stationdialog.cpp Example File

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 #include "stationdialog.h"
 #include "ui_stationdialog.h"

 #include <QtCore/QAbstractListModel>

 class StationModel : public QAbstractListModel
 {
     public:
         enum Role
         {
             StationIdRole = Qt::UserRole + 1,
             StationNameRole
         };

         StationModel(QObject *parent = 0)
             : QAbstractListModel(parent)
         {
         }

         void setStations(const StationInformation::List &list)
         {
             m_stations = list;
             layoutChanged();
         }

         virtual int rowCount(const QModelIndex &parent = QModelIndex()) const
         {
             if (!parent.isValid())
                 return m_stations.count();
             else
                 return 0;
         }

         virtual int columnCount(const QModelIndex &parent = QModelIndex()) const
         {
             if (!parent.isValid())
                 return 1;
             else
                 return 0;
         }

         virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const
         {
             if (!index.isValid())
                 return QVariant();

             if (index.column() > 1 || index.row() >= m_stations.count())
                 return QVariant();

             const StationInformation info = m_stations.at(index.row());
             if (role == Qt::DisplayRole || role == StationNameRole)
                 return info.name();
             else if (role == StationIdRole)
                 return info.id();

             return QVariant();
         }

     private:
         StationInformation::List m_stations;
 };

 StationDialog::StationDialog(const QString &name, const QStringList &lineNumbers, QWidget *parent)
     : QDialog(parent)
 {
     m_ui.setupUi(this);

     connect(m_ui.m_searchButton, SIGNAL(clicked()), this, SLOT(searchStations()));

     m_ui.m_searchButton->setDefault(true);
     m_ui.m_input->setText(name);

     m_model = new StationModel(this);
     m_ui.m_view->setModel(m_model);

     for (int i = 0; i < lineNumbers.count(); ++i) {
         if (i == 0)
             m_ui.m_line1->setText(lineNumbers.at(i));
         else if (i == 1)
             m_ui.m_line2->setText(lineNumbers.at(i));
         else if (i == 2)
             m_ui.m_line3->setText(lineNumbers.at(i));
         else if (i == 3)
             m_ui.m_line4->setText(lineNumbers.at(i));
     }

     QMetaObject::invokeMethod(this, SLOT(searchStations()), Qt::QueuedConnection);
 }

 StationInformation StationDialog::selectedStation() const
 {
     const QModelIndex index = m_ui.m_view->currentIndex();

     if (!index.isValid())
         return StationInformation();

     return StationInformation(index.data(StationModel::StationIdRole).toString(),
                               index.data(StationModel::StationNameRole).toString());
 }

 QStringList StationDialog::lineNumbers() const
 {
     QStringList lines;

     if (!m_ui.m_line1->text().simplified().isEmpty())
         lines.append(m_ui.m_line1->text().simplified());
     if (!m_ui.m_line2->text().simplified().isEmpty())
         lines.append(m_ui.m_line2->text().simplified());
     if (!m_ui.m_line3->text().simplified().isEmpty())
         lines.append(m_ui.m_line3->text().simplified());
     if (!m_ui.m_line4->text().simplified().isEmpty())
         lines.append(m_ui.m_line4->text().simplified());

     return lines;
 }

 void StationDialog::searchStations()
 {
     m_model->setStations(StationQuery::query(m_ui.m_input->text()));
     m_ui.m_view->keyboardSearch(m_ui.m_input->text());
 }