reactos/dll/win32/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 = (HBRUSH)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,
 356                   (WPARAM)nmpgcs.hdr.idFrom, (LPARAM)&nmpgcs);
 357
 358     *size = getWidth ? nmpgcs.iWidth : nmpgcs.iHeight;
 359
 360     TRACE("[%p] PGN_CALCSIZE returns %s=%d\n", infoPtr->hwndSelf,
 361                   getWidth ? "width" : "height", *size);
 362 }
 363
 364 static void
 365 PAGER_PositionChildWnd(PAGER_INFO* infoPtr)
 366 {
 367     if (infoPtr->hwndChild)
 368     {
 369         RECT rcClient;
 370         int nPos = infoPtr->nPos;
 371
 372         /* compensate for a grayed btn, which will soon become invisible */
 373         if (infoPtr->TLbtnState == PGF_GRAYED)
 374             nPos += infoPtr->nButtonSize;
 375
 376         GetClientRect(infoPtr->hwndSelf, &rcClient);
 377
 378         if (infoPtr->dwStyle & PGS_HORZ)
 379         {
 380             int wndSize = max(0, rcClient.right - rcClient.left);
 381             if (infoPtr->nWidth < wndSize)
 382                 infoPtr->nWidth = wndSize;
 383
 384             TRACE("[%p] SWP %dx%d at (%d,%d)\n", infoPtr->hwndSelf,
 385                          infoPtr->nWidth, infoPtr->nHeight,
 386                          -nPos, 0);
 387             SetWindowPos(infoPtr->hwndChild, 0,
 388                          -nPos, 0,
 389                          infoPtr->nWidth, infoPtr->nHeight,
 390                          SWP_NOZORDER);
 391         }
 392         else
 393         {
 394             int wndSize = max(0, rcClient.bottom - rcClient.top);
 395             if (infoPtr->nHeight < wndSize)
 396                 infoPtr->nHeight = wndSize;
 397
 398             TRACE("[%p] SWP %dx%d at (%d,%d)\n", infoPtr->hwndSelf,
 399                          infoPtr->nWidth, infoPtr->nHeight,
 400                          0, -nPos);
 401             SetWindowPos(infoPtr->hwndChild, 0,
 402                          0, -nPos,
 403                          infoPtr->nWidth, infoPtr->nHeight,
 404                          SWP_NOZORDER);
 405         }
 406
 407         InvalidateRect(infoPtr->hwndChild, NULL, TRUE);
 408     }
 409 }
 410
 411 static INT
 412 PAGER_GetScrollRange(PAGER_INFO* infoPtr)
 413 {
 414     INT scrollRange = 0;
 415
 416     if (infoPtr->hwndChild)
 417     {
 418         INT wndSize, childSize;
 419         RECT wndRect;
 420         GetWindowRect(infoPtr->hwndSelf, &wndRect);
 421
 422         if (infoPtr->dwStyle & PGS_HORZ)
 423         {
 424             wndSize = wndRect.right - wndRect.left;
 425             PAGER_CalcSize(infoPtr, &infoPtr->nWidth, TRUE);
 426             childSize = infoPtr->nWidth;
 427         }
 428         else
 429         {
 430             wndSize = wndRect.bottom - wndRect.top;
 431             PAGER_CalcSize(infoPtr, &infoPtr->nHeight, FALSE);
 432             childSize = infoPtr->nHeight;
 433         }
 434
 435         TRACE("childSize = %d,  wndSize = %d\n", childSize, wndSize);
 436         if (childSize > wndSize)
 437             scrollRange = childSize - wndSize + infoPtr->nButtonSize;
 438     }
 439
 440     TRACE("[%p] returns %d\n", infoPtr->hwndSelf, scrollRange);
 441     return scrollRange;
 442 }
 443
 444 static void
 445 PAGER_UpdateBtns(PAGER_INFO *infoPtr, INT scrollRange, BOOL hideGrayBtns)
 446 {
 447     BOOL resizeClient;
 448     BOOL repaintBtns;
 449     INT oldTLbtnState = infoPtr->TLbtnState;
 450     INT oldBRbtnState = infoPtr->BRbtnState;
 451     POINT pt;
 452     RECT rcTopLeft, rcBottomRight;
 453
 454     /* get button rects */
 455     PAGER_GetButtonRects(infoPtr, &rcTopLeft, &rcBottomRight, FALSE);
 456
 457     GetCursorPos(&pt);
 458
 459     /* update states based on scroll position */
 460     if (infoPtr->nPos > 0)
 461     {
 462         if (infoPtr->TLbtnState == PGF_INVISIBLE || infoPtr->TLbtnState == PGF_GRAYED)
 463             infoPtr->TLbtnState = PGF_NORMAL;
 464     }
 465     else if (PtInRect(&rcTopLeft, pt))
 466         infoPtr->TLbtnState = PGF_GRAYED;
 467     else
 468         infoPtr->TLbtnState = PGF_INVISIBLE;
 469
 470     if (scrollRange <= 0)
 471     {
 472         infoPtr->TLbtnState = PGF_INVISIBLE;
 473         infoPtr->BRbtnState = PGF_INVISIBLE;
 474     }
 475     else if (infoPtr->nPos < scrollRange)
 476     {
 477         if (infoPtr->BRbtnState == PGF_INVISIBLE || infoPtr->BRbtnState == PGF_GRAYED)
 478             infoPtr->BRbtnState = PGF_NORMAL;
