dll/cpl/desk/preview.c

   1 /*
   2  * PROJECT:     ReactOS Desktop Control Panel
   3  * LICENSE:     GPL - See COPYING in the top level directory
   4  * FILE:        dll/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     HDC hdcPreview;
  16
  17     HWND hwndParent;
  18
  19     COLOR_SCHEME Scheme;
  20
  21     HBRUSH hbrScrollbar;
  22     HBRUSH hbrDesktop;
  23     HBRUSH hbrWindow;
  24
  25     INT cxEdge;
  26     INT cyEdge;
  27
  28     INT cySizeFrame;
  29
  30     INT cyCaption;
  31     INT cyBorder;
  32     INT cyMenu;
  33     INT cxScrollbar;
  34
  35     RECT rcDesktop;
  36     RECT rcInactiveFrame;
  37     RECT rcInactiveCaption;
  38     RECT rcInactiveCaptionButtons;
  39
  40     RECT rcActiveFrame;
  41     RECT rcActiveCaption;
  42     RECT rcActiveCaptionButtons;
  43     RECT rcActiveMenuBar;
  44     RECT rcSelectedMenuItem;
  45     RECT rcActiveClient;
  46     RECT rcActiveScroll;
  47
  48     RECT rcDialogFrame;
  49     RECT rcDialogCaption;
  50     RECT rcDialogCaptionButtons;
  51     RECT rcDialogClient;
  52
  53     RECT rcDialogButton;
  54
  55     LPTSTR lpInAct;
  56     LPTSTR lpAct;
  57     LPTSTR lpWinTxt;
  58     LPTSTR lpMessBox;
  59     LPTSTR lpMessText;
  60     LPTSTR lpButText;
  61
  62     HFONT hCaptionFont;
  63     HFONT hMenuFont;
  64     HFONT hMessageFont;
  65     HFONT hClientFont;
  66
  67     HMENU hMenu;
  68
  69 } PREVIEW_DATA, *PPREVIEW_DATA;
  70
  71
  72 static VOID UpdatePreviewTheme(HWND hwnd, PPREVIEW_DATA pPreviewData, COLOR_SCHEME *scheme)
  73 {
  74     if (pPreviewData->hbrScrollbar != NULL)
  75         DeleteObject(pPreviewData->hbrScrollbar);
  76     pPreviewData->hbrScrollbar = CreateSolidBrush(scheme->crColor[COLOR_SCROLLBAR]);
  77     if (pPreviewData->hbrDesktop != NULL)
  78         DeleteObject(pPreviewData->hbrDesktop);
  79
  80     pPreviewData->hbrDesktop = CreateSolidBrush(scheme->crColor[COLOR_DESKTOP]);
  81     if (pPreviewData->hbrWindow != NULL)
  82         DeleteObject(pPreviewData->hbrWindow);
  83     pPreviewData->hbrWindow = CreateSolidBrush(scheme->crColor[COLOR_WINDOW]);
  84
  85     pPreviewData->cxEdge = 2;                                       /* SM_CXEDGE */
  86     pPreviewData->cyEdge = 2;                                       /* SM_CYEDGE */
  87
  88     pPreviewData->cySizeFrame = scheme->ncMetrics.iBorderWidth;     /* SM_CYSIZEFRAME */
  89
  90     pPreviewData->cyCaption = scheme->ncMetrics.iCaptionHeight+1;   /* SM_CYCAPTION */
  91     pPreviewData->cyMenu = scheme->ncMetrics.iMenuHeight -1;        /* SM_CYMENU */
  92     pPreviewData->cxScrollbar = scheme->ncMetrics.iScrollWidth;     /* SM_CXVSCROLL */
  93     pPreviewData->cyBorder = scheme->ncMetrics.iBorderWidth;        /* SM_CYBORDER */
  94
  95     if (pPreviewData->hCaptionFont != NULL)
  96         DeleteObject(pPreviewData->hCaptionFont);
  97     pPreviewData->hCaptionFont = CreateFontIndirect(&scheme->ncMetrics.lfCaptionFont);
  98
