dll/cpl/desk/preview.c

   1 /*
   2  * PROJECT:     ReactOS Desktop Control Panel
   3  * LICENSE:     GPL - See COPYING in the top level directory
   4  * FILE:        lib/cpl/desk/preview.c
   5  * PURPOSE:     Draws the preview control
   6  * COPYRIGHT:   Copyright 2006, 2007 Eric Kohl
   7  */
   8
   9 #include "desk.h"
  10 #include "theme.h"
  11 #include "preview.h"
  12 #include "draw.h"
  13
  14 static const TCHAR szPreviewWndClass[] = TEXT("PreviewWndClass");
  15
  16 typedef struct _PREVIEW_DATA
  17 {
  18     HWND hwndParent;
  19
  20     THEME Theme;
  21
  22     HBRUSH hbrScrollbar;
  23     HBRUSH hbrDesktop;
  24     HBRUSH hbrWindow;
  25
  26     INT cxEdge;
  27     INT cyEdge;
  28
  29     INT cySizeFrame;
  30
  31     INT cyCaption;
  32     INT cyBorder;
  33     INT cyMenu;
  34     INT cxScrollbar;
  35
  36     RECT rcDesktop;
  37     RECT rcInactiveFrame;
  38     RECT rcInactiveCaption;
  39     RECT rcInactiveCaptionButtons;
  40
  41     RECT rcActiveFrame;
  42     RECT rcActiveCaption;
  43     RECT rcActiveCaptionButtons;
  44     RECT rcActiveMenuBar;
  45     RECT rcSelectedMenuItem;
  46     RECT rcActiveClient;
  47     RECT rcActiveScroll;
  48
  49     RECT rcDialogFrame;
  50     RECT rcDialogCaption;
  51     RECT rcDialogCaptionButtons;
  52     RECT rcDialogClient;
  53
  54     RECT rcDialogButton;
  55
  56     LPTSTR lpInAct;
  57     LPTSTR lpAct;
  58     LPTSTR lpWinTxt;
  59     LPTSTR lpMessBox;
  60     LPTSTR lpMessText;
  61     LPTSTR lpButText;
  62
  63     HFONT hCaptionFont;
  64     HFONT hMenuFont;
  65     HFONT hMessageFont;
  66     HFONT hClientFont;
  67
  68     HMENU hMenu;
  69
  70 } PREVIEW_DATA, *PPREVIEW_DATA;
  71
  72
  73 static VOID UpdatePreviewTheme(HWND hwnd, PPREVIEW_DATA pPreviewData, THEME *theme)
  74 {
  75     if (pPreviewData->hbrScrollbar != NULL)
  76         DeleteObject(pPreviewData->hbrScrollbar);
  77     pPreviewData->hbrScrollbar = CreateSolidBrush(theme->crColor[COLOR_SCROLLBAR]);
  78     if (pPreviewData->hbrDesktop != NULL)
  79         DeleteObject(pPreviewData->hbrDesktop);
  80
  81     pPreviewData->hbrDesktop = CreateSolidBrush(theme->crColor[COLOR_DESKTOP]);
  82     if (pPreviewData->hbrWindow != NULL)
  83         DeleteObject(pPreviewData->hbrWindow);
  84     pPreviewData->hbrWindow = CreateSolidBrush(theme->crColor[COLOR_WINDOW]);
  85
  86     pPreviewData->cxEdge = theme->Size[SIZE_EDGE_X] - 2;        /* SM_CXEDGE */
  87     pPreviewData->cyEdge = theme->Size[SIZE_EDGE_Y] - 2;        /* SM_CYEDGE */
  88
  89     pPreviewData->cySizeFrame = theme->Size[SIZE_FRAME_Y] - 1;  /* SM_CYSIZEFRAME */
  90
  91     pPreviewData->cyCaption = theme->Size[SIZE_CAPTION_Y];      /* SM_CYCAPTION */
  92     pPreviewData->cyMenu = theme->Size[SIZE_MENU_Y];            /* SM_CYMENU */
  93     pPreviewData->cxScrollbar = theme->Size[SIZE_SCROLL_X];     /* SM_CXVSCROLL */
  94     pPreviewData->cyBorder = theme->Size[SIZE_BORDER_Y];        /* SM_CYBORDER */
  95
  96     if (pPreviewData->hCaptionFont != NULL)
  97         DeleteObject(pPreviewData->hCaptionFont);
  98     pPreviewData->hCaptionFont = CreateFontIndirect(&theme->lfFont[FONT_CAPTION]);
