controls/scroll.c

   1 /*
   2  * Interface code to SCROLLBAR widget
   3  *
   4  * Copyright  Martin Ayotte, 1993
   5  *
   6  * Small fixes and implemented SB_THUMBPOSITION
   7  * by Peter Broadhurst, 940611
   8  */
   9
  10 /*
  11 #define DEBUG_SCROLL
  12 */
  13 static char Copyright[] = "Copyright Martin Ayotte, 1993";
  14
  15 #include <stdlib.h>
  16 #include <stdio.h>
  17 #include <sys/types.h>
  18 #include <sys/stat.h>
  19 #include "windows.h"
  20 #include "sysmetrics.h"
  21 #include "scroll.h"
  22 #include "heap.h"
  23 #include "win.h"
  24 #include "prototypes.h"
  25
  26 HBITMAP hUpArrow = 0;
  27 HBITMAP hDnArrow = 0;
  28 HBITMAP hLfArrow = 0;
  29 HBITMAP hRgArrow = 0;
  30 HBITMAP hUpArrowD = 0;
  31 HBITMAP hDnArrowD = 0;
  32 HBITMAP hLfArrowD = 0;
  33 HBITMAP hRgArrowD = 0;
  34
  35 LPHEADSCROLL ScrollBarGetWindowAndStorage(HWND hWnd, WND **wndPtr);
  36 LPHEADSCROLL ScrollBarGetStorageHeader(HWND hWnd);
  37 LPHEADSCROLL GetScrollObjectStruct(HWND hWnd, int nBar);
  38 void ScrollBarButtonDown(HWND hWnd, int nBar, int x, int y);
  39 void ScrollBarButtonUp(HWND hWnd, int nBar, int x, int y);
  40 void ScrollBarMouseMove(HWND hWnd, int nBar, WORD wParam, int x, int y);
  41 void StdDrawScrollBar(HWND hWnd, HDC hDC, int nBar, LPRECT lprect, LPHEADSCROLL lphs);
  42 int CreateScrollBarStruct(HWND hWnd);
  43 void NC_CreateScrollBars(HWND hWnd);
  44 LPHEADSCROLL AllocScrollBar(DWORD dwStyle, int width, int height);
  45
  46
  47 /***********************************************************************
  48  *           WIDGETS_ScrollBarWndProc
  49  */
  50 LONG ScrollBarWndProc( HWND hWnd, WORD message, WORD wParam, LONG lParam )
  51 {
  52         WORD    wRet;
  53         short   x, y;
  54         short   width, height;
  55         WND     *wndPtr;
  56         LPHEADSCROLL lphs;
  57         PAINTSTRUCT ps;
  58         HDC             hDC;
  59         BITMAP  bm;
  60         RECT    rect, rect2;
  61         LPCREATESTRUCT lpCreat;
  62         static RECT rectsel;
  63         POINT *pt;
  64         pt=(POINT*)&lParam;
  65         switch(message) {
  66     case WM_CREATE:
  67                 lpCreat = (LPCREATESTRUCT)lParam;
  68                 if (lpCreat->style & SBS_VERT) {
  69                         if (lpCreat->style & SBS_LEFTALIGN)
  70                                 SetWindowPos(hWnd, 0, 0, 0, 16, lpCreat->cy,
  71                                                                 SWP_NOZORDER | SWP_NOMOVE);
  72                         if (lpCreat->style & SBS_RIGHTALIGN)
  73                                 SetWindowPos(hWnd, 0, lpCreat->x + lpCreat->cx - 16,
  74                                                 lpCreat->y, 16, lpCreat->cy, SWP_NOZORDER);
  75                         }
  76                 if (lpCreat->style & SBS_HORZ) {
  77                         if (lpCreat->style & SBS_TOPALIGN)
  78                                 SetWindowPos(hWnd, 0, 0, 0, lpCreat->cx, 16,
  79                                                                 SWP_NOZORDER | SWP_NOMOVE);
  80                         if (lpCreat->style & SBS_BOTTOMALIGN)
  81                                 SetWindowPos(hWnd, 0, lpCreat->x,
  82                                                 lpCreat->y + lpCreat->cy - 16,
  83                                                 lpCreat->cx, 16, SWP_NOZORDER);
  84                         }
  85                 CreateScrollBarStruct(hWnd);
  86 #ifdef DEBUG_SCROLL
  87                 printf("ScrollBar Creation !\n");
  88 #endif
  89                 return 0;
  90         case WM_DESTROY:
  91                 lphs = ScrollBarGetWindowAndStorage(hWnd, &wndPtr);
  92                 if (lphs == 0) return 0;
  93 #ifdef DEBUG_SCROLL
  94                 printf("ScrollBar WM_DESTROY %lX !\n", lphs);
  95 #endif
  96                 free(lphs);
  97                 *((LPHEADSCROLL *)&wndPtr->wExtra[1]) = 0;
  98                 return 0;
  99
 100         case WM_LBUTTONDOWN:
 101                 SetCapture(hWnd);
 102                 ScrollBarButtonDown(hWnd, SB_CTL, pt->x,pt->y);
 103                 break;
 104         case WM_LBUTTONUP:
 105                 ReleaseCapture();
 106                 ScrollBarButtonUp(hWnd, SB_CTL, pt->x,pt->y);
 107                 break;
 108
 109         case WM_MOUSEMOVE:
 110                 ScrollBarMouseMove(hWnd, SB_CTL, wParam, pt->x,pt->y);
 111                 break;
