From 44ac0ca64197a9e21ed78e128ef816a6c85e05fe Mon Sep 17 00:00:00 2001
From: Ben Burwell <ben.burwell@trifecta.com>
Date: Sat, 19 Nov 2016 00:17:13 -0500
Subject: Show range info

---
 .../planes/gui/AircraftMapComponent.java           | 23 ++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/src/com/benburwell/planes/gui/AircraftMapComponent.java b/src/com/benburwell/planes/gui/AircraftMapComponent.java
index d680b60..780f1db 100644
--- a/src/com/benburwell/planes/gui/AircraftMapComponent.java
+++ b/src/com/benburwell/planes/gui/AircraftMapComponent.java
@@ -84,6 +84,7 @@ public class AircraftMapComponent implements ViewComponent {
         private final double MIN_LATITUDE = -90.0;
         private final double MAX_LONGITUDE = 180.0;
         private final double MIN_LONGITUDE = -180.0;
+        private final int RING_SPACING = 10;
         private List<Drawable> planes = new ArrayList<>();
         private double centerLatitude;
         private double centerLongitude;
@@ -101,6 +102,7 @@ public class AircraftMapComponent implements ViewComponent {
             super.paintComponent(g);
             this.planes.forEach(item -> item.drawOn(g, this));
             this.drawPositionAndScale(g);
+            this.drawRange(g);
         }
 
         public void drawPositionAndScale(Graphics g) {
@@ -112,6 +114,23 @@ public class AircraftMapComponent implements ViewComponent {
             g.drawString(String.format("%08.5f E", this.centerLongitude), TEXT_PADDING, (int)FONT_SIZE * 2 + TEXT_PADDING);
         }
 
+        public void drawRange(Graphics g) {
+            int centerX = this.getWidth() / 2;
+            int centerY = this.getHeight() / 2;
+            g.setColor(GraphicsTheme.Colors.BASE_3);
+            int diameter = (int) this.getPixelsPerNauticalMile() * RING_SPACING;
+            int ringNumber = 1;
+            while (diameter < this.getWidth() || diameter < this.getHeight()) {
+                g.drawOval(centerX - (diameter / 2), centerY - (diameter / 2), diameter, diameter);
+                g.drawString(String.format("%d", ringNumber * RING_SPACING), centerX + (diameter / 2) + TEXT_PADDING, (int) (centerY + FONT_SIZE + TEXT_PADDING));
+                g.drawString(String.format("%d", ringNumber * RING_SPACING), centerX + TEXT_PADDING, centerY - (int) ((diameter / 2) + FONT_SIZE));
+                diameter += this.getPixelsPerNauticalMile() * 10;
+                ringNumber++;
+            }
+            g.drawLine(centerX, 0, centerX, this.getHeight());
+            g.drawLine(0, centerY, this.getWidth(), centerY);
+        }
+
         public void setPlanes(List<Drawable> planes) {
             this.planes = planes;
             this.invalidate();
@@ -134,6 +153,10 @@ public class AircraftMapComponent implements ViewComponent {
             return this.pixelsPerDegree;
         }
 
+        public double getPixelsPerNauticalMile() {
+            return this.pixelsPerDegree / 60.0;
+        }
+
         public void zoomIn() {
             this.pixelsPerDegree += ZOOM_INTERVAL;
             this.invalidate();
-- 
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