Three-tier .NET Application Utilizing Three ORM Technologies

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using s = System;
using u = Util;
using ns = WinUI;
using ui=UIInterface.TransactionNWAccntDlts;

namespace WinUI
{
	public partial class TransactionNWAccntDltsForm : Form, ui.IView
	{
		#region Data
		ui.IPresenter _Prsntr;
		string[] _collDltAllocAccntNames;
		bool _bCloakUIHandlers;
		bool _bInEdit;
		bool _bEditValidated;
		#endregion 

		#region Columns
		System.Windows.Forms.DataGridViewComboBoxColumn _dgvcbcAccount;
		DGTBColumn _dgvtcAmount;
		#endregion

		#region Private Functions
		void CloakUIHandlers(bool b)
		{
			_bCloakUIHandlers = b;
		}
		bool IsUICloaked(){return _bCloakUIHandlers;}
		void SetupColumns()
		{
			this._dgv.AutoGenerateColumns = false;
			System.Windows.Forms.DataGridViewCellStyle oNumberColumnStyle = Misc.CreateDataGridViewCellStyleForAmountDisplay();

			_dgvcbcAccount	= new DataGridViewComboBoxColumn();
			_dgvtcAmount	= new DGTBColumn();

			_dgvcbcAccount				.HeaderText = "Accnt";
			_dgvtcAmount				.HeaderText = "Amount";
			
			_dgvtcAmount.DefaultCellStyle = oNumberColumnStyle;
			_dgvcbcAccount.DataSource = _collDltAllocAccntNames;
			this._dgv.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
				_dgvcbcAccount				,
				_dgvtcAmount});

		}
		void HandleDownArrowPressed(bool bAdjustOnlyIfOnLast)
		{
			bool bOnLast = _dgv.CurrentCell.RowIndex == _dgv.RowCount - 1;
			if (bOnLast)
			{
				if (this._dgv.ReadOnly)
					return;
				_Prsntr.NewRecordDesired();
			}
			if(bOnLast || !bAdjustOnlyIfOnLast)
				_dgv.CurrentCell = _dgv.Rows[_dgv.CurrentCell.RowIndex+1].Cells[_dgv.CurrentCell.ColumnIndex];
		}
		#endregion

		protected override void OnLoad(EventArgs e)
		{
			base.OnLoad(e);
		}
		#region Event Handlers
		void tb_KeyDown(object sender, KeyEventArgs e)
		{
		//	s.Diagnostics.Trace.WriteLine(string.Format("Caught keydown:{0}-{1}-{2}-{3}-{4}-{5} ",e.KeyCode, e.Shift, e.Alt, e.Control, e.KeyData, e.KeyValue));
			if (e.KeyCode != Keys.Down)
				return;
			HandleDownArrowPressed(/*bAdjustOnlyIfOnLast=*/false);
		}
		void _btnSaveAndClose_Click(object sender, EventArgs e)
		{
			_Prsntr.CloseAndAcceptDesired();
		}
		void _dgv_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
		{
			if(this.IsUICloaked())
				return;
			if ((e.Control is s.Windows.Forms.TextBox))
			{			
				var tb = e.Control as s.Windows.Forms.TextBox;
				tb.KeyDown -= new KeyEventHandler(tb_KeyDown);
				tb.KeyDown += new KeyEventHandler(tb_KeyDown);
			}
			
			if(_dgv.CurrentCell.ColumnIndex == _dgvcbcAccount.Index)
			{
				var cb = e.Control as s.Windows.Forms.ComboBox;
				AutoCompleteStringCollection acsc = new AutoCompleteStringCollection();
				acsc.AddRange(_collDltAllocAccntNames);
				cb.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
				cb.AutoCompleteSource = AutoCompleteSource.ListItems;
				cb.AutoCompleteCustomSource = acsc;
			}
		}
		bool LLBeginEditCell(int iRow, int iCol)
		{
			bool bOK = false;
			if(		iCol == this._dgvcbcAccount	.Index)bOK = _Prsntr.EditAccountDesired(	iRow);
			else if(iCol == this._dgvtcAmount	.Index)bOK = _Prsntr.EditAmountDesired(		iRow);
			else
				throw new s.Exception();
			return bOK;
		}
		private void _dgv_CellBeginEdit(object sender, DataGridViewCellCancelEventArgs e)
		{
			if(this.IsUICloaked())
		        return;
		    bool bOK = LLBeginEditCell(e.RowIndