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Example now stops and starts service publish and service discovery when

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application is suspended (device sleeps) and becomes active (device wakes).
Important on iOS devices as device sleep kills browser and service
publisher.
This commit is contained in:
Jonathan Bagg
2017-10-09 21:30:17 -04:00
parent 8a9936a4a5
commit c130cb697d
3 changed files with 41 additions and 12 deletions
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example/window.cpp
+28 -9
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@@ -24,6 +24,7 @@
Example app to demonstrate service publishing and service discovery
---------------------------------------------------------------------------------------------------
**************************************************************************************************/
#include <QGuiApplication>
#include <QVBoxLayout>
#include <QPushButton>
#include <QTableWidgetItem>
@@ -54,9 +55,9 @@ mainWindow::mainWindow()
connect(&zeroConf, SIGNAL(serviceAdded(QZeroConfService *)), this, SLOT(addService(QZeroConfService *)));
connect(&zeroConf, SIGNAL(serviceRemoved(QZeroConfService *)), this, SLOT(removeService(QZeroConfService *)));
connect(qGuiApp, SIGNAL(applicationStateChanged(Qt::ApplicationState)), this, SLOT(appStateChanged(Qt::ApplicationState)));
zeroConf.startBrowser("_qtzeroconf_test._tcp");
startPublish();
publishEnabled = 1;
}
void mainWindow::buildGUI()
@@ -68,13 +69,13 @@ void mainWindow::buildGUI()
button->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
layout->addWidget(button);
layout->setAlignment(button, Qt::AlignHCenter);
connect(button, SIGNAL(clicked()), this, SLOT(startPublish()));
connect(button, &QPushButton::clicked, this, &mainWindow::startPublishClicked);
button = new QPushButton(tr(" Disable Publish "));
button->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
layout->addWidget(button);
layout->setAlignment(button, Qt::AlignHCenter);
connect(button, SIGNAL(clicked()), this, SLOT(stopPublish()));
connect(button, &QPushButton::clicked, this, &mainWindow::stopPublishClicked);
table.verticalHeader()->hide();
table.horizontalHeader()->hide();
@@ -102,21 +103,39 @@ QString mainWindow::buildName(void)
return name;
}
void mainWindow::appStateChanged(Qt::ApplicationState state)
{
if (state == Qt::ApplicationSuspended) {
zeroConf.stopServicePublish();
zeroConf.stopBrowser();
}
else if (state == Qt::ApplicationActive) {
if (publishEnabled && !zeroConf.publishExists())
startPublish();
if (!zeroConf.browserExists())
zeroConf.startBrowser("_qtzeroconf_test._tcp");
}
}
// ---------- Service Publish ----------
void mainWindow::startPublish()
{
if (publishEnabled)
return;
publishEnabled = 1;
zeroConf.clearServiceTxtRecords();
zeroConf.addServiceTxtRecord("Qt", "the best!");
zeroConf.addServiceTxtRecord("ZeroConf is nice too");
zeroConf.startServicePublish(buildName().toUtf8(), "_qtzeroconf_test._tcp", "local", 11437);
}
void mainWindow::stopPublish()
void mainWindow::startPublishClicked()
{
if (publishEnabled)
return;
publishEnabled = 1;
startPublish();
}
void mainWindow::stopPublishClicked()
{
if (!publishEnabled)
return;