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