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Release 961222
[wine/gsoc-2012-control.git] / controls / scroll.c
blobea04e38f8340c993e31b4a36a1c262cbc06ba72a
1 /*
2 * Scrollbar control
3 *
4 * Copyright 1993 Martin Ayotte
5 * Copyright 1994, 1996 Alexandre Julliard
6 */
7
8 #define NO_TRANSITION_TYPES /* This file is Win32-clean */
9 #include <stdlib.h>
10 #include <stdio.h>
11 #include <sys/types.h>
12 #include <sys/stat.h>
13 #include "windows.h"
14 #include "syscolor.h"
15 #include "sysmetrics.h"
16 #include "scroll.h"
17 #include "graphics.h"
18 #include "heap.h"
19 #include "win.h"
20 #include "stddebug.h"
21 #include "debug.h"
22
23
24 static HBITMAP32 hUpArrow = 0;
25 static HBITMAP32 hDnArrow = 0;
26 static HBITMAP32 hLfArrow = 0;
27 static HBITMAP32 hRgArrow = 0;
28 static HBITMAP32 hUpArrowD = 0;
29 static HBITMAP32 hDnArrowD = 0;
30 static HBITMAP32 hLfArrowD = 0;
31 static HBITMAP32 hRgArrowD = 0;
32 static HBITMAP32 hUpArrowI = 0;
33 static HBITMAP32 hDnArrowI = 0;
34 static HBITMAP32 hLfArrowI = 0;
35 static HBITMAP32 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 /* Delay (in ms) before first repetition when holding the button down */
54 #define SCROLL_FIRST_DELAY 200
55
56 /* Delay (in ms) between scroll repetitions */
57 #define SCROLL_REPEAT_DELAY 50
58
59 /* Scroll timer id */
60 #define SCROLL_TIMER 0
61
62 /* Scroll-bar hit testing */
63 enum SCROLL_HITTEST
64 {
65 SCROLL_NOWHERE, /* Outside the scroll bar */
66 SCROLL_TOP_ARROW, /* Top or left arrow */
67 SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
68 SCROLL_THUMB, /* Thumb rectangle */
69 SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
70 SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
71 };
72
73 /* Thumb-tracking info */
74 static HWND32 SCROLL_TrackingWin = 0;
75 static INT32 SCROLL_TrackingBar = 0;
76 static INT32 SCROLL_TrackingPos = 0;
77 static INT32 SCROLL_TrackingVal = 0;
78
79 /* Is the moving thumb being displayed? */
80 static BOOL32 SCROLL_MovingThumb = FALSE;
81
82 /***********************************************************************
83 * SCROLL_LoadBitmaps
84 */
85 static void SCROLL_LoadBitmaps(void)
86 {
87 hUpArrow = LoadBitmap16( 0, MAKEINTRESOURCE(OBM_UPARROW) );
88 hDnArrow = LoadBitmap16( 0, MAKEINTRESOURCE(OBM_DNARROW) );
89 hLfArrow = LoadBitmap16( 0, MAKEINTRESOURCE(OBM_LFARROW) );
90 hRgArrow = LoadBitmap16( 0, MAKEINTRESOURCE(OBM_RGARROW) );
91 hUpArrowD = LoadBitmap16( 0, MAKEINTRESOURCE(OBM_UPARROWD) );
92 hDnArrowD = LoadBitmap16( 0, MAKEINTRESOURCE(OBM_DNARROWD) );
93 hLfArrowD = LoadBitmap16( 0, MAKEINTRESOURCE(OBM_LFARROWD) );
94 hRgArrowD = LoadBitmap16( 0, MAKEINTRESOURCE(OBM_RGARROWD) );
95 hUpArrowI = LoadBitmap16( 0, MAKEINTRESOURCE(OBM_UPARROWI) );
96 hDnArrowI = LoadBitmap16( 0, MAKEINTRESOURCE(OBM_DNARROWI) );
97 hLfArrowI = LoadBitmap16( 0, MAKEINTRESOURCE(OBM_LFARROWI) );
98 hRgArrowI = LoadBitmap16( 0, MAKEINTRESOURCE(OBM_RGARROWI) );
99 }
100
101
102 /***********************************************************************
103 * SCROLL_GetPtrScrollInfo
104 */
105 static SCROLLBAR_INFO *SCROLL_GetPtrScrollInfo( WND* wndPtr, INT32 nBar )
106 {
107 SCROLLBAR_INFO *infoPtr;
108
109 if (!wndPtr) return NULL;
110 switch(nBar)
111 {
112 case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
113 case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
114 case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
115 default: return NULL;
116 }
117
118 if (!infoPtr) /* Create the info structure if needed */
119 {
120 if ((infoPtr = HeapAlloc( SystemHeap, 0, sizeof(SCROLLBAR_INFO) )))
121 {
122 infoPtr->MinVal = infoPtr->CurVal = infoPtr->Page = 0;
123 infoPtr->MaxVal = 100;
124 infoPtr->flags = ESB_ENABLE_BOTH;
125 if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
126 else wndPtr->pVScroll = infoPtr;
127 }
128 if (!hUpArrow) SCROLL_LoadBitmaps();
129 }
130 return infoPtr;
131 }
132
133
134 /***********************************************************************
135 * SCROLL_GetScrollInfo
136 */
137 static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND32 hwnd, INT32 nBar )
138 {
139 WND *wndPtr = WIN_FindWndPtr( hwnd );
140 return SCROLL_GetPtrScrollInfo( wndPtr, nBar );
141 }
142
143
144 /***********************************************************************
145 * SCROLL_GetScrollBarRect
146 *
147 * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
148 * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
149 * 'arrowSize' returns the width or height of an arrow (depending on
150 * the orientation of the scrollbar), 'thumbSize' returns the size of
151 * the thumb, and 'thumbPos' returns the position of the thumb
152 * relative to the left or to the top.