  99
 100     if (pPreviewData->hMenuFont != NULL)
 101         DeleteObject(pPreviewData->hMenuFont);
 102     pPreviewData->hMenuFont = CreateFontIndirect(&theme->lfFont[FONT_MENU]);
 103
 104     if (pPreviewData->hMessageFont != NULL)
 105         DeleteObject(pPreviewData->hMessageFont);
 106     pPreviewData->hMessageFont = CreateFontIndirect(&theme->lfFont[FONT_DIALOG]);
 107
 108     pPreviewData->Theme = *theme;
 109     InvalidateRect(hwnd, NULL, FALSE);
 110 }
 111
 112 static VOID
 113 OnCreate(HWND hwnd, PPREVIEW_DATA pPreviewData)
 114 {
 115     THEME *theme;
 116
 117     pPreviewData->hClientFont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
 118
 119     /* Load and modify the menu */
 120     pPreviewData->hMenu = LoadMenu(hApplet, MAKEINTRESOURCE(IDR_PREVIEW_MENU));
 121     EnableMenuItem(pPreviewData->hMenu,
 122                    1, MF_BYPOSITION | MF_GRAYED);
 123     HiliteMenuItem(hwnd, pPreviewData->hMenu,
 124                    2, MF_BYPOSITION | MF_HILITE);
 125
 126 //    GetMenuItemRect(hwnd, pPreviewData->hMenu,
 127 //                    2, &pPreviewData->rcSelectedMenuItem);
 128
 129     AllocAndLoadString(&pPreviewData->lpInAct, hApplet, IDS_INACTWIN);
 130     AllocAndLoadString(&pPreviewData->lpAct, hApplet, IDS_ACTWIN);
 131     AllocAndLoadString(&pPreviewData->lpWinTxt, hApplet, IDS_WINTEXT);
 132     AllocAndLoadString(&pPreviewData->lpMessBox, hApplet, IDS_MESSBOX);
 133     AllocAndLoadString(&pPreviewData->lpMessText, hApplet, IDS_MESSTEXT);
 134     AllocAndLoadString(&pPreviewData->lpButText, hApplet, IDS_BUTTEXT);
 135
 136     theme = &pPreviewData->Theme;
 137     LoadCurrentTheme(theme);
 138
 139     UpdatePreviewTheme(hwnd, pPreviewData, theme);
 140 }
 141
 142
 143 static VOID
 144 CalculateItemSize(PPREVIEW_DATA pPreviewData)
 145 {
 146     int width, height;
 147
 148     /* Calculate the inactive window rectangle */
 149     pPreviewData->rcInactiveFrame.left = pPreviewData->rcDesktop.left + 8;
 150     pPreviewData->rcInactiveFrame.top = pPreviewData->rcDesktop.top + 8;
 151     pPreviewData->rcInactiveFrame.right = pPreviewData->rcDesktop.right - 25;
 152     pPreviewData->rcInactiveFrame.bottom = pPreviewData->rcDesktop.bottom - 30;
 153
 154     /* Calculate the inactive caption rectangle */
 155     pPreviewData->rcInactiveCaption.left = pPreviewData->rcInactiveFrame.left + pPreviewData->cxEdge + pPreviewData->cySizeFrame + 1;
 156     pPreviewData->rcInactiveCaption.top = pPreviewData->rcInactiveFrame.top + pPreviewData->cyEdge + pPreviewData->cySizeFrame + 1;
 157     pPreviewData->rcInactiveCaption.right = pPreviewData->rcInactiveFrame.right - pPreviewData->cxEdge - pPreviewData->cySizeFrame - 1;
 158     pPreviewData->rcInactiveCaption.bottom = pPreviewData->rcInactiveCaption.top + pPreviewData->cyCaption - pPreviewData->cyBorder;
 159
 160     /* Calculate the inactive caption buttons rectangle */
 161     pPreviewData->rcInactiveCaptionButtons.left = pPreviewData->rcInactiveCaption.right - 2 - 2 - 3 * 16;
 162     pPreviewData->rcInactiveCaptionButtons.top = pPreviewData->rcInactiveCaption.top + 2;
