source: trunk/src/user32/scroll.cpp@ 1693

Last change on this file since 1693 was 1693, checked in by cbratschi, 26 years ago

ShowScrollBar fix
File size: 53.7 KB
Line 
1/* $Id: scroll.cpp,v 1.20 1999-11-10 17:11:30 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: 990923
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 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 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 INT lastClickPos; /* Position in the scroll-bar of the last button-down event. */
704 static INT lastMousePos; /* Position in the scroll-bar of the last mouse event. */
705 static BOOL timerRunning;
706
707 enum SCROLL_HITTEST hittest;
708 HWND hwndOwner, hwndCtl;
709 BOOL vertical;
710 INT arrowSize, thumbSize, thumbPos;
711 RECT rect;
712 HDC hdc;
713 POINT pt;
714 LRESULT res = (msg == WM_MOUSEMOVE) ? 1:0;
715
716 SCROLLBAR_INFO *infoPtr = SCROLL_GetInfoPtr(hwnd,nBar);
717 if (!infoPtr) return res;
718
719 if (nBar == SB_CTL)
720 {
721 DWORD dwStyle = GetWindowLongA(hwnd,GWL_STYLE);
722
723 if ((dwStyle & (SBS_SIZEBOX | SBS_SIZEGRIP)))
724 {
725 if (!(dwStyle & SBS_SIZEGRIP)) return res;
726
727 if (msg == WM_MOUSEMOVE)
728 {
729 RECT rect;
730
731 SCROLL_GetSizeBox(hwnd,dwStyle,&rect);
732 pt.x = (SHORT)LOWORD(lParam);
733 pt.y = (SHORT)HIWORD(lParam);
734
735 if (PtInRect(&rect,pt))
736 {
737 SetCursor(LoadCursorA(0,IDC_SIZENWSEA));
738 return 0;
739 }
740 } else if (msg == WM_LBUTTONDOWN)
741 {
742 if (dwStyle & SBS_SIZEGRIP)
743 {
744 RECT rect;
745
746 pt.x = (SHORT)LOWORD(lParam);
747 pt.y = (SHORT)HIWORD(lParam);
748 SCROLL_GetSizeBox(hwnd,dwStyle,&rect);
749 if (PtInRect(&rect,pt))
750 {
751 HWND hwndFrame;
752
753 Win32BaseWindow *win32wnd = Win32BaseWindow::GetWindowFromHandle(hwnd);
754 if (!win32wnd) return res;
755 hwndFrame = OSLibWinQueryWindow(win32wnd->getOS2WindowHandle(),QWOS_OWNER);
756 win32wnd = Win32BaseWindow::GetWindowFromOS2FrameHandle(hwndFrame);
757 if (!win32wnd) return res;
758 FrameTrackFrame(win32wnd,dwStyle & SBS_SIZEBOXTOPLEFTALIGN);
759 }
760 }
761 }
762
763 return res;
764 }
765 }
766
767 if (!SCROLL_Scrolling && msg != WM_LBUTTONDOWN) return res;
768
769 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
770 &arrowSize, &thumbSize, &thumbPos );
771 if (nBar == SB_CTL) hwndOwner = GetParent(hwnd); else
772 {
773 Win32BaseWindow *win32wnd;
774 HWND hwndFrame;
775
776 win32wnd = Win32BaseWindow::GetWindowFromHandle(hwnd);
777 if (!win32wnd) return res;
778 hwndFrame = OSLibWinQueryWindow(win32wnd->getOS2WindowHandle(),QWOS_OWNER);
779 win32wnd = Win32BaseWindow::GetWindowFromOS2FrameHandle(hwndFrame);
780 if (!win32wnd) return res;
781 hwndOwner = win32wnd->getWindowHandle();
782 }
783
784 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
785
786 switch (msg)
787 {
788 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
789 pt.x = (SHORT)LOWORD(lParam);
790 pt.y = (SHORT)HIWORD(lParam);
791 SCROLL_trackVertical = vertical;
792 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
793 if (SCROLL_trackHitTest == SCROLL_NOWHERE) return res;
794 SCROLL_Scrolling = TRUE;
795 timerRunning = FALSE;
796 if (SCROLL_FocusWin == hwnd && SCROLL_Highlighted)
797 {
798 hdc = GetDCEx(hwnd,0,DCX_CACHE);
799 SCROLL_DrawScrollBar(hwnd,hdc,nBar,FALSE,TRUE);
800 ReleaseDC(hwnd,hdc);
801 }
802 lastClickPos = vertical ? pt.y:pt.x;
803 lastMousePos = lastClickPos;
804 trackThumbPos = thumbPos;
805 prevPt = pt;
806 SetCapture( hwnd );
807 if (nBar == SB_CTL) SetFocus( hwnd );
808 break;
809
810 case WM_MOUSEMOVE:
811 pt.x = (SHORT)LOWORD(lParam);
812 pt.y = (SHORT)HIWORD(lParam);
813 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
814 prevPt = pt;
