using System;
using System.Drawing;
using System.Windows.Forms;

namespace TracingDB.Forms
{
    public partial class ModelessForm : Form
    {
        /// <summary>
        /// Called from the state machine when an operation forces a modeless dialog close.
        /// </summary>
        public static void UpdateMessage(MessageEventArgs args)
        {
            if (UpdateMessageHandler == null) return;
            try { UpdateMessageHandler(null, args); }
            catch (Exception) { }
        }
        public static event EventHandler<MessageEventArgs> UpdateMessageHandler;

        void OnUpdateMessage(object sender, MessageEventArgs args)
        {
            Message = args.Message;
            if (Message != null) label1.Text = Message;
        }


        /// <summary>
        /// Called from the state machine when an operation forces a modeless dialog close.
        /// </summary>
        public static void CloseForm()
        {
            if (CloseFormHandler == null) return;
            try { CloseFormHandler(null, null); }
            catch (Exception) { }
        }
        public static event EventHandler<EventArgs> CloseFormHandler;

        void OnCloseForm(object sender, EventArgs args)
        {
            DialogResult = DialogResult.Cancel;
            Close();
        }


        public string Title;
        public string Message;
        public Color BackgroundColor;
        public Color TextColor;
        public Font TextFont;
        public string FontFamily;
        public int FontSize;
        public FontStyle FontStyle;


        /// <summary>
        /// Constructor to be used by the application
        /// </summary>
        /// <param name="title">Window title</param>
        /// <param name="message">Displayed message</param>
        public ModelessForm()
        {
            InitializeComponent();
            ControlBox = false;

            UpdateMessageHandler += delegate(object sender, MessageEventArgs args)
            {
                if (InvokeRequired) { Invoke(new EventHandler<MessageEventArgs>(OnUpdateMessage), sender, args); }
                else OnUpdateMessage(sender, args);
            };

            CloseFormHandler += delegate(object sender, EventArgs args)
            {
                if (InvokeRequired) { Invoke(new EventHandler<EventArgs>(OnCloseForm), sender, args); }
                else OnCloseForm(sender, args);
            };
        }

        private void ModelessForm_Load(object sender, EventArgs e)
        {
            if (Title != null) Text = Title;
            if (Message != null) label1.Text = Message;
            if (BackgroundColor != null) BackColor = BackgroundColor;
            if (TextColor != null) ForeColor = TextColor;
            if (FontFamily != null) label1.Font = new Font(FontFamily, FontSize, FontStyle);

            float textWidth = Graphics.FromImage(new Bitmap(1, 1)).MeasureString(label1.Text, label1.Font).Width;
            float textHeight = Graphics.FromImage(new Bitmap(1, 1)).MeasureString(label1.Text, label1.Font).Height;
            Width = (int)textWidth + 120;		/// Form width calculated from the text width
            Height += (int)textHeight;		    /// Form height calculated from the text height
        }
    }
}