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When you hold the left mouse button inside the scrollbar, then move
[wine/multimedia.git] / controls / scroll.c
blobf5a4fc0ff0ad48712bbb750b6edb79aa85a6a399
1 /*
2 * Scrollbar control
3 *
4 * Copyright 1993 Martin Ayotte
5 * Copyright 1994, 1996 Alexandre Julliard
6 */
7
8 #include "windef.h"
9 #include "wingdi.h"
10 #include "wine/winuser16.h"
11 #include "controls.h"
12 #include "win.h"
13 #include "debugtools.h"
14 #include "user.h"
15
16 DEFAULT_DEBUG_CHANNEL(scroll);
17
18 typedef struct
19 {
20 INT CurVal; /* Current scroll-bar value */
21 INT MinVal; /* Minimum scroll-bar value */
22 INT MaxVal; /* Maximum scroll-bar value */
23 INT Page; /* Page size of scroll bar (Win32) */
24 UINT flags; /* EnableScrollBar flags */
25 } SCROLLBAR_INFO;
26
27
28 static HBITMAP hUpArrow;
29 static HBITMAP hDnArrow;
30 static HBITMAP hLfArrow;
31 static HBITMAP hRgArrow;
32 static HBITMAP hUpArrowD;
33 static HBITMAP hDnArrowD;
34 static HBITMAP hLfArrowD;
35 static HBITMAP hRgArrowD;
36 static HBITMAP hUpArrowI;
37 static HBITMAP hDnArrowI;
38 static HBITMAP hLfArrowI;
39 static HBITMAP hRgArrowI;
40
41 #define TOP_ARROW(flags,pressed) \
42 (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
43 #define BOTTOM_ARROW(flags,pressed) \
44 (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
45 #define LEFT_ARROW(flags,pressed) \
46 (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
47 #define RIGHT_ARROW(flags,pressed) \
48 (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
49
50
51 /* Minimum size of the rectangle between the arrows */
52 #define SCROLL_MIN_RECT 4
53
54 /* Minimum size of the thumb in pixels */
55 #define SCROLL_MIN_THUMB 6
56
57 /* Overlap between arrows and thumb */
58 #define SCROLL_ARROW_THUMB_OVERLAP ((TWEAK_WineLook == WIN31_LOOK) ? 1 : 0)
59
60 /* Delay (in ms) before first repetition when holding the button down */
61 #define SCROLL_FIRST_DELAY 200
62
63 /* Delay (in ms) between scroll repetitions */
64 #define SCROLL_REPEAT_DELAY 50
65
66 /* Scroll timer id */
67 #define SCROLL_TIMER 0
68
69 /* Scroll-bar hit testing */
70 enum SCROLL_HITTEST
71 {
72 SCROLL_NOWHERE, /* Outside the scroll bar */
73 SCROLL_TOP_ARROW, /* Top or left arrow */
74 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
75 SCROLL_THUMB, /* Thumb rectangle */
76 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
77 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
78 };
79
80 /* What to do after SCROLL_SetScrollInfo() */
81 #define SA_SSI_HIDE 0x0001
82 #define SA_SSI_SHOW 0x0002
83 #define SA_SSI_REFRESH 0x0004
84 #define SA_SSI_REPAINT_ARROWS 0x0008
85
86 /* Thumb-tracking info */
87 static HWND SCROLL_TrackingWin = 0;
88 static INT SCROLL_TrackingBar = 0;
89 static INT SCROLL_TrackingPos = 0;
90 static INT SCROLL_TrackingVal = 0;
91 /* Hit test code of the last button-down event */
92 static enum SCROLL_HITTEST SCROLL_trackHitTest;
93 static BOOL SCROLL_trackVertical;
94
95 /* Is the moving thumb being displayed? */
96 static BOOL SCROLL_MovingThumb = FALSE;
97
98 /* Local functions */
99 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
100 BOOL fShowH, BOOL fShowV );
101 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
102 const SCROLLINFO *info, INT *action );
103 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
104 RECT *rect, INT arrowSize,
105 INT thumbSize, INT thumbPos,
106 UINT flags, BOOL vertical,
107 BOOL top_selected, BOOL bottom_selected );
108 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
109
110
111 /*********************************************************************
112 * scrollbar class descriptor
113 */
114 const struct builtin_class_descr SCROLL_builtin_class =
115 {
116 "ScrollBar", /* name */
117 CS_GLOBALCLASS | CS_DBLCLKS | CS_VREDRAW | CS_HREDRAW | CS_PARENTDC, /* style */
118 NULL, /* procA (winproc is Unicode only) */
119 ScrollBarWndProc, /* procW */
120 sizeof(SCROLLBAR_INFO), /* extra */
121 IDC_ARROWA, /* cursor */
122 0 /* brush */
123 };
124
125
126 /***********************************************************************
127 * SCROLL_LoadBitmaps
128 */
129 static void SCROLL_LoadBitmaps(void)
130 {
131 hUpArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
132 hDnArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
133 hLfArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
134 hRgArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
135 hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
136 hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
137 hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
138 hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
139 hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
140 hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
141 hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
142 hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
143 }
144
145
146 /***********************************************************************
147 * SCROLL_GetScrollInfo
148 */
149 static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND hwnd, INT nBar )
150 {
151 SCROLLBAR_INFO *infoPtr;
152 WND *wndPtr = WIN_FindWndPtr( hwnd );
153
154 if (!wndPtr) return NULL;
155 switch(nBar)
156 {
157 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
158 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
159 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
160 default:
161 WIN_ReleaseWndPtr( wndPtr );
162 return NULL;
163 }
164
165 if (!infoPtr) /* Create the info structure if needed */
166 {
167 if ((infoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(SCROLLBAR_INFO) )))
168 {
169 infoPtr->MinVal = infoPtr->CurVal = infoPtr->Page = 0;
170 infoPtr->MaxVal = 100;
171 infoPtr->flags = ESB_ENABLE_BOTH;
172 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
173 else wndPtr->pVScroll = infoPtr;
174 }
175 if (!hUpArrow) SCROLL_LoadBitmaps();
176 }
177 WIN_ReleaseWndPtr( wndPtr );
178 return infoPtr;
179 }
180
181
182 /***********************************************************************
183 * SCROLL_GetScrollBarRect
184 *
185 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
186 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
187 * 'arrowSize' returns the width or height of an arrow (depending on
188 * the orientation of the scrollbar), 'thumbSize' returns the size of
189 * the thumb, and 'thumbPos' returns the position of the thumb
190 * relative to the left or to the top.
