndScroll = SCROLL_GetScrollHandle(hwnd,nBar);
1341
1342 dprintf(("USER32: SetScrollInfo"));
1343
1344 if (!hwndScroll) return 0;
1345 if (!(infoPtr = SCROLL_GetInfoPtr(hwndScroll,nBar))) return 0;
1346 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1347 if ((info->cbSize != sizeof(*info)) &&
1348 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1349
1350 /* Set the page size */
1351 if (info->fMask & SIF_PAGE)
1352 {
1353 if( infoPtr->Page != info->nPage )
1354 {
1355 infoPtr->Page = info->nPage;
1356 action |= SA_SSI_REPAINT_INTERIOR;
1357 }
1358 }
1359
1360 /* Set the scroll pos */
1361 if (info->fMask & SIF_POS)
1362 {
1363 //dsprintf(scroll, " pos=%d", info->nPos );
1364 if( infoPtr->CurVal != info->nPos )
1365 {
1366 infoPtr->CurVal = info->nPos;
1367 action |= SA_SSI_MOVE_THUMB;
1368 }
1369 }
1370
1371 /* Set the scroll range */
1372 if (info->fMask & SIF_RANGE)
1373 {
1374 /* Invalid range -> range is set to (0,0) */
1375 if ((info->nMin > info->nMax) ||
1376 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1377 {
1378 infoPtr->MinVal = 0;
1379 infoPtr->MaxVal = 0;
1380 }
1381 else
1382 {
1383 if( infoPtr->MinVal != info->nMin ||
1384 infoPtr->MaxVal != info->nMax )
1385 {
1386 action |= SA_SSI_REPAINT_INTERIOR;
1387 infoPtr->MinVal = info->nMin;
1388 infoPtr->MaxVal = info->nMax;
1389 }
1390 }
1391 }
1392
1393 /* Make sure the page size is valid */
1394
1395 if (infoPtr->Page < 0) infoPtr->Page = 0;
1396 else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 )
1397 infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1;
1398
1399 /* Make sure the pos is inside the range */
1400
1401 if (infoPtr->CurVal < infoPtr->MinVal)
1402 infoPtr->CurVal = infoPtr->MinVal;
1403 else if (infoPtr->CurVal > infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1404 infoPtr->CurVal = infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 );
1405
1406 //TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1407 // infoPtr->Page, infoPtr->CurVal,
1408 // infoPtr->MinVal, infoPtr->MaxVal );
1409
1410 /* Check if the scrollbar should be hidden or disabled */
1411 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1412 {
1413 new_flags = infoPtr->flags;
1414 if (infoPtr->MinVal >= infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1415 {
1416 /* Hide or disable scroll-bar */
1417 if (info->fMask & SIF_DISABLENOSCROLL)
1418 {
1419 new_flags = ESB_DISABLE_BOTH;
1420 action |= SA_SSI_REFRESH;
1421 } else if (nBar != SB_CTL)
1422 {
1423 action = SA_SSI_HIDE;
1424 goto done;
1425 }
1426 } else /* Show and enable scroll-bar */
1427 {
1428 new_flags = 0;
1429 if (nBar != SB_CTL) action |= SA_SSI_SHOW;
1430 if (infoPtr->flags) action |= SA_SSI_REFRESH;
1431 }
1432
1433 if (infoPtr->flags != new_flags) /* check arrow flags */
1434 {
1435 infoPtr->flags = new_flags;
1436 action |= SA_SSI_REPAINT_ARROWS;
1437 }
1438 }
1439
1440done:
1441 /* Update scrollbar */
1442
1443 if( action & SA_SSI_HIDE )
1444 ShowScrollBar(hwnd,nBar,FALSE);
1445 else
1446 {
1447 if(action & SA_SSI_SHOW)
1448 ShowScrollBar(hwnd,nBar,TRUE);
1449
1450 if (bRedraw)
1451 {
1452 if (action & SA_SSI_REFRESH)
1453 SCROLL_RefreshScrollBar(hwndScroll,nBar,TRUE,TRUE);
1454 else
1455 {
1456 if (action & (SA_SSI_REPAINT_INTERIOR | SA_SSI_MOVE_THUMB))
1457 SCROLL_RefreshScrollBar(hwndScroll,nBar,FALSE,TRUE);
1458 if (action & SA_SSI_REPAINT_ARROWS)
1459 SCROLL_RefreshScrollBar(hwndScroll,nBar,TRUE,FALSE);
1460 }
1461 }
1462 }
1463
1464 /* Return current position */
1465
1466 return infoPtr->CurVal;
1467}
1468/*************************************************************************
1469 * GetScrollInfo (USER32.284)
1470 * GetScrollInfo32 can be used to retrieve the position, upper bound,
1471 * lower bound, and page size of a scrollbar control.
