source: trunk/src/user32/scroll.cpp@ 1036

Last change on this file since 1036 was 949, checked in by sandervl, 26 years ago

Moved new user32 here
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1/* $Id: scroll.cpp,v 1.1 1999-09-15 23:18:55 sandervl Exp $ */
2/*
3 * Scrollbar control
4 *
5 * Copyright 1999 Christoph Bratschi (ported from WINE)
6 *
7 * Copyright 1993 Martin Ayotte
8 * Copyright 1994, 1996 Alexandre Julliard
9 */
10
11/* CB:
12 - exported API removed, this functions are already implemented by Open32,
13 code perhaps useful for new user32
14 - only control, default scroll bars for windows need more work
15 - SystemTimer not implemented
16*/
17
18#include <stdlib.h>
19#include "winuser.h"
20#include "winbase.h"
21#include "controls.h"
22#include "scroll.h"
23
24static HBITMAP hUpArrow = 0;
25static HBITMAP hDnArrow = 0;
26static HBITMAP hLfArrow = 0;
27static HBITMAP hRgArrow = 0;
28static HBITMAP hUpArrowD = 0;
29static HBITMAP hDnArrowD = 0;
30static HBITMAP hLfArrowD = 0;
31static HBITMAP hRgArrowD = 0;
32static HBITMAP hUpArrowI = 0;
33static HBITMAP hDnArrowI = 0;
34static HBITMAP hLfArrowI = 0;
35static HBITMAP hRgArrowI = 0;
36
37#define TOP_ARROW(flags,pressed) \
38 (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
39#define BOTTOM_ARROW(flags,pressed) \
40 (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
41#define LEFT_ARROW(flags,pressed) \
42 (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
43#define RIGHT_ARROW(flags,pressed) \
44 (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
45
46
47 /* Minimum size of the rectangle between the arrows */
48#define SCROLL_MIN_RECT 4
49
50 /* Minimum size of the thumb in pixels */
51#define SCROLL_MIN_THUMB 6
52
53 /* Overlap between arrows and thumb */
54#define SCROLL_ARROW_THUMB_OVERLAP 0
55
56 /* Delay (in ms) before first repetition when holding the button down */
57#define SCROLL_FIRST_DELAY 200
58
59 /* Delay (in ms) between scroll repetitions */
60#define SCROLL_REPEAT_DELAY 50
61
62 /* Scroll timer id */
63#define SCROLL_TIMER 0
64
65 /* Scroll-bar hit testing */
66enum SCROLL_HITTEST
67{
68 SCROLL_NOWHERE, /* Outside the scroll bar */
69 SCROLL_TOP_ARROW, /* Top or left arrow */
70 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
71 SCROLL_THUMB, /* Thumb rectangle */
72 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
73 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
74};
75
76 /* What to do after SCROLL_SetScrollInfo() */
77#define SA_SSI_HIDE 0x0001
78#define SA_SSI_SHOW 0x0002
79#define SA_SSI_REFRESH 0x0004
80#define SA_SSI_REPAINT_ARROWS 0x0008
81
82 /* Thumb-tracking info */
83static HWND SCROLL_TrackingWin = 0;
84static INT SCROLL_TrackingBar = 0;
85static INT SCROLL_TrackingPos = 0;
86static INT SCROLL_TrackingVal = 0;
87 /* Hit test code of the last button-down event */
88static enum SCROLL_HITTEST SCROLL_trackHitTest;
89static BOOL SCROLL_trackVertical;
90
91 /* Is the moving thumb being displayed? */
92static BOOL SCROLL_MovingThumb = FALSE;
93
94 /* Local functions */
95static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
96 BOOL fShowH, BOOL fShowV );
97static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
98 const SCROLLINFO *info, INT *action );
99static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
100 RECT *rect, INT arrowSize,
101 INT thumbSize, INT thumbPos,
102 UINT flags, BOOL vertical,
103 BOOL top_selected, BOOL bottom_selected );
104
105/***********************************************************************
106 * SCROLL_LoadBitmaps
107 */
108static void SCROLL_LoadBitmaps(void)
109{
110 hUpArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
111 hDnArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
112 hLfArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
113 hRgArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
114 hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
115 hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
116 hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
117 hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
118 hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
119 hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
120 hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
121 hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
122}
123
124/***********************************************************************
125 * SCROLL_GetPtrScrollInfo
126 */
127static SCROLLBAR_INFO *SCROLL_GetPtrScrollInfo( HWND hwnd, INT nBar )
128{
129 SCROLLBAR_INFO *infoPtr;
130
131 switch(nBar)
132 {
133/* CB: implement this later!
134 case SB_HORZ:
135 infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll;
136 break;
137 case SB_VERT:
138 infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll;
139 break;
140*/
141 case SB_CTL:
142 infoPtr = (SCROLLBAR_INFO *)GetInfoPtr(hwnd);
143 break;
144 default: return NULL;
145 }
146
147 if (!infoPtr) /* Create the info structure if needed */
148 {
149 infoPtr = (SCROLLBAR_INFO*)malloc(sizeof(SCROLLBAR_INFO));
150 infoPtr->MinVal = infoPtr->CurVal = infoPtr->Page = 0;
151 infoPtr->MaxVal = 100;
152 infoPtr->flags = ESB_ENABLE_BOTH;
153
154 //CB: store in window class if not control!
155 SetInfoPtr(hwnd,(DWORD)infoPtr);
156
157 if (!hUpArrow) SCROLL_LoadBitmaps();
158 }
159 return infoPtr;
160}
161
162
163/***********************************************************************
164 * SCROLL_GetScrollInfo
165 */
166static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND hwnd, INT nBar )
167{
168 return SCROLL_GetPtrScrollInfo( hwnd, nBar );
169}
170
171
172/***********************************************************************
173 * SCROLL_GetScrollBarRect
174 *
175 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
176 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
177 * 'arrowSize' returns the width or height of an arrow (depending on
178 * the orientation of the scrollbar), 'thumbSize' returns the size of
179 * the thumb, and 'thumbPos' returns the position of the thumb
180 * relative to the left or to the top.