191 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
192 */
193 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
194 INT *arrowSize, INT *thumbSize,
195 INT *thumbPos )
196 {
197 INT pixels;
198 BOOL vertical;
199 WND *wndPtr = WIN_FindWndPtr( hwnd );
200
201 switch(nBar)
202 {
203 case SB_HORZ:
204 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left;
205 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
206 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left;
207 lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
208 if(wndPtr->dwStyle & WS_BORDER) {
209 lprect->left--;
210 lprect->right++;
211 } else if(wndPtr->dwStyle & WS_VSCROLL)
212 lprect->right++;
213 vertical = FALSE;
214 break;
215
216 case SB_VERT:
217 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
218 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top;
219 lprect->right = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
220 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
221 if(wndPtr->dwStyle & WS_BORDER) {
222 lprect->top--;
223 lprect->bottom++;
224 } else if(wndPtr->dwStyle & WS_HSCROLL)
225 lprect->bottom++;
226 vertical = TRUE;
227 break;
228
229 case SB_CTL:
230 GetClientRect( hwnd, lprect );
231 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
232 break;
233
234 default:
235 WIN_ReleaseWndPtr(wndPtr);
236 return FALSE;
237 }
238
239 if (vertical) pixels = lprect->bottom - lprect->top;
240 else pixels = lprect->right - lprect->left;
241
242 if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
243 {
244 if (pixels > SCROLL_MIN_RECT)
245 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
246 else
247 *arrowSize = 0;
248 *thumbPos = *thumbSize = 0;
249 }
250 else
251 {
252 SCROLLBAR_INFO *info = SCROLL_GetScrollInfo( hwnd, nBar );
253
254 *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
255 pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
256
257 if (info->Page)
258 {
259 *thumbSize = pixels * info->Page / (info->MaxVal-info->MinVal+1);
260 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
261 }
262 else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
263
264 if (((pixels -= *thumbSize ) < 0) ||
265 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
266 {
267 /* Rectangle too small or scrollbar disabled -> no thumb */
268 *thumbPos = *thumbSize = 0;
269 }
270 else
271 {
272 INT max = info->MaxVal - max( info->Page-1, 0 );
273 if (info->MinVal >= max)
274 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
275 else
276 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
277 + pixels * (info->CurVal-info->MinVal) / (max - info->MinVal);
278 }
279 }
280 WIN_ReleaseWndPtr(wndPtr);
281 return vertical;
282 }
283
284
285 /***********************************************************************
286 * SCROLL_GetThumbVal
287 *
288 * Compute the current scroll position based on the thumb position in pixels
289 * from the top of the scroll-bar.
290 */
291 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
292 BOOL vertical, INT pos )
293 {
294 INT thumbSize;
295 INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
296
297 if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
298 return infoPtr->MinVal;
299
300 if (infoPtr->Page)
301 {
302 thumbSize = pixels * infoPtr->Page/(infoPtr->MaxVal-infoPtr->MinVal+1);
303 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
304 }
305 else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
306
307 if ((pixels -= thumbSize) <= 0) return infoPtr->MinVal;
308
309 pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
310 if (pos > pixels) pos = pixels;
311
312 if (!infoPtr->Page) pos *= infoPtr->MaxVal - infoPtr->MinVal;
313 else pos *= infoPtr->MaxVal - infoPtr->MinVal - infoPtr->Page + 1;
314 return infoPtr->MinVal + ((pos + pixels / 2) / pixels);
315 }
316
317 /***********************************************************************
318 * SCROLL_PtInRectEx
319 */
320 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
321 {
322 RECT rect = *lpRect;
323
324 if (vertical)
325 {
326 rect.left -= lpRect->right - lpRect->left;
327 rect.right += lpRect->right - lpRect->left;
328 }
329 else
330 {
331 rect.top -= lpRect->bottom - lpRect->top;
332 rect.bottom += lpRect->bottom - lpRect->top;
333 }
334 return PtInRect( &rect, pt );
335 }
336
337 /***********************************************************************
338 * SCROLL_ClipPos
339 */
340 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
341 {
342 if( pt.x < lpRect->left )
343 pt.x = lpRect->left;
344 else
345 if( pt.x > lpRect->right )
346 pt.x = lpRect->right;
347
348 if( pt.y < lpRect->top )
349 pt.y = lpRect->top;
350 else
351 if( pt.y > lpRect->bottom )
352 pt.y = lpRect->bottom;
353
354 return pt;
355 }
356
357
358 /***********************************************************************
359 * SCROLL_HitTest
360 *
361 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
362 */
363 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
364 POINT pt, BOOL bDragging )
365 {
366 INT arrowSize, thumbSize, thumbPos;
367 RECT rect;
368
369 BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
370 &arrowSize, &thumbSize, &thumbPos );
371
372 if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
373 (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
374
375 if (vertical)
376 {
377 if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
378 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
379 if (!thumbPos) return SCROLL_TOP_RECT;
380 pt.y -= rect.top;
381 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
382 if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
383 }
384 else /* horizontal */
385 {
386 if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
387 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
388 if (!thumbPos) return SCROLL_TOP_RECT;
389 pt.x -= rect.left;
390 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
391 if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
392 }
393 return SCROLL_THUMB;
394 }
395
396
397 /***********************************************************************
398 * SCROLL_DrawArrows
399 *
400 * Draw the scroll bar arrows.
401 */
402 static void SCROLL_DrawArrows_9x( HDC hdc, SCROLLBAR_INFO *infoPtr,
403 RECT *rect, INT arrowSize, BOOL vertical,
404 BOOL top_pressed, BOOL bottom_pressed )
405 {
406 RECT r;
407
408 r = *rect;
409 if( vertical )
410 r.bottom = r.top + arrowSize;
411 else
412 r.right = r.left + arrowSize;
413
414 DrawFrameControl( hdc, &r, DFC_SCROLL,
415 (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
416 | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
417 | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
418
419 r = *rect;
420 if( vertical )
421 r.top = r.bottom-arrowSize;
422 else
423 r.left = r.right-arrowSize;
424
425 DrawFrameControl( hdc, &r, DFC_SCROLL,
426 (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
427 | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
428 | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
429 }
430
431 static void SCROLL_DrawArrows_31( HDC hdc, SCROLLBAR_INFO *infoPtr,
432 RECT *rect, INT arrowSize, BOOL vertical,
433 BOOL top_pressed, BOOL bottom_pressed )
434 {
435 HDC hdcMem = CreateCompatibleDC( hdc );
436 HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
437 TOP_ARROW(infoPtr->flags, top_pressed)
438 : LEFT_ARROW(infoPtr->flags, top_pressed));
439
440 SetStretchBltMode( hdc, STRETCH_DELETESCANS );
441 StretchBlt( hdc, rect->left, rect->top,
442 vertical ? rect->right-rect->left : arrowSize,
443 vertical ? arrowSize : rect->bottom-rect->top,
444 hdcMem, 0, 0,
445 GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
446 SRCCOPY );
447
448 SelectObject( hdcMem, vertical ?
449 BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
450 : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
451 if (vertical)
452 StretchBlt( hdc, rect->left, rect->bottom - arrowSize,
453 rect->right - rect->left, arrowSize,
454 hdcMem, 0, 0,
455 GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
456 SRCCOPY );
457 else
458 StretchBlt( hdc, rect->right - arrowSize, rect->top,
459 arrowSize, rect->bottom - rect->top,
460 hdcMem, 0, 0,
461 GetSystemMetrics(SM_CXVSCROLL), GetSystemMetrics(SM_CYHSCROLL),
462 SRCCOPY );
463 SelectObject( hdcMem, hbmpPrev );
464 DeleteDC( hdcMem );
465 }
466
467 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
468 RECT *rect, INT arrowSize, BOOL vertical,
469 BOOL top_pressed, BOOL bottom_pressed )
470 {
471 if( TWEAK_WineLook == WIN31_LOOK )
472 SCROLL_DrawArrows_31( hdc, infoPtr, rect, arrowSize,
473 vertical, top_pressed,bottom_pressed );
474 else
475 SCROLL_DrawArrows_9x( hdc, infoPtr, rect, arrowSize,
476 vertical, top_pressed,bottom_pressed );
477 }
478
479
480 /***********************************************************************
481 * SCROLL_DrawMovingThumb
482 *
483 * Draw the moving thumb rectangle.
