Consistent 0.5s update frequency on input images regardless of number of events

Source/StevesUEHelpers/Private/StevesUI/InputImage.cpp

@@ -15,6 +15,7 @@ TSharedRef<SWidget> UInputImage::RebuildWidget()
         bSubbedToInputEvents = true;
         GS->OnInputModeChanged.AddUniqueDynamic(this, &UInputImage::OnInputModeChanged);
         GS->OnButtonInputModeChanged.AddUniqueDynamic(this, &UInputImage::OnInputModeChanged);
+        GS->OnAxisInputModeChanged.AddUniqueDynamic(this, &UInputImage::OnInputModeChanged);
     }
     UpdateImage();
 
@@ -25,11 +26,12 @@ void UInputImage::OnInputModeChanged(int ChangedPlayerIdx, EInputMode InputMode)
 {
     if (ChangedPlayerIdx == PlayerIndex)
     {
+        // Delay update, in case multiple received in short succession
+        MarkImageDirty();
         // auto GS = GetStevesGameSubsystem(GetWorld());
         // UE_LOG(LogTemp, Warning, TEXT("Updating image for input mode change: %s Button device: %s"),
         //     *UEnum::GetValueAsString(InputMode),
         //     *UEnum::GetValueAsString(GS->GetLastInputButtonPressed(ChangedPlayerIdx)));
-        UpdateImage();
     }
 }
 
@@ -48,6 +50,7 @@ void UInputImage::BeginDestroy()
     {
         GS->OnInputModeChanged.RemoveAll(this);
         GS->OnButtonInputModeChanged.RemoveAll(this);
+        GS->OnAxisInputModeChanged.RemoveAll(this);
     }
 }
 
@@ -104,4 +107,15 @@ void UInputImage::UpdateImage()
             SetBrushFromAtlasInterface(Sprite, true);
         }
     }
+    DelayedUpdateImageTimer.Invalidate();
+}
+
+void UInputImage::MarkImageDirty()
+{
+    if (!DelayedUpdateImageTimer.IsValid())
+    {
+        // Delayed update
+        GetWorld()->GetTimerManager().SetTimer(DelayedUpdateImageTimer, this, &UInputImage::UpdateImage, 0.5f);
+    }
+
 }

Source/StevesUEHelpers/Private/StevesUI/RichTextBlockInputImageDecorator.cpp

@@ -154,7 +154,7 @@ public:
                 }
                 
             }
-            TimeUntilNextSpriteCheck = 0.25f;
+            TimeUntilNextSpriteCheck = 0.5f;
         }
     }
 };

Source/StevesUEHelpers/Public/StevesUI/InputImage.h

@@ -40,6 +40,8 @@ protected:
     UUiTheme* CustomTheme;
 
     bool bSubbedToInputEvents = false;
+
+    FTimerHandle DelayedUpdateImageTimer;
 public:
 
     /// Tell this image to display the bound action for the current input method
@@ -78,6 +80,7 @@ public:
 protected:
 
     virtual TSharedRef<SWidget> RebuildWidget() override;
+    virtual void MarkImageDirty();
     virtual void UpdateImage();
         
     UFUNCTION()