815 break;
816
817 case WM_LBUTTONUP:
818 if (SCROLL_Scrolling)
819 {
820 pt.x = (SHORT)LOWORD(lParam);
821 pt.y = (SHORT)HIWORD(lParam);
822 hittest = SCROLL_NOWHERE;
823 ReleaseCapture();
824 SCROLL_Scrolling = FALSE;
825 } else return res;
826 break;
827
828 case WM_CAPTURECHANGED:
829 if (SCROLL_Scrolling)
830 {
831 hittest = SCROLL_NOWHERE;
832 SCROLL_Scrolling = FALSE;
833 } else return res;
834 break;
835
836 case WM_SETFOCUS:
837 if (nBar == SB_CTL)
838 {
839 SCROLL_FocusWin = hwnd;
840 SCROLL_HasFocus = TRUE;
841 SCROLL_Highlighted = FALSE;
842 SetSystemTimer(hwnd,BLINK_TIMER,SCROLL_BLINK_DELAY,(TIMERPROC)0);
843 }
844 return res;
845
846 case WM_KILLFOCUS:
847 if (SCROLL_FocusWin == hwnd)
848 {
849 SCROLL_FocusWin = 0;
850 SCROLL_HasFocus = FALSE;
851 if (SCROLL_Highlighted)
852 {
853 SCROLL_Highlighted = FALSE;
854 hdc = GetDCEx(hwnd,0,DCX_CACHE);
855 SCROLL_DrawScrollBar(hwnd,hdc,nBar,FALSE,TRUE);
856 ReleaseDC(hwnd,hdc);
857 }
858 KillSystemTimer(hwnd,BLINK_TIMER);
859 }
860 return res;
861
862 case WM_SYSTIMER:
863 if (wParam == SCROLL_TIMER)
864 {
865 pt = prevPt;
866 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
867 break;
868 } else if (wParam == BLINK_TIMER)
869 {
870 SCROLL_Highlighted = ~SCROLL_Highlighted;
871 if (!SCROLL_Scrolling)
872 {
873 hdc = GetDCEx(hwnd,0,DCX_CACHE);
874 SCROLL_DrawScrollBar(hwnd,hdc,nBar,FALSE,TRUE);
875 ReleaseDC(hwnd,hdc);
876 }
877 return res;
878 } else return res;
879
880 default:
881 return res; /* Should never happen */
882 }
883
884 hdc = GetDCEx(hwnd,0,DCX_CACHE | ((nBar == SB_CTL) ? 0:DCX_WINDOW));
885
886 switch(SCROLL_trackHitTest)
887 {
888 case SCROLL_NOWHERE: /* No tracking in progress */
889 break;
890
891 case SCROLL_TOP_ARROW:
892 if (msg == WM_LBUTTONUP || msg == WM_CAPTURECHANGED)
893 KillSystemTimer(hwnd,SCROLL_TIMER);
894 else if (msg == WM_LBUTTONDOWN || (!timerRunning && msg == WM_SYSTIMER))
895 {
896 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
897 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
898 (TIMERPROC)0 );
899 if (msg != WM_LBUTTONDOWN) timerRunning = TRUE;
900 }
901
902 if (msg == WM_LBUTTONDOWN || SCROLL_lastHitTest != hittest)
903 {
904 SCROLL_DrawTopArrow(hdc,infoPtr,&rect,arrowSize,vertical,(hittest == SCROLL_trackHitTest));
905 SCROLL_lastHitTest = hittest;
906 }
907 if (hittest == SCROLL_trackHitTest && (msg == WM_LBUTTONDOWN || msg == WM_SYSTIMER))
908 SendMessageA(hwndOwner,vertical ? WM_VSCROLL:WM_HSCROLL,SB_LINEUP,hwndCtl);
909
910 break;
911
912 case SCROLL_TOP_RECT:
913 if (msg == WM_LBUTTONUP || msg == WM_CAPTURECHANGED)
914 KillSystemTimer(hwnd,SCROLL_TIMER);
915 else if (msg == WM_LBUTTONDOWN || (!timerRunning && msg == WM_SYSTIMER))
916 {
917 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
918 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
919 (TIMERPROC)0 );
920 if (msg != WM_LBUTTONDOWN) timerRunning = TRUE;
921 }
922
923 if (msg == WM_LBUTTONDOWN || SCROLL_lastHitTest != hittest)
924 {
925 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
926 thumbPos, infoPtr->flags, vertical,
927 (hittest == SCROLL_trackHitTest), FALSE );
928 SCROLL_lastHitTest = hittest;
929 }
930
931 if (hittest == SCROLL_trackHitTest && (msg == WM_LBUTTONDOWN || msg == WM_SYSTIMER))
932 SendMessageA(hwndOwner,vertical ? WM_VSCROLL:WM_HSCROLL,SB_PAGEUP,hwndCtl);
933
934 break;
935
936 case SCROLL_THUMB:
937 if (msg == WM_LBUTTONDOWN)
938 {
939 SCROLL_TrackingWin = hwnd;
940 SCROLL_TrackingBar = nBar;
941 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
942 SCROLL_TrackingVal = infoPtr->CurVal;
943 SCROLL_MovingThumb = TRUE;
944 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