181 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
182 */
183static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
184 INT *arrowSize, INT *thumbSize,
185 INT *thumbPos )
186{
187 INT pixels;
188 BOOL vertical;
189 DWORD dwStyle = GetWindowLongA(hwnd,GWL_STYLE);
190 RECT rectClient;
191
192 switch(nBar)
193 {
194/* CB: implement later!
195 case SB_HORZ:
196 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
197 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
198 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
199 lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
200 if(dwStyle & WS_BORDER) {
201 lprect->left--;
202 lprect->right++;
203 } else if(dwStyle & WS_VSCROLL)
204 lprect->right++;
205 vertical = FALSE;
206 break;
207
208 case SB_VERT:
209 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
210 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
211 lprect->right = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
212 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
213 if(wndPtr->dwStyle & WS_BORDER) {
214 lprect->top--;
215 lprect->bottom++;
216 } else if(wndPtr->dwStyle & WS_HSCROLL)
217 lprect->bottom++;
218 vertical = TRUE;
219 break;
220*/
221 case SB_CTL:
222 GetClientRect( hwnd, lprect );
223 vertical = ((dwStyle & SBS_VERT) != 0);
224 break;
225
226 default:
227 return FALSE;
228 }
229
230 if (vertical) pixels = lprect->bottom - lprect->top;
231 else pixels = lprect->right - lprect->left;
232
233 if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
234 {
235 if (pixels > SCROLL_MIN_RECT)
236 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
237 else
238 *arrowSize = 0;
239 *thumbPos = *thumbSize = 0;
240 }
241 else
242 {
243 SCROLLBAR_INFO *info = SCROLL_GetPtrScrollInfo( hwnd, nBar );
244
245 *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
246 pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
247
248 if (info->Page)
249 {
250 *thumbSize = pixels * info->Page / (info->MaxVal-info->MinVal+1);
251 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
252 }
253 else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
254
255 if (((pixels -= *thumbSize ) < 0) ||
256 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
257 {
258 /* Rectangle too small or scrollbar disabled -> no thumb */
259 *thumbPos = *thumbSize = 0;
260 }
261 else
262 {
263 INT max = info->MaxVal - MAX( info->Page-1, 0 );
264 if (info->MinVal >= max)
265 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
266 else
267 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
268 + pixels * (info->CurVal-info->MinVal) / (max - info->MinVal);
269 }
270 }
271 return vertical;
272}
273
274
275/***********************************************************************
276 * SCROLL_GetThumbVal
277 *
278 * Compute the current scroll position based on the thumb position in pixels
279 * from the top of the scroll-bar.
280 */
281static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
282 BOOL vertical, INT pos )
283{
284 INT thumbSize;
285 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
286
287 if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
288 return infoPtr->MinVal;
289
290 if (infoPtr->Page)
291 {
292 thumbSize = pixels * infoPtr->Page/(infoPtr->MaxVal-infoPtr->MinVal+1);
293 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
294 }
295 else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
296
297 if ((pixels -= thumbSize) <= 0) return infoPtr->MinVal;
298
299 pos = MAX( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
300 if (pos > pixels) pos = pixels;
301
302 if (!infoPtr->Page) pos *= infoPtr->MaxVal - infoPtr->MinVal;
303 else pos *= infoPtr->MaxVal - infoPtr->MinVal - infoPtr->Page + 1;
304 return infoPtr->MinVal + ((pos + pixels / 2) / pixels);
305}
306
307/***********************************************************************
308 * SCROLL_PtInRectEx
309 */
310static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
311{
312 RECT rect = *lpRect;
313
314 if (vertical)
315 {
316 rect.left -= lpRect->right - lpRect->left;
317 rect.right += lpRect->right - lpRect->left;
318 }
319 else
320 {
321 rect.top -= lpRect->bottom - lpRect->top;
322 rect.bottom += lpRect->bottom - lpRect->top;
323 }
324 return PtInRect( &rect, pt );
325}
326
327/***********************************************************************
328 * SCROLL_ClipPos
329 */
330static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
331{
332 if( pt.x < lpRect->left )
333 pt.x = lpRect->left;
334 else
335 if( pt.x > lpRect->right )
336 pt.x = lpRect->right;
337
338 if( pt.y < lpRect->top )
339 pt.y = lpRect->top;
340 else
341 if( pt.y > lpRect->bottom )
342 pt.y = lpRect->bottom;
343
344 return pt;
345}
346
347
348/***********************************************************************
349 * SCROLL_HitTest
350 *
351 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
352 */
353static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
354 POINT pt, BOOL bDragging )
355{
356 INT arrowSize, thumbSize, thumbPos;
357 RECT rect;
358
359 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
360 &arrowSize, &thumbSize, &thumbPos );
361
362 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
363 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
364
365 if (vertical)
366 {
367 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
368 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
369 if (!thumbPos) return SCROLL_TOP_RECT;
370 pt.y -= rect.top;
371 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
372 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
373 }
374 else /* horizontal */
375 {
376 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
377 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
378 if (!thumbPos) return SCROLL_TOP_RECT;
379 pt.x -= rect.left;
380 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
381 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
382 }
383 return SCROLL_THUMB;
384}
385
386/***********************************************************************
387 * SCROLL_DrawArrows
388 *
389 * Draw the scroll bar arrows.
390 */
391static void SCROLL_DrawArrows_9x( HDC hdc, SCROLLBAR_INFO *infoPtr,
392 RECT *rect, INT arrowSize, BOOL vertical,
393 BOOL top_pressed, BOOL bottom_pressed )
394{
395 RECT r;
396
397 r = *rect;
398 if( vertical )
399 r.bottom = r.top + arrowSize;
400 else
401 r.right = r.left + arrowSize;
402
403 DrawFrameControl( hdc, &r, DFC_SCROLL,
404 (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
405 | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
406 | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
407
408 r = *rect;
409 if( vertical )
410 r.top = r.bottom-arrowSize;
411 else
412 r.left = r.right-arrowSize;
413
414 DrawFrameControl( hdc, &r, DFC_SCROLL,
415 (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
416 | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
417 | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
418}
419
420static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
421 RECT *rect, INT arrowSize, BOOL vertical,
422 BOOL top_pressed, BOOL bottom_pressed )
423{
424 SCROLL_DrawArrows_9x( hdc, infoPtr, rect, arrowSize,
425 vertical, top_pressed,bottom_pressed );
426}
427
428
429/***********************************************************************
430 * SCROLL_DrawMovingThumb
431 *
432 * Draw the moving thumb rectangle.
