using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace Harbormist
{
    public partial class MainForm : Form
    {

        public MainForm()
        {
            InitializeComponent();
            label1.BackColor = color1;
            label2.BackColor = color1;
            label3.BackColor = color1;
        }

        Color color1 = Color.Aqua;
        Color color2 = Color.Pink;


        void toggleLabel(System.Windows.Forms.Label myLabel)
        {
            if (myLabel.BackColor == color1)
                myLabel.BackColor = color2;
            else
                myLabel.BackColor = color1;
        }

        // syncronous (normal) call to regular (non-slow) service
        private void button1_Click(object sender, EventArgs e)
        {
            com.harbormist.Quote myQuoteService =
                new com.harbormist.Quote();
            textBox1.Text = myQuoteService.GetQuote();
            toggleLabel(label1);
        }

        // syncronous (normal) call to slow service (2-second delay)
        private void button2_Click(object sender, EventArgs e)
        {
            com.harbormist.slow.Quote mySlowQuoteService =
                new com.harbormist.slow.Quote();
            textBox1.Text = mySlowQuoteService.GetQuote();
            toggleLabel(label2);
        }

        // Asyncronous ("fire and forget") call to slow service (2-second delay)
        //   returns control to GUI immediately; service calls back later with answer
        private void button3_Click(object sender, EventArgs e)
        {
            com.harbormist.slow.Quote mySlowQuoteService =
                new com.harbormist.slow.Quote();
            mySlowQuoteService.GetQuoteCompleted +=
                new com.harbormist.slow.GetQuoteCompletedEventHandler(GetAnswer);
            mySlowQuoteService.GetQuoteAsync();
            toggleLabel(label3);

        }

        // the callback method for the async call
        void GetAnswer(object sender,
            com.harbormist.slow.GetQuoteCompletedEventArgs e)
        {
            String myQuote = e.Result;
            textBox1.Text = myQuote;
        }


    }
}