Shopping - A .NET shopping application for Pocket PC

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Xml;

using McSoft.UILib;
using Shopping.Engine;

namespace Shopping
{
	/// <summary>
	/// Summary description for frmEdit.
	/// </summary>
	public class frmEdit : System.Windows.Forms.Form
	{
		private const int TABCONTROL_ORIGINAL_HEIGHT = 270;

		private Microsoft.WindowsCE.Forms.InputPanel inputPanel1;
		private System.Windows.Forms.MainMenu mainMenu1;	

		private McSoft.UILib.AbcCategories mCategories;
		private Line HeaderLine;

		private McSoft.UILib.HyperlinkButton mLnkProducts;
		private System.Windows.Forms.ImageList imgToolbar;
		private McSoft.UILib.HyperlinkButton mLnkUnits;
		
		private ArrayList mAllProducts = new ArrayList(0);
		private System.Windows.Forms.TabControl tabControl1;
		private System.Windows.Forms.Label lblQty;
		private System.Windows.Forms.NumericUpDown numQty;
		private System.Windows.Forms.ListBox lstProducts;
		private System.Windows.Forms.TextBox txtNote;
		private System.Windows.Forms.TabPage tabEditor;
		private System.Windows.Forms.TabPage tabNotes;
		private System.Windows.Forms.ToolBar toolBar1;
		private System.Windows.Forms.ToolBarButton btnOK;
		private System.Windows.Forms.ToolBarButton btnCancel;
		private System.Windows.Forms.ComboBox cboUnits;
		private CartItem mNewCartItem = null;
	
		public frmEdit(CartItem itm)
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();		

			//Creates and Initialize AbcCategories
			mCategories = new AbcCategories();
			mCategories.Parent = tabEditor;
			mCategories.Bounds = new Rectangle(0, 0, 246, 16);
			mCategories.CategoryChanged += new CategoryChangedEventHandler(mCategories_CategoryChanged);

			HeaderLine = new Line();
			HeaderLine.ForeColor = Color.Gray;
			HeaderLine.Bounds = new Rectangle(0, 17, 246, 1);
			HeaderLine.Parent = tabEditor;

			//Creates and Initialize Products links
			mLnkProducts = new HyperlinkButton();
			mLnkProducts.Parent = tabEditor;
			mLnkProducts.Bounds = new Rectangle(4, 26, 48, 16);
			mLnkProducts.Text = "Products";
			mLnkProducts.ForeColor = Color.MidnightBlue;
			mLnkProducts.Click += new EventHandler(mLnkProducts_Click);

			//Creates and Initialize Units links
			mLnkUnits = new HyperlinkButton();
			mLnkUnits.Parent = tabEditor;
			mLnkUnits.Bounds = new Rectangle(4, 149, 48, 16);
			mLnkUnits.Text = "Units";
			mLnkUnits.ForeColor = Color.MidnightBlue;
			mLnkUnits.Click += new EventHandler(mLnkUnits_Click);
			
			LoadProducts();
			FilterProducts("A");  //Initially we do not apply any filter
			LoadUnits();
			if(itm != null) LoadCurrentData(itm);
		}

		/// <summary>
		/// Cart created by editor
		/// </summary>
		public CartItem NewCartItem
		{
			get{return mNewCartItem;}
		}

		/// <summary>
		/// Load a CartItem into GUI.
		/// </summary>
		/// <param name="itm"></param>
		private void LoadCurrentData(CartItem itm)
		{
			int idx = 0;
			foreach(string currentItm in lstProducts.Items)
			{
				if(currentItm == itm.Name)
				{
					lstProducts.SelectedIndex = idx;
					lstProducts.TopIndex = idx;
				}
				idx ++;
			}

			numQty.Text = itm.Quantity.ToString();
			numQty.Value = itm.Quantity;
			cboUnits.Text = itm.Format;
			txtNote.Text = itm.Note;
		}

		/// <summary>
		/// Load available formats into combobox
		/// </summary>
		private void LoadUnits()
		{
			cboUnits.Items.Clear();									

			ArrayList items = ShoppingApp.GetUnits();
			
			foreach(string elem in items)
			{
				cboUnits.Items.Add(elem);
			}
	
			if( !cboUnits.Items.Contains(CST.NO_DEFAULT) )
				cboUnits.Items.Add(CST.NO_DEFAULT);
		}

		/// <summary>
		/// Load available products into combo
		/// </summary>
		private void LoadProducts()
		{	
			if(System.IO.File.Exists(CST.XMLPRODUCTS))
			{
				XmlDocument doc = new XmlDocument();
				doc.Load(CST.XMLPRODUCTS);

				mAllProducts = new ArrayList(doc.DocumentElement.ChildNodes.Count);
				
				foreach(XmlElement elem in doc.DocumentElement)
				{
					Product product = new Product(elem.GetAttribute("Name"), 
						elem.HasAttribute("DefaultFormat") ? elem.GetAttribute("DefaultFormat") : string.Empty);
					mAllProducts.Add(product);												
				}		
				
