dlls/comctl32/pager.c

   1 /*
   2  * Pager control
   3  *
   4  * Copyright 1998, 1999 Eric Kohl
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  * NOTES
  21  *
  22  * This code was audited for completeness against the documented features
  23  * of Comctl32.dll version 6.0 on Sep. 18, 2004, by Robert Shearman.
  24  *
  25  * Unless otherwise noted, we believe this code to be complete, as per
  26  * the specification mentioned above.
  27  * If you discover missing features or bugs please note them below.
  28  *
  29  * TODO:
  30  *    Implement repetitive button press.
  31  *    Adjust arrow size relative to size of button.
  32  *    Allow border size changes.
  33  *    Styles:
  34  *      PGS_DRAGNDROP
  35  *    Notifications:
  36  *      PGN_HOTITEMCHANGE
  37  *    Messages:
  38  *      WM_PRINT and/or WM_PRINTCLIENT
  39  *
  40  * TESTING:
  41  *    Tested primarily with the controlspy Pager application.
  42  *       Susan Farley (susan@codeweavers.com)
  43  *
  44  * IMPLEMENTATION NOTES:
  45  *    This control uses WM_NCPAINT instead of WM_PAINT to paint itself
  46  *    as we need to scroll a child window. In order to do this we move
  47  *    the child window in the control's client area, using the clipping
  48  *    region that is automatically set around the client area. As the
  49  *    entire client area now consists of the child window, we must
  50  *    allocate space (WM_NCCALCSIZE) for the buttons and draw them as
  51  *    a non-client area (WM_NCPAINT).
  52  *       Robert Shearman <rob@codeweavers.com>
  53  */
  54
  55 #include <stdarg.h>
  56 #include <string.h>
  57 #include "windef.h"
  58 #include "winbase.h"
  59 #include "wingdi.h"
  60 #include "winuser.h"
  61 #include "winnls.h"
  62 #include "commctrl.h"
  63 #include "comctl32.h"
  64 #include "wine/debug.h"
  65
  66 WINE_DEFAULT_DEBUG_CHANNEL(pager);
  67
  68 typedef struct
  69 {
  70     HWND   hwndSelf;   /* handle of the control wnd */
  71     HWND   hwndChild;  /* handle of the contained wnd */
  72     HWND   hwndNotify; /* handle of the parent wnd */
  73     DWORD  dwStyle;    /* styles for this control */
  74     COLORREF clrBk;    /* background color */
  75     INT    nBorder;    /* border size for the control */
  76     INT    nButtonSize;/* size of the pager btns */
  77     INT    nPos;       /* scroll position */
  78     INT    nWidth;     /* from child wnd's response to PGN_CALCSIZE */
  79     INT    nHeight;    /* from child wnd's response to PGN_CALCSIZE */
  80     BOOL   bForward;   /* forward WM_MOUSEMOVE msgs to the contained wnd */
  81     BOOL   bCapture;   /* we have captured the mouse  */
  82     INT    TLbtnState; /* state of top or left btn */
  83     INT    BRbtnState; /* state of bottom or right btn */
  84     INT    direction;  /* direction of the scroll, (e.g. PGF_SCROLLUP) */
  85 } PAGER_INFO;
  86
  87 #define MIN_ARROW_WIDTH  8
  88 #define MIN_ARROW_HEIGHT 5
  89
  90 #define TIMERID1         1
  91 #define TIMERID2         2
  92 #define INITIAL_DELAY    500
  93 #define REPEAT_DELAY     50
  94
  95 static void
  96 PAGER_GetButtonRects(const PAGER_INFO* infoPtr, RECT* prcTopLeft, RECT* prcBottomRight, BOOL bClientCoords)
  97 {
  98     RECT rcWindow;
  99     GetWindowRect (infoPtr->hwndSelf, &rcWindow);
 100
 101     if (bClientCoords)
 102     {
 103         POINT pt = {rcWindow.left, rcWindow.top};
 104         ScreenToClient(infoPtr->hwndSelf, &pt);
 105         OffsetRect(&rcWindow, -(rcWindow.left-pt.x), -(rcWindow.top-pt.y));
 106     }
 107     else
 108         OffsetRect(&rcWindow, -rcWindow.left, -rcWindow.top);
 109
 110     *prcTopLeft = *prcBottomRight = rcWindow;
 111     if (infoPtr->dwStyle & PGS_HORZ)
 112     {
 113         prcTopLeft->right = prcTopLeft->left + infoPtr->nButtonSize;
 114         prcBottomRight->left = prcBottomRight->right - infoPtr->nButtonSize;
 115     }
 116     else
 117     {
 118         prcTopLeft->bottom = prcTopLeft->top + infoPtr->nButtonSize;
 119         prcBottomRight->top = prcBottomRight->bottom - infoPtr->nButtonSize;
 120     }
 121 }
 122
 123 /* the horizontal arrows are:
 124  *
 125  * 01234    01234
 126  * 1  *      *
 127  * 2 **      **
 128  * 3***      ***
 129  * 4***      ***
 130  * 5 **      **
 131  * 6  *      *
 132  * 7
 133  *
 134  */
 135 static void
 136 PAGER_DrawHorzArrow (HDC hdc, RECT r, INT colorRef, BOOL left)
 137 {
 138     INT x, y, w, h;
 139     HPEN hPen, hOldPen;
 140
 141     w = r.right - r.left + 1;
 142     h = r.bottom - r.top + 1;
 143     if ((h < MIN_ARROW_WIDTH) || (w < MIN_ARROW_HEIGHT))
 144         return;  /* refuse to draw partial arrow */
 145
 146     if (!(hPen = CreatePen( PS_SOLID, 1, GetSysColor( colorRef )))) return;
 147     hOldPen = SelectObject ( hdc, hPen );
 148     if (left)
 149     {
 150         x = r.left + ((w - MIN_ARROW_HEIGHT) / 2) + 3;
 151         y = r.top + ((h - MIN_ARROW_WIDTH) / 2) + 1;
 152         MoveToEx (hdc, x, y, NULL);
 153         LineTo (hdc, x--, y+5); y++;
 154         MoveToEx (hdc, x, y, NULL);
 155         LineTo (hdc, x--, y+3); y++;
 156         MoveToEx (hdc, x, y, NULL);
 157         LineTo (hdc, x, y+1);
 158     }
 159     else
 160     {
 161         x = r.left + ((w - MIN_ARROW_HEIGHT) / 2) + 1;
 162         y = r.top + ((h - MIN_ARROW_WIDTH) / 2) + 1;
 163         MoveToEx (hdc, x, y, NULL);
 164         LineTo (hdc, x++, y+5); y++;
 165         MoveToEx (hdc, x, y, NULL);
 166         LineTo (hdc, x++, y+3); y++;
 167         MoveToEx (hdc, x, y, NULL);
 168         LineTo (hdc, x, y+1);
 169     }
 170
 171     SelectObject( hdc, hOldPen );
 172     DeleteObject( hPen );
 173 }
 174
 175 /* the vertical arrows are:
 176  *
 177  * 01234567    01234567
 178  * 1******        **
 179  * 2 ****        ****