 112         case WM_KEYDOWN:
 113         case WM_KEYUP:
 114         case WM_CHAR:
 115                 lphs = ScrollBarGetWindowAndStorage(hWnd, &wndPtr);
 116                 return(SendMessage(wndPtr->hwndParent, message, wParam, lParam));
 117
 118     case WM_TIMER:
 119 #ifdef DEBUG_SCROLL
 120                 printf("ScrollBar WM_TIMER wParam=%X lParam=%lX !\n", wParam, lParam);
 121 #endif
 122                 lphs = ScrollBarGetWindowAndStorage(hWnd, &wndPtr);
 123                 KillTimer(hWnd, wParam);
 124                 switch(lphs->ButtonDown) {
 125                         case 0:
 126                                 lphs->TimerPending = FALSE;
 127                                 return 0;
 128                         case 1:
 129                         case 3:
 130                                 SendMessage(wndPtr->hwndParent, lphs->Direction,
 131                                 SB_LINEUP, MAKELONG(0, hWnd));
 132                                 break;
 133                         case 2:
 134                         case 4:
 135                                 SendMessage(wndPtr->hwndParent, lphs->Direction,
 136                                 SB_LINEDOWN, MAKELONG(0, hWnd));
 137                                 break;
 138                         case 5:
 139                                 SendMessage(wndPtr->hwndParent, lphs->Direction,
 140                                 SB_PAGEUP, MAKELONG(0, hWnd));
 141                                 break;
 142                         case 6:
 143                                 SendMessage(wndPtr->hwndParent, lphs->Direction,
 144                                 SB_PAGEDOWN, MAKELONG(0, hWnd));
 145                                 break;
 146                         }
 147                 SetTimer(hWnd, 1, 100, NULL);
 148                 return 0;
 149
 150         case WM_PAINT:
 151                 hDC = BeginPaint(hWnd, &ps);
 152                 lphs = ScrollBarGetStorageHeader(hWnd);
 153                 if (lphs != NULL) {
 154                         GetClientRect(hWnd, &rect);
 155                         StdDrawScrollBar(hWnd, hDC, SB_CTL, &rect, lphs);
 156                         }
 157                 EndPaint(hWnd, &ps);
 158                 break;
 159         default:
 160                 return DefWindowProc( hWnd, message, wParam, lParam );
 161         }
 162         return(0);
 163 }
 164
 165
 166
 167 void ScrollBarButtonDown(HWND hWnd, int nBar, int x, int y)
 168 {
 169         LPHEADSCROLL lphs;
 170         HWND    hWndParent;
 171         RECT    rect, rect2;
 172         int             width, height;
 173         LONG    dwOwner;
 174         lphs = GetScrollObjectStruct(hWnd, nBar);
 175         if (nBar == SB_CTL) {
 176                 hWndParent = GetParent(hWnd);
 177                 dwOwner = MAKELONG(0, lphs->hWndOwner);
 178 #ifdef DEBUG_SCROLL
 179                 printf("ScrollBarButtonDown SB_CTL // x=%d y=%d\n", x, y);
 180 #endif
 181                 }
 182         else {
 183                 hWndParent = hWnd;
 184                 dwOwner = 0L;
 185 #ifdef DEBUG_SCROLL
 186                 printf("ScrollBarButtonDown SB_?SCROLL // x=%d y=%d\n", x, y);
 187 #endif
 188                 }
 189 /*
 190         SetFocus(lphs->hWndOwner);
 191 */
 192         CopyRect(&rect, &lphs->rect);
 193 #ifdef DEBUG_SCROLL
 194         printf("ScrollDown / x=%d y=%d left=%d top=%d right=%d bottom=%d \n",
 195                                         x, y, rect.left, rect.top, rect.right, rect.bottom);
 196 #endif
 197         if (lphs->Direction == WM_VSCROLL) {
 198                 width = rect.right - rect.left;
 199                 if (y <= lphs->rectUp.bottom) {
 200                         lphs->ButtonDown = 1;
 201                         InvalidateRect(lphs->hWndOwner, &lphs->rectUp, TRUE);
 202 #ifdef DEBUG_SCROLL
 203                         printf("ScrollBarButtonDown send SB_LINEUP\n");
 204 #endif
 205                         SendMessage(hWndParent, lphs->Direction,
 206                                                                 SB_LINEUP, dwOwner);
 207                         }
 208                 if (y >= lphs->rectDown.top) {
 209                         lphs->ButtonDown = 2;
 210                         InvalidateRect(lphs->hWndOwner, &lphs->rectDown, TRUE);
 211 #ifdef DEBUG_SCROLL
 212                         printf("ScrollBarButtonDown send SB_LINEDOWN\n");
