/*=============================================================================
  
  Project:   SharpImage
  Module:    siFormVariableSlider.cs
  Language:  C#
  Author:    Dan Mueller
  Date:      $Date: 2007-07-06 10:57:00 +1000 (Fri, 06 Jul 2007) $
  Revision:  $Revision: 2 $

  Copyright (c) Queensland University of Technology (QUT) 2007.
  All rights reserved.

  This software is distributed WITHOUT ANY WARRANTY; without even
  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  PURPOSE.  See the above copyright notices for more information.
  
=============================================================================*/

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

using SharpImage.Rendering;

namespace SharpImage.Forms
{
    public partial class siFormVariableSlider : siFormTool
    {
        #region siSliderVariable Struct
        //=====================================================================
        private struct siSliderVariable
        {
            private string m_Name;
            private double m_Default;
            private double m_Minimum;
            private double m_Maximum;
            private double m_Increment;
            
            /// <summary>
            /// Default constructor.
            /// </summary>
            /// <param name="name"></param>
            /// <param name="defaultvalue"></param>
            /// <param name="min"></param>
            /// <param name="max"></param>
            /// <param name="inc"></param>
            public siSliderVariable(string name, double defaultvalue, double min, double max, double inc)
            {
                m_Name = name;
                m_Default = defaultvalue;
                m_Minimum = min;
                m_Maximum = max;
                m_Increment = inc;
            }

            /// <summary>
            /// Gets/sets the name of the slider variable.
            /// </summary>
            public string Name
            {
                get { return this.m_Name; }
                set { this.m_Name = value; }
            }

            /// <summary>
            /// Gets/sets the default value of the slider variable.
            /// </summary>
            public double Default
            {
                get { return this.m_Default; }
                set { this.m_Default = value; }
            }

            /// <summary>
            /// Gets/sets the minimum value of the slider variable.
            /// </summary>
            public double Minimum
            {
                get { return this.m_Minimum; }
                set { this.m_Minimum = value; }
            }

            /// <summary>
            /// Gets/sets the maximum value of the slider variable.
            /// </summary>
            public double Maximum
            {
                get { return this.m_Maximum; }
                set { this.m_Maximum = value; }
            }

            /// <summary>
            /// Gets/sets the increment of the slider variable.
            /// </summary>
            public double Increment
            {
                get { return this.m_Increment; }
                set { this.m_Increment = value; }
            }
        }
        //=====================================================================
        #endregion
        
        #region Construction and Disposal
        //=====================================================================
        /// <summary>
        /// Default constructor
        /// </summary>
        /// <param name="input">The input to apply the variables to.</param>
        public siFormVariableSlider(itk.itkImageBase input)
        {
            // Init component
            InitializeComponent();

            // Set member info
            this.Input = input;

            // Hide all the scrollbars and labels
            this.SetNumberOfVariables(0);
        }
        //=====================================================================
        #endregion

        #region Properties
        //=====================================================================
        private bool IgnoreScrollEvents = false;
        private itk.itkImageBase Input;
        private Dictionary<string, double> m_CurrentValues = new Dictionary<string, double>();
        private Dictionary<string, siSliderVariable> m_VariableInfo = new Dictionary<string, siSliderVariable>();
        private string m_ValueStringFormat = "000.00";

        /// <summary>
        /// Gets the current value of the variable (accessed by name).
        /// </summary>
        public double this[string name]
        {
            get { return this.m_CurrentValues[name]; }
        }

        /// <summary>
        /// Gets the current value of the variable (accessed by name).
        /// </summary>
        public Dictionary<string, double> CurrentValues
        {
            get { return this.m_CurrentValues; }
        }

        /// <summary>
        /// Gets the default value of the variable (accessed by name).
        /// </summary>
        private Dictionary<string, siSliderVariable> VariableInfo
        {
            get { return this.m_VariableInfo; }
        }