  99     if (pPreviewData->hMenuFont != NULL)
 100         DeleteObject(pPreviewData->hMenuFont);
 101     pPreviewData->hMenuFont = CreateFontIndirect(&scheme->ncMetrics.lfMenuFont);
 102
 103     if (pPreviewData->hMessageFont != NULL)
 104         DeleteObject(pPreviewData->hMessageFont);
 105     pPreviewData->hMessageFont = CreateFontIndirect(&scheme->ncMetrics.lfMessageFont);
 106
 107     pPreviewData->Scheme = *scheme;
 108     InvalidateRect(hwnd, NULL, FALSE);
 109 }
 110
 111 static VOID
 112 OnCreate(HWND hwnd, PPREVIEW_DATA pPreviewData)
 113 {
 114     COLOR_SCHEME *scheme;
 115
 116     pPreviewData->hClientFont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
 117
 118     /* Load and modify the menu */
 119     pPreviewData->hMenu = LoadMenu(hApplet, MAKEINTRESOURCE(IDR_PREVIEW_MENU));
 120     EnableMenuItem(pPreviewData->hMenu,
 121                    1, MF_BYPOSITION | MF_GRAYED);
 122     HiliteMenuItem(hwnd, pPreviewData->hMenu,
 123                    2, MF_BYPOSITION | MF_HILITE);
 124
 125 //    GetMenuItemRect(hwnd, pPreviewData->hMenu,
 126 //                    2, &pPreviewData->rcSelectedMenuItem);
 127
 128     AllocAndLoadString(&pPreviewData->lpInAct, hApplet, IDS_INACTWIN);
 129     AllocAndLoadString(&pPreviewData->lpAct, hApplet, IDS_ACTWIN);
 130     AllocAndLoadString(&pPreviewData->lpWinTxt, hApplet, IDS_WINTEXT);
 131     AllocAndLoadString(&pPreviewData->lpMessBox, hApplet, IDS_MESSBOX);
 132     AllocAndLoadString(&pPreviewData->lpMessText, hApplet, IDS_MESSTEXT);
 133     AllocAndLoadString(&pPreviewData->lpButText, hApplet, IDS_BUTTEXT);
 134
 135     scheme = &pPreviewData->Scheme;
 136     LoadCurrentScheme(scheme);
 137
 138     UpdatePreviewTheme(hwnd, pPreviewData, scheme);
 139 }
 140
 141
 142 static VOID
 143 CalculateItemSize(PPREVIEW_DATA pPreviewData)
 144 {
 145     int width, height;
 146
 147     /* Calculate the inactive window rectangle */
 148     pPreviewData->rcInactiveFrame.left = pPreviewData->rcDesktop.left + 8;
 149     pPreviewData->rcInactiveFrame.top = pPreviewData->rcDesktop.top + 8;
 150     pPreviewData->rcInactiveFrame.right = pPreviewData->rcDesktop.right - 25;
 151     pPreviewData->rcInactiveFrame.bottom = pPreviewData->rcDesktop.bottom - 30;
 152
 153     /* Calculate the inactive caption rectangle */
 154     pPreviewData->rcInactiveCaption.left = pPreviewData->rcInactiveFrame.left + pPreviewData->cxEdge + pPreviewData->cySizeFrame + 1;
 155     pPreviewData->rcInactiveCaption.top = pPreviewData->rcInactiveFrame.top + pPreviewData->cyEdge + pPreviewData->cySizeFrame + 1;
 156     pPreviewData->rcInactiveCaption.right = pPreviewData->rcInactiveFrame.right - pPreviewData->cxEdge - pPreviewData->cySizeFrame - 1;
 157     pPreviewData->rcInactiveCaption.bottom = pPreviewData->rcInactiveCaption.top + pPreviewData->cyCaption - pPreviewData->cyBorder;
 158
 159     /* Calculate the inactive caption buttons rectangle */
 160     pPreviewData->rcInactiveCaptionButtons.left = pPreviewData->rcInactiveCaption.right - 2 - 2 - 3 * 16;
