Added javadocs, made minor changes to the comments

1 files changed, 46 insertions, 5 deletions

diff --git a/src/jcgp/gui/dragresize/HorizontalDragResize.java b/src/jcgp/gui/dragresize/HorizontalDragResize.java
index 84c322f..b618b74 100644
--- a/src/jcgp/gui/dragresize/HorizontalDragResize.java
+++ b/src/jcgp/gui/dragresize/HorizontalDragResize.java
@@ -7,9 +7,11 @@ import javafx.scene.layout.Region;
 import jcgp.gui.GUI;
 
 /**
- * 
- * Decorator pattern.
- * 
+ * This class adds horizontal drag resize functionality to any 
+ * arbitrary region provided. This is done by using the static
+ * method {@code makeDragResizable()}.
+ * <br><br>
+ * This is based on a class by Andrew Till found on:
  * http://andrewtill.blogspot.co.uk/2012/12/dragging-to-resize-javafx-region.html
  * 
  */
@@ -18,13 +20,29 @@ public class HorizontalDragResize {
 	private boolean dragging = false;
 	private final Region region;
 	
+	/**
+	 * For internal use only, creates an instance of the actual
+	 * resizer used.
+	 * 
+	 * @param region the region to make resizable.
+	 */
 	private HorizontalDragResize(Region region) {
 		this.region = region;
 	}
 	
+	/**
+	 * Makes the specified region drag resizable.
+	 * This particular implementation only creates a resize 
+	 * click-and-drag area on the left side of the region. 
+	 * The resize area is defined by {@code GUI.RESIZE_MARGIN}.
+	 * 
+	 * @param region the region to make resizable.
+	 */
 	public static void makeDragResizable(final Region region) {
+		// make the instance, this actually performs the resizing
 		final HorizontalDragResize dr = new HorizontalDragResize(region);
 
+		// set mouse listeners
 		region.setOnMousePressed(new EventHandler<MouseEvent>() {
 			@Override
 			public void handle(MouseEvent event) {
@@ -52,12 +70,22 @@ public class HorizontalDragResize {
 		
 	}
 	
+	/**
+	 * If the press happened in the resize area, raise the drag flag.
+	 * 
+	 * @param event the associated mouse event.
+	 */
 	private void mousePressed(MouseEvent event) {
 		if(isInDraggableZone(event)) {
 	        dragging = true;
         }
 	}
 
+	/**
+	 * If drag flag is high, resize the region to match the mouse position.
+	 * 
+	 * @param event the associated mouse event.
+	 */
 	private void mouseDragged(MouseEvent event) {
 		if(dragging) {
 			double newWidth = region.getWidth() - event.getX();
@@ -69,20 +97,33 @@ public class HorizontalDragResize {
 		}
 	}
 	
+	/**
+	 * Change the cursor if the mouse position overlaps with the resize area.
+	 * 
+	 * @param event the associated mouse event.
+	 */
 	private void mouseMoved(MouseEvent event) {
 		if(isInDraggableZone(event) || dragging) {
 			region.setCursor(Cursor.H_RESIZE);
-		}
-		else {
+		} else {
 			region.setCursor(Cursor.DEFAULT);
 		}
 	}
 
+	/**
+	 * Finish resizing.
+	 */
 	private void mouseReleased() {
 		dragging = false;
 		region.setCursor(Cursor.DEFAULT);
 	}
 
+	/**
+	 * Assert whether the mouse cursor is in the draggable area defined by {@code GUI.RESIZE_MARGIN}.
+	 * 
+	 * @param event the associated mouse event.
+	 * @return true if the mouse position is in the draggable area.
+	 */
 	private boolean isInDraggableZone(MouseEvent event) {
 		return event.getX() < (GUI.RESIZE_MARGIN);
 	}