Radial menus are in good shape

Source/Integration/RadialMenu.h

@@ -7,6 +7,7 @@
 
 #include "CoreMinimal.h"
 #include "Components/Widget.h"
+#include "Fonts/SlateFontInfo.h"
 #include "RadialMenu.generated.h"
 
 class SRadialMenu;
@@ -19,10 +20,10 @@ struct FRadialMenuConfig
     GENERATED_BODY()
 
     UPROPERTY(EditAnywhere, Category="RadialMenu")
-    int32 NumItems = 8;
+    TArray<FString> MenuItems;
 
     UPROPERTY(EditAnywhere, Category="RadialMenu")
-    float ItemHeight = 20.0f;
+    FSlateFontInfo Font;
 
     UPROPERTY(EditAnywhere, Category="RadialMenu")
     float InnerRadius = 20.0f;
@@ -37,7 +38,7 @@ struct FRadialMenuConfig
     float LineThickness = 4.0f;
 
     UPROPERTY(EditAnywhere, Category="RadialMenu")
-    FLinearColor LineColor = FLinearColor::White;
+    FLinearColor ItemColor = FLinearColor::White;
 
     UPROPERTY(EditAnywhere, Category="RadialMenu")
     TObjectPtr<UTexture2D> DotTexture;
@@ -45,6 +46,12 @@ struct FRadialMenuConfig
     UPROPERTY(EditAnywhere, Category="RadialMenu")
     float DotRadius = 3.0f;
 
+    UPROPERTY(EditAnywhere, Category="RadialMenu")
+    TObjectPtr<UTexture2D> Teardrop;
+
+    UPROPERTY(EditAnywhere, Category="RadialMenu")
+    float TeardropRadius = 0.0f;
+
     UPROPERTY(EditAnywhere, Category="RadialMenu")
     int32 SelectedItem = -1;
 
@@ -73,8 +80,16 @@ struct FRadialMenuItem
     UPROPERTY(BlueprintReadOnly)
     bool RightSide = false;
 
+    UPROPERTY(BlueprintReadOnly)
+    FVector2D TextSize = {0,0};
+
     static TArray<FRadialMenuItem> Calculate(const FRadialMenuConfig &Config);
 
+    // Like Calculate, but only produces the unit-vector direction of
+    // each spoke.  Cheaper to evaluate when only the spoke directions
+    // are needed (e.g. for hit-testing a pointer against the wheel).
+    static TArray<FVector2D> CalculateDirections(int32 NumItems);
+
 private:
     using View = TArrayView<FRadialMenuItem>;
 
@@ -112,59 +127,29 @@ class URadialMenuWidget : public UWidget
 
 public:
     UFUNCTION(BlueprintCallable)
-    void SetNumItems(int32 NewNumItems);
+    void SetMenuItems(const TArray<FString>& NewMenuItems);
 
     UFUNCTION(BlueprintCallable)
-    void SetItemHeight(float NewItemHeight);
+    void ClearMenuItems() { SetMenuItems({}); }
 
     UFUNCTION(BlueprintCallable)
-    void SetInnerRadius(float NewInnerRadius);
-
-    UFUNCTION(BlueprintCallable)
-    void SetMinSpoke(float NewMinSpoke);
-
-    UFUNCTION(BlueprintCallable)
-    void SetSpread(float NewSpread);
-
-    UFUNCTION(BlueprintCallable)
-    void SetLineThickness(float NewLineThickness);
-
-    UFUNCTION(BlueprintCallable)
-    void SetLineColor(FLinearColor NewLineColor);
-
-    UFUNCTION(BlueprintCallable)
-    void SetDotTexture(UTexture2D* NewDotTexture);
-
-    UFUNCTION(BlueprintCallable)
-    void SetDotRadius(float NewDotRadius);
-
-    UFUNCTION(BlueprintCallable)
-    bool SetSelectedItem(int32 NewSelectedItem);
-
-    UFUNCTION(BlueprintCallable)
-    void SetSelectedColor(FLinearColor NewSelectedColor);
-
-    UFUNCTION(BlueprintCallable)
-    void SetSelectedThickness(float NewSelectedThickness);
-
-    UFUNCTION(BlueprintCallable)
-    const TArray<FRadialMenuItem> &GetItems() const { return Items; }
+    void SetSelectedItem(int32 NewSelectedItem);
 
     // Returns true if the selected item changed.
     UFUNCTION(BlueprintCallable)
-    bool AddPointer(FVector2D Direction, float Scale);
+    void AddPointer(FVector2D Direction, float Scale);
 
     UFUNCTION(BlueprintCallable)
     FVector2D GetPointer() const { return PointerVector; }
-    
+
     UFUNCTION(BlueprintCallable)
-    FLinearColor GetItemColor(int N) const;
-    
+    FString GetSelectedMenuItem() const;
+
 protected:
     UPROPERTY(EditAnywhere)
     FRadialMenuConfig Config;
 
-    TArray<FRadialMenuItem> Items;
+    TArray<FVector2D> Directions;
 
     FVector2D PointerVector = {0,0};