 163     pPreviewData->rcInactiveCaptionButtons.right = pPreviewData->rcInactiveCaption.right - 2;
 164     pPreviewData->rcInactiveCaptionButtons.bottom = pPreviewData->rcInactiveCaption.bottom - 2;
 165
 166     /* Calculate the active window rectangle */
 167     pPreviewData->rcActiveFrame.left = pPreviewData->rcInactiveFrame.left + 3 + pPreviewData->cySizeFrame;
 168     pPreviewData->rcActiveFrame.top = pPreviewData->rcInactiveCaption.bottom + 1;
 169     pPreviewData->rcActiveFrame.right = pPreviewData->rcDesktop.right - 10;
 170     pPreviewData->rcActiveFrame.bottom = pPreviewData->rcDesktop.bottom - 25;
 171
 172     /* Calculate the active caption rectangle */
 173     pPreviewData->rcActiveCaption.left = pPreviewData->rcActiveFrame.left + pPreviewData->cxEdge + pPreviewData->cySizeFrame + 1;
 174     pPreviewData->rcActiveCaption.top = pPreviewData->rcActiveFrame.top + pPreviewData->cxEdge + pPreviewData->cySizeFrame + 1;
 175     pPreviewData->rcActiveCaption.right = pPreviewData->rcActiveFrame.right - pPreviewData->cxEdge - pPreviewData->cySizeFrame - 1;
 176     pPreviewData->rcActiveCaption.bottom = pPreviewData->rcActiveCaption.top + pPreviewData->cyCaption - pPreviewData->cyBorder;
 177
 178     /* Calculate the active caption buttons rectangle */
 179     pPreviewData->rcActiveCaptionButtons.left = pPreviewData->rcActiveCaption.right - 2 - 2 - 3 * 16;
 180     pPreviewData->rcActiveCaptionButtons.top = pPreviewData->rcActiveCaption.top + 2;
 181     pPreviewData->rcActiveCaptionButtons.right = pPreviewData->rcActiveCaption.right - 2;
 182     pPreviewData->rcActiveCaptionButtons.bottom = pPreviewData->rcActiveCaption.bottom - 2;
 183
 184     /* Calculate the active menu bar rectangle */
 185     pPreviewData->rcActiveMenuBar.left = pPreviewData->rcActiveFrame.left + pPreviewData->cxEdge + pPreviewData->cySizeFrame + 1;
 186     pPreviewData->rcActiveMenuBar.top = pPreviewData->rcActiveCaption.bottom + 1;
 187     pPreviewData->rcActiveMenuBar.right = pPreviewData->rcActiveFrame.right - pPreviewData->cxEdge - pPreviewData->cySizeFrame - 1;
 188     pPreviewData->rcActiveMenuBar.bottom = pPreviewData->rcActiveMenuBar.top + pPreviewData->cyMenu + 1;
 189
 190     /* Calculate the active client rectangle */
 191     pPreviewData->rcActiveClient.left = pPreviewData->rcActiveFrame.left + pPreviewData->cxEdge + pPreviewData->cySizeFrame + 1;
 192     pPreviewData->rcActiveClient.top = pPreviewData->rcActiveMenuBar.bottom;
 193     pPreviewData->rcActiveClient.right = pPreviewData->rcActiveFrame.right - pPreviewData->cxEdge - pPreviewData->cySizeFrame - 1;
 194     pPreviewData->rcActiveClient.bottom = pPreviewData->rcActiveFrame.bottom - pPreviewData->cyEdge - pPreviewData->cySizeFrame - 1;
 195
 196     /* Calculate the active scroll rectangle */
 197     pPreviewData->rcActiveScroll.left = pPreviewData->rcActiveClient.right - 2 - pPreviewData->cxScrollbar;
 198     pPreviewData->rcActiveScroll.top = pPreviewData->rcActiveClient.top + 2;
 199     pPreviewData->rcActiveScroll.right = pPreviewData->rcActiveClient.right - 2;
 200     pPreviewData->rcActiveScroll.bottom = pPreviewData->rcActiveClient.bottom - 2;
 201
 202
 203     /* Dialog window */
 204     pPreviewData->rcDialogFrame.left = pPreviewData->rcActiveClient.left + 4;
 205     pPreviewData->rcDialogFrame.top = (pPreviewData->rcDesktop.bottom * 60) / 100;
 206     pPreviewData->rcDialogFrame.right = (pPreviewData->rcDesktop.right * 65) / 100;
 207     pPreviewData->rcDialogFrame.bottom = pPreviewData->rcDesktop.bottom - 5;
 208
 209     /* Calculate the dialog caption rectangle */
 210     pPreviewData->rcDialogCaption.left = pPreviewData->rcDialogFrame.left + 3;
 211     pPreviewData->rcDialogCaption.top = pPreviewData->rcDialogFrame.top + 3;
 212     pPreviewData->rcDialogCaption.right = pPreviewData->rcDialogFrame.right - 3;
 213     pPreviewData->rcDialogCaption.bottom = pPreviewData->rcDialogFrame.top + pPreviewData->cyCaption + 1 + 1;
 214
 215     /* Calculate the inactive caption buttons rectangle */
 216     pPreviewData->rcDialogCaptionButtons.left = pPreviewData->rcDialogCaption.right - 2 - 16;
 217     pPreviewData->rcDialogCaptionButtons.top = pPreviewData->rcDialogCaption.top + 2;
 218     pPreviewData->rcDialogCaptionButtons.right = pPreviewData->rcDialogCaption.right - 2;
 219     pPreviewData->rcDialogCaptionButtons.bottom = pPreviewData->rcDialogCaption.bottom - 2;
 220
 221     /* Calculate the dialog client rectangle */
 222     pPreviewData->rcDialogClient.left = pPreviewData->rcDialogFrame.left + 3;
 223     pPreviewData->rcDialogClient.top = pPreviewData->rcDialogCaption.bottom + 1;
 224     pPreviewData->rcDialogClient.right = pPreviewData->rcDialogFrame.right - 3;
 225     pPreviewData->rcDialogClient.bottom = pPreviewData->rcDialogFrame.bottom - 3;
 226
 227     /* Calculate the dialog button rectangle */
 228     width = 80;
 229     height = 28;
 230
 231     pPreviewData->rcDialogButton.left =
 232         (pPreviewData->rcDialogClient.right + pPreviewData->rcDialogClient.left - width) / 2;
 233     pPreviewData->rcDialogButton.right = pPreviewData->rcDialogButton.left + width;
 234     pPreviewData->rcDialogButton.bottom = pPreviewData->rcDialogClient.bottom - 2;
 235     pPreviewData->rcDialogButton.top = pPreviewData->rcDialogButton.bottom - height;
 236 }
 237
 238
 239 static VOID
 240 OnSize(INT cx, INT cy, PPREVIEW_DATA pPreviewData)
 241 {
 242     /* Get Desktop rectangle */
 243     pPreviewData->rcDesktop.left = 0;
 244     pPreviewData->rcDesktop.top = 0;
 245     pPreviewData->rcDesktop.right = cx;
 246     pPreviewData->rcDesktop.bottom = cy;
 247
 248     CalculateItemSize(pPreviewData);
 249 }
 250
 251 static VOID
 252 OnPaint(HWND hwnd, PPREVIEW_DATA pPreviewData)
 253 {
 254     PAINTSTRUCT ps;
 255     HFONT hOldFont;
 256     HDC hdc;
 257     RECT rc;
 258     THEME *theme;
 259
 260     theme = &pPreviewData->Theme;
 261
 262     hdc = BeginPaint(hwnd, &ps);
 263
 264     /* Desktop */
 265     FillRect(hdc, &pPreviewData->rcDesktop, pPreviewData->hbrDesktop);
 266
 267     /* Inactive Window */
 268     MyDrawEdge(hdc, &pPreviewData->rcInactiveFrame, EDGE_RAISED, BF_RECT | BF_MIDDLE, theme);
 269     SetTextColor(hdc, theme->crColor[COLOR_INACTIVECAPTIONTEXT]);
