Add onLayerOrderChanged() method to ISpriteHandler

include/scratchcpp/ispritehandler.h

@@ -44,6 +44,9 @@ class LIBSCRATCHCPP_EXPORT ISpriteHandler
         /*! Called when the rotation style changes. */
         virtual void onRotationStyleChanged(Sprite::RotationStyle rotationStyle) = 0;
 
+        /*! Called when the layer order changes. */
+        virtual void onLayerOrderChanged(int layerOrder) = 0;
+
         /*!
          * Called when the value of the given graphics effect changes.
          * \note This method isn't called when all effects are cleared, use onGraphicsEffectsCleared() for this.

include/scratchcpp/sprite.h

@@ -64,6 +64,8 @@ class LIBSCRATCHCPP_EXPORT Sprite
         void setRotationStyle(const std::string &newRotationStyle);
         void setRotationStyle(const char *newRotationStyle);
 
+        void setLayerOrder(int newLayerOrder) override;
+
         Rect boundingRect() const;
         void keepInFence(double newX, double newY, double *fencedX, double *fencedY) const;
 

include/scratchcpp/target.h

@@ -73,7 +73,7 @@ class LIBSCRATCHCPP_EXPORT Target
         int findSound(const std::string &soundName) const;
 
         int layerOrder() const;
-        void setLayerOrder(int newLayerOrder);
+        virtual void setLayerOrder(int newLayerOrder);
 
         double volume() const;
         void setVolume(double newVolume);

src/scratch/sprite.cpp

@@ -315,6 +315,15 @@ void Sprite::setRotationStyle(const char *newRotationStyle)
     setRotationStyle(std::string(newRotationStyle));
 }
 
+/*! Overrides Target#setLayerOrder(). */
+void Sprite::setLayerOrder(int newLayerOrder)
+{
+    Target::setLayerOrder(newLayerOrder);
+
+    if (impl->iface)
+        impl->iface->onLayerOrderChanged(newLayerOrder);
+}
+
 /*! Returns the bounding rectangle of the sprite. */
 Rect Sprite::boundingRect() const
 {

test/mocks/spritehandlermock.h

@@ -21,6 +21,7 @@ class SpriteHandlerMock : public ISpriteHandler
         MOCK_METHOD(void, onSizeChanged, (double), (override));
         MOCK_METHOD(void, onDirectionChanged, (double), (override));
         MOCK_METHOD(void, onRotationStyleChanged, (Sprite::RotationStyle), (override));
+        MOCK_METHOD(void, onLayerOrderChanged, (int), (override));
         MOCK_METHOD(void, onGraphicsEffectChanged, (IGraphicsEffect *, double), (override));
         MOCK_METHOD(void, onGraphicsEffectsCleared, (), (override));
 

test/scratch_classes/sprite_test.cpp

@@ -493,6 +493,14 @@ TEST(SpriteTest, RotationStyle)
     ASSERT_EQ(sprite.rotationStyleStr(), "all around");
 }
 
+TEST(SpriteTest, LayerOrder)
+{
+    Sprite sprite;
+    ASSERT_EQ(sprite.layerOrder(), 0);
+    sprite.setLayerOrder(2);
+    ASSERT_EQ(sprite.layerOrder(), 2);
+}
+
 TEST(SpriteTest, KeepInFence)
 {
     Sprite sprite;

test/scratch_classes/stage_test.cpp

@@ -128,3 +128,11 @@ TEST(StageTest, GraphicsEffects)
     ASSERT_EQ(stage.graphicsEffectValue(&effect1), 0);
     ASSERT_EQ(stage.graphicsEffectValue(&effect2), 0);
 }
+
+TEST(StageTest, LayerOrder)
+{
+    Stage stage;
+    ASSERT_EQ(stage.layerOrder(), 0);
+    stage.setLayerOrder(2);
+    ASSERT_EQ(stage.layerOrder(), 2);
+}

test/target_interfaces/ispritehandler_test.cpp

@@ -118,6 +118,12 @@ TEST_F(ISpriteHandlerTest, RotationStyle)
     m_sprite.setRotationStyle(Sprite::RotationStyle::LeftRight);
 }
 
+TEST_F(ISpriteHandlerTest, LayerOrder)
+{
+    EXPECT_CALL(m_handler, onLayerOrderChanged(7)).Times(1);
+    m_sprite.setLayerOrder(7);
+}
+
 TEST_F(ISpriteHandlerTest, Costume)
 {
     auto costume1 = std::make_shared<Costume>("", "", "");