 161     pPreviewData->rcInactiveCaptionButtons.top = pPreviewData->rcInactiveCaption.top + 2;
 162     pPreviewData->rcInactiveCaptionButtons.right = pPreviewData->rcInactiveCaption.right - 2;
 163     pPreviewData->rcInactiveCaptionButtons.bottom = pPreviewData->rcInactiveCaption.bottom - 2;
 164
 165     /* Calculate the active window rectangle */
 166     pPreviewData->rcActiveFrame.left = pPreviewData->rcInactiveFrame.left + 3 + pPreviewData->cySizeFrame;
 167     pPreviewData->rcActiveFrame.top = pPreviewData->rcInactiveCaption.bottom + 1;
 168     pPreviewData->rcActiveFrame.right = pPreviewData->rcDesktop.right - 10;
 169     pPreviewData->rcActiveFrame.bottom = pPreviewData->rcDesktop.bottom - 25;
 170
 171     /* Calculate the active caption rectangle */
 172     pPreviewData->rcActiveCaption.left = pPreviewData->rcActiveFrame.left + pPreviewData->cxEdge + pPreviewData->cySizeFrame + 1;
 173     pPreviewData->rcActiveCaption.top = pPreviewData->rcActiveFrame.top + pPreviewData->cxEdge + pPreviewData->cySizeFrame + 1;
 174     pPreviewData->rcActiveCaption.right = pPreviewData->rcActiveFrame.right - pPreviewData->cxEdge - pPreviewData->cySizeFrame - 1;
 175     pPreviewData->rcActiveCaption.bottom = pPreviewData->rcActiveCaption.top + pPreviewData->cyCaption - pPreviewData->cyBorder;
 176
 177     /* Calculate the active caption buttons rectangle */
 178     pPreviewData->rcActiveCaptionButtons.left = pPreviewData->rcActiveCaption.right - 2 - 2 - 3 * 16;
 179     pPreviewData->rcActiveCaptionButtons.top = pPreviewData->rcActiveCaption.top + 2;
 180     pPreviewData->rcActiveCaptionButtons.right = pPreviewData->rcActiveCaption.right - 2;
 181     pPreviewData->rcActiveCaptionButtons.bottom = pPreviewData->rcActiveCaption.bottom - 2;
 182
 183     /* Calculate the active menu bar rectangle */
 184     pPreviewData->rcActiveMenuBar.left = pPreviewData->rcActiveFrame.left + pPreviewData->cxEdge + pPreviewData->cySizeFrame + 1;
 185     pPreviewData->rcActiveMenuBar.top = pPreviewData->rcActiveCaption.bottom + 1;
 186     pPreviewData->rcActiveMenuBar.right = pPreviewData->rcActiveFrame.right - pPreviewData->cxEdge - pPreviewData->cySizeFrame - 1;
 187     pPreviewData->rcActiveMenuBar.bottom = pPreviewData->rcActiveMenuBar.top + pPreviewData->cyMenu + 1;
 188
 189     /* Calculate the active client rectangle */
 190     pPreviewData->rcActiveClient.left = pPreviewData->rcActiveFrame.left + pPreviewData->cxEdge + pPreviewData->cySizeFrame + 1;
 191     pPreviewData->rcActiveClient.top = pPreviewData->rcActiveMenuBar.bottom;
 192     pPreviewData->rcActiveClient.right = pPreviewData->rcActiveFrame.right - pPreviewData->cxEdge - pPreviewData->cySizeFrame - 1;
 193     pPreviewData->rcActiveClient.bottom = pPreviewData->rcActiveFrame.bottom - pPreviewData->cyEdge - pPreviewData->cySizeFrame - 1;
 194
 195     /* Calculate the active scroll rectangle */