        /// <summary>
        /// Gets the number of variables added to this form.
        /// </summary>
        public int NumberOfVariables
        {
            get { return this.VariableInfo.Count; }
        }

        /// <summary>
        /// Gets if the function should be applied in-place or should
        /// create a new renderer.
        /// </summary>
        public bool ApplyInPlace
        {
            get { return this.radioInPlace.Checked; }
        }

        /// <summary>
        /// Get/set the formatting string for the variable values.
        /// Eg. "000.00" or "000" or "". Default = "000.00".
        /// </summary>
        public string ValueStringFormat
        {
            get { return this.m_ValueStringFormat; }
            set { this.m_ValueStringFormat = value; }
        }
        //=====================================================================
        #endregion

        #region Events and Delegates
        //=====================================================================
        public delegate void VariableChangedHandler(string name, Dictionary<string, double> values);
        private VariableChangedHandler m_EventStorage_VariableChanged;

        /// <summary>
        /// An event raised when a variable value is changed.
        /// </summary>
        public event VariableChangedHandler VariableChanged
        {
            add { this.m_EventStorage_VariableChanged += value; }
            remove { this.m_EventStorage_VariableChanged -= value; }
        }

        /// <summary>
        /// Raise the VariableChanged event using this.CurrentValues.
        /// </summary>
        /// <param name="name">The name of variable which was last changed</param>
        protected void RaiseVariableChanged(string name)
        {
            // Fire event
            if (this.m_EventStorage_VariableChanged != null)
            {
                this.m_EventStorage_VariableChanged(name, this.CurrentValues);
                this.UpdateFormFromCurrentVariables();
            }
        }
        //=====================================================================
        #endregion

        #region Public Methods
        //=====================================================================
        /// <summary>
        /// Add a variable to the form.
        /// </summary>
        /// <param name="name"></param>
        /// <param name="defaultValue"></param>
        /// <param name="min"></param>
        /// <param name="max"></param>
        /// <param name="inc"></param>
        public void AddVariable(string name, double defaultValue, double min, double max, double inc)
        {
            siSliderVariable var = new siSliderVariable(name, defaultValue, min, max, inc);
            this.VariableInfo.Add(name, var);
            this.CurrentValues.Add(name, var.Default);
        }
        
        /// <summary>
        /// Initialise the form. This method assumes that the variables have been added and
        /// the Maximum, Minimum, Increment properties configured.
        /// </summary>
        public void Initialise()
        {
            // Signal we are ignoring scroll events
            this.IgnoreScrollEvents = true;
            
            // Show/hide scrollbars and lables
            this.SetNumberOfVariables(this.VariableInfo.Count);

            // Setup Minimum, Maximum, Increment
            int index = 1;
            foreach (siSliderVariable var in this.VariableInfo.Values)
            {
                // Set minimum and maximum
                HScrollBar scroll = this.GetVariableScrollBar(index);
                scroll.Minimum = 0;
                scroll.Maximum = (int)Math.Ceiling((var.Maximum - var.Minimum) / var.Increment);

                // Set default value
                scroll.Value = (int)Math.Ceiling((var.Default - var.Minimum) / var.Increment);

                // Set tag
                scroll.Tag = var.Name;

                // Set default label
                Label label = this.GetVariableLabel(index);
                label.Text = var.Name + ":  " + var.Default.ToString(this.ValueStringFormat);
                label.Invalidate();
                label.Refresh();
                
                // Increment index
                index++;
            }

            // Signal we are ignoring scroll events
            this.IgnoreScrollEvents = false;
        }

        /// <summary>
        /// Reset the values to their default settings. 
        /// </summary>
        public void Reset()
        {
            // Signal we are ignoring scroll events
            this.IgnoreScrollEvents = true;
            
            int index = 1;
            foreach (siSliderVariable var in this.VariableInfo.Values)
            {
                // Update current value
                HScrollBar scroll = this.GetVariableScrollBar(index);
                scroll.Value = (int)((var.Default - var.Minimum) / var.Increment);
                this.CurrentValues[var.Name] = var.Default;

