fileopen.cpp

开发工具选用eMbedded visual c++4

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

#include "stdafx.h"
#include <winbase.h>
#include <windowsx.h>        
#include <commctrl.h>
#include <Commdlg.h>
#include "FileOpen.h"

#define MAX_LOADSTRING 100

//constants for FileOpen
#define FILE_SAVE   0
#define FILE_OPEN   1

// Global Variables:
HINSTANCE    hInst;                              // The current instance
HWND              hwndCB;                        // The command bar handle
DWORD           dwFileCreateFlags;        // Flags for CreateFile
CHAR               szPath[MAX_PATH];   // Initial Directory for OpenFile Dlg      

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

BOOL CALLBACK ChooseFilePathDlgProc(HWND, UINT, WPARAM, LPARAM );
BOOL CALLBACK ChooseFilePermsDlgProc(HWND, UINT, WPARAM, LPARAM );
LPOPENFILENAME DoFileOpen (HWND, int);

int WINAPI WinMain(    HINSTANCE hInstance,
                                         HINSTANCE hPrevInstance,
                                         LPTSTR    lpCmdLine,
                                         int       nCmdShow)
{
    MSG msg;
    HACCEL hAccelTable;

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

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

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

    return msg.wParam;
}

//
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
//  COMMENTS:
//
//    This function and its usage is only necessary if you want this code
//    to be compatible with Win32 systems prior to the 'RegisterClassEx'
//    function that was added to Windows 95. It is important to call this function
//    so that the application will get 'well formed' small icons associated
//    with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance, LPTSTR szWindowClass)
{
    WNDCLASS    wc;

    wc.style            = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc        = (WNDPROC) WndProc;
    wc.cbClsExtra        = 0;
    wc.cbWndExtra        = 0;
    wc.hInstance        = hInstance;
    wc.hIcon            = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_FILEOPEN));
    wc.hCursor            = 0;
    wc.hbrBackground    = (HBRUSH) GetStockObject(WHITE_BRUSH);
    wc.lpszMenuName        = 0;
    wc.lpszClassName    = szWindowClass;

    return RegisterClass(&wc);
}

//
//  FUNCTION: InitInstance(HANDLE, 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)
{
    HWND    hWnd;
    TCHAR    szTitle[MAX_LOADSTRING];            // The title bar text
    TCHAR    szWindowClass[MAX_LOADSTRING];        // The window class name

    hInst = hInstance;        // Store instance handle in our global variable
    // Initialize global strings
    LoadString(hInstance, IDC_FILEOPEN, szWindowClass, MAX_LOADSTRING);
    MyRegisterClass(hInstance, szWindowClass);

    LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
    hWnd = CreateWindow(szWindowClass, szTitle, WS_VISIBLE,
        0, 0, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL);

    if (!hWnd)
    {    
        return FALSE;
    }

    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);
    if (hwndCB)
        CommandBar_Show(hwndCB, TRUE);

    return TRUE;
}

//
//  FUNCTION: WndProc(HWND, unsigned, WORD, LONG)
//
//  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)
{
    HDC hdc;
    int wmId, wmEvent;
    PAINTSTRUCT ps;
    TCHAR szHello[MAX_LOADSTRING];
    LPOPENFILENAME lpof;
    HANDLE hTestFile;

    switch (message) 
    {
        case WM_COMMAND:
            wmId    = LOWORD(wParam); 
            wmEvent = HIWORD(wParam); 
            // Parse the menu selections:
            switch (wmId)
            {
                case IDM_OPEN_FILE:
                    DialogBox( hInst, TEXT("Pathnames"), hWnd, 
                                           ChooseFilePathDlgProc ); 
                    DialogBox( hInst, TEXT("FILE_PERMISSIONS"), hWnd, 
                                           ChooseFilePermsDlgProc ); 
                    lpof = DoFileOpen( hWnd, FILE_OPEN );
                    if(!lpof)
                    {
                        break;
                    }

                       //Open the file for reading.
                    hTestFile = CreateFile( (LPTSTR)lpof->lpstrFile,
                          GENERIC_READ | GENERIC_WRITE ,
                          FILE_SHARE_READ, NULL, dwFileCreateFlags, 
                          FILE_ATTRIBUTE_NORMAL, NULL);
                    if( !hTestFile )
                    {
                        MessageBox( hWnd, TEXT("Try Different Permissions"),
                                    TEXT("File Open Failed"), MB_OK );
                        break;
                    }
                    if( dwFileCreateFlags == OPEN_EXISTING )
                        MessageBox( hWnd, lpof->lpstrFile,
                                    TEXT("Existing File Opened"), MB_OK );
                    {