1472 *
1473 * RETURNS STD
1474 */
1475BOOL WINAPI GetScrollInfo(
1476 HWND hwnd /* [I] Handle of window */ ,
1477 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1478 LPSCROLLINFO info /* [IO] (info.fMask [I] specifies which values are to retrieve) */)
1479{
1480 SCROLLBAR_INFO *infoPtr;
1481 HWND hwndScroll;
1482
1483 dprintf(("USER32: GetScrollInfo"));
1484
1485 hwndScroll = SCROLL_GetScrollHandle(hwnd,nBar);
1486 if (!hwndScroll || !(infoPtr = SCROLL_GetInfoPtr(hwndScroll,nBar))) return FALSE;
1487 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1488 if ((info->cbSize != sizeof(*info)) &&
1489 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1490
1491 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page;
1492 if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal;
1493 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1494 info->nTrackPos = (SCROLL_MovingThumb && SCROLL_TrackingWin == hwndScroll && SCROLL_TrackingBar == nBar) ? SCROLL_TrackingVal:infoPtr->CurVal;
1495
1496 if (info->fMask & SIF_RANGE)
1497 {
1498 info->nMin = infoPtr->MinVal;
1499 info->nMax = infoPtr->MaxVal;
1500 }
1501 return (info->fMask & SIF_ALL) != 0;
1502}
1503/*************************************************************************
1504 * SetScrollPos (USER32.502)
1505 *
1506 * RETURNS
1507 * Success: Scrollbar position
1508 * Failure: 0
1509 *
1510 * REMARKS
1511 * Note the ambiguity when 0 is returned. Use GetLastError
1512 * to make sure there was an error (and to know which one).
1513 */
1514INT WINAPI SetScrollPos(
1515 HWND hwnd /* [I] Handle of window whose scrollbar will be affected */,
1516 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1517 INT nPos /* [I] New value */,
1518 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */ )
1519{
1520 SCROLLINFO info;
1521 SCROLLBAR_INFO *infoPtr;
1522 INT oldPos;
1523
1524 dprintf(("SetScrollPos %x %d %d %d", hwnd, nBar, nPos, bRedraw));
1525 if (!(infoPtr = SCROLL_GetInfoPtr(SCROLL_GetScrollHandle(hwnd,nBar),nBar))) return 0;
1526 oldPos = infoPtr->CurVal;
1527 info.cbSize = sizeof(info);
1528 info.nPos = nPos;
1529 info.fMask = SIF_POS;
1530 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1531 return oldPos;
1532}
1533/*************************************************************************
1534 * GetScrollPos (USER32.285)
1535 *
1536 * RETURNS
1537 * Success: Current position
1538 * Failure: 0
1539 *
1540 * REMARKS
1541 * Note the ambiguity when 0 is returned. Use GetLastError
1542 * to make sure there was an error (and to know which one).
