Remove ResourceSelectorHost and clean up/refactor related bits (#3050)

* Sever dependency on legacy resource selector host

Audio resource selectors (browse dialogs) no longer need to be
registered with the legacy IResourceSelectorHost system.  Set up a new
EBus specifically to handle browse button presses and directly invokes
the dialog.

Signed-off-by: amzn-phist <52085794+amzn-phist@users.noreply.github.com>

* Hook up legacy audio control selector to new EBus

Remaining use of legacy audio selectors (trackview) need to be able to
bypass ResourceSelectorHost now.

Signed-off-by: amzn-phist <52085794+amzn-phist@users.noreply.github.com>

* Removes ResourceSelectorHost and legacy selectors

This removes various Variable types that were tied to resource
selectors, such as GeomCache, Model, Animation, File.  Removes the
ResourceSelectorHost completely.  The two things that still appeared to
have selectors in TrackView are Audio Controls and Texture.  Fixed the
audio control selector to work via EBus and the Texture selector didn't
seem to work at all, but left it in as it was.

Signed-off-by: amzn-phist <52085794+amzn-phist@users.noreply.github.com>

* Make the default audio selector return old value

Signed-off-by: amzn-phist <52085794+amzn-phist@users.noreply.github.com>

* Fix some signed/unsigned comparison warnings

Signed-off-by: amzn-phist <52085794+amzn-phist@users.noreply.github.com>

* Remove deleted function from Editor Mock

Signed-off-by: amzn-phist <52085794+amzn-phist@users.noreply.github.com>

* Change audio selector api to use string_view

Per feedback.

Signed-off-by: amzn-phist <52085794+amzn-phist@users.noreply.github.com>

Code/Framework/AzToolsFramework/AzToolsFramework/API/ToolsApplicationAPI.h

@@ -841,9 +841,6 @@ namespace AzToolsFramework
          */
         virtual AZStd::string GetComponentIconPath(const AZ::Uuid& /*componentType*/, AZ::Crc32 /*componentIconAttrib*/, AZ::Component* /*component*/) { return AZStd::string(); }
 
-        /// Resource Selector hook, returns a path for a resource.
-        virtual AZStd::string SelectResource(const AZStd::string& /*resourceType*/, const AZStd::string& /*previousValue*/) { return AZStd::string(); }
-
         /**
          * Calculate the navigation 2D radius in units of an agent given its Navigation Type Name
          * @param angentTypeName         the name that identifies the agent navigation type

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/PropertyAudioCtrl.cpp

@@ -7,8 +7,8 @@
  */
 
 
-#include "PropertyAudioCtrl.h"
-#include "PropertyQTConstants.h"
+#include <UI/PropertyEditor/PropertyAudioCtrl.h>
+#include <UI/PropertyEditor/PropertyQTConstants.h>
 
 #include <QtWidgets/QLabel>
 #include <QtWidgets/QLineEdit>
@@ -34,7 +34,7 @@ namespace AzToolsFramework
         : QWidget(parent)
         , m_browseEdit(nullptr)
         , m_mainLayout(nullptr)
-        , m_propertyType(AudioPropertyType::Invalid)
+        , m_propertyType(AudioPropertyType::NumTypes)
     {
         // create the gui
         m_mainLayout = new QHBoxLayout();
@@ -96,7 +96,7 @@ namespace AzToolsFramework
             return;
         }
 
-        if (type != AudioPropertyType::Invalid)
+        if (type != AudioPropertyType::NumTypes)
         {
             m_propertyType = type;
         }
@@ -136,10 +136,11 @@ namespace AzToolsFramework
 
     void AudioControlSelectorWidget::OnOpenAudioControlSelector()
     {
-        AZStd::string resourceResult;
-        AZStd::string resourceType(GetResourceSelectorNameFromType(m_propertyType));
         AZStd::string currentValue(m_controlName.toStdString().c_str());
-        EditorRequests::Bus::BroadcastResult(resourceResult, &EditorRequests::Bus::Events::SelectResource, resourceType, currentValue);
+        AZStd::string resourceResult;
+        AudioControlSelectorRequestBus::EventResult(
+            resourceResult, m_propertyType,
+            &AudioControlSelectorRequestBus::Events::SelectResource, currentValue);
         SetControlName(QString(resourceResult.c_str()));
     }
 
@@ -167,12 +168,12 @@ namespace AzToolsFramework
         {
         case AudioPropertyType::Trigger:
             return { "AudioTrigger" };
+        case AudioPropertyType::Rtpc:
+            return { "AudioRTPC" };
         case AudioPropertyType::Switch:
             return { "AudioSwitch" };
         case AudioPropertyType::SwitchState:
             return { "AudioSwitchState" };
-        case AudioPropertyType::Rtpc:
-            return { "AudioRTPC" };
         case AudioPropertyType::Environment:
             return { "AudioEnvironment" };
         case AudioPropertyType::Preload:

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/PropertyAudioCtrl.h

@@ -29,6 +29,27 @@ class QMimeData;
 
 namespace AzToolsFramework
 {
+    //=============================================================================
+    // Audio Control Selector Request Bus
+    // For connecting UI proper
+    //=============================================================================
+    class AudioControlSelectorRequests
+        : public AZ::EBusTraits
+    {
+    public:
+        // EBusTraits
+        static const AZ::EBusAddressPolicy AddressPolicy = AZ::EBusAddressPolicy::ById;
+        static const AZ::EBusHandlerPolicy HandlerPolicy = AZ::EBusHandlerPolicy::Single;
+        using BusIdType = AudioPropertyType;
+
+        virtual AZStd::string SelectResource(AZStd::string_view previousValue)
+        {
+            return previousValue;
+        }
+    };
+
+    using AudioControlSelectorRequestBus = AZ::EBus<AudioControlSelectorRequests>;
+
     //=============================================================================
     // Audio Control Selector Widget
     //=============================================================================

Code/Framework/AzToolsFramework/AzToolsFramework/UI/PropertyEditor/PropertyAudioCtrlTypes.h

@@ -18,15 +18,15 @@
 namespace AzToolsFramework
 {
     //=========================================================================
-    enum class AudioPropertyType
+    enum class AudioPropertyType : AZ::u32
     {
-        Invalid = 0,
-        Trigger,
+        Trigger = 0,
+        Rtpc,
         Switch,
         SwitchState,
-        Rtpc,
         Environment,
         Preload,
+        NumTypes,
     };
 
     //=========================================================================
@@ -40,7 +40,7 @@ namespace AzToolsFramework
         virtual ~CReflectedVarAudioControl() = default;
 
         AZStd::string m_controlName;
-        AudioPropertyType m_propertyType = AudioPropertyType::Invalid;
+        AudioPropertyType m_propertyType = AudioPropertyType::NumTypes;
 
         static void Reflect(AZ::ReflectContext* context)
         {