subscriberdialog.cpp Example File
publish-subscribe/subscriberdialog.cpp

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    ** This file is part of the Qt Mobility Components.
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    #include "subscriberdialog.h"
    #if defined(Q_WS_MAEMO_5) || defined(Q_WS_MAEMO_6)
    #include "ui_subscriberdialog_hor.h"
    #else
    #include "ui_subscriberdialog.h"
    #endif

    #include <qvaluespacesubscriber.h>

    #include <QTableWidget>
    #include <QListWidget>
    #include <QDesktopWidget>

    #ifdef QTM_EXAMPLES_SMALL_SCREEN
    #include <QPushButton>
    #include <QSizePolicy>
    #endif

    #include <QDebug>

    SubscriberDialog::SubscriberDialog(QWidget *parent) :
            QDialog(parent),
            ui(new Ui::SubscriberDialog),
            subscriber(0),
            tableWidget(0), listWidget(0)
    {
        ui->setupUi(this);

    #ifdef QTM_EXAMPLES_SMALL_SCREEN
        QPushButton *switchButton =
            ui->buttonBox->addButton(tr("Switch"), QDialogButtonBox::ActionRole);
        connect(switchButton, SIGNAL(clicked()), this, SIGNAL(switchRequested()));
    #endif

    #if defined(Q_WS_MAEMO_5) || defined(Q_WS_MAEMO_6)
        tableWidget = ui->tableWidget;
        QStringList headerLabels;
        headerLabels << tr("Key") << tr("Value") << tr("Type");
        tableWidget->setColumnCount(3);
        tableWidget->setHorizontalHeaderLabels(headerLabels);
        tableWidget->horizontalHeader()->setStretchLastSection(true);
        tableWidget->verticalHeader()->setVisible(false);
        tableWidget->setColumnWidth(0, 200);
        tableWidget->setColumnWidth(1, 400);
    #else
        QDesktopWidget desktopWidget;
        if (desktopWidget.availableGeometry().width() < 400) {
            // Screen is too small to fit a table widget without scrolling, use a list widget instead.
            listWidget = new QListWidget;
            listWidget->setAlternatingRowColors(true);
            ui->verticalLayout->insertWidget(2, listWidget);
        } else {
            tableWidget = new QTableWidget;
            QStringList headerLabels;
            headerLabels << tr("Key") << tr("Value") << tr("Type");
            tableWidget->setColumnCount(3);
            tableWidget->setHorizontalHeaderLabels(headerLabels);
            tableWidget->horizontalHeader()->setStretchLastSection(true);
            tableWidget->verticalHeader()->setVisible(false);

            ui->verticalLayout->insertWidget(2, tableWidget);
        }
    #endif
        connect(ui->connectButton, SIGNAL(clicked()), this, SLOT(changeSubscriberPath()));
        changeSubscriberPath();

        // if the default path does not exist reset it to /
        QVariant value = subscriber->value();
        if (!subscriber->value().isValid() && subscriber->subPaths().isEmpty()) {
            ui->basePath->setText(QLatin1String("/"));
            changeSubscriberPath();
        }
    }

    SubscriberDialog::~SubscriberDialog()
    {
        delete ui;
    }

    void SubscriberDialog::changeEvent(QEvent *e)
    {
        QDialog::changeEvent(e);
        switch (e->type()) {
        case QEvent::LanguageChange:
            ui->retranslateUi(this);
            break;
        default:
            break;
        }
    }

    void SubscriberDialog::changeSubscriberPath()
    {
        if (listWidget)
            listWidget->clear();
        else if (tableWidget)
            tableWidget->clearContents();

        if (!subscriber)
            subscriber = new QValueSpaceSubscriber(ui->basePath->text(), this);
        else
            subscriber->setPath(ui->basePath->text());

        connect(subscriber, SIGNAL(contentsChanged()), this, SLOT(subscriberChanged()));

        subscriberChanged();
    }

    void SubscriberDialog::subscriberChanged()
    {
        QStringList subPaths = subscriber->subPaths();

        if (listWidget) {
            listWidget->clear();
        } else if (tableWidget) {
            tableWidget->clearContents();
            tableWidget->setRowCount(subPaths.count());
        }

        for (int i = 0; i < subPaths.count(); ++i) {
            QVariant v = subscriber->value(subPaths.at(i));

            if (listWidget) {
                const QString itemTemplate("%1 (%2)\n%3");

                QListWidgetItem *item =
                    new QListWidgetItem(itemTemplate.arg(subPaths.at(i), v.typeName(), v.toString()));
                item->setFlags(item->flags() & ~Qt::ItemIsEditable);
                listWidget->addItem(item);
            } else if (tableWidget) {
                QTableWidgetItem *pathItem = new QTableWidgetItem(subPaths.at(i));
                pathItem->setFlags(pathItem->flags() & ~Qt::ItemIsEditable);
                QTableWidgetItem *valueItem = new QTableWidgetItem(v.toString());
                valueItem->setFlags(valueItem->flags() & ~Qt::ItemIsEditable);
                QTableWidgetItem *typeItem = new QTableWidgetItem(v.typeName());
                typeItem->setFlags(typeItem->flags() & ~Qt::ItemIsEditable);

                tableWidget->setItem(i, 0, pathItem);
                tableWidget->setItem(i, 1, valueItem);
                tableWidget->setItem(i, 2, typeItem);
            }
        }
    }