apps/tests/primitives/primitives.cpp

   1
   2 // ------------------------------------------------------------------
   3 // Windows 2000 Graphics API Black Book
   4 // Chapter 5 - Listing 5.1 (Output Primitives Demo)
   5 //
   6 // Created by Damon Chandler <dmc27@ee.cornell.edu>
   7 // Updates can be downloaded at: <www.coriolis.com>
   8 //
   9 // Please do not hesistate to e-mail me at dmc27@ee.cornell.edu
  10 // if you have any questions about this code.
  11 // ------------------------------------------------------------------
  12
  13
  14 //>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
  15 #include <windows.h>
  16 #include <cassert>
  17
  18 // for the MakeFont() function...
  19 #include "mk_font.h"
  20 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
  21
  22
  23 HINSTANCE hInst;
  24 const char* WndClassName = "GMainWnd";
  25 LRESULT CALLBACK MainWndProc(HWND HWnd, UINT Msg, WPARAM WParam,
  26    LPARAM LParam);
  27
  28
  29 int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE, LPTSTR,
  30    int nCmdShow)
  31 {
  32    hInst = hInstance;
  33
  34    WNDCLASS wc;
  35    memset(&wc, 0, sizeof(WNDCLASS));
  36
  37    wc.style = CS_VREDRAW | CS_HREDRAW;
  38    wc.lpszClassName = WndClassName;
  39    wc.lpfnWndProc = MainWndProc;
  40    wc.hInstance = hInst;
  41    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
  42    wc.hbrBackground = reinterpret_cast<HBRUSH>(
  43       COLOR_BTNFACE + 1
  44       );
  45
  46    if (RegisterClass(&wc))
  47    {
  48       HWND hWnd =
  49          CreateWindow(
  50             WndClassName, TEXT("Output Primitives Demo"),
  51             WS_OVERLAPPEDWINDOW | WS_CAPTION |
  52             WS_VISIBLE | WS_CLIPCHILDREN,
  53             CW_USEDEFAULT, CW_USEDEFAULT, 640, 480,
  54             NULL, NULL, hInst, NULL
  55             );
  56
  57       if (hWnd)
  58       {
  59          ShowWindow(hWnd, nCmdShow);
  60          UpdateWindow(hWnd);
  61
  62          MSG msg;
  63          while (GetMessage(&msg, NULL, 0, 0))
  64          {
  65              TranslateMessage(&msg);
  66              DispatchMessage(&msg);
  67          }
  68       }
  69     }
  70     return 0;
  71 }
  72 //------------------------------------------------------------------
  73
  74
  75 enum OutPrimitive {
  76    opLine, opBezier, opRectangle, opRoundRect,
  77    opEllipse, opArc, opPie, opChord, opCustom
  78    };
  79
  80 void DrawPrimitive(IN HDC hDC, IN const RECT& RPrimitive,
  81    IN OutPrimitive PrimitiveID)
  82 {
  83    RECT R = RPrimitive;
  84    InflateRect(&R, -10, -10);
  85
  86    switch (PrimitiveID)
  87    {
  88       case opLine:
  89       {
  90          const POINT PLine[] = {{R.left, R.top}, {R.right, R.bottom}};
  91          Polyline(hDC, PLine, 2);
  92          break;
  93       }
  94       case opBezier:
  95       {
  96          const POINT PControlPoints[] = {
  97             {R.left, R.top},
  98             {(R.right - R.left) / 2, R.top},
  99             {(R.right - R.left) / 2, R.bottom},
 100             {R.right, R.bottom}
 101             };
 102          PolyBezier(hDC, PControlPoints, 4);
 103          break;
 104       }
 105       case opRectangle:
 106       {
 107          Rectangle(hDC, R.left, R.top, R.right, R.bottom);
 108          break;
 109       }
 110       case opRoundRect:
 111       {
 112          RoundRect(hDC, R.left, R.top, R.right, R.bottom, 20, 20);
 113          break;
 114       }
 115       case opEllipse:
 116       {
 117          Ellipse(hDC, R.left, R.top, R.right, R.bottom);
 118          break;
 119       }
 120       case opArc:
 121       {
 122          const POINT PRads[] = {
 123             {(R.right - R.left) / 3 + R.left, R.top},
 124             {(R.right - R.left) / 3 + R.left, R.bottom}
 125             };
 126          Arc(hDC, R.left, R.top, R.right, R.bottom,