433 */
434static void SCROLL_DrawMovingThumb_9x( HDC hdc, RECT *rect, BOOL vertical,
435 INT arrowSize, INT thumbSize )
436{
437 INT pos = SCROLL_TrackingPos;
438 INT max_size;
439
440 if( vertical )
441 max_size = rect->bottom - rect->top;
442 else
443 max_size = rect->right - rect->left;
444
445 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
446
447 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
448 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
449 else if( pos > max_size )
450 pos = max_size;
451
452 SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
453 rect, arrowSize, thumbSize, pos,
454 0, vertical, FALSE, FALSE );
455
456 SCROLL_MovingThumb = !SCROLL_MovingThumb;
457}
458
459static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
460 INT arrowSize, INT thumbSize )
461{
462 SCROLL_DrawMovingThumb_9x( hdc, rect, vertical, arrowSize, thumbSize );
463}
464
465/***********************************************************************
466 * SCROLL_DrawInterior
467 *
468 * Draw the scroll bar interior (everything except the arrows).
469 */
470static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
471 RECT *rect, INT arrowSize,
472 INT thumbSize, INT thumbPos,
473 UINT flags, BOOL vertical,
474 BOOL top_selected, BOOL bottom_selected )
475{
476 RECT r;
477 HPEN hSavePen;
478 HBRUSH hSaveBrush,hBrush;
479
480 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
481 * The window-owned scrollbars need to call DEFWND_ControlColor
482 * to correctly setup default scrollbar colors
483 */
484 if (nBar == SB_CTL)
485 {
486 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
487 (WPARAM)hdc,(LPARAM)hwnd);
488 }
489 else
490 {
491 //CB: implement!
492 //hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
493 }
494
495 hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
496 hSaveBrush = SelectObject( hdc, hBrush );
497
498 /* Calculate the scroll rectangle */
499 r = *rect;
500 if (vertical)
501 {
502 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
503 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
504 }
505 else
506 {
507 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
508 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
509 }
510
511 /* Draw the scroll rectangles and thumb */
512 if (!thumbPos) /* No thumb to draw */
513 {
514 PatBlt( hdc, r.left, r.top,
515 r.right - r.left, r.bottom - r.top,
516 PATCOPY );
517
518 /* cleanup and return */
519 SelectObject( hdc, hSavePen );
520 SelectObject( hdc, hSaveBrush );
521 return;
522 }
523
524 if (vertical)
525 {
526 PatBlt( hdc, r.left, r.top,
527 r.right - r.left,
528 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
529 top_selected ? 0x0f0000 : PATCOPY );
530 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
531 PatBlt( hdc, r.left, r.top + thumbSize,
532 r.right - r.left,
533 r.bottom - r.top - thumbSize,
534 bottom_selected ? 0x0f0000 : PATCOPY );
535 r.bottom = r.top + thumbSize;
536 }
537 else /* horizontal */
538 {
539 PatBlt( hdc, r.left, r.top,
540 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
541 r.bottom - r.top,
542 top_selected ? 0x0f0000 : PATCOPY );
543 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
544 PatBlt( hdc, r.left + thumbSize, r.top,
545 r.right - r.left - thumbSize,
546 r.bottom - r.top,
547 bottom_selected ? 0x0f0000 : PATCOPY );
548 r.right = r.left + thumbSize;
549 }
550
551 /* Draw the thumb */
552 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
553
554 /* cleanup */
555 SelectObject( hdc, hSavePen );
556 SelectObject( hdc, hSaveBrush );
557}
558
559
560static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
561 RECT *rect, INT arrowSize,
562 INT thumbSize, INT thumbPos,
563 UINT flags, BOOL vertical,
564 BOOL top_selected, BOOL bottom_selected )
565{
566 RECT r;
567 HPEN hSavePen;
568 HBRUSH hSaveBrush,hBrush;
569 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
570
571 if (Save_SCROLL_MovingThumb &&
572 (SCROLL_TrackingWin == hwnd) &&
573 (SCROLL_TrackingBar == nBar))
574 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
575
576 /* Select the correct brush and pen */
577
578 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
579 * The window-owned scrollbars need to call DEFWND_ControlColor
580 * to correctly setup default scrollbar colors
581 */
582 if (nBar == SB_CTL) {
583 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
584 (WPARAM)hdc,(LPARAM)hwnd);
585 } else {
586 //CB: implement!