 213 #endif
 214                         SendMessage(hWndParent, lphs->Direction,
 215                                                         SB_LINEDOWN, dwOwner);
 216                         }
 217                 if (y > lphs->rectUp.bottom && y < (lphs->CurPix + width)) {
 218                         lphs->ButtonDown = 5;
 219 #ifdef DEBUG_SCROLL
 220                         printf("ScrollBarButtonDown send SB_PAGEUP\n");
 221 #endif
 222                         SendMessage(hWndParent, lphs->Direction,
 223                                                                 SB_PAGEUP, dwOwner);
 224                         }
 225                 if (y < lphs->rectDown.top && y > (lphs->CurPix + (width << 1))) {
 226                         lphs->ButtonDown = 6;
 227 #ifdef DEBUG_SCROLL
 228                         printf("ScrollBarButtonDown send SB_PAGEDOWN\n");
 229 #endif
 230                         SendMessage(hWndParent, lphs->Direction,
 231                                                         SB_PAGEDOWN, dwOwner);
 232                         }
 233                 if (lphs->MaxPix > 0 && y > (lphs->CurPix + width) &&
 234                         y < (lphs->CurPix + (width << 1))) {
 235                         lphs->ThumbActive = TRUE;
 236 #ifdef DEBUG_SCROLL
 237                         printf("THUMB DOWN !\n");
 238 #endif
 239                         }
 240                 }
 241         else {
 242                 height = rect.bottom - rect.top;
 243                 if (x <= lphs->rectUp.right) {
 244                         lphs->ButtonDown = 3;
 245                         InvalidateRect(lphs->hWndOwner, &lphs->rectUp, TRUE);
 246 #ifdef DEBUG_SCROLL
 247                         printf("ScrollBarButtonDown send SB_LINEUP\n");
 248 #endif
 249                         SendMessage(hWndParent, lphs->Direction,
 250                                                                 SB_LINEUP, dwOwner);
 251                         }
 252                 if (x >= lphs->rectDown.left) {
 253                         lphs->ButtonDown = 4;
 254                         InvalidateRect(lphs->hWndOwner, &lphs->rectDown, TRUE);
 255 #ifdef DEBUG_SCROLL
 256                         printf("ScrollBarButtonDown send SB_LINEDOWN\n");
 257 #endif
 258                         SendMessage(hWndParent, lphs->Direction,
 259                                                         SB_LINEDOWN, dwOwner);
 260                         }
 261                 if (x > lphs->rectUp.right && x < (lphs->CurPix + height)) {
 262                         lphs->ButtonDown = 5;
 263 #ifdef DEBUG_SCROLL
 264                         printf("ScrollBarButtonDown send SB_PAGEUP\n");
 265 #endif
 266                         SendMessage(hWndParent, lphs->Direction,
 267                                                                 SB_PAGEUP, dwOwner);
 268                         }
 269                 if (x < lphs->rectDown.left && x > (lphs->CurPix + (height << 1))) {
 270                         lphs->ButtonDown = 6;
 271 #ifdef DEBUG_SCROLL
 272                         printf("ScrollBarButtonDown send SB_PAGEDOWN\n");
 273 #endif
 274                         SendMessage(hWndParent, lphs->Direction,
 275                                                         SB_PAGEDOWN, dwOwner);
 276                         }
 277                 if (lphs->MaxPix > 0 && x > (lphs->CurPix + height) &&
 278                         x < (lphs->CurPix + (height << 1))) {
 279                         lphs->ThumbActive = TRUE;
 280 #ifdef DEBUG_SCROLL
 281                         printf("THUMB DOWN !\n");
 282 #endif
 283                         }
 284                 }
 285         if (lphs->ButtonDown != 0) {
 286                 UpdateWindow(lphs->hWndOwner);
 287                 if (!lphs->TimerPending && nBar == SB_CTL) {
 288                         lphs->TimerPending = TRUE;
 289                         SetTimer(lphs->hWndOwner, 1, 500, NULL);
 290                         }
 291                 }
 292 }
 293
 294
 295 void ScrollBarButtonUp(HWND hWnd, int nBar, int x, int y)
 296 {
 297         LPHEADSCROLL lphs;
 298         RECT    rect, rect2;
 299         HDC             hDC;
 300 #ifdef DEBUG_SCROLL
 301         printf("ScrollBarButtonUp // x=%d y=%d\n", x, y);
 302 #endif
 303         lphs = GetScrollObjectStruct(hWnd, nBar);
 304         if(lphs->ThumbActive)
 305           {