 180  * 3  **        ******
 181  * 4
 182  *
 183  */
 184 static void
 185 PAGER_DrawVertArrow (HDC hdc, RECT r, INT colorRef, BOOL up)
 186 {
 187     INT x, y, w, h;
 188     HPEN hPen, hOldPen;
 189
 190     w = r.right - r.left + 1;
 191     h = r.bottom - r.top + 1;
 192     if ((h < MIN_ARROW_WIDTH) || (w < MIN_ARROW_HEIGHT))
 193         return;  /* refuse to draw partial arrow */
 194
 195     if (!(hPen = CreatePen( PS_SOLID, 1, GetSysColor( colorRef )))) return;
 196     hOldPen = SelectObject ( hdc, hPen );
 197     if (up)
 198     {
 199         x = r.left + ((w - MIN_ARROW_HEIGHT) / 2) + 1;
 200         y = r.top + ((h - MIN_ARROW_WIDTH) / 2) + 3;
 201         MoveToEx (hdc, x, y, NULL);
 202         LineTo (hdc, x+5, y--); x++;
 203         MoveToEx (hdc, x, y, NULL);
 204         LineTo (hdc, x+3, y--); x++;
 205         MoveToEx (hdc, x, y, NULL);
 206         LineTo (hdc, x+1, y);
 207     }
 208     else
 209     {
 210         x = r.left + ((w - MIN_ARROW_HEIGHT) / 2) + 1;
 211         y = r.top + ((h - MIN_ARROW_WIDTH) / 2) + 1;
 212         MoveToEx (hdc, x, y, NULL);
 213         LineTo (hdc, x+5, y++); x++;
 214         MoveToEx (hdc, x, y, NULL);
 215         LineTo (hdc, x+3, y++); x++;
 216         MoveToEx (hdc, x, y, NULL);
 217         LineTo (hdc, x+1, y);
 218     }
 219
 220     SelectObject( hdc, hOldPen );
 221     DeleteObject( hPen );
 222 }
 223
 224 static void
 225 PAGER_DrawButton(HDC hdc, COLORREF clrBk, RECT arrowRect,
 226                  BOOL horz, BOOL topLeft, INT btnState)
 227 {
 228     HBRUSH   hBrush, hOldBrush;
 229     RECT     rc = arrowRect;
 230
 231     TRACE("arrowRect = %s, btnState = %d\n", wine_dbgstr_rect(&arrowRect), btnState);
 232
 233     if (btnState == PGF_INVISIBLE)
 234         return;
 235
 236     if ((rc.right - rc.left <= 0) || (rc.bottom - rc.top <= 0))
 237         return;
 238
 239     hBrush = CreateSolidBrush(clrBk);
 240     hOldBrush = SelectObject(hdc, hBrush);
 241
 242     FillRect(hdc, &rc, hBrush);
 243
 244     if (btnState == PGF_HOT)
 245     {
 246        DrawEdge( hdc, &rc, BDR_RAISEDINNER, BF_RECT);
 247        if (horz)
 248            PAGER_DrawHorzArrow(hdc, rc, COLOR_WINDOWFRAME, topLeft);
 249        else
 250            PAGER_DrawVertArrow(hdc, rc, COLOR_WINDOWFRAME, topLeft);
 251     }
 252     else if (btnState == PGF_NORMAL)
 253     {
 254        DrawEdge (hdc, &rc, BDR_OUTER, BF_FLAT);
 255        if (horz)
 256            PAGER_DrawHorzArrow(hdc, rc, COLOR_WINDOWFRAME, topLeft);
 257        else
 258            PAGER_DrawVertArrow(hdc, rc, COLOR_WINDOWFRAME, topLeft);
 259     }
 260     else if (btnState == PGF_DEPRESSED)
 261     {
 262        DrawEdge( hdc, &rc, BDR_SUNKENOUTER, BF_RECT);
 263        if (horz)
 264            PAGER_DrawHorzArrow(hdc, rc, COLOR_WINDOWFRAME, topLeft);
 265        else
 266            PAGER_DrawVertArrow(hdc, rc, COLOR_WINDOWFRAME, topLeft);
 267     }
 268     else if (btnState == PGF_GRAYED)
 269     {
 270        DrawEdge (hdc, &rc, BDR_OUTER, BF_FLAT);
 271        if (horz)
 272        {
 273            PAGER_DrawHorzArrow(hdc, rc, COLOR_3DHIGHLIGHT, topLeft);
 274            rc.left++, rc.top++; rc.right++, rc.bottom++;
 275            PAGER_DrawHorzArrow(hdc, rc, COLOR_3DSHADOW, topLeft);
 276        }
 277        else
 278        {
 279            PAGER_DrawVertArrow(hdc, rc, COLOR_3DHIGHLIGHT, topLeft);
 280            rc.left++, rc.top++; rc.right++, rc.bottom++;
 281            PAGER_DrawVertArrow(hdc, rc, COLOR_3DSHADOW, topLeft);
 282        }
 283     }
 284
 285     SelectObject( hdc, hOldBrush );
 286     DeleteObject(hBrush);
 287 }
 288
 289 /* << PAGER_GetDropTarget >> */
 290
 291 static inline LRESULT
 292 PAGER_ForwardMouse (PAGER_INFO* infoPtr, BOOL bFwd)
 293 {
 294     TRACE("[%p]\n", infoPtr->hwndSelf);
 295
 296     infoPtr->bForward = bFwd;
 297
 298     return 0;
 299 }
 300
 301 static inline LRESULT
 302 PAGER_GetButtonState (const PAGER_INFO* infoPtr, INT btn)
 303 {
 304     LRESULT btnState = PGF_INVISIBLE;
 305     TRACE("[%p]\n", infoPtr->hwndSelf);
 306
 307     if (btn == PGB_TOPORLEFT)
 308         btnState = infoPtr->TLbtnState;
 309     else if (btn == PGB_BOTTOMORRIGHT)
 310         btnState = infoPtr->BRbtnState;
 311
 312     return btnState;
 313 }
 314
 315
 316 static inline INT
 317 PAGER_GetPos(const PAGER_INFO *infoPtr)
 318 {
 319     TRACE("[%p] returns %d\n", infoPtr->hwndSelf, infoPtr->nPos);
 320     return infoPtr->nPos;
 321 }
 322
 323 static inline INT
 324 PAGER_GetButtonSize(const PAGER_INFO *infoPtr)
 325 {
 326     TRACE("[%p] returns %d\n", infoPtr->hwndSelf, infoPtr->nButtonSize);
 327     return infoPtr->nButtonSize;
 328 }
 329
 330 static inline INT
 331 PAGER_GetBorder(const PAGER_INFO *infoPtr)
 332 {
 333     TRACE("[%p] returns %d\n", infoPtr->hwndSelf, infoPtr->nBorder);
 334     return infoPtr->nBorder;
 335 }
 336
 337 static inline COLORREF
 338 PAGER_GetBkColor(const PAGER_INFO *infoPtr)
 339 {
 340     TRACE("[%p] returns %06x\n", infoPtr->hwndSelf, infoPtr->clrBk);
 341     return infoPtr->clrBk;
 342 }
 343
 344 static void
 345 PAGER_CalcSize (const PAGER_INFO *infoPtr, INT* size, BOOL getWidth)
 346 {
 347     NMPGCALCSIZE nmpgcs;
 348     ZeroMemory (&nmpgcs, sizeof (NMPGCALCSIZE));
 349     nmpgcs.hdr.hwndFrom = infoPtr->hwndSelf;
 350     nmpgcs.hdr.idFrom   = GetWindowLongPtrW (infoPtr->hwndSelf, GWLP_ID);
 351     nmpgcs.hdr.code = PGN_CALCSIZE;
 352     nmpgcs.dwFlag = getWidth ? PGF_CALCWIDTH : PGF_CALCHEIGHT;
 353     nmpgcs.iWidth = getWidth ? *size : 0;
 354     nmpgcs.iHeight = getWidth ? 0 : *size;
 355     SendMessageW (infoPtr->hwndNotify, WM_NOTIFY, nmpgcs.hdr.idFrom, (LPARAM)&nmpgcs);
 356
 357     *size = getWidth ? nmpgcs.iWidth : nmpgcs.iHeight;
 358
