Nuovi progetti

DisegnoPazzo/.gitignore

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+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+.kotlin
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

DisegnoPazzo/.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

DisegnoPazzo/.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_25" default="true" project-jdk-name="25" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

DisegnoPazzo/.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/DisegnoPazzo.iml" filepath="$PROJECT_DIR$/DisegnoPazzo.iml" />
+    </modules>
+  </component>
+</project>

DisegnoPazzo/.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>

DisegnoPazzo/DisegnoPazzo.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

DisegnoPazzo/src/CerchioTrascinabile.java

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+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.*;
+import java.awt.geom.Ellipse2D;
+
+public class CerchioTrascinabile extends JFrame {
+
+    public CerchioTrascinabile() {
+        setTitle("Cerchio Trascinabile");
+        setSize(600, 500);
+        setLayout(null);
+        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        setLocationRelativeTo(null);
+        PannelloCerchio pannello = new PannelloCerchio();
+        JButton btnCancella = new JButton("Cancella");
+        btnCancella.addActionListener(e -> pannello.cancellaCerchio());
+        JPanel bottomPanel = new JPanel();
+        bottomPanel.add(btnCancella);
+        setLayout(new BorderLayout());
+        add(pannello, BorderLayout.CENTER);
+        add(bottomPanel, BorderLayout.SOUTH);
+    }
+
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(() -> {
+            new CerchioTrascinabile().setVisible(true);
+        });
+    }
+}
+
+class PannelloCerchio extends JPanel {
+    private Cerchio cerchio;
+    private boolean dragging = false;
+
+    public PannelloCerchio() {
+        setBackground(Color.WHITE);
+
+        addMouseListener(new MouseAdapter() {
+            @Override
+            public void mousePressed(MouseEvent e) {
+                if (cerchio == null) {
+                    cerchio = new Cerchio(e.getX(), e.getY());
+                    repaint();
+                } else if (cerchio.contiene(e.getX(), e.getY())) {
+                    dragging = true;
+                }
+            }
+
+            @Override
+            public void mouseReleased(MouseEvent e) {
+                dragging = false;
+            }
+        });
+
+        addMouseMotionListener(new MouseMotionAdapter() {
+            @Override
+            public void mouseDragged(MouseEvent e) {
+                if (dragging && cerchio != null) {
+                    cerchio.muovi(e.getX(), e.getY());
+                    repaint();
+                }
+            }
+        });
+    }
+
+    public void cancellaCerchio() {
+        cerchio = null;
+        repaint();
+    }
+
+    @Override
+    protected void paintComponent(Graphics g) {
+        super.paintComponent(g);
+        if (cerchio != null) {
+            Graphics2D g2d = (Graphics2D) g;
+            g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
+                    RenderingHints.VALUE_ANTIALIAS_ON);
+            cerchio.disegna(g2d);
+        }
+    }
+}
+
+class Cerchio {
+    private int x, y;
+    private static final int RAGGIO = 40;
+
+    public Cerchio(int x, int y) {
+        this.x = x;
+        this.y = y;
+    }
+
+    public void muovi(int nuovoX, int nuovoY) {
+        this.x = nuovoX;
+        this.y = nuovoY;
+    }
+
+    public boolean contiene(int px, int py) {
+        int dx = px - x;
+        int dy = py - y;
+        return dx * dx + dy * dy <= RAGGIO * RAGGIO;
+    }
+
+    public void disegna(Graphics2D g2d) {
+        g2d.setColor(new Color(70, 130, 180));
+        g2d.fillOval(x - RAGGIO, y - RAGGIO, RAGGIO * 2, RAGGIO * 2);
+
+        g2d.setColor(new Color(30, 90, 140));
+        g2d.setStroke(new BasicStroke(2));
+        g2d.drawOval(x - RAGGIO, y - RAGGIO, RAGGIO * 2, RAGGIO * 2);
+    }
+}