 479     }
 480     else if (PtInRect(&rcBottomRight, pt))
 481         infoPtr->BRbtnState = PGF_GRAYED;
 482     else
 483         infoPtr->BRbtnState = PGF_INVISIBLE;
 484
 485     /* only need to resize when entering or leaving PGF_INVISIBLE state */
 486     resizeClient =
 487         ((oldTLbtnState == PGF_INVISIBLE) != (infoPtr->TLbtnState == PGF_INVISIBLE)) ||
 488         ((oldBRbtnState == PGF_INVISIBLE) != (infoPtr->BRbtnState == PGF_INVISIBLE));
 489     /* initiate NCCalcSize to resize client wnd if necessary */
 490     if (resizeClient)
 491         SetWindowPos(infoPtr->hwndSelf, 0, 0, 0, 0, 0,
 492                      SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOMOVE |
 493                      SWP_NOZORDER | SWP_NOACTIVATE);
 494
 495     /* repaint when changing any state */
 496     repaintBtns = (oldTLbtnState != infoPtr->TLbtnState) ||
 497                   (oldBRbtnState != infoPtr->BRbtnState);
 498     if (repaintBtns)
 499         SendMessageW(infoPtr->hwndSelf, WM_NCPAINT, 0, 0);
 500 }
 501
 502 static LRESULT
 503 PAGER_SetPos(PAGER_INFO* infoPtr, INT newPos, BOOL fromBtnPress)
 504 {
 505     INT scrollRange = PAGER_GetScrollRange(infoPtr);
 506     INT oldPos = infoPtr->nPos;
 507
 508     if ((scrollRange <= 0) || (newPos < 0))
 509         infoPtr->nPos = 0;
 510     else if (newPos > scrollRange)
 511         infoPtr->nPos = scrollRange;
 512     else
 513         infoPtr->nPos = newPos;
 514
 515     TRACE("[%p] pos=%d, oldpos=%d\n", infoPtr->hwndSelf, infoPtr->nPos, oldPos);
 516
 517     if (infoPtr->nPos != oldPos)
 518     {
 519         /* gray and restore btns, and if from WM_SETPOS, hide the gray btns */
 520         PAGER_UpdateBtns(infoPtr, scrollRange, !fromBtnPress);
 521         PAGER_PositionChildWnd(infoPtr);
 522     }
 523
 524     return 0;
 525 }
 526
 527 static LRESULT
 528 PAGER_WindowPosChanging(PAGER_INFO* infoPtr, WINDOWPOS *winpos)
 529 {
 530     if ((infoPtr->dwStyle & CCS_NORESIZE) && !(winpos->flags & SWP_NOSIZE))
 531     {
 532         /* don't let the app resize the nonscrollable dimension of a control
 533          * that was created with CCS_NORESIZE style
 534          * (i.e. height for a horizontal pager, or width for a vertical one) */
 535
 536         /* except if the current dimension is 0 and app is setting for
 537          * first time, then save amount as dimension. - GA 8/01 */
 538
 539         if (infoPtr->dwStyle & PGS_HORZ)
 540             if (!infoPtr->nHeight && winpos->cy)
 541                 infoPtr->nHeight = winpos->cy;
 542             else
 543                 winpos->cy = infoPtr->nHeight;
 544         else
 545             if (!infoPtr->nWidth && winpos->cx)
 546                 infoPtr->nWidth = winpos->cx;
 547             else
 548                 winpos->cx = infoPtr->nWidth;
 549         return 0;
 550     }
 551
 552     return DefWindowProcW (infoPtr->hwndSelf, WM_WINDOWPOSCHANGING, 0, (LPARAM)winpos);
 553 }
 554
 555 static INT
 556 PAGER_SetFixedWidth(PAGER_INFO* infoPtr)
 557 {
 558   /* Must set the non-scrollable dimension to be less than the full height/width
 559    * so that NCCalcSize is called.  The Msoft docs mention 3/4 factor for button
 560    * size, and experimentation shows that affect is almost right. */
 561
 562     RECT wndRect;
 563     INT delta, h;
 564     GetWindowRect(infoPtr->hwndSelf, &wndRect);
 565
 566     /* see what the app says for btn width */
 567     PAGER_CalcSize(infoPtr, &infoPtr->nWidth, TRUE);
 568
 569     if (infoPtr->dwStyle & CCS_NORESIZE)
 570     {
 571         delta = wndRect.right - wndRect.left - infoPtr->nWidth;
 572         if (delta > infoPtr->nButtonSize)
 573             infoPtr->nWidth += 4 * infoPtr->nButtonSize / 3;
 574         else if (delta > 0)
 575             infoPtr->nWidth +=  infoPtr->nButtonSize / 3;
 576     }
 577
 578     h = wndRect.bottom - wndRect.top + infoPtr->nButtonSize;
 579
 580     TRACE("[%p] infoPtr->nWidth set to %d\n",
 581                infoPtr->hwndSelf, infoPtr->nWidth);
 582
 583     return h;
 584 }
 585
 586 static INT
 587 PAGER_SetFixedHeight(PAGER_INFO* infoPtr)
 588 {
 589   /* Must set the non-scrollable dimension to be less than the full height/width
 590    * so that NCCalcSize is called.  The Msoft docs mention 3/4 factor for button
 591    * size, and experimentation shows that affect is almost right. */
 592
 593     RECT wndRect;
