snake_design.cpp

// SnakeApp.cpp : Defines the entry point for the application.
//

#include <windows.h>
#include "framework.h"
#include "SnakeApp.h"
#include <objidl.h>
#include <gdiplus.h>
#include <gdiplusgraphics.h>
using namespace Gdiplus;
#pragma comment (lib,"Gdiplus.lib")


#define MAX_LOADSTRING 100

// Global Variables:
HINSTANCE hInst;                                // current instance
WCHAR szTitle[MAX_LOADSTRING];                  // The title bar text
WCHAR szWindowClass[MAX_LOADSTRING];            // the main window class name

// Forward declarations of functions included in this code module:
ATOM                MyRegisterClass(HINSTANCE hInstance);
BOOL                InitInstance(HINSTANCE, int);
LRESULT CALLBACK    WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK    About(HWND, UINT, WPARAM, LPARAM);

static RECT rcTarget;


VOID OnPaint(HDC hdc)
{
    Graphics graphics(hdc);

    //Snake Body
    Point points[] = { Point(100, 57),
                  Point(200, 100),
                  Point(300, 55),
                  Point(400, 120),
                  Point(500, 85),
                  Point(580, 150)
    };

    Point points1[] = { Point(105, 35),
                 Point(210, 90),
                 Point(310, 45),
                 Point(410, 105),
                 Point(510, 75), 
                 Point(580, 150)
                 };

    //Snake Eye
    Point points2[] = { Point(100, 60),
               Point(100, 60),
               Point(100, 60),
               Point(100, 60),
               Point(100, 60)
    };

    Pen      pen(Color(255, 0, 0, 255));
    //graphics.DrawCurve(&pen, points, 5, 0.0f); 
    //graphics.DrawCurve(&pen, points, 5, 0.06);
    //Snake Body
    graphics.DrawCurve(&pen, points, 6, 0.7f);
    graphics.DrawCurve(&pen, points1, 6, 0.8f);

    //Snake Eye
    graphics.DrawLine(&pen, 100, 40, 101, 44);

    graphics.DrawLine(&pen, 70, 50, 50, 55);
    graphics.DrawLine(&pen, 70, 50, 50, 40);

}

VOID DrawArc(HDC hdc)
{
    Graphics graphics(hdc);

    // Set up the arc.
    Pen pen(Color(255, 0, 0, 255));
    REAL x = 65;
    REAL y = 37;
    REAL width = 80.0f;
    REAL height = 20.0f;
    REAL startAngle = 115.0f;
    REAL sweepAngle = 190.0f;

    // Draw the arc.
    graphics.DrawArc(&pen, x, y, width, height, startAngle, sweepAngle);
}

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

int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
                     _In_opt_ HINSTANCE hPrevInstance,
                     _In_ LPWSTR    lpCmdLine,
                     _In_ int       nCmdShow)
{
    UNREFERENCED_PARAMETER(hPrevInstance);
    UNREFERENCED_PARAMETER(lpCmdLine);

    GdiplusStartupInput gdiplusStartupInput;
    ULONG_PTR           gdiplusToken;
    MSG                 msg;

    // Initialize global strings
    LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
    LoadStringW(hInstance, IDC_SNAKEAPP, szWindowClass, MAX_LOADSTRING);
    MyRegisterClass(hInstance);

    GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

    // Perform application initialization:
    if (!InitInstance (hInstance, nCmdShow))
    {
        return FALSE;
    }

    HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_SNAKEAPP));

    // Main message loop:
    while (GetMessage(&msg, nullptr, 0, 0))
    {
        if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }

    return (int) msg.wParam;
}



//
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
    WNDCLASSEXW wcex;

    wcex.cbSize = sizeof(WNDCLASSEX);

    wcex.style          = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc    = WndProc;
    wcex.cbClsExtra     = 0;
    wcex.cbWndExtra     = 0;
    wcex.hInstance      = hInstance;
    wcex.hIcon          = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_SNAKEAPP));
    wcex.hCursor        = LoadCursor(nullptr, IDC_ARROW);
    wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);
    wcex.lpszMenuName   = MAKEINTRESOURCEW(IDC_SNAKEAPP);
    wcex.lpszClassName  = szWindowClass;
    wcex.hIconSm        = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

    return RegisterClassExW(&wcex);
}

//
//   FUNCTION: InitInstance(HINSTANCE, int)
//
//   PURPOSE: Saves instance handle and creates main window
//
//   COMMENTS:
//
//        In this function, we save the instance handle in a global variable and
//        create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   hInst = hInstance; // Store instance handle in our global variable

   HWND hWnd = CreateWindowW(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, nullptr, nullptr, hInstance, nullptr);

   if (!hWnd)
   {
      return FALSE;
   }

   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);

   return TRUE;
}

//
//  FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
//  PURPOSE: Processes messages for the main window.
//
//  WM_COMMAND  - process the application menu
//  WM_PAINT    - Paint the main window
//  WM_DESTROY  - post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_COMMAND:
        {
            int wmId = LOWORD(wParam);
            // Parse the menu selections:
            switch (wmId)
            {
            case IDM_ABOUT:
                DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
                break;
            case IDM_EXIT:
                DestroyWindow(hWnd);
                break;
            default:
                return DefWindowProc(hWnd, message, wParam, lParam);
            }
        }
        break;
    case WM_PAINT:
        {
            PAINTSTRUCT ps;
            HDC hdc = BeginPaint(hWnd, &ps);
            OnPaint(hdc);
            DrawArc(hdc);
            Ellipse(ps.hdc, rcTarget.left, rcTarget.top,
                rcTarget.right, rcTarget.bottom);
            EndPaint(hWnd, &ps);
        }
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}

// Message handler for about box.
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
    UNREFERENCED_PARAMETER(lParam);
    switch (message)
    {
    case WM_INITDIALOG:
        return (INT_PTR)TRUE;

    case WM_COMMAND:
        if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
        {
            EndDialog(hDlg, LOWORD(wParam));
            return (INT_PTR)TRUE;
        }
        break;
    }
    return (INT_PTR)FALSE;
}