subscriberdialog.cpp Example File

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 #include "subscriberdialog.h"
 #include "ui_subscriberdialog.h"

 #include <qpublishsubscribeglobal.h>
 #include <qvaluespacesubscriber.h>

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

 #include <QPushButton>
 #include <QSizePolicy>

 #include <QDebug>

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

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

     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);
     }
     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(QStringLiteral("/"));
         changeSubscriberPath();
     }
 }

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

 void SubscriberDialog::changeEvent(QEvent *e)
 {
     QMainWindow::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(QStringLiteral("%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);
         }
     }
 }