 270     MyDrawCaptionTemp(NULL, hdc, &pPreviewData->rcInactiveCaption,  pPreviewData->hCaptionFont,
 271                       NULL, pPreviewData->lpInAct, DC_GRADIENT | DC_ICON | DC_TEXT, theme);
 272     MyDrawCaptionButtons(hdc, &pPreviewData->rcInactiveCaption, TRUE, pPreviewData->cyCaption - 2, theme);
 273
 274     /* Active Window */
 275     MyDrawEdge(hdc, &pPreviewData->rcActiveFrame, EDGE_RAISED, BF_RECT | BF_MIDDLE, theme);
 276     SetTextColor(hdc, theme->crColor[COLOR_CAPTIONTEXT]);
 277     MyDrawCaptionTemp(NULL, hdc, &pPreviewData->rcActiveCaption, pPreviewData->hCaptionFont,
 278                       NULL, pPreviewData->lpAct, DC_ACTIVE | DC_GRADIENT | DC_ICON | DC_TEXT, theme);
 279     MyDrawCaptionButtons(hdc, &pPreviewData->rcActiveCaption, TRUE, pPreviewData->cyCaption - 2, theme);
 280
 281     /* Draw the menu bar */
 282     MyDrawMenuBarTemp(hwnd, hdc, &pPreviewData->rcActiveMenuBar,
 283                       pPreviewData->hMenu,
 284                       pPreviewData->hMenuFont, theme);
 285
 286     /* Draw the client area */
 287     CopyRect(&rc, &pPreviewData->rcActiveClient);
 288     MyDrawEdge(hdc, &rc, EDGE_SUNKEN, BF_RECT | BF_ADJUST, theme);
 289     FillRect(hdc, &rc, pPreviewData->hbrWindow);
 290
 291     /* Draw the client text */
 292     CopyRect(&rc, &pPreviewData->rcActiveClient);
 293     rc.left += 4;
 294     rc.top += 2;
 295     SetTextColor(hdc, theme->crColor[COLOR_WINDOWTEXT]);
 296     hOldFont = SelectObject(hdc, pPreviewData->hClientFont);
 297     DrawText(hdc, pPreviewData->lpWinTxt, -1, &rc, DT_LEFT);
 298     SelectObject(hdc, hOldFont);
 299
 300     /* Draw the scroll bar */
 301     MyDrawScrollbar(hdc, &pPreviewData->rcActiveScroll, pPreviewData->hbrScrollbar, theme);
 302
 303     /* Dialog Window */
 304     MyDrawEdge(hdc, &pPreviewData->rcDialogFrame, EDGE_RAISED, BF_RECT | BF_MIDDLE, theme);
 305     SetTextColor(hdc, theme->crColor[COLOR_WINDOW]);
 306     MyDrawCaptionTemp(NULL, hdc, &pPreviewData->rcDialogCaption, pPreviewData->hCaptionFont,
 307                       NULL, pPreviewData->lpMessBox, DC_ACTIVE | DC_GRADIENT | DC_ICON | DC_TEXT, theme);
 308     MyDrawCaptionButtons(hdc, &pPreviewData->rcDialogCaption, FALSE, pPreviewData->cyCaption - 2, theme);
 309
 310     /* Draw the dialog text */
 311     CopyRect(&rc, &pPreviewData->rcDialogClient);
 312     rc.left += 4;
 313     rc.top += 2;
 314     SetTextColor(hdc, theme->crColor[COLOR_BTNTEXT]);
 315     hOldFont = SelectObject(hdc, pPreviewData->hMessageFont);
 316     DrawText(hdc, pPreviewData->lpMessText, -1, &rc, DT_LEFT);
 317     SelectObject(hdc, hOldFont);
 318
 319     /* Draw Button */
 320     MyDrawFrameControl(hdc, &pPreviewData->rcDialogButton, DFC_BUTTON, DFCS_BUTTONPUSH, theme);
 321     CopyRect(&rc, &pPreviewData->rcDialogButton);
 322     SetTextColor(hdc, theme->crColor[COLOR_BTNTEXT]);
 323     hOldFont = SelectObject(hdc, pPreviewData->hMessageFont);
 324     DrawText(hdc, pPreviewData->lpButText, -1, &rc, DT_VCENTER | DT_CENTER | DT_SINGLELINE);
 325     SelectObject(hdc, hOldFont);
 326
 327     EndPaint(hwnd, &ps);
 328 }
 329
 330
 331 static VOID
 332 OnLButtonDown(HWND hwnd, int xPos, int yPos, PPREVIEW_DATA pPreviewData)