 127              PRads[0].x, PRads[0].y, PRads[1].x, PRads[1].y);
 128          break;
 129       }
 130       case opPie:
 131       {
 132          const POINT PRads[] = {
 133             {(R.right - R.left) / 3 + R.left, R.top},
 134             {(R.right - R.left) / 3 + R.left, R.bottom}
 135             };
 136          Pie(hDC, R.left, R.top, R.right, R.bottom,
 137              PRads[0].x, PRads[0].y, PRads[1].x, PRads[1].y);
 138          break;
 139       }
 140       case opChord:
 141       {
 142          const POINT PRads[] = {
 143             {(R.right - R.left) / 3 + R.left, R.top},
 144             {(R.right - R.left) / 3 + R.left, R.bottom}
 145             };
 146          Chord(hDC, R.left, R.top, R.right, R.bottom,
 147              PRads[0].x, PRads[0].y, PRads[1].x, PRads[1].y);
 148          break;
 149       }
 150       case opCustom:
 151       {
 152          const POINT PVertices[] = {
 153             {R.left, (R.bottom - R.top) / 2 + R.top},
 154             {(R.right - R.left) / 2 + R.left, R.top},
 155             {R.right, (R.bottom - R.top) / 2 + R.top},
 156             {(R.right - R.left) / 2 + R.left, R.bottom}
 157             };
 158          Polygon(hDC, PVertices, 4);
 159          break;
 160       }
 161    }
 162 }
 163 //------------------------------------------------------------------
 164
 165
 166 HWND hListBox = NULL;      // handle to the list box
 167 HBRUSH hListBrush = NULL;  // handle to the list box brush
 168 HPEN hListPen = NULL;      // handle to the list box pen
 169 HFONT hListFont = NULL;    // handle to the list box font
 170
 171 LRESULT CALLBACK MainWndProc(HWND hWnd, UINT msg, WPARAM wParam,
 172    LPARAM lParam)
 173 {
 174    switch (msg)
 175    {
 176       case WM_CREATE:
 177       {
 178          hListBox =
 179             CreateWindowEx(
 180                WS_EX_CLIENTEDGE, TEXT("LISTBOX"), TEXT(""),
 181                WS_CHILD | WS_VISIBLE | WS_VSCROLL |
 182                LBS_HASSTRINGS | LBS_NOINTEGRALHEIGHT |
 183                LBS_OWNERDRAWFIXED,
 184                0, 0, 640, 480,
 185                hWnd, NULL, hInst, NULL
 186                );
 187          assert(hListBox != NULL);
 188
 189          SetWindowLong(
 190             hListBox, GWL_ID, reinterpret_cast<LONG>(hListBox)
 191             );
 192
 193          SNDMSG(hListBox, LB_ADDSTRING, 0,
 194                 reinterpret_cast<LPARAM>(TEXT("Line")));
 195          SNDMSG(hListBox, LB_ADDSTRING, 0,
 196                 reinterpret_cast<LPARAM>(TEXT("Bezier Curve")));
 197          SNDMSG(hListBox, LB_ADDSTRING, 0,
 198                 reinterpret_cast<LPARAM>(TEXT("Rectangle")));
 199          SNDMSG(hListBox, LB_ADDSTRING, 0,
 200                 reinterpret_cast<LPARAM>(TEXT("Rounded Rectangle")));
 201          SNDMSG(hListBox, LB_ADDSTRING, 0,
 202                 reinterpret_cast<LPARAM>(TEXT("Ellipse")));
 203          SNDMSG(hListBox, LB_ADDSTRING, 0,
 204                 reinterpret_cast<LPARAM>(TEXT("Arc")));
 205          SNDMSG(hListBox, LB_ADDSTRING, 0,
 206                 reinterpret_cast<LPARAM>(TEXT("Pie Slice")));
 207          SNDMSG(hListBox, LB_ADDSTRING, 0,
 208                 reinterpret_cast<LPARAM>(TEXT("Chord")));
 209          SNDMSG(hListBox, LB_ADDSTRING, 0,
 210                 reinterpret_cast<LPARAM>(TEXT("Custom")));
 211
 212          hListBrush = CreateSolidBrush(PALETTERGB(64, 192, 64));
 213          hListPen = CreatePen(PS_SOLID, 3, PALETTERGB(0, 0, 0));
 214          HDC hScreenDC = GetDC(NULL);
 215 #if 0
 216          try
 217 #endif
 218          {
 219             // MakeFont() from Chapter 4
 220             hListFont = font::MakeFont(
 221                hScreenDC, "Impact", 20, ANSI_CHARSET,
 222                font::FS_BOLD | font::FS_UNDERLINE
 223                );
 224          }
 225 #if 0
 226          catch (...)