587 //hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
588 }
589
590 hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
591 hSaveBrush = SelectObject( hdc, hBrush );
592
593 /* Calculate the scroll rectangle */
594
595 r = *rect;
596 if (vertical)
597 {
598 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
599 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
600 }
601 else
602 {
603 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
604 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
605 }
606
607 /* Draw the scroll bar frame */
608
609 /* Only draw outline if Win 3.1. Mar 24, 1999 - Ronald B. Cemer */
610
611 /* Draw the scroll rectangles and thumb */
612
613 if (!thumbPos) /* No thumb to draw */
614 {
615 INT offset = 0;
616
617 PatBlt( hdc, r.left+offset, r.top+offset,
618 r.right - r.left - 2*offset, r.bottom - r.top - 2*offset,
619 PATCOPY );
620
621 /* cleanup and return */
622 SelectObject( hdc, hSavePen );
623 SelectObject( hdc, hSaveBrush );
624 return;
625 }
626
627 if (vertical)
628 {
629 INT offset = 0;
630
631 PatBlt( hdc, r.left + offset, r.top + offset,
632 r.right - r.left - offset*2,
633 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - offset,
634 top_selected ? 0x0f0000 : PATCOPY );
635 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
636 PatBlt( hdc, r.left + offset, r.top + thumbSize,
637 r.right - r.left - offset*2,
638 r.bottom - r.top - thumbSize - offset,
639 bottom_selected ? 0x0f0000 : PATCOPY );
640 r.bottom = r.top + thumbSize;
641 }
642 else /* horizontal */
643 {
644 INT offset = 0;
645
646 PatBlt( hdc, r.left + offset, r.top + offset,
647 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
648 r.bottom - r.top - offset*2,
649 top_selected ? 0x0f0000 : PATCOPY );
650 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
651 PatBlt( hdc, r.left + thumbSize, r.top + offset,
652 r.right - r.left - thumbSize - offset,
653 r.bottom - r.top - offset*2,
654 bottom_selected ? 0x0f0000 : PATCOPY );
655 r.right = r.left + thumbSize;
656 }
657
658 /* Draw the thumb */
659
660 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
661
662 Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
663
664 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
665
666 if (Save_SCROLL_MovingThumb &&
667 (SCROLL_TrackingWin == hwnd) &&
668 (SCROLL_TrackingBar == nBar))
669 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
670
671 /* cleanup */
672 SelectObject( hdc, hSavePen );
673 SelectObject( hdc, hSaveBrush );
674}
675
676/***********************************************************************
677 * SCROLL_DrawScrollBar
678 *
679 * Redraw the whole scrollbar.
680 */
681void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
682 BOOL arrows, BOOL interior )
683{
684 INT arrowSize, thumbSize, thumbPos;
685 RECT rect;
686 BOOL vertical;
687 SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo( hwnd, nBar );
688 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
689 DWORD dwStyle = GetWindowLongA(hwnd,GWL_STYLE);
690
691 if (!infoPtr ||
692 ((nBar == SB_VERT) && !(dwStyle & WS_VSCROLL)) ||
693 ((nBar == SB_HORZ) && !(dwStyle & WS_HSCROLL))) return;
694 //if (!WIN_IsWindowDrawable( hwnd, FALSE )) return; //CB: what's that???
695
696 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
697 &arrowSize, &thumbSize, &thumbPos );
698
699 if (Save_SCROLL_MovingThumb &&
700 (SCROLL_TrackingWin == hwnd) &&
701 (SCROLL_TrackingBar == nBar))
702 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
703
704 /* Draw the arrows */
705
706 if (arrows && arrowSize)
707 {
708 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
709 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
710 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
711 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
712 else
713 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
714 FALSE, FALSE );
715 }
716 if( interior )
717 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
718 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
719
720 if (Save_SCROLL_MovingThumb &&
721 (SCROLL_TrackingWin == hwnd) &&
722 (SCROLL_TrackingBar == nBar))
723 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
724
725}
726
727
728/***********************************************************************
729 * SCROLL_RefreshScrollBar
730 *
731 * Repaint the scroll bar interior after a SetScrollRange() or
732 * SetScrollPos() call.
733 */
734static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
735 BOOL arrows, BOOL interior )
736{
737 HDC hdc = GetDCEx( hwnd, 0,
738 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
739 if (!hdc) return;
740
741 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
742 ReleaseDC( hwnd, hdc );
743}
744
745
746/***********************************************************************
747 * SCROLL_HandleKbdEvent
748 *
749 * Handle a keyboard event (only for SB_CTL scrollbars).
750 */
751static void SCROLL_HandleKbdEvent( HWND hwnd, WPARAM wParam )
752{
753 DWORD dwStyle = GetWindowLongA(hwnd,GWL_STYLE);
754 WPARAM msg;
755
756 switch(wParam)
757 {
758 case VK_PRIOR: msg = SB_PAGEUP; break;
759 case VK_NEXT: msg = SB_PAGEDOWN; break;
760 case VK_HOME: msg = SB_TOP; break;
761 case VK_END: msg = SB_BOTTOM; break;
762 case VK_UP: msg = SB_LINEUP; break;
763 case VK_DOWN: msg = SB_LINEDOWN; break;
764 default:
765 return;
766 }
767 SendMessageA( GetParent(hwnd),
768 (dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
769 msg, hwnd );
770}
771
772
773/***********************************************************************
774 * SCROLL_HandleScrollEvent
775 *
776 * Handle a mouse or timer event for the scrollbar.
777 * 'pt' is the location of the mouse event in client (for SB_CTL) or
778 * windows coordinates.