 196     pPreviewData->rcActiveScroll.left = pPreviewData->rcActiveClient.right - 2 - pPreviewData->cxScrollbar;
 197     pPreviewData->rcActiveScroll.top = pPreviewData->rcActiveClient.top + 2;
 198     pPreviewData->rcActiveScroll.right = pPreviewData->rcActiveClient.right - 2;
 199     pPreviewData->rcActiveScroll.bottom = pPreviewData->rcActiveClient.bottom - 2;
 200
 201
 202     /* Dialog window */
 203     pPreviewData->rcDialogFrame.left = pPreviewData->rcActiveClient.left + 4;
 204     pPreviewData->rcDialogFrame.top = (pPreviewData->rcDesktop.bottom * 60) / 100;
 205     pPreviewData->rcDialogFrame.right = (pPreviewData->rcDesktop.right * 65) / 100;
 206     pPreviewData->rcDialogFrame.bottom = pPreviewData->rcDesktop.bottom - 5;
 207
 208     /* Calculate the dialog caption rectangle */
 209     pPreviewData->rcDialogCaption.left = pPreviewData->rcDialogFrame.left + 3;
 210     pPreviewData->rcDialogCaption.top = pPreviewData->rcDialogFrame.top + 3;
 211     pPreviewData->rcDialogCaption.right = pPreviewData->rcDialogFrame.right - 3;
 212     pPreviewData->rcDialogCaption.bottom = pPreviewData->rcDialogFrame.top + pPreviewData->cyCaption + 1 + 1;
 213
 214     /* Calculate the inactive caption buttons rectangle */
 215     pPreviewData->rcDialogCaptionButtons.left = pPreviewData->rcDialogCaption.right - 2 - 16;
 216     pPreviewData->rcDialogCaptionButtons.top = pPreviewData->rcDialogCaption.top + 2;
 217     pPreviewData->rcDialogCaptionButtons.right = pPreviewData->rcDialogCaption.right - 2;
 218     pPreviewData->rcDialogCaptionButtons.bottom = pPreviewData->rcDialogCaption.bottom - 2;
 219
 220     /* Calculate the dialog client rectangle */
 221     pPreviewData->rcDialogClient.left = pPreviewData->rcDialogFrame.left + 3;
 222     pPreviewData->rcDialogClient.top = pPreviewData->rcDialogCaption.bottom + 1;
 223     pPreviewData->rcDialogClient.right = pPreviewData->rcDialogFrame.right - 3;
 224     pPreviewData->rcDialogClient.bottom = pPreviewData->rcDialogFrame.bottom - 3;
 225
 226     /* Calculate the dialog button rectangle */
 227     width = 80;
 228     height = 28;
 229
 230     pPreviewData->rcDialogButton.left =
 231         (pPreviewData->rcDialogClient.right + pPreviewData->rcDialogClient.left - width) / 2;
 232     pPreviewData->rcDialogButton.right = pPreviewData->rcDialogButton.left + width;
 233     pPreviewData->rcDialogButton.bottom = pPreviewData->rcDialogClient.bottom - 2;
 234     pPreviewData->rcDialogButton.top = pPreviewData->rcDialogButton.bottom - height;
 235 }
 236
 237
 238 static VOID
 239 OnSize(INT cx, INT cy, PPREVIEW_DATA pPreviewData)
 240 {
 241     /* Get Desktop rectangle */
 242     pPreviewData->rcDesktop.left = 0;
 243     pPreviewData->rcDesktop.top = 0;
 244     pPreviewData->rcDesktop.right = cx;
 245     pPreviewData->rcDesktop.bottom = cy;
 246
 247     CalculateItemSize(pPreviewData);
 248 }
 249
 250 static VOID
 251 OnPaint(HWND hwnd, PPREVIEW_DATA pPreviewData)
 252 {
 253     PAINTSTRUCT ps;
 254     HFONT hOldFont;