                    }
                    if( dwFileCreateFlags == CREATE_NEW  )
                    {
                        MessageBox( hWnd, lpof->lpstrFile,
                                    TEXT("New File Created"), MB_OK );

                    }
                    CloseHandle(hTestFile );
                   break;

                case IDM_HELP_ABOUT:
                   DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, 
                                            (DLGPROC)About);
                   break;
                case IDM_FILE_EXIT:
                   DestroyWindow(hWnd);
                   break;
                default:
                   return DefWindowProc(hWnd, message, wParam, lParam);
            }
            break;
        case WM_CREATE:
            hwndCB = CommandBar_Create(hInst, hWnd, 1);            
            CommandBar_InsertMenubar(hwndCB, hInst, IDM_MENU, 0);
            CommandBar_AddAdornments(hwndCB, 0, 0);
            break;
        case WM_PAINT:
            RECT rt;
            hdc = BeginPaint(hWnd, &ps);
            GetClientRect(hWnd, &rt);
            LoadString(hInst, IDS_HELLO, szHello, MAX_LOADSTRING);
            DrawText(hdc, szHello, _tcslen(szHello), &rt, 
                                        DT_SINGLELINE | DT_VCENTER | DT_CENTER);
            EndPaint(hWnd, &ps);
            break;
        case WM_DESTROY:
            CommandBar_Destroy(hwndCB);
            PostQuitMessage(0);
            break;
        default:
            return DefWindowProc(hWnd, message, wParam, lParam);
   }
   return 0;
}

// Mesage handler for the About box.
LRESULT CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
    RECT rt, rt1;
    int DlgWidth, DlgHeight;    // dialog width and height in pixel units
    int NewPosX, NewPosY;

    switch (message)
    {
        case WM_INITDIALOG:
            // trying to center the About dialog
            if (GetWindowRect(hDlg, &rt1)) {
                GetClientRect(GetParent(hDlg), &rt);
                DlgWidth    = rt1.right - rt1.left;
                DlgHeight    = rt1.bottom - rt1.top ;
                NewPosX        = (rt.right - rt.left - DlgWidth)/2;
                NewPosY        = (rt.bottom - rt.top - DlgHeight)/2;
                
                // if the About box is larger than the physical screen 
                if (NewPosX < 0) NewPosX = 0;
                if (NewPosY < 0) NewPosY = 0;
                SetWindowPos(hDlg, 0, NewPosX, NewPosY,
                    0, 0, SWP_NOZORDER | SWP_NOSIZE);
            }
            return TRUE;

        case WM_COMMAND:
            if ((LOWORD(wParam) == IDOK) || (LOWORD(wParam) == IDCANCEL))
            {
                EndDialog(hDlg, LOWORD(wParam));
                return TRUE;
            }
            break;
    }
    return FALSE;
}
 
BOOL CALLBACK ChooseFilePathDlgProc(HWND hDlg, 
                                                                            UINT message, 
                                                                            WPARAM wParam, 
                                                                             LPARAM lParam)
{

    TCHAR      tszPlatType[12];
    int        i, rc, iBaseStringID, iMaxStringID;
    int        iSel, iLen;
    short int  wCharCnt;
    LPCTSTR    lpszPathString;
    LPTSTR    lpszPath;
    LPBYTE     lpbStrlen;
    HWND       hWndList;

    switch (message)
    {
        case WM_INITDIALOG:
         hWndList = GetDlgItem(hDlg,IDC_PATHNAMES );
        //Init paths list based on platform type
        memset( &tszPlatType, 0x0, sizeof(tszPlatType));
        rc = SystemParametersInfo( SPI_GETPLATFORMTYPE, 
                                    sizeof(tszPlatType),
                                    &tszPlatType, 0);
        if( (lstrcmp( tszPlatType, TEXT("Jupiter") ) == 0 )
                            ||
           ( lstrcmp( tszPlatType, TEXT("HPC") ) == 0 ) )
        { 
            iBaseStringID = IDS_HPC_PATH1;
            iMaxStringID  = IDS_HPC_PATH11;
        }
        
        if( lstrcmp( tszPlatType, TEXT("Palm PC") ) == 0 )
        { 
            iBaseStringID = IDS_PPC_PATH1;
            iMaxStringID  = IDS_PPC_PATH7;
        }

