// Windows C 图形程序设计 矩形圆形 JXYX.cpp
// 定义应用程序进入点

#include <windows.h>
#include <math.h>
#include "JXYX.h"
#include "string.h"
#include "stdafx.h"
#include "resource.h"

#define MAX_LOADSTRING 100

// 公有变量
HINSTANCE hInst;    // 当前实例
HWND      hWndMain;
WPARAM    wParam;
TCHAR szTitle[MAX_LOADSTRING];  // 标题栏
TCHAR szWindowClass[MAX_LOADSTRING];

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

// Windows 应用程序入口点 WinMain
int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
 	// TODO: Place code here.
	MSG msg;
	HACCEL hAccelTable;

	// 初始化公有字符串
	LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
	LoadString(hInstance, IDC_JXYX, szWindowClass, MAX_LOADSTRING);
	MyRegisterClass(hInstance);

	// 初始化窗口，注册窗口 nCmdShow
    if (!InitInstance (hInstance, nCmdShow)) 
	{
		return FALSE;
	}

	hAccelTable = LoadAccelerators(hInstance, (LPCTSTR)IDC_JXYX);

	// 主消息循环，检索消息 GetMessage
	while (GetMessage(&msg, NULL, 0, 0)) 
	{
		if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) 
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}

	return msg.wParam;
}

// 注册窗口类，填写窗口属性 RegisterClass
ATOM MyRegisterClass(HINSTANCE hInstance)
{
	WNDCLASSEX wcex;

	wcex.cbSize = sizeof(WNDCLASSEX); 

	wcex.style			= CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc	= (WNDPROC)WndProc;
	wcex.cbClsExtra		= 0;
	wcex.cbWndExtra		= 0;
	wcex.hInstance		= hInstance;
	wcex.hIcon			= LoadIcon(hInstance, (LPCTSTR)IDI_JXYX);
	wcex.hCursor		= LoadCursor(NULL, IDC_ARROW);
	// 工作区背景颜色（画刷）
	// +2  +1  +0   -1  -2  -3
	// 黑  白  浅灰 灰  蓝  浅蓝
	wcex.hbrBackground	= (HBRUSH)(COLOR_WINDOW-3);
	wcex.lpszMenuName	= (LPCSTR)IDC_JXYX;
	wcex.lpszClassName	= szWindowClass;
	wcex.hIconSm		= LoadIcon(wcex.hInstance, (LPCTSTR)IDI_SMALL);

	return RegisterClassEx(&wcex);
}

BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   HWND hWnd;

   // 保存实例句柄
   hInst = hInstance; 

   // 创建窗口 CreateWindow
   hWnd = CreateWindow(
	   szWindowClass, 
	   // 窗口标题栏
	   "Visual C++ 6.0 Windows C 图形程序设计 ddxss",
	   WS_OVERLAPPEDWINDOW,
       CW_USEDEFAULT, 0, 
	   CW_USEDEFAULT, 0, 
	   NULL, NULL, hInstance, NULL);

   if (!hWnd)
   {
      return FALSE;
   }

   // 显示窗口 ShowWindow
   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);
   return TRUE;
}

// 窗口过程函数 WndProc，接收和处理消息
LRESULT CALLBACK WndProc(
		HWND hWnd,
		UINT message, 
		WPARAM wParam,
		LPARAM lParam)
{
	int wmId, wmEvent;
	PAINTSTRUCT ps;
	HDC hdc;
	static int fnPenStyle=PS_SOLID;  //画笔风格：实线
    static int nPenWidth=2;          //画笔宽度：
	static COLORREF crPenColor=0;    //画笔颜色：
	static COLORREF crBrushColor=0;  //画刷颜色：
	HPEN hPen;

	TCHAR szJXYX[MAX_LOADSTRING];


	// 装载字符串 "JXYX"
	LoadString(hInst, IDS_JXYX, szJXYX, MAX_LOADSTRING);

	int x0=400,y0=270,x,y;
	switch (message) 
	{
	    case WM_COMMAND:
			wmId    = LOWORD(wParam); 
			wmEvent = HIWORD(wParam); 

  // 菜单选择
			switch (wmId)
			{
				case IDM_ABOUT:
				   DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, (DLGPROC)About);
				   break;
				case IDM_EXIT:
				   DestroyWindow(hWnd);
				   break;
				default:
				   return DefWindowProc(hWnd, message, wParam, lParam);
			}
			break;

		case WM_PAINT:
  // 画图准备 BeginPaint
		hdc = BeginPaint(hWnd, &ps);

  // 添加画图代码
		hdc = GetDC(hWnd);  // 检取设备描述表

  // 矩形紫色边框线
  hPen=CreatePen(fnPenStyle,nPenWidth,crPenColor);
  SelectObject(hdc,hPen);
  Rectangle(hdc,x0-390,y0-240,x0+390,y0+240);

  // 上边小圆框
  for(x=x0-370;x<x0+360;x+=15)
  {
	 y=y0-220;
	 Ellipse(hdc,x,y,x+20,y+20);
  }

  // 右边小圆框
  for(y=y0-220;y<y0+210;y+=10)
  {
	 x=x0+350;
	 Ellipse(hdc,x,y,x+20,y+20);
  }

  // 下边小圆框
  for(x=x0-370;x<x0+360;x+=20)
  {
	 y=y0+200;
	 Ellipse(hdc,x,y,x+20,y+20);
  }

  // 左边小圆框
  for(y=y0-220;y<y0+210;y+=10)
  {
	 x=x0-370;
	 Ellipse(hdc,x,y,x+20,y+20);
  }

  // 中心圆形
  for(x=x0-300;x<x0+300;x+=200)
  {
	 y=y0-100;
	 Ellipse(hdc,x,y,x+200,y+200);
  }


  ReleaseDC(hWnd,hdc);
    RECT rt;
	GetClientRect(hWnd, &rt);

  // 输出文本 DrawText
			DrawText(hdc, szJXYX, strlen(szJXYX), &rt, DT_CENTER);

  // 结束画图 EndPaint
			EndPaint(hWnd, &ps);
			break;
		case WM_DESTROY:
			PostQuitMessage(0);
			break;
		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
   }
   return 0;
}

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

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