【SDK编程】仿微软记事本V2.0

更新：
更换了ico.....
新增选择字体和颜色的功能；
修正：
资源文件都已经打包到工程目录里了，路径也改成了相对路径；
解决了保存100KB以上的文件会丢失数据的问题。

核心代码：
#include "resource.h"
#include <windows.h>
#include <stdio.h>
#include <Richedit.h>
#include <shlwapi.h>
#pragma comment(lib,"shlwapi.lib")
#define WM_FILENAME WM_USER+1//自定义消息，这个消息用来发送用户选择的文件全路径
#define OPEN                WM_USER+2//一个Flag，标识这个文件是在打开对话框里选择的还是保存对话框
#define SAVE                 WM_USER+3

INT_PTR ExitCode1;//用来保存主对话框的退出代码
INT_PTR ExitCode2;//About对话框的退出代码
HINSTANCE hMain;//用来保存实例句柄
//主对话框过程函数声明
INT_PTR CALLBACK DialogProc(HWND hwndDlg,UINT uMsg,WPARAM wParam,LPARAM lParam);
//About对话框过程函数声明
INT_PTR CALLBACK AboutProc(HWND hwndDlg,UINT uMsg,WPARAM wParam,LPARAM lParam);

BOOL OnInitDialog(HWND hwndDlg);//相应WM_ONINITDIALOG消息时调用的函数
BOOL OnOpen(HWND hwndDlg,DWORD Flag);//当用户点击Open菜单项时调用
//void GetTitle(char *pSourceBuf,char *pDestBuf);
void ChooseFont(HWND hwndDlg,CHOOSEFONT &font,LOGFONT &log);

int WINAPI WinMain(HINSTANCE hIns,HINSTANCE hPrev,LPSTR lpCmd,int nShowCmd)//入口函数
{
    LoadLibrary("Riched20.dll");//要用Rich Edit控件就必须要先加载这个库，否则程序无法运行
    hMain=hIns;
    ExitCode1=DialogBox(hIns,MAKEINTRESOURCE(IDD_DIALOG1),NULL,DialogProc);//创建主对话框
    return 0;
}

//主对话框过程函数
INT_PTR CALLBACK DialogProc(HWND hwndDlg,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
    switch(uMsg)
    {
    case WM_INITDIALOG://初始化
        OnInitDialog(hwndDlg);
        break;
    //当用户改变主对话框的大小时，Edit控件大小也应该改变。
    case WM_SIZE:
        {
            RECT rect;
            ZeroMemory(&rect,sizeof(RECT));
            GetWindowRect(hwndDlg,&rect);//获取主对话框窗口的大小，详见MSDN
            HWND hEdit=GetDlgItem(hwndDlg,IDC_TEXT);
            //改变Edit控件的大小
            SetWindowPos(hEdit,HWND_TOP,0,0,rect.right-rect.left-5,rect.bottom-rect.top-50,SWP_SHOWWINDOW);
            CloseHandle(hEdit);

        }
        break;
    case WM_COMMAND:
        if(IDM_OPEN==wParam)//Open被用户点击
            OnOpen(hwndDlg,OPEN);
        if(IDM_EXIT==wParam)//Exit被用户点击
            SendMessage(hwndDlg,WM_CLOSE,NULL,NULL);//发送WM_CLOSE消息
        if(IDM_ABOUT==wParam)//About被点击，创建ABOUT对话框
            ExitCode2=DialogBox(hMain,MAKEINTRESOURCE(IDD_ABOUT),hwndDlg,AboutProc);
        if(IDM_SAVE==wParam)//用户点击Save
        {
          
            OnOpen(hwndDlg,SAVE);
        }
        if(IDM_CLOSEFILE==wParam)
        {
            SetDlgItemText(hwndDlg,IDC_TEXT,"");
            SetWindowText(hwndDlg,"NotePadV2.0  By 小司");
        }
        if(IDM_FORMAT==LOWORD(wParam))
        {
            LOGFONT log;
            CHOOSEFONT font;
            CHARFORMAT2 cm;
            ZeroMemory(&cm,sizeof(cm));

            ChooseFont(hwndDlg,font,log);
            if(ChooseFont(&font))
            {

                strcpy(cm.szFaceName,log.lfFaceName);
                cm.cbSize=sizeof(cm);
                cm.dwMask=CFM_FACE | CFM_SIZE | CFM_WEIGHT | CFM_COLOR;
                cm.yHeight=log.lfHeight * log.lfHeight;
                cm.wWeight=log.lfWeight;
                cm.bPitchAndFamily=log.lfPitchAndFamily;
                cm.crTextColor=font.rgbColors;

                HWND hText=GetDlgItem(hwndDlg,IDC_TEXT);
                SendMessage(hText,EM_SETCHARFORMAT,SCF_ALL,(LPARAM)&cm);
            }
           