945 } else if (msg == WM_LBUTTONUP || msg == WM_CAPTURECHANGED)
946 {
947 UINT val;
948 INT oldPos = infoPtr->CurVal;
949
950 SCROLL_MovingThumb = FALSE;
951 SCROLL_TrackingWin = 0;
952 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
953 val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
954 trackThumbPos + lastMousePos - lastClickPos );
955
956 if (val != infoPtr->CurVal)
957 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
958 MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl );
959
960 if (oldPos == infoPtr->CurVal)
961 {
962 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
963 &arrowSize, &thumbSize, &thumbPos );
964 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
965 thumbPos, infoPtr->flags, vertical,
966 FALSE, FALSE );
967 }
968
969 ReleaseDC(hwnd,hdc);
970 return res;
971 } else if (msg == WM_MOUSEMOVE)
972 {
973 UINT pos;
974
975 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
976 else
977 {
978 pt = SCROLL_ClipPos( &rect, pt );
979 pos = vertical ? pt.y:pt.x;
980 }
981 if (pos != lastMousePos)
982 {
983 lastMousePos = pos;
984 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
985 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
986 vertical,
987 SCROLL_TrackingPos );
988 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
989 arrowSize, thumbSize );
990 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
991 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
992 hwndCtl );
993 }
994 }
995 break;
996
997 case SCROLL_BOTTOM_RECT:
998 if (msg == WM_LBUTTONUP || msg == WM_CAPTURECHANGED)
999 KillSystemTimer(hwnd,SCROLL_TIMER);
1000 else if (msg == WM_LBUTTONDOWN || (!timerRunning && msg == WM_SYSTIMER))
1001 {
1002 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1003 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1004 (TIMERPROC)0 );
1005 if (msg != WM_LBUTTONDOWN) timerRunning = TRUE;
1006 }
1007
1008 if (msg == WM_LBUTTONDOWN || SCROLL_lastHitTest != hittest)
1009 {
1010 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1011 thumbPos, infoPtr->flags, vertical,
1012 FALSE, (hittest == SCROLL_trackHitTest) );
1013 SCROLL_lastHitTest = hittest;
1014 }
1015
1016 if (hittest == SCROLL_trackHitTest && (msg == WM_LBUTTONDOWN || msg == WM_SYSTIMER))
1017 SendMessageA(hwndOwner,vertical ? WM_VSCROLL:WM_HSCROLL,SB_PAGEDOWN,hwndCtl);
1018
1019 break;
1020
1021 case SCROLL_BOTTOM_ARROW:
1022 if (msg == WM_LBUTTONUP || msg == WM_CAPTURECHANGED)
1023 KillSystemTimer(hwnd,SCROLL_TIMER);
1024 else if (msg == WM_LBUTTONDOWN || (!timerRunning && msg == WM_SYSTIMER))
1025 {
1026 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1027 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1028 (TIMERPROC)0 );
1029 if (msg != WM_LBUTTONDOWN) timerRunning = TRUE;
1030 }
1031
1032 if (msg == WM_LBUTTONDOWN || SCROLL_lastHitTest != hittest)
1033 {
1034 SCROLL_DrawBottomArrow(hdc,infoPtr,&rect,arrowSize,vertical,(hittest == SCROLL_trackHitTest));
1035 SCROLL_lastHitTest = hittest;
1036 }
1037 if (hittest == SCROLL_trackHitTest && (msg == WM_LBUTTONDOWN || msg == WM_SYSTIMER))
1038 SendMessageA(hwndOwner,vertical ? WM_VSCROLL:WM_HSCROLL,SB_LINEDOWN,hwndCtl);
1039
1040 break;
1041 }
1042
1043 if (msg == WM_LBUTTONUP || msg == WM_CAPTURECHANGED)
1044 {
1045 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1046
1047 SendMessageA(hwndOwner,vertical ? WM_VSCROLL:WM_HSCROLL,SB_ENDSCROLL,hwndCtl);
1048 }
1049
1050 ReleaseDC( hwnd, hdc );
1051
1052 return res;
1053}
1054
1055/***********************************************************************
1056 * SCROLL_HandleKbdEvent
1057 *
1058 * Handle a keyboard event (only for SB_CTL scrollbars).
1059 */
1060LRESULT SCROLL_KeyDown(HWND hwnd,WPARAM wParam,LPARAM lParam)