 333 {
 334     UINT type = IDX_DESKTOP;
 335     POINT pt;
 336
 337     pt.x = xPos;
 338     pt.y = yPos;
 339
 340     if (PtInRect(&pPreviewData->rcInactiveFrame, pt))
 341         type = IDX_INACTIVE_BORDER;
 342
 343     if (PtInRect(&pPreviewData->rcInactiveCaption, pt))
 344         type = IDX_INACTIVE_CAPTION;
 345
 346     if (PtInRect(&pPreviewData->rcInactiveCaptionButtons, pt))
 347         type = IDX_CAPTION_BUTTON;
 348
 349     if (PtInRect(&pPreviewData->rcActiveFrame, pt))
 350         type = IDX_ACTIVE_BORDER;
 351
 352     if (PtInRect(&pPreviewData->rcActiveCaption, pt))
 353         type = IDX_ACTIVE_CAPTION;
 354
 355     if (PtInRect(&pPreviewData->rcActiveCaptionButtons, pt))
 356         type = IDX_CAPTION_BUTTON;
 357
 358 //    if (PtInRect(&pPreviewData->rcSelectedMenuItem, pt))
 359 //        type = IDX_SELECTION;
 360
 361     if (PtInRect(&pPreviewData->rcActiveMenuBar, pt))
 362         type = IDX_MENU;
 363
 364     if (PtInRect(&pPreviewData->rcActiveClient, pt))
 365         type = IDX_WINDOW;
 366
 367     if (PtInRect(&pPreviewData->rcActiveScroll, pt))
 368         type = IDX_SCROLLBAR;
 369
 370     if (PtInRect(&pPreviewData->rcDialogFrame, pt))
 371         type = IDX_DIALOG;
 372
 373     if (PtInRect(&pPreviewData->rcDialogCaption, pt))
 374         type = IDX_ACTIVE_CAPTION;
 375
 376     if (PtInRect(&pPreviewData->rcDialogCaptionButtons, pt))
 377         type = IDX_CAPTION_BUTTON;
 378
 379     if (PtInRect(&pPreviewData->rcDialogButton, pt))
 380         type = IDX_3D_OBJECTS;
 381
 382     SendMessage(GetParent(hwnd),
 383                 WM_COMMAND,
 384                 MAKEWPARAM(GetWindowLongPtrW(hwnd, GWLP_ID), 0),
 385                 (LPARAM)type);
 386 }
 387
 388
 389 static VOID
 390 OnDestroy(PPREVIEW_DATA pPreviewData)
 391 {
 392     DeleteObject(pPreviewData->hbrScrollbar);
 393     DeleteObject(pPreviewData->hbrDesktop);
 394     DeleteObject(pPreviewData->hbrWindow);
 395
 396     DeleteObject(pPreviewData->hCaptionFont);
 397     DeleteObject(pPreviewData->hMenuFont);
 398     DeleteObject(pPreviewData->hMessageFont);
 399
 400     DestroyMenu(pPreviewData->hMenu);
 401
 402     LocalFree((HLOCAL)pPreviewData->lpInAct);
 403     LocalFree((HLOCAL)pPreviewData->lpAct);
 404     LocalFree((HLOCAL)pPreviewData->lpWinTxt);
 405     LocalFree((HLOCAL)pPreviewData->lpMessBox);
 406     LocalFree((HLOCAL)pPreviewData->lpMessText);
 407     LocalFree((HLOCAL)pPreviewData->lpButText);
 408 }
 409
 410
 411 static LRESULT CALLBACK
 412 PreviewWndProc(HWND hwnd,
 413                UINT uMsg,
 414                WPARAM wParam,
 415                LPARAM lParam)
 416 {
 417     PPREVIEW_DATA pPreviewData;
 418
 419     pPreviewData = (PPREVIEW_DATA)GetWindowLongPtr(hwnd, GWLP_USERDATA);
 420
 421     switch (uMsg)
 422     {
 423         case WM_CREATE:
 424             pPreviewData = (PPREVIEW_DATA)HeapAlloc(GetProcessHeap(),
 425                                                     HEAP_ZERO_MEMORY,
 426                                                     sizeof(PREVIEW_DATA));
 427             if (!pPreviewData)
 428                 return -1;