 359     TRACE("[%p] PGN_CALCSIZE returns %s=%d\n", infoPtr->hwndSelf,
 360                   getWidth ? "width" : "height", *size);
 361 }
 362
 363 static void
 364 PAGER_PositionChildWnd(PAGER_INFO* infoPtr)
 365 {
 366     if (infoPtr->hwndChild)
 367     {
 368         RECT rcClient;
 369         int nPos = infoPtr->nPos;
 370
 371         /* compensate for a grayed btn, which will soon become invisible */
 372         if (infoPtr->TLbtnState == PGF_GRAYED)
 373             nPos += infoPtr->nButtonSize;
 374
 375         GetClientRect(infoPtr->hwndSelf, &rcClient);
 376
 377         if (infoPtr->dwStyle & PGS_HORZ)
 378         {
 379             int wndSize = max(0, rcClient.right - rcClient.left);
 380             if (infoPtr->nWidth < wndSize)
 381                 infoPtr->nWidth = wndSize;
 382
 383             TRACE("[%p] SWP %dx%d at (%d,%d)\n", infoPtr->hwndSelf,
 384                          infoPtr->nWidth, infoPtr->nHeight,
 385                          -nPos, 0);
 386             SetWindowPos(infoPtr->hwndChild, 0,
 387                          -nPos, 0,
 388                          infoPtr->nWidth, infoPtr->nHeight,
 389                          SWP_NOZORDER);
 390         }
 391         else
 392         {
 393             int wndSize = max(0, rcClient.bottom - rcClient.top);
 394             if (infoPtr->nHeight < wndSize)
 395                 infoPtr->nHeight = wndSize;
 396
 397             TRACE("[%p] SWP %dx%d at (%d,%d)\n", infoPtr->hwndSelf,
 398                          infoPtr->nWidth, infoPtr->nHeight,
 399                          0, -nPos);
 400             SetWindowPos(infoPtr->hwndChild, 0,
 401                          0, -nPos,
 402                          infoPtr->nWidth, infoPtr->nHeight,
 403                          SWP_NOZORDER);
 404         }
 405
 406         InvalidateRect(infoPtr->hwndChild, NULL, TRUE);
 407     }
 408 }
 409
 410 static INT
 411 PAGER_GetScrollRange(PAGER_INFO* infoPtr)
 412 {
 413     INT scrollRange = 0;
 414
 415     if (infoPtr->hwndChild)
 416     {
 417         INT wndSize, childSize;
 418         RECT wndRect;
 419         GetWindowRect(infoPtr->hwndSelf, &wndRect);
 420
 421         if (infoPtr->dwStyle & PGS_HORZ)
 422         {
 423             wndSize = wndRect.right - wndRect.left;
 424             PAGER_CalcSize(infoPtr, &infoPtr->nWidth, TRUE);
 425             childSize = infoPtr->nWidth;
 426         }
 427         else
 428         {
 429             wndSize = wndRect.bottom - wndRect.top;
 430             PAGER_CalcSize(infoPtr, &infoPtr->nHeight, FALSE);
 431             childSize = infoPtr->nHeight;
 432         }
 433
 434         TRACE("childSize = %d,  wndSize = %d\n", childSize, wndSize);
 435         if (childSize > wndSize)
 436             scrollRange = childSize - wndSize + infoPtr->nButtonSize;
 437     }
 438
 439     TRACE("[%p] returns %d\n", infoPtr->hwndSelf, scrollRange);
 440     return scrollRange;
 441 }
 442
 443 static void
 444 PAGER_UpdateBtns(PAGER_INFO *infoPtr, INT scrollRange, BOOL hideGrayBtns)
 445 {
 446     BOOL resizeClient;
 447     BOOL repaintBtns;
 448     INT oldTLbtnState = infoPtr->TLbtnState;
 449     INT oldBRbtnState = infoPtr->BRbtnState;
 450     POINT pt;
 451     RECT rcTopLeft, rcBottomRight;
 452
 453     /* get button rects */
 454     PAGER_GetButtonRects(infoPtr, &rcTopLeft, &rcBottomRight, FALSE);
 455
 456     GetCursorPos(&pt);
 457
 458     /* update states based on scroll position */
 459     if (infoPtr->nPos > 0)
 460     {
 461         if (infoPtr->TLbtnState == PGF_INVISIBLE || infoPtr->TLbtnState == PGF_GRAYED)
 462             infoPtr->TLbtnState = PGF_NORMAL;
 463     }
 464     else if (PtInRect(&rcTopLeft, pt))
 465         infoPtr->TLbtnState = PGF_GRAYED;
 466     else
 467         infoPtr->TLbtnState = PGF_INVISIBLE;
 468
 469     if (scrollRange <= 0)
 470     {
 471         infoPtr->TLbtnState = PGF_INVISIBLE;
 472         infoPtr->BRbtnState = PGF_INVISIBLE;
 473     }
 474     else if (infoPtr->nPos < scrollRange)
 475     {
 476         if (infoPtr->BRbtnState == PGF_INVISIBLE || infoPtr->BRbtnState == PGF_GRAYED)
 477             infoPtr->BRbtnState = PGF_NORMAL;
 478     }
 479     else if (PtInRect(&rcBottomRight, pt))
 480         infoPtr->BRbtnState = PGF_GRAYED;
 481     else
 482         infoPtr->BRbtnState = PGF_INVISIBLE;
 483
 484     /* only need to resize when entering or leaving PGF_INVISIBLE state */
 485     resizeClient =
 486         ((oldTLbtnState == PGF_INVISIBLE) != (infoPtr->TLbtnState == PGF_INVISIBLE)) ||
 487         ((oldBRbtnState == PGF_INVISIBLE) != (infoPtr->BRbtnState == PGF_INVISIBLE));
 488     /* initiate NCCalcSize to resize client wnd if necessary */
 489     if (resizeClient)
 490         SetWindowPos(infoPtr->hwndSelf, 0, 0, 0, 0, 0,
 491                      SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOMOVE |
 492                      SWP_NOZORDER | SWP_NOACTIVATE);
 493
 494     /* repaint when changing any state */
 495     repaintBtns = (oldTLbtnState != infoPtr->TLbtnState) ||
 496                   (oldBRbtnState != infoPtr->BRbtnState);
 497     if (repaintBtns)
 498         SendMessageW(infoPtr->hwndSelf, WM_NCPAINT, 0, 0);
 499 }
 500
 501 static LRESULT
 502 PAGER_SetPos(PAGER_INFO* infoPtr, INT newPos, BOOL fromBtnPress)
 503 {
 504     INT scrollRange = PAGER_GetScrollRange(infoPtr);
 505     INT oldPos = infoPtr->nPos;
 506
 507     if ((scrollRange <= 0) || (newPos < 0))
 508         infoPtr->nPos = 0;
 509     else if (newPos > scrollRange)
 510         infoPtr->nPos = scrollRange;
 511     else
 512         infoPtr->nPos = newPos;
 513
 514     TRACE("[%p] pos=%d, oldpos=%d\n", infoPtr->hwndSelf, infoPtr->nPos, oldPos);
 515
 516     if (infoPtr->nPos != oldPos)
 517     {
 518         /* gray and restore btns, and if from WM_SETPOS, hide the gray btns */
