From 2426ee78f0823062e2cf015d6c076fec10189f02 Mon Sep 17 00:00:00 2001
From: Mattrixwv <m_ellison@ymail.com>
Date: Thu, 28 Feb 2019 18:58:45 -0500
Subject: [PATCH] Created a program that will draw a rainbow in a popup window

---
 DrawRainbow.java     | 45 ++++++++++++++++++++++++++++++++++++++++++++
 DrawRainbowTest.java | 21 +++++++++++++++++++++
 2 files changed, 66 insertions(+)
 create mode 100644 DrawRainbow.java
 create mode 100644 DrawRainbowTest.java

diff --git a/DrawRainbow.java b/DrawRainbow.java
new file mode 100644
index 0000000..085c1cb
--- /dev/null
+++ b/DrawRainbow.java
@@ -0,0 +1,45 @@
+//Java/JavaTutorials/DrawRainbow.java
+//Matthew Ellison
+// Created: 02-28-19
+//Modified: 02-28-19
+//This program draws a rainbow on a panel
+
+
+import java.awt.Color;
+import java.awt.Graphics;
+import javax.swing.JPanel;
+
+
+public class DrawRainbow extends JPanel{
+	//Define some extra colors
+	private static final Color VIOLET = new Color(128, 0, 128);
+	private static final Color INDIGO = new Color(75, 0, 130);
+	private static final Color BACKGROUND_COLOR = Color.WHITE;
+
+	//For the colors used in the rainbow. The two background colors represent a blank space
+	private static final Color[] colors = {BACKGROUND_COLOR, BACKGROUND_COLOR, VIOLET, INDIGO, Color.BLUE, Color.GREEN, Color.YELLOW, Color.ORANGE, Color.RED};
+
+	public DrawRainbow(){
+		setBackground(BACKGROUND_COLOR);
+	}
+
+	//Draws a rainbow using concentric arcs
+	public void paintComponent(Graphics g){
+		super.paintComponent(g);
+
+		int radius = 100;	//The radius of an arc
+
+		//Draw the rainbow near the bottom-center
+		int centerX = getWidth() / 2;
+		int centerY = getHeight() - 10;
+
+		//Draws filled arcs starting with the outermost
+		for(int cnt = colors.length;cnt > 0;--cnt){
+			//Set the color for the current arc
+			g.setColor(colors[cnt - 1]);
+
+			//Fill the arc from 0 to 180 degrees
+			g.fillArc(centerX - cnt * radius, centerY - cnt * radius, cnt * radius * 2, cnt * radius * 2, 0, 180);
+		}
+	}
+}
\ No newline at end of file
diff --git a/DrawRainbowTest.java b/DrawRainbowTest.java
new file mode 100644
index 0000000..de7e07b
--- /dev/null
+++ b/DrawRainbowTest.java
@@ -0,0 +1,21 @@
+//Java/JavaTutorials/DrawRainbowTest.java
+//Matthew Ellison
+// Created: 02-28-19
+//Modified: 02-28-19
+//This program runs a test of DrawRainbow
+
+
+import javax.swing.JFrame;
+
+
+public class DrawRainbowTest{
+	public static void main(String[] argv){
+		DrawRainbow panel = new DrawRainbow();
+		JFrame application = new JFrame();
+
+		application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		application.add(panel);
+		application.setSize(1920, 1080);
+		application.setVisible(true);
+	}
+}
\ No newline at end of file