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     pPreviewData->hbrDesktop = CreateSolidBrush(theme->crColor[COLOR_DESKTOP]);
  81     if (pPreviewData->hbrWindow != NULL)
  82         DeleteObject(pPreviewData->hbrWindow);
  83     pPreviewData->hbrWindow = CreateSolidBrush(theme->crColor[COLOR_WINDOW]);
  84
  85     pPreviewData->cxEdge = theme->Size[SIZE_EDGE_X] - 2;        /* SM_CXEDGE */
  86     pPreviewData->cyEdge = theme->Size[SIZE_EDGE_Y] - 2;        /* SM_CYEDGE */
  87
  88     pPreviewData->cySizeFrame = theme->Size[SIZE_FRAME_Y] - 1;  /* SM_CYSIZEFRAME */
  89
  90     pPreviewData->cyCaption = theme->Size[SIZE_CAPTION_Y];      /* SM_CYCAPTION */
  91     pPreviewData->cyMenu = theme->Size[SIZE_MENU_Y];            /* SM_CYMENU */
  92     pPreviewData->cxScrollbar = theme->Size[SIZE_SCROLL_X];     /* SM_CXVSCROLL */
  93     pPreviewData->cyBorder = theme->Size[SIZE_BORDER_Y];        /* SM_CYBORDER */
  94
  95     if (pPreviewData->hCaptionFont != NULL)
  96         DeleteObject(pPreviewData->hCaptionFont);
  97     pPreviewData->hCaptionFont = CreateFontIndirect(&theme->lfFont[FONT_CAPTION]);
  98
  99     if (pPreviewData->hMenuFont != NULL)
 100         DeleteObject(pPreviewData->hMenuFont);
 101     pPreviewData->hMenuFont = CreateFontIndirect(&theme->lfFont[FONT_MENU]);
 102
 103     if (pPreviewData->hMessageFont != NULL)
 104         DeleteObject(pPreviewData->hMessageFont);
 105     pPreviewData->hMessageFont = CreateFontIndirect(&theme->lfFont[FONT_DIALOG]);
 106
 107     pPreviewData->Theme = *theme;
 108     InvalidateRect(hwnd, NULL, FALSE);
 109 }
 110
 111 static VOID
 112 OnCreate(HWND hwnd, PPREVIEW_DATA pPreviewData)
 113 {
 114     THEME *theme;
 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     theme = &pPreviewData->Theme;
 136     LoadCurrentTheme(theme);
 137
 138     UpdatePreviewTheme(hwnd, pPreviewData, theme);
 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     THEME *theme;
 258
 259     theme = &pPreviewData->Theme;
 260
 261     hdc = BeginPaint(hwnd, &ps);
 262
 263     /* Desktop */
 264     FillRect(hdc, &pPreviewData->rcDesktop, pPreviewData->hbrDesktop);
 265
 266     /* Inactive Window */
 267     MyDrawEdge(hdc, &pPreviewData->rcInactiveFrame, EDGE_RAISED, BF_RECT | BF_MIDDLE, theme);
 268     SetTextColor(hdc, theme->crColor[COLOR_INACTIVECAPTIONTEXT]);
 269     MyDrawCaptionTemp(NULL, hdc, &pPreviewData->rcInactiveCaption,  pPreviewData->hCaptionFont,
 270                       NULL, pPreviewData->lpInAct, DC_GRADIENT | DC_ICON | DC_TEXT, theme);
 271     MyDrawCaptionButtons(hdc, &pPreviewData->rcInactiveCaption, TRUE, pPreviewData->cyCaption - 2, theme);
 272
 273     /* Active Window */
 274     MyDrawEdge(hdc, &pPreviewData->rcActiveFrame, EDGE_RAISED, BF_RECT | BF_MIDDLE, theme);
 275     SetTextColor(hdc, theme->crColor[COLOR_CAPTIONTEXT]);
 276     MyDrawCaptionTemp(NULL, hdc, &pPreviewData->rcActiveCaption, pPreviewData->hCaptionFont,
