MFC开发

https://www.cnblogs.com/Alliswell-WP/p/CPlusPlus_MFC_01.html

 

#pragma once
#include <afxwin.h>

class MyApp :public CWinApp
{
public:
    virtual BOOL InitInstance();
};

class MyFrame :public CFrameWnd
{
public:
    MyFrame();

    //声明宏  提供消息映射机制
    DECLARE_MESSAGE_MAP();//消息映射宏，声明必须用在类声明中，即 .h 文件中
    afx_msg void OnLButtonDown(UINT, CPoint);//鼠标声明，value
    //afx_msg void OnChar(UINT, UINT, UINT);//键盘声明
    afx_msg void OnChar(UINT nChar,UINT nRepCnt,UINT nFlags);
    afx_msg void OnPaint();//绘画
};

 

#include "gui.h"

/**

//mfc文档
//https://docs.microsoft.com/zh-cn/cpp/mfc/reference/cwnd-class?view=msvc-170#onlbuttondown
*/


MyApp app;

BOOL MyApp::InitInstance()
{
    MyFrame* frame = new MyFrame;
    frame->ShowWindow(SW_SHOWNORMAL);
    frame->UpdateWindow();

    m_pMainWnd = frame; //保存框架的对象指针
    return TRUE;
}

//分界宏
BEGIN_MESSAGE_MAP(MyFrame, CFrameWnd)
    ON_WM_LBUTTONDOWN()//鼠标左键按下 key
    ON_WM_CHAR()//键盘按下
    ON_WM_PAINT()
END_MESSAGE_MAP()



MyFrame::MyFrame()
{
    Create(NULL, TEXT("mfc"));//创建窗口
}

void MyFrame::OnLButtonDown(UINT, CPoint point)
{//鼠标按下
/*
    TCHAR buf[1024];//TCHAR 是MFC中的字符数组
    wsprintf(buf,TEXT("x=%d,y=%d"),point.x,point.y);//转译
    MessageBox(buf);//区别于底层的MessageBox，MFC中实则是MessageBox method 在MSDN中可查
*/

    CString str;
    str.Format(TEXT("x=%d,,,y=%d"), point.x, point.y);//格式化
    MessageBox(str);
//mfc中的字符串 CString
    //CString str;
    //str.Format(TEXT("x=%d,,,y=%d"), point.x, point.y);//格式化
    //MessageBox(str);
}

void MyFrame::OnChar(UINT key, UINT nRepCnt, UINT nFlags) {//键盘按下
    CString str;
    str.Format(TEXT("按下了 %c 键"), key);
    MessageBox(str);
}
//
void MyFrame::OnPaint(){//绘画
    CPaintDC dc(this);//this指定绘图设备
    //帮助文档，在CDC里找其他能画的图形
    dc.TextOutA(100, 100, (CString)TEXT("为了部落"));
    dc.Ellipse(10, 10, 100, 100);//画椭圆，两点锁定矩形内切圆
}

 

 

void MyFrame::OnLButtonDown(UINT, CPoint point)
{//鼠标按下
/*
    TCHAR buf[1024];//TCHAR 是MFC中的字符数组
    wsprintf(buf,TEXT("x=%d,y=%d"),point.x,point.y);//转译
    MessageBox(buf);//区别于底层的MessageBox，MFC中实则是MessageBox method 在MSDN中可查
*/

    TCHAR buff[1024];
    wsprintf(buff, TEXT("x=%d,,y=%d"), point.x, point.y);
    MessageBox(buff);
//mfc中的字符串 CString
    //CString str;
    //str.Format(TEXT("x=%d,,,y=%d"), point.x, point.y);//格式化
    //MessageBox(str);
}