 255     HDC hdc;
 256     RECT rc;
 257     COLOR_SCHEME *scheme;
 258
 259     scheme = &pPreviewData->Scheme;
 260
 261     hdc = BeginPaint(hwnd, &ps);
 262
 263     if(pPreviewData->hdcPreview)
 264     {
 265         BitBlt(hdc,0,0, pPreviewData->rcDesktop.right, pPreviewData->rcDesktop.bottom, pPreviewData->hdcPreview, 0,0, SRCCOPY);
 266         EndPaint(hwnd, &ps);
 267         return;
 268     }
 269
 270     /* Desktop */
 271     FillRect(hdc, &pPreviewData->rcDesktop, pPreviewData->hbrDesktop);
 272
 273     /* Inactive Window */
 274     MyDrawEdge(hdc, &pPreviewData->rcInactiveFrame, EDGE_RAISED, BF_RECT | BF_MIDDLE | MY_BF_INACTIVEBORDER, scheme);
 275     SetTextColor(hdc, scheme->crColor[COLOR_INACTIVECAPTIONTEXT]);
 276     MyDrawCaptionTemp(NULL, hdc, &pPreviewData->rcInactiveCaption,  pPreviewData->hCaptionFont,
 277                       NULL, pPreviewData->lpInAct, DC_GRADIENT | DC_ICON | DC_TEXT, scheme);
 278     MyDrawCaptionButtons(hdc, &pPreviewData->rcInactiveCaption, TRUE, pPreviewData->cyCaption - 2, scheme);
 279
 280     /* Active Window */
 281     MyDrawEdge(hdc, &pPreviewData->rcActiveFrame, EDGE_RAISED, BF_RECT | BF_MIDDLE | MY_BF_ACTIVEBORDER, scheme);
 282     SetTextColor(hdc, scheme->crColor[COLOR_CAPTIONTEXT]);
 283     MyDrawCaptionTemp(NULL, hdc, &pPreviewData->rcActiveCaption, pPreviewData->hCaptionFont,
 284                       NULL, pPreviewData->lpAct, DC_ACTIVE | DC_GRADIENT | DC_ICON | DC_TEXT, scheme);
 285     MyDrawCaptionButtons(hdc, &pPreviewData->rcActiveCaption, TRUE, pPreviewData->cyCaption - 2, scheme);
 286
 287     /* Draw the menu bar */
 288     MyDrawMenuBarTemp(hwnd, hdc, &pPreviewData->rcActiveMenuBar,
 289                       pPreviewData->hMenu,
 290                       pPreviewData->hMenuFont, scheme);
 291
 292     /* Draw the client area */
 293     CopyRect(&rc, &pPreviewData->rcActiveClient);
 294     MyDrawEdge(hdc, &rc, EDGE_SUNKEN, BF_RECT | BF_ADJUST, scheme);
 295     FillRect(hdc, &rc, pPreviewData->hbrWindow);
 296
 297     /* Draw the client text */
 298     CopyRect(&rc, &pPreviewData->rcActiveClient);
 299     rc.left += 4;
 300     rc.top += 2;
 301     SetTextColor(hdc, scheme->crColor[COLOR_WINDOWTEXT]);
 302     hOldFont = SelectObject(hdc, pPreviewData->hClientFont);
 303     DrawText(hdc, pPreviewData->lpWinTxt, -1, &rc, DT_LEFT);
 304     SelectObject(hdc, hOldFont);
 305
 306     /* Draw the scroll bar */
 307     MyDrawScrollbar(hdc, &pPreviewData->rcActiveScroll, pPreviewData->hbrScrollbar, scheme);
 308
 309     /* Dialog Window */
 310     MyDrawEdge(hdc, &pPreviewData->rcDialogFrame, EDGE_RAISED, BF_RECT | BF_MIDDLE, scheme);
 311     SetTextColor(hdc, scheme->crColor[COLOR_WINDOW]);
 312     MyDrawCaptionTemp(NULL, hdc, &pPreviewData->rcDialogCaption, pPreviewData->hCaptionFont,
 313                       NULL, pPreviewData->lpMessBox, DC_ACTIVE | DC_GRADIENT | DC_ICON | DC_TEXT, scheme);
 314     MyDrawCaptionButtons(hdc, &pPreviewData->rcDialogCaption, FALSE, pPreviewData->cyCaption - 2, scheme);