153 * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
154 */
155 static BOOL32 SCROLL_GetScrollBarRect( HWND32 hwnd, INT32 nBar, RECT32 *lprect,
156 INT32 *arrowSize, INT32 *thumbSize,
157 INT32 *thumbPos )
158 {
159 INT32 pixels;
160 BOOL32 vertical;
161 WND *wndPtr = WIN_FindWndPtr( hwnd );
162
163 switch(nBar)
164 {
165 case SB_HORZ:
166 lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left - 1;
167 lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
168 lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left +1;
169 lprect->bottom = lprect->top + SYSMETRICS_CYHSCROLL + 1;
170 vertical = FALSE;
171 break;
172
173 case SB_VERT:
174 lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left;
175 lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top - 1;
176 lprect->right = lprect->left + SYSMETRICS_CXVSCROLL + 1;
177 lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top +1;
178 vertical = TRUE;
179 break;
180
181 case SB_CTL:
182 GetClientRect32( hwnd, lprect );
183 vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
184 break;
185
186 default:
187 return FALSE;
188 }
189
190 if (vertical) pixels = lprect->bottom - lprect->top;
191 else pixels = lprect->right - lprect->left;
192
193 if (pixels <= 2*SYSMETRICS_CXVSCROLL + SCROLL_MIN_RECT)
194 {
195 if (pixels > SCROLL_MIN_RECT)
196 *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
197 else
198 *arrowSize = 0;
199 *thumbPos = *thumbSize = 0;
200 }
201 else
202 {
203 SCROLLBAR_INFO *info = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
204
205 *arrowSize = SYSMETRICS_CXVSCROLL;
206 pixels -= 2 * SYSMETRICS_CXVSCROLL;
207
208 if (info->Page)
209 {
210 *thumbSize = pixels * info->Page / (info->MaxVal-info->MinVal+1);
211 if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
212 }
213 else *thumbSize = SYSMETRICS_CXVSCROLL;
214
215 if (((pixels -= *thumbSize + 1) < 0) ||
216 ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
217 {
218 /* Rectangle too small or scrollbar disabled -> no thumb */
219 *thumbPos = *thumbSize = 0;
220 }
221 else
222 {
223 INT32 max = info->MaxVal - MAX( info->Page-1, 0 );
224 if (info->MinVal >= max)
225 *thumbPos = *arrowSize;
226 else
227 *thumbPos = *arrowSize + pixels * (info->CurVal-info->MinVal) /
228 (max - info->MinVal);
229 }
230 }
231 return vertical;
232 }
233
234
235 /***********************************************************************
236 * SCROLL_GetThumbVal
237 *
238 * Compute the current scroll position based on the thumb position in pixels
239 * from the top of the scroll-bar.
240 */
241 static UINT32 SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT32 *rect,
242 BOOL32 vertical, INT32 pos )
243 {
244 INT32 thumbSize;
245 INT32 pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
246
247 if ((pixels -= 2*SYSMETRICS_CXVSCROLL) <= 0) return infoPtr->MinVal;
248
249 if (infoPtr->Page)
250 {
251 thumbSize = pixels * infoPtr->Page/(infoPtr->MaxVal-infoPtr->MinVal+1);
252 if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
253 }
254 else thumbSize = SYSMETRICS_CXVSCROLL;
255
256 if ((pixels -= thumbSize + 1) <= 0) return infoPtr->MinVal;
257
258 pos = MAX( 0, pos - SYSMETRICS_CXVSCROLL );
259 if (pos > pixels) pos = pixels;
260
261 if (!infoPtr->Page) pos *= infoPtr->MaxVal - infoPtr->MinVal;
262 else pos *= infoPtr->MaxVal - infoPtr->MinVal - infoPtr->Page + 1;
263 return infoPtr->MinVal + ((pos + pixels / 2) / pixels);
264 }
265
266
267 /***********************************************************************
268 * SCROLL_HitTest
269 *
270 * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
271 */
272 static enum SCROLL_HITTEST SCROLL_HitTest( HWND32 hwnd, INT32 nBar,
273 POINT32 pt )
274 {
275 INT32 arrowSize, thumbSize, thumbPos;
276 RECT32 rect;
277
278 BOOL32 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
279 &arrowSize, &thumbSize, &thumbPos );
280 if (!PtInRect32( &rect, pt )) return SCROLL_NOWHERE;
281
282 if (vertical)
283 {
284 if (pt.y <= rect.top + arrowSize + 1) return SCROLL_TOP_ARROW;
285 if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
286 if (!thumbPos) return SCROLL_TOP_RECT;
287 pt.y -= rect.top;
288 if (pt.y < thumbPos) return SCROLL_TOP_RECT;
289 if (pt.y > thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
290 return SCROLL_THUMB;
291 }
292 else /* horizontal */
293 {
294 if (pt.x <= rect.left + arrowSize) return SCROLL_TOP_ARROW;
295 if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
296 if (!thumbPos) return SCROLL_TOP_RECT;
297 pt.x -= rect.left;
298 if (pt.x < thumbPos) return SCROLL_TOP_RECT;
299 if (pt.x > thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
300 return SCROLL_THUMB;
301 }
302 }
303
304
305 /***********************************************************************
306 * SCROLL_DrawArrows
307 *
308 * Draw the scroll bar arrows.