				IComparer myComparer = new ProductsComparer();
				mAllProducts.Sort(myComparer);	
			}		
		}
		

		/// <summary>
		/// Filter the list 
		/// </summary>		
		private void FilterProducts(string filter)
		{
			if(filter == "A")
			{
				if(lstProducts.Items.Count != mAllProducts.Count)
				{
					lstProducts.Items.Clear();

					foreach(Product product in mAllProducts)
					{
						lstProducts.Items.Add(product.Name);
					}
				}
			}
			else
			{
				lstProducts.Items.Clear();	
				foreach(Product product in mAllProducts)
				{		
					if(product.Name.Substring(0,1).ToLower().CompareTo(filter.ToLower()) >= 0)
						lstProducts.Items.Add(product.Name);				
				}
			}			
		}


		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			base.Dispose( disposing );
		}
	

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(frmEdit));
			this.inputPanel1 = new Microsoft.WindowsCE.Forms.InputPanel();
			this.mainMenu1 = new System.Windows.Forms.MainMenu();
			this.imgToolbar = new System.Windows.Forms.ImageList();
			this.tabControl1 = new System.Windows.Forms.TabControl();
			this.tabEditor = new System.Windows.Forms.TabPage();
			this.cboUnits = new System.Windows.Forms.ComboBox();
			this.lblQty = new System.Windows.Forms.Label();
			this.numQty = new System.Windows.Forms.NumericUpDown();
			this.lstProducts = new System.Windows.Forms.ListBox();
			this.tabNotes = new System.Windows.Forms.TabPage();
			this.txtNote = new System.Windows.Forms.TextBox();
			this.toolBar1 = new System.Windows.Forms.ToolBar();
			this.btnOK = new System.Windows.Forms.ToolBarButton();
			this.btnCancel = new System.Windows.Forms.ToolBarButton();
			// 
			// inputPanel1
			// 
			this.inputPanel1.EnabledChanged += new System.EventHandler(this.inputPanel1_EnabledChanged);
			// 
			// imgToolbar
			// 
			this.imgToolbar.Images.Add(((System.Drawing.Image)(resources.GetObject("resource"))));
			this.imgToolbar.Images.Add(((System.Drawing.Image)(resources.GetObject("resource1"))));
			this.imgToolbar.ImageSize = new System.Drawing.Size(16, 16);
			// 
			// tabControl1
			// 
			this.tabControl1.Controls.Add(this.tabEditor);
			this.tabControl1.Controls.Add(this.tabNotes);
			this.tabControl1.SelectedIndex = 0;
			this.tabControl1.Size = new System.Drawing.Size(240, 270);
			this.tabControl1.SelectedIndexChanged += new System.EventHandler(this.tabControl1_SelectedIndexChanged);
			// 
			// tabEditor
			// 
			this.tabEditor.Controls.Add(this.cboUnits);
			this.tabEditor.Controls.Add(this.lblQty);
			this.tabEditor.Controls.Add(this.numQty);
			this.tabEditor.Controls.Add(this.lstProducts);
			this.tabEditor.Location = new System.Drawing.Point(4, 4);
			this.tabEditor.Size = new System.Drawing.Size(232, 244);
			this.tabEditor.Text = "Editor";
			// 
			// cboUnits
			// 
			this.cboUnits.Font = new System.Drawing.Font("Tahoma", 8F, System.Drawing.FontStyle.Regular);
			this.cboUnits.Location = new System.Drawing.Point(58, 149);
			this.cboUnits.Size = new System.Drawing.Size(174, 21);
			// 
			// lblQty
			// 
			this.lblQty.Font = new System.Drawing.Font("Tahoma", 8F, System.Drawing.FontStyle.Regular);
			this.lblQty.ForeColor = System.Drawing.Color.MidnightBlue;
			this.lblQty.Location = new System.Drawing.Point(2, 126);
			this.lblQty.Size = new System.Drawing.Size(48, 16);
			this.lblQty.Text = "Quantity";
			// 
			// numQty
			// 
			this.numQty.Location = new System.Drawing.Point(58, 124);
			this.numQty.Maximum = new System.Decimal(new int[] {
																   9999,
																   0,
																   0,
																   0});
			this.numQty.Minimum = new System.Decimal(new int[] {
																   1,
																   0,
																   0,
																   0});
			this.numQty.Size = new System.Drawing.Size(174, 20);
			this.numQty.Value = new System.Decimal(new int[] {
																 1,
																 0,
																 0,
																 0});
			this.numQty.LostFocus += new System.EventHandler(this.numQty_LostFocus);
			this.numQty.GotFocus += new System.EventHandler(this.numQty_GotFocus);
			// 
			// lstProducts
			// 
			this.lstProducts.Font = new System.Drawing.Font("Tahoma", 8F, System.Drawing.FontStyle.Regular);
			this.lstProducts.Location = new System.Drawing.Point(59, 27);
			this.lstProducts.Size = new System.Drawing.Size(173, 93);
			this.lstProducts.SelectedIndexChanged += new System.EventHandler(this.lstProducts_SelectedIndexChanged);
			// 
			// tabNotes
			// 
			this.tabNotes.Controls.Add(this.txtNote);
			this.tabNotes.Location = new System.Drawing.Point(4, 4);
			this.tabNotes.Size = new System.Drawing.Size(232, 244);
			this.tabNotes.Text = "Notes";
			// 
			// txtNote
			// 
			this.txtNote.AcceptsReturn = true;
			this.txtNote.Font = new System.Drawing.Font("Tahoma", 8F, System.Drawing.FontStyle.Regular);
			this.txtNote.Multiline = true;
			this.txtNote.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
			this.txtNote.Size = new System.Drawing.Size(236, 240);
			this.txtNote.Text = "";
			this.txtNote.LostFocus += new System.EventHandler(this.txtNote_LostFocus);
			this.txtNote.GotFocus += new System.EventHandler(this.txtNote_GotFocus);
			// 
			// toolBar1
			// 
			this.toolBar1.Buttons.Add(this.btnOK);
			this.toolBar1.Buttons.Add(this.btnCancel);
			this.toolBar1.ImageList = this.imgToolbar;
			this.toolBar1.ButtonClick += new System.Windows.Forms.ToolBarButtonClickEventHandler(this.toolBar1_ButtonClick);
			// 
			// btnOK
			// 
			this.btnOK.ImageIndex = 0;
			// 
			// btnCancel
			// 
			this.btnCancel.ImageIndex = 1;
			// 
			// frmEdit
			// 
			this.ClientSize = new System.Drawing.Size(240, 294);
			this.ControlBox = false;
			this.Controls.Add(this.tabControl1);
			this.Controls.Add(this.toolBar1);
			this.MaximizeBox = false;
			this.Menu = this.mainMenu1;
			this.MinimizeBox = false;
			this.Text = "Item Editor";

