CourseVectorBase.cs :  » Network-Clients » iReaper » IReaper » CourseData » C# / CSharp Open Source

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Text;
using System.ComponentModel;
using IReaper.Category;

namespace IReaper.CourseData{
    public abstract class CourseVectorBase:IVector<Course>
    {
        static List<CourseVectorBase> list = new List<CourseVectorBase>();
        protected CourseCollection all;
        protected IWebcastNode<Course> node;

        protected CourseVectorBase(CourseCollection courses)
        {
            this.all = courses;
        }

        //
        protected abstract void AddCourse(Course course);
        
        /// <summary>
        /// 
        /// </summary>
        /// <param name="course"></param>
        protected abstract void RemoveCourse(Course course);

        /// <summary>
        /// 
        /// </summary>
        private void RefreshVector()
        {
            int i = 0;
            if (node != null)
                node.SetRoot(this.all);
            for (i = 0; i < this.all.Count; i++)//this.allCoursesCollection
            {
                Course course = this.all[i];
                this.AddCourse(course);
            }
        }

        public void SetWebcastNode(IWebcastNode<Course> Node)
        {
            this.node = Node;
            if (this.all != null)
                this.all.ResetBindings();
        }
        /// <summary>
        /// 
        /// NotifyRemove
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void DataChanged(object sender, System.ComponentModel.ListChangedEventArgs e)
        {
            if (e.ListChangedType == ListChangedType.ItemAdded)
            {
                Course course = this.all[e.NewIndex];
                this.AddCourse(course);
            }
            else if (e.ListChangedType == ListChangedType.Reset)
            {
                this.RefreshVector();
            }
        }

        private void NotifyRemove(int index)
        {
            Course course = this.all[index];
            this.RemoveCourse(course);
        }
        
        /// <summary>
        /// CoursesCollection
        /// </summary>
        internal static CourseVectorBase GetCoursVector(CourseCollection courses)
        {
            CourseVectorBase vector = new CourseCategoryVector(courses);
            courses.ListChanged += vector.DataChanged;
            courses.NotifyRemove += vector.NotifyRemove;
            list.Add(vector);
            return vector;
        }

        public static void RefreshAll()
        {
            foreach (CourseCategoryVector vector in list)
            {
                vector.RefreshVector();
            }
        }
    }
}