309 */
310 static void SCROLL_DrawArrows( HDC32 hdc, SCROLLBAR_INFO *infoPtr,
311 RECT32 *rect, INT32 arrowSize, BOOL32 vertical,
312 BOOL32 top_pressed, BOOL32 bottom_pressed )
313 {
314 HDC32 hdcMem = CreateCompatibleDC32( hdc );
315 HBITMAP32 hbmpPrev = SelectObject32( hdcMem, vertical ?
316 TOP_ARROW(infoPtr->flags, top_pressed)
317 : LEFT_ARROW(infoPtr->flags, top_pressed));
318 SetStretchBltMode32( hdc, STRETCH_DELETESCANS );
319 StretchBlt32( hdc, rect->left, rect->top,
320 vertical ? rect->right-rect->left : arrowSize+1,
321 vertical ? arrowSize+1 : rect->bottom-rect->top,
322 hdcMem, 0, 0,
323 SYSMETRICS_CXVSCROLL + 1, SYSMETRICS_CYHSCROLL + 1,
324 SRCCOPY );
325
326 SelectObject32( hdcMem, vertical ?
327 BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
328 : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
329 if (vertical)
330 StretchBlt32( hdc, rect->left, rect->bottom - arrowSize - 1,
331 rect->right - rect->left, arrowSize + 1,
332 hdcMem, 0, 0,
333 SYSMETRICS_CXVSCROLL + 1, SYSMETRICS_CYHSCROLL + 1,
334 SRCCOPY );
335 else
336 StretchBlt32( hdc, rect->right - arrowSize - 1, rect->top,
337 arrowSize + 1, rect->bottom - rect->top,
338 hdcMem, 0, 0,
339 SYSMETRICS_CXVSCROLL + 1, SYSMETRICS_CYHSCROLL + 1,
340 SRCCOPY );
341 SelectObject32( hdcMem, hbmpPrev );
342 DeleteDC32( hdcMem );
343 }
344
345
346 /***********************************************************************
347 * SCROLL_DrawMovingThumb
348 *
349 * Draw the moving thumb rectangle.
350 */
351 static void SCROLL_DrawMovingThumb( HDC32 hdc, RECT32 *rect, BOOL32 vertical,
352 INT32 arrowSize, INT32 thumbSize )
353 {
354 RECT32 r = *rect;
355 if (vertical)
356 {
357 r.top += SCROLL_TrackingPos;
358 if (r.top < rect->top + arrowSize) r.top = rect->top + arrowSize;
359 if (r.top + thumbSize >= rect->bottom - arrowSize)
360 r.top = rect->bottom - arrowSize - thumbSize - 1;
361 r.bottom = r.top + thumbSize + 1;
362 }
363 else
364 {
365 r.left += SCROLL_TrackingPos;
366 if (r.left < rect->left + arrowSize) r.left = rect->left + arrowSize;
367 if (r.left + thumbSize >= rect->right - arrowSize)
368 r.left = rect->right - arrowSize - thumbSize - 1;
369 r.right = r.left + thumbSize + 1;
370 }
371 InflateRect32( &r, -1, -1 );
372 DrawFocusRect32( hdc, &r );
373 SCROLL_MovingThumb = !SCROLL_MovingThumb;
374 }
375
376
377 /***********************************************************************
378 * SCROLL_DrawInterior
379 *
380 * Draw the scroll bar interior (everything except the arrows).
381 */
382 static void SCROLL_DrawInterior( HWND32 hwnd, HDC32 hdc, INT32 nBar,
383 RECT32 *rect, INT32 arrowSize,
384 INT32 thumbSize, INT32 thumbPos,
385 UINT32 flags, BOOL32 vertical,
386 BOOL32 top_selected, BOOL32 bottom_selected )
387 {
388 RECT32 r;
389
390 /* Select the correct brush and pen */
391
392 SelectObject32( hdc, sysColorObjects.hpenWindowFrame );
393 if ((flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
394 {
395 /* This ought to be the color of the parent window */
396 SelectObject32( hdc, sysColorObjects.hbrushWindow );
397 }
398 else
399 {
400 if (nBar == SB_CTL) /* Only scrollbar controls send WM_CTLCOLOR */
401 {
402 HBRUSH32 hbrush = SendMessage32A(GetParent32(hwnd),
403 WM_CTLCOLORSCROLLBAR, hdc, hwnd );
404 SelectObject32( hdc, hbrush );
405 }
406 else SelectObject32( hdc, sysColorObjects.hbrushScrollbar );
407 }
408
409 /* Calculate the scroll rectangle */
410
411 r = *rect;
412 if (vertical)
413 {
414 r.top += arrowSize;
415 r.bottom -= arrowSize;
416 }
417 else
418 {
419 r.left += arrowSize;
420 r.right -= arrowSize;
421 }
422
423 /* Draw the scroll bar frame */
424
425 MoveTo( hdc, r.left, r.top );
426 LineTo32( hdc, r.right-1, r.top );
427 LineTo32( hdc, r.right-1, r.bottom-1 );
428 LineTo32( hdc, r.left, r.bottom-1 );
429 LineTo32( hdc, r.left, r.top );
430
431 /* Draw the scroll rectangles and thumb */
432
433 if (!thumbPos) /* No thumb to draw */
434 {
435 PatBlt32( hdc, r.left+1, r.top+1, r.right - r.left - 2,
436 r.bottom - r.top - 2, PATCOPY );
437 return;
438 }
439
440 if (vertical)
441 {
442 PatBlt32( hdc, r.left + 1, r.top + 1,
443 r.right - r.left - 2,
444 thumbPos - arrowSize,
445 top_selected ? 0x0f0000 : PATCOPY );
446 r.top += thumbPos - arrowSize;
447 PatBlt32( hdc, r.left + 1, r.top + thumbSize + 1,
448 r.right - r.left - 2,
449 r.bottom - r.top - thumbSize - 2,
450 bottom_selected ? 0x0f0000 : PATCOPY );
451 r.bottom = r.top + thumbSize + 1;
452 }
453 else /* horizontal */
454 {
455 PatBlt32( hdc, r.left + 1, r.top + 1,
456 thumbPos - arrowSize,
457 r.bottom - r.top - 2,
458 top_selected ? 0x0f0000 : PATCOPY );
459 r.left += thumbPos - arrowSize;
460 PatBlt32( hdc, r.left + thumbSize + 1, r.top + 1,
461 r.right - r.left - thumbSize - 2,
462 r.bottom - r.top - 2,
463 bottom_selected ? 0x0f0000 : PATCOPY );
464 r.right = r.left + thumbSize + 1;
465 }
466
467 /* Draw the thumb */
468
469 SelectObject32( hdc, sysColorObjects.hbrushBtnFace );
470 Rectangle32( hdc, r.left, r.top, r.right, r.bottom );
471 InflateRect32( &r, -1, -1 );
472 GRAPH_DrawReliefRect( hdc, &r, 1, 2, FALSE );
473 if (SCROLL_MovingThumb &&
474 (SCROLL_TrackingWin == hwnd) &&
475 (SCROLL_TrackingBar == nBar))
476 {
477 SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
478 SCROLL_MovingThumb = TRUE;
479 }
480 }
481
482
483 /***********************************************************************
484 * SCROLL_DrawScrollBar
485 *
486 * Redraw the whole scrollbar.
