ScanDirectory Callback

The ScanDirectory method of the App object calls this Callback function:

• On entering a directory;
• On leaving a directory;
• When a file is found.

Callback Function Protype

function ScanCallback(directory_Flag, file_Object)
{

}

directory_Flag

• 2: Entering the main directory. The main directory is the argument passed to ScanDirectory
• -2: Leaving the main directory.
• 1: Entering a sub-directory.
• -1: Leaving a sub-directory.
• 0: A file is found.

Return value

• 1 (or no return value): Continue the scanning;
• 0: Skip this sub-directory;
• -1: Abort the scanning;

Sample Callback Function

function ScanCallback(dirFlag, fo)
{
    switch(dirFlag)
    {
    case 2:
        app.Print("\nStart scanning " + fo.FullPath+"\n");
    case -2:
       app.Print("\nFinished scanning " + fo.FullPath+"\n");
        break;
    case 0:
       app.Print("File: " + fo.FullPath + "\n");
        break;
    case 1:
        app.Print("Begin scanning sub-directory "+fo.FullPath+"\n");
        break;
    case -1:
        app.Print("End of scanning sub-directory "+fo.FullPath+"\n");
        break;
    }

    if(app.kbhit()) //user pressed a key?
    {
        var ch=app.getch(); //Read the key without displaying it
        if(ch==27) //If the key is ESC
        {
            app.Print("*** Abort ***\n");
            return(-1); 
        }
    }
}