Material Editor camera controller zoom respects viewport boundary

Code/Framework/AzToolsFramework/AzToolsFramework/Viewport/ViewportMessages.h

@@ -246,6 +246,8 @@ namespace AzToolsFramework
             /// from ViewportCursorScreenPosition. This method will always return the correct position to generate a mouse
             /// position delta.
             virtual AZStd::optional<AzFramework::ScreenPoint> PreviousViewportCursorScreenPosition() = 0;
+            /// Is mouse over viewport.
+            virtual bool IsMouseOver() const = 0;
 
         protected:
             ~ViewportMouseCursorRequests() = default;

Gems/Atom/Tools/AtomToolsFramework/Code/Include/AtomToolsFramework/Viewport/RenderViewportWidget.h

@@ -103,6 +103,7 @@ namespace AtomToolsFramework
         void EndCursorCapture() override;
         AzFramework::ScreenPoint ViewportCursorScreenPosition() override;
         AZStd::optional<AzFramework::ScreenPoint> PreviousViewportCursorScreenPosition() override;
+        bool IsMouseOver() const override;
 
         // AzFramework::WindowRequestBus::Handler ...
         void SetWindowTitle(const AZStd::string& title) override;

Gems/Atom/Tools/AtomToolsFramework/Code/Source/Viewport/RenderViewportWidget.cpp

@@ -472,6 +472,11 @@ namespace AtomToolsFramework
                                                 : AZStd::optional<AzFramework::ScreenPoint>{};
     }
 
+    bool RenderViewportWidget::IsMouseOver() const
+    {
+        return m_mouseOver;
+    }
+
     void RenderViewportWidget::BeginCursorCapture()
     {
         if (m_capturingCursor)

Gems/Atom/Tools/MaterialEditor/Code/Source/Viewport/InputController/MaterialEditorViewportInputController.cpp

@@ -17,6 +17,8 @@
 #include <AzFramework/Input/Devices/Keyboard/InputDeviceKeyboard.h>
 #include <AzFramework/Input/Devices/Mouse/InputDeviceMouse.h>
 #include <AzFramework/Components/CameraBus.h>
+#include <AzFramework/Viewport/ScreenGeometry.h>
+#include <AzToolsFramework/Viewport/ViewportMessages.h>
 
 #include <AtomLyIntegration/CommonFeatures/Mesh/MeshComponentBus.h>
 #include <Atom/RPI.Public/RPISystemInterface.h>
@@ -136,6 +138,11 @@ namespace MaterialEditor
         const InputChannel::State state = event.m_inputChannel.GetState();
         const KeyMask keysOld = m_keys;
 
+        bool mouseOver = false;
+        AzToolsFramework::ViewportInteraction::ViewportMouseCursorRequestBus::EventResult(
+            mouseOver, GetViewportId(),
+            &AzToolsFramework::ViewportInteraction::ViewportMouseCursorRequestBus::Events::IsMouseOver);
+
         if (!m_behavior)
         {
             EvaluateControlBehavior();
@@ -178,7 +185,10 @@ namespace MaterialEditor
             }
             else if (inputChannelId == InputDeviceMouse::Movement::Z)
             {
-                m_behavior->MoveZ(event.m_inputChannel.GetValue());
+                if (mouseOver)
+                {
+                    m_behavior->MoveZ(event.m_inputChannel.GetValue());
+                }
             }
             break;
         case InputChannel::State::Ended:
@@ -222,7 +232,10 @@ namespace MaterialEditor
             }
             else if (inputChannelId == InputDeviceMouse::Movement::Z)
             {
-                m_behavior->MoveZ(event.m_inputChannel.GetValue());
+                if (mouseOver)
+                {
+                    m_behavior->MoveZ(event.m_inputChannel.GetValue());
+                }
             }
             break;
         }