fix: 解决协同服务崩溃后设备列表不清空和状态不改变的问题。

添加dbus服务watcher，当后台服务崩溃后，清空设备列表。

Log:
Bug: https://pms.uniontech.com/bug-view-179595.html
Influence: 协同服务崩溃后，设备列表显示及设备状态。
Change-Id: I8464aaac631eb2379475fbfb65eaba3ab063448e

plugins/display/collaborationdevmodel.cpp

@@ -26,6 +26,7 @@
 #include <QDBusArgument>
 #include <QDBusInterface>
 #include <QDBusPendingCall>
+#include <QDBusServiceWatcher>
 
 #include <DGuiApplicationHelper>
 
@@ -56,16 +57,19 @@ CollaborationDevModel::CollaborationDevModel(QObject *parent)
 
     m_colDbusInter->connection().connect(CollaborationService, CollaborationPath, ColPropertiesInterface,
                                          "PropertiesChanged", "sa{sv}as", this, SLOT(onPropertyChanged(QDBusMessage)));
+
+    auto *dbusWatcher = new QDBusServiceWatcher(CollaborationService, m_colDbusInter->connection(),
+                                                QDBusServiceWatcher::WatchForUnregistration, this);
+    connect(dbusWatcher, &QDBusServiceWatcher::serviceUnregistered, this, [this](){
+        qWarning() << CollaborationService << "unregistered";
+        clear();
+    });
 }
 
 void CollaborationDevModel::checkServiceValid()
 {
     if (!m_colDbusInter->isValid()) {
-        for (CollaborationDevice *device : m_devices) {
+        clear();
-            device->deleteLater();
-        }
-        m_devices.clear();
-        Q_EMIT devicesChanged();
     }
 }
 
@@ -126,6 +130,16 @@ void CollaborationDevModel::updateDevice(const QStringList &devPaths)
     emit devicesChanged();
 }
 
+void CollaborationDevModel::clear()
+{
+    for (CollaborationDevice *device : m_devices) {
+        device->deleteLater();
+    }
+    m_devices.clear();
+
+    Q_EMIT devicesChanged();
+}
+
 CollaborationDevice *CollaborationDevModel::getDevice(const QString &machinePath)
 {
     return m_devices.value(machinePath, nullptr);

plugins/display/collaborationdevmodel.h

@@ -53,6 +53,7 @@ private slots:
 
 private:
     void updateDevice(const QStringList &devPaths);
+    void clear();
 
 private:
     QDBusInterface *m_colDbusInter;