487 */
488 void SCROLL_DrawScrollBar( HWND32 hwnd, HDC32 hdc, INT32 nBar, BOOL32 arrows )
489 {
490 INT32 arrowSize, thumbSize, thumbPos;
491 RECT32 rect;
492 BOOL32 vertical;
493 WND *wndPtr = WIN_FindWndPtr( hwnd );
494 SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
495
496 if (!wndPtr || !infoPtr ||
497 ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
498 ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) return;
499
500 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
501 &arrowSize, &thumbSize, &thumbPos );
502 /* Draw the arrows */
503
504 if (arrows && arrowSize) SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize,
505 vertical, FALSE, FALSE );
506
507 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
508 thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
509 }
510
511
512 /***********************************************************************
513 * SCROLL_RefreshScrollBar
514 *
515 * Repaint the scroll bar interior after a SetScrollRange() or
516 * SetScrollPos() call.
517 */
518 static void SCROLL_RefreshScrollBar( HWND32 hwnd, INT32 nBar, BOOL32 arrows )
519 {
520 HDC32 hdc = GetDCEx32( hwnd, 0,
521 DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
522 if (!hdc) return;
523 SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows );
524 ReleaseDC32( hwnd, hdc );
525 }
526
527
528 /***********************************************************************
529 * SCROLL_HandleKbdEvent
530 *
531 * Handle a keyboard event (only for SB_CTL scrollbars).
532 */
533 static void SCROLL_HandleKbdEvent( HWND32 hwnd, WPARAM32 wParam )
534 {
535 WND *wndPtr = WIN_FindWndPtr( hwnd );
536 WPARAM32 msg;
537
538 switch(wParam)
539 {
540 case VK_PRIOR: msg = SB_PAGEUP; break;
541 case VK_NEXT: msg = SB_PAGEDOWN; break;
542 case VK_HOME: msg = SB_TOP; break;
543 case VK_END: msg = SB_BOTTOM; break;
544 case VK_UP: msg = SB_LINEUP; break;
545 case VK_DOWN: msg = SB_LINEDOWN; break;
546 default:
547 return;
548 }
549 SendMessage32A( GetParent32(hwnd),
550 (wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
551 msg, hwnd );
552 }
553
554
555 /***********************************************************************
556 * SCROLL_HandleScrollEvent
557 *
558 * Handle a mouse or timer event for the scrollbar.
559 * 'pt' is the location of the mouse event in client (for SB_CTL) or
560 * windows coordinates.
561 */
562 void SCROLL_HandleScrollEvent( HWND32 hwnd, INT32 nBar, UINT32 msg, POINT32 pt)
563 {
564 /* Previous mouse position for timer events */
565 static POINT32 prevPt;
566 /* Hit test code of the last button-down event */
567 static enum SCROLL_HITTEST trackHitTest;
568 /* Thumb position when tracking started. */
569 static UINT32 trackThumbPos;
570 /* Position in the scroll-bar of the last button-down event. */
571 static INT32 lastClickPos;
572 /* Position in the scroll-bar of the last mouse event. */
573 static INT32 lastMousePos;
574
575 enum SCROLL_HITTEST hittest;
576 HWND32 hwndOwner, hwndCtl;
577 BOOL32 vertical;
578 INT32 arrowSize, thumbSize, thumbPos;
579 RECT32 rect;
580 HDC32 hdc;
581
582 SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
583 if (!infoPtr) return;
584 if ((trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN)) return;
585
586 hdc = GetDCEx32( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
587 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
588 &arrowSize, &thumbSize, &thumbPos );
589 hwndOwner = (nBar == SB_CTL) ? GetParent32(hwnd) : hwnd;
590 hwndCtl = (nBar == SB_CTL) ? hwnd : 0;
591
592 switch(msg)
593 {
594 case WM_LBUTTONDOWN: /* Initialise mouse tracking */
595 trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt );
596 lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
597 lastMousePos = lastClickPos;
598 trackThumbPos = thumbPos;
599 prevPt = pt;
600 SetCapture32( hwnd );
601 if (nBar == SB_CTL) SetFocus32( hwnd );
602 break;
603
604 case WM_MOUSEMOVE:
605 hittest = SCROLL_HitTest( hwnd, nBar, pt );
606 prevPt = pt;
607 break;
608
609 case WM_LBUTTONUP:
610 hittest = SCROLL_NOWHERE;
611 ReleaseCapture();
612 break;
613
614 case WM_SYSTIMER:
615 pt = prevPt;
616 hittest = SCROLL_HitTest( hwnd, nBar, pt );
617 break;
618
619 default:
620 return; /* Should never happen */
621 }
622
623 dprintf_scroll( stddeb, "ScrollBar Event: hwnd=%04x bar=%d msg=%x pt=%d,%d hit=%d\n",
624 hwnd, nBar, msg, pt.x, pt.y, hittest );
625
626 switch(trackHitTest)
627 {
628 case SCROLL_NOWHERE: /* No tracking in progress */
629 break;
630
631 case SCROLL_TOP_ARROW:
632 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
633 (hittest == trackHitTest), FALSE );
634 if (hittest == trackHitTest)
635 {
636 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
637 {
638 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