1061{
1062 DWORD dwStyle = GetWindowLongA(hwnd,GWL_STYLE);
1063 UINT msg;
1064
1065 if (dwStyle & (SBS_SIZEBOX | SBS_SIZEGRIP)) return 0;
1066
1067 switch(wParam)
1068 {
1069 case VK_PRIOR: msg = SB_PAGEUP; break;
1070 case VK_NEXT: msg = SB_PAGEDOWN; break;
1071 case VK_HOME: msg = SB_TOP; break;
1072 case VK_END: msg = SB_BOTTOM; break;
1073 case VK_UP: msg = SB_LINEUP; break;
1074 case VK_DOWN: msg = SB_LINEDOWN; break;
1075 default:
1076 return 0;
1077 }
1078 SendMessageA( GetParent(hwnd),
1079 (dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
1080 msg, hwnd );
1081
1082 return 0;
1083}
1084
1085LRESULT SCROLL_Paint(HWND hwnd,WPARAM wParam,LPARAM lParam,INT nBar)
1086{
1087 PAINTSTRUCT ps;
1088 HDC hdc = wParam ? (HDC)wParam:BeginPaint( hwnd, &ps );
1089
1090 SCROLL_DrawScrollBar( hwnd, hdc, nBar, TRUE, TRUE );
1091 if (!wParam) EndPaint( hwnd, &ps );
1092
1093 return 0;
1094}
1095
1096LRESULT SCROLL_SetRange(HWND hwnd,WPARAM wParam,LPARAM lParam,INT nBar,BOOL redraw)
1097{
1098 SCROLLBAR_INFO *infoPtr = SCROLL_GetInfoPtr(hwnd,nBar);
1099 INT oldPos = infoPtr->CurVal;
1100
1101 SetScrollRange((nBar == SB_CTL) ? hwnd:SCROLL_GetFrameHandle(hwnd),nBar,wParam,lParam,redraw);
1102 return (oldPos != infoPtr->CurVal) ? infoPtr->CurVal:0;
1103}
1104
1105/* Window Procedures */
1106
1107/***********************************************************************
1108 * ScrollBarWndProc
1109 */
1110LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam,
1111 LPARAM lParam )
1112{
1113 switch(message)
1114 {
1115 case WM_NCCREATE:
1116 return SCROLL_NCCreate(hwnd,wParam,lParam);
1117
1118 case WM_CREATE:
1119 return SCROLL_Create(hwnd,wParam,lParam);
1120
1121 case WM_LBUTTONDOWN:
1122 case WM_LBUTTONUP:
1123 case WM_CAPTURECHANGED:
1124 case WM_MOUSEMOVE:
1125 case WM_SYSTIMER:
1126 case WM_SETFOCUS:
1127 case WM_KILLFOCUS:
1128 return SCROLL_HandleScrollEvent(hwnd,wParam,lParam,SB_CTL,message);
1129
1130 case WM_KEYDOWN:
1131 return SCROLL_KeyDown(hwnd,wParam,lParam);
1132
1133 case WM_ERASEBKGND:
1134 return 1;
1135
1136 case WM_GETDLGCODE:
1137 return DLGC_WANTARROWS; /* Windows returns this value */
1138
1139 case WM_PAINT:
1140 return SCROLL_Paint(hwnd,wParam,lParam,SB_CTL);
1141
1142 case SBM_SETPOS:
1143 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1144
1145 case SBM_GETPOS:
1146 return GetScrollPos( hwnd, SB_CTL );
1147
1148 case SBM_SETRANGE:
1149 return SCROLL_SetRange(hwnd,wParam,lParam,SB_CTL,FALSE);
1150
1151 case SBM_GETRANGE:
1152 GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
1153 return 0;
1154
1155 case SBM_ENABLE_ARROWS:
1156 return EnableScrollBar( hwnd, SB_CTL, wParam );
1157
1158 case SBM_SETRANGEREDRAW:
1159 return SCROLL_SetRange(hwnd,wParam,lParam,SB_CTL,TRUE);
1160
1161 case SBM_SETSCROLLINFO:
1162 return SetScrollInfo(hwnd,SB_CTL,(SCROLLINFO*)lParam,wParam);
1163
1164 case SBM_GETSCROLLINFO:
1165 return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
1166
1167 case 0x00e5:
1168 case 0x00e7:
1169 case 0x00e8:
1170 case 0x00eb:
1171 case 0x00ec:
1172 case 0x00ed:
1173 case 0x00ee:
1174 case 0x00ef:
1175 //ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1176 // message, wParam, lParam );
1177 break;
1178
1179 default:
1180 return DefWindowProcA( hwnd, message, wParam, lParam );
1181 }
1182
1183 return 0;
1184}
1185
1186/* frame handlers */
1187
1188VOID SCROLL_SubclassScrollBars(HWND hwndHorz,HWND hwndVert)
1189{
1190 if (hwndHorz) SetWindowLongA(hwndHorz,GWL_WNDPROC,(ULONG)HorzScrollBarWndProc);
1191 if (hwndVert) SetWindowLongA(hwndVert,GWL_WNDPROC,(ULONG)VertScrollBarWndProc);
1192}
1193
