1 files changed, 52 insertions, 0 deletions
diff --git a/Master/Reference Architectures and Patterns/hjp5/examples/Listing2905.java b/Master/Reference Architectures and Patterns/hjp5/examples/Listing2905.java
new file mode 100644
index 0000000..1a8d40c
--- /dev/null
+++ b/Master/Reference Architectures and Patterns/hjp5/examples/Listing2905.java
@@ -0,0 +1,52 @@
+/* Listing2905.java */
+
+import java.awt.*;
+import java.awt.event.*;
+
+public class Listing2905
+extends Frame
+implements FocusListener
+{
+  boolean havefocus = false;
+
+  public static void main(String[] args)
+  {
+    Listing2905 wnd = new Listing2905();
+  }
+
+  public Listing2905()
+  {
+    super("Focus-Listener");
+    addFocusListener(this);
+    addWindowListener(new WindowClosingAdapter(true));
+    setBackground(Color.lightGray);
+    setSize(300,200);
+    setLocation(200,100);
+    setVisible(true);
+  }
+
+  public void paint(Graphics g)
+  {
+    if (havefocus) {
+      g.setColor(Color.black);
+      g.drawString("Fokus erhalten",10,50);
+    } else {
+      g.setColor(Color.darkGray);
+      g.drawString("Kein Fokus",10,50);
+    }
+  }
+
+  public void focusGained(FocusEvent event)
+  {
+    havefocus = true;
+    setBackground(Color.yellow);
+    repaint();
+  }
+
+  public void focusLost(FocusEvent event)
+  {
+    havefocus = false;
+    setBackground(Color.lightGray);
+    repaint();
+  }
+}
+\ No newline at end of file