qtdeclarative/examples/tutorials/gettingStarted/gsQml/filedialog/directory.cpp

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#include "directory.h"
#include <QDebug>

/*
Directory constructor

Initialize the saves directory and creates the file list
*/
Directory::Directory(QObject *parent) : QObject(parent)
{
    m_dir.cd( QDir::currentPath() );

    //go to the saved directory. if not found, create save directory
    m_saveDir = "saves";
    if ( m_dir.cd(m_saveDir) == 0 ) {
        m_dir.mkdir(m_saveDir);
        m_dir.cd(m_saveDir);
    }
     m_filterList << "*.txt";
    refresh();
}

/*
Directory::filesNumber
Return the number of Files
*/
int Directory::filesCount() const
{
    return m_fileList.size();
}

/*
Function called to append data onto list property
*/
void appendFiles(QDeclarativeListProperty<File> * property, File * file)
{
    Q_UNUSED(property);
    Q_UNUSED(file);
    //Do nothing. can't add to a directory using this method
}

/*
Function called to retrieve file in the list using an index
*/
File* fileAt(QDeclarativeListProperty<File> * property, int index)
{
    return static_cast< QList<File *> *>(property->data)->at(index);
}

/*
Returns the number of files in the list
*/
int filesSize(QDeclarativeListProperty<File> * property) 
{
    return static_cast< QList<File *> *>(property->data)->size();
}

/*
Function called to empty the list property contents
*/
void clearFilesPtr(QDeclarativeListProperty<File> *property)
{
    return static_cast< QList<File *> *>(property->data)->clear();
}

/*
Returns the list of files as a QDeclarativeListProperty.
*/
QDeclarativeListProperty<File> Directory::files()
{
    refresh();
    return QDeclarativeListProperty<File>( this, &m_fileList, &appendFiles, &filesSize, &fileAt,  &clearFilesPtr );
}

/*
Return the name of the currently selected file
*/
QString Directory::filename() const
{
    return currentFile.name();
}

/*
Return the file's content as a string.
*/
QString Directory::fileContent() const
{
    return m_fileContent;
}

/*
Set the file name of the current file
*/
void Directory::setFilename(const QString &str)
{
    if( str != currentFile.name() ) {
        currentFile.setName(str);
        emit filenameChanged();
    }
}

/*
Set the content of the file as a string
*/
void Directory::setFileContent(const QString &str)
{
    if(str != m_fileContent){
        m_fileContent = str;
        emit fileContentChanged();
    }
}

/*
Called from QML to save the file using the filename and file content.
Saving makes sure that the file has a .txt extension.
*/
void Directory::saveFile()
{
    if(currentFile.name().size() == 0){
        qWarning()<< "Empty filename. no save";
        return;
    }
    QString extendedName = currentFile.name();
    if(!currentFile.name().endsWith(".txt")){
        extendedName.append(".txt");
    }
    QFile file( m_dir.filePath(extendedName) );
    if ( file.open(QFile::WriteOnly | QFile::Truncate) ) {
        QTextStream outStream(&file);
        outStream << m_fileContent;
    }
    file.close();
    refresh();
    emit directoryChanged();
}

/*
Load the contents of a file.
Only loads files with a .txt extension
*/
void Directory::loadFile()
{
    m_fileContent.clear();
    QString extendedName = currentFile.name();
    if( !currentFile.name().endsWith(".txt") ) {
        extendedName.append(".txt");
    }

    QFile file( m_dir.filePath(extendedName) );
    if ( file.open(QFile::ReadOnly ) ) {
        QTextStream inStream(&file);

        QString line;
        do {
            line = inStream.read(75);
            m_fileContent.append(line);
        } while ( !line.isNull() ) ;
    }
    file.close();
}

/*
Reloads the content of the files list. This is to ensure that the newly
created files are added onto the list.
*/
void Directory::refresh()
{
    m_dirFiles = m_dir.entryList(m_filterList,QDir::Files,QDir::Name);
    m_fileList.clear();

    File * file;
    for(int i = 0; i < m_dirFiles.size() ; i ++) {
        file = new File();

        if( m_dirFiles.at(i).endsWith(".txt") ) {
            QString name = m_dirFiles.at(i);
            file->setName( name.remove(".txt",Qt::CaseSensitive) );
        }
        else {
            file->setName(m_dirFiles.at(i));
        }
        m_fileList.append(file);
    }
}