 594     INT delta, w;
 595     GetWindowRect(infoPtr->hwndSelf, &wndRect);
 596
 597     /* see what the app says for btn height */
 598     PAGER_CalcSize(infoPtr, &infoPtr->nHeight, FALSE);
 599
 600     if (infoPtr->dwStyle & CCS_NORESIZE)
 601     {
 602         delta = wndRect.bottom - wndRect.top - infoPtr->nHeight;
 603         if (delta > infoPtr->nButtonSize)
 604             infoPtr->nHeight += infoPtr->nButtonSize;
 605         else if (delta > 0)
 606             infoPtr->nHeight +=  infoPtr->nButtonSize / 3;
 607     }
 608
 609     w = wndRect.right - wndRect.left + infoPtr->nButtonSize;
 610
 611     TRACE("[%p] infoPtr->nHeight set to %d\n",
 612                infoPtr->hwndSelf, infoPtr->nHeight);
 613
 614     return w;
 615 }
 616
 617 /******************************************************************
 618  * For the PGM_RECALCSIZE message (but not the other uses in      *
 619  * this module), the native control does only the following:      *
 620  *                                                                *
 621  *    if (some condition)                                         *
 622  *          PostMessageW(hwnd, EM_FMTLINES, 0, 0);                *
 623  *    return DefWindowProcW(hwnd, PGM_RECALCSIZE, 0, 0);          *
 624  *                                                                *
 625  * When we figure out what the "some condition" is we will        *
 626  * implement that for the message processing.                     *
 627  ******************************************************************/
 628
 629 static LRESULT
 630 PAGER_RecalcSize(PAGER_INFO *infoPtr)
 631 {
 632     TRACE("[%p]\n", infoPtr->hwndSelf);
 633
 634     if (infoPtr->hwndChild)
 635     {
 636         INT scrollRange = PAGER_GetScrollRange(infoPtr);
 637
 638         if (scrollRange <= 0)
 639         {
 640             infoPtr->nPos = -1;
 641             PAGER_SetPos(infoPtr, 0, FALSE);
 642         }
 643         else
 644             PAGER_PositionChildWnd(infoPtr);
 645     }
 646
 647     return 1;
 648 }
 649
 650
 651 static COLORREF
 652 PAGER_SetBkColor (PAGER_INFO* infoPtr, COLORREF clrBk)
 653 {
 654     COLORREF clrTemp = infoPtr->clrBk;
 655
 656     infoPtr->clrBk = clrBk;
 657     TRACE("[%p] %06x\n", infoPtr->hwndSelf, infoPtr->clrBk);
 658
 659     /* the native control seems to do things this way */
 660     SetWindowPos(infoPtr->hwndSelf, 0, 0, 0, 0, 0,
 661                  SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOMOVE |
 662                  SWP_NOZORDER | SWP_NOACTIVATE);
 663
 664     RedrawWindow(infoPtr->hwndSelf, 0, 0, RDW_ERASE | RDW_INVALIDATE);
 665
 666     return clrTemp;
 667 }
 668
 669
 670 static INT
 671 PAGER_SetBorder (PAGER_INFO* infoPtr, INT iBorder)
 672 {
 673     INT nTemp = infoPtr->nBorder;
 674
 675     infoPtr->nBorder = iBorder;
 676     TRACE("[%p] %d\n", infoPtr->hwndSelf, infoPtr->nBorder);
 677
 678     PAGER_RecalcSize(infoPtr);
 679
 680     return nTemp;
 681 }
 682
 683
 684 static INT
 685 PAGER_SetButtonSize (PAGER_INFO* infoPtr, INT iButtonSize)
 686 {
 687     INT nTemp = infoPtr->nButtonSize;
 688
 689     infoPtr->nButtonSize = iButtonSize;
 690     TRACE("[%p] %d\n", infoPtr->hwndSelf, infoPtr->nButtonSize);
 691
 692     PAGER_RecalcSize(infoPtr);
 693
 694     return nTemp;
 695 }
 696
 697
 698 static LRESULT
 699 PAGER_SetChild (PAGER_INFO* infoPtr, HWND hwndChild)
 700 {
 701     INT hw;
 702
 703     infoPtr->hwndChild = IsWindow (hwndChild) ? hwndChild : 0;
 704
 705     if (infoPtr->hwndChild)
 706     {
 707         TRACE("[%p] hwndChild=%p\n", infoPtr->hwndSelf, infoPtr->hwndChild);
 708
 709         if (infoPtr->dwStyle & PGS_HORZ) {
 710             hw = PAGER_SetFixedHeight(infoPtr);
 711             /* adjust non-scrollable dimension to fit the child */
 712             SetWindowPos(infoPtr->hwndSelf, 0, 0, 0, hw, infoPtr->nHeight,
 713                          SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOZORDER |
 714                          SWP_NOSIZE | SWP_NOACTIVATE);
 715         }
 716         else {
 717             hw = PAGER_SetFixedWidth(infoPtr);
 718             /* adjust non-scrollable dimension to fit the child */
 719             SetWindowPos(infoPtr->hwndSelf, 0, 0, 0, infoPtr->nWidth, hw,
 720                          SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOZORDER |
 721                          SWP_NOSIZE | SWP_NOACTIVATE);
 722         }