1194LRESULT WINAPI HorzScrollBarWndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam )
1195{
1196 switch (message)
1197 {
1198 case WM_LBUTTONDOWN:
1199 case WM_LBUTTONUP:
1200 case WM_CAPTURECHANGED:
1201 case WM_MOUSEMOVE:
1202 case WM_SYSTIMER:
1203 case WM_SETFOCUS:
1204 case WM_KILLFOCUS:
1205 return SCROLL_HandleScrollEvent(hwnd,wParam,lParam,SB_HORZ,message);
1206
1207 case WM_ERASEBKGND:
1208 return 1;
1209
1210 case WM_GETDLGCODE:
1211 return DLGC_WANTARROWS; /* Windows returns this value */
1212
1213 case WM_PAINT:
1214 return SCROLL_Paint(hwnd,wParam,lParam,SB_HORZ);
1215
1216 case SBM_SETPOS:
1217 return SetScrollPos(SCROLL_GetFrameHandle(hwnd),SB_HORZ,wParam,(BOOL)lParam);
1218
1219 case SBM_GETPOS:
1220 return GetScrollPos(SCROLL_GetFrameHandle(hwnd),SB_HORZ);
1221
1222 case SBM_SETRANGE:
1223 return SCROLL_SetRange(hwnd,wParam,lParam,SB_HORZ,FALSE);
1224
1225 case SBM_GETRANGE:
1226 GetScrollRange(SCROLL_GetFrameHandle(hwnd),SB_HORZ,(LPINT)wParam,(LPINT)lParam);
1227 return 0;
1228
1229 case SBM_ENABLE_ARROWS:
1230 return EnableScrollBar(SCROLL_GetFrameHandle(hwnd),SB_HORZ,wParam);
1231
1232 case SBM_SETRANGEREDRAW:
1233 return SCROLL_SetRange(hwnd,wParam,lParam,SB_HORZ,TRUE);
1234
1235 case SBM_SETSCROLLINFO:
1236 return SetScrollInfo(SCROLL_GetFrameHandle(hwnd),SB_HORZ,(SCROLLINFO*)lParam,wParam);
1237
1238 case SBM_GETSCROLLINFO:
1239 return GetScrollInfo(SCROLL_GetFrameHandle(hwnd),SB_HORZ,(SCROLLINFO*)lParam);
1240
1241 default:
1242 return DefWindowProcA(hwnd,message,wParam,lParam);
1243 }
1244
1245 return 0;
1246}
1247
1248LRESULT WINAPI VertScrollBarWndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam )
1249{
1250 switch (message)
1251 {
1252 case WM_LBUTTONDOWN:
1253 case WM_LBUTTONUP:
1254 case WM_CAPTURECHANGED:
1255 case WM_MOUSEMOVE:
1256 case WM_SYSTIMER:
1257 case WM_SETFOCUS:
1258 case WM_KILLFOCUS:
1259 return SCROLL_HandleScrollEvent(hwnd,wParam,lParam,SB_VERT,message);
1260
1261 case WM_ERASEBKGND:
1262 return 1;
1263
1264 case WM_GETDLGCODE:
1265 return DLGC_WANTARROWS; /* Windows returns this value */
1266
1267 case WM_PAINT:
1268 return SCROLL_Paint(hwnd,wParam,lParam,SB_VERT);
1269
1270 case SBM_SETPOS:
1271 return SetScrollPos(SCROLL_GetFrameHandle(hwnd),SB_VERT,wParam,(BOOL)lParam);
1272
1273 case SBM_GETPOS:
1274 return GetScrollPos(SCROLL_GetFrameHandle(hwnd),SB_VERT);
1275
1276 case SBM_SETRANGE:
1277 return SCROLL_SetRange(hwnd,wParam,lParam,SB_VERT,FALSE);
1278
1279 case SBM_GETRANGE:
1280 GetScrollRange(SCROLL_GetFrameHandle(hwnd),SB_VERT,(LPINT)wParam,(LPINT)lParam);
1281 return 0;
1282
1283 case SBM_ENABLE_ARROWS:
1284 return EnableScrollBar(SCROLL_GetFrameHandle(hwnd),SB_VERT,wParam);
1285
1286 case SBM_SETRANGEREDRAW:
1287 return SCROLL_SetRange(hwnd,wParam,lParam,SB_VERT,TRUE);
1288
1289 case SBM_SETSCROLLINFO:
1290 return SetScrollInfo(SCROLL_GetFrameHandle(hwnd),SB_VERT,(SCROLLINFO*)lParam,wParam);
1291
1292 case SBM_GETSCROLLINFO:
1293 return GetScrollInfo(SCROLL_GetFrameHandle(hwnd),SB_VERT,(SCROLLINFO*)lParam);
1294
1295 default:
1296 return DefWindowProcA(hwnd,message,wParam,lParam);
1297 }
1298
1299 return 0;
1300}
1301
1302/* Scrollbar API */
1303
1304/*************************************************************************
1305 * SetScrollInfo (USER32.501)
1306 * SetScrollInfo32 can be used to set the position, upper bound,
1307 * lower bound, and page size of a scrollbar control.
1308 *
1309 * RETURNS
1310 * Scrollbar position
1311 *
1312 * NOTE
1313 * For 100 lines of text to be displayed in a window of 25 lines,
1314 * one would for instance use info->nMin=0, info->nMax=75
1315 * (corresponding to the 76 different positions of the window on
1316 * the text), and info->nPage=25.