1543 */
1544INT WINAPI GetScrollPos(
1545 HWND hwnd, /* [I] Handle of window */
1546 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */)
1547{
1548 SCROLLBAR_INFO *infoPtr;
1549
1550 dprintf(("GetScrollPos %x %d", hwnd, nBar));
1551
1552 infoPtr = SCROLL_GetInfoPtr(SCROLL_GetScrollHandle(hwnd,nBar),nBar);
1553 if (!infoPtr) return 0;
1554
1555 return infoPtr->CurVal;
1556}
1557
1558/*************************************************************************
1559 * SetScrollRange (USER32.503)
1560 *
1561 * RETURNS STD
1562 */
1563BOOL WINAPI SetScrollRange(
1564 HWND hwnd, /* [I] Handle of window whose scrollbar will be affected */
1565 INT nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
1566 INT MinVal, /* [I] New minimum value */
1567 INT MaxVal, /* [I] New maximum value */
1568 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
1569{
1570 SCROLLINFO info;
1571
1572 dprintf(("SetScrollRange %x %x %d %d %d", hwnd, nBar, MinVal, MaxVal, bRedraw));
1573 info.cbSize = sizeof(info);
1574 info.nMin = MinVal;
1575 info.nMax = MaxVal;
1576 info.fMask = SIF_RANGE;
1577 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1578 return TRUE;
1579}
1580
1581/*************************************************************************
1582 * GetScrollRange (USER32.286)
1583 *
1584 * RETURNS STD
1585 */
1586BOOL WINAPI GetScrollRange(
1587 HWND hwnd, /* [I] Handle of window */
1588 INT nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
1589 LPINT lpMin, /* [O] Where to store minimum value */
1590 LPINT lpMax /* [O] Where to store maximum value */)
1591{
1592 SCROLLBAR_INFO *infoPtr;
1593
1594 infoPtr = SCROLL_GetInfoPtr(SCROLL_GetScrollHandle(hwnd,nBar),nBar);
1595 if (!infoPtr)
1596 {
1597 if (lpMin) lpMin = 0;
1598 if (lpMax) lpMax = 0;
1599 return FALSE;
1600 }
1601 if (lpMin) *lpMin = infoPtr->MinVal;
1602 if (lpMax) *lpMax = infoPtr->MaxVal;
1603 return TRUE;
1604}
1605
1606/*************************************************************************
1607 * ShowScrollBar (USER32.532)
1608 *
1609 * RETURNS STD
1610 */
1611BOOL WINAPI ShowScrollBar(
1612 HWND hwnd, /* [I] Handle of window whose scrollbar(s) will be affected */
1613 INT nBar, /* [I] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1614 BOOL fShow /* [I] TRUE = show, FALSE = hide */)
1615{
1616 dprintf(("ShowScrollBar %04x %d %d\n", hwnd, nBar, fShow));
1617
1618 if (nBar == SB_CTL)
1619 {
1620 ShowWindow(hwnd,fShow ? SW_SHOW:SW_HIDE);
1621
1622 return TRUE;
1623 } else
1624 {
1625 Win32BaseWindow *window = Win32BaseWindow::GetWindowFromHandle(hwnd);
1626 BOOL createHorz = FALSE,createVert = FALSE;
1627
1628 if (!window)
1629 {
1630 dprintf(("ShowScrollBar window not found!"));
1631 SetLastError(ERROR_INVALID_WINDOW_HANDLE);
1632 return 0;
1633 }
1634
1635 return window->showScrollBars(nBar == SB_HORZ || nBar == SB_BOTH,nBar == SB_VERT || nBar == SB_BOTH,fShow);
1636 }
1637
1638 return TRUE;
1639}
1640
1641/*************************************************************************
1642 * EnableScrollBar (USER32.171)
1643 */
1644BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags)
1645{
1646 Win32BaseWindow *window;
1647 SCROLLBAR_INFO *infoPtr;
1648
1649 dprintf(("EnableScrollBar %04x %d %d\n", hwnd, nBar, flags));
1650
1651 if (nBar == SB_CTL)
1652 {
1653 if (!(infoPtr = SCROLL_GetInfoPtr(hwnd,nBar))) return FALSE;
1654
1655 if (infoPtr->flags != flags)
1656 {
1657 infoPtr->flags = flags;
1658 SCROLL_RefreshScrollBar(hwnd,nBar,TRUE,TRUE);
1659 }
1660
1661 return TRUE;
1662 } else
1663 {
1664 Win32BaseWindow *window = Win32BaseWindow::GetWindowFromHandle(hwnd);
1665 if(!window)
1666 {
1667 dprintf(("EnableScrollBar window not found!"));
1668 SetLastError(ERROR_INVALID_WINDOW_HANDLE);
1669 return FALSE;
1670 }
1671
1672 if(window->getStyle() & (WS_HSCROLL | WS_VSCROLL))
1673 {
1674 BOOL rc = FALSE;
1675
1676 if (nBar == SB_VERT || nBar == SB_BOTH)
1677 {
1678 HWND hwndScroll = Win32BaseWindow::OS2ToWin32Handle(window->getVertScrollHandle());
1679
1680 infoPtr = SCROLL_GetInfoPtr(hwndScroll,SB_VERT);
1681 if (infoPtr)
1682 {
1683 if (infoPtr->flags != flags)
1684 {
1685 infoPtr->flags = flags;
1686 SCROLL_RefreshScrollBar(hwndScroll,nBar,TRUE,TRUE);
1687 }
1688
1689 rc = TRUE;
1690 }
1691 }
1692 if (nBar == SB_HORZ || (rc && nBar == SB_BOTH))
1693 {
1694 HWND hwndScroll = Win32BaseWindow::OS2ToWin32Handle(window->getVertScrollHandle());
1695
1696 infoPtr = SCROLL_GetInfoPtr(hwndScroll,SB_VERT);
1697 if (infoPtr)
1698 {
1699 if (infoPtr->flags != flags)
1700 {
1701 infoPtr->flags = flags;
1702 SCROLL_RefreshScrollBar(hwndScroll,nBar,TRUE,TRUE);
1703 }
1704
1705 rc = TRUE;
1706 }
1707 }
1708
1709 return rc;
1710 }
1711 }
1712
1713 return TRUE;
1714}
1715
1716//CB: not listed in user32.exp -> don't know the id!
