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  1. 17th July 2006, 06:31 #1
    jp
    jp is offline Beginner
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    Default File browser

    I am using Qt4.1.4 under WinXp
    I made a little File browser for didactical reasons and to override certain extensions Windows Explorer runs by default.
    Everything works to the extent that I navigate directories and drives and launch programs the way I want but so far all attempts to incorporate a given typed content of LineEdit to the File browser have eluded me.
    Could anyone be so kind to illuminate me with some pointers?

    Qt Code: 
    1. #include <QtGui>
    2.  
    3. //#include <QDebug>
    4.  
    5. class CListBox: public QListWidget {
    6.    Q_OBJECT 
    7. public:
    8.    CListBox(QWidget *pParent);
    9. signals:
    10.    void currentDir(const QString&);  
    11. protected slots:
    12.    void onActivation(QListWidgetItem *item);
    13. };
    14.  
    15. CListBox::CListBox(QWidget *pParent): QListWidget(pParent) {
    16.  clear();
    17.  QDir dir;
    18.  QStringList list; 
    19.  QStringList arg = QCoreApplication::arguments();
    20.  if (arg.size() == 2) dir.setCurrent(arg.at(1)); 
    21.  dir.setFilter(QDir::AllEntries | QDir::Hidden | QDir::System);
    22.  dir.setSorting(QDir::DirsFirst | QDir::IgnoreCase | QDir::Name);
    23.  list = dir.entryList(); 
    24.  for (int i = 0; i < list.size(); ++i) {
    25.      insertItem(i, list.at(i));
    26.  }  
    27.  dir = dir.canonicalPath();
    28.  if (dir.isRoot()) {
    29.      //QFileInfoList roots = QDir::drives();
    30.      QList<QFileInfo> roots = QDir::drives();
    31.      QString string = QDir::currentPath();    
    32.      string.truncate(3);
    33.      int n = 0;
    34.      for (int i = 0; i < roots.size(); ++i) {              
    35.      QFileInfo info = roots.at(i);              
    36.      if (info.absoluteFilePath() != string) {                  
    37.          insertItem(n, info.absoluteFilePath());                
    38.          ++n;
    39.       }     
    40.    }  
    41.  } else takeItem(0); 
    42.  connect(this, SIGNAL(itemActivated(QListWidgetItem*)), this, SLOT(onActivation(QListWidgetItem*))); 
    43. };
    44.  
    45. void CListBox::onActivation(QListWidgetItem *item) {
    46.   QDir dir;
    47.   int flag = 0;
    48.   QStringList list;   
    49.   QString str = item->text();
    50.   QFileInfo fiche(str);
    51.   QString ext = fiche.suffix().toLower();
    52.   QStringList ext1, ext2;
    53.   ext1 << "" << "txt" << "bak" <<"bat" <<"ini" <<"log" << "dat" << "sys";
    54.   ext2 <<"h"<<"cpp"<<"pro"<<"lsp"<<"frm"<<"java"<<"vb"<<"bas"<<"js"<<"awk"<<"xul";  
    55.   if (fiche.isDir()) {              
    56.     clear();
    57.     dir.setCurrent(str);    
    58.     emit currentDir(dir.currentPath());  
    59.     dir.setFilter(QDir::AllEntries | QDir::Hidden | QDir::System);
    60.     dir.setSorting(QDir::DirsFirst | QDir::IgnoreCase | QDir::Name);
    61.     list = dir.entryList();     
    62.     for (int i = 0; i < list.size(); ++i) {
    63.       insertItem(i, list.at(i));
    64.     }                     
    65.     dir = dir.canonicalPath();
    66.     if (dir.isRoot()) { 
    67.            clear();           
    68.            dir.setFilter(QDir::AllEntries | QDir::Hidden | QDir::System);
    69.            dir.setSorting(QDir::DirsFirst | QDir::IgnoreCase| QDir::Name);
    70.            list = dir.entryList();                
    71.            for (int i = 0; i < list.size(); ++i) {
    72.               insertItem(i, list.at(i));
    73.            }  
    74.            //QFileInfoList roots = QDir::drives();
    75.            QList<QFileInfo> roots = QDir::drives();
    76.            QString string = QDir::currentPath();    
    77.            string.truncate(3);
    78.            int n = 0;
    79.            for (int i = 0; i < roots.size(); ++i) {              
    80.               QFileInfo info = roots.at(i);              
    81.               if (info.absoluteFilePath() != string) {                  
    82.                    insertItem(n, info.absoluteFilePath());                
    83.                    ++n;
    84.               }     
    85.            }  
    86.        } else takeItem(0);
    87.     } else {
    88.        emit currentDir(dir.currentPath()); 
    89.        QString cmd = "c:/dos/ed /p ";
    90.        if (ext1.contains(ext)) flag = 1;
    91.        if (ext2.contains(ext)) flag = 2;       
    92.        switch(flag) {
    93.          case 1: QProcess::startDetached(cmd.append(str)); break;
    94.          case 2: QProcess::startDetached("led", QStringList() << str); break;         
    95.         default: QProcess::startDetached("start", QStringList() << str);
    96.       }
    97.     }                     
    98. };
    99.  
    100. // --------------------
    101.  
    102. class CLineEdit: public QLineEdit {
    103.   Q_OBJECT
    104. public:
    105.   CLineEdit(QWidget *pParent);
    106. signals:
    107.    void setDir(const QString&);  
    108. protected slots:
    109.   void onReturnPressed();
    110. };
    111.  
    112. CLineEdit::CLineEdit(QWidget *pParent): QLineEdit(pParent) {   
    113.  setText(QDir::currentPath());  
    114.  connect( this, SIGNAL(returnPressed()), this, SLOT(onReturnPressed()));
    115. };
    116.  
    117. void CLineEdit::onReturnPressed() {
    118.   QDir dir;
    119.   QString string = displayText();
    120.   dir.setCurrent(string);   
    121.   emit setDir(dir.currentPath()); 
    122.   //qDebug() << QDir::currentPath();       
    123. };
    124.  
    125. // --------------------
    126.  
    127. int main(int argc, char *argv[]) { 
    128.  QApplication app(argc, argv);
    129.  QFrame wnd;
    130.  QVBoxLayout layout(&wnd);
    131.  CListBox lbox(&wnd);
    132.  CLineEdit ledit(&wnd);
    133.  layout.addWidget(&lbox,  Qt::AlignHCenter | Qt::AlignVCenter);
    134.  layout.addWidget(&ledit, Qt::AlignHCenter | Qt::AlignVCenter);
    135.  wnd.setWindowTitle("File browser");
    136.  wnd.show();
    137.  lbox.setFocus();
    138.  
    139.  QPalette p1 = lbox.palette();
    140.  p1.setColor(QPalette::Base, QColor(255, 248, 220)); 
    141.  lbox.setPalette(p1);  
    142.  QPalette p2 = ledit.palette();
    143.  p2.setColor(QPalette::Base, QColor(255, 248, 220)); 
    144.  ledit.setPalette(p2);  
    145.  
    146.  QObject::connect(&lbox, SIGNAL(currentDir(const QString&)), &ledit, SLOT(setText(const QString&)));
    147.  QObject::connect(&ledit, SIGNAL(setDir(const QString&)), &lbox, SLOT(update()));
    148.  
    149.  return app.exec();
    150. }
    151.  
    152. #include "main.moc"
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    All codes packed together as a single file to make it synoptic!
    Last edited by wysota; 17th July 2006 at 09:33. Reason: Added [code] tags
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