 227 #endif
 228          {
 229             ReleaseDC(NULL, hScreenDC);
 230          }
 231          ReleaseDC(NULL, hScreenDC);
 232
 233          break;
 234       }
 235       case WM_MEASUREITEM:
 236       {
 237          LPMEASUREITEMSTRUCT lpmis =
 238             reinterpret_cast<LPMEASUREITEMSTRUCT>(lParam);
 239          assert(lpmis != NULL);
 240
 241          if (lpmis->CtlID == reinterpret_cast<UINT>(hListBox))
 242          {
 243             lpmis->itemHeight = 150;
 244             return TRUE;
 245          }
 246          break;
 247       }
 248       case WM_DRAWITEM:
 249       {
 250          LPDRAWITEMSTRUCT lpdis =
 251             reinterpret_cast<LPDRAWITEMSTRUCT>(lParam);
 252          assert(lpdis != NULL);
 253
 254          if (lpdis->CtlID == reinterpret_cast<UINT>(hListBox))
 255          {
 256             SaveDC(lpdis->hDC);
 257 #if 0
 258             try
 259 #endif
 260             {
 261                SelectObject(lpdis->hDC, hListBrush);
 262                SelectObject(lpdis->hDC, hListPen);
 263                SelectObject(lpdis->hDC, hListFont);
 264
 265                bool selected = (lpdis->itemState & ODS_SELECTED);
 266                COLORREF clrText = GetSysColor(
 267                   selected ? COLOR_HIGHLIGHTTEXT : COLOR_WINDOWTEXT
 268                   );
 269                HBRUSH hListBrush = GetSysColorBrush(
 270                   selected ? COLOR_HIGHLIGHT : COLOR_WINDOW
 271                   );
 272
 273                // fill the background
 274                FillRect(lpdis->hDC, &lpdis->rcItem, hListBrush);
 275
 276                // render the output primitive
 277                RECT RPrimitive = lpdis->rcItem;
 278                InflateRect(&RPrimitive, -5, -5);
 279                RPrimitive.right = static_cast<int>(
 280                   0.6 * lpdis->rcItem.right + 0.5
 281                   );
 282                FillRect(
 283                   lpdis->hDC, &RPrimitive,
 284                   reinterpret_cast<HBRUSH>(COLOR_BTNFACE + 1)
 285                   );
 286                DrawPrimitive(
 287                   lpdis->hDC, RPrimitive,
 288                   static_cast<OutPrimitive>(lpdis->itemID)
 289                   );
 290                if (selected) InvertRect(lpdis->hDC, &RPrimitive);
 291                DrawEdge(lpdis->hDC, &RPrimitive, EDGE_SUNKEN, BF_RECT);
 292
 293                // render the text
 294                TCHAR text[13];
 295                if (SNDMSG(hListBox, LB_GETTEXT, lpdis->itemID,
 296                           reinterpret_cast<LPARAM>(&text)) != LB_ERR)
 297                {
 298                   RECT RText = RPrimitive;
 299                   RText.left =  RPrimitive.right;
 300                   RText.right = lpdis->rcItem.right;
 301
 302                   SelectObject(lpdis->hDC, hListFont);
 303                   SetBkMode(lpdis->hDC, TRANSPARENT);
 304                   SetTextColor(lpdis->hDC, clrText);
 305
 306                   DrawText(lpdis->hDC, text, -1, &RText,
 307                            DT_CENTER | DT_VCENTER | DT_SINGLELINE);
 308                }
 309
 310                // indicate keyboard focus
 311                if (lpdis->itemState & ODS_FOCUS)
 312                {
 313                   RECT RFocus = lpdis->rcItem;
 314                   InflateRect(&RFocus, -1, -1);
 315                   DrawFocusRect(lpdis->hDC, &RFocus);
 316                }
 317             }
 318 #if 0
 319             catch (...)
 320 #endif
 321             {
 322                RestoreDC(lpdis->hDC, -1);
 323             }
 324             RestoreDC(lpdis->hDC, -1);
 325             return TRUE;
 326          }
 327          break;
 328       }
 329       case WM_SIZE:
 330       {
 331          MoveWindow(
 332             hListBox, 0, 0, LOWORD(lParam), HIWORD(lParam), TRUE
 333             );
 334          return 0;
 335       }
 336       case WM_DESTROY:
 337       {
 338          if (hListBrush) DeleteObject(hListBrush);
 339          if (hListPen) DeleteObject(hListPen);
 340          if (hListFont) DeleteObject(hListFont);
 341
 342          PostQuitMessage(0);
 343          return 0;
 344       }
 345    }
 346    return DefWindowProc(hWnd, msg, wParam, lParam);
 347 }
 348 //-------------------------------------------------------------------------
 349
 350
 351