 277                       NULL, pPreviewData->lpAct, DC_ACTIVE | DC_GRADIENT | DC_ICON | DC_TEXT, theme);
 278     MyDrawCaptionButtons(hdc, &pPreviewData->rcActiveCaption, TRUE, pPreviewData->cyCaption - 2, theme);
 279
 280     /* Draw the menu bar */
 281     MyDrawMenuBarTemp(hwnd, hdc, &pPreviewData->rcActiveMenuBar,
 282                       pPreviewData->hMenu,
 283                       pPreviewData->hMenuFont, theme);
 284
 285     /* Draw the client area */
 286     CopyRect(&rc, &pPreviewData->rcActiveClient);
 287     MyDrawEdge(hdc, &rc, EDGE_SUNKEN, BF_RECT | BF_ADJUST, theme);
 288     FillRect(hdc, &rc, pPreviewData->hbrWindow);
 289
 290     /* Draw the client text */
 291     CopyRect(&rc, &pPreviewData->rcActiveClient);
 292     rc.left += 4;
 293     rc.top += 2;
 294     SetTextColor(hdc, theme->crColor[COLOR_WINDOWTEXT]);
 295     hOldFont = SelectObject(hdc, pPreviewData->hClientFont);
 296     DrawText(hdc, pPreviewData->lpWinTxt, -1, &rc, DT_LEFT);
 297     SelectObject(hdc, hOldFont);
 298
 299     /* Draw the scroll bar */
 300     MyDrawScrollbar(hdc, &pPreviewData->rcActiveScroll, pPreviewData->hbrScrollbar, theme);
 301
 302     /* Dialog Window */
 303     MyDrawEdge(hdc, &pPreviewData->rcDialogFrame, EDGE_RAISED, BF_RECT | BF_MIDDLE, theme);
 304     SetTextColor(hdc, theme->crColor[COLOR_WINDOW]);
 305     MyDrawCaptionTemp(NULL, hdc, &pPreviewData->rcDialogCaption, pPreviewData->hCaptionFont,
 306                       NULL, pPreviewData->lpMessBox, DC_ACTIVE | DC_GRADIENT | DC_ICON | DC_TEXT, theme);
 307     MyDrawCaptionButtons(hdc, &pPreviewData->rcDialogCaption, FALSE, pPreviewData->cyCaption - 2, theme);
 308
 309     /* Draw the dialog text */
 310     CopyRect(&rc, &pPreviewData->rcDialogClient);
 311     rc.left += 4;
 312     rc.top += 2;
 313     SetTextColor(hdc, theme->crColor[COLOR_BTNTEXT]);
 314     hOldFont = SelectObject(hdc, pPreviewData->hMessageFont);
 315     DrawText(hdc, pPreviewData->lpMessText, -1, &rc, DT_LEFT);
 316     SelectObject(hdc, hOldFont);
 317
 318     /* Draw Button */
 319     MyDrawFrameControl(hdc, &pPreviewData->rcDialogButton, DFC_BUTTON, DFCS_BUTTONPUSH, theme);
 320     CopyRect(&rc, &pPreviewData->rcDialogButton);
 321     SetTextColor(hdc, theme->crColor[COLOR_BTNTEXT]);
 322     hOldFont = SelectObject(hdc, pPreviewData->hMessageFont);
 323     DrawText(hdc, pPreviewData->lpButText, -1, &rc, DT_VCENTER | DT_CENTER | DT_SINGLELINE);
 324     SelectObject(hdc, hOldFont);
 325
 326     EndPaint(hwnd, &ps);
 327 }
 328
 329
 330 static VOID
 331 OnLButtonDown(HWND hwnd, int xPos, int yPos, PPREVIEW_DATA pPreviewData)
 332 {
 333     UINT type = IDX_DESKTOP;
 334     POINT pt;
 335
 336     pt.x = xPos;
 337     pt.y = yPos;
 338
 339     if (PtInRect(&pPreviewData->rcInactiveFrame, pt))
 340         type = IDX_INACTIVE_BORDER;
 341
 342     if (PtInRect(&pPreviewData->rcInactiveCaption, pt))
 343         type = IDX_INACTIVE_CAPTION;
 344
