GDI ---Shapes

最新推荐文章于 2025-01-10 09:50:24 发布

原创最新推荐文章于 2025-01-10 09:50:24 发布 · 589 阅读

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#include <windows.h>

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
    PWSTR lpCmdLine, int nCmdShow)
{
  MSG  msg;
  WNDCLASSW wc = {0};

  wc.style = CS_HREDRAW | CS_VREDRAW;
  wc.lpszClassName = L"Shapes";
  wc.hInstance     = hInstance;
  wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
  wc.lpfnWndProc   = WndProc;
  wc.hCursor       = LoadCursor(0, IDC_ARROW);

  RegisterClassW(&wc);
  CreateWindowW(wc.lpszClassName, L"Shapes",
        WS_OVERLAPPEDWINDOW | WS_VISIBLE,
        100, 100, 390, 230, NULL, NULL, hInstance, NULL);

  while( GetMessage(&msg, NULL, 0, 0)) {
      DispatchMessage(&msg);
  }

  return (int) msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, 
    WPARAM wParam, LPARAM lParam)
{
  HDC hdc;
  PAINTSTRUCT ps;
  const POINT polygon[10] = { 30, 145, 85, 165, 105, 
      110, 65, 125, 30, 105 };
  const POINT bezier[4] = {280, 160, 320, 160, 
      325, 110, 350, 110};

  switch(msg)
  {
    case WM_PAINT:

      hdc = BeginPaint(hwnd, &ps);

      Ellipse(hdc, 30, 30, 120, 90);
      RoundRect(hdc, 150, 30, 240, 90, 15, 20);
      Chord(hdc, 270, 30, 360, 90, 270, 45, 360, 45);
      Polygon(hdc, polygon, 5);
      Rectangle(hdc, 150, 110, 230, 160);
      PolyBezier(hdc, bezier, 4);

      EndPaint(hwnd, &ps);
      break;

    case WM_DESTROY:

      PostQuitMessage(0);
      return 0;
  }

  return DefWindowProcW(hwnd, msg, wParam, lParam);
}