Some Problems with the event handler

Question

Hi guys,

 

I would to like build a user control, called Cluster, with a little simple feauture:

 

This must to change color if happen a mouse move on with the left click buttun pressed.

 

My achivment is to change color to some closed cluster when i go over it with the mouse while the left click is pressed. 

 

So my problem is that when i leave a control and my left buttun is pressed, i can't intercept the new cluster and not to be abble to opertate on this one, because the event mousedown its still alive. I hope to have explained it in some way.

 

i build all my cluster in the with this code:

 

private void Form1_Load(object sender, EventArgs e)
        {
            int app = 0;
            for (int i = 0; i < panel1.Right; i += 15)
            {
                Cluster cluster = new Cluster();
                app += 30;
                cluster.Left = app;
                cluster.Name = "cluster" + i;
                panel1.Controls.Add(cluster);
            }
        }

 and this is my user control Cluster:

 

public Cluster()
        {
            InitializeComponent();
        }


        private void Cluster_Load(object sender, EventArgs e)
        {
            this.BackColor = Color.Gray;
        }


        private void Cluster_MouseDown(object sender, MouseEventArgs e)
        {
            switch (Control.MouseButtons)
            {
                case MouseButtons.Left:
                    this.BackColor = Color.Green;
                    break;

                case MouseButtons.Right:
                    this.BackColor = Color.Gray;
                    break;
            }
        }


        private void Cluster_MouseMove(object sender, MouseEventArgs e)
         {

             if (e.X < this.Width)
             {
                 (Application.OpenForms["Form1"]).Controls["txtProva"].Text = Convert.ToString(e.X);
             }
             else
             {
                 this.MouseDown - null; // i'll hope to lose the handler with this command
                 this.MouseDown -= Cluster_MouseDown;
             }
             switch (Control.MouseButtons)
             {
                 case MouseButtons.Left:
                     this.BackColor = Color.Green;

                     break;

                 case MouseButtons.Right:
                     this.BackColor = Color.Gray;
                     break;
             }

        }

 I really sorry for my English, thank you every body to read this post.

 

Et.