779 */
780void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
781{
782 /* Previous mouse position for timer events */
783 static POINT prevPt;
784 /* Thumb position when tracking started. */
785 static UINT trackThumbPos;
786 /* Position in the scroll-bar of the last button-down event. */
787 static INT lastClickPos;
788 /* Position in the scroll-bar of the last mouse event. */
789 static INT lastMousePos;
790
791 enum SCROLL_HITTEST hittest;
792 HWND hwndOwner, hwndCtl;
793 BOOL vertical;
794 INT arrowSize, thumbSize, thumbPos;
795 RECT rect;
796 HDC hdc;
797
798 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
799 if (!infoPtr) return;
800 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
801 return;
802
803 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
804 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
805 &arrowSize, &thumbSize, &thumbPos );
806 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
807 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
808
809 switch(msg)
810 {
811 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
812 SCROLL_trackVertical = vertical;
813 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
814 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
815 lastMousePos = lastClickPos;
816 trackThumbPos = thumbPos;
817 prevPt = pt;
818 SetCapture( hwnd );
819 if (nBar == SB_CTL) SetFocus( hwnd );
820 break;
821
822 case WM_MOUSEMOVE:
823 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
824 prevPt = pt;
825 break;
826
827 case WM_LBUTTONUP:
828 hittest = SCROLL_NOWHERE;
829 ReleaseCapture();
830 break;
831
832 case WM_SYSTIMER:
833 pt = prevPt;
834 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
835 break;
836
837 default:
838 return; /* Should never happen */
839 }
840
841 //TRACE("Event: hwnd=%04x bar=%d msg=%x pt=%ld,%ld hit=%d\n",
842 // hwnd, nBar, msg, pt.x, pt.y, hittest );
843
844 switch(SCROLL_trackHitTest)
845 {
846 case SCROLL_NOWHERE: /* No tracking in progress */
847 break;
848
849 case SCROLL_TOP_ARROW:
850 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
851 (hittest == SCROLL_trackHitTest), FALSE );
852 if (hittest == SCROLL_trackHitTest)
853 {
854 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
855 {
856 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
857 SB_LINEUP, hwndCtl );
858 }
859 //CB: SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
860 // SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
861 // (TIMERPROC)0 );
862 }
863 //CB: else KillSystemTimer( hwnd, SCROLL_TIMER );
864 break;
865
866 case SCROLL_TOP_RECT:
867 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
868 thumbPos, infoPtr->flags, vertical,
869 (hittest == SCROLL_trackHitTest), FALSE );
870 if (hittest == SCROLL_trackHitTest)
871 {
872 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
873 {
874 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
875 SB_PAGEUP, hwndCtl );
876 //CB: SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
877 // SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
878 // (TIMERPROC)0 );
879 }
880 }
881 //CB: else KillSystemTimer( hwnd, SCROLL_TIMER );
882 break;
883
884 case SCROLL_THUMB:
885 if (msg == WM_LBUTTONDOWN)
886 {
887 SCROLL_TrackingWin = hwnd;
888 SCROLL_TrackingBar = nBar;
889 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
890 if (!SCROLL_MovingThumb)
891 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
892 }
893 else if (msg == WM_LBUTTONUP)
894 {
895 if (SCROLL_MovingThumb)
896 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
897 SCROLL_TrackingWin = 0;
898 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
899 thumbPos, infoPtr->flags, vertical,
900 FALSE, FALSE );
901 }
902 else /* WM_MOUSEMOVE */
903 {
904 UINT pos;
905
906 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
907 else
908 {
909 pt = SCROLL_ClipPos( &rect, pt );
910 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
911 }
912 if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
913 {
914 if (SCROLL_MovingThumb)
915 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
916 arrowSize, thumbSize );
917 lastMousePos = pos;
918 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
919 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
920 vertical,
921 SCROLL_TrackingPos );
922 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
923 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
924 hwndCtl );
925 if (!SCROLL_MovingThumb)
926 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
927 arrowSize, thumbSize );
928 }
929 }
930 break;
931
932 case SCROLL_BOTTOM_RECT:
933 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
934 thumbPos, infoPtr->flags, vertical,
935 FALSE, (hittest == SCROLL_trackHitTest) );
936 if (hittest == SCROLL_trackHitTest)
937 {
938 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
939 {
940 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
941 SB_PAGEDOWN, hwndCtl );
942 //CB: SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
943 // SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
944 // (TIMERPROC)0 );
945 }
946 }
947 //CB: else KillSystemTimer( hwnd, SCROLL_TIMER );
948 break;
949
950 case SCROLL_BOTTOM_ARROW:
951 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
952 FALSE, (hittest == SCROLL_trackHitTest) );
953 if (hittest == SCROLL_trackHitTest)
954 {
955 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
956 {
957 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
958 SB_LINEDOWN, hwndCtl );
959 }
960 //CB: SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
961 // SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
962 // (TIMERPROC)0 );
963 }
964 //CB: else KillSystemTimer( hwnd, SCROLL_TIMER );
965 break;
966 }
967
968 if (msg == WM_LBUTTONUP)
969 {
970 hittest = SCROLL_trackHitTest;
971 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
972
973 if (hittest == SCROLL_THUMB)
974 {
975 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
976 trackThumbPos + lastMousePos - lastClickPos );
977 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
978 MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl );
979 }
980 else
981 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
982 SB_ENDSCROLL, hwndCtl );
983 }
984
985 ReleaseDC( hwnd, hdc );
986}
987
988
989/***********************************************************************
990 * ScrollBarWndProc
991 */
992LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam,
993 LPARAM lParam )
994{
995 switch(message)
996 {
997 case WM_CREATE:
998 {
999 CREATESTRUCTA *lpCreat = (CREATESTRUCTA *)lParam;
1000 if (lpCreat->style & SBS_SIZEBOX)
1001 {
1002 //FIXME("Unimplemented style SBS_SIZEBOX.\n" );
1003 return 0;
1004 }
1005
1006 if (lpCreat->style & SBS_VERT)
1007 {
1008 if (lpCreat->style & SBS_LEFTALIGN)
1009 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1010 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1011 else if (lpCreat->style & SBS_RIGHTALIGN)
1012 MoveWindow( hwnd,
1013 lpCreat->x+lpCreat->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1014 lpCreat->y,
1015 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1016 }
1017 else /* SBS_HORZ */
1018 {
1019 if (lpCreat->style & SBS_TOPALIGN)
1020 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1021 lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1022 else if (lpCreat->style & SBS_BOTTOMALIGN)
1023 MoveWindow( hwnd,
1024 lpCreat->x,
1025 lpCreat->y+lpCreat->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1026 lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1027 }
1028 }
1029 if (!hUpArrow) SCROLL_LoadBitmaps();
1030 //TRACE("ScrollBar creation, hwnd=%04x\n", hwnd );
1031 return 0;
1032
1033 case WM_LBUTTONDOWN:
1034 case WM_LBUTTONUP:
1035 case WM_MOUSEMOVE:
1036 case WM_SYSTIMER:
1037 {
1038 POINT pt;
1039 CONV_POINT16TO32( (POINT16 *)&lParam, &pt );
1040 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1041 }
1042 break;
1043
1044 case WM_KEYDOWN:
1045 SCROLL_HandleKbdEvent( hwnd, wParam );
1046 break;
1047
1048 case WM_ERASEBKGND:
1049 return 1;
1050
1051 case WM_GETDLGCODE:
1052 return DLGC_WANTARROWS; /* Windows returns this value */
1053
1054 case WM_PAINT:
1055 {
1056 PAINTSTRUCT ps;
1057 HDC hdc = BeginPaint( hwnd, &ps );
1058 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1059 EndPaint( hwnd, &ps );
1060 }
1061 break;
1062
1063 case SBM_SETPOS:
1064 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1065
1066 case SBM_GETPOS:
1067 return GetScrollPos( hwnd, SB_CTL );
1068
1069 case SBM_SETRANGE:
1070 SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
1071 return 0; /* FIXME: return previous position */
1072
1073 case SBM_GETRANGE:
1074 GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
1075 return 0;
1076
1077 case SBM_ENABLE_ARROWS:
1078 return EnableScrollBar( hwnd, SB_CTL, wParam );
1079
1080 case SBM_SETRANGEREDRAW:
1081 SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
1082 return 0; /* FIXME: return previous position */
1083
1084 case SBM_SETSCROLLINFO:
1085 return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1086
1087 case SBM_GETSCROLLINFO:
1088 return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
1089
1090 case 0x00e5:
1091 case 0x00e7:
1092 case 0x00e8:
1093 case 0x00eb:
1094 case 0x00ec:
1095 case 0x00ed:
1096 case 0x00ee:
1097 case 0x00ef:
1098 //ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1099 // message, wParam, lParam );
1100 break;
1101
1102 default:
1103 if (message >= WM_USER)
1104 //WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1105 // message, wParam, lParam );
1106 return DefWindowProcA( hwnd, message, wParam, lParam );
1107 }
1108 return 0;
1109}
1110
1111
1112/*************************************************************************
1113 * SetScrollInfo32 (USER32.501)
1114 * SetScrollInfo32 can be used to set the position, upper bound,
1115 * lower bound, and page size of a scrollbar control.