 519         PAGER_UpdateBtns(infoPtr, scrollRange, !fromBtnPress);
 520         PAGER_PositionChildWnd(infoPtr);
 521     }
 522
 523     return 0;
 524 }
 525
 526 static LRESULT
 527 PAGER_WindowPosChanging(PAGER_INFO* infoPtr, WINDOWPOS *winpos)
 528 {
 529     if ((infoPtr->dwStyle & CCS_NORESIZE) && !(winpos->flags & SWP_NOSIZE))
 530     {
 531         /* don't let the app resize the nonscrollable dimension of a control
 532          * that was created with CCS_NORESIZE style
 533          * (i.e. height for a horizontal pager, or width for a vertical one) */
 534
 535         /* except if the current dimension is 0 and app is setting for
 536          * first time, then save amount as dimension. - GA 8/01 */
 537
 538         if (infoPtr->dwStyle & PGS_HORZ)
 539             if (!infoPtr->nHeight && winpos->cy)
 540                 infoPtr->nHeight = winpos->cy;
 541             else
 542                 winpos->cy = infoPtr->nHeight;
 543         else
 544             if (!infoPtr->nWidth && winpos->cx)
 545                 infoPtr->nWidth = winpos->cx;
 546             else
 547                 winpos->cx = infoPtr->nWidth;
 548         return 0;
 549     }
 550
 551     return DefWindowProcW (infoPtr->hwndSelf, WM_WINDOWPOSCHANGING, 0, (LPARAM)winpos);
 552 }
 553
 554 static INT
 555 PAGER_SetFixedWidth(PAGER_INFO* infoPtr)
 556 {
 557   /* Must set the non-scrollable dimension to be less than the full height/width
 558    * so that NCCalcSize is called.  The Microsoft docs mention 3/4 factor for button
 559    * size, and experimentation shows that the effect is almost right. */
 560
 561     RECT wndRect;
 562     INT delta, h;
 563     GetWindowRect(infoPtr->hwndSelf, &wndRect);
 564
 565     /* see what the app says for btn width */
 566     PAGER_CalcSize(infoPtr, &infoPtr->nWidth, TRUE);
 567
 568     if (infoPtr->dwStyle & CCS_NORESIZE)
 569     {
 570         delta = wndRect.right - wndRect.left - infoPtr->nWidth;
 571         if (delta > infoPtr->nButtonSize)
 572             infoPtr->nWidth += 4 * infoPtr->nButtonSize / 3;
 573         else if (delta > 0)
 574             infoPtr->nWidth +=  infoPtr->nButtonSize / 3;
 575     }
 576
 577     h = wndRect.bottom - wndRect.top + infoPtr->nButtonSize;
 578
 579     TRACE("[%p] infoPtr->nWidth set to %d\n",
 580                infoPtr->hwndSelf, infoPtr->nWidth);
 581
 582     return h;
 583 }
 584
 585 static INT
 586 PAGER_SetFixedHeight(PAGER_INFO* infoPtr)
 587 {
 588   /* Must set the non-scrollable dimension to be less than the full height/width
 589    * so that NCCalcSize is called.  The Microsoft docs mention 3/4 factor for button
 590    * size, and experimentation shows that the effect is almost right. */
 591
 592     RECT wndRect;
 593     INT delta, w;
 594     GetWindowRect(infoPtr->hwndSelf, &wndRect);
 595
 596     /* see what the app says for btn height */
 597     PAGER_CalcSize(infoPtr, &infoPtr->nHeight, FALSE);
 598
 599     if (infoPtr->dwStyle & CCS_NORESIZE)
 600     {
 601         delta = wndRect.bottom - wndRect.top - infoPtr->nHeight;
 602         if (delta > infoPtr->nButtonSize)
 603             infoPtr->nHeight += infoPtr->nButtonSize;
 604         else if (delta > 0)
 605             infoPtr->nHeight +=  infoPtr->nButtonSize / 3;
 606     }
 607
 608     w = wndRect.right - wndRect.left + infoPtr->nButtonSize;
 609
 610     TRACE("[%p] infoPtr->nHeight set to %d\n",
 611                infoPtr->hwndSelf, infoPtr->nHeight);
 612
 613     return w;
 614 }
 615
 616 /******************************************************************
 617  * For the PGM_RECALCSIZE message (but not the other uses in      *
 618  * this module), the native control does only the following:      *
 619  *                                                                *
 620  *    if (some condition)                                         *
 621  *          PostMessageW(hwnd, EM_FMTLINES, 0, 0);                *
 622  *    return DefWindowProcW(hwnd, PGM_RECALCSIZE, 0, 0);          *
 623  *                                                                *
 624  * When we figure out what the "some condition" is we will        *
 625  * implement that for the message processing.                     *
 626  ******************************************************************/
 627
 628 static LRESULT
 629 PAGER_RecalcSize(PAGER_INFO *infoPtr)
 630 {
 631     TRACE("[%p]\n", infoPtr->hwndSelf);
 632
 633     if (infoPtr->hwndChild)
 634     {
 635         INT scrollRange = PAGER_GetScrollRange(infoPtr);
 636
 637         if (scrollRange <= 0)
 638         {
 639             infoPtr->nPos = -1;
 640             PAGER_SetPos(infoPtr, 0, FALSE);
 641         }
 642         else
 643             PAGER_PositionChildWnd(infoPtr);
 644     }
 645
 646     return 1;
 647 }
 648
 649
 650 static COLORREF
 651 PAGER_SetBkColor (PAGER_INFO* infoPtr, COLORREF clrBk)
 652 {
 653     COLORREF clrTemp = infoPtr->clrBk;
 654
 655     infoPtr->clrBk = clrBk;
 656     TRACE("[%p] %06x\n", infoPtr->hwndSelf, infoPtr->clrBk);
 657
 658     /* the native control seems to do things this way */
 659     SetWindowPos(infoPtr->hwndSelf, 0, 0, 0, 0, 0,
 660                  SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOMOVE |
 661                  SWP_NOZORDER | SWP_NOACTIVATE);
 662
 663     RedrawWindow(infoPtr->hwndSelf, 0, 0, RDW_ERASE | RDW_INVALIDATE);
 664
 665     return clrTemp;
 666 }
 667
 668
 669 static INT
 670 PAGER_SetBorder (PAGER_INFO* infoPtr, INT iBorder)
 671 {
 672     INT nTemp = infoPtr->nBorder;
 673
 674     infoPtr->nBorder = iBorder;
 675     TRACE("[%p] %d\n", infoPtr->hwndSelf, infoPtr->nBorder);
 676
 677     PAGER_RecalcSize(infoPtr);
 678
 679     return nTemp;
 680 }
 681
 682
 683 static INT