1717
1718BOOL WINAPI GetScrollBarInfo(HWND hwnd,LONG idObject,PSCROLLBARINFO psbi)
1719{
1720 if (!psbi || psbi->cbSize != sizeof(SCROLLBARINFO))
1721 {
1722 SetLastError(ERROR_INVALID_PARAMETER);
1723
1724 return FALSE;
1725 }
1726
1727 HWND hwndScroll;
1728 INT nBar,arrowSize;
1729
1730 switch (idObject)
1731 {
1732 case OBJID_CLIENT:
1733 nBar = SB_CTL;
1734 hwndScroll = hwnd;
1735 break;
1736
1737 case OBJID_HSCROLL:
1738 nBar = SB_HORZ;
1739 hwndScroll = SCROLL_GetScrollHandle(hwnd,SB_HORZ);
1740 break;
1741
1742 case OBJID_VSCROLL:
1743 nBar = SB_VERT;
1744 hwndScroll = SCROLL_GetScrollHandle(hwnd,SB_VERT);
1745 break;
1746
1747 default:
1748 return FALSE;
1749 }
1750
1751 if (!hwndScroll) return FALSE;
1752
1753 SCROLL_GetScrollBarRect(hwndScroll,nBar,&psbi->rcScrollBar,&arrowSize,&psbi->dxyLineButton,&psbi->xyThumbTop);
1754 psbi->xyThumbBottom = psbi->xyThumbTop+psbi->dxyLineButton;
1755 psbi->bogus = 0; //CB: undocumented!
1756 psbi->rgstate[0] = IsWindowVisible(hwndScroll) ? STATE_SYSTEM_INVISIBLE:0;
1757 psbi->rgstate[1] = psbi->rgstate[2] = psbi->rgstate[3] = psbi->rgstate[4] = psbi->rgstate[5] = psbi->rgstate[0]; //CB: todo
1758
1759 return TRUE;
1760}
1761//******************************************************************************
1762//******************************************************************************
1763BOOL SCROLLBAR_Register()
1764{
1765 WNDCLASSA wndClass;
1766
1767//SvL: Don't check this now
1768// if (GlobalFindAtomA(SCROLLBARCLASSNAME)) return FALSE;
1769
1770 ZeroMemory(&wndClass,sizeof(WNDCLASSA));
1771 wndClass.style = CS_GLOBALCLASS | CS_HREDRAW | CS_VREDRAW | CS_PARENTDC;
1772 wndClass.lpfnWndProc = (WNDPROC)ScrollBarWndProc;
1773 wndClass.cbClsExtra = 0;
1774 wndClass.cbWndExtra = sizeof(SCROLLBAR_INFO);
1775 wndClass.hCursor = LoadCursorA(0,IDC_ARROWA);
1776 wndClass.hbrBackground = (HBRUSH)0;
1777 wndClass.lpszClassName = SCROLLBARCLASSNAME;
1778
1779 return RegisterClassA(&wndClass);
1780}
1781//******************************************************************************
1782//******************************************************************************
1783BOOL SCROLLBAR_Unregister()
1784{
1785 if (GlobalFindAtomA(SCROLLBARCLASSNAME))
1786 return UnregisterClassA(SCROLLBARCLASSNAME,(HINSTANCE)NULL);
1787 else return FALSE;
1788}
1789//******************************************************************************
1790//******************************************************************************
1791
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