 306             HWND hWndOwner,hWndParent;
 307             if (nBar == SB_CTL) {
 308                 hWndParent = GetParent(hWnd);
 309                 hWndOwner = lphs->hWndOwner;
 310                 }
 311             else {
 312                 hWndParent = hWnd;
 313                 hWndOwner = 0;
 314                 }
 315
 316
 317             SendMessage(hWndParent, lphs->Direction,
 318                         SB_THUMBPOSITION, MAKELONG(lphs->ThumbVal, hWndOwner));
 319             lphs->ThumbActive = FALSE;
 320           }
 321
 322         if (lphs->ButtonDown != 0) {
 323                 lphs->ButtonDown = 0;
 324                 if (nBar == SB_CTL) {
 325                         GetClientRect(lphs->hWndOwner, &rect);
 326                         InvalidateRect(lphs->hWndOwner, &rect, TRUE);
 327                         UpdateWindow(lphs->hWndOwner);
 328                         }
 329                 else {
 330                         hDC = GetWindowDC(lphs->hWndOwner);
 331                         StdDrawScrollBar(lphs->hWndOwner, hDC, nBar, &lphs->rect, lphs);
 332                         ReleaseDC(lphs->hWndOwner, hDC);
 333                         }
 334                 }
 335 }
 336
 337
 338 void ScrollBarMouseMove(HWND hWnd, int nBar, WORD wParam, int x, int y)
 339 {
 340         LPHEADSCROLL lphs;
 341         HWND    hWndParent;
 342         HWND    hWndOwner;
 343         LONG    dwOwner;
 344         if ((wParam & MK_LBUTTON) == 0) return;
 345         lphs = GetScrollObjectStruct(hWnd, nBar);
 346         if (lphs->ThumbActive == 0) return;
 347         if (nBar == SB_CTL) {
 348                 hWndParent = GetParent(hWnd);
 349                 hWndOwner = lphs->hWndOwner;
 350 #ifdef DEBUG_SCROLL
 351                 printf("ScrollBarButtonMove SB_CTL // x=%d y=%d\n", x, y);
 352 #endif
 353                 }
 354         else {
 355                 hWndParent = hWnd;
 356                 hWndOwner = 0;
 357 #ifdef DEBUG_SCROLL
 358                 printf("ScrollBarButtonMove SB_?SCROLL // x=%d y=%d\n", x, y);
 359 #endif
 360                 }
 361
 362         if(x<lphs->rect.left||x>lphs->rect.right||
 363            y<lphs->rect.top||y>lphs->rect.bottom)
 364           {
 365
 366 #ifdef DEBUG_SCROLL
 367             printf("Rejecting thumb position !\n");
 368 #endif
 369             lphs->ThumbVal=lphs->CurVal;/*revert to last set position*/
 370           }
 371         else
 372           {
 373
 374             if (lphs->Direction == WM_VSCROLL) {
 375               int butsiz = lphs->rect.right - lphs->rect.left;
 376               y = y - butsiz - (butsiz >> 1);
 377             }
 378             else {
 379               int butsiz = lphs->rect.bottom - lphs->rect.top;
 380               y = x - butsiz - (butsiz >> 1);
 381             }
 382             if(y<0)y=0;
 383             if(y>lphs->MaxPix)y=lphs->MaxPix;
 384             lphs->ThumbVal = (y * (lphs->MaxVal - lphs->MinVal) /
 385                               lphs->MaxPix) + lphs->MinVal;
 386           }
 387
 388 #ifdef DEBUG_SCROLL
 389         printf("Scroll WM_MOUSEMOVE val=%d pix=%d\n", lphs->ThumbVal, y);
 390 #endif
 391         SendMessage(hWndParent, lphs->Direction,
 392                 SB_THUMBTRACK, MAKELONG(lphs->ThumbVal, hWndOwner));
 393 }
 394
 395
 396 LPHEADSCROLL ScrollBarGetWindowAndStorage(HWND hWnd, WND **wndPtr)
 397 {
 398     WND  *Ptr;
 399     LPHEADSCROLL lphs;
 400     *(wndPtr) = Ptr = WIN_FindWndPtr(hWnd);
 401     if (Ptr == 0) {
 402         printf("Bad Window handle on ScrollBar !\n");
 403         return 0;
 404         }
 405     lphs = *((LPHEADSCROLL *)&Ptr->wExtra[1]);
 406     return lphs;
 407 }
 408
 409
 410 LPHEADSCROLL ScrollBarGetStorageHeader(HWND hWnd)
 411 {
 412     WND  *wndPtr;
 413     LPHEADSCROLL lphs;
 414     wndPtr = WIN_FindWndPtr(hWnd);
 415     if (wndPtr == 0) {
 416         printf("Bad Window handle on ScrollBar !\n");
 417         return 0;
 418         }
 419     lphs = *((LPHEADSCROLL *)&wndPtr->wExtra[1]);
 420     return lphs;
 421 }
 422
 423
 424
 425 void StdDrawScrollBar(HWND hWnd, HDC hDC, int nBar, LPRECT lprect, LPHEADSCROLL lphs)
 426 {
 427         HWND    hWndParent;
 428         HBRUSH  hBrush;
 429         HDC     hMemDC;
 430         BITMAP  bm;
 431         RECT    rect;
 432         UINT    i, w, w2, h, h2, siz;
 433         char    C[128];
 434         if (lphs == NULL) return;
 435 #ifdef DEBUG_SCROLL
