TP

DEV2.1/TP09/01_Volume/Cercle.java

@@ -0,0 +1,30 @@
+import java.awt.*;
+import javax.swing.*;
+
+public class Cercle extends JComponent {
+
+	private Color fond;
+
+	public Cercle(Color fond) {
+		this.fond = fond;
+	}
+
+	@Override
+	public void paintComponent(Graphics pinceau) {
+		Graphics secondPinceau = pinceau.create();
+
+		if (this.isOpaque()) {
+			pinceau.setColor(this.getBackground());
+			pinceau.fillRect(0, 0, this.getWidth(), this.getHeight());
+		}
+
+		pinceau.setColor(Color.DARK_GRAY);
+		pinceau.fillRect(0, 0, this.getWidth(), this.getHeight());
+		pinceau.setColor(this.fond);
+		pinceau.fillOval(this.getWidth()/4, this.getHeight()/4, this.getWidth()/2, this.getHeight()/2);
+	}
+
+	public void setFond(Color n) {
+		this.fond = n;
+	}
+}

DEV2.1/TP09/01_Volume/Fenetre.java

@@ -0,0 +1,29 @@
+import java.awt.*;
+import javax.swing.*;
+
+public class Fenetre extends JFrame {
+	public Fenetre() {
+		this.setSize(700, 100);
+		this.setLocation(100, 100);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		this.setLayout(new GridLayout(1, 10));
+
+		Cercle[] tabCercles = new Cercle[10];
+
+		for (int i = 0; i != 5; i++) {
+			Cercle nouveauCercle = new Cercle(Color.ORANGE);
+			this.add(nouveauCercle);
+			tabCercles[i] = nouveauCercle;
+		}
+
+		for (int i = 5; i != 10; i++) {
+			Cercle nouveauCercle = new Cercle(Color.LIGHT_GRAY);
+			this.add(nouveauCercle);
+			tabCercles[i] = nouveauCercle;
+		}
+
+		MoletteSouris gestionSouris = new MoletteSouris(this, tabCercles);
+		this.addMouseWheelListener(gestionSouris);
+	}
+
+}

DEV2.1/TP09/01_Volume/Main.java

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+public class Main {
+	public static void main(String[] args) {
+		Fenetre fenetre = new Fenetre();
+		fenetre.setVisible(true);
+	}
+}

DEV2.1/TP09/01_Volume/MoletteSouris.java

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+import java.awt.event.*;
+import java.awt.*;
+import javax.swing.*;
+
+public class MoletteSouris implements MouseWheelListener {
+
+	private Fenetre fenetre;
+	private Cercle[] tabCercles;
+	private int depart;
+
+	public MoletteSouris(Fenetre fenetre, Cercle[] tabCercles) {
+		this.fenetre = fenetre;
+		this.tabCercles = tabCercles;
+		this.depart = 5;
+	}
+
+	@Override 
+	public void mouseWheelMoved(MouseWheelEvent evenement) {
+		int sensRotation = evenement.getWheelRotation();
+		this.depart -= sensRotation;
+		
+		if (this.depart == 11) {
+			this.depart = 10;
+		}
+		else if (this.depart == -1) {
+			this.depart = 0;
+		} 
+		
+		for (int i = 0; i < this.depart ; i++) {
+			this.tabCercles[i].setFond(Color.ORANGE);
+		}
+		for (int i = this.depart; i < 10; i++) {
+			this.tabCercles[i].setFond(Color.LIGHT_GRAY);
+		}
+		this.fenetre.repaint();
+
+	}
+}