CheckedListBox Control - Only checking the checkbox when the actual checkbox is clicked

Question

I\'m using a CheckedListBox control in a small application I\'m working on. It\'s a nice control, but one thing bothers me; I can\'t set a property so that it only checks th

Answer 1

Well, it is quite ugly, but you could calculate mouse hit coordinates against rectangles of items by hooking on CheckedListBox.MouseDown and CheckedListBox.ItemCheck like the following

/// 

/// In order to control itemcheck changes (blinds double clicking, among other things)
/// 
bool AuthorizeCheck { get; set; }

private void checkedListBox1_ItemCheck(object sender, ItemCheckEventArgs e)
{
    if(!AuthorizeCheck)
        e.NewValue = e.CurrentValue; //check state change was not through authorized actions
}

private void checkedListBox1_MouseDown(object sender, MouseEventArgs e)
{
    Point loc = this.checkedListBox1.PointToClient(Cursor.Position);
    for (int i = 0; i < this.checkedListBox1.Items.Count; i++)
    {
        Rectangle rec = this.checkedListBox1.GetItemRectangle(i);
        rec.Width = 16; //checkbox itself has a default width of about 16 pixels

        if (rec.Contains(loc))
        {
            AuthorizeCheck = true;
            bool newValue = !this.checkedListBox1.GetItemChecked(i);
            this.checkedListBox1.SetItemChecked(i, newValue);//check 
            AuthorizeCheck = false;

            return;
        }
    }
}