1317 */
1318INT WINAPI SetScrollInfo(HWND hwnd,INT nBar,const SCROLLINFO *info,BOOL bRedraw)
1319{
1320 /* Update the scrollbar state and set action flags according to
1321 * what has to be done graphics wise. */
1322
1323 SCROLLBAR_INFO *infoPtr;
1324 UINT new_flags;
1325 INT action = 0;
1326 HWND hwndScroll = SCROLL_GetScrollHandle(hwnd,nBar);
1327
1328 dprintf(("USER32: SetScrollInfo"));
1329
1330 if (!hwndScroll) return 0;
1331 if (!(infoPtr = SCROLL_GetInfoPtr(hwndScroll,nBar))) return 0;
1332 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1333 if ((info->cbSize != sizeof(*info)) &&
1334 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1335
1336 /* Set the page size */
1337 if (info->fMask & SIF_PAGE)
1338 {
1339 if( infoPtr->Page != info->nPage )
1340 {
1341 infoPtr->Page = info->nPage;
1342 action |= SA_SSI_REPAINT_INTERIOR;
1343 }
1344 }
1345
1346 /* Set the scroll pos */
1347 if (info->fMask & SIF_POS)
1348 {
1349 //dsprintf(scroll, " pos=%d", info->nPos );
1350 if( infoPtr->CurVal != info->nPos )
1351 {
1352 infoPtr->CurVal = info->nPos;
1353 action |= SA_SSI_MOVE_THUMB;
1354 }
1355 }
1356
1357 /* Set the scroll range */
1358 if (info->fMask & SIF_RANGE)
1359 {
1360 /* Invalid range -> range is set to (0,0) */
1361 if ((info->nMin > info->nMax) ||
1362 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1363 {
1364 infoPtr->MinVal = 0;
1365 infoPtr->MaxVal = 0;
1366 }
1367 else
1368 {
1369 if( infoPtr->MinVal != info->nMin ||
1370 infoPtr->MaxVal != info->nMax )
1371 {
1372 action |= SA_SSI_REPAINT_INTERIOR;
1373 infoPtr->MinVal = info->nMin;
1374 infoPtr->MaxVal = info->nMax;
1375 }
1376 }
1377 }
1378
1379 /* Make sure the page size is valid */
1380
1381 if (infoPtr->Page < 0) infoPtr->Page = 0;
1382 else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 )
1383 infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1;
1384
1385 /* Make sure the pos is inside the range */
1386
1387 if (infoPtr->CurVal < infoPtr->MinVal)
1388 infoPtr->CurVal = infoPtr->MinVal;
1389 else if (infoPtr->CurVal > infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1390 infoPtr->CurVal = infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 );
1391
1392 //TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1393 // infoPtr->Page, infoPtr->CurVal,
1394 // infoPtr->MinVal, infoPtr->MaxVal );
1395
1396 /* Check if the scrollbar should be hidden or disabled */
1397 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1398 {
1399 new_flags = infoPtr->flags;
1400 if (infoPtr->MinVal >= infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1401 {
1402 /* Hide or disable scroll-bar */
1403 if (info->fMask & SIF_DISABLENOSCROLL)
1404 {
1405 new_flags = ESB_DISABLE_BOTH;
1406 action |= SA_SSI_REFRESH;
1407 }
1408 else if (nBar != SB_CTL)
1409 {
1410 action = SA_SSI_HIDE;
1411 goto done;
1412 }
1413 }
1414 else /* Show and enable scroll-bar */
1415 {
1416 new_flags = 0;
1417 if (nBar != SB_CTL)
1418 action |= SA_SSI_SHOW;
1419 }
1420
1421 if (infoPtr->flags != new_flags) /* check arrow flags */
1422 {
1423 infoPtr->flags = new_flags;
1424 action |= SA_SSI_REPAINT_ARROWS;
1425 }
1426 }
1427
1428done:
1429 /* Update scrollbar */
1430
1431 if( action & SA_SSI_HIDE )
1432 ShowScrollBar(hwnd,nBar,FALSE);
1433 else
1434 {
1435 if(action & SA_SSI_SHOW)
1436 ShowScrollBar(hwnd,nBar,TRUE);
1437
1438 if(bRedraw && (action & SA_SSI_REFRESH))
1439 SCROLL_RefreshScrollBar(hwndScroll,nBar,TRUE,TRUE);
1440 else
1441 {
1442 if (action & SA_SSI_REPAINT_INTERIOR || action & SA_SSI_MOVE_THUMB)
1443 SCROLL_RefreshScrollBar(hwndScroll,nBar,FALSE,TRUE);
1444 if (action & SA_SSI_REPAINT_ARROWS )
1445 SCROLL_RefreshScrollBar(hwndScroll,nBar,TRUE,FALSE);
1446 }
1447 }
1448
1449 /* Return current position */
1450
1451 return infoPtr->CurVal;
1452}
1453/*************************************************************************
1454 * GetScrollInfo (USER32.284)
1455 * GetScrollInfo32 can be used to retrieve the position, upper bound,
1456 * lower bound, and page size of a scrollbar control.
1457 *
1458 * RETURNS STD
1459 */
1460BOOL WINAPI GetScrollInfo(
1461 HWND hwnd /* [I] Handle of window */ ,
1462 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1463 LPSCROLLINFO info /* [IO] (info.fMask [I] specifies which values are to retrieve) */)
1464{
1465 SCROLLBAR_INFO *infoPtr;
1466
1467 dprintf(("USER32: GetScrollInfo"));
1468
1469 if (!(infoPtr = SCROLL_GetInfoPtr(SCROLL_GetScrollHandle(hwnd,nBar),nBar))) return FALSE;
1470 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1471 if ((info->cbSize != sizeof(*info)) &&
1472 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1473
1474 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page;
1475 if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal;
1476 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1477 info->nTrackPos = (SCROLL_TrackingWin==hwnd) ? SCROLL_TrackingVal : infoPtr->CurVal;
1478 if (info->fMask & SIF_RANGE)
1479 {
1480 info->nMin = infoPtr->MinVal;
1481 info->nMax = infoPtr->MaxVal;
1482 }
1483 return (info->fMask & SIF_ALL) != 0;
1484}
1485/*************************************************************************
1486 * SetScrollPos (USER32.502)
1487 *
1488 * RETURNS
1489 * Success: Scrollbar position
1490 * Failure: 0
1491 *
1492 * REMARKS
1493 * Note the ambiguity when 0 is returned. Use GetLastError
1494 * to make sure there was an error (and to know which one).