 723
 724         /* position child within the page scroller */
 725         SetWindowPos(infoPtr->hwndChild, HWND_TOP,
 726                      0,0,0,0,
 727                      SWP_SHOWWINDOW | SWP_NOSIZE);  /* native is 0 */
 728
 729         infoPtr->nPos = -1;
 730         PAGER_SetPos(infoPtr, 0, FALSE);
 731     }
 732
 733     return 0;
 734 }
 735
 736 static void
 737 PAGER_Scroll(PAGER_INFO* infoPtr, INT dir)
 738 {
 739     NMPGSCROLL nmpgScroll;
 740     RECT rcWnd;
 741
 742     if (infoPtr->hwndChild)
 743     {
 744         ZeroMemory (&nmpgScroll, sizeof (NMPGSCROLL));
 745         nmpgScroll.hdr.hwndFrom = infoPtr->hwndSelf;
 746         nmpgScroll.hdr.idFrom   = GetWindowLongPtrW (infoPtr->hwndSelf, GWLP_ID);
 747         nmpgScroll.hdr.code = PGN_SCROLL;
 748
 749         GetWindowRect(infoPtr->hwndSelf, &rcWnd);
 750         GetClientRect(infoPtr->hwndSelf, &nmpgScroll.rcParent);
 751         nmpgScroll.iXpos = nmpgScroll.iYpos = 0;
 752         nmpgScroll.iDir = dir;
 753
 754         if (infoPtr->dwStyle & PGS_HORZ)
 755         {
 756             nmpgScroll.iScroll = rcWnd.right - rcWnd.left;
 757             nmpgScroll.iXpos = infoPtr->nPos;
 758         }
 759         else
 760         {
 761             nmpgScroll.iScroll = rcWnd.bottom - rcWnd.top;
 762             nmpgScroll.iYpos = infoPtr->nPos;
 763         }
 764         nmpgScroll.iScroll -= 2*infoPtr->nButtonSize;
 765
 766         SendMessageW (infoPtr->hwndNotify, WM_NOTIFY,
 767                     (WPARAM)nmpgScroll.hdr.idFrom, (LPARAM)&nmpgScroll);
 768
 769         TRACE("[%p] PGN_SCROLL returns iScroll=%d\n", infoPtr->hwndSelf, nmpgScroll.iScroll);
 770
 771         if (nmpgScroll.iScroll > 0)
 772         {
 773             infoPtr->direction = dir;
 774
 775             if (dir == PGF_SCROLLLEFT || dir == PGF_SCROLLUP)
 776                 PAGER_SetPos(infoPtr, infoPtr->nPos - nmpgScroll.iScroll, TRUE);
 777             else
 778                 PAGER_SetPos(infoPtr, infoPtr->nPos + nmpgScroll.iScroll, TRUE);
 779         }
 780         else
 781             infoPtr->direction = -1;
 782     }
 783 }
 784
 785 static LRESULT
 786 PAGER_FmtLines(const PAGER_INFO *infoPtr)
 787 {
 788     /* initiate NCCalcSize to resize client wnd and get size */
 789     SetWindowPos(infoPtr->hwndSelf, 0, 0, 0, 0, 0,
 790                  SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOMOVE |
 791                  SWP_NOZORDER | SWP_NOACTIVATE);
 792
 793     SetWindowPos(infoPtr->hwndChild, 0,
 794                  0,0,infoPtr->nWidth,infoPtr->nHeight,
 795                  0);
 796
 797     return DefWindowProcW (infoPtr->hwndSelf, EM_FMTLINES, 0, 0);
 798 }
 799
 800 static LRESULT
 801 PAGER_Create (HWND hwnd, const CREATESTRUCTW *lpcs)
 802 {
 803     PAGER_INFO *infoPtr;
 804
 805     /* allocate memory for info structure */
 806     infoPtr = (PAGER_INFO *)Alloc (sizeof(PAGER_INFO));
 807     if (!infoPtr) return -1;
 808     SetWindowLongPtrW (hwnd, 0, (DWORD_PTR)infoPtr);
 809
 810     /* set default settings */
 811     infoPtr->hwndSelf = hwnd;
 812     infoPtr->hwndChild = NULL;
 813     infoPtr->hwndNotify = lpcs->hwndParent;
 814     infoPtr->dwStyle = lpcs->style;
 815     infoPtr->clrBk = GetSysColor(COLOR_BTNFACE);
 816     infoPtr->nBorder = 0;
 817     infoPtr->nButtonSize = 12;
 818     infoPtr->nPos = 0;
 819     infoPtr->nWidth = 0;
 820     infoPtr->nHeight = 0;
 821     infoPtr->bForward = FALSE;
 822     infoPtr->bCapture = FALSE;
 823     infoPtr->TLbtnState = PGF_INVISIBLE;
 824     infoPtr->BRbtnState = PGF_INVISIBLE;
 825     infoPtr->direction = -1;
 826
 827     if (infoPtr->dwStyle & PGS_DRAGNDROP)
 828         FIXME("[%p] Drag and Drop style is not implemented yet.\n", infoPtr->hwndSelf);
 829
 830     return 0;
 831 }
 832
 833
 834 static LRESULT
 835 PAGER_Destroy (PAGER_INFO *infoPtr)
 836 {
 837     SetWindowLongPtrW (infoPtr->hwndSelf, 0, 0);
 838     Free (infoPtr);  /* free pager info data */
 839     return 0;
 840 }
 841
 842 static LRESULT
 843 PAGER_NCCalcSize(PAGER_INFO* infoPtr, WPARAM wParam, LPRECT lpRect)
 844 {
 845     RECT rcChild, rcWindow;
 846     INT scrollRange;
 847
 848     /*
 849      * lpRect points to a RECT struct.  On entry, the struct
 850      * contains the proposed wnd rectangle for the window.
 851      * On exit, the struct should contain the screen
 852      * coordinates of the corresponding window's client area.