639 SB_LINEUP, hwndCtl );
640 SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
641 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
642 (TIMERPROC32)0 );
643 }
644 }
645 else KillSystemTimer32( hwnd, SCROLL_TIMER );
646 break;
647
648 case SCROLL_TOP_RECT:
649 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
650 thumbPos, infoPtr->flags, vertical,
651 (hittest == trackHitTest), FALSE );
652 if (hittest == trackHitTest)
653 {
654 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
655 {
656 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
657 SB_PAGEUP, hwndCtl );
658 SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
659 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
660 (TIMERPROC32)0 );
661 }
662 }
663 else KillSystemTimer32( hwnd, SCROLL_TIMER );
664 break;
665
666 case SCROLL_THUMB:
667 if (msg == WM_LBUTTONDOWN)
668 {
669 SCROLL_TrackingWin = hwnd;
670 SCROLL_TrackingBar = nBar;
671 SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
672 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
673 }
674 else if (msg == WM_LBUTTONUP)
675 {
676 SCROLL_TrackingWin = 0;
677 SCROLL_MovingThumb = FALSE;
678 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
679 thumbPos, infoPtr->flags, vertical,
680 FALSE, FALSE );
681 }
682 else /* WM_MOUSEMOVE */
683 {
684 UINT32 pos;
685
686 if (!PtInRect32( &rect, pt )) pos = lastClickPos;
687 else pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
688 if (pos != lastMousePos)
689 {
690 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
691 arrowSize, thumbSize );
692 lastMousePos = pos;
693 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
694 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
695 vertical,
696 SCROLL_TrackingPos );
697 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
698 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
699 hwndCtl );
700 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
701 arrowSize, thumbSize );
702 }
703 }
704 break;
705
706 case SCROLL_BOTTOM_RECT:
707 SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
708 thumbPos, infoPtr->flags, vertical,
709 FALSE, (hittest == trackHitTest) );
710 if (hittest == trackHitTest)
711 {
712 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
713 {
714 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
715 SB_PAGEDOWN, hwndCtl );
716 SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
717 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
718 (TIMERPROC32)0 );
719 }
720 }
721 else KillSystemTimer32( hwnd, SCROLL_TIMER );
722 break;
723
724 case SCROLL_BOTTOM_ARROW:
725 SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
726 FALSE, (hittest == trackHitTest) );
727 if (hittest == trackHitTest)
728 {
729 if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
730 {
731 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
732 SB_LINEDOWN, hwndCtl );
733 SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
734 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
735 (TIMERPROC32)0 );
736 }
737 }
738 else KillSystemTimer32( hwnd, SCROLL_TIMER );
739 break;
740 }
741
742 if (msg == WM_LBUTTONUP)
743 {
744 if (trackHitTest == SCROLL_THUMB)
745 {
746 UINT32 val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
747 trackThumbPos + lastMousePos - lastClickPos );
748 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
749 MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl );
750 }
751 else
752 SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
753 SB_ENDSCROLL, hwndCtl );
754 trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
755 }
756
757 ReleaseDC32( hwnd, hdc );
758 }
759
760
761 /***********************************************************************
762 * ScrollBarWndProc
763 */
764 LRESULT ScrollBarWndProc( HWND32 hwnd, UINT32 message, WPARAM32 wParam,
765 LPARAM lParam )
766 {
767 switch(message)
768 {
769 case WM_CREATE:
770 {
771 CREATESTRUCT32A *lpCreat = (CREATESTRUCT32A *)lParam;
772 if (lpCreat->style & SBS_SIZEBOX)
773 {
774 fprintf( stdnimp, "Unimplemented style SBS_SIZEBOX.\n" );
775 return 0; /* FIXME */
776 }
777
778 if (lpCreat->style & SBS_VERT)
779 {
780 if (lpCreat->style & SBS_LEFTALIGN)
781 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
782 SYSMETRICS_CXVSCROLL+1, lpCreat->cy, FALSE );
783 else if (lpCreat->style & SBS_RIGHTALIGN)
784 MoveWindow( hwnd,
785 lpCreat->x+lpCreat->cx-SYSMETRICS_CXVSCROLL-1,
786 lpCreat->y,
787 SYSMETRICS_CXVSCROLL + 1, lpCreat->cy, FALSE );
788 }
789 else /* SBS_HORZ */
790 {
791 if (lpCreat->style & SBS_TOPALIGN)
792 MoveWindow( hwnd, lpCreat->x, lpCreat->y,
793 lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE );
794 else if (lpCreat->style & SBS_BOTTOMALIGN)
795 MoveWindow( hwnd,