1495 */
1496INT WINAPI SetScrollPos(
1497 HWND hwnd /* [I] Handle of window whose scrollbar will be affected */,
1498 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1499 INT nPos /* [I] New value */,
1500 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */ )
1501{
1502 SCROLLINFO info;
1503 SCROLLBAR_INFO *infoPtr;
1504 INT oldPos;
1505
1506 dprintf(("SetScrollPos %x %d %d %d", hwnd, nBar, nPos, bRedraw));
1507 if (!(infoPtr = SCROLL_GetInfoPtr(SCROLL_GetScrollHandle(hwnd,nBar),nBar))) return 0;
1508 oldPos = infoPtr->CurVal;
1509 info.cbSize = sizeof(info);
1510 info.nPos = nPos;
1511 info.fMask = SIF_POS;
1512 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1513 return oldPos;
1514}
1515/*************************************************************************
1516 * GetScrollPos (USER32.285)
1517 *
1518 * RETURNS
1519 * Success: Current position
1520 * Failure: 0
1521 *
1522 * REMARKS
1523 * Note the ambiguity when 0 is returned. Use GetLastError
1524 * to make sure there was an error (and to know which one).
1525 */
1526INT WINAPI GetScrollPos(
1527 HWND hwnd, /* [I] Handle of window */
1528 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */)
1529{
1530 SCROLLBAR_INFO *infoPtr;
1531
1532 dprintf(("GetScrollPos %x %d", hwnd, nBar));
1533
1534 infoPtr = SCROLL_GetInfoPtr(SCROLL_GetScrollHandle(hwnd,nBar),nBar);
1535 if (!infoPtr) return 0;
1536
1537 return infoPtr->CurVal;
1538}
1539/*************************************************************************
1540 * SetScrollRange (USER32.503)
1541 *
1542 * RETURNS STD
1543 */
1544BOOL WINAPI SetScrollRange(
1545 HWND hwnd, /* [I] Handle of window whose scrollbar will be affected */
1546 INT nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
1547 INT MinVal, /* [I] New minimum value */
1548 INT MaxVal, /* [I] New maximum value */
1549 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
1550{
1551 SCROLLINFO info;
1552
1553 dprintf(("SetScrollRange %x %x %d %d %d", hwnd, nBar, MinVal, MaxVal, bRedraw));
1554 info.cbSize = sizeof(info);
1555 info.nMin = MinVal;
1556 info.nMax = MaxVal;
1557 info.fMask = SIF_RANGE;
1558 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1559 return TRUE;
1560}
1561
1562/*************************************************************************
1563 * GetScrollRange (USER32.286)
1564 *
1565 * RETURNS STD
1566 */
1567BOOL WINAPI GetScrollRange(
1568 HWND hwnd, /* [I] Handle of window */
1569 INT nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
1570 LPINT lpMin, /* [O] Where to store minimum value */
1571 LPINT lpMax /* [O] Where to store maximum value */)
1572{
1573 SCROLLBAR_INFO *infoPtr;
1574
1575 infoPtr = SCROLL_GetInfoPtr(SCROLL_GetScrollHandle(hwnd,nBar),nBar);
1576 if (!infoPtr)
1577 {
1578 if (lpMin) lpMin = 0;
1579 if (lpMax) lpMax = 0;
1580 return FALSE;
1581 }
1582 if (lpMin) *lpMin = infoPtr->MinVal;
1583 if (lpMax) *lpMax = infoPtr->MaxVal;
1584 return TRUE;
1585}
1586
1587/*************************************************************************
1588 * ShowScrollBar (USER32.532)
1589 *
1590 * RETURNS STD
1591 */
1592BOOL WINAPI ShowScrollBar(
1593 HWND hwnd, /* [I] Handle of window whose scrollbar(s) will be affected */
1594 INT nBar, /* [I] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1595 BOOL fShow /* [I] TRUE = show, FALSE = hide */)
1596{
1597 dprintf(("ShowScrollBar %04x %d %d\n", hwnd, nBar, fShow));
1598
1599 if (nBar == SB_CTL)
1600 {
1601 ShowWindow(hwnd,fShow ? SW_SHOW:SW_HIDE);
1602
1603 return TRUE;
1604 } else
1605 {
1606 Win32BaseWindow *window = Win32BaseWindow::GetWindowFromHandle(hwnd);
1607 BOOL createHorz = FALSE,createVert = FALSE;
1608
1609 if (!window)
1610 {
1611 dprintf(("ShowScrollBar window not found!"));
1612 SetLastError(ERROR_INVALID_WINDOW_HANDLE);
1613 return 0;
1614 }
1615
1616 return window->showScrollBars(nBar == SB_HORZ || nBar == SB_BOTH,nBar == SB_VERT || nBar == SB_BOTH,fShow);
1617 }
1618
1619 return TRUE;
1620}
1621
1622/*************************************************************************
1623 * EnableScrollBar (USER32.171)
1624 */
1625BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags)
1626{
1627 Win32BaseWindow *window;