 684 PAGER_SetButtonSize (PAGER_INFO* infoPtr, INT iButtonSize)
 685 {
 686     INT nTemp = infoPtr->nButtonSize;
 687
 688     infoPtr->nButtonSize = iButtonSize;
 689     TRACE("[%p] %d\n", infoPtr->hwndSelf, infoPtr->nButtonSize);
 690
 691     PAGER_RecalcSize(infoPtr);
 692
 693     return nTemp;
 694 }
 695
 696
 697 static LRESULT
 698 PAGER_SetChild (PAGER_INFO* infoPtr, HWND hwndChild)
 699 {
 700     INT hw;
 701
 702     infoPtr->hwndChild = IsWindow (hwndChild) ? hwndChild : 0;
 703
 704     if (infoPtr->hwndChild)
 705     {
 706         TRACE("[%p] hwndChild=%p\n", infoPtr->hwndSelf, infoPtr->hwndChild);
 707
 708         if (infoPtr->dwStyle & PGS_HORZ) {
 709             hw = PAGER_SetFixedHeight(infoPtr);
 710             /* adjust non-scrollable dimension to fit the child */
 711             SetWindowPos(infoPtr->hwndSelf, 0, 0, 0, hw, infoPtr->nHeight,
 712                          SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOZORDER |
 713                          SWP_NOSIZE | SWP_NOACTIVATE);
 714         }
 715         else {
 716             hw = PAGER_SetFixedWidth(infoPtr);
 717             /* adjust non-scrollable dimension to fit the child */
 718             SetWindowPos(infoPtr->hwndSelf, 0, 0, 0, infoPtr->nWidth, hw,
 719                          SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOZORDER |
 720                          SWP_NOSIZE | SWP_NOACTIVATE);
 721         }
 722
 723         /* position child within the page scroller */
 724         SetWindowPos(infoPtr->hwndChild, HWND_TOP,
 725                      0,0,0,0,
 726                      SWP_SHOWWINDOW | SWP_NOSIZE);  /* native is 0 */
 727
 728         infoPtr->nPos = -1;
 729         PAGER_SetPos(infoPtr, 0, FALSE);
 730     }
 731
 732     return 0;
 733 }
 734
 735 static void
 736 PAGER_Scroll(PAGER_INFO* infoPtr, INT dir)
 737 {
 738     NMPGSCROLL nmpgScroll;
 739     RECT rcWnd;
 740
 741     if (infoPtr->hwndChild)
 742     {
 743         ZeroMemory (&nmpgScroll, sizeof (NMPGSCROLL));
 744         nmpgScroll.hdr.hwndFrom = infoPtr->hwndSelf;
 745         nmpgScroll.hdr.idFrom   = GetWindowLongPtrW (infoPtr->hwndSelf, GWLP_ID);
 746         nmpgScroll.hdr.code = PGN_SCROLL;
 747
 748         GetWindowRect(infoPtr->hwndSelf, &rcWnd);
 749         GetClientRect(infoPtr->hwndSelf, &nmpgScroll.rcParent);
 750         nmpgScroll.iXpos = nmpgScroll.iYpos = 0;
 751         nmpgScroll.iDir = dir;
 752
 753         if (infoPtr->dwStyle & PGS_HORZ)
 754         {
 755             nmpgScroll.iScroll = rcWnd.right - rcWnd.left;
 756             nmpgScroll.iXpos = infoPtr->nPos;
 757         }
 758         else
 759         {
 760             nmpgScroll.iScroll = rcWnd.bottom - rcWnd.top;
 761             nmpgScroll.iYpos = infoPtr->nPos;
 762         }
 763         nmpgScroll.iScroll -= 2*infoPtr->nButtonSize;
 764
 765         SendMessageW (infoPtr->hwndNotify, WM_NOTIFY, nmpgScroll.hdr.idFrom, (LPARAM)&nmpgScroll);
 766
 767         TRACE("[%p] PGN_SCROLL returns iScroll=%d\n", infoPtr->hwndSelf, nmpgScroll.iScroll);
 768
 769         if (nmpgScroll.iScroll > 0)
 770         {
 771             infoPtr->direction = dir;
 772
 773             if (dir == PGF_SCROLLLEFT || dir == PGF_SCROLLUP)
 774                 PAGER_SetPos(infoPtr, infoPtr->nPos - nmpgScroll.iScroll, TRUE);
 775             else
 776                 PAGER_SetPos(infoPtr, infoPtr->nPos + nmpgScroll.iScroll, TRUE);
 777         }
 778         else
 779             infoPtr->direction = -1;
 780     }
 781 }
 782
 783 static LRESULT
 784 PAGER_FmtLines(const PAGER_INFO *infoPtr)
 785 {
 786     /* initiate NCCalcSize to resize client wnd and get size */
 787     SetWindowPos(infoPtr->hwndSelf, 0, 0, 0, 0, 0,
 788                  SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOMOVE |
 789                  SWP_NOZORDER | SWP_NOACTIVATE);
 790
 791     SetWindowPos(infoPtr->hwndChild, 0,
 792                  0,0,infoPtr->nWidth,infoPtr->nHeight,
 793                  0);
 794
 795     return DefWindowProcW (infoPtr->hwndSelf, EM_FMTLINES, 0, 0);
 796 }
 797
 798 static LRESULT
 799 PAGER_Create (HWND hwnd, const CREATESTRUCTW *lpcs)
 800 {
 801     PAGER_INFO *infoPtr;
 802
 803     /* allocate memory for info structure */
 804     infoPtr = Alloc (sizeof(PAGER_INFO));
 805     if (!infoPtr) return -1;
 806     SetWindowLongPtrW (hwnd, 0, (DWORD_PTR)infoPtr);
 807
 808     /* set default settings */
 809     infoPtr->hwndSelf = hwnd;
 810     infoPtr->hwndChild = NULL;
 811     infoPtr->hwndNotify = lpcs->hwndParent;
 812     infoPtr->dwStyle = lpcs->style;
 813     infoPtr->clrBk = GetSysColor(COLOR_BTNFACE);
 814     infoPtr->nBorder = 0;
 815     infoPtr->nButtonSize = 12;
 816     infoPtr->nPos = 0;
 817     infoPtr->nWidth = 0;
 818     infoPtr->nHeight = 0;
 819     infoPtr->bForward = FALSE;
 820     infoPtr->bCapture = FALSE;
 821     infoPtr->TLbtnState = PGF_INVISIBLE;
 822     infoPtr->BRbtnState = PGF_INVISIBLE;
 823     infoPtr->direction = -1;
 824
 825     if (infoPtr->dwStyle & PGS_DRAGNDROP)
 826         FIXME("[%p] Drag and Drop style is not implemented yet.\n", infoPtr->hwndSelf);
 827
 828     return 0;
 829 }
 830
 831
 832 static LRESULT
 833 PAGER_Destroy (PAGER_INFO *infoPtr)
 834 {
 835     SetWindowLongPtrW (infoPtr->hwndSelf, 0, 0);
 836     Free (infoPtr);  /* free pager info data */
 837     return 0;
 838 }
 839
 840 static LRESULT
 841 PAGER_NCCalcSize(PAGER_INFO* infoPtr, WPARAM wParam, LPRECT lpRect)
 842 {
 843     RECT rcChild, rcWindow;
 844
 845     /*
 846      * lpRect points to a RECT struct.  On entry, the struct
 847      * contains the proposed wnd rectangle for the window.
 848      * On exit, the struct should contain the screen
 849      * coordinates of the corresponding window's client area.
