[AudioSystem] Allow audio engines to provide widgets for modifying connection properties. (#6303)

Signed-off-by: Maxim Ivanov <imginimg@gmail.com>

Gems/AudioSystem/Code/Include/Editor/IAudioSystemEditor.h

@@ -16,6 +16,8 @@
 
 #include <ACETypes.h>
 
+class QWidget;
+
 namespace AudioControls
 {
     class IAudioSystemEditor;
@@ -150,6 +152,12 @@ namespace AudioControls
 
         //! Informs the plugin that the ACE has saved the data in case it needs to do any clean up.
         virtual void DataSaved() = 0;
+
+        //! Creates a widget for modifying connection properties.
+        //! The widget must have a "PropertiesChanged()" signal.
+        //! The widget ownership transferred to the caller.
+        virtual QWidget* CreateConnectionPropertiesWidget([[maybe_unused]] const TConnectionPtr connection,
+            [[maybe_unused]] EACEControlType atlControlType) { return nullptr; }
     };
 
 } // namespace AudioControls

Gems/AudioSystem/Code/Source/Editor/ConnectionsWidget.ui

@@ -16,18 +16,6 @@
     <verstretch>0</verstretch>
    </sizepolicy>
   </property>
-  <property name="minimumSize">
-   <size>
-    <width>0</width>
-    <height>450</height>
-   </size>
-  </property>
-  <property name="maximumSize">
-   <size>
-    <width>16777215</width>
-    <height>450</height>
-   </size>
-  </property>
   <property name="windowTitle">
    <string>Inspector Panel</string>
   </property>
@@ -104,7 +92,7 @@
      <property name="frameShadow">
       <enum>QFrame::Plain</enum>
      </property>
-     <layout class="QVBoxLayout" name="verticalLayout">
+     <layout class="QVBoxLayout" name="m_connectionPropertiesLayout">
       <property name="spacing">
        <number>0</number>
       </property>

Gems/AudioSystem/Code/Source/Editor/QConnectionsWidget.cpp

@@ -37,6 +37,7 @@ namespace AudioControls
         m_connectionList->installEventFilter(this);
 
         connect(m_connectionList, SIGNAL(customContextMenuRequested(const QPoint&)), SLOT(ShowConnectionContextMenu(const QPoint&)));
+        connect(m_connectionList, SIGNAL(itemSelectionChanged()), this, SLOT(SelectedConnectionChanged()));
     }
 
     //-------------------------------------------------------------------------------------------//
@@ -100,6 +101,57 @@ namespace AudioControls
         contextMenu.exec(m_connectionList->mapToGlobal(pos));
     }
 
+     //-------------------------------------------------------------------------------------------//
+    void QConnectionsWidget::SelectedConnectionChanged()
+    {
+        TConnectionPtr connection;
+        EACEControlType controlType = AudioControls::eACET_NUM_TYPES;
+        if (m_control)
+        {
+            QList<QListWidgetItem*> selected = m_connectionList->selectedItems();
+            if (selected.length() == 1)
+            {
+                QListWidgetItem* currentItem = selected[0];
+                if (currentItem)
+                {
+                    const CID externalId = currentItem->data(eMDR_ID).toInt();
+                    connection = m_control->GetConnection(externalId);
+                    controlType = m_control->GetType();
+                }
+            }
+        }
+
+        if (m_connectionPropertiesWidget)
+        {
+            delete m_connectionPropertiesWidget;
+            m_connectionPropertiesWidget = nullptr;
+        }
+
+        if (connection && connection->HasProperties())
+        {
+            if (IAudioSystemEditor* audioSystemImpl = CAudioControlsEditorPlugin::GetAudioSystemEditorImpl())
+            {
+                m_connectionPropertiesWidget = audioSystemImpl->CreateConnectionPropertiesWidget(connection, controlType);
+                if (m_connectionPropertiesWidget)
+                {
+                    m_connectionPropertiesWidget->setParent(m_connectionPropertiesFrame);
+                    m_connectionPropertiesLayout->addWidget(m_connectionPropertiesWidget);
+
+                    bool widgetHasChangedSignal = m_connectionPropertiesWidget->metaObject()->indexOfSignal("PropertiesChanged()") != -1;
+                    AZ_Error(
+                        "Audio", widgetHasChangedSignal,
+                        "The widget created by IAudioSystemEditor::CreateConnectionPropertiesWidget() must have a \"PropertiesChanged()\" "
+                        "signal.");
+
+                    if (widgetHasChangedSignal)
+                    {
+                        connect(m_connectionPropertiesWidget, SIGNAL(PropertiesChanged()), this, SLOT(CurrentConnectionModified()));
+                    }
+                }
+            }
+        }
+    }
+
     //-------------------------------------------------------------------------------------------//
     void QConnectionsWidget::MakeConnectionTo(IAudioSystemControl* middlewareControl)
     {

Gems/AudioSystem/Code/Source/Editor/QConnectionsWidget.h

@@ -40,6 +40,7 @@ namespace AudioControls
         void ShowConnectionContextMenu(const QPoint& pos);
         void CurrentConnectionModified();
         void RemoveSelectedConnection();
+        void SelectedConnectionChanged();
 
     private:
         bool eventFilter(QObject* object, QEvent* event) override;
@@ -50,6 +51,8 @@ namespace AudioControls
         CATLControl* m_control;
         QColor m_notFoundColor;
         QColor m_localizedColor;
+
+        QWidget* m_connectionPropertiesWidget = nullptr;
     };
 
 } // namespace AudioControls