stationdialog.cpp Example File

 /****************************************************************************
 **
 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** You may use this file under the terms of the BSD license as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
 **     the names of its contributors may be used to endorse or promote
 **     products derived from this software without specific prior written
 **     permission.
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #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());
 }