informationwindow.cpp

来自「奇趣公司比较新的qt/emd版本」· C++ 代码 · 共 145 行

/****************************************************************************
**
** Copyright (C) 2006-2007 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
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** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
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** review the following information:
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** or contact the sales department at [e-mail].
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** additional rights. These rights are described in the Trolltech GPL
** Exception version 1.0, which can be found at
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** GPL_EXCEPTION.txt in this package.
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** In addition, as a special exception, Trolltech, as the sole copyright
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** plug-in the right for the Qt/Eclipse Integration to link to
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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);
    mapper->addMapping(countryText, 3);
    mapper->addMapping(descriptionEditor, 4);
    mapper->setCurrentIndex(id);

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

    QGridLayout *layout = new QGridLayout;
    layout->addWidget(locationLabel, 0, 0, Qt::AlignLeft | Qt::AlignTop);
    layout->addWidget(countryLabel, 1, 0, Qt::AlignLeft | Qt::AlignTop);
    layout->addWidget(imageFileLabel, 2, 0, Qt::AlignLeft | Qt::AlignTop);
    layout->addWidget(descriptionLabel, 3, 0, Qt::AlignLeft | Qt::AlignTop);
    layout->addWidget(locationText, 0, 1);
    layout->addWidget(countryText, 1, 1);
    layout->addWidget(imageFileEditor, 2, 1);
    layout->addWidget(descriptionEditor, 3, 1);
    layout->addWidget(buttonBox, 4, 0, 1, 2);
    setLayout(layout);

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

    setWindowFlags(Qt::Window);
    enableButtons(false);
    setWindowTitle(tr("Trolltech Office: %1").arg(locationText->text()));
    resize(320, sizeHint().height());
}

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

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