window.cpp Example File

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 #include <QtWidgets>
 #include "filelistmodel.h"
 #include "window.h"

 Window::Window(QWidget *parent)
     : QWidget(parent)
 {
     FileListModel *model = new FileListModel(this);
     model->setDirPath(QLibraryInfo::location(QLibraryInfo::PrefixPath));

     QLabel *label = new QLabel(tr("&Directory:"));
     QLineEdit *lineEdit = new QLineEdit;
     label->setBuddy(lineEdit);

     QListView *view = new QListView;
     view->setModel(model);

     logViewer = new QTextBrowser;
     logViewer->setSizePolicy(QSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred));

     connect(lineEdit, SIGNAL(textChanged(QString)),
             model, SLOT(setDirPath(QString)));
     connect(lineEdit, SIGNAL(textChanged(QString)),
             logViewer, SLOT(clear()));
     connect(model, SIGNAL(numberPopulated(int)),
             this, SLOT(updateLog(int)));

     QGridLayout *layout = new QGridLayout;
     layout->addWidget(label, 0, 0);
     layout->addWidget(lineEdit, 0, 1);
     layout->addWidget(view, 1, 0, 1, 2);
     layout->addWidget(logViewer, 2, 0, 1, 2);

     setLayout(layout);
     setWindowTitle(tr("Fetch More Example"));
 }

 void Window::updateLog(int number)
 {
     logViewer->append(tr("%1 items added.").arg(number));
 }