Base java event POC

src/main/java/ovh/gasser/newshapes/ui/Controller.java

@@ -0,0 +1,70 @@
+package ovh.gasser.newshapes.ui;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import ovh.gasser.newshapes.Selection;
+import ovh.gasser.newshapes.shapes.SCollection;
+import ovh.gasser.newshapes.shapes.Shape;
+
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+import java.util.Optional;
+
+public class Controller {
+    private final Logger logger = LoggerFactory.getLogger(ShapesView.class);
+    private final ShapesView view;
+    private final Shape model;
+    private Selection selection;
+
+    Controller(ShapesView view, Shape model) {
+        this.view = view;
+        this.model = model;
+        var adapter = new MouseAdapter() {
+            @Override
+            public void mousePressed(MouseEvent evt) {
+                handleMousePressed(evt);
+            }
+
+            @Override
+            public void mouseDragged(MouseEvent evt) {
+                handleMouseDragged(evt);
+            }
+        };
+        this.view.addMouseMotionListener(adapter);
+        this.view.addMouseListener(adapter);
+    }
+
+    private void handleMouseDragged(MouseEvent evt) {
+        if (selection != null) selection.shape.setLoc(evt.getPoint());
+        view.repaint();
+    }
+
+    private void handleMousePressed(MouseEvent evt) {
+        var sc = (SCollection) this.model;
+        getTarget(evt, sc)
+                .ifPresentOrElse(
+                        s -> {
+                            if (selection != null) resetSelection();
+                            selection = new Selection(s, true);
+                            this.logger.debug("Selecting {}", selection.shape);
+                        },
+                        () -> {
+                            if (selection != null) resetSelection();
+                        }
+                );
+        view.repaint();
+    }
+
+    private void resetSelection() {
+        this.logger.debug("Un-selecting {}", selection.shape);
+        selection.unselect();
+        selection = null;
+    }
+
+    private Optional<Shape> getTarget(MouseEvent evt, SCollection sc) {
+        return sc.stream()
+                .filter(s -> s.getBounds().contains(evt.getPoint()))
+                .findFirst();
+    }
+
+}