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

namespace ClabGui
{

    /// <summary>
    /// Partial GUI class for drawing a variable and it's domains.
    /// </summary>
    public partial class VarParaGui : UserControl
    {
        private MainGui mainGui;
        private int id;
        private int selectedIndex = -1;
        private Hashtable valueToComboIndex;
        private StringComparer stringComparer;
        private VarParameters varParameters;
        private Boolean allowIndexChangedEvent = true;

        /// <summary>
        /// Initializes a new instance of the <see cref="T:VarParaGui"/> class.
        /// </summary>
        /// <param name="mainGui">The <see cref="T:MainGui"></see>.</param>
        /// <param name="id">The variable id.</param>
        /// <param name="varName">Name of the variable.</param>
        /// <param name="domainV">The domain values.</param>
        public VarParaGui(MainGui mainGui, int id, String varName, List<String> domainV)
        {
            stringComparer = StringComparer.Create(System.Globalization.CultureInfo.CurrentCulture, true);
            valueToComboIndex = new Hashtable(stringComparer);
            this.mainGui = mainGui;
            this.id = id;
            varParameters = new VarParameters(domainV);
            InitializeComponent();
            this.varName.Text = varName;
            domainVCombo.DrawItem += new System.Windows.Forms.DrawItemEventHandler(this.domainVCombo_DrawItem);

            for (int i = 0; i < domainV.Count; i++)
            {
                domainVCombo.Items.Add(domainV[i]);
                valueToComboIndex[domainV[i]] = i;
            }
        }

        private void domainVCombo_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (allowIndexChangedEvent && domainVCombo.SelectedIndex != -1)
            {
                String selected = (String)domainVCombo.SelectedItem;
                if ( varParameters.GetStatus(selected) == ParameterBitmapSingleton.AVAILABLE)
                {
                    Boolean clabNotFinnished = mainGui.RunValueChosenSearch(id, selected);
                    if (!clabNotFinnished)
                    {
                        varParameters.UserSelectedVal(selected);
                        selectedIndex = domainVCombo.SelectedIndex;
                        allowIndexChangedEvent = false;
                    }
                    else
                    {
                        domainVCombo.SelectedIndex = -1;
                    }
                }
            }
            if (selectedIndex != -1 && domainVCombo.SelectedIndex != selectedIndex)
            {
                domainVCombo.SelectedIndex = selectedIndex;
            }
        }

        /// <summary>
        /// Updates the domain values with the new valid domains.
        /// </summary>
        /// <param name="validDomainValues">The valid domain values.</param>
        public void UpdateDomainValues(List<String> validDomainValues)
        {
            varParameters.ValidDomainVals(validDomainValues);
            if (validDomainValues.Count == 1)
            {
                String val = validDomainValues[0];
                int index = (int)valueToComboIndex[val];
                selectedIndex = index;
                domainVCombo.SelectedIndex = index;
            }
        }

        private void domainVCombo_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
        {
            Graphics g = e.Graphics ;
            Font fn = null ;
            
            if (e.Index >= 0)
            {
                int offset = 1;
                fn = (Font)new Font("Arial", 10, FontStyle.Regular);
                string s = (string)domainVCombo.Items[e.Index];

                // Set the string format options
                StringFormat sf = new StringFormat();
                sf.Alignment = StringAlignment.Near;

                // Draw the rectangle
                RectangleF itemRect = new RectangleF((float)(e.Bounds.X + 16 + offset), (float)(e.Bounds.Y), (float)(e.Bounds.Width - 16 - offset), (float)(e.Bounds.Height));
                
                if (e.State == (DrawItemState.NoAccelerator | DrawItemState.NoFocusRect))
                {
                    // if the item is not selected draw it with a different color 
                    e.Graphics.FillRectangle(new SolidBrush(Color.White), itemRect);
                    e.Graphics.DrawString(s, fn, new SolidBrush(Color.Black), itemRect, sf);
                    e.DrawFocusRectangle();
                }
                else
                {
                    //Bitmap ImageToDraw = new Bitmap(test, e.Bounds.Height - 1, e.Bounds.Height - 1);
                    Bitmap statusBitmap = varParameters.GetDomainValBitmap(s);

                    Bitmap ImageToDraw = new Bitmap(statusBitmap, e.Bounds.Height - 1, e.Bounds.Height - 1);
                    e.Graphics.DrawString(s, fn, new SolidBrush(Color.Black), itemRect, sf);
                    Rectangle imageRect = new Rectangle(e.Bounds.X + offset, e.Bounds.Y, 16, 16);
                    e.Graphics.DrawImage(ImageToDraw, imageRect);
		
                    // if the item is selected draw it with a different color
                    //e.Graphics.FillRectangle(new SolidBrush(Color.LightBlue), r);
                    //e.Graphics.DrawString(s, fn, new SolidBrush(Color.Red), r, sf);
                    e.DrawFocusRectangle();
                    
                }
            }
        }
    }
}