796 lpCreat->x,
797 lpCreat->y+lpCreat->cy-SYSMETRICS_CYHSCROLL-1,
798 lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE );
799 }
800 }
801 if (!hUpArrow) SCROLL_LoadBitmaps();
802 dprintf_scroll( stddeb, "ScrollBar creation, hwnd=%04x\n", hwnd );
803 return 0;
804
805 case WM_LBUTTONDOWN:
806 case WM_LBUTTONUP:
807 case WM_MOUSEMOVE:
808 case WM_SYSTIMER:
809 {
810 POINT32 pt;
811 CONV_POINT16TO32( (POINT16 *)&lParam, &pt );
812 SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
813 }
814 break;
815
816 case WM_KEYDOWN:
817 SCROLL_HandleKbdEvent( hwnd, wParam );
818 break;
819
820 case WM_ERASEBKGND:
821 return 1;
822
823 case WM_GETDLGCODE:
824 return DLGC_WANTARROWS; /* Windows returns this value */
825
826 case WM_PAINT:
827 {
828 PAINTSTRUCT32 ps;
829 HDC32 hdc = BeginPaint32( hwnd, &ps );
830 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE );
831 EndPaint32( hwnd, &ps );
832 }
833 break;
834
835 case SBM_SETPOS16:
836 case SBM_SETPOS32:
837 return SetScrollPos32( hwnd, SB_CTL, wParam, (BOOL32)lParam );
838
839 case SBM_GETPOS16:
840 case SBM_GETPOS32:
841 return GetScrollPos32( hwnd, SB_CTL );
842
843 case SBM_SETRANGE16:
844 SetScrollRange32( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
845 wParam /* FIXME: Is this correct? */ );
846 return 0;
847
848 case SBM_SETRANGE32:
849 SetScrollRange32( hwnd, SB_CTL, wParam, lParam, FALSE );
850 return 0; /* FIXME: return previous position */
851
852 case SBM_GETRANGE16:
853 /* FIXME */
854 fprintf( stderr, "ScrollBar: don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n",
855 wParam, lParam );
856 return 0;
857
858 case SBM_GETRANGE32:
859 GetScrollRange32( hwnd, SB_CTL, (LPINT32)wParam, (LPINT32)lParam );
860 return 0;
861
862 case SBM_ENABLE_ARROWS16:
863 case SBM_ENABLE_ARROWS32:
864 return EnableScrollBar32( hwnd, SB_CTL, wParam );
865
866 case SBM_SETRANGEREDRAW32:
867 SetScrollRange32( hwnd, SB_CTL, wParam, lParam, TRUE );
868 return 0; /* FIXME: return previous position */
869
870 case SBM_SETSCROLLINFO32:
871 return SetScrollInfo32( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
872
873 case SBM_GETSCROLLINFO32:
874 return GetScrollInfo32( hwnd, SB_CTL, (SCROLLINFO *)lParam );
875
876 case 0x00e5:
877 case 0x00e7:
878 case 0x00e8:
879 case 0x00eb:
880 case 0x00ec:
881 case 0x00ed:
882 case 0x00ee:
883 case 0x00ef:
884 fprintf(stderr, "ScrollBar: unknown Win32 msg %04x wp=%08x lp=%08lx\n",
885 message, wParam, lParam );
886 break;
887
888 default:
889 if (message >= WM_USER)
890 fprintf( stderr, "ScrollBar: unknown msg %04x wp=%04x lp=%08lx\n",
891 message, wParam, lParam );
892 return DefWindowProc32A( hwnd, message, wParam, lParam );
893 }
894 return 0;
895 }
896
897
898 /*************************************************************************
899 * SetScrollInfo16 (USER.475)
900 */
901 INT16 SetScrollInfo16( HWND16 hwnd, INT16 nBar, const SCROLLINFO *info,
902 BOOL16 bRedraw )
903 {
904 return (INT16)SetScrollInfo32( hwnd, nBar, info, bRedraw );
905 }
906
907
908 /*************************************************************************
909 * SetScrollInfo32 (USER32.500)
910 */
911 INT32 SetScrollInfo32( HWND32 hwnd, INT32 nBar, const SCROLLINFO *info,
912 BOOL32 bRedraw )
913 {
914 SCROLLBAR_INFO *infoPtr;
915 UINT32 new_flags;
916 BOOL32 repaint_arrows = FALSE;
917
918 if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
919 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
920 if ((info->cbSize != sizeof(*info)) &&
921 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
922
923 dprintf_scroll( stddeb, "SetScrollInfo: hwnd=%04x bar=%d", hwnd, nBar );
924
925 /* Set the page size */
926
927 if (info->fMask & SIF_PAGE)
928 {
929 dprintf_scroll( stddeb, " page=%d", info->nPage );
930 infoPtr->Page = info->nPage;
931 }
932
933 /* Set the scroll pos */
934
935 if (info->fMask & SIF_POS)
936 {
937 dprintf_scroll( stddeb, " pos=%d", info->nPos );
938 infoPtr->CurVal = info->nPos;
939 }
940
941 /* Set the scroll range */
942
943 if (info->fMask & SIF_RANGE)
944 {
945 dprintf_scroll( stddeb, " min=%d max=%d", info->nMin, info->nMax );
946
947 /* Invalid range -> range is set to (0,0) */
948 if ((info->nMin > info->nMax) ||
949 ((UINT32)(info->nMax - info->nMin) >= 0x80000000))
950 {
951 infoPtr->MinVal = 0;
952 infoPtr->MaxVal = 0;
953 }
954 else
955 {
956 infoPtr->MinVal = info->nMin;
957 infoPtr->MaxVal = info->nMax;
958 }
959 }
960
961 /* Make sure the page size is valid */
962
963 if (infoPtr->Page < 0) infoPtr->Page = 0;
964 else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 )
965 infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1;
966
967 /* Make sure the pos is inside the range */
968
969 if (infoPtr->CurVal < infoPtr->MinVal)
970 infoPtr->CurVal = infoPtr->MinVal;
