X-Git-Url: https://gitweb.fperrin.net/?a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fgui%2Fmap%2FMapPosition.java;h=a70bbf63ba79b86c02114d785c3737d96b6625c5;hb=a94e508b8332721b65e3cc16f71da22cc46109a9;hp=25f05fc1a2a238370d8888ea4b807b7d3f5f8adb;hpb=8b20e3e027058cdf6ff52993ee5576193d08667a;p=GpsPrune.git

diff --git a/src/tim/prune/gui/map/MapPosition.java b/src/tim/prune/gui/map/MapPosition.java
index 25f05fc..a70bbf6 100644
--- a/src/tim/prune/gui/map/MapPosition.java
+++ b/src/tim/prune/gui/map/MapPosition.java
@@ -17,6 +17,8 @@ public class MapPosition
 	private int _zoom = 12;
 	/** Factor to zoom by, 2 to the power of zoom */
 	private int _zoomFactor = 1 << _zoom;
+	/** Flag to mark if this position has ever been set */
+	private boolean _empty = true;
 	/** Maximum zoom level */
 	private static final int MAX_ZOOM = 21;
 
@@ -51,6 +53,7 @@ public class MapPosition
 		setZoom(requiredZoom);
 		_xPosition = transformToPixels((inMinX + inMaxX) / 2.0);
 		_yPosition = transformToPixels((inMinY + inMaxY) / 2.0);
+		_empty = false;
 	}
 
 	/**
@@ -61,6 +64,7 @@ public class MapPosition
 	{
 		_zoom = inZoom;
 		_zoomFactor = 1 << _zoom;
+		_empty = false;
 	}
 
 	/**
@@ -93,6 +97,7 @@ public class MapPosition
 		// Set position
 		_xPosition = (_xPosition - inWidth/2 + (inMinX + inMaxX) / 2) * multFactor;
 		_yPosition = (_yPosition - inHeight/2 + (inMinY + inMaxY) / 2) * multFactor;
+		_empty = false;
 	}
 
 	/**
@@ -277,4 +282,12 @@ public class MapPosition
 		_xPosition += inDeltaX;
 		_yPosition += inDeltaY;
 	}
+
+	/**
+	 * @return true if this position has never been set
+	 */
+	public boolean isEmpty()
+	{
+		return _empty;
+	}
 }