 853      */
 854
 855     DefWindowProcW (infoPtr->hwndSelf, WM_NCCALCSIZE, wParam, (LPARAM)lpRect);
 856
 857     TRACE("orig rect=%s\n", wine_dbgstr_rect(lpRect));
 858
 859     GetWindowRect (infoPtr->hwndChild, &rcChild);
 860     MapWindowPoints (0, infoPtr->hwndSelf, (LPPOINT)&rcChild, 2); /* FIXME: RECT != 2 POINTS */
 861     GetWindowRect (infoPtr->hwndSelf, &rcWindow);
 862
 863     if (infoPtr->dwStyle & PGS_HORZ)
 864     {
 865         infoPtr->nWidth = lpRect->right - lpRect->left;
 866         PAGER_CalcSize (infoPtr, &infoPtr->nWidth, TRUE);
 867
 868         scrollRange = infoPtr->nWidth - (rcWindow.right - rcWindow.left);
 869
 870         if (infoPtr->TLbtnState && (lpRect->left + infoPtr->nButtonSize < lpRect->right))
 871             lpRect->left += infoPtr->nButtonSize;
 872         if (infoPtr->BRbtnState && (lpRect->right - infoPtr->nButtonSize > lpRect->left))
 873             lpRect->right -= infoPtr->nButtonSize;
 874     }
 875     else
 876     {
 877         infoPtr->nHeight = lpRect->bottom - lpRect->top;
 878         PAGER_CalcSize (infoPtr, &infoPtr->nHeight, FALSE);
 879
 880         scrollRange = infoPtr->nHeight - (rcWindow.bottom - rcWindow.top);
 881
 882         if (infoPtr->TLbtnState && (lpRect->top + infoPtr->nButtonSize < lpRect->bottom))
 883             lpRect->top += infoPtr->nButtonSize;
 884         if (infoPtr->BRbtnState && (lpRect->bottom - infoPtr->nButtonSize > lpRect->top))
 885             lpRect->bottom -= infoPtr->nButtonSize;
 886     }
 887
 888     TRACE("nPos=%d, nHeight=%d, window=%s\n",
 889           infoPtr->nPos, infoPtr->nHeight,
 890           wine_dbgstr_rect(&rcWindow));
 891
 892     TRACE("[%p] client rect set to %dx%d at (%d,%d) BtnState[%d,%d]\n",
 893           infoPtr->hwndSelf, lpRect->right-lpRect->left, lpRect->bottom-lpRect->top,
 894           lpRect->left, lpRect->top,
 895           infoPtr->TLbtnState, infoPtr->BRbtnState);
 896
 897     return 0;
 898 }
 899
 900 static LRESULT
 901 PAGER_NCPaint (const PAGER_INFO* infoPtr, HRGN hRgn)
 902 {
 903     RECT rcBottomRight, rcTopLeft;
 904     HDC hdc;
 905
 906     if (infoPtr->dwStyle & WS_MINIMIZE)
 907         return 0;
 908
 909     DefWindowProcW (infoPtr->hwndSelf, WM_NCPAINT, (WPARAM)hRgn, 0);
 910
 911     if (!(hdc = GetDCEx (infoPtr->hwndSelf, 0, DCX_USESTYLE | DCX_WINDOW)))
 912         return 0;
 913
 914     PAGER_GetButtonRects(infoPtr, &rcTopLeft, &rcBottomRight, FALSE);
 915
 916     PAGER_DrawButton(hdc, infoPtr->clrBk, rcTopLeft,
 917                      infoPtr->dwStyle & PGS_HORZ, TRUE, infoPtr->TLbtnState);
 918     PAGER_DrawButton(hdc, infoPtr->clrBk, rcBottomRight,
 919                      infoPtr->dwStyle & PGS_HORZ, FALSE, infoPtr->BRbtnState);
 920
 921     ReleaseDC( infoPtr->hwndSelf, hdc );
 922     return 0;
 923 }
 924
 925 static INT
 926 PAGER_HitTest (const PAGER_INFO* infoPtr, const POINT * pt)
 927 {
 928     RECT clientRect, rcTopLeft, rcBottomRight;
 929     POINT ptWindow;
 930
 931     GetClientRect (infoPtr->hwndSelf, &clientRect);
 932
 933     if (PtInRect(&clientRect, *pt))
 934     {
 935         TRACE("child\n");
 936         return -1;
 937     }
 938
 939     ptWindow = *pt;
 940     PAGER_GetButtonRects(infoPtr, &rcTopLeft, &rcBottomRight, TRUE);
 941
 942     if ((infoPtr->TLbtnState != PGF_INVISIBLE) && PtInRect(&rcTopLeft, ptWindow))
 943     {
 944         TRACE("PGB_TOPORLEFT\n");
 945         return PGB_TOPORLEFT;
 946     }
 947     else if ((infoPtr->BRbtnState != PGF_INVISIBLE) && PtInRect(&rcBottomRight, ptWindow))
 948     {
 949         TRACE("PGB_BOTTOMORRIGHT\n");
 950         return PGB_BOTTOMORRIGHT;
 951     }
 952
 953     TRACE("nowhere\n");
 954     return -1;
 955 }
 956
 957 static LRESULT
 958 PAGER_NCHitTest (const PAGER_INFO* infoPtr, INT x, INT y)
 959 {
 960     POINT pt;
 961     INT nHit;
 962
 963     pt.x = x;
 964     pt.y = y;
 965
 966     ScreenToClient (infoPtr->hwndSelf, &pt);
 967     nHit = PAGER_HitTest(infoPtr, &pt);
 968
 969     return (nHit < 0) ? HTTRANSPARENT : HTCLIENT;
 970 }
 971
 972 static LRESULT
 973 PAGER_MouseMove (PAGER_INFO* infoPtr, INT keys, INT x, INT y)
 974 {
 975     POINT clpt, pt;
 976     RECT wnrect, *btnrect = NULL;
 977     BOOL topLeft = FALSE;
 978     INT btnstate = 0;
 979     INT hit;
 980     HDC hdc;
 981
 982     pt.x = x;
 983     pt.y = y;
 984
 985     TRACE("[%p] to (%d,%d)\n", infoPtr->hwndSelf, x, y);
 986     ClientToScreen(infoPtr->hwndSelf, &pt);
 987     GetWindowRect(infoPtr->hwndSelf, &wnrect);
 988     if (PtInRect(&wnrect, pt)) {
 989         RECT TLbtnrect, BRbtnrect;