 345     if (PtInRect(&pPreviewData->rcInactiveCaptionButtons, pt))
 346         type = IDX_CAPTION_BUTTON;
 347
 348     if (PtInRect(&pPreviewData->rcActiveFrame, pt))
 349         type = IDX_ACTIVE_BORDER;
 350
 351     if (PtInRect(&pPreviewData->rcActiveCaption, pt))
 352         type = IDX_ACTIVE_CAPTION;
 353
 354     if (PtInRect(&pPreviewData->rcActiveCaptionButtons, pt))
 355         type = IDX_CAPTION_BUTTON;
 356
 357 //    if (PtInRect(&pPreviewData->rcSelectedMenuItem, pt))
 358 //        type = IDX_SELECTION;
 359
 360     if (PtInRect(&pPreviewData->rcActiveMenuBar, pt))
 361         type = IDX_MENU;
 362
 363     if (PtInRect(&pPreviewData->rcActiveClient, pt))
 364         type = IDX_WINDOW;
 365
 366     if (PtInRect(&pPreviewData->rcActiveScroll, pt))
 367         type = IDX_SCROLLBAR;
 368
 369     if (PtInRect(&pPreviewData->rcDialogFrame, pt))
 370         type = IDX_DIALOG;
 371
 372     if (PtInRect(&pPreviewData->rcDialogCaption, pt))
 373         type = IDX_ACTIVE_CAPTION;
 374
 375     if (PtInRect(&pPreviewData->rcDialogCaptionButtons, pt))
 376         type = IDX_CAPTION_BUTTON;
 377
 378     if (PtInRect(&pPreviewData->rcDialogButton, pt))
 379         type = IDX_3D_OBJECTS;
 380
 381     SendMessage(GetParent(hwnd),
 382                 WM_COMMAND,
 383                 MAKEWPARAM(GetWindowLongPtrW(hwnd, GWLP_ID), 0),
 384                 (LPARAM)type);
 385 }
 386
 387
 388 static VOID
 389 OnDestroy(PPREVIEW_DATA pPreviewData)
 390 {
 391     DeleteObject(pPreviewData->hbrScrollbar);
 392     DeleteObject(pPreviewData->hbrDesktop);
 393     DeleteObject(pPreviewData->hbrWindow);
 394
 395     DeleteObject(pPreviewData->hCaptionFont);
 396     DeleteObject(pPreviewData->hMenuFont);
 397     DeleteObject(pPreviewData->hMessageFont);
 398
 399     DestroyMenu(pPreviewData->hMenu);
 400
 401     LocalFree((HLOCAL)pPreviewData->lpInAct);
 402     LocalFree((HLOCAL)pPreviewData->lpAct);
 403     LocalFree((HLOCAL)pPreviewData->lpWinTxt);
 404     LocalFree((HLOCAL)pPreviewData->lpMessBox);
 405     LocalFree((HLOCAL)pPreviewData->lpMessText);
 406     LocalFree((HLOCAL)pPreviewData->lpButText);
 407 }
 408
 409
 410 static LRESULT CALLBACK
 411 PreviewWndProc(HWND hwnd,
 412                UINT uMsg,
 413                WPARAM wParam,
 414                LPARAM lParam)
 415 {
 416     PPREVIEW_DATA pPreviewData;
 417
 418     pPreviewData = (PPREVIEW_DATA)GetWindowLongPtr(hwnd, GWLP_USERDATA);
 419
 420     switch (uMsg)
 421     {
 422         case WM_CREATE:
 423             pPreviewData = (PPREVIEW_DATA)HeapAlloc(GetProcessHeap(),
 424                                                     HEAP_ZERO_MEMORY,
 425                                                     sizeof(PREVIEW_DATA));
 426             if (!pPreviewData)
 427                 return -1;
 428
 429             SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)pPreviewData);
 430             OnCreate(hwnd, pPreviewData);
 431             break;
 432
