Added description for point quad tree example

metaloom · May 8, 2011 · 6a8b7d7 · 6a8b7d7
1 parent 697f9ec
commit 6a8b7d7
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Showing 2 changed files with 16 additions and 1 deletion.
diff --git a/src/main/java/at/jotschi/quadtree/point/PointNode.java b/src/main/java/at/jotschi/quadtree/point/PointNode.java
@@ -211,5 +211,6 @@ public void clear() {
 			node.clear();
 		}
 		elements.clear();
+		nodes.clear();
 	}
 }
diff --git a/src/test/java/at/jotschi/quadtree/RenderPointQuadTree.java b/src/test/java/at/jotschi/quadtree/RenderPointQuadTree.java
@@ -51,6 +51,9 @@ protected PointQuadTree<String> createQuadTree() {
 
 	@Override
 	protected void paintComponent(Graphics g) {
+		g.drawString(
+				"Left click to add new points. Right click to highlight all elements of a selected cell/node.",
+				100, 80);
 		PointNode<String> rootNode = tree.getRootNode();
 		drawCells(rootNode, g);
 	}
@@ -104,7 +107,18 @@ public void drawElements(PointNode node, Graphics g) {
 		}
 	}
 
-
+	public void keyReleased(KeyEvent e) {
+
+		if (e.getKeyCode() == 27) {
+			System.exit(10);
+		} else if (e.getKeyCode() == 67) {
+			log.debug("Invoking clearing of tree.");
+			tree.clear();
+			repaint();
+		}
+
+	}
+
 	public void mouseClicked(MouseEvent e) {
 
 		Point p = e.getPoint();