Publish and Subscribe Example
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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 "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); } } }