 990         PAGER_GetButtonRects(infoPtr, &TLbtnrect, &BRbtnrect, FALSE);
 991
 992         clpt = pt;
 993         MapWindowPoints(0, infoPtr->hwndSelf, &clpt, 1);
 994         hit = PAGER_HitTest(infoPtr, &clpt);
 995         if ((hit == PGB_TOPORLEFT) && (infoPtr->TLbtnState == PGF_NORMAL))
 996         {
 997             topLeft = TRUE;
 998             btnrect = &TLbtnrect;
 999             infoPtr->TLbtnState = PGF_HOT;
1000             btnstate = infoPtr->TLbtnState;
1001         }
1002         else if ((hit == PGB_BOTTOMORRIGHT) && (infoPtr->BRbtnState == PGF_NORMAL))
1003         {
1004             topLeft = FALSE;
1005             btnrect = &BRbtnrect;
1006             infoPtr->BRbtnState = PGF_HOT;
1007             btnstate = infoPtr->BRbtnState;
1008         }
1009
1010         /* If in one of the buttons the capture and draw buttons */
1011         if (btnrect)
1012         {
1013             TRACE("[%p] draw btn (%d,%d)-(%d,%d), Capture %s, style %08x\n",
1014                   infoPtr->hwndSelf, btnrect->left, btnrect->top,
1015                   btnrect->right, btnrect->bottom,
1016                   (infoPtr->bCapture) ? "TRUE" : "FALSE",
1017                   infoPtr->dwStyle);
1018             if (!infoPtr->bCapture)
1019             {
1020                 TRACE("[%p] SetCapture\n", infoPtr->hwndSelf);
1021                 SetCapture(infoPtr->hwndSelf);
1022                 infoPtr->bCapture = TRUE;
1023             }
1024             if (infoPtr->dwStyle & PGS_AUTOSCROLL)
1025                 SetTimer(infoPtr->hwndSelf, TIMERID1, 0x3e, 0);
1026             hdc = GetWindowDC(infoPtr->hwndSelf);
1027             /* OffsetRect(wnrect, 0 | 1, 0 | 1) */
1028             PAGER_DrawButton(hdc, infoPtr->clrBk, *btnrect,
1029                              infoPtr->dwStyle & PGS_HORZ, topLeft, btnstate);
1030             ReleaseDC(infoPtr->hwndSelf, hdc);
1031             return 0;
1032         }
1033     }
1034
1035     /* If we think we are captured, then do release */
1036     if (infoPtr->bCapture && (WindowFromPoint(pt) != infoPtr->hwndSelf))
1037     {
1038         NMHDR nmhdr;
1039
1040         infoPtr->bCapture = FALSE;
1041
1042         if (GetCapture() == infoPtr->hwndSelf)
1043         {
1044             ReleaseCapture();
1045
1046             if (infoPtr->TLbtnState == PGF_GRAYED)
1047             {
1048                 infoPtr->TLbtnState = PGF_INVISIBLE;
1049                 SetWindowPos(infoPtr->hwndSelf, 0, 0, 0, 0, 0,
1050                              SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOMOVE |
1051                              SWP_NOZORDER | SWP_NOACTIVATE);
1052             }
1053             else if (infoPtr->TLbtnState == PGF_HOT)
1054             {
1055                 infoPtr->TLbtnState = PGF_NORMAL;
1056                 /* FIXME: just invalidate button rect */
1057                 RedrawWindow(infoPtr->hwndSelf, NULL, NULL, RDW_FRAME | RDW_INVALIDATE);
1058             }
1059
1060             if (infoPtr->BRbtnState == PGF_GRAYED)
1061             {
1062                 infoPtr->BRbtnState = PGF_INVISIBLE;
1063                 SetWindowPos(infoPtr->hwndSelf, 0, 0, 0, 0, 0,
1064                              SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOMOVE |
1065                              SWP_NOZORDER | SWP_NOACTIVATE);
1066             }
1067             else if (infoPtr->BRbtnState == PGF_HOT)
1068             {
1069                 infoPtr->BRbtnState = PGF_NORMAL;
1070                 /* FIXME: just invalidate button rect */
1071                 RedrawWindow(infoPtr->hwndSelf, NULL, NULL, RDW_FRAME | RDW_INVALIDATE);
1072             }
1073
1074             /* Notify parent of released mouse capture */
1075                 memset(&nmhdr, 0, sizeof(NMHDR));
1076                 nmhdr.hwndFrom = infoPtr->hwndSelf;
1077                 nmhdr.idFrom   = GetWindowLongPtrW(infoPtr->hwndSelf, GWLP_ID);
1078                 nmhdr.code = NM_RELEASEDCAPTURE;
1079                 SendMessageW(infoPtr->hwndNotify, WM_NOTIFY,
1080                          (WPARAM)nmhdr.idFrom, (LPARAM)&nmhdr);
1081         }
1082         if (IsWindow(infoPtr->hwndSelf))
1083             KillTimer(infoPtr->hwndSelf, TIMERID1);
1084     }
1085     return 0;
1086 }
1087
1088 static LRESULT
1089 PAGER_LButtonDown (PAGER_INFO* infoPtr, INT keys, INT x, INT y)
1090 {
1091     BOOL repaintBtns = FALSE;
1092     POINT pt;
1093     INT hit;
1094
1095     pt.x = x;
1096     pt.y = y;
1097
1098     TRACE("[%p] at (%d,%d)\n", infoPtr->hwndSelf, x, y);
1099
1100     hit = PAGER_HitTest(infoPtr, &pt);
1101
1102     /* put btn in DEPRESSED state */
1103     if (hit == PGB_TOPORLEFT)