                // Update label
                Label label = this.GetVariableLabel(index);
                label.Text = var.Name + ":  " + var.Default.ToString(this.ValueStringFormat);
                label.Invalidate();
                label.Refresh();

                // Increment index
                index++;
            }

            // Raise the event
            this.RaiseVariableChanged(this.CurrentValues.Keys.GetEnumerator().Current);

            // Signal we are ignoring scroll events
            this.IgnoreScrollEvents = false;
        }

        public void OnRendererClosed(siRenderer renderer, EventArgs e)
        {
            // Close this form
            this.Close();
        }
        //=====================================================================
        #endregion

        #region Private Methods
        //=====================================================================
        private void cmdReset_Click(object sender, EventArgs e)
        {
            this.Reset();
        }

        private void scrollVariable_ValueChanged(object sender, EventArgs e)
        {
            // Check if we are ignoring scroll events
            if (this.IgnoreScrollEvents)
                return;

            // Update current variables
            this.UpdateCurrentVariablesFromForm();

            // Raise the event
            this.RaiseVariableChanged((string)(sender as HScrollBar).Tag);
        }

        private void UpdateCurrentVariablesFromForm()
        {
            int index = 1;
            foreach (siSliderVariable var in this.VariableInfo.Values)
            {
                // Update current value
                HScrollBar scroll = this.GetVariableScrollBar(index);
                double newValue = ((double)scroll.Value * var.Increment) + var.Minimum;
                this.CurrentValues[var.Name] = newValue;

                // Update label
                Label label = this.GetVariableLabel(index);
                label.Text = var.Name + ":  " + newValue.ToString(this.ValueStringFormat);
                label.Invalidate();
                label.Refresh();

                // Increment index
                index++;
            }        
        }

        private void UpdateFormFromCurrentVariables()
        {
            int index = 1;
            foreach (siSliderVariable var in this.VariableInfo.Values)
            {
                // Update current value
                HScrollBar scroll = this.GetVariableScrollBar(index);
                scroll.Value = (int)((this.CurrentValues[var.Name] - var.Minimum) / var.Increment);

                // Update label
                Label label = this.GetVariableLabel(index);
                label.Text = var.Name + ":  " + this.CurrentValues[var.Name].ToString(this.ValueStringFormat);
                label.Invalidate();
                label.Refresh();

                // Increment index
                index++;
            }
        }
        private void scrollVariable_Scroll(object sender, ScrollEventArgs e)
        {
            
        }   
 
        private HScrollBar GetVariableScrollBar(int index)
        {
            switch (index)
            {
                case 1:
                    return this.scrollVariable1;
                case 2:
                    return this.scrollVariable2;
                case 3:
                    return this.scrollVariable3;
                case 4:
                    return this.scrollVariable4;
                case 5:
                    return this.scrollVariable5;
                case 6:
                    return this.scrollVariable6;
                case 7:
                    return this.scrollVariable7;
                case 8:
                    return this.scrollVariable8;
                default:
                    throw new ArgumentOutOfRangeException("Index", index, "The total number of variables supported by siFormVariableSlider is 8.");
            }
        }