484 */
485 static void SCROLL_DrawMovingThumb_31( HDC hdc, RECT *rect, BOOL vertical,
486 INT arrowSize, INT thumbSize )
487 {
488 RECT r = *rect;
489 if (vertical)
490 {
491 r.top += SCROLL_TrackingPos;
492 if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
493 r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
494 if (r.top + thumbSize >
495 rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
496 r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
497 - thumbSize;
498 r.bottom = r.top + thumbSize;
499 }
500 else
501 {
502 r.left += SCROLL_TrackingPos;
503 if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
504 r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
505 if (r.left + thumbSize >
506 rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
507 r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
508 - thumbSize;
509 r.right = r.left + thumbSize;
510 }
511
512 DrawFocusRect( hdc, &r );
513 SCROLL_MovingThumb = !SCROLL_MovingThumb;
514 }
515
516 static void SCROLL_DrawMovingThumb_9x( HDC hdc, RECT *rect, BOOL vertical,
517 INT arrowSize, INT thumbSize )
518 {
519 INT pos = SCROLL_TrackingPos;
520 INT max_size;
521
522 if( vertical )
523 max_size = rect->bottom - rect->top;
524 else
525 max_size = rect->right - rect->left;
526
527 max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
528
529 if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
530 pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
531 else if( pos > max_size )
532 pos = max_size;
533
534 SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
535 rect, arrowSize, thumbSize, pos,
536 0, vertical, FALSE, FALSE );
537
538 SCROLL_MovingThumb = !SCROLL_MovingThumb;
539 }
540
541 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
542 INT arrowSize, INT thumbSize )
543 {
544 if( TWEAK_WineLook == WIN31_LOOK )
545 SCROLL_DrawMovingThumb_31( hdc, rect, vertical, arrowSize, thumbSize );
546 else
547 SCROLL_DrawMovingThumb_9x( hdc, rect, vertical, arrowSize, thumbSize );
548 }
549
550 /***********************************************************************
551 * SCROLL_DrawInterior
552 *
553 * Draw the scroll bar interior (everything except the arrows).
554 */
555 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
556 RECT *rect, INT arrowSize,
557 INT thumbSize, INT thumbPos,
558 UINT flags, BOOL vertical,
559 BOOL top_selected, BOOL bottom_selected )
560 {
561 RECT r;
562 HPEN hSavePen;
563 HBRUSH hSaveBrush,hBrush;
564
565 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
566 * The window-owned scrollbars need to call DEFWND_ControlColor
567 * to correctly setup default scrollbar colors
568 */
569 if (nBar == SB_CTL)
570 {
571 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
572 (WPARAM)hdc,(LPARAM)hwnd);
573 }
574 else
575 {
576 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
577 }
578
579 hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
580 hSaveBrush = SelectObject( hdc, hBrush );
581
582 /* Calculate the scroll rectangle */
583 r = *rect;
584 if (vertical)
585 {
586 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
587 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
588 }
589 else
590 {
591 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
592 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
593 }
594
595 /* Draw the scroll rectangles and thumb */
596 if (!thumbPos) /* No thumb to draw */
597 {
598 PatBlt( hdc, r.left, r.top,
599 r.right - r.left, r.bottom - r.top,
600 PATCOPY );
601
602 /* cleanup and return */
603 SelectObject( hdc, hSavePen );
604 SelectObject( hdc, hSaveBrush );
605 return;
606 }
607
608 if (vertical)
609 {
610 PatBlt( hdc, r.left, r.top,
611 r.right - r.left,
612 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
613 top_selected ? 0x0f0000 : PATCOPY );
614 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
615 PatBlt( hdc, r.left, r.top + thumbSize,
616 r.right - r.left,
617 r.bottom - r.top - thumbSize,
618 bottom_selected ? 0x0f0000 : PATCOPY );
619 r.bottom = r.top + thumbSize;
620 }
621 else /* horizontal */
622 {
623 PatBlt( hdc, r.left, r.top,
624 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
625 r.bottom - r.top,
626 top_selected ? 0x0f0000 : PATCOPY );
627 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
628 PatBlt( hdc, r.left + thumbSize, r.top,
629 r.right - r.left - thumbSize,
630 r.bottom - r.top,
631 bottom_selected ? 0x0f0000 : PATCOPY );
632 r.right = r.left + thumbSize;
633 }
634
635 /* Draw the thumb */
636 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
637
638 /* cleanup */
639 SelectObject( hdc, hSavePen );
640 SelectObject( hdc, hSaveBrush );
641 }
642
643
644 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
645 RECT *rect, INT arrowSize,
646 INT thumbSize, INT thumbPos,
647 UINT flags, BOOL vertical,
648 BOOL top_selected, BOOL bottom_selected )
649 {
650 RECT r;
651 HPEN hSavePen;
652 HBRUSH hSaveBrush,hBrush;
653 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
654
655 if (Save_SCROLL_MovingThumb &&
656 (SCROLL_TrackingWin == hwnd) &&
657 (SCROLL_TrackingBar == nBar))
658 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
659
660 /* Select the correct brush and pen */
661
662 if (TWEAK_WineLook == WIN31_LOOK && (flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
663 {
664 /* This ought to be the color of the parent window */
665 hBrush = GetSysColorBrush(COLOR_WINDOW);
666 }
667 else
668 {
669 /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
670 * The window-owned scrollbars need to call DEFWND_ControlColor
671 * to correctly setup default scrollbar colors
672 */
673 if (nBar == SB_CTL) {
674 hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
675 (WPARAM)hdc,(LPARAM)hwnd);
676 } else {
677 hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
678 }
679 }
680 hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
681 hSaveBrush = SelectObject( hdc, hBrush );
682
683 /* Calculate the scroll rectangle */
684
685 r = *rect;
686 if (vertical)
687 {
688 r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
689 r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
690 }
691 else
692 {
693 r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
694 r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
695 }
696
697 /* Draw the scroll bar frame */
698
699 /* Only draw outline if Win 3.1. Mar 24, 1999 - Ronald B. Cemer */
700 if (TWEAK_WineLook == WIN31_LOOK)
701 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
702
703 /* Draw the scroll rectangles and thumb */
704
705 if (!thumbPos) /* No thumb to draw */
706 {
707 INT offset = (TWEAK_WineLook > WIN31_LOOK) ? 0 : 1;
708
709 PatBlt( hdc, r.left+offset, r.top+offset,
710 r.right - r.left - 2*offset, r.bottom - r.top - 2*offset,
711 PATCOPY );
712
713 /* cleanup and return */
714 SelectObject( hdc, hSavePen );
715 SelectObject( hdc, hSaveBrush );
716 return;
717 }
718
719 if (vertical)
720 {
721 INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
722
723 PatBlt( hdc, r.left + offset, r.top + offset,
724 r.right - r.left - offset*2,
725 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - offset,
726 top_selected ? 0x0f0000 : PATCOPY );
727 r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
728 PatBlt( hdc, r.left + offset, r.top + thumbSize,
729 r.right - r.left - offset*2,
730 r.bottom - r.top - thumbSize - offset,
731 bottom_selected ? 0x0f0000 : PATCOPY );
732 r.bottom = r.top + thumbSize;
733 }
734 else /* horizontal */
735 {
736 INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
737
738 PatBlt( hdc, r.left + offset, r.top + offset,
739 thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
740 r.bottom - r.top - offset*2,
741 top_selected ? 0x0f0000 : PATCOPY );
742 r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
743 PatBlt( hdc, r.left + thumbSize, r.top + offset,
744 r.right - r.left - thumbSize - offset,
745 r.bottom - r.top - offset*2,
746 bottom_selected ? 0x0f0000 : PATCOPY );
747 r.right = r.left + thumbSize;
748 }
749
750 /* Draw the thumb */
751
752 SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
753 if (TWEAK_WineLook == WIN31_LOOK)
754 {
755 Rectangle( hdc, r.left, r.top, r.right, r.bottom );
756 r.top++, r.left++;
757 }
758 else
759 {
760 Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
761 }
762 DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
763
764 if (Save_SCROLL_MovingThumb &&
765 (SCROLL_TrackingWin == hwnd) &&
766 (SCROLL_TrackingBar == nBar))
767 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
768
769 /* cleanup */
770 SelectObject( hdc, hSavePen );
771 SelectObject( hdc, hSaveBrush );
772 }
773
774
775 /***********************************************************************
776 * SCROLL_DrawScrollBar
777 *
778 * Redraw the whole scrollbar.
