From 33613a85afc4b1481367fbe92a17ee59c240250b Mon Sep 17 00:00:00 2001
From: Sven Eisenhauer <sven@sven-eisenhauer.net>
Date: Fri, 10 Nov 2023 15:11:48 +0100
Subject: add new repo

---
 .../hjp5/examples/Listing3415.java                 | 99 ++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 Master/Reference Architectures and Patterns/hjp5/examples/Listing3415.java

(limited to 'Master/Reference Architectures and Patterns/hjp5/examples/Listing3415.java')

diff --git a/Master/Reference Architectures and Patterns/hjp5/examples/Listing3415.java b/Master/Reference Architectures and Patterns/hjp5/examples/Listing3415.java
new file mode 100644
index 0000000..6b6bfac
--- /dev/null
+++ b/Master/Reference Architectures and Patterns/hjp5/examples/Listing3415.java	
@@ -0,0 +1,99 @@
+/* Listing3415.java */
+
+import java.awt.*;
+import java.awt.event.*;
+
+public class Listing3415
+extends Frame
+implements Runnable
+{
+  private Thread th;
+  private int actx;
+  private int dx;
+  private int actarc1;
+  private int actarc2;
+  private Image dbImage;
+  private Graphics dbGraphics;
+
+  public static void main(String[] args)
+  {
+    Listing3415 frame = new Listing3415();
+    frame.setSize(210,170);
+    frame.setVisible(true);
+    frame.startAnimation();
+  }
+
+  public Listing3415()
+  {
+    super("Ameisenanimation");
+    addWindowListener(new WindowClosingAdapter(true));
+  }
+
+  public void startAnimation()
+  {
+    Thread th = new Thread(this);
+    th.start();
+  }
+
+  public void run()
+  {
+    actx = 0;
+    dx = 1;
+    actarc1 = 0;
+    actarc2 = 0;
+    while (true) {
+      repaint();
+      actx += dx;
+      if (actx < 0 || actx > 100) {
+        dx = -dx;
+        actx += 2*dx;
+      }
+      actarc1 = (actarc1 + 1) % 360;
+      actarc2 = (actarc2 + 2) % 360;
+      try {
+        Thread.sleep(40);
+      } catch (InterruptedException e) {
+        //nichts
+      }
+    }
+  }
+
+  public void update(Graphics g)
+  {
+    //Double-Buffer initialisieren
+    if (dbImage == null) {
+      dbImage = createImage(
+        this.getSize().width,
+        this.getSize().height
+      );
+      dbGraphics = dbImage.getGraphics();
+    }
+    //Hintergrund löschen
+    dbGraphics.setColor(getBackground());
+    dbGraphics.fillRect(
+      0,
+      0,
+      this.getSize().width,
+      this.getSize().height
+    );
+    //Vordergrund zeichnen
+    dbGraphics.setColor(getForeground());
+    paint(dbGraphics);
+    //Offscreen anzeigen
+    g.drawImage(dbImage,0,0,this);
+  }
+
+  public void paint(Graphics g)
+  {
+    int xoffs = getInsets().left;
+    int yoffs = getInsets().top;
+    g.setColor(Color.lightGray);
+    g.fillOval(xoffs+actx,yoffs+20,100,100);
+    g.setColor(Color.red);
+    g.drawArc(xoffs+actx,yoffs+20,100,100,actarc1,10);
+    g.drawArc(xoffs+actx-1,yoffs+19,102,102,actarc1,10);
+    g.setColor(Color.blue);
+    g.drawArc(xoffs+actx,yoffs+20,100,100,360-actarc2,10);
+    g.drawArc(xoffs+actx-1,yoffs+19,102,102,360-actarc2,10);
+  }
+}
\ No newline at end of file
-- 
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