        private Label GetVariableLabel(int index)
        {
            switch (index)
            {
                case 1:
                    return this.lblVariable1;
                case 2:
                    return this.lblVariable2;
                case 3:
                    return this.lblVariable3;
                case 4:
                    return this.lblVariable4;
                case 5:
                    return this.lblVariable5;
                case 6:
                    return this.lblVariable6;
                case 7:
                    return this.lblVariable7;
                case 8:
                    return this.lblVariable8;
                default:
                    throw new ArgumentOutOfRangeException("Index", index, "The total number of variables supported by siFormVariableSlider is 8.");
            }
        }        
        /// <summary>
        /// Sets the number of sliders and labels shown on the GUI.
        /// </summary>
        /// <param name="count"></param>
        private void SetNumberOfVariables(int count)
        {
            switch (count)
            {
                case 0:
                    #region Hide/show Scrollbars and Labels
                    this.scrollVariable1.Visible = false;
                    this.scrollVariable2.Visible = false;
                    this.scrollVariable3.Visible = false;
                    this.scrollVariable4.Visible = false;
                    this.scrollVariable5.Visible = false;
                    this.scrollVariable6.Visible = false;
                    this.scrollVariable7.Visible = false;
                    this.scrollVariable8.Visible = false;
                    this.lblVariable1.Visible = false;
                    this.lblVariable2.Visible = false;
                    this.lblVariable3.Visible = false;
                    this.lblVariable4.Visible = false;
                    this.lblVariable5.Visible = false;
                    this.lblVariable6.Visible = false;
                    this.lblVariable7.Visible = false;
                    this.lblVariable8.Visible = false;
                    #endregion
                    break;
                case 1:
                    #region Hide/show Scrollbars and Labels
                    this.scrollVariable1.Visible = true;
                    this.scrollVariable2.Visible = false;
                    this.scrollVariable3.Visible = false;
                    this.scrollVariable4.Visible = false;
                    this.scrollVariable5.Visible = false;
                    this.scrollVariable6.Visible = false;
                    this.scrollVariable7.Visible = false;
                    this.scrollVariable8.Visible = false;
                    this.lblVariable1.Visible = true;
                    this.lblVariable2.Visible = false;
                    this.lblVariable3.Visible = false;
                    this.lblVariable4.Visible = false;
                    this.lblVariable5.Visible = false;
                    this.lblVariable6.Visible = false;
                    this.lblVariable7.Visible = false;
                    this.lblVariable8.Visible = false;
                    #endregion
                    break;
                case 2:
                    #region Hide/show Scrollbars and Labels
                    this.scrollVariable1.Visible = true;
                    this.scrollVariable2.Visible = true;
                    this.scrollVariable3.Visible = false;
                    this.scrollVariable4.Visible = false;
                    this.scrollVariable5.Visible = false;
                    this.scrollVariable6.Visible = false;
                    this.scrollVariable7.Visible = false;
                    this.scrollVariable8.Visible = false;
                    this.lblVariable1.Visible = true;
                    this.lblVariable2.Visible = true;
                    this.lblVariable3.Visible = false;
                    this.lblVariable4.Visible = false;
                    this.lblVariable5.Visible = false;
                    this.lblVariable6.Visible = false;
                    this.lblVariable7.Visible = false;
                    this.lblVariable8.Visible = false;
                    #endregion
                    break;
                case 3:
                    #region Hide/show Scrollbars and Labels
                    this.scrollVariable1.Visible = true;
                    this.scrollVariable2.Visible = true;
                    this.scrollVariable3.Visible = true;
                    this.scrollVariable4.Visible = false;
                    this.scrollVariable5.Visible = false;
                    this.scrollVariable6.Visible = false;
                    this.scrollVariable7.Visible = false;
                    this.scrollVariable8.Visible = false;
                    this.lblVariable1.Visible = true;
                    this.lblVariable2.Visible = true;
                    this.lblVariable3.Visible = true;
                    this.lblVariable4.Visible = false;
                    this.lblVariable5.Visible = false;
                    this.lblVariable6.Visible = false;
                    this.lblVariable7.Visible = false;
                    this.lblVariable8.Visible = false;
                    #endregion
                    break;
                case 4:
                    #region Hide/show Scrollbars and Labels