 315
 316     /* Draw the dialog text */
 317     CopyRect(&rc, &pPreviewData->rcDialogClient);
 318     rc.left += 4;
 319     rc.top += 2;
 320     SetTextColor(hdc, scheme->crColor[COLOR_WINDOWTEXT]);
 321     hOldFont = SelectObject(hdc, pPreviewData->hMessageFont);
 322     DrawText(hdc, pPreviewData->lpMessText, -1, &rc, DT_LEFT);
 323     SelectObject(hdc, hOldFont);
 324
 325     /* Draw Button */
 326     MyDrawFrameControl(hdc, &pPreviewData->rcDialogButton, DFC_BUTTON, DFCS_BUTTONPUSH, scheme);
 327     CopyRect(&rc, &pPreviewData->rcDialogButton);
 328     SetTextColor(hdc, scheme->crColor[COLOR_BTNTEXT]);
 329     hOldFont = SelectObject(hdc, pPreviewData->hMessageFont);
 330     DrawText(hdc, pPreviewData->lpButText, -1, &rc, DT_VCENTER | DT_CENTER | DT_SINGLELINE);
 331     SelectObject(hdc, hOldFont);
 332
 333     EndPaint(hwnd, &ps);
 334 }
 335
 336
 337 static VOID
 338 OnLButtonDown(HWND hwnd, int xPos, int yPos, PPREVIEW_DATA pPreviewData)
 339 {
 340     UINT type = IDX_DESKTOP;
 341     POINT pt;
 342
 343     pt.x = xPos;
 344     pt.y = yPos;
 345
 346     if (PtInRect(&pPreviewData->rcInactiveFrame, pt))
 347         type = IDX_INACTIVE_BORDER;
 348
 349     if (PtInRect(&pPreviewData->rcInactiveCaption, pt))
 350         type = IDX_INACTIVE_CAPTION;
 351
 352     if (PtInRect(&pPreviewData->rcInactiveCaptionButtons, pt))
 353         type = IDX_CAPTION_BUTTON;
 354
 355     if (PtInRect(&pPreviewData->rcActiveFrame, pt))
 356         type = IDX_ACTIVE_BORDER;
 357
 358     if (PtInRect(&pPreviewData->rcActiveCaption, pt))
 359         type = IDX_ACTIVE_CAPTION;
 360
 361     if (PtInRect(&pPreviewData->rcActiveCaptionButtons, pt))
 362         type = IDX_CAPTION_BUTTON;
 363
 364 //    if (PtInRect(&pPreviewData->rcSelectedMenuItem, pt))
 365 //        type = IDX_SELECTION;
 366
 367     if (PtInRect(&pPreviewData->rcActiveMenuBar, pt))
 368         type = IDX_MENU;
 369
 370     if (PtInRect(&pPreviewData->rcActiveClient, pt))
 371         type = IDX_WINDOW;
 372
 373     if (PtInRect(&pPreviewData->rcActiveScroll, pt))
 374         type = IDX_SCROLLBAR;
 375
 376     if (PtInRect(&pPreviewData->rcDialogFrame, pt))
 377         type = IDX_DIALOG;
 378
 379     if (PtInRect(&pPreviewData->rcDialogCaption, pt))
 380         type = IDX_ACTIVE_CAPTION;
 381
 382     if (PtInRect(&pPreviewData->rcDialogCaptionButtons, pt))
 383         type = IDX_CAPTION_BUTTON;
 384
 385     if (PtInRect(&pPreviewData->rcDialogButton, pt))
 386         type = IDX_3D_OBJECTS;
 387
 388     SendMessage(GetParent(hwnd),
 389                 WM_COMMAND,
 390                 MAKEWPARAM(GetWindowLongPtrW(hwnd, GWLP_ID), 0),
 391                 (LPARAM)type);
 392 }
 393
 394
 395 static VOID
 396 OnDestroy(PPREVIEW_DATA pPreviewData)
 397 {
 398     DeleteObject(pPreviewData->hbrScrollbar);
 399     DeleteObject(pPreviewData->hbrDesktop);
 400     DeleteObject(pPreviewData->hbrWindow);
 401
