Qt 4.8: informationwindow.cpp Example File (sql/drilldown/informationwindow.cpp)

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# informationwindow.cpp Example File

sql/drilldown/informationwindow.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** 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 Digia Plc 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.
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     **
     ** 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,
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     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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     ****************************************************************************/

     #include "informationwindow.h"

     InformationWindow::InformationWindow(int id, QSqlRelationalTableModel *offices,
                                          QWidget *parent)
         : QDialog(parent)
     {
         QLabel *locationLabel = new QLabel(tr("Location: "));
         QLabel *countryLabel = new QLabel(tr("Country: "));
         QLabel *descriptionLabel = new QLabel(tr("Description: "));
         QLabel *imageFileLabel = new QLabel(tr("Image file: "));

         createButtons();

         locationText = new QLabel;
         countryText = new QLabel;
         descriptionEditor = new QTextEdit;

         imageFileEditor = new QComboBox;
         imageFileEditor->setModel(offices->relationModel(1));
         imageFileEditor->setModelColumn(offices->relationModel(1)->fieldIndex("file"));

         mapper = new QDataWidgetMapper(this);
         mapper->setModel(offices);
         mapper->setSubmitPolicy(QDataWidgetMapper::ManualSubmit);
         mapper->setItemDelegate(new QSqlRelationalDelegate(mapper));
         mapper->addMapping(imageFileEditor, 1);
         mapper->addMapping(locationText, 2, "text");
         mapper->addMapping(countryText, 3, "text");
         mapper->addMapping(descriptionEditor, 4);
         mapper->setCurrentIndex(id);

         connect(descriptionEditor, SIGNAL(textChanged()),
                 this, SLOT(enableButtons()));
         connect(imageFileEditor, SIGNAL(currentIndexChanged(int)),
                 this, SLOT(enableButtons()));

         QFormLayout *formLayout = new QFormLayout;
         formLayout->addRow(locationLabel, locationText);
         formLayout->addRow(countryLabel, countryText);
         formLayout->addRow(imageFileLabel, imageFileEditor);
         formLayout->addRow(descriptionLabel, descriptionEditor);

         QVBoxLayout *layout = new QVBoxLayout;
         layout->addLayout(formLayout);
         layout->addWidget(buttonBox);
         setLayout(layout);

         locationId = id;
         displayedImage = imageFileEditor->currentText();

         // Commented the following line. Now the window will look like dialog and the Qt will place the QDialogBox buttons to menu area in Symbian.
         // Too bad that the revert button is missing, Should the Qt place the buttons under Option menu in the menu area?!
         // If the Qt::Window flag was used, the background of window is white in symbian and the QLabels can't be regognized from the background.

         //setWindowFlags(Qt::Window);
         enableButtons(false);
         setWindowTitle(tr("Office: %1").arg(locationText->text()));
     }

     int InformationWindow::id()
     {
         return locationId;
     }

     void InformationWindow::revert()
     {
         mapper->revert();
         enableButtons(false);
     }

     void InformationWindow::submit()
     {
         QString newImage(imageFileEditor->currentText());

         if (displayedImage != newImage) {
             displayedImage = newImage;
             emit imageChanged(locationId, newImage);
         }

         mapper->submit();
         mapper->setCurrentIndex(locationId);

         enableButtons(false);
     }

     void InformationWindow::createButtons()
     {
         closeButton = new QPushButton(tr("&Close"));
         revertButton = new QPushButton(tr("&Revert"));
         submitButton = new QPushButton(tr("&Submit"));

         closeButton->setDefault(true);

         connect(closeButton, SIGNAL(clicked()), this, SLOT(close()));
         connect(revertButton, SIGNAL(clicked()), this, SLOT(revert()));
         connect(submitButton, SIGNAL(clicked()), this, SLOT(submit()));

         buttonBox = new QDialogButtonBox(this);
         buttonBox->addButton(submitButton, QDialogButtonBox::AcceptRole);
         buttonBox->addButton(revertButton, QDialogButtonBox::ResetRole);
         buttonBox->addButton(closeButton, QDialogButtonBox::RejectRole);
     }

     void InformationWindow::enableButtons(bool enable)
     {
         revertButton->setEnabled(enable);
         submitButton->setEnabled(enable);
     }