779 */
780 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
781 BOOL arrows, BOOL interior )
782 {
783 INT arrowSize, thumbSize, thumbPos;
784 RECT rect;
785 BOOL vertical;
786 WND *wndPtr = WIN_FindWndPtr( hwnd );
787 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
788 BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
789
790 if (!wndPtr || !infoPtr ||
791 ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
792 ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
793 if (!WIN_IsWindowDrawable( wndPtr, FALSE )) goto END;
794 hwnd = wndPtr->hwndSelf; /* make it a full handle */
795
796 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
797 &arrowSize, &thumbSize, &thumbPos );
798
799 /* do not draw if the scrollbar rectangle is empty */
800 if(IsRectEmpty(&rect))
801 goto END;
802
803 if (Save_SCROLL_MovingThumb &&
804 (SCROLL_TrackingWin == hwnd) &&
805 (SCROLL_TrackingBar == nBar))
806 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
807
808 /* Draw the arrows */
809
810 if (arrows && arrowSize)
811 {
812 if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
813 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
814 (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
815 (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
816 else
817 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
818 FALSE, FALSE );
819 }
820 if( interior )
821 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
822 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
823
824 if (Save_SCROLL_MovingThumb &&
825 (SCROLL_TrackingWin == hwnd) &&
826 (SCROLL_TrackingBar == nBar))
827 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
828
829 /* if scroll bar has focus, reposition the caret */
830 if(hwnd==GetFocus() && (nBar==SB_CTL))
831 {
832 if (!vertical)
833 {
834 SetCaretPos(thumbPos+1, rect.top+1);
835 }
836 else
837 {
838 SetCaretPos(rect.top+1, thumbPos+1);
839 }
840 }
841
842 END:
843 WIN_ReleaseWndPtr(wndPtr);
844 }
845
846
847 /***********************************************************************
848 * SCROLL_RefreshScrollBar
849 *
850 * Repaint the scroll bar interior after a SetScrollRange() or
851 * SetScrollPos() call.
852 */
853 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
854 BOOL arrows, BOOL interior )
855 {
856 HDC hdc = GetDCEx( hwnd, 0,
857 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
858 if (!hdc) return;
859
860 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
861 ReleaseDC( hwnd, hdc );
862 }
863
864
865 /***********************************************************************
866 * SCROLL_HandleKbdEvent
867 *
868 * Handle a keyboard event (only for SB_CTL scrollbars).
869 */
870 static void SCROLL_HandleKbdEvent( HWND hwnd, WPARAM wParam )
871 {
872 WPARAM msg;
873
874 switch(wParam)
875 {
876 case VK_PRIOR: msg = SB_PAGEUP; break;
877 case VK_NEXT: msg = SB_PAGEDOWN; break;
878 case VK_HOME: msg = SB_TOP; break;
879 case VK_END: msg = SB_BOTTOM; break;
880 case VK_UP: msg = SB_LINEUP; break;
881 case VK_DOWN: msg = SB_LINEDOWN; break;
882 default: return;
883 }
884 SendMessageW( GetParent(hwnd),
885 (GetWindowLongA( hwnd, GWL_STYLE ) & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
886 msg, hwnd );
887 }
888
889
890 /***********************************************************************
891 * SCROLL_HandleScrollEvent
892 *
893 * Handle a mouse or timer event for the scrollbar.
894 * 'pt' is the location of the mouse event in client (for SB_CTL) or
895 * windows coordinates.