 402     DeleteObject(pPreviewData->hCaptionFont);
 403     DeleteObject(pPreviewData->hMenuFont);
 404     DeleteObject(pPreviewData->hMessageFont);
 405
 406     DestroyMenu(pPreviewData->hMenu);
 407
 408     LocalFree((HLOCAL)pPreviewData->lpInAct);
 409     LocalFree((HLOCAL)pPreviewData->lpAct);
 410     LocalFree((HLOCAL)pPreviewData->lpWinTxt);
 411     LocalFree((HLOCAL)pPreviewData->lpMessBox);
 412     LocalFree((HLOCAL)pPreviewData->lpMessText);
 413     LocalFree((HLOCAL)pPreviewData->lpButText);
 414 }
 415
 416
 417 static LRESULT CALLBACK
 418 PreviewWndProc(HWND hwnd,
 419                UINT uMsg,
 420                WPARAM wParam,
 421                LPARAM lParam)
 422 {
 423     PPREVIEW_DATA pPreviewData;
 424
 425     pPreviewData = (PPREVIEW_DATA)GetWindowLongPtr(hwnd, GWLP_USERDATA);
 426
 427     switch (uMsg)
 428     {
 429         case WM_CREATE:
 430             pPreviewData = (PPREVIEW_DATA)HeapAlloc(GetProcessHeap(),
 431                                                     HEAP_ZERO_MEMORY,
 432                                                     sizeof(PREVIEW_DATA));
 433             if (!pPreviewData)
 434                 return -1;
 435
 436             SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)pPreviewData);
 437             OnCreate(hwnd, pPreviewData);
 438             break;
 439
 440         case WM_SIZE:
 441             OnSize(LOWORD(lParam), HIWORD(lParam), pPreviewData);
 442             break;
 443
 444         case WM_PAINT:
 445             OnPaint(hwnd, pPreviewData);
 446             break;
 447
 448         case WM_LBUTTONDOWN:
 449             OnLButtonDown(hwnd, LOWORD(lParam), HIWORD(lParam), pPreviewData);
 450             break;
 451
 452         case WM_DESTROY:
 453             OnDestroy(pPreviewData);
 454             HeapFree(GetProcessHeap(), 0, pPreviewData);
 455             break;
 456
 457         case PVM_UPDATETHEME:
 458             UpdatePreviewTheme(hwnd, pPreviewData, (COLOR_SCHEME *)lParam);
 459             CalculateItemSize(pPreviewData);
 460             InvalidateRect(hwnd, NULL, FALSE);
 461             break;
 462
 463         case PVM_SETSIZE:
 464             SchemeSetMetric(&pPreviewData->Scheme, wParam, lParam);
 465             pPreviewData->cySizeFrame = pPreviewData->Scheme.ncMetrics.iBorderWidth;  /* SM_CYSIZEFRAME */
 466             pPreviewData->cyCaption = pPreviewData->Scheme.ncMetrics.iCaptionHeight+1;      /* SM_CYCAPTION */
 467             pPreviewData->cyMenu = pPreviewData->Scheme.ncMetrics.iMenuHeight -1;            /* SM_CYMENU */
 468             pPreviewData->cxScrollbar = pPreviewData->Scheme.ncMetrics.iScrollWidth;     /* SM_CXVSCROLL */
 469             pPreviewData->cyBorder = pPreviewData->Scheme.ncMetrics.iBorderWidth;        /* SM_CYBORDER */
 470             CalculateItemSize(pPreviewData);
 471             InvalidateRect(hwnd, NULL, FALSE);
 472             break;
 473
 474         case PVM_SETFONT:
 475         {