1116 *
1117 * RETURNS
1118 * Scrollbar position
1119 *
1120 * NOTE
1121 * For 100 lines of text to be displayed in a window of 25 lines,
1122 * one would for instance use info->nMin=0, info->nMax=75
1123 * (corresponding to the 76 different positions of the window on
1124 * the text), and info->nPage=25.
1125 */
1126/* CB:
1127
1128INT WINAPI SetScrollInfo(
1129HWND hwnd / * [I] Handle of window whose scrollbar will be affected * /,
1130INT nBar / * [I] One of SB_HORZ, SB_VERT, or SB_CTL * /,
1131const SCROLLINFO *info / * [I] Specifies what to change and new values * /,
1132BOOL bRedraw / * [I] Should scrollbar be redrawn afterwards ? * /)
1133{
1134 INT action;
1135 INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1136
1137 if( action & SA_SSI_HIDE )
1138 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1139 else
1140 {
1141 if( action & SA_SSI_SHOW )
1142 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1143 return retVal; / * SetWindowPos() already did the painting * /
1144
1145 if( bRedraw && (action & SA_SSI_REFRESH))
1146 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1147 else if( action & SA_SSI_REPAINT_ARROWS )
1148 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1149 }
1150 return retVal;
1151} */
1152
1153INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1154 const SCROLLINFO *info, INT *action )
1155{
1156 /* Update the scrollbar state and set action flags according to
1157 * what has to be done graphics wise. */
1158
1159 SCROLLBAR_INFO *infoPtr;
1160 UINT new_flags;
1161
1162 //dbg_decl_str(scroll, 256);
1163
1164 *action = 0;
1165
1166 if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
1167 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1168 if ((info->cbSize != sizeof(*info)) &&
1169 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1170
1171 /* Set the page size */
1172
1173 if (info->fMask & SIF_PAGE)
1174 {
1175 //dsprintf(scroll, " page=%d", info->nPage );
1176 if( infoPtr->Page != info->nPage )
1177 {
1178 infoPtr->Page = info->nPage;
1179 *action |= SA_SSI_REFRESH;
1180 }
1181 }
1182
1183 /* Set the scroll pos */
1184
1185 if (info->fMask & SIF_POS)
1186 {
1187 //dsprintf(scroll, " pos=%d", info->nPos );
1188 if( infoPtr->CurVal != info->nPos )
1189 {
1190 infoPtr->CurVal = info->nPos;
1191 *action |= SA_SSI_REFRESH;
1192 }
1193 }
1194
1195 /* Set the scroll range */
1196
1197 if (info->fMask & SIF_RANGE)
1198 {
1199 //dsprintf(scroll, " min=%d max=%d", info->nMin, info->nMax );
1200
1201 /* Invalid range -> range is set to (0,0) */
1202 if ((info->nMin > info->nMax) ||
1203 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1204 {
1205 infoPtr->MinVal = 0;
1206 infoPtr->MaxVal = 0;
1207 }
1208 else
1209 {
1210 if( infoPtr->MinVal != info->nMin ||
1211 infoPtr->MaxVal != info->nMax )
1212 {
1213 *action |= SA_SSI_REFRESH;
1214 infoPtr->MinVal = info->nMin;
1215 infoPtr->MaxVal = info->nMax;
1216 }
1217 }
1218 }
1219
1220 //TRACE("hwnd=%04x bar=%d %s\n",
1221 // hwnd, nBar, dbg_str(scroll));
1222
1223 /* Make sure the page size is valid */
1224
1225 if (infoPtr->Page < 0) infoPtr->Page = 0;
1226 else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 )
1227 infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1;
1228
1229 /* Make sure the pos is inside the range */
1230
1231 if (infoPtr->CurVal < infoPtr->MinVal)
1232 infoPtr->CurVal = infoPtr->MinVal;
1233 else if (infoPtr->CurVal > infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1234 infoPtr->CurVal = infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 );
1235
1236 //TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1237 // infoPtr->Page, infoPtr->CurVal,
1238 // infoPtr->MinVal, infoPtr->MaxVal );
1239
1240 /* Check if the scrollbar should be hidden or disabled */
1241
1242 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1243 {
1244 new_flags = infoPtr->flags;
1245 if (infoPtr->MinVal >= infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1246 {
1247 /* Hide or disable scroll-bar */
1248 if (info->fMask & SIF_DISABLENOSCROLL)
1249 {
1250 new_flags = ESB_DISABLE_BOTH;
1251 *action |= SA_SSI_REFRESH;
1252 }
1253 else if (nBar != SB_CTL)
1254 {
1255 *action = SA_SSI_HIDE;
1256 goto done;
1257 }
1258 }
1259 else /* Show and enable scroll-bar */
1260 {
1261 new_flags = 0;
1262 if (nBar != SB_CTL)
1263 *action |= SA_SSI_SHOW;
1264 }
1265
1266 if (infoPtr->flags != new_flags) /* check arrow flags */
1267 {
1268 infoPtr->flags = new_flags;
1269 *action |= SA_SSI_REPAINT_ARROWS;
1270 }
1271 }
1272
1273done:
1274 /* Return current position */
1275
1276 return infoPtr->CurVal;
1277}
1278
1279
1280/*************************************************************************
1281 * GetScrollInfo32 (USER32.284)
1282 * GetScrollInfo32 can be used to retrieve the position, upper bound,
1283 * lower bound, and page size of a scrollbar control.