896 */
897 void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
898 {
899 /* Previous mouse position for timer events */
900 static POINT prevPt;
901 /* Thumb position when tracking started. */
902 static UINT trackThumbPos;
903 /* Position in the scroll-bar of the last button-down event. */
904 static INT lastClickPos;
905 /* Position in the scroll-bar of the last mouse event. */
906 static INT lastMousePos;
907
908 enum SCROLL_HITTEST hittest;
909 HWND hwndOwner, hwndCtl;
910 BOOL vertical;
911 INT arrowSize, thumbSize, thumbPos;
912 RECT rect;
913 HDC hdc;
914
915 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
916 if (!infoPtr) return;
917 if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
918 return;
919
920 hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
921 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
922 &arrowSize, &thumbSize, &thumbPos );
923 hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
924 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
925
926 switch(msg)
927 {
928 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
929 HideCaret(hwnd); /* hide caret while holding down LBUTTON */
930 SCROLL_trackVertical = vertical;
931 SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
932 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
933 lastMousePos = lastClickPos;
934 trackThumbPos = thumbPos;
935 prevPt = pt;
936 SetCapture( hwnd );
937 if (nBar == SB_CTL && (GetWindowLongA(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
938 break;
939
940 case WM_MOUSEMOVE:
941 hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
942 prevPt = pt;
943 break;
944
945 case WM_LBUTTONUP:
946 hittest = SCROLL_NOWHERE;
947 ReleaseCapture();
948 /* if scrollbar has focus, show back caret */
949 if (hwnd==GetFocus()) ShowCaret(hwnd);
950 break;
951
952 case WM_SYSTIMER:
953 pt = prevPt;
954 hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
955 break;
956
957 default:
958 return; /* Should never happen */
959 }
960
961 TRACE("Event: hwnd=%04x bar=%d msg=%x pt=%ld,%ld hit=%d\n",
962 hwnd, nBar, msg, pt.x, pt.y, hittest );
963
964 switch(SCROLL_trackHitTest)
965 {
966 case SCROLL_NOWHERE: /* No tracking in progress */
967 break;
968
969 case SCROLL_TOP_ARROW:
970 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
971 (hittest == SCROLL_trackHitTest), FALSE );
972 if (hittest == SCROLL_trackHitTest)
973 {
974 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
975 {
976 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
977 SB_LINEUP, hwndCtl );
978 }
979
980 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
981 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
982 (TIMERPROC)0 );
983 }
984 else KillSystemTimer( hwnd, SCROLL_TIMER );
985 break;
986
987 case SCROLL_TOP_RECT:
988 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
989 thumbPos, infoPtr->flags, vertical,
990 (hittest == SCROLL_trackHitTest), FALSE );
991 if (hittest == SCROLL_trackHitTest)
992 {
993 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
994 {
995 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
996 SB_PAGEUP, hwndCtl );
997 }
998 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
999 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1000 (TIMERPROC)0 );
1001 }
1002 else KillSystemTimer( hwnd, SCROLL_TIMER );
1003 break;
1004
1005 case SCROLL_THUMB:
1006 if (msg == WM_LBUTTONDOWN)
1007 {
1008 SCROLL_TrackingWin = hwnd;
1009 SCROLL_TrackingBar = nBar;
1010 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
1011 if (!SCROLL_MovingThumb)
1012 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1013 }
1014 else if (msg == WM_LBUTTONUP)
1015 {
1016 if (SCROLL_MovingThumb)
1017 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1018 SCROLL_TrackingWin = 0;
1019 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1020 thumbPos, infoPtr->flags, vertical,
1021 FALSE, FALSE );
1022 }
1023 else /* WM_MOUSEMOVE */
1024 {
1025 UINT pos;
1026
1027 if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
1028 else
1029 {
1030 pt = SCROLL_ClipPos( &rect, pt );
1031 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
1032 }
1033 if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
1034 {
1035 if (SCROLL_MovingThumb)
1036 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1037 arrowSize, thumbSize );
1038 lastMousePos = pos;
1039 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
1040 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1041 vertical,
1042 SCROLL_TrackingPos );
1043 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1044 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1045 hwndCtl );
1046 if (!SCROLL_MovingThumb)
1047 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1048 arrowSize, thumbSize );
1049 }
1050 }
1051 break;
1052
1053 case SCROLL_BOTTOM_RECT:
1054 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1055 thumbPos, infoPtr->flags, vertical,
1056 FALSE, (hittest == SCROLL_trackHitTest) );
1057 if (hittest == SCROLL_trackHitTest)
1058 {
1059 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1060 {
1061 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1062 SB_PAGEDOWN, hwndCtl );
1063 }
1064 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1065 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1066 (TIMERPROC)0 );
1067 }
1068 else KillSystemTimer( hwnd, SCROLL_TIMER );
1069 break;
1070
1071 case SCROLL_BOTTOM_ARROW:
1072 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1073 FALSE, (hittest == SCROLL_trackHitTest) );
1074 if (hittest == SCROLL_trackHitTest)
1075 {
1076 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1077 {
1078 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1079 SB_LINEDOWN, hwndCtl );
1080 }
1081
1082 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1083 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1084 (TIMERPROC)0 );
1085 }
1086 else KillSystemTimer( hwnd, SCROLL_TIMER );
1087 break;
1088 }
1089
1090 if (msg == WM_LBUTTONUP)
1091 {
1092 hittest = SCROLL_trackHitTest;
1093 SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
1094
1095 if (hittest == SCROLL_THUMB)
1096 {
1097 UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1098 trackThumbPos + lastMousePos - lastClickPos );
1099 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1100 MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl );
1101 }
1102 else
1103 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1104 SB_ENDSCROLL, hwndCtl );
1105 }
1106
1107 ReleaseDC( hwnd, hdc );
1108 }
1109
1110
1111 /***********************************************************************
1112 * ScrollBarWndProc
1113 */
1114 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1115 {
1116 if (!IsWindow( hwnd )) return 0;
1117
1118 switch(message)
1119 {
1120 case WM_CREATE:
1121 {
1122 CREATESTRUCTW *lpCreat = (CREATESTRUCTW *)lParam;