 436         printf("StdDrawScrollBar nBar=%04X !\n", nBar);
 437         if (lphs->Direction == WM_VSCROLL)
 438                 printf("StdDrawScrollBar Vertical left=%d top=%d right=%d bottom=%d !\n",
 439                         lprect->left, lprect->top, lprect->right, lprect->bottom);
 440         else
 441                 printf("StdDrawScrollBar Horizontal left=%d top=%d right=%d bottom=%d !\n",
 442                         lprect->left, lprect->top, lprect->right, lprect->bottom);
 443 #endif
 444         if (nBar == SB_CTL)
 445                 hWndParent = GetParent(hWnd);
 446         else
 447                 hWndParent = lphs->hWndOwner;
 448         hBrush = SendMessage(hWndParent, WM_CTLCOLOR, (WORD)hDC,
 449                                         MAKELONG(hWnd, CTLCOLOR_SCROLLBAR));
 450         if (hBrush == (HBRUSH)NULL)  hBrush = GetStockObject(LTGRAY_BRUSH);
 451         CopyRect(&lphs->rect, lprect);
 452         CopyRect(&lphs->rectUp, lprect);
 453         CopyRect(&lphs->rectDown, lprect);
 454         CopyRect(&rect, lprect);
 455         w = rect.right - rect.left;
 456         h = rect.bottom - rect.top;
 457         if (w == 0 || h == 0) return;
 458         if (lphs->Direction == WM_VSCROLL) {
 459                 if (h > 3 * w)
 460                         lphs->MaxPix = h - 3 * w;
 461                 else
 462                         lphs->MaxPix = 0;
 463                 if (h > 2 * w)
 464                         h2 = w;
 465                 else
 466                         h2 = (h - 4) / 2;
 467                 lphs->rectUp.bottom = h2;
 468                 lphs->rectDown.top = rect.bottom - h2;
 469                 }
 470         else {
 471                 if (w > 3 * h)
 472                         lphs->MaxPix = w - 3 * h;
 473                 else
 474                         lphs->MaxPix = 0;
 475                 if (w > 2 * h)
 476                         w2 = h;
 477                 else
 478                         w2 = (w - 4) / 2;
 479                 lphs->rectUp.right = w2;
 480                 lphs->rectDown.left = rect.right - w2;
 481                 }
 482         if (lphs->MaxVal != lphs->MinVal)
 483         lphs->CurPix = lphs->MaxPix * (lphs->CurVal - lphs->MinVal) /
 484                 (lphs->MaxVal - lphs->MinVal);
 485         if(lphs->CurPix <0)lphs->CurPix=0;
 486         if (lphs->CurPix > lphs->MaxPix)  lphs->CurPix = lphs->MaxPix;
 487
 488         hMemDC = CreateCompatibleDC(hDC);
 489         if (lphs->Direction == WM_VSCROLL) {
 490                 GetObject(hUpArrow, sizeof(BITMAP), (LPSTR)&bm);
 491                 if (lphs->ButtonDown == 1)
 492                         SelectObject(hMemDC, hUpArrowD);
 493                 else
 494                         SelectObject(hMemDC, hUpArrow);
 495                 StretchBlt(hDC, rect.left, rect.top, w, h2, hMemDC,
 496                         0, 0, bm.bmWidth, bm.bmHeight, SRCCOPY);
 497                 GetObject(hDnArrow, sizeof(BITMAP), (LPSTR)&bm);
 498                 if (lphs->ButtonDown == 2)
 499                         SelectObject(hMemDC, hDnArrowD);
 500                 else
 501                         SelectObject(hMemDC, hDnArrow);
 502                 StretchBlt(hDC, rect.left, rect.bottom - h2, w, h2, hMemDC,
 503                         0, 0, bm.bmWidth, bm.bmHeight, SRCCOPY);
 504                 rect.top += h2;
 505                 rect.bottom -= h2;
 506                 }
 507         else {
 508                 GetObject(hLfArrow, sizeof(BITMAP), (LPSTR)&bm);
 509                 if (lphs->ButtonDown == 3)
 510                         SelectObject(hMemDC, hLfArrowD);
 511                 else
 512                         SelectObject(hMemDC, hLfArrow);
 513                 StretchBlt(hDC, rect.left, rect.top, w2, h, hMemDC,
 514                         0, 0, bm.bmWidth, bm.bmHeight, SRCCOPY);
 515                 GetObject(hRgArrow, sizeof(BITMAP), (LPSTR)&bm);
 516                 if (lphs->ButtonDown == 4)
 517                         SelectObject(hMemDC, hRgArrowD);
 518                 else
 519                         SelectObject(hMemDC, hRgArrow);
 520                 StretchBlt(hDC, rect.right - w2, rect.top, w2, h, hMemDC,
 521                         0, 0, bm.bmWidth, bm.bmHeight, SRCCOPY);
 522                 rect.left += w2;
 523                 rect.right -= w2;
 524                 }
 525         DeleteDC(hMemDC);
