public bool Add(IRectangle rectangle)
{
Node before = null, after = this.Root;
int top = rectangle.getTop();
while (after != null)
{
before = after;
if (top < after.Data) //Is new node in left tree?
{
after = after.LeftNode;
}
else if (top > after.Data) //Is new node in right tree?
{
after = after.RightNode;
}
else
{
//Exist same value
return(false);
}
}
Node newNode = new Node();
newNode.Data = top;
newNode.Tag = rectangle;
if (this.Root == null) // Is tree is empty
{
this.Root = newNode;
}
else
{
if (top < before.Data)
{
before.LeftNode = newNode;
}
else
{
before.RightNode = newNode;
}
}
return(true);
}
private void Form1_Click(object sender, EventArgs e)
{
MouseEventArgs e2 = (MouseEventArgs)e;
IRectangle closest = store.findRectangleAt(e2.X, e2.Y);
MessageBox.Show(string.Format("The closest IRectangle locate in X: {0} Y: {1}", closest.getLeft(), closest.getTop()));
}