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