 850      */
 851
 852     DefWindowProcW (infoPtr->hwndSelf, WM_NCCALCSIZE, wParam, (LPARAM)lpRect);
 853
 854     TRACE("orig rect=%s\n", wine_dbgstr_rect(lpRect));
 855
 856     GetWindowRect (infoPtr->hwndChild, &rcChild);
 857     MapWindowPoints (0, infoPtr->hwndSelf, (LPPOINT)&rcChild, 2); /* FIXME: RECT != 2 POINTS */
 858     GetWindowRect (infoPtr->hwndSelf, &rcWindow);
 859
 860     if (infoPtr->dwStyle & PGS_HORZ)
 861     {
 862         infoPtr->nWidth = lpRect->right - lpRect->left;
 863         PAGER_CalcSize (infoPtr, &infoPtr->nWidth, TRUE);
 864
 865         if (infoPtr->TLbtnState && (lpRect->left + infoPtr->nButtonSize < lpRect->right))
 866             lpRect->left += infoPtr->nButtonSize;
 867         if (infoPtr->BRbtnState && (lpRect->right - infoPtr->nButtonSize > lpRect->left))
 868             lpRect->right -= infoPtr->nButtonSize;
 869     }
 870     else
 871     {
 872         infoPtr->nHeight = lpRect->bottom - lpRect->top;
 873         PAGER_CalcSize (infoPtr, &infoPtr->nHeight, FALSE);
 874
 875         if (infoPtr->TLbtnState && (lpRect->top + infoPtr->nButtonSize < lpRect->bottom))
 876             lpRect->top += infoPtr->nButtonSize;
 877         if (infoPtr->BRbtnState && (lpRect->bottom - infoPtr->nButtonSize > lpRect->top))
 878             lpRect->bottom -= infoPtr->nButtonSize;
 879     }
 880
 881     TRACE("nPos=%d, nHeight=%d, window=%s\n",
 882           infoPtr->nPos, infoPtr->nHeight,
 883           wine_dbgstr_rect(&rcWindow));
 884
 885     TRACE("[%p] client rect set to %dx%d at (%d,%d) BtnState[%d,%d]\n",
 886           infoPtr->hwndSelf, lpRect->right-lpRect->left, lpRect->bottom-lpRect->top,
 887           lpRect->left, lpRect->top,
 888           infoPtr->TLbtnState, infoPtr->BRbtnState);
 889
 890     return 0;
 891 }
 892
 893 static LRESULT
 894 PAGER_NCPaint (const PAGER_INFO* infoPtr, HRGN hRgn)
 895 {
 896     RECT rcBottomRight, rcTopLeft;
 897     HDC hdc;
 898
 899     if (infoPtr->dwStyle & WS_MINIMIZE)
 900         return 0;
 901
 902     DefWindowProcW (infoPtr->hwndSelf, WM_NCPAINT, (WPARAM)hRgn, 0);
 903
 904     if (!(hdc = GetDCEx (infoPtr->hwndSelf, 0, DCX_USESTYLE | DCX_WINDOW)))
 905         return 0;
 906
 907     PAGER_GetButtonRects(infoPtr, &rcTopLeft, &rcBottomRight, FALSE);
 908
 909     PAGER_DrawButton(hdc, infoPtr->clrBk, rcTopLeft,
 910                      infoPtr->dwStyle & PGS_HORZ, TRUE, infoPtr->TLbtnState);
 911     PAGER_DrawButton(hdc, infoPtr->clrBk, rcBottomRight,
 912                      infoPtr->dwStyle & PGS_HORZ, FALSE, infoPtr->BRbtnState);
 913
 914     ReleaseDC( infoPtr->hwndSelf, hdc );
 915     return 0;
 916 }
 917
 918 static INT
 919 PAGER_HitTest (const PAGER_INFO* infoPtr, const POINT * pt)
 920 {
 921     RECT clientRect, rcTopLeft, rcBottomRight;
 922     POINT ptWindow;
 923
 924     GetClientRect (infoPtr->hwndSelf, &clientRect);
 925
 926     if (PtInRect(&clientRect, *pt))
 927     {
 928         TRACE("child\n");
 929         return -1;
 930     }
 931
 932     ptWindow = *pt;
 933     PAGER_GetButtonRects(infoPtr, &rcTopLeft, &rcBottomRight, TRUE);
 934
 935     if ((infoPtr->TLbtnState != PGF_INVISIBLE) && PtInRect(&rcTopLeft, ptWindow))
 936     {
 937         TRACE("PGB_TOPORLEFT\n");
 938         return PGB_TOPORLEFT;
 939     }
 940     else if ((infoPtr->BRbtnState != PGF_INVISIBLE) && PtInRect(&rcBottomRight, ptWindow))
 941     {
 942         TRACE("PGB_BOTTOMORRIGHT\n");
 943         return PGB_BOTTOMORRIGHT;
 944     }
 945
 946     TRACE("nowhere\n");
 947     return -1;
 948 }
 949
 950 static LRESULT
 951 PAGER_NCHitTest (const PAGER_INFO* infoPtr, INT x, INT y)
 952 {
 953     POINT pt;
 954     INT nHit;
 955
 956     pt.x = x;
 957     pt.y = y;
 958
 959     ScreenToClient (infoPtr->hwndSelf, &pt);
 960     nHit = PAGER_HitTest(infoPtr, &pt);
 961
 962     return (nHit < 0) ? HTTRANSPARENT : HTCLIENT;
 963 }
 964
 965 static LRESULT
 966 PAGER_MouseMove (PAGER_INFO* infoPtr, INT keys, INT x, INT y)
 967 {
 968     POINT clpt, pt;
 969     RECT wnrect, *btnrect = NULL;
 970     BOOL topLeft = FALSE;
 971     INT btnstate = 0;
 972     INT hit;
 973     HDC hdc;
 974
 975     pt.x = x;
 976     pt.y = y;
 977
 978     TRACE("[%p] to (%d,%d)\n", infoPtr->hwndSelf, x, y);
 979     ClientToScreen(infoPtr->hwndSelf, &pt);
 980     GetWindowRect(infoPtr->hwndSelf, &wnrect);
 981     if (PtInRect(&wnrect, pt)) {
 982         RECT TLbtnrect, BRbtnrect;
 983         PAGER_GetButtonRects(infoPtr, &TLbtnrect, &BRbtnrect, FALSE);
 984
 985         clpt = pt;
 986         MapWindowPoints(0, infoPtr->hwndSelf, &clpt, 1);
 987         hit = PAGER_HitTest(infoPtr, &clpt);
 988         if ((hit == PGB_TOPORLEFT) && (infoPtr->TLbtnState == PGF_NORMAL))
 989         {
 990             topLeft = TRUE;
 991             btnrect = &TLbtnrect;
 992             infoPtr->TLbtnState = PGF_HOT;
 993             btnstate = infoPtr->TLbtnState;
 994         }
 995         else if ((hit == PGB_BOTTOMORRIGHT) && (infoPtr->BRbtnState == PGF_NORMAL))
 996         {
 997             topLeft = FALSE;
 998             btnrect = &BRbtnrect;
 999             infoPtr->BRbtnState = PGF_HOT;
1000             btnstate = infoPtr->BRbtnState;
1001         }
1002
1003         /* If in one of the buttons the capture and draw buttons */
1004         if (btnrect)
1005         {
1006             TRACE("[%p] draw btn (%s), Capture %s, style %08x\n",
1007                   infoPtr->hwndSelf, wine_dbgstr_rect(btnrect),
1008                   (infoPtr->bCapture) ? "TRUE" : "FALSE",
1009                   infoPtr->dwStyle);
1010             if (!infoPtr->bCapture)
1011             {
1012                 TRACE("[%p] SetCapture\n", infoPtr->hwndSelf);
1013                 SetCapture(infoPtr->hwndSelf);
1014                 infoPtr->bCapture = TRUE;
1015             }
1016             if (infoPtr->dwStyle & PGS_AUTOSCROLL)
1017                 SetTimer(infoPtr->hwndSelf, TIMERID1, 0x3e, 0);
1018             hdc = GetWindowDC(infoPtr->hwndSelf);
1019             /* OffsetRect(wnrect, 0 | 1, 0 | 1) */
1020             PAGER_DrawButton(hdc, infoPtr->clrBk, *btnrect,
1021                              infoPtr->dwStyle & PGS_HORZ, topLeft, btnstate);
1022             ReleaseDC(infoPtr->hwndSelf, hdc);
1023             return 0;
1024         }
1025     }
1026
1027     /* If we think we are captured, then do release */
1028     if (infoPtr->bCapture && (WindowFromPoint(pt) != infoPtr->hwndSelf))
1029     {
1030         NMHDR nmhdr;
1031
1032         infoPtr->bCapture = FALSE;
1033
1034         if (GetCapture() == infoPtr->hwndSelf)
1035         {
1036             ReleaseCapture();
1037
1038             if (infoPtr->TLbtnState == PGF_GRAYED)
1039             {
1040                 infoPtr->TLbtnState = PGF_INVISIBLE;
1041                 SetWindowPos(infoPtr->hwndSelf, 0, 0, 0, 0, 0,
1042                              SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOMOVE |
1043                              SWP_NOZORDER | SWP_NOACTIVATE);
1044             }
1045             else if (infoPtr->TLbtnState == PGF_HOT)
1046             {
1047                 infoPtr->TLbtnState = PGF_NORMAL;
1048                 /* FIXME: just invalidate button rect */
1049                 RedrawWindow(infoPtr->hwndSelf, NULL, NULL, RDW_FRAME | RDW_INVALIDATE);
1050             }
1051
1052             if (infoPtr->BRbtnState == PGF_GRAYED)
1053             {
1054                 infoPtr->BRbtnState = PGF_INVISIBLE;
1055                 SetWindowPos(infoPtr->hwndSelf, 0, 0, 0, 0, 0,
1056                              SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOMOVE |
1057                              SWP_NOZORDER | SWP_NOACTIVATE);
1058             }
1059             else if (infoPtr->BRbtnState == PGF_HOT)
1060             {
1061                 infoPtr->BRbtnState = PGF_NORMAL;
1062                 /* FIXME: just invalidate button rect */
1063                 RedrawWindow(infoPtr->hwndSelf, NULL, NULL, RDW_FRAME | RDW_INVALIDATE);
1064             }
1065
1066             /* Notify parent of released mouse capture */
1067                 memset(&nmhdr, 0, sizeof(NMHDR));
1068                 nmhdr.hwndFrom = infoPtr->hwndSelf;
1069                 nmhdr.idFrom   = GetWindowLongPtrW(infoPtr->hwndSelf, GWLP_ID);
1070                 nmhdr.code = NM_RELEASEDCAPTURE;
1071                 SendMessageW(infoPtr->hwndNotify, WM_NOTIFY, nmhdr.idFrom, (LPARAM)&nmhdr);
1072         }
1073         if (IsWindow(infoPtr->hwndSelf))
1074             KillTimer(infoPtr->hwndSelf, TIMERID1);
1075     }
1076     return 0;
1077 }
1078
1079 static LRESULT
1080 PAGER_LButtonDown (PAGER_INFO* infoPtr, INT keys, INT x, INT y)
1081 {
1082     BOOL repaintBtns = FALSE;
1083     POINT pt;
1084     INT hit;
1085
1086     pt.x = x;
1087     pt.y = y;
1088
1089     TRACE("[%p] at (%d,%d)\n", infoPtr->hwndSelf, x, y);
1090
1091     hit = PAGER_HitTest(infoPtr, &pt);
1092
1093     /* put btn in DEPRESSED state */
1094     if (hit == PGB_TOPORLEFT)
1095     {
1096         repaintBtns = infoPtr->TLbtnState != PGF_DEPRESSED;
1097         infoPtr->TLbtnState = PGF_DEPRESSED;
1098         SetTimer(infoPtr->hwndSelf, TIMERID1, INITIAL_DELAY, 0);
1099     }
1100     else if (hit == PGB_BOTTOMORRIGHT)
1101     {
1102         repaintBtns = infoPtr->BRbtnState != PGF_DEPRESSED;
1103         infoPtr->BRbtnState = PGF_DEPRESSED;
1104         SetTimer(infoPtr->hwndSelf, TIMERID1, INITIAL_DELAY, 0);
1105     }
1106
1107     if (repaintBtns)
1108         SendMessageW(infoPtr->hwndSelf, WM_NCPAINT, 0, 0);
1109
1110     switch(hit)
1111     {
1112     case PGB_TOPORLEFT:
1113         if (infoPtr->dwStyle & PGS_HORZ)
1114         {
1115             TRACE("[%p] PGF_SCROLLLEFT\n", infoPtr->hwndSelf);
1116             PAGER_Scroll(infoPtr, PGF_SCROLLLEFT);
1117         }
1118         else
1119         {
1120             TRACE("[%p] PGF_SCROLLUP\n", infoPtr->hwndSelf);
1121             PAGER_Scroll(infoPtr, PGF_SCROLLUP);
1122         }
1123         break;
1124     case PGB_BOTTOMORRIGHT:
1125         if (infoPtr->dwStyle & PGS_HORZ)
1126         {
1127             TRACE("[%p] PGF_SCROLLRIGHT\n", infoPtr->hwndSelf);
1128             PAGER_Scroll(infoPtr, PGF_SCROLLRIGHT);
1129         }
1130         else
1131         {
1132             TRACE("[%p] PGF_SCROLLDOWN\n", infoPtr->hwndSelf);
1133             PAGER_Scroll(infoPtr, PGF_SCROLLDOWN);
1134         }
1135         break;
1136     default:
1137         break;
1138     }
1139
1140     return 0;
1141 }
1142
1143 static LRESULT
1144 PAGER_LButtonUp (PAGER_INFO* infoPtr, INT keys, INT x, INT y)
1145 {
1146     TRACE("[%p]\n", infoPtr->hwndSelf);
1147
1148     KillTimer (infoPtr->hwndSelf, TIMERID1);
1149     KillTimer (infoPtr->hwndSelf, TIMERID2);
1150
1151     /* make PRESSED btns NORMAL but don't hide gray btns */
1152     if (infoPtr->TLbtnState & (PGF_HOT | PGF_DEPRESSED))
1153         infoPtr->TLbtnState = PGF_NORMAL;
1154     if (infoPtr->BRbtnState & (PGF_HOT | PGF_DEPRESSED))
1155         infoPtr->BRbtnState = PGF_NORMAL;
1156
1157     return 0;
1158 }
1159
1160 static LRESULT
1161 PAGER_Timer (PAGER_INFO* infoPtr, INT nTimerId)
1162 {
1163     INT dir;
1164
1165     /* if initial timer, kill it and start the repeat timer */
1166     if (nTimerId == TIMERID1) {
1167         if (infoPtr->TLbtnState == PGF_HOT)
1168             dir = (infoPtr->dwStyle & PGS_HORZ) ?
1169                 PGF_SCROLLLEFT : PGF_SCROLLUP;
1170         else
1171             dir = (infoPtr->dwStyle & PGS_HORZ) ?
1172                 PGF_SCROLLRIGHT : PGF_SCROLLDOWN;
1173         TRACE("[%p] TIMERID1: style=%08x, dir=%d\n",
1174               infoPtr->hwndSelf, infoPtr->dwStyle, dir);
1175         KillTimer(infoPtr->hwndSelf, TIMERID1);
1176         SetTimer(infoPtr->hwndSelf, TIMERID1, REPEAT_DELAY, 0);
1177         if (infoPtr->dwStyle & PGS_AUTOSCROLL) {
1178             PAGER_Scroll(infoPtr, dir);
1179             SetWindowPos(infoPtr->hwndSelf, 0, 0, 0, 0, 0,
1180                          SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOMOVE |
1181                          SWP_NOZORDER | SWP_NOACTIVATE);
1182         }
1183         return 0;
1184
1185     }
1186
1187     TRACE("[%p] TIMERID2: dir=%d\n", infoPtr->hwndSelf, infoPtr->direction);
1188     KillTimer(infoPtr->hwndSelf, TIMERID2);
1189     if (infoPtr->direction > 0) {
1190         PAGER_Scroll(infoPtr, infoPtr->direction);
1191         SetTimer(infoPtr->hwndSelf, TIMERID2, REPEAT_DELAY, 0);
1192     }
1193     return 0;
1194 }
1195
1196 static LRESULT
1197 PAGER_EraseBackground (const PAGER_INFO* infoPtr, HDC hdc)
1198 {
1199     POINT pt, ptorig;
1200     HWND parent;
1201
1202     pt.x = 0;
1203     pt.y = 0;
1204     parent = GetParent(infoPtr->hwndSelf);
1205     MapWindowPoints(infoPtr->hwndSelf, parent, &pt, 1);
1206     OffsetWindowOrgEx (hdc, pt.x, pt.y, &ptorig);
1207     SendMessageW (parent, WM_ERASEBKGND, (WPARAM)hdc, 0);
1208     SetWindowOrgEx (hdc, ptorig.x, ptorig.y, 0);
1209
1210     return 0;
1211 }
1212
1213
1214 static LRESULT
1215 PAGER_Size (PAGER_INFO* infoPtr, INT type, INT x, INT y)
1216 {
1217     /* note that WM_SIZE is sent whenever NCCalcSize resizes the client wnd */
1218
1219     TRACE("[%p] %d,%d\n", infoPtr->hwndSelf, x, y);
1220
1221     if (infoPtr->dwStyle & PGS_HORZ)
1222         infoPtr->nHeight = y;
1223     else
1224         infoPtr->nWidth = x;
1225
1226     return PAGER_RecalcSize(infoPtr);
1227 }
1228
1229
1230 static LRESULT
1231 PAGER_StyleChanged(PAGER_INFO *infoPtr, WPARAM wStyleType, const STYLESTRUCT *lpss)
1232 {
1233     DWORD oldStyle = infoPtr->dwStyle;
1234
1235     TRACE("(styletype=%lx, styleOld=0x%08x, styleNew=0x%08x)\n",
1236           wStyleType, lpss->styleOld, lpss->styleNew);
1237
1238     if (wStyleType != GWL_STYLE) return 0;
1239
1240     infoPtr->dwStyle = lpss->styleNew;
1241
1242     if ((oldStyle ^ lpss->styleNew) & (PGS_HORZ | PGS_VERT))
1243     {
1244         PAGER_RecalcSize(infoPtr);
1245     }
1246
1247     return 0;
1248 }
1249
1250 static LRESULT WINAPI
1251 PAGER_WindowProc (HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
1252 {
1253     PAGER_INFO *infoPtr = (PAGER_INFO *)GetWindowLongPtrW(hwnd, 0);
1254
1255     if (!infoPtr && (uMsg != WM_CREATE))
1256         return DefWindowProcW (hwnd, uMsg, wParam, lParam);
1257
1258     switch (uMsg)
1259     {
1260         case EM_FMTLINES:
1261             return PAGER_FmtLines(infoPtr);
1262
1263         case PGM_FORWARDMOUSE:
1264             return PAGER_ForwardMouse (infoPtr, (BOOL)wParam);
1265
1266         case PGM_GETBKCOLOR:
1267             return PAGER_GetBkColor(infoPtr);
1268
1269         case PGM_GETBORDER:
1270             return PAGER_GetBorder(infoPtr);
1271
1272         case PGM_GETBUTTONSIZE:
1273             return PAGER_GetButtonSize(infoPtr);
1274
1275         case PGM_GETPOS:
1276             return PAGER_GetPos(infoPtr);
1277
1278         case PGM_GETBUTTONSTATE:
1279             return PAGER_GetButtonState (infoPtr, (INT)lParam);
1280
1281 /*      case PGM_GETDROPTARGET: */
1282
1283         case PGM_RECALCSIZE:
1284             return PAGER_RecalcSize(infoPtr);
1285
1286         case PGM_SETBKCOLOR:
1287             return PAGER_SetBkColor (infoPtr, (COLORREF)lParam);
1288
1289         case PGM_SETBORDER:
1290             return PAGER_SetBorder (infoPtr, (INT)lParam);
1291
1292         case PGM_SETBUTTONSIZE:
1293             return PAGER_SetButtonSize (infoPtr, (INT)lParam);
1294
1295         case PGM_SETCHILD:
1296             return PAGER_SetChild (infoPtr, (HWND)lParam);
1297
1298         case PGM_SETPOS:
1299             return PAGER_SetPos(infoPtr, (INT)lParam, FALSE);
1300
1301         case WM_CREATE:
1302             return PAGER_Create (hwnd, (LPCREATESTRUCTW)lParam);
1303
1304         case WM_DESTROY:
1305             return PAGER_Destroy (infoPtr);
1306
1307         case WM_SIZE:
1308             return PAGER_Size (infoPtr, (INT)wParam, (short)LOWORD(lParam), (short)HIWORD(lParam));
1309
1310         case WM_NCPAINT:
1311             return PAGER_NCPaint (infoPtr, (HRGN)wParam);
1312
1313         case WM_WINDOWPOSCHANGING:
1314             return PAGER_WindowPosChanging (infoPtr, (WINDOWPOS*)lParam);
1315
1316         case WM_STYLECHANGED:
1317             return PAGER_StyleChanged(infoPtr, wParam, (LPSTYLESTRUCT)lParam);
1318
1319         case WM_NCCALCSIZE:
1320             return PAGER_NCCalcSize (infoPtr, wParam, (LPRECT)lParam);
1321
1322         case WM_NCHITTEST:
1323             return PAGER_NCHitTest (infoPtr, (short)LOWORD(lParam), (short)HIWORD(lParam));
1324
1325         case WM_MOUSEMOVE:
1326             if (infoPtr->bForward && infoPtr->hwndChild)
1327                 PostMessageW(infoPtr->hwndChild, WM_MOUSEMOVE, wParam, lParam);
1328             return PAGER_MouseMove (infoPtr, (INT)wParam, (short)LOWORD(lParam), (short)HIWORD(lParam));
1329
1330         case WM_LBUTTONDOWN:
1331             return PAGER_LButtonDown (infoPtr, (INT)wParam, (short)LOWORD(lParam), (short)HIWORD(lParam));
1332
1333         case WM_LBUTTONUP:
1334             return PAGER_LButtonUp (infoPtr, (INT)wParam, (short)LOWORD(lParam), (short)HIWORD(lParam));
1335
1336         case WM_ERASEBKGND:
1337             return PAGER_EraseBackground (infoPtr, (HDC)wParam);
1338
1339         case WM_TIMER:
1340             return PAGER_Timer (infoPtr, (INT)wParam);
1341
1342         case WM_NOTIFY:
1343         case WM_COMMAND:
1344             return SendMessageW (infoPtr->hwndNotify, uMsg, wParam, lParam);
1345
1346         default:
1347             return DefWindowProcW (hwnd, uMsg, wParam, lParam);
1348     }
1349 }
1350
1351
1352 VOID
1353 PAGER_Register (void)
1354 {
1355     WNDCLASSW wndClass;
1356
1357     ZeroMemory (&wndClass, sizeof(WNDCLASSW));
1358     wndClass.style         = CS_GLOBALCLASS;
1359     wndClass.lpfnWndProc   = PAGER_WindowProc;
1360     wndClass.cbClsExtra    = 0;
1361     wndClass.cbWndExtra    = sizeof(PAGER_INFO *);
1362     wndClass.hCursor       = LoadCursorW (0, (LPWSTR)IDC_ARROW);
1363     wndClass.hbrBackground = (HBRUSH)(COLOR_BTNFACE+1);
1364     wndClass.lpszClassName = WC_PAGESCROLLERW;
1365
1366     RegisterClassW (&wndClass);
1367 }
1368
1369
1370 VOID
1371 PAGER_Unregister (void)
1372 {
1373     UnregisterClassW (WC_PAGESCROLLERW, NULL);
1374 }