1104     {
1105         repaintBtns = infoPtr->TLbtnState != PGF_DEPRESSED;
1106         infoPtr->TLbtnState = PGF_DEPRESSED;
1107         SetTimer(infoPtr->hwndSelf, TIMERID1, INITIAL_DELAY, 0);
1108     }
1109     else if (hit == PGB_BOTTOMORRIGHT)
1110     {
1111         repaintBtns = infoPtr->BRbtnState != PGF_DEPRESSED;
1112         infoPtr->BRbtnState = PGF_DEPRESSED;
1113         SetTimer(infoPtr->hwndSelf, TIMERID1, INITIAL_DELAY, 0);
1114     }
1115
1116     if (repaintBtns)
1117         SendMessageW(infoPtr->hwndSelf, WM_NCPAINT, 0, 0);
1118
1119     switch(hit)
1120     {
1121     case PGB_TOPORLEFT:
1122         if (infoPtr->dwStyle & PGS_HORZ)
1123         {
1124             TRACE("[%p] PGF_SCROLLLEFT\n", infoPtr->hwndSelf);
1125             PAGER_Scroll(infoPtr, PGF_SCROLLLEFT);
1126         }
1127         else
1128         {
1129             TRACE("[%p] PGF_SCROLLUP\n", infoPtr->hwndSelf);
1130             PAGER_Scroll(infoPtr, PGF_SCROLLUP);
1131         }
1132         break;
1133     case PGB_BOTTOMORRIGHT:
1134         if (infoPtr->dwStyle & PGS_HORZ)
1135         {
1136             TRACE("[%p] PGF_SCROLLRIGHT\n", infoPtr->hwndSelf);
1137             PAGER_Scroll(infoPtr, PGF_SCROLLRIGHT);
1138         }
1139         else
1140         {
1141             TRACE("[%p] PGF_SCROLLDOWN\n", infoPtr->hwndSelf);
1142             PAGER_Scroll(infoPtr, PGF_SCROLLDOWN);
1143         }
1144         break;
1145     default:
1146         break;
1147     }
1148
1149     return 0;
1150 }
1151
1152 static LRESULT
1153 PAGER_LButtonUp (PAGER_INFO* infoPtr, INT keys, INT x, INT y)
1154 {
1155     TRACE("[%p]\n", infoPtr->hwndSelf);
1156
1157     KillTimer (infoPtr->hwndSelf, TIMERID1);
1158     KillTimer (infoPtr->hwndSelf, TIMERID2);
1159
1160     /* make PRESSED btns NORMAL but don't hide gray btns */
1161     if (infoPtr->TLbtnState & (PGF_HOT | PGF_DEPRESSED))
1162         infoPtr->TLbtnState = PGF_NORMAL;
1163     if (infoPtr->BRbtnState & (PGF_HOT | PGF_DEPRESSED))
1164         infoPtr->BRbtnState = PGF_NORMAL;
1165
1166     return 0;
1167 }
1168
1169 static LRESULT
1170 PAGER_Timer (PAGER_INFO* infoPtr, INT nTimerId)
1171 {
1172     INT dir;
1173
1174     /* if initial timer, kill it and start the repeat timer */
1175     if (nTimerId == TIMERID1) {
1176         if (infoPtr->TLbtnState == PGF_HOT)
1177             dir = (infoPtr->dwStyle & PGS_HORZ) ?
1178                 PGF_SCROLLLEFT : PGF_SCROLLUP;
1179         else
1180             dir = (infoPtr->dwStyle & PGS_HORZ) ?
1181                 PGF_SCROLLRIGHT : PGF_SCROLLDOWN;
1182         TRACE("[%p] TIMERID1: style=%08x, dir=%d\n",
1183               infoPtr->hwndSelf, infoPtr->dwStyle, dir);
1184         KillTimer(infoPtr->hwndSelf, TIMERID1);
1185         SetTimer(infoPtr->hwndSelf, TIMERID1, REPEAT_DELAY, 0);
1186         if (infoPtr->dwStyle & PGS_AUTOSCROLL) {
1187             PAGER_Scroll(infoPtr, dir);
1188             SetWindowPos(infoPtr->hwndSelf, 0, 0, 0, 0, 0,
1189                          SWP_FRAMECHANGED | SWP_NOSIZE | SWP_NOMOVE |
1190                          SWP_NOZORDER | SWP_NOACTIVATE);
1191         }
1192         return 0;
1193
1194     }
1195
1196     TRACE("[%p] TIMERID2: dir=%d\n", infoPtr->hwndSelf, infoPtr->direction);
1197     KillTimer(infoPtr->hwndSelf, TIMERID2);
1198     if (infoPtr->direction > 0) {
1199         PAGER_Scroll(infoPtr, infoPtr->direction);
1200         SetTimer(infoPtr->hwndSelf, TIMERID2, REPEAT_DELAY, 0);
1201     }
1202     return 0;
1203 }
1204
1205 static LRESULT
1206 PAGER_EraseBackground (const PAGER_INFO* infoPtr, HDC hdc)
1207 {
1208     POINT pt, ptorig;
1209     HWND parent;
1210
1211     pt.x = 0;
1212     pt.y = 0;
1213     parent = GetParent(infoPtr->hwndSelf);
1214     MapWindowPoints(infoPtr->hwndSelf, parent, &pt, 1);
1215     OffsetWindowOrgEx (hdc, pt.x, pt.y, &ptorig);
1216     SendMessageW (parent, WM_ERASEBKGND, (WPARAM)hdc, 0);
1217     SetWindowOrgEx (hdc, ptorig.x, ptorig.y, 0);
1218
1219     return 0;
1220 }
1221
1222
1223 static LRESULT
1224 PAGER_Size (PAGER_INFO* infoPtr, INT type, INT x, INT y)
1225 {
1226     /* note that WM_SIZE is sent whenever NCCalcSize resizes the client wnd */
1227
1228     TRACE("[%p] %d,%d\n", infoPtr->hwndSelf, x, y);
1229
1230     if (infoPtr->dwStyle & PGS_HORZ)
1231         infoPtr->nHeight = y;
1232     else
1233         infoPtr->nWidth = x;
1234
1235     return PAGER_RecalcSize(infoPtr);
1236 }
1237
1238
1239 static LRESULT
1240 PAGER_StyleChanged(PAGER_INFO *infoPtr, WPARAM wStyleType, const STYLESTRUCT *lpss)
1241 {
1242     DWORD oldStyle = infoPtr->dwStyle;
1243
1244     TRACE("(styletype=%lx, styleOld=0x%08x, styleNew=0x%08x)\n",