1123 if (lpCreat->style & SBS_SIZEBOX)
1124 {
1125 FIXME("Unimplemented style SBS_SIZEBOX.\n" );
1126 return 0;
1127 }
1128 if (lpCreat->style & SBS_VERT)
1129 {
1130 if (lpCreat->style & SBS_LEFTALIGN)
1131 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1132 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1133 else if (lpCreat->style & SBS_RIGHTALIGN)
1134 MoveWindow( hwnd,
1135 lpCreat->x+lpCreat->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1136 lpCreat->y,
1137 GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1138 }
1139 else /* SBS_HORZ */
1140 {
1141 if (lpCreat->style & SBS_TOPALIGN)
1142 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1143 lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1144 else if (lpCreat->style & SBS_BOTTOMALIGN)
1145 MoveWindow( hwnd,
1146 lpCreat->x,
1147 lpCreat->y+lpCreat->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1148 lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1149 }
1150 }
1151 if (!hUpArrow) SCROLL_LoadBitmaps();
1152 TRACE("ScrollBar creation, hwnd=%04x\n", hwnd );
1153 return 0;
1154
1155 case WM_LBUTTONDOWN:
1156 case WM_LBUTTONUP:
1157 case WM_MOUSEMOVE:
1158 case WM_SYSTIMER:
1159 {
1160 POINT pt;
1161 pt.x = SLOWORD(lParam);
1162 pt.y = SHIWORD(lParam);
1163 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1164 }
1165 break;
1166
1167 /* if key event is received, the scrollbar has the focus */
1168 case WM_KEYDOWN:
1169 /* hide caret on first KEYDOWN to prevent flicker */
1170 if ((lParam & 0x40000000)==0)
1171 HideCaret(hwnd);
1172 SCROLL_HandleKbdEvent( hwnd, wParam );
1173 break;
1174
1175 case WM_KEYUP:
1176 ShowCaret(hwnd);
1177 break;
1178
1179 case WM_SETFOCUS:
1180 {
1181 /* Create a caret when a ScrollBar get focus */
1182 RECT rect;
1183 int arrowSize, thumbSize, thumbPos, vertical;
1184 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1185 &arrowSize, &thumbSize, &thumbPos );
1186 if (!vertical)
1187 {
1188 CreateCaret(hwnd,1, thumbSize-2, rect.bottom-rect.top-2);
1189 SetCaretPos(thumbPos+1, rect.top+1);
1190 }
1191 else
1192 {
1193 CreateCaret(hwnd,1, rect.right-rect.left-2,thumbSize-2);
1194 SetCaretPos(rect.top+1, thumbPos+1);
1195 }
1196 ShowCaret(hwnd);
1197 }
1198 break;
1199
1200 case WM_KILLFOCUS:
1201 {
1202 RECT rect;
1203 int arrowSize, thumbSize, thumbPos, vertical;
1204 vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1205 if (!vertical){
1206 rect.left=thumbPos+1;
1207 rect.right=rect.left+thumbSize;
1208 }
1209 else
1210 {
1211 rect.top=thumbPos+1;
1212 rect.bottom=rect.top+thumbSize;
1213 }
1214 HideCaret(hwnd);
1215 InvalidateRect(hwnd,&rect,0);
1216 DestroyCaret();
1217 }
1218 break;
1219
1220 case WM_ERASEBKGND:
1221 return 1;
1222
1223 case WM_GETDLGCODE:
1224 return DLGC_WANTARROWS; /* Windows returns this value */
1225
1226 case WM_PAINT:
1227 {
1228 PAINTSTRUCT ps;
1229 HDC hdc = BeginPaint( hwnd, &ps );
1230 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1231 EndPaint( hwnd, &ps );
1232 }
1233 break;
1234
1235 case SBM_SETPOS16:
1236 case SBM_SETPOS:
1237 return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1238
1239 case SBM_GETPOS16:
1240 case SBM_GETPOS:
1241 return GetScrollPos( hwnd, SB_CTL );
1242
1243 case SBM_SETRANGE16:
1244 SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
1245 wParam /* FIXME: Is this correct? */ );
1246 return 0;
1247
1248 case SBM_SETRANGE:
1249 {
1250 INT oldPos = GetScrollPos( hwnd, SB_CTL );
1251 SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
1252 if (oldPos != GetScrollPos( hwnd, SB_CTL )) return oldPos;
1253 }
1254 return 0;
1255
1256 case SBM_GETRANGE16:
1257 FIXME("don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
1258 return 0;
1259
1260 case SBM_GETRANGE:
1261 GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
1262 return 0;
1263
1264 case SBM_ENABLE_ARROWS16:
1265 case SBM_ENABLE_ARROWS:
1266 return EnableScrollBar( hwnd, SB_CTL, wParam );
1267
1268 case SBM_SETRANGEREDRAW:
1269 {
1270 INT oldPos = GetScrollPos( hwnd, SB_CTL );
1271 SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
1272 if (oldPos != GetScrollPos( hwnd, SB_CTL )) return oldPos;
1273 }
1274 return 0;
1275
1276 case SBM_SETSCROLLINFO:
1277 return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1278
1279 case SBM_GETSCROLLINFO:
1280 return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
1281
1282 case 0x00e5:
1283 case 0x00e7:
1284 case 0x00e8:
1285 case 0x00eb:
1286 case 0x00ec:
1287 case 0x00ed:
1288 case 0x00ee:
1289 case 0x00ef:
1290 ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1291 message, wParam, lParam );
1292 break;
1293
1294 default:
1295 if (message >= WM_USER)
1296 WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1297 message, wParam, lParam );
1298 return DefWindowProcW( hwnd, message, wParam, lParam );
1299 }
1300 return 0;
1301 }
1302
1303
1304 /*************************************************************************
1305 * SetScrollInfo (USER.475)
1306 */
1307 INT16 WINAPI SetScrollInfo16( HWND16 hwnd, INT16 nBar, const SCROLLINFO *info,
1308 BOOL16 bRedraw )
1309 {
1310 return (INT16)SetScrollInfo( hwnd, nBar, info, bRedraw );
1311 }
1312
1313
1314 /*************************************************************************
1315 * SetScrollInfo (USER32.@)
1316 * SetScrollInfo can be used to set the position, upper bound,
1317 * lower bound, and page size of a scrollbar control.
1318 *
1319 * RETURNS
1320 * Scrollbar position
1321 *
1322 * NOTE
1323 * For 100 lines of text to be displayed in a window of 25 lines,
1324 * one would for instance use info->nMin=0, info->nMax=75
1325 * (corresponding to the 76 different positions of the window on
1326 * the text), and info->nPage=25.
1327 */
1328 INT WINAPI SetScrollInfo(
1329 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1330 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1331 const SCROLLINFO *info /* [in] Specifies what to change and new values */,
1332 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1333 {
1334 INT action;
1335 INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1336
1337 if( action & SA_SSI_HIDE )
1338 SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1339 else
1340 {
1341 if( action & SA_SSI_SHOW )
1342 if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1343 return retVal; /* SetWindowPos() already did the painting */
1344
1345 if( bRedraw && (action & SA_SSI_REFRESH))
1346 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1347 else if( action & SA_SSI_REPAINT_ARROWS )
1348 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1349 }
1350 return retVal;
1351 }
1352
1353 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1354 const SCROLLINFO *info, INT *action )
1355 {
1356 /* Update the scrollbar state and set action flags according to
1357 * what has to be done graphics wise. */