971 else if (infoPtr->CurVal > infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
972 infoPtr->CurVal = infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 );
973
974 dprintf_scroll( stddeb, "\n new values: page=%d pos=%d min=%d max=%d\n",
975 infoPtr->Page, infoPtr->CurVal,
976 infoPtr->MinVal, infoPtr->MaxVal );
977
978 /* Check if the scrollbar should be hidden or disabled */
979
980 new_flags = infoPtr->flags;
981 if (infoPtr->MinVal >= infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
982 {
983 /* Hide or disable scroll-bar */
984 if (info->fMask & SIF_DISABLENOSCROLL) new_flags = ESB_DISABLE_BOTH;
985 else if (nBar != SB_CTL)
986 {
987 ShowScrollBar32( hwnd, nBar, FALSE );
988 bRedraw = FALSE; /* No need to repaint anything */
989 }
990 }
991 else /* Show and enable scroll-bar */
992 {
993 new_flags = 0;
994 if (nBar != SB_CTL) ShowScrollBar32( hwnd, nBar, TRUE );
995 }
996
997 if (infoPtr->flags != new_flags)
998 {
999 infoPtr->flags = new_flags;
1000 repaint_arrows = TRUE;
1001 }
1002
1003 if (bRedraw || repaint_arrows)
1004 SCROLL_RefreshScrollBar( hwnd, nBar, repaint_arrows );
1005
1006 /* Return current position */
1007
1008 return infoPtr->CurVal;
1009 }
1010
1011
1012 /*************************************************************************
1013 * GetScrollInfo16 (USER.476)
1014 */
1015 BOOL16 GetScrollInfo16( HWND16 hwnd, INT16 nBar, LPSCROLLINFO info )
1016 {
1017 return GetScrollInfo32( hwnd, nBar, info );
1018 }
1019
1020
1021 /*************************************************************************
1022 * GetScrollInfo32 (USER32.283)
1023 */
1024 BOOL32 GetScrollInfo32( HWND32 hwnd, INT32 nBar, LPSCROLLINFO info )
1025 {
1026 SCROLLBAR_INFO *infoPtr;
1027
1028 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1029 if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1030 if ((info->cbSize != sizeof(*info)) &&
1031 (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1032
1033 if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page;
1034 if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal;
1035 if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1036 info->nTrackPos = (SCROLL_TrackingWin==hwnd) ? SCROLL_TrackingVal : 0;
1037 if (info->fMask & SIF_RANGE)
1038 {
1039 info->nMin = infoPtr->MinVal;
1040 info->nMax = infoPtr->MaxVal;
1041 }
1042 return (info->fMask & SIF_ALL) != 0;
1043 }
1044
1045
1046 /*************************************************************************
1047 * SetScrollPos16 (USER.62)
1048 */
1049 INT16 SetScrollPos16( HWND16 hwnd, INT16 nBar, INT16 nPos, BOOL16 bRedraw )
1050 {
1051 return (INT16)SetScrollPos32( hwnd, nBar, nPos, bRedraw );
1052 }
1053
1054
1055 /*************************************************************************
1056 * SetScrollPos32 (USER32.501)
1057 */
1058 INT32 SetScrollPos32( HWND32 hwnd, INT32 nBar, INT32 nPos, BOOL32 bRedraw )
1059 {
1060 SCROLLINFO info;
1061 SCROLLBAR_INFO *infoPtr;
1062 INT32 oldPos;
1063
1064 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1065 oldPos = infoPtr->CurVal;
1066 info.cbSize = sizeof(info);
1067 info.nPos = nPos;
1068 info.fMask = SIF_POS;
1069 SetScrollInfo32( hwnd, nBar, &info, bRedraw );
1070 return oldPos;
1071 }
1072
1073
1074 /*************************************************************************
1075 * GetScrollPos16 (USER.63)
1076 */
1077 INT16 GetScrollPos16( HWND16 hwnd, INT16 nBar )
1078 {
1079 return (INT16)GetScrollPos32( hwnd, nBar );
1080 }
1081
1082
1083 /*************************************************************************
1084 * GetScrollPos32 (USER32.284)
1085 */
1086 INT32 GetScrollPos32( HWND32 hwnd, INT32 nBar )
1087 {
1088 SCROLLBAR_INFO *infoPtr;
1089
1090 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1091 return infoPtr->CurVal;
1092 }
1093
1094
1095 /*************************************************************************
1096 * SetScrollRange16 (USER.64)
1097 */
1098 void SetScrollRange16( HWND16 hwnd, INT16 nBar, INT16 MinVal, INT16 MaxVal,
1099 BOOL16 bRedraw )
1100 {
1101 /* Invalid range -> range is set to (0,0) */
1102 if ((INT32)MaxVal - (INT32)MinVal > 0x7fff) MinVal = MaxVal = 0;
1103 SetScrollRange32( hwnd, nBar, MinVal, MaxVal, bRedraw );
1104 }
1105
1106
1107 /*************************************************************************
1108 * SetScrollRange32 (USER32.502)
1109 */
1110 BOOL32 SetScrollRange32( HWND32 hwnd, INT32 nBar, INT32 MinVal, INT32 MaxVal,
1111 BOOL32 bRedraw )
1112 {
1113 SCROLLINFO info;
1114
1115 info.cbSize = sizeof(info);
1116 info.nMin = MinVal;
1117 info.nMax = MaxVal;
1118 info.fMask = SIF_RANGE;
1119 SetScrollInfo32( hwnd, nBar, &info, bRedraw );
1120 return TRUE;
1121 }
1122
1123
1124 /*************************************************************************
