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Designer centric Wizard control

, 15 Dec 2004
A Wizard control designed for design time development.
using System;
using System.Collections;
using System.Windows.Forms;

namespace Gui.Wizard
{
	/// <summary>
	/// Summary description for PanelCollection.
	/// </summary>
	public class PageCollection : CollectionBase
	{
		private Wizard vParent;
		/// <summary>
		/// Constructor requires the  wizard that owns this collection
		/// </summary>
		/// <param name="parent">Wizard</param>
		public PageCollection(Wizard parent):base()
		{
			vParent = parent;
		}

		/// <summary>
		/// Returns the wizard that owns this collection
		/// </summary>
		public Wizard Parent
		{
			get 
			{
				return vParent;
			}
		}

		/// <summary>
		/// Finds the Page in the collection
		/// </summary>
		public WizardPage this[ int index ]  
		{
			get  
			{
				return( (WizardPage) List[index] );
			}
			set  
			{
				List[index] = value;
			}
		}


		/// <summary>
		/// Adds a WizardPage into the Collection
		/// </summary>
		/// <param name="value">The page to add</param>
		/// <returns></returns>
		public int Add(WizardPage value )  
		{		
			int result = List.Add( value );
			return result;
		}


		/// <summary>
		/// Adds an array of pages into the collection. Used by the Studio Designer generated coed
		/// </summary>
		/// <param name="pages">Array of pages to add</param>
		public void AddRange(WizardPage[] pages)
		{
			// Use external to validate and add each entry
			foreach(WizardPage page in pages)
			{
				this.Add(page);
			}
		}

		/// <summary>
		/// Finds the position of the page in the colleciton
		/// </summary>
		/// <param name="value">Page to find position of</param>
		/// <returns>Index of Page in collection</returns>
		public int IndexOf( WizardPage value )  
		{
			return( List.IndexOf( value ) );
		}

		/// <summary>
		/// Adds a new page at a particular position in the Collection
		/// </summary>
		/// <param name="index">Position</param>
		/// <param name="value">Page to be added</param>
		public void Insert( int index, WizardPage value )  
		{
			List.Insert(index, value );
		}


		/// <summary>
		/// Removes the given page from the collection
		/// </summary>
		/// <param name="value">Page to remove</param>
		public void Remove( WizardPage value )  
		{
			//Remove the item
			List.Remove( value );
		}

		/// <summary>
		/// Detects if a given Page is in the Collection
		/// </summary>
		/// <param name="value">Page to find</param>
		/// <returns></returns>
		public bool Contains( WizardPage value )  
		{
			// If value is not of type Int16, this will return false.
			return( List.Contains( value ) );
		}

		/// <summary>
		/// Propgate when a external designer modifies the pages
		/// </summary>
		/// <param name="index"></param>
		/// <param name="value"></param>
		protected override void OnInsertComplete(int index, object value)
		{
			base.OnInsertComplete (index, value);
			//Showthe page added
			vParent.PageIndex = index;
		}
	
		/// <summary>
		/// Propogates when external designers remove items from page
		/// </summary>
		/// <param name="index"></param>
		/// <param name="value"></param>
		protected override void OnRemoveComplete(int index, object value)
		{
			base.OnRemoveComplete (index, value);
			//If the page that was added was the one that was visible
			if (vParent.PageIndex == index)
			{
				//Can I show the one after
				if (index < InnerList.Count)
				{
					vParent.PageIndex = index;
				}
				else
				{
					//Can I show the end one (if not -1 makes everythign disappear
					vParent.PageIndex = InnerList.Count-1;
				}
			}
		}

	}
}

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License

This article, along with any associated source code and files, is licensed under The Microsoft Public License (Ms-PL)

About the Author

Al Gardner
Software Developer (Senior)
United Kingdom United Kingdom
** Apologies but my daughter was born in October 2004, and so coding now comes second. My reponses tend to take a lot longer**
 
I've been coding since I got my first ZX Spectrum. From Basic to assembly, through C,C++ and arriving at C#. On the way I've throughly enjoyed Perl, Lisp and XML.
 
I find I can make the intellectual leap to understand the problem, I love big picture designs, patterns and reuse. I may be addicted to abstract classes Smile | :) GOF has a lot to answer for. I miss delete() even though I spent too much time finding the leaks.
 
My favourite part of coding is in UI design because of the complexity, the event driven nature, and the fact its (virtually) tactile. I hate GUI's that don't follow system guidelines, don't resize, and don't display properly when you change system colour and font.

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