1284 *
1285 * RETURNS STD
1286 */
1287/* CB:
1288BOOL WINAPI GetScrollInfo(
1289 HWND hwnd / * [I] Handle of window * / ,
1290 INT nBar / * [I] One of SB_HORZ, SB_VERT, or SB_CTL * /,
1291 LPSCROLLINFO info / * [IO] (info.fMask [I] specifies which values are to retrieve) * /)
1292{
1293 SCROLLBAR_INFO *infoPtr;
1294
1295 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1296 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1297 if ((info->cbSize != sizeof(*info)) &&
1298 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1299
1300 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page;
1301 if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal;
1302 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1303 info->nTrackPos = (SCROLL_TrackingWin==hwnd) ? SCROLL_TrackingVal : infoPtr->CurVal;
1304 if (info->fMask & SIF_RANGE)
1305 {
1306 info->nMin = infoPtr->MinVal;
1307 info->nMax = infoPtr->MaxVal;
1308 }
1309 return (info->fMask & SIF_ALL) != 0;
1310} */
1311
1312
1313/*************************************************************************
1314 * SetScrollPos32 (USER32.502)
1315 *
1316 * RETURNS
1317 * Success: Scrollbar position
1318 * Failure: 0
1319 *
1320 * REMARKS
1321 * Note the ambiguity when 0 is returned. Use GetLastError
1322 * to make sure there was an error (and to know which one).
1323 */
1324/* CB:
1325INT WINAPI SetScrollPos(
1326HWND hwnd / * [I] Handle of window whose scrollbar will be affected * /,
1327INT nBar / * [I] One of SB_HORZ, SB_VERT, or SB_CTL * /,
1328INT nPos / * [I] New value * /,
1329BOOL bRedraw / * [I] Should scrollbar be redrawn afterwards ? * / )
1330{
1331 SCROLLINFO info;
1332 SCROLLBAR_INFO *infoPtr;
1333 INT oldPos;
1334
1335 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1336 oldPos = infoPtr->CurVal;
1337 info.cbSize = sizeof(info);
1338 info.nPos = nPos;
1339 info.fMask = SIF_POS;
1340 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1341 return oldPos;
1342} */
1343
1344
1345/*************************************************************************
1346 * GetScrollPos32 (USER32.285)
1347 *
1348 * RETURNS
1349 * Success: Current position
1350 * Failure: 0
1351 *
1352 * REMARKS
1353 * Note the ambiguity when 0 is returned. Use GetLastError
1354 * to make sure there was an error (and to know which one).
1355 */
1356/* CB:
1357INT WINAPI GetScrollPos(
1358HWND hwnd, / * [I] Handle of window * /
1359INT nBar / * [I] One of SB_HORZ, SB_VERT, or SB_CTL * /)
1360{
1361 SCROLLBAR_INFO *infoPtr;
1362
1363 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1364 return infoPtr->CurVal;
1365} */
1366
1367
1368/*************************************************************************
1369 * SetScrollRange32 (USER32.503)
1370 *
1371 * RETURNS STD
1372 */
1373/* CB:
1374BOOL WINAPI SetScrollRange(
1375HWND hwnd, / * [I] Handle of window whose scrollbar will be affected * /
1376INT nBar, / * [I] One of SB_HORZ, SB_VERT, or SB_CTL * /
1377INT MinVal, / * [I] New minimum value * /
1378INT MaxVal, / * [I] New maximum value * /
1379BOOL bRedraw / * [I] Should scrollbar be redrawn afterwards ? * /)
1380{
1381 SCROLLINFO info;
1382
1383 info.cbSize = sizeof(info);
1384 info.nMin = MinVal;
1385 info.nMax = MaxVal;
1386 info.fMask = SIF_RANGE;
1387 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1388 return TRUE;
1389} */
1390
1391
1392/*************************************************************************
1393 * SCROLL_SetNCSbState
1394 *
1395 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1396 */
1397INT SCROLL_SetNCSbState(HWND hwnd, int vMin, int vMax, int vPos,
1398 int hMin, int hMax, int hPos)
1399{
1400 INT vA, hA;
1401 SCROLLINFO vInfo, hInfo;
1402
1403 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1404 vInfo.nMin = vMin; hInfo.nMin = hMin;
1405 vInfo.nMax = vMax; hInfo.nMax = hMax;
1406 vInfo.nPos = vPos; hInfo.nPos = hPos;
1407 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1408
1409 SCROLL_SetScrollInfo( hwnd, SB_VERT, &vInfo, &vA );
1410 SCROLL_SetScrollInfo( hwnd, SB_HORZ, &hInfo, &hA );
1411
1412 if( !SCROLL_ShowScrollBar( hwnd, SB_BOTH,
1413 (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1414 {
1415 /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1416 if( vA & SA_SSI_REFRESH )
1417 SCROLL_RefreshScrollBar( hwnd, SB_VERT, FALSE, TRUE );
1418
1419 if( hA & SA_SSI_REFRESH )
1420 SCROLL_RefreshScrollBar( hwnd, SB_HORZ, FALSE, TRUE );
1421 }
1422 return 0;
1423}
1424
1425
1426/*************************************************************************
1427 * GetScrollRange32 (USER32.286)
1428 *
1429 * RETURNS STD
1430 */
1431/* CB:
1432BOOL WINAPI GetScrollRange(
1433HWND hwnd, / * [I] Handle of window * /
1434INT nBar, / * [I] One of SB_HORZ, SB_VERT, or SB_CTL * /
1435LPINT lpMin, / * [O] Where to store minimum value * /
1436LPINT lpMax / * [O] Where to store maximum value * /)
1437{
1438 SCROLLBAR_INFO *infoPtr;
1439
1440 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1441 {
1442 if (lpMin) lpMin = 0;
1443 if (lpMax) lpMax = 0;
1444 return FALSE;
1445 }
1446 if (lpMin) *lpMin = infoPtr->MinVal;
1447 if (lpMax) *lpMax = infoPtr->MaxVal;
1448 return TRUE;
1449}*/
1450
1451
1452/*************************************************************************
1453 * SCROLL_ShowScrollBar()
1454 *
1455 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1456 * NOTE: fShowV/fShowH must be zero when nBar is SB_HORZ/SB_VERT.