1125 * SCROLL_SetNCSbState
1126 *
1127 * This is for CalcChildScroll in windows/mdi.c
1128 */
1129 DWORD SCROLL_SetNCSbState(WND* wndPtr, int vMin, int vMax, int vPos,
1130 int hMin, int hMax, int hPos)
1131 {
1132 SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo(wndPtr, SB_VERT);
1133
1134 wndPtr->dwStyle |= (WS_VSCROLL | WS_HSCROLL);
1135
1136 if( vMin >= vMax )
1137 { vMin = vMax;
1138 wndPtr->dwStyle &= ~WS_VSCROLL; }
1139 if( vPos > vMax ) vPos = vMax; else if( vPos < vMin ) vPos = vMin;
1140 infoPtr->MinVal = vMin;
1141 infoPtr->MaxVal = vMax;
1142 infoPtr->CurVal = vPos;
1143
1144 infoPtr = SCROLL_GetPtrScrollInfo(wndPtr, SB_HORZ);
1145
1146 if( hMin >= hMax )
1147 { hMin = hMax;
1148 wndPtr->dwStyle &= ~WS_HSCROLL; }
1149 if( hPos > hMax ) hPos = hMax; else if( hPos < hMin ) hPos = hMin;
1150 infoPtr->MinVal = hMin;
1151 infoPtr->MaxVal = hMax;
1152 infoPtr->CurVal = hPos;
1153
1154 return wndPtr->dwStyle & (WS_VSCROLL | WS_HSCROLL);
1155 }
1156
1157
1158 /*************************************************************************
1159 * GetScrollRange16 (USER.65)
1160 */
1161 BOOL16 GetScrollRange16( HWND16 hwnd, INT16 nBar, LPINT16 lpMin, LPINT16 lpMax)
1162 {
1163 INT32 min, max;
1164 BOOL16 ret = GetScrollRange32( hwnd, nBar, &min, &max );
1165 if (lpMin) *lpMin = min;
1166 if (lpMax) *lpMax = max;
1167 return ret;
1168 }
1169
1170
1171 /*************************************************************************
1172 * GetScrollRange32 (USER32.285)
1173 */
1174 BOOL32 GetScrollRange32( HWND32 hwnd, INT32 nBar, LPINT32 lpMin, LPINT32 lpMax)
1175 {
1176 SCROLLBAR_INFO *infoPtr;
1177
1178 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1179 {
1180 if (lpMin) lpMin = 0;
1181 if (lpMax) lpMax = 0;
1182 return FALSE;
1183 }
1184 if (lpMin) *lpMin = infoPtr->MinVal;
1185 if (lpMax) *lpMax = infoPtr->MaxVal;
1186 return TRUE;
1187 }
1188
1189
1190 /*************************************************************************
1191 * ShowScrollBar16 (USER.267)
1192 */
1193 void ShowScrollBar16( HWND16 hwnd, INT16 nBar, BOOL16 fShow )
1194 {
1195 ShowScrollBar32( hwnd, nBar, fShow );
1196 }
1197
1198
1199 /*************************************************************************
1200 * ShowScrollBar32 (USER32.531)
1201 */
1202 BOOL32 ShowScrollBar32( HWND32 hwnd, INT32 nBar, BOOL32 fShow )
1203 {
1204 WND *wndPtr = WIN_FindWndPtr( hwnd );
1205
1206 if (!wndPtr) return FALSE;
1207 dprintf_scroll( stddeb, "ShowScrollBar: hwnd=%04x bar=%d on=%d\n",
1208 hwnd, nBar, fShow );
1209
1210 switch(nBar)
1211 {
1212 case SB_CTL:
1213 ShowWindow( hwnd, fShow ? SW_SHOW : SW_HIDE );
1214 return TRUE;
1215
1216 case SB_HORZ:
1217 if (fShow)
1218 {
1219 if (wndPtr->dwStyle & WS_HSCROLL) return TRUE;
1220 wndPtr->dwStyle |= WS_HSCROLL;
1221 }
1222 else /* hide it */
1223 {
1224 if (!(wndPtr->dwStyle & WS_HSCROLL)) return TRUE;
1225 wndPtr->dwStyle &= ~WS_HSCROLL;
1226 }
1227 break;
1228
1229 case SB_VERT:
1230 if (fShow)
1231 {
1232 if (wndPtr->dwStyle & WS_VSCROLL) return TRUE;
1233 wndPtr->dwStyle |= WS_VSCROLL;
1234 }
1235 else /* hide it */
1236 {
1237 if (!(wndPtr->dwStyle & WS_VSCROLL)) return TRUE;
1238 wndPtr->dwStyle &= ~WS_VSCROLL;
1239 }
1240 break;
1241
1242 case SB_BOTH:
1243 if (fShow)
1244 {
1245 if ((wndPtr->dwStyle & WS_HSCROLL)
1246 && (wndPtr->dwStyle & WS_VSCROLL)) return TRUE;
1247 wndPtr->dwStyle |= WS_HSCROLL | WS_VSCROLL;
1248 }
1249 else /* hide it */
1250 {
1251 if (!(wndPtr->dwStyle & WS_HSCROLL)
1252 && !(wndPtr->dwStyle & WS_VSCROLL)) return TRUE;
1253 wndPtr->dwStyle &= ~(WS_HSCROLL | WS_VSCROLL);
1254 }
1255 break;
1256
1257 default:
1258 return TRUE; /* Nothing to do! */
1259 }
1260 SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1261 | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1262 return TRUE;
1263 }
1264
1265
1266 /*************************************************************************
1267 * EnableScrollBar16 (USER.482)
1268 */
1269 BOOL16 EnableScrollBar16( HWND16 hwnd, INT16 nBar, UINT16 flags )
1270 {
1271 return EnableScrollBar32( hwnd, nBar, flags );
1272 }
1273
1274
1275 /*************************************************************************
1276 * EnableScrollBar32 (USER32.170)
1277 */
1278 BOOL32 EnableScrollBar32( HWND32 hwnd, INT32 nBar, UINT32 flags )
1279 {
1280 SCROLLBAR_INFO *infoPtr;
1281
1282 if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1283 dprintf_scroll( stddeb, "EnableScrollBar: %04x %d %d\n",
1284 hwnd, nBar, flags );
1285 flags &= ESB_DISABLE_BOTH;
1286 if (infoPtr->flags == flags) return FALSE;
1287 infoPtr->flags = flags;
1288
1289 /* Redraw the whole scroll bar */
1290 SCROLL_RefreshScrollBar( hwnd, nBar, TRUE );
1291 return TRUE;
1292 }
GSOC 2012 project to enhance the control panel