 429
 430             SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)pPreviewData);
 431             OnCreate(hwnd, pPreviewData);
 432             break;
 433
 434         case WM_SIZE:
 435             OnSize(LOWORD(lParam), HIWORD(lParam), pPreviewData);
 436             break;
 437
 438         case WM_PAINT:
 439             OnPaint(hwnd, pPreviewData);
 440             break;
 441
 442         case WM_LBUTTONDOWN:
 443             OnLButtonDown(hwnd, LOWORD(lParam), HIWORD(lParam), pPreviewData);
 444             break;
 445
 446         case WM_DESTROY:
 447             OnDestroy(pPreviewData);
 448             HeapFree(GetProcessHeap(), 0, pPreviewData);
 449             break;
 450
 451         case PVM_GETCYCAPTION:
 452             return pPreviewData->cyCaption;
 453
 454         case PVM_SETCYCAPTION:
 455             if ((INT)lParam > 0)
 456             {
 457                 pPreviewData->cyCaption = (INT)lParam;
 458                 CalculateItemSize(pPreviewData);
 459                 InvalidateRect(hwnd, NULL, FALSE);
 460             }
 461             break;
 462
 463         case PVM_GETCYMENU:
 464             return pPreviewData->cyMenu;
 465
 466         case PVM_SETCYMENU:
 467             if ((INT)lParam > 0)
 468             {
 469                 pPreviewData->cyMenu = (INT)lParam;
 470                 CalculateItemSize(pPreviewData);
 471                 InvalidateRect(hwnd, NULL, FALSE);
 472             }
 473             break;
 474
 475         case PVM_GETCXSCROLLBAR:
 476             return pPreviewData->cxScrollbar;
 477
 478         case PVM_SETCXSCROLLBAR:
 479             if ((INT)lParam > 0)
 480             {
 481                 pPreviewData->cxScrollbar = (INT)lParam;
 482                 CalculateItemSize(pPreviewData);
 483                 InvalidateRect(hwnd, NULL, FALSE);
 484             }
 485             break;
 486
 487         case PVM_GETCYSIZEFRAME:
 488             return pPreviewData->cySizeFrame;
 489
 490         case PVM_SETCYSIZEFRAME:
 491             if ((INT)lParam > 0)
 492             {
 493                 pPreviewData->cySizeFrame = (INT)lParam;
 494                 CalculateItemSize(pPreviewData);
 495                 InvalidateRect(hwnd, NULL, FALSE);
 496             }
 497             break;
 498
 499         case PVM_UPDATETHEME:
 500             UpdatePreviewTheme(hwnd, pPreviewData, (THEME *)lParam);
 501             break;
 502
 503         default:
 504             return DefWindowProc(hwnd, uMsg, wParam, lParam);
 505     }
 506     return FALSE;
 507 }
 508
 509
 510 BOOL
 511 RegisterPreviewControl(IN HINSTANCE hInstance)
 512 {
 513     WNDCLASSEX wc = {0};
 514
 515     wc.cbSize = sizeof(WNDCLASSEX);
 516     wc.lpfnWndProc = PreviewWndProc;
 517     wc.hInstance = hInstance;
 518     wc.hCursor = LoadCursor(NULL, IDC_ARROW);
 519     wc.hbrBackground = (HBRUSH)NULL;
 520     wc.lpszClassName = szPreviewWndClass;
 521
 522     return RegisterClassEx(&wc) != (ATOM)0;
 523 }
 524
 525
 526 VOID
 527 UnregisterPreviewControl(IN HINSTANCE hInstance)
 528 {
 529     UnregisterClass(szPreviewWndClass, hInstance);
 530 }