1628 SCROLLBAR_INFO *infoPtr;
1629
1630 dprintf(("EnableScrollBar %04x %d %d\n", hwnd, nBar, flags));
1631
1632 if (nBar == SB_CTL)
1633 {
1634 if (!(infoPtr = SCROLL_GetInfoPtr(hwnd,nBar))) return FALSE;
1635
1636 if (infoPtr->flags != flags)
1637 {
1638 infoPtr->flags = flags;
1639 SCROLL_RefreshScrollBar(hwnd,nBar,TRUE,TRUE);
1640 }
1641
1642 return TRUE;
1643 } else
1644 {
1645 Win32BaseWindow *window = Win32BaseWindow::GetWindowFromHandle(hwnd);
1646 if(!window)
1647 {
1648 dprintf(("EnableScrollBar window not found!"));
1649 SetLastError(ERROR_INVALID_WINDOW_HANDLE);
1650 return FALSE;
1651 }
1652
1653 if(window->getStyle() & (WS_HSCROLL | WS_VSCROLL))
1654 {
1655 BOOL rc = FALSE;
1656
1657 if (nBar == SB_VERT || nBar == SB_BOTH)
1658 {
1659 HWND hwndScroll = Win32BaseWindow::OS2ToWin32Handle(window->getVertScrollHandle());
1660
1661 infoPtr = SCROLL_GetInfoPtr(hwndScroll,SB_VERT);
1662 if (infoPtr)
1663 {
1664 if (infoPtr->flags != flags)
1665 {
1666 infoPtr->flags = flags;
1667 SCROLL_RefreshScrollBar(hwndScroll,nBar,TRUE,TRUE);
1668 }
1669
1670 rc = TRUE;
1671 }
1672 }
1673 if (nBar == SB_HORZ || (rc && nBar == SB_BOTH))
1674 {
1675 HWND hwndScroll = Win32BaseWindow::OS2ToWin32Handle(window->getVertScrollHandle());
1676
1677 infoPtr = SCROLL_GetInfoPtr(hwndScroll,SB_VERT);
1678 if (infoPtr)
1679 {
1680 if (infoPtr->flags != flags)
1681 {
1682 infoPtr->flags = flags;
1683 SCROLL_RefreshScrollBar(hwndScroll,nBar,TRUE,TRUE);
1684 }
1685
1686 rc = TRUE;
1687 }
1688 }
1689
1690 return rc;
1691 }
1692 }
1693
1694 return TRUE;
1695}
1696
1697//CB: not listed in user32.exp -> don't know the id!
1698
1699BOOL WINAPI GetScrollBarInfo(HWND hwnd,LONG idObject,PSCROLLBARINFO psbi)
1700{
1701 if (!psbi || psbi->cbSize != sizeof(SCROLLBARINFO))
1702 {
1703 SetLastError(ERROR_INVALID_PARAMETER);
1704
1705 return FALSE;
1706 }
1707
1708 HWND hwndScroll;
1709 INT nBar,arrowSize;
1710
1711 switch (idObject)
1712 {
1713 case OBJID_CLIENT:
1714 nBar = SB_CTL;
1715 hwndScroll = hwnd;
1716 break;
1717
1718 case OBJID_HSCROLL:
1719 nBar = SB_HORZ;
1720 hwndScroll = SCROLL_GetScrollHandle(hwnd,SB_HORZ);
1721 break;
1722
1723 case OBJID_VSCROLL:
1724 nBar = SB_VERT;
1725 hwndScroll = SCROLL_GetScrollHandle(hwnd,SB_VERT);
1726 break;
1727
1728 default:
1729 return FALSE;
1730 }
1731
1732 if (!hwndScroll) return FALSE;
1733
1734 SCROLL_GetScrollBarRect(hwndScroll,nBar,&psbi->rcScrollBar,&arrowSize,&psbi->dxyLineButton,&psbi->xyThumbTop);
1735 psbi->xyThumbBottom = psbi->xyThumbTop+psbi->dxyLineButton;
1736 psbi->bogus = 0; //CB: undocumented!
1737 psbi->rgstate[0] = IsWindowVisible(hwndScroll) ? STATE_SYSTEM_INVISIBLE:0;
1738 psbi->rgstate[1] = psbi->rgstate[2] = psbi->rgstate[3] = psbi->rgstate[4] = psbi->rgstate[5] = psbi->rgstate[0]; //CB: todo
1739
1740 return TRUE;
1741}
1742//******************************************************************************
1743//******************************************************************************
1744BOOL SCROLLBAR_Register()
1745{
1746 WNDCLASSA wndClass;
1747
1748//SvL: Don't check this now
1749// if (GlobalFindAtomA(SCROLLBARCLASSNAME)) return FALSE;
1750
1751 ZeroMemory(&wndClass,sizeof(WNDCLASSA));
1752 wndClass.style = CS_GLOBALCLASS | CS_HREDRAW | CS_VREDRAW | CS_PARENTDC;
1753 wndClass.lpfnWndProc = (WNDPROC)ScrollBarWndProc;
1754 wndClass.cbClsExtra = 0;
1755 wndClass.cbWndExtra = sizeof(SCROLLBAR_INFO);
1756 wndClass.hCursor = LoadCursorA(0,IDC_ARROWA);
1757 wndClass.hbrBackground = (HBRUSH)0;
1758 wndClass.lpszClassName = SCROLLBARCLASSNAME;
1759
1760 return RegisterClassA(&wndClass);
1761}
1762//******************************************************************************
1763//******************************************************************************
1764BOOL SCROLLBAR_Unregister()
1765{
1766 if (GlobalFindAtomA(SCROLLBARCLASSNAME))
1767 return UnregisterClassA(SCROLLBARCLASSNAME,(HINSTANCE)NULL);
1768 else return FALSE;
1769}
1770//******************************************************************************
1771//******************************************************************************
1772
Note: See TracBrowser for help on using the repository browser.