fixed:tray error

托盘加载插件时，插件对应的dbus服务有时候还没启动，这时会绑定一个QDBusConnectionInterface::serviceOwnerChanged，当事件触发时，调用插件的init方法。托盘里每次init都会重新创建所有widget，导致托盘内的插件图标全部消失。

plugins/tray/trayplugin.cpp

@@ -43,6 +43,7 @@ using org::kde::StatusNotifierWatcher;
 
 TrayPlugin::TrayPlugin(QObject *parent)
     : QObject(parent)
+    , m_pluginLoaded(false)
 {
 }
 
@@ -68,6 +69,12 @@ void TrayPlugin::init(PluginProxyInterface *proxyInter)
         return;
     }
 
+    if (m_pluginLoaded) {
+        return;
+    }
+
+    m_pluginLoaded = true;
+
     m_trayInter = new DBusTrayManager(this);
     m_sniWatcher = new StatusNotifierWatcher(SNI_WATCHER_SERVICE, SNI_WATCHER_PATH, QDBusConnection::sessionBus(), this);
     m_fashionItem = new FashionTrayItem(this);

plugins/tray/trayplugin.h

@@ -99,6 +99,7 @@ private:
     QMap<QString, IndicatorTray*> m_indicatorMap;
 
     TipsWidget *m_tipsLabel;
+    bool m_pluginLoaded;
 };
 
 #endif // TRAYPLUGIN_H