 526         FillRect(hDC, &rect, hBrush);
 527         if (lphs->MaxPix != 0) {
 528                 if (lphs->Direction == WM_VSCROLL)
 529                         SetRect(&rect, rect.left, rect.top + lphs->CurPix,
 530                                 rect.left + w, rect.top + lphs->CurPix + h2);
 531                 else
 532                         SetRect(&rect, rect.left + lphs->CurPix, rect.top,
 533                                 rect.left + lphs->CurPix + w2, rect.top + h);
 534                 FrameRect(hDC, &rect, GetStockObject(BLACK_BRUSH));
 535                 InflateRect(&rect, -1, -1);
 536                 FillRect(hDC, &rect, GetStockObject(LTGRAY_BRUSH));
 537                 DrawReliefRect(hDC, rect, 2, 0);
 538                 InflateRect(&rect, -3, -3);
 539                 DrawReliefRect(hDC, rect, 1, 1);
 540                 }
 541 }
 542
 543
 544
 545 int CreateScrollBarStruct(HWND hWnd)
 546 {
 547     RECT        rect;
 548     int         width, height;
 549     WND  *wndPtr;
 550     LPHEADSCROLL lphs;
 551     wndPtr = WIN_FindWndPtr(hWnd);
 552     width = wndPtr->rectClient.right - wndPtr->rectClient.left;
 553     height = wndPtr->rectClient.bottom - wndPtr->rectClient.top;
 554     if (width <= height)
 555         lphs = AllocScrollBar(WS_VSCROLL, width, height);
 556     else
 557         lphs = AllocScrollBar(WS_HSCROLL, width, height);
 558 #ifdef DEBUG_SCROLL
 559         printf("CreateScrollBarStruct %lX !\n", lphs);
 560 #endif
 561     *((LPHEADSCROLL *)&wndPtr->wExtra[1]) = lphs;
 562     lphs->hWndOwner = hWnd;
 563     CopyRect(&lphs->rect, &wndPtr->rectClient);
 564     return TRUE;
 565 }
 566
 567
 568
 569 LPHEADSCROLL AllocScrollBar(DWORD dwStyle, int width, int height)
 570 {
 571         LPHEADSCROLL lphs;
 572         if (hUpArrow == (HBITMAP)NULL)
 573                 hUpArrow = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_UPARROWI));
 574         if (hDnArrow == (HBITMAP)NULL)
 575                 hDnArrow = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_DNARROWI));
 576         if (hLfArrow == (HBITMAP)NULL)
 577                 hLfArrow = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_LFARROWI));
 578         if (hRgArrow == (HBITMAP)NULL)
 579                 hRgArrow = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_RGARROWI));
 580         if (hUpArrowD == (HBITMAP)NULL)
 581                 hUpArrowD = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_UPARROWD));
 582         if (hDnArrowD == (HBITMAP)NULL)
 583                 hDnArrowD = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_DNARROWD));
 584         if (hLfArrowD == (HBITMAP)NULL)
 585                 hLfArrowD = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_LFARROWD));
 586         if (hRgArrowD == (HBITMAP)NULL)
 587                 hRgArrowD = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_RGARROWD));
 588         lphs = (LPHEADSCROLL)malloc(sizeof(HEADSCROLL));
 589         if (lphs == 0) {
 590                 printf("Bad Memory Alloc on ScrollBar !\n");
 591                 return NULL;
 592                 }
 593         lphs->ThumbActive = FALSE;
 594         lphs->TimerPending = FALSE;
 595         lphs->ButtonDown = 0;
 596         lphs->MinVal = 0;
 597         lphs->MaxVal = 100;
 598         lphs->CurVal = 0;
 599         lphs->CurPix = 0;
 600         SetRect(&lphs->rect, 0, 0, width, height);
 601         if (dwStyle & WS_VSCROLL) {
 602                 if (height > 3 * width)
 603                         lphs->MaxPix = height - 3 * width;
 604                 else
 605                         lphs->MaxPix = 0;
 606                 lphs->Direction = WM_VSCROLL;
 607                 }
 608         else {
 609                 if (width > 3 * height)
 610                         lphs->MaxPix = width - 3 * height;
 611                 else
 612                         lphs->MaxPix = 0;
 613                 lphs->Direction = WM_HSCROLL;
 614                 }
 615         if (lphs->MaxPix < 1)  lphs->MaxPix = 1;
 616         return lphs;
 617 }
 618
 619
 620 void NC_CreateScrollBars(HWND hWnd)
 621 {
 622         RECT    rect;
 623         int             width, height;
 624         WND     *wndPtr;
 625         LPHEADSCROLL lphs;
 626         wndPtr = WIN_FindWndPtr(hWnd);
 627         GetWindowRect(hWnd, &rect);
 628         width = rect.right - rect.left;
 629         height = rect.bottom - rect.top;
 630         if (wndPtr->dwStyle & WS_VSCROLL) {
 631                 if (wndPtr->dwStyle & WS_HSCROLL) height -= SYSMETRICS_CYHSCROLL;
 632                 lphs = AllocScrollBar(WS_VSCROLL, SYSMETRICS_CXVSCROLL, height);
 633 #ifdef DEBUG_SCROLL
 634                 printf("NC_CreateScrollBars Vertical %lX !\n", lphs);
 635 #endif
 636                 lphs->rect.left = width - SYSMETRICS_CYVSCROLL;
 637                 lphs->rect.right = width;
 638                 lphs->hWndOwner = hWnd;
 639                 wndPtr->VScroll = lphs;
 640             wndPtr->scroll_flags |= 0x0001;
 641                 if (wndPtr->dwStyle & WS_HSCROLL) height += SYSMETRICS_CYHSCROLL;
 642                 }
 643         if (wndPtr->dwStyle & WS_HSCROLL) {
 644                 if (wndPtr->dwStyle & WS_VSCROLL) width -= SYSMETRICS_CYVSCROLL;
 645                 lphs = AllocScrollBar(WS_HSCROLL, width, SYSMETRICS_CYHSCROLL);
 646 #ifdef DEBUG_SCROLL
 647                 printf("NC_CreateScrollBars Horizontal %lX !\n", lphs);
 648 #endif
 649                 lphs->rect.top = height - SYSMETRICS_CYHSCROLL;
 650                 lphs->rect.bottom = height;
 651                 lphs->hWndOwner = hWnd;
 652                 wndPtr->HScroll = lphs;
 653             wndPtr->scroll_flags |= 0x0002;
 654                 }
 655 }
 656
 657
 658 /*************************************************************************
 659  *                      GetScrollObjectStruct [internal]
 660  */
 661 LPHEADSCROLL GetScrollObjectStruct(HWND hWnd, int nBar)
 662 {
 663     WND *wndPtr;
 664     if (nBar != SB_CTL) {
 665         wndPtr = WIN_FindWndPtr(hWnd);
 666         if (nBar == SB_VERT) return (LPHEADSCROLL)wndPtr->VScroll;
 667         if (nBar == SB_HORZ) return (LPHEADSCROLL)wndPtr->HScroll;
 668         return NULL;
 669         }
 670     return ScrollBarGetStorageHeader(hWnd);
 671 }
 672
 673
 674 /*************************************************************************
 675  *                      SetScrollPos [USER.62]
 676  */
 677 int SetScrollPos(HWND hWnd, int nBar, int nPos, BOOL bRedraw)
 678 {
 679         LPHEADSCROLL lphs;
 680         HDC             hDC;
 681         int     nRet;
 682         lphs = GetScrollObjectStruct(hWnd, nBar);
 683         if (lphs == NULL) return 0;
 684         nRet = lphs->CurVal;
 685         lphs->CurVal = (short)nPos;
 686         if (lphs->MaxVal != lphs->MinVal)
 687         lphs->CurPix = lphs->MaxPix * (lphs->CurVal - lphs->MinVal) /
 688                 (lphs->MaxVal - lphs->MinVal);
 689         if(lphs->CurPix <0)lphs->CurPix=0;
 690
 691     if (lphs->CurPix > lphs->MaxPix)  lphs->CurPix = lphs->MaxPix;
 692 #ifdef DEBUG_SCROLL
 693     printf("SetScrollPos val=%d pixval=%d pixmax%d\n",
 694             (short)nPos, lphs->CurPix, lphs->MaxPix);
 695     printf("SetScrollPos min=%d max=%d\n",
 696             lphs->MinVal, lphs->MaxVal);
 697 #endif
 698     if ((bRedraw) && (IsWindowVisible(lphs->hWndOwner))) {
 699                 if (nBar == SB_CTL) {
 700                 InvalidateRect(lphs->hWndOwner, &lphs->rect, TRUE);
 701                 UpdateWindow(lphs->hWndOwner);
 702                         }
 703                 else {
 704                         if (lphs->rect.right != 0 && lphs->rect.bottom != 0) {
 705                                 hDC = GetWindowDC(lphs->hWndOwner);
 706                                 StdDrawScrollBar(lphs->hWndOwner, hDC, nBar, &lphs->rect, lphs);
 707                                 ReleaseDC(lphs->hWndOwner, hDC);
 708                                 }
 709                         }
 710         }
 711     return nRet;
 712 }
 713
 714
 715
 716 /*************************************************************************
 717  *                      GetScrollPos [USER.63]
 718  */
 719 int GetScrollPos(HWND hWnd, int nBar)
 720 {
 721     LPHEADSCROLL lphs;
 722     lphs = GetScrollObjectStruct(hWnd, nBar);
 723     if (lphs == NULL) return 0;
 724     return lphs->CurVal;
 725 }
 726
 727
 728
 729 /*************************************************************************
 730  *                      SetScrollRange [USER.64]
 731  */
 732 void SetScrollRange(HWND hWnd, int nBar, int MinPos, int MaxPos, BOOL bRedraw)
 733 {
 734     LPHEADSCROLL lphs;
 735         HDC             hDC;
 736     lphs = GetScrollObjectStruct(hWnd, nBar);
 737     if (lphs == NULL) return;
 738
 739 /*    should a bad range be rejected here?
 740  */
 741     lphs->MinVal = (short)MinPos;
 742     lphs->MaxVal = (short)MaxPos;
 743     if (lphs->MaxVal != lphs->MinVal)
 744       lphs->CurPix = lphs->MaxPix * (lphs->CurVal - lphs->MinVal) /
 745           (lphs->MaxVal - lphs->MinVal);
 746     if(lphs->CurPix <0)lphs->CurPix=0;
 747     if (lphs->CurPix > lphs->MaxPix)  lphs->CurPix = lphs->MaxPix;
 748 #ifdef DEBUG_SCROLL
 749     printf("SetScrollRange min=%d max=%d\n", lphs->MinVal, lphs->MaxVal);
 750 #endif
 751     if ((bRedraw) && (IsWindowVisible(lphs->hWndOwner))) {
 752                 if (nBar == SB_CTL) {
 753                 InvalidateRect(lphs->hWndOwner, &lphs->rect, TRUE);
 754                 UpdateWindow(lphs->hWndOwner);
 755                         }
 756                 else {
 757                         if (lphs->rect.right != 0 && lphs->rect.bottom != 0) {
 758                                 hDC = GetWindowDC(lphs->hWndOwner);
 759                                 StdDrawScrollBar(lphs->hWndOwner, hDC, nBar, &lphs->rect, lphs);
 760                                 ReleaseDC(lphs->hWndOwner, hDC);
 761                                 }
 762                         }
 763         }
 764 }
 765
 766
 767
 768 /*************************************************************************
 769  *                      GetScrollRange [USER.65]
 770  */
 771 void GetScrollRange(HWND hWnd, int nBar, LPINT lpMin, LPINT lpMax)
 772 {
 773     LPHEADSCROLL lphs;
 774     lphs = GetScrollObjectStruct(hWnd, nBar);
 775     if (lphs == NULL) return;
 776     *lpMin = lphs->MinVal;
 777     *lpMax = lphs->MaxVal;
 778 }
 779
 780
 781
 782 /*************************************************************************
 783  *                      ShowScrollBar [USER.267]
 784  */
 785 void ShowScrollBar(HWND hWnd, WORD wBar, BOOL bFlag)
 786 {
 787         WND  *wndPtr;
 788         printf("ShowScrollBar hWnd=%04X wBar=%d bFlag=%d\n", hWnd, wBar, bFlag);
 789 #ifdef DEBUG_SCROLL
 790         printf("ShowScrollBar hWnd=%04X wBar=%d bFlag=%d\n", hWnd, wBar, bFlag);
 791 #endif
 792         if (wBar == SB_CTL) {
 793                 if (bFlag)
 794                         ShowWindow(hWnd, SW_SHOW);
 795                 else
 796                         ShowWindow(hWnd, SW_HIDE);
 797                 return;
 798                 }
 799         wndPtr = WIN_FindWndPtr(hWnd);
 800         if ((wBar == SB_VERT) || (wBar == SB_BOTH)) {
 801                 if (bFlag)
 802                         wndPtr->scroll_flags != 0x0001;
 803                 else
 804                         wndPtr->scroll_flags &= 0xFFFE;
 805                 }
 806         if ((wBar == SB_HORZ) || (wBar == SB_BOTH)) {
 807                 if (bFlag)
 808                         wndPtr->scroll_flags != 0x0002;
 809                 else
 810                         wndPtr->scroll_flags &= 0xFFFD;
 811                 }
 812         SetWindowPos(hWnd, 0, 0, 0, 0, 0,
 813                 SWP_NOZORDER | SWP_NOMOVE |
 814                 SWP_NOSIZE | SWP_FRAMECHANGED);
 815 }