		}
		#endregion

		private void mLnkProducts_Click(object sender, EventArgs e)
		{
			frmProducts editor = new frmProducts();
			editor.ShowDialog();

			LoadProducts();
			LoadUnits();
			FilterProducts(mCategories.SelectedCategory);	
		
			// Select the last added product in the list
			lstProducts.SelectedItem = editor.LastAddedItem;
		}

		private void mLnkUnits_Click(object sender, EventArgs e)
		{
			frmUnits editor = new frmUnits();
			editor.ShowDialog();

			LoadUnits();
			if(editor.LastAddedUnit != string.Empty)
				cboUnits.SelectedItem = editor.LastAddedUnit;
		}

		private void btnOK_Click()
		{
			mNewCartItem = new CartItem(lstProducts.Text, Convert.ToInt32(numQty.Value), cboUnits.Text, txtNote.Text,false);
			this.Close();
		}

		private void btnCancel_Click()
		{
			mNewCartItem = null;
			this.Close();
		}		

		private void mCategories_CategoryChanged(object sender, EventArgs e)
		{
			FilterProducts( ((ToggleCategoryButton)sender).SelectedCategory );
		}

		private void inputPanel1_EnabledChanged(object sender, System.EventArgs e)
		{		
			if (inputPanel1.Enabled == false)
			{				
				tabControl1.Height = TABCONTROL_ORIGINAL_HEIGHT;
			}
			else
			{			
				tabControl1.Height = inputPanel1.VisibleDesktop.Height;
			}
			txtNote.Height = tabNotes.Height;
		}

		private void txtNote_GotFocus(object sender, System.EventArgs e)
		{
			inputPanel1.Enabled = true;
		}

		private void txtNote_LostFocus(object sender, System.EventArgs e)
		{
			inputPanel1.Enabled = false;
		}

		private void numQty_GotFocus(object sender, System.EventArgs e)
		{
			inputPanel1.Enabled = true;
		}

		private void numQty_LostFocus(object sender, System.EventArgs e)
		{
			inputPanel1.Enabled = false;
		}

		private void tabControl1_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			if(tabControl1.SelectedIndex == 0)
			{
				lstProducts.Focus();
			}
			else
			{
				txtNote.Focus();
			}
		}

		private void toolBar1_ButtonClick(object sender, System.Windows.Forms.ToolBarButtonClickEventArgs e)
		{
			switch(toolBar1.Buttons.IndexOf(e.Button))
			{
				case 0:
					btnOK_Click();
					break;
				case 1:
					btnCancel_Click();
					break;				
			}
		}

		private void lstProducts_SelectedIndexChanged(object sender, System.EventArgs e)
		{	
			string productName = (string)lstProducts.SelectedItem;
			
			foreach(Product product in mAllProducts)
			{
				if(product.Name == productName)
				{
					cboUnits.SelectedItem = product.DefaultFormat == string.Empty ? CST.NO_DEFAULT : product.DefaultFormat ;
					break;
				}
			}						
		}
	}
}