Add linear outline machinery

src/main/java/presenters/outline/LinearOutlineListener.java

@@ -1,5 +1,14 @@
 package presenters.outline;
 
+import domain.image.Image;
+
 public interface LinearOutlineListener {
 
-}
+    void onPrewittChanged(Image image);
+
+    void onSobelChanged(Image image);
+
+    void onLaplacian4Changed(Image image);
+
+    void onLaplacian8Changed(Image image);
+}

src/main/java/presenters/outline/LinearOutlinePresenter.java

@@ -2,8 +2,10 @@ package presenters.outline;
 
 import app.state.AppState;
 import app.state.LinearOutlineState;
+import domain.image.Image;
 import jakarta.inject.Inject;
 import services.OutlineService;
+import ui.abstractions.ILinearOutlineView;
 
 public class LinearOutlinePresenter implements LinearOutlineListener {
 
@@ -11,6 +13,8 @@ public class LinearOutlinePresenter implements LinearOutlineListener {
     private final LinearOutlineState outlineState;
     private final OutlineService outlineService;
 
+    private ILinearOutlineView view;
+
     @Inject
     public LinearOutlinePresenter(
             AppState appState,
@@ -20,24 +24,76 @@ public class LinearOutlinePresenter implements LinearOutlineListener {
         this.appState = appState;
         this.outlineState = outlineState;
         this.outlineService = outlineService;
+
+        outlineState.subscribe(this);
     }
 
-    public void setView(Object o) {
+    public void setView(ILinearOutlineView view) {
+        this.view = view;
     }
 
     public void dispose() {
+        view = null;
+        outlineState.unsubscribe(this);
     }
 
     public void computePrewittGradient(int direction) {
+        Image image = appState.getImage();
+
+        Image result = outlineService.prewittGradient(image, direction);
+
+        outlineState.setPrewitt(result);
     }
 
     public void computeSobelGradient(int direction) {
+        Image image = appState.getImage();
 
+        Image result = outlineService.sobelGradient(image, direction);
+
+        outlineState.setSobel(result);
     }
 
     public void computeLaplacian4() {
+        Image image = appState.getImage();
+
+        Image result = outlineService.laplacian4(image);
+
+        outlineState.setLaplacian4(result);
     }
 
     public void computeLaplacian8() {
+        Image image = appState.getImage();
+
+        Image result = outlineService.laplacian8(image);
+
+        outlineState.setLaplacian8(result);
     }
-}
+
+    @Override
+    public void onPrewittChanged(Image image) {
+        if (view != null) {
+            view.updatePrewitt(image);
+        }
+    }
+
+    @Override
+    public void onSobelChanged(Image image) {
+        if (view != null) {
+            view.updateSobel(image);
+        }
+    }
+
+    @Override
+    public void onLaplacian4Changed(Image image) {
+        if (view != null) {
+            view.updateLaplacian4(image);
+        }
+    }
+
+    @Override
+    public void onLaplacian8Changed(Image image) {
+        if (view != null) {
+            view.updateLaplacian8(image);
+        }
+    }
+}