        for( i = iBaseStringID; i < iMaxStringID; i++ )
        {
            lpszPathString = 
                (LPCTSTR)LoadString(hInst, i, NULL, NULL);
            lpbStrlen = (LPBYTE)lpszPathString;
            lpbStrlen -= 2 * sizeof( BYTE );
            wCharCnt = (short int)(*lpbStrlen);
            lpszPath = (LPTSTR)LocalAlloc( LPTR, (wCharCnt + 1) * sizeof(TCHAR));
            LoadString(hInst, i, lpszPath, (int)wCharCnt + 1);
            ListBox_InsertString(hWndList, -1, lpszPath);
            LocalFree(lpszPath);
        }
            return TRUE;

        case WM_COMMAND:
            if(LOWORD(wParam) == IDOK) 
            {
               //set path from ctrl input
               //get the sel item
               hWndList = GetDlgItem(hDlg,IDC_PATHNAMES );
               iSel = SendMessage(hWndList, LB_GETCURSEL, 0, 0 );
               //copy sel item text
               memset( szPath, 0x0, sizeof(szPath) );
               SendMessage(hWndList,LB_GETTEXT, iSel, 
                           (LPARAM)(LPCTSTR) &szPath );
               EndDialog(hDlg, LOWORD(wParam));
               return TRUE;
            }

             if (LOWORD(wParam) == IDCANCEL)
             {
                //set path NULL
               memset( szPath, 0x0, sizeof(szPath) );
              EndDialog(hDlg, LOWORD(wParam));
             return TRUE;
            }
            break;
    }
    return FALSE;

//fail and bail
FAIL:
    MessageBox( hDlg, TEXT( "Couldn't Allocate Memory"), 
                      TEXT( "Choose Path Failed" ), MB_OK);
    return FALSE;

}
BOOL CALLBACK ChooseFilePermsDlgProc(HWND hDlg, 
                                                                               UINT message, 
                                                                               WPARAM wParam, 
                                                                                LPARAM lParam)
{

    int i, iButtonState;

    switch (message)
    {

        case WM_INITDIALOG:
            SendDlgItemMessage( hDlg, IDC_CREATE_NEW, 
                                BM_SETCHECK, BST_CHECKED ,0 );
            break;

        case WM_COMMAND:
            if(LOWORD(wParam) == IDOK)
            {
              //set open permissions from ctrl input
              iButtonState = 
                SendDlgItemMessage( hDlg, IDC_CREATE_NEW, BM_GETSTATE, 0,0 );
              if( iButtonState == BST_CHECKED )
                {
                    dwFileCreateFlags = CREATE_NEW;
                }
               else
               {
                    dwFileCreateFlags = OPEN_EXISTING;
               } 

             EndDialog(hDlg, LOWORD(wParam));
            }

             if(LOWORD(wParam) == IDCANCEL)
             {
                //set open permissions NULL
                 dwFileCreateFlags = NULL;
                 EndDialog(hDlg, LOWORD(wParam));

             }
             return TRUE;

            break;
    }
    return FALSE;
}
//----------------------------------------------------------------------
// Common File Dialog - Open a schema
//----------------------------------------------------------------------

LPOPENFILENAME DoFileOpen(HWND hWnd, int iOpenSaveFlag)
{
    TCHAR*  pszFileName;
    const LPTSTR pszOpenFilter = TEXT ("All Documents (*.*)\0*.*\0\0");
    LPOPENFILENAME lpof;

    // Allocate space for the OPENFILENAME struct
    lpof = (LPOPENFILENAME)LocalAlloc(LPTR,sizeof (OPENFILENAME));
    if (!lpof) 
        { goto FAIL;}

    // Allocate space for the FILENAME string
    pszFileName = (TCHAR*)LocalAlloc(LPTR, MAX_PATH);
    if (!pszFileName) 
        { goto FAIL;}

    // Make the first char null, as we don't want the 
    // dialog to init the  filename edit ctl.
  //  pszFileName[0] = '\0';

    // Initialize File Open structure.
    lpof->lStructSize = sizeof (OPENFILENAME);
    lpof->hwndOwner = hWnd;
    lpof->lpstrFile = pszFileName;
    lpof->nMaxFile  = MAX_PATH;
    lpof->lpstrFilter = pszOpenFilter;
    lpof->lpstrInitialDir = (LPCWSTR)&szPath[0];
 
    if (iOpenSaveFlag ==  FILE_SAVE)
 {
    //prompt for overwrite, send files to sync directory
    lpof->Flags = OFN_OVERWRITEPROMPT;


     if( !GetSaveFileName (lpof))
     {
            lpof = NULL;
     }
 }
else
{

     if( !GetOpenFileName (lpof))
         {
            lpof = NULL;
         }
}
 //it's all good  
    return lpof;

//fail and bail
FAIL:
    MessageBox( hWnd, TEXT( "Couldn't Allocate Memory"), 
                      TEXT( "OpenFile Failed" ), MB_OK);
        return 0;
}