Adds initial intermediate qt6 porting state

qt6-after/qt6-migrated-legatus/Lts/Plugins/AudioVideoManagement/Shared/avs_app.h

@@ -0,0 +1,66 @@
+
+
+
+#pragma once
+
+#include <Plugins/AudioVideoManagement/Shared/avmshared_export.h>
+#include <QObject>
+#include <QRect>
+#include <boost/optional.hpp>
+
+namespace LtsMultiMonitor
+{
+class FullscreenVideoDummyWidget;
+}
+
+namespace AudioVideoManagement
+{
+
+class AvaControl;
+
+
+
+class AVMSHARED_EXPORT AvsApp : public QObject
+{
+  Q_OBJECT
+
+public:
+  AvsApp(const QString &dialogId, AvaControl *avaControl);
+  ~AvsApp() override;
+
+  void show(const QVector<QWidget *> irreplacableWidgets = {});
+  void show(const QRect &geometry);
+  void hide(bool andClose = false);
+  bool isVisible() const;
+  bool isActive() const; 
+
+  
+
+  void releaseStreams();
+
+signals:
+  void signalVisible();
+  void signalPause();
+  void signalResume();
+
+private slots:
+  void onWidgetPlaced(const QRect &geometry);
+  void onPlacementHelperDestroyed();
+  void onHideVideo();
+  void onShowVideo();
+
+private:
+  void showAvsDialog(const QRect &geometry);
+  void hideAvsDialog();
+  void hideAndPauseAvsDialog();
+  void showAndResumeAvsDialog();
+
+  static const QString               ALL_STREAMS;
+  const QString                      m_dialogId;
+  AvaControl                        *m_avaControl;
+  LtsMultiMonitor::FullscreenVideoDummyWidget   *m_screenPlacementHelper{nullptr};
+  boost::optional<QRect>             m_presetGeometry;
+  bool                               m_visible;
+};
+
+}