1358
1359 SCROLLBAR_INFO *infoPtr;
1360 UINT new_flags;
1361 BOOL bChangeParams = FALSE; /* don't show/hide scrollbar if params don't change */
1362
1363 *action = 0;
1364
1365 if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
1366 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1367 if ((info->cbSize != sizeof(*info)) &&
1368 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1369
1370 if (TRACE_ON(scroll))
1371 {
1372 TRACE("hwnd=%04x bar=%d", hwnd, nBar);
1373 if (info->fMask & SIF_PAGE) DPRINTF( " page=%d", info->nPage );
1374 if (info->fMask & SIF_POS) DPRINTF( " pos=%d", info->nPos );
1375 if (info->fMask & SIF_RANGE) DPRINTF( " min=%d max=%d", info->nMin, info->nMax );
1376 DPRINTF("\n");
1377 }
1378
1379 /* Set the page size */
1380
1381 if (info->fMask & SIF_PAGE)
1382 {
1383 if( infoPtr->Page != info->nPage )
1384 {
1385 infoPtr->Page = info->nPage;
1386 *action |= SA_SSI_REFRESH;
1387 bChangeParams = TRUE;
1388 }
1389 }
1390
1391 /* Set the scroll pos */
1392
1393 if (info->fMask & SIF_POS)
1394 {
1395 if( infoPtr->CurVal != info->nPos )
1396 {
1397 infoPtr->CurVal = info->nPos;
1398 *action |= SA_SSI_REFRESH;
1399 }
1400 }
1401
1402 /* Set the scroll range */
1403
1404 if (info->fMask & SIF_RANGE)
1405 {
1406 /* Invalid range -> range is set to (0,0) */
1407 if ((info->nMin > info->nMax) ||
1408 ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1409 {
1410 infoPtr->MinVal = 0;
1411 infoPtr->MaxVal = 0;
1412 bChangeParams = TRUE;
1413 }
1414 else
1415 {
1416 if( infoPtr->MinVal != info->nMin ||
1417 infoPtr->MaxVal != info->nMax )
1418 {
1419 *action |= SA_SSI_REFRESH;
1420 infoPtr->MinVal = info->nMin;
1421 infoPtr->MaxVal = info->nMax;
1422 bChangeParams = TRUE;
1423 }
1424 }
1425 }
1426
1427 /* Make sure the page size is valid */
1428
1429 if (infoPtr->Page < 0) infoPtr->Page = 0;
1430 else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 )
1431 infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1;
1432
1433 /* Make sure the pos is inside the range */
1434
1435 if (infoPtr->CurVal < infoPtr->MinVal)
1436 infoPtr->CurVal = infoPtr->MinVal;
1437 else if (infoPtr->CurVal > infoPtr->MaxVal - max( infoPtr->Page-1, 0 ))
1438 infoPtr->CurVal = infoPtr->MaxVal - max( infoPtr->Page-1, 0 );
1439
1440 TRACE(" new values: page=%d pos=%d min=%d max=%d\n",
1441 infoPtr->Page, infoPtr->CurVal,
1442 infoPtr->MinVal, infoPtr->MaxVal );
1443
1444 /* don't change the scrollbar state if SetScrollInfo
1445 * is just called with SIF_DISABLENOSCROLL
1446 */
1447 if(!(info->fMask & SIF_ALL)) goto done;
1448
1449 /* Check if the scrollbar should be hidden or disabled */
1450
1451 if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1452 {
1453 new_flags = infoPtr->flags;
1454 if (infoPtr->MinVal >= infoPtr->MaxVal - max( infoPtr->Page-1, 0 ))
1455 {
1456 /* Hide or disable scroll-bar */
1457 if (info->fMask & SIF_DISABLENOSCROLL)
1458 {
1459 new_flags = ESB_DISABLE_BOTH;
1460 *action |= SA_SSI_REFRESH;
1461 }
1462 else if ((nBar != SB_CTL) && bChangeParams)
1463 {
1464 *action = SA_SSI_HIDE;
1465 goto done;
1466 }
1467 }
1468 else /* Show and enable scroll-bar */
1469 {
1470 new_flags = 0;
1471 if ((nBar != SB_CTL) && bChangeParams)
1472 *action |= SA_SSI_SHOW;
1473 }
1474
1475 if (infoPtr->flags != new_flags) /* check arrow flags */
1476 {
1477 infoPtr->flags = new_flags;
1478 *action |= SA_SSI_REPAINT_ARROWS;
1479 }
1480 }
1481
1482 done:
1483 /* Return current position */
1484
1485 return infoPtr->CurVal;
1486 }
1487
1488
1489 /*************************************************************************
1490 * GetScrollInfo (USER.476)
1491 */
1492 BOOL16 WINAPI GetScrollInfo16( HWND16 hwnd, INT16 nBar, LPSCROLLINFO info )
1493 {
1494 return GetScrollInfo( hwnd, nBar, info );
1495 }
1496
1497
1498 /*************************************************************************
1499 * GetScrollInfo (USER32.@)
1500 * GetScrollInfo can be used to retrieve the position, upper bound,
1501 * lower bound, and page size of a scrollbar control.
1502 *
1503 * RETURNS STD
1504 */
1505 BOOL WINAPI GetScrollInfo(
1506 HWND hwnd /* [in] Handle of window */ ,
1507 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1508 LPSCROLLINFO info /* [in/out] (info.fMask [in] specifies which values are to retrieve) */)
1509 {
1510 SCROLLBAR_INFO *infoPtr;
1511
1512 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1513 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1514 if ((info->cbSize != sizeof(*info)) &&
1515 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1516
1517 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page;
1518 if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal;
1519 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1520 info->nTrackPos = (SCROLL_TrackingWin == WIN_GetFullHandle(hwnd)) ? SCROLL_TrackingVal : infoPtr->CurVal;
1521 if (info->fMask & SIF_RANGE)
1522 {
1523 info->nMin = infoPtr->MinVal;
1524 info->nMax = infoPtr->MaxVal;
1525 }
1526 return (info->fMask & SIF_ALL) != 0;
1527 }
1528
1529
1530 /*************************************************************************
1531 * SetScrollPos (USER.62)
1532 */
1533 INT16 WINAPI SetScrollPos16( HWND16 hwnd, INT16 nBar, INT16 nPos,
1534 BOOL16 bRedraw )
1535 {
1536 return (INT16)SetScrollPos( hwnd, nBar, nPos, bRedraw );
1537 }
1538
1539
1540 /*************************************************************************
1541 * SetScrollPos (USER32.@)
1542 *
1543 * RETURNS
1544 * Success: Scrollbar position
1545 * Failure: 0
1546 *
1547 * REMARKS
1548 * Note the ambiguity when 0 is returned. Use GetLastError
1549 * to make sure there was an error (and to know which one).
1550 */
1551 INT WINAPI SetScrollPos(
1552 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1553 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1554 INT nPos /* [in] New value */,
1555 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */ )
1556 {
1557 SCROLLINFO info;
1558 SCROLLBAR_INFO *infoPtr;
1559 INT oldPos;
1560
1561 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1562 oldPos = infoPtr->CurVal;
1563 info.cbSize = sizeof(info);
1564 info.nPos = nPos;
1565 info.fMask = SIF_POS;
1566 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1567 return oldPos;
1568 }
1569
1570
1571 /*************************************************************************
1572 * GetScrollPos (USER.63)
1573 */
1574 INT16 WINAPI GetScrollPos16( HWND16 hwnd, INT16 nBar )
1575 {
1576 return (INT16)GetScrollPos( hwnd, nBar );
1577 }
1578
1579
1580 /*************************************************************************
1581 * GetScrollPos (USER32.@)
1582 *
1583 * RETURNS
1584 * Success: Current position
1585 * Failure: 0
1586 *
1587 * REMARKS
1588 * Note the ambiguity when 0 is returned. Use GetLastError
1589 * to make sure there was an error (and to know which one).