        }
        break;
    case WM_FILENAME://自定义的消息，用来接收文件路径
        if(OPEN==lParam)
        {
            //打开文件的目的是为了用GetFileSize函数获取文件大小
            HANDLE hFile=CreateFile((LPCSTR)wParam,GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,
                                FILE_ATTRIBUTE_NORMAL,NULL);
            if(INVALID_HANDLE_VALUE==hFile)
            {
                MessageBox(hwndDlg,"Open File Failed!","Error",0);
                CloseHandle(hFile);
                break;
            }
            DWORD dwFileSize=GetFileSize(hFile,NULL);//获取文件大小
            CloseHandle(hFile);

            TCHAR *pszData=new TCHAR[dwFileSize];
            memset(pszData,0,dwFileSize);
           
            FILE *fp=fopen((char*)wParam,"r");//wParam里保存了文件的路径
            fread(pszData,dwFileSize,1,fp);
            fclose(fp);
            SetDlgItemText(hwndDlg,IDC_TEXT,pszData);//显示数据
        }

        if(SAVE==lParam)
        {
            HWND hText=GetDlgItem(hwndDlg,IDC_TEXT);
            int len=GetWindowTextLength(hText);

            TCHAR *pBuf=new TCHAR[len];
            memset(pBuf,0,len);
            GetDlgItemText(hwndDlg,IDC_TEXT,pBuf,len);

            char szFilePath[MAX_PATH+10];
            sprintf_s(szFilePath,"%s.txt",(char*)wParam);//凑出来.txt

            FILE *fp=fopen(szFilePath,"w");
            fwrite(pBuf,1,len,fp);
            fclose(fp);
        }
        break;
        //这个消息无用，调试用的..
    case WM_LBUTTONDOWN:

        break;
    case WM_CLOSE:
        if(IDYES==MessageBox(hwndDlg,"Are you sure to exit?","Warming",MB_YESNO | MB_ICONWARNING))
        {
            EndDialog(hwndDlg,ExitCode1);
            break;
        }
        break;
    default:
        break;
    }
    return FALSE;
}

//about窗口过程函数
INT_PTR CALLBACK AboutProc(HWND hwndDlg,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
    switch(uMsg)
    {
    case WM_CLOSE:
        EndDialog(hwndDlg,ExitCode2);
        break;
    case WM_COMMAND:
        if(IDOK==wParam)
        {
            SendMessage(hwndDlg,WM_CLOSE,NULL,NULL);
        }
        break;
    default:
        break;
    }
    return FALSE;
}
BOOL OnInitDialog(HWND hwndDlg)
{
    HICON hIcon=LoadIcon(hMain,MAKEINTRESOURCE(IDI_ICON1));//载入图标
    SendMessage(hwndDlg,WM_SETICON,ICON_SMALL,(LPARAM)hIcon);//设置图标
    return TRUE;
}
BOOL OnOpen(HWND hwndDlg,DWORD Flag)
{
    //见MSDN中关于GetOpenFileName的说明
    TCHAR szFile[MAX_PATH];
    TCHAR szFileTitle[MAX_PATH];
    OPENFILENAME op;
    memset(szFile,0,MAX_PATH);
    memset(szFileTitle,0,MAX_PATH);

    ZeroMemory(&op,sizeof(op));
    op.lStructSize=sizeof(op);
    op.hwndOwner=hwndDlg;
    op.lpstrFile=szFile;
    op.nMaxFile=MAX_PATH;
    op.lpstrFilter="All\0*.*\0文本文件(*.txt)\0*.txt\0";
    op.nFilterIndex=2;
    op.lpstrFileTitle=NULL;
    op.nMaxFileTitle=0;
    op.lpstrInitialDir=NULL;
    op.Flags=OFN_EXPLORER | OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST | OFN_OVERWRITEPROMPT;

    if(OPEN==Flag)
    {
        if(GetOpenFileName(&op))
        {//把文件的路径发送给主对话框
            StrCpy(szFileTitle,szFile);
            PathStripPath(szFileTitle);
            SetWindowText(hwndDlg,szFileTitle);
            SendMessage(hwndDlg,WM_FILENAME,(WPARAM)szFile,(LPARAM)Flag);
        }
    }
    if(SAVE==Flag)
    {
        if(GetSaveFileName(&op))
        {
            SendMessage(hwndDlg,WM_FILENAME,(WPARAM)szFile,(LPARAM)Flag);
        }
    }
    return TRUE;
}

void ChooseFont(HWND hwndDlg,CHOOSEFONT &font,LOGFONT &log)
{
    TCHAR szStyle[256];
    HDC dc=GetDC(NULL);
    memset(szStyle,0,256);
    WORD wFontType=0;
    COLORREF color=RGB(0,0,0);
    ZeroMemory(&log,sizeof(log));

    ZeroMemory(&font,sizeof(font));
    font.lStructSize=sizeof(font);
    font.hwndOwner=hwndDlg;
    font.lpLogFont=&log;
    font.Flags=CF_EFFECTS | CF_FORCEFONTEXIST | CF_BOTH;
    font.rgbColors=color;
    font.lpszStyle=szStyle;
    font.hDC=dc;
    font.nFontType=wFontType;

}