1245           wStyleType, lpss->styleOld, lpss->styleNew);
1246
1247     if (wStyleType != GWL_STYLE) return 0;
1248
1249     infoPtr->dwStyle = lpss->styleNew;
1250
1251     if ((oldStyle ^ lpss->styleNew) & (PGS_HORZ | PGS_VERT))
1252     {
1253         PAGER_RecalcSize(infoPtr);
1254     }
1255
1256     return 0;
1257 }
1258
1259 static LRESULT WINAPI
1260 PAGER_WindowProc (HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
1261 {
1262     PAGER_INFO *infoPtr = (PAGER_INFO *)GetWindowLongPtrW(hwnd, 0);
1263
1264     if (!infoPtr && (uMsg != WM_CREATE))
1265         return DefWindowProcW (hwnd, uMsg, wParam, lParam);
1266
1267     switch (uMsg)
1268     {
1269         case EM_FMTLINES:
1270             return PAGER_FmtLines(infoPtr);
1271
1272         case PGM_FORWARDMOUSE:
1273             return PAGER_ForwardMouse (infoPtr, (BOOL)wParam);
1274
1275         case PGM_GETBKCOLOR:
1276             return PAGER_GetBkColor(infoPtr);
1277
1278         case PGM_GETBORDER:
1279             return PAGER_GetBorder(infoPtr);
1280
1281         case PGM_GETBUTTONSIZE:
1282             return PAGER_GetButtonSize(infoPtr);
1283
1284         case PGM_GETPOS:
1285             return PAGER_GetPos(infoPtr);
1286
1287         case PGM_GETBUTTONSTATE:
1288             return PAGER_GetButtonState (infoPtr, (INT)lParam);
1289
1290 /*      case PGM_GETDROPTARGET: */
1291
1292         case PGM_RECALCSIZE:
1293             return PAGER_RecalcSize(infoPtr);
1294
1295         case PGM_SETBKCOLOR:
1296             return PAGER_SetBkColor (infoPtr, (COLORREF)lParam);
1297
1298         case PGM_SETBORDER:
1299             return PAGER_SetBorder (infoPtr, (INT)lParam);
1300
1301         case PGM_SETBUTTONSIZE:
1302             return PAGER_SetButtonSize (infoPtr, (INT)lParam);
1303
1304         case PGM_SETCHILD:
1305             return PAGER_SetChild (infoPtr, (HWND)lParam);
1306
1307         case PGM_SETPOS:
1308             return PAGER_SetPos(infoPtr, (INT)lParam, FALSE);
1309
1310         case WM_CREATE:
1311             return PAGER_Create (hwnd, (LPCREATESTRUCTW)lParam);
1312
1313         case WM_DESTROY:
1314             return PAGER_Destroy (infoPtr);
1315
1316         case WM_SIZE:
1317             return PAGER_Size (infoPtr, (INT)wParam, (short)LOWORD(lParam), (short)HIWORD(lParam));
1318
1319         case WM_NCPAINT:
1320             return PAGER_NCPaint (infoPtr, (HRGN)wParam);
1321
1322         case WM_WINDOWPOSCHANGING:
1323             return PAGER_WindowPosChanging (infoPtr, (WINDOWPOS*)lParam);
1324
1325         case WM_STYLECHANGED:
1326             return PAGER_StyleChanged(infoPtr, wParam, (LPSTYLESTRUCT)lParam);
1327
1328         case WM_NCCALCSIZE:
1329             return PAGER_NCCalcSize (infoPtr, wParam, (LPRECT)lParam);
1330
1331         case WM_NCHITTEST:
1332             return PAGER_NCHitTest (infoPtr, (short)LOWORD(lParam), (short)HIWORD(lParam));
1333
1334         case WM_MOUSEMOVE:
1335             if (infoPtr->bForward && infoPtr->hwndChild)
1336                 PostMessageW(infoPtr->hwndChild, WM_MOUSEMOVE, wParam, lParam);
1337             return PAGER_MouseMove (infoPtr, (INT)wParam, (short)LOWORD(lParam), (short)HIWORD(lParam));
1338
1339         case WM_LBUTTONDOWN:
1340             return PAGER_LButtonDown (infoPtr, (INT)wParam, (short)LOWORD(lParam), (short)HIWORD(lParam));
1341
1342         case WM_LBUTTONUP:
1343             return PAGER_LButtonUp (infoPtr, (INT)wParam, (short)LOWORD(lParam), (short)HIWORD(lParam));
1344
1345         case WM_ERASEBKGND:
1346             return PAGER_EraseBackground (infoPtr, (HDC)wParam);
1347
1348         case WM_TIMER:
1349             return PAGER_Timer (infoPtr, (INT)wParam);
1350
1351         case WM_NOTIFY:
1352         case WM_COMMAND:
1353             return SendMessageW (infoPtr->hwndNotify, uMsg, wParam, lParam);
1354
1355         default:
1356             return DefWindowProcW (hwnd, uMsg, wParam, lParam);
1357     }
1358 }
1359
1360
1361 VOID
1362 PAGER_Register (void)
1363 {
1364     WNDCLASSW wndClass;
1365
1366     ZeroMemory (&wndClass, sizeof(WNDCLASSW));
1367     wndClass.style         = CS_GLOBALCLASS;
1368     wndClass.lpfnWndProc   = PAGER_WindowProc;
1369     wndClass.cbClsExtra    = 0;
1370     wndClass.cbWndExtra    = sizeof(PAGER_INFO *);
1371     wndClass.hCursor       = LoadCursorW (0, (LPWSTR)IDC_ARROW);
1372     wndClass.hbrBackground = (HBRUSH)(COLOR_BTNFACE+1);
1373     wndClass.lpszClassName = WC_PAGESCROLLERW;
1374
1375     RegisterClassW (&wndClass);
1376 }
1377
1378
1379 VOID
1380 PAGER_Unregister (void)
1381 {
1382     UnregisterClassW (WC_PAGESCROLLERW, NULL);
1383 }