1457 */
1458BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1459 BOOL fShowH, BOOL fShowV )
1460{
1461 BOOL retvalue = FALSE;
1462 DWORD dwStyle = GetWindowLongA(hwnd,GWL_STYLE);
1463
1464 //TRACE("hwnd=%04x bar=%d horz=%d, vert=%d\n",
1465 // hwnd, nBar, fShowH, fShowV );
1466
1467 switch(nBar)
1468 {
1469 case SB_CTL:
1470 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1471 retvalue = TRUE;
1472 goto END;
1473
1474 case SB_BOTH:
1475 case SB_HORZ:
1476 if (fShowH)
1477 {
1478 fShowH = !(dwStyle & WS_HSCROLL);
1479 dwStyle |= WS_HSCROLL;
1480 }
1481 else /* hide it */
1482 {
1483 fShowH = (dwStyle & WS_HSCROLL);
1484 dwStyle &= ~WS_HSCROLL;
1485 }
1486 SetWindowLongA(hwnd,GWL_STYLE,dwStyle);
1487 if( nBar == SB_HORZ ) {
1488 fShowV = FALSE;
1489 break;
1490 }
1491 /* fall through */
1492
1493 case SB_VERT:
1494 if (fShowV)
1495 {
1496 fShowV = !(dwStyle & WS_VSCROLL);
1497 dwStyle |= WS_VSCROLL;
1498 }
1499 else /* hide it */
1500 {
1501 fShowV = (dwStyle & WS_VSCROLL);
1502 dwStyle &= ~WS_VSCROLL;
1503 }
1504 SetWindowLongA(hwnd,GWL_STYLE,dwStyle);
1505 if ( nBar == SB_VERT )
1506 fShowH = FALSE;
1507 break;
1508
1509 default:
1510 retvalue = FALSE; /* Nothing to do! */
1511 goto END;
1512 }
1513
1514 if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1515 {
1516 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1517 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1518 retvalue = TRUE;
1519 goto END;
1520 }
1521
1522 retvalue = FALSE; /* no frame changes */
1523END:
1524 return retvalue;
1525}
1526
1527
1528/*************************************************************************
1529 * ShowScrollBar32 (USER32.532)
1530 *
1531 * RETURNS STD
1532 */
1533/* CB:
1534BOOL WINAPI ShowScrollBar(
1535HWND hwnd, / * [I] Handle of window whose scrollbar(s) will be affected * /
1536INT nBar, / * [I] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL * /
1537BOOL fShow / * [I] TRUE = show, FALSE = hide * /)
1538{
1539 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1540 (nBar == SB_HORZ) ? 0 : fShow );
1541 return TRUE;
1542}*/
1543
1544
1545/*************************************************************************
1546 * EnableScrollBar32 (USER32.171)
1547 */
1548/* CB_
1549BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1550{
1551 BOOL bFineWithMe;
1552 SCROLLBAR_INFO *infoPtr;
1553
1554 //TRACE("%04x %d %d\n", hwnd, nBar, flags );
1555
1556 flags &= ESB_DISABLE_BOTH;
1557
1558 if (nBar == SB_BOTH)
1559 {
1560 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE;
1561 if (!(bFineWithMe = (infoPtr->flags == flags)) )
1562 {
1563 infoPtr->flags = flags;
1564 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1565 }
1566 nBar = SB_HORZ;
1567 }
1568 else
1569 bFineWithMe = TRUE;
1570
1571 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1572 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1573 infoPtr->flags = flags;
1574
1575 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1576 return TRUE;
1577}*/
1578
1579BOOL SCROLLBAR_Register()
1580{
1581 WNDCLASSA wndClass;
1582
1583 if (GlobalFindAtomA(SCROLLBARCLASSNAME)) return FALSE;
1584
1585 ZeroMemory(&wndClass,sizeof(WNDCLASSA));
1586 wndClass.style = CS_GLOBALCLASS | CS_HREDRAW | CS_VREDRAW | CS_PARENTDC;
1587 wndClass.lpfnWndProc = (WNDPROC)ScrollBarWndProc;
1588 wndClass.cbClsExtra = 0;
1589 wndClass.cbWndExtra = sizeof(SCROLLBAR_INFO);
1590 wndClass.hCursor = LoadCursorA(0,IDC_ARROWA);
1591 wndClass.hbrBackground = (HBRUSH)0;
1592 wndClass.lpszClassName = SCROLLBARCLASSNAME;
1593
1594 return RegisterClassA(&wndClass);
1595}
1596
1597
1598BOOL SCROLLBAR_Unregister()
1599{
1600 if (GlobalFindAtomA(SCROLLBARCLASSNAME))
1601 return UnregisterClassA(SCROLLBARCLASSNAME,(HINSTANCE)NULL);
1602 else return FALSE;
1603}
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