1 files changed, 56 insertions, 0 deletions
diff --git a/Master/Reference Architectures and Patterns/hjp5/examples/Listing2501.java b/Master/Reference Architectures and Patterns/hjp5/examples/Listing2501.java
new file mode 100644
index 0000000..3d034b7
--- /dev/null
+++ b/Master/Reference Architectures and Patterns/hjp5/examples/Listing2501.java
@@ -0,0 +1,56 @@
+/* Listing2501.java */
+
+import java.awt.*;
+import java.awt.event.*;
+
+public class Listing2501
+extends Frame
+{
+  public static void main(String[] args)
+  {
+    Listing2501 wnd = new Listing2501();
+  }
+
+  public Listing2501()
+  {
+    super("Der Farbenkreis");
+    addWindowListener(new WindowClosingAdapter(true));
+    setSize(300,200);
+    setVisible(true);
+  }
+
+  public void paint(Graphics g)
+  {
+    int top  = getInsets().top;
+    int left = getInsets().left;
+    int maxX = getSize().width-left-getInsets().right;
+    int maxY = getSize().height-top-getInsets().bottom;
+    Color col;
+    int[] arx   = {130,160,190};
+    int[] ary   = {60,110,60};
+    int[] arr   = {50,50,50};
+    int[] arcol = {0,0,0};
+    boolean paintit;
+    int dx, dy;
+
+    for (int y = 0; y < maxY; ++y) {
+      for (int x = 0; x < maxX; ++x) {
+        paintit = false;
+        for (int i = 0; i < arcol.length; ++i) {
+          dx = x - arx[i];
+          dy = y - ary[i];
+          arcol[i] = 0;
+          if ((dx*dx+dy*dy) <= arr[i]*arr[i]) {
+            arcol[i] = 255;
+            paintit = true;
+          }
+        }
+        if (paintit) {
+          col = new Color(arcol[0],arcol[1],arcol[2]);
+          g.setColor(col);
+          g.drawLine(x+left,y+top,x+left+1,y+top+1);
+        }
+      }
+    }
+  }
+}
+\ No newline at end of file