Initial commit

src/main/java/state/Drawer.java

+package state;
+
+import javafx.scene.canvas.Canvas;
+import shape.Circle;
+import shape.Shape;
+
+import java.util.ArrayList;
+import java.util.List;
+
+
+public class Drawer extends Canvas {
+    protected List<Shape> shapes = new ArrayList<>();
+    DrawerContext context = new DrawerContext(this);
+
+    public Drawer(int width, int height) {
+        super(width,height);
+        setFocusTraversable(true);
+        setOnMousePressed(event->context.mousePressed(event));
+        setOnMouseReleased(event->context.mouseReleased(event));
+        setOnMouseMoved(event->context.mouseMoved(event));
+        setOnMouseDragged(event->context.mouseMoved(event));
+        setOnKeyPressed(event -> context.keyPressed(event));
+    }
+
+    public void repaint(){
+        this.getGraphicsContext2D().clearRect(0,0,this.getWidth(),this.getHeight());
+    }
+}

src/main/java/state/DrawerContext.java

+package state;
+
+
+import javafx.scene.input.KeyEvent;
+import javafx.scene.input.MouseEvent;
+
+public class DrawerContext {
+
+    Drawer drawer;
+    DrawerState currentState;
+
+    public DrawerContext(Drawer drawer) {
+        this.drawer = drawer;
+    }
+
+    void mousePressed(MouseEvent event){
+        currentState.mousePressed(this,event.getX(),event.getY());
+
+    }
+
+    void mouseReleased(MouseEvent event){
+        currentState.mouseReleased(this,event.getX(),event.getY());
+    }
+
+    void mouseMoved(MouseEvent event){}
+
+    void keyPressed(KeyEvent event) {
+        switch (event.getText()) {
+            case "c":
+                currentState = new StateCircle0();
+        }
+    }
+}

src/main/java/state/DrawerState.java

+package state;
+
+public interface DrawerState {
+    void mousePressed(DrawerContext context, double x, double y);
+    void mouseReleased(DrawerContext context, double x, double y);
+}

src/main/java/state/StateCircle0.java

+package state;
+
+public class StateCircle0 implements DrawerState {
+    @Override
+    public void mousePressed(DrawerContext context, double x, double y) {
+
+    }
+
+    @Override
+    public void mouseReleased(DrawerContext context, double x, double y) {
+
+    }
+}