QtPdCom::VariableWatcher Class Reference

Convenience class for processing the result of Process::findQt() More...

#include <FutureWatchers.h>

Inheritance diagram for QtPdCom::VariableWatcher:

Collaboration diagram for QtPdCom::VariableWatcher:

Detailed Description

Convenience class for processing the result of Process::findQt()

Let's say you have a Widget which needs to process a PdCom::Variable instance.

class MyWidget : public QObject
{
    Q_OBJECT

  public:
    MyWidget(QObject *parent) : QObject(parent) {}

    void setVariable(QtPdCom::Process& proc, QString path)
    {
        const auto watcher = new QtPdCom::VariableWatcher(this);
        // this will be fired when the result has arrived
        connect(watcher, &QtPdCom::VariableWatcher::finished,
                this, &MyWidget::onVariableFound);
        // delete watcher if Process is resetted in the meantime
        connect(watcher, &QtPdCom::VarableWatcher::cancelled,
                watcher, &QObject::deleteLater);
        // start watching
        watcher->setFuture(proc.find(path));
    }

  private slots:
    void onVariableFound()
    {
        const auto watcher =
qobject_cast<QtPdCom::FindVariableWatcher*>(QObject::sender()); if
(!watcher) return;
        // fetch result from watcher
        const PdCom::Variable result = watcher->result();
        watcher->deleteLater();
        // handle result
    }
};

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The documentation for this class was generated from the following file:

• QtPdCom1/FutureWatchers.h