1590 */
1591 INT WINAPI GetScrollPos(
1592 HWND hwnd, /* [in] Handle of window */
1593 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1594 {
1595 SCROLLBAR_INFO *infoPtr;
1596
1597 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1598 return infoPtr->CurVal;
1599 }
1600
1601
1602 /*************************************************************************
1603 * SetScrollRange (USER.64)
1604 */
1605 void WINAPI SetScrollRange16( HWND16 hwnd, INT16 nBar,
1606 INT16 MinVal, INT16 MaxVal, BOOL16 bRedraw )
1607 {
1608 /* Invalid range -> range is set to (0,0) */
1609 if ((INT)MaxVal - (INT)MinVal > 0x7fff) MinVal = MaxVal = 0;
1610 SetScrollRange( hwnd, nBar, MinVal, MaxVal, bRedraw );
1611 }
1612
1613
1614 /*************************************************************************
1615 * SetScrollRange (USER32.@)
1616 *
1617 * RETURNS STD
1618 */
1619 BOOL WINAPI SetScrollRange(
1620 HWND hwnd, /* [in] Handle of window whose scrollbar will be affected */
1621 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1622 INT MinVal, /* [in] New minimum value */
1623 INT MaxVal, /* [in] New maximum value */
1624 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1625 {
1626 SCROLLINFO info;
1627
1628 info.cbSize = sizeof(info);
1629 info.nMin = MinVal;
1630 info.nMax = MaxVal;
1631 info.fMask = SIF_RANGE;
1632 SetScrollInfo( hwnd, nBar, &info, bRedraw );
1633 return TRUE;
1634 }
1635
1636
1637 /*************************************************************************
1638 * SCROLL_SetNCSbState
1639 *
1640 * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1641 */
1642 INT SCROLL_SetNCSbState(HWND hwnd, int vMin, int vMax, int vPos,
1643 int hMin, int hMax, int hPos)
1644 {
1645 INT vA, hA;
1646 SCROLLINFO vInfo, hInfo;
1647
1648 vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1649 vInfo.nMin = vMin;
1650 vInfo.nMax = vMax;
1651 vInfo.nPos = vPos;
1652 hInfo.nMin = hMin;
1653 hInfo.nMax = hMax;
1654 hInfo.nPos = hPos;
1655 vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS;
1656
1657 SCROLL_SetScrollInfo( hwnd, SB_VERT, &vInfo, &vA );
1658 SCROLL_SetScrollInfo( hwnd, SB_HORZ, &hInfo, &hA );
1659
1660 if( !SCROLL_ShowScrollBar( hwnd, SB_BOTH,
1661 (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1662 {
1663 /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1664 if( vA & SA_SSI_REFRESH )
1665 SCROLL_RefreshScrollBar( hwnd, SB_VERT, FALSE, TRUE );
1666
1667 if( hA & SA_SSI_REFRESH )
1668 SCROLL_RefreshScrollBar( hwnd, SB_HORZ, FALSE, TRUE );
1669 }
1670 return 0;
1671 }
1672
1673
1674 /*************************************************************************
1675 * GetScrollRange (USER.65)
1676 */
1677 BOOL16 WINAPI GetScrollRange16( HWND16 hwnd, INT16 nBar,
1678 LPINT16 lpMin, LPINT16 lpMax)
1679 {
1680 INT min, max;
1681 BOOL16 ret = GetScrollRange( hwnd, nBar, &min, &max );
1682 if (lpMin) *lpMin = min;
1683 if (lpMax) *lpMax = max;
1684 return ret;
1685 }
1686
1687
1688 /*************************************************************************
1689 * GetScrollRange (USER32.@)
1690 *
1691 * RETURNS STD
1692 */
1693 BOOL WINAPI GetScrollRange(
1694 HWND hwnd, /* [in] Handle of window */
1695 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1696 LPINT lpMin, /* [out] Where to store minimum value */
1697 LPINT lpMax /* [out] Where to store maximum value */)
1698 {
1699 SCROLLBAR_INFO *infoPtr;
1700
1701 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1702 {
1703 if (lpMin) lpMin = 0;
1704 if (lpMax) lpMax = 0;
1705 return FALSE;
1706 }
1707 if (lpMin) *lpMin = infoPtr->MinVal;
1708 if (lpMax) *lpMax = infoPtr->MaxVal;
1709 return TRUE;
1710 }
1711
1712
1713 /*************************************************************************
1714 * SCROLL_ShowScrollBar()
1715 *
1716 * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1717 */
1718 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1719 BOOL fShowH, BOOL fShowV )
1720 {
1721 WND *wndPtr = WIN_FindWndPtr( hwnd );
1722 BOOL retvalue = FALSE;
1723
1724 if (!wndPtr) return FALSE;
1725 TRACE("hwnd=%04x bar=%d horz=%d, vert=%d\n",
1726 hwnd, nBar, fShowH, fShowV );
1727
1728 switch(nBar)
1729 {
1730 case SB_CTL:
1731 ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1732 retvalue = TRUE;
1733 goto END;
1734
1735 case SB_BOTH:
1736 case SB_HORZ:
1737 if (fShowH)
1738 {
1739 fShowH = !(wndPtr->dwStyle & WS_HSCROLL);
1740 wndPtr->dwStyle |= WS_HSCROLL;
1741 }
1742 else /* hide it */
1743 {
1744 fShowH = (wndPtr->dwStyle & WS_HSCROLL);
1745 wndPtr->dwStyle &= ~WS_HSCROLL;
1746 }
1747 if( nBar == SB_HORZ ) {
1748 fShowV = FALSE;
1749 break;
1750 }
1751 /* fall through */
1752
1753 case SB_VERT:
1754 if (fShowV)
1755 {
1756 fShowV = !(wndPtr->dwStyle & WS_VSCROLL);
1757 wndPtr->dwStyle |= WS_VSCROLL;
1758 }
1759 else /* hide it */
1760 {
1761 fShowV = (wndPtr->dwStyle & WS_VSCROLL);
1762 wndPtr->dwStyle &= ~WS_VSCROLL;
1763 }
1764 if ( nBar == SB_VERT )
1765 fShowH = FALSE;
1766 break;
1767
1768 default:
1769 retvalue = FALSE; /* Nothing to do! */
1770 goto END;
1771 }
1772
1773 if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1774 {
1775 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1776 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1777 retvalue = TRUE;
1778 goto END;
1779 }
1780
1781 retvalue = FALSE; /* no frame changes */
1782 END:
1783 WIN_ReleaseWndPtr(wndPtr);
1784 return retvalue;
1785 }
1786
1787
1788 /*************************************************************************
1789 * ShowScrollBar (USER.267)
1790 */
1791 void WINAPI ShowScrollBar16( HWND16 hwnd, INT16 nBar, BOOL16 fShow )
1792 {
1793 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1794 (nBar == SB_HORZ) ? 0 : fShow );
1795 }
1796
1797
1798 /*************************************************************************
1799 * ShowScrollBar (USER32.@)
1800 *
1801 * RETURNS STD
1802 */
1803 BOOL WINAPI ShowScrollBar(
1804 HWND hwnd, /* [in] Handle of window whose scrollbar(s) will be affected */
1805 INT nBar, /* [in] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1806 BOOL fShow /* [in] TRUE = show, FALSE = hide */)
1807 {
1808 SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1809 (nBar == SB_HORZ) ? 0 : fShow );
1810 return TRUE;
1811 }
1812
1813
1814 /*************************************************************************
1815 * EnableScrollBar (USER.482)
1816 */
1817 BOOL16 WINAPI EnableScrollBar16( HWND16 hwnd, INT16 nBar, UINT16 flags )
1818 {
1819 return EnableScrollBar( hwnd, nBar, flags );
1820 }
1821
1822
1823 /*************************************************************************
1824 * EnableScrollBar (USER32.@)
1825 */
1826 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1827 {
1828 BOOL bFineWithMe;
1829 SCROLLBAR_INFO *infoPtr;
1830
1831 TRACE("%04x %d %d\n", hwnd, nBar, flags );
1832
1833 flags &= ESB_DISABLE_BOTH;
1834
1835 if (nBar == SB_BOTH)
1836 {
1837 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE;
1838 if (!(bFineWithMe = (infoPtr->flags == flags)) )
1839 {
1840 infoPtr->flags = flags;
1841 SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1842 }
1843 nBar = SB_HORZ;
1844 }
1845 else
1846 bFineWithMe = TRUE;
1847
1848 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1849 if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1850 infoPtr->flags = flags;
1851
1852 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1853 return TRUE;
1854 }
Maarten's multimedia branch