                    this.scrollVariable1.Visible = true;
                    this.scrollVariable2.Visible = true;
                    this.scrollVariable3.Visible = true;
                    this.scrollVariable4.Visible = true;
                    this.scrollVariable5.Visible = false;
                    this.scrollVariable6.Visible = false;
                    this.scrollVariable7.Visible = false;
                    this.scrollVariable8.Visible = false;
                    this.lblVariable1.Visible = true;
                    this.lblVariable2.Visible = true;
                    this.lblVariable3.Visible = true;
                    this.lblVariable4.Visible = true;
                    this.lblVariable5.Visible = false;
                    this.lblVariable6.Visible = false;
                    this.lblVariable7.Visible = false;
                    this.lblVariable8.Visible = false;
                    #endregion
                    break;
                case 5:
                    #region Hide/show Scrollbars and Labels
                    this.scrollVariable1.Visible = true;
                    this.scrollVariable2.Visible = true;
                    this.scrollVariable3.Visible = true;
                    this.scrollVariable4.Visible = true;
                    this.scrollVariable5.Visible = true;
                    this.scrollVariable6.Visible = false;
                    this.scrollVariable7.Visible = false;
                    this.scrollVariable8.Visible = false;
                    this.lblVariable1.Visible = true;
                    this.lblVariable2.Visible = true;
                    this.lblVariable3.Visible = true;
                    this.lblVariable4.Visible = true;
                    this.lblVariable5.Visible = true;
                    this.lblVariable6.Visible = false;
                    this.lblVariable7.Visible = false;
                    this.lblVariable8.Visible = false;
                    #endregion
                    break;
                case 6:
                    #region Hide/show Scrollbars and Labels
                    this.scrollVariable1.Visible = true;
                    this.scrollVariable2.Visible = true;
                    this.scrollVariable3.Visible = true;
                    this.scrollVariable4.Visible = true;
                    this.scrollVariable5.Visible = true;
                    this.scrollVariable6.Visible = true;
                    this.scrollVariable7.Visible = false;
                    this.scrollVariable8.Visible = false;
                    this.lblVariable1.Visible = true;
                    this.lblVariable2.Visible = true;
                    this.lblVariable3.Visible = true;
                    this.lblVariable4.Visible = true;
                    this.lblVariable5.Visible = true;
                    this.lblVariable6.Visible = true;
                    this.lblVariable7.Visible = false;
                    this.lblVariable8.Visible = false;
                    #endregion
                    break;
                case 7:
                    #region Hide/show Scrollbars and Labels
                    this.scrollVariable1.Visible = true;
                    this.scrollVariable2.Visible = true;
                    this.scrollVariable3.Visible = true;
                    this.scrollVariable4.Visible = true;
                    this.scrollVariable5.Visible = true;
                    this.scrollVariable6.Visible = true;
                    this.scrollVariable7.Visible = true;
                    this.scrollVariable8.Visible = false;
                    this.lblVariable1.Visible = true;
                    this.lblVariable2.Visible = true;
                    this.lblVariable3.Visible = true;
                    this.lblVariable4.Visible = true;
                    this.lblVariable5.Visible = true;
                    this.lblVariable6.Visible = true;
                    this.lblVariable7.Visible = true;
                    this.lblVariable8.Visible = false;
                    #endregion
                    break;
                case 8:
                    #region Hide/show Scrollbars and Labels
                    this.scrollVariable1.Visible = true;
                    this.scrollVariable2.Visible = true;
                    this.scrollVariable3.Visible = true;
                    this.scrollVariable4.Visible = true;
                    this.scrollVariable5.Visible = true;
                    this.scrollVariable6.Visible = true;
                    this.scrollVariable7.Visible = true;
                    this.scrollVariable8.Visible = true;
                    this.lblVariable1.Visible = true;
                    this.lblVariable2.Visible = true;
                    this.lblVariable3.Visible = true;
                    this.lblVariable4.Visible = true;
                    this.lblVariable5.Visible = true;
                    this.lblVariable6.Visible = true;
                    this.lblVariable7.Visible = true;
                    this.lblVariable8.Visible = true;
                    #endregion
                    break;
                default:
                    throw new ArgumentOutOfRangeException("NumberOfVariables", count, "The total number of variables supported by this form is 8.");
            }
        }
        //=====================================================================
        #endregion        
    }
}