 476             PLOGFONTW plfFont;
 477             HFONT* phFont;
 478
 479             switch(wParam)
 480             {
 481             case FONT_CAPTION:   phFont = &pPreviewData->hCaptionFont; break;
 482             case FONT_MENU:      phFont = &pPreviewData->hMenuFont; break;
 483             case FONT_MESSAGE:   phFont = &pPreviewData->hMessageFont; break;
 484             default:  return TRUE;
 485             }
 486
 487             plfFont = SchemeGetFont(&pPreviewData->Scheme, wParam);
 488             memcpy(plfFont, (PVOID)lParam, sizeof(LOGFONTW));
 489
 490             DeleteObject(*phFont);
 491             *phFont = CreateFontIndirect(plfFont);
 492
 493             InvalidateRect(hwnd, NULL, FALSE);
 494             break;
 495         }
 496
 497         case PVM_SETCOLOR:
 498             pPreviewData->Scheme.crColor[wParam] = lParam;
 499             switch(wParam)
 500             {
 501                 case COLOR_SCROLLBAR:
 502                     DeleteObject(pPreviewData->hbrScrollbar);
 503                     pPreviewData->hbrScrollbar = CreateSolidBrush(pPreviewData->Scheme.crColor[wParam]);
 504                     break;
 505                 case COLOR_DESKTOP:
 506                     DeleteObject(pPreviewData->hbrDesktop);
 507                     pPreviewData->hbrDesktop = CreateSolidBrush(pPreviewData->Scheme.crColor[wParam]);
 508                     break;
 509                 case COLOR_WINDOW:
 510                     DeleteObject(pPreviewData->hbrWindow);
 511                     pPreviewData->hbrWindow = CreateSolidBrush(pPreviewData->Scheme.crColor[wParam]);
 512                     break;
 513             }
 514
 515             CalculateItemSize(pPreviewData);
 516             InvalidateRect(hwnd, NULL, FALSE);
 517             break;
 518
 519         case PVM_GETSIZE:
 520             return SchemeGetMetric(&pPreviewData->Scheme, wParam);
 521         case PVM_GETFONT:
 522             return (LRESULT)SchemeGetFont(&pPreviewData->Scheme, wParam);
 523         case PVM_GETCOLOR:
 524             return pPreviewData->Scheme.crColor[wParam];
 525
 526         case PVM_SET_HDC_PREVIEW:
 527             pPreviewData->hdcPreview = (HDC)lParam;
 528             InvalidateRect(hwnd, NULL, FALSE);
 529             break;
 530
 531         default:
 532             return DefWindowProc(hwnd, uMsg, wParam, lParam);
 533     }
 534     return FALSE;
 535 }
 536
 537
 538 BOOL
 539 RegisterPreviewControl(IN HINSTANCE hInstance)
 540 {
 541     WNDCLASSEX wc = {0};
 542
 543     wc.cbSize = sizeof(WNDCLASSEX);
 544     wc.lpfnWndProc = PreviewWndProc;
 545     wc.hInstance = hInstance;
 546     wc.hCursor = LoadCursor(NULL, IDC_ARROW);
 547     wc.hbrBackground = (HBRUSH)NULL;
 548     wc.lpszClassName = szPreviewWndClass;
 549
 550     return RegisterClassEx(&wc) != (ATOM)0;
 551 }
 552
 553
 554 VOID
 555 UnregisterPreviewControl(IN HINSTANCE hInstance)
 556 {
 557     UnregisterClass(szPreviewWndClass, hInstance);
 558 }