 433         case WM_SIZE:
 434             OnSize(LOWORD(lParam), HIWORD(lParam), pPreviewData);
 435             break;
 436
 437         case WM_PAINT:
 438             OnPaint(hwnd, pPreviewData);
 439             break;
 440
 441         case WM_LBUTTONDOWN:
 442             OnLButtonDown(hwnd, LOWORD(lParam), HIWORD(lParam), pPreviewData);
 443             break;
 444
 445         case WM_DESTROY:
 446             OnDestroy(pPreviewData);
 447             HeapFree(GetProcessHeap(), 0, pPreviewData);
 448             break;
 449
 450         case PVM_GETCYCAPTION:
 451             return pPreviewData->cyCaption;
 452
 453         case PVM_SETCYCAPTION:
 454             if ((INT)lParam > 0)
 455             {
 456                 pPreviewData->cyCaption = (INT)lParam;
 457                 CalculateItemSize(pPreviewData);
 458                 InvalidateRect(hwnd, NULL, FALSE);
 459             }
 460             break;
 461
 462         case PVM_GETCYMENU:
 463             return pPreviewData->cyMenu;
 464
 465         case PVM_SETCYMENU:
 466             if ((INT)lParam > 0)
 467             {
 468                 pPreviewData->cyMenu = (INT)lParam;
 469                 CalculateItemSize(pPreviewData);
 470                 InvalidateRect(hwnd, NULL, FALSE);
 471             }
 472             break;
 473
 474         case PVM_GETCXSCROLLBAR:
 475             return pPreviewData->cxScrollbar;
 476
 477         case PVM_SETCXSCROLLBAR:
 478             if ((INT)lParam > 0)
 479             {
 480                 pPreviewData->cxScrollbar = (INT)lParam;
 481                 CalculateItemSize(pPreviewData);
 482                 InvalidateRect(hwnd, NULL, FALSE);
 483             }
 484             break;
 485
 486         case PVM_GETCYSIZEFRAME:
 487             return pPreviewData->cySizeFrame;
 488
 489         case PVM_SETCYSIZEFRAME:
 490             if ((INT)lParam > 0)
 491             {
 492                 pPreviewData->cySizeFrame = (INT)lParam;
 493                 CalculateItemSize(pPreviewData);
 494                 InvalidateRect(hwnd, NULL, FALSE);
 495             }
 496             break;
 497
 498         case PVM_UPDATETHEME:
 499             UpdatePreviewTheme(hwnd, pPreviewData, (THEME *)lParam);
 500             break;
 501
 502         default:
 503             return DefWindowProc(hwnd, uMsg, wParam, lParam);
 504     }
 505     return FALSE;
 506 }
 507
 508
 509 BOOL
 510 RegisterPreviewControl(IN HINSTANCE hInstance)
 511 {
 512     WNDCLASSEX wc = {0};
 513
 514     wc.cbSize = sizeof(WNDCLASSEX);
 515     wc.lpfnWndProc = PreviewWndProc;
 516     wc.hInstance = hInstance;
 517     wc.hCursor = LoadCursor(NULL, IDC_ARROW);
 518     wc.hbrBackground = (HBRUSH)NULL;
 519     wc.lpszClassName = szPreviewWndClass;
 520
 521     return RegisterClassEx(&wc) != (ATOM)0;
 522 }
 523
 524
 525 VOID
 526 UnregisterPreviewControl(IN HINSTANCE hInstance)
 527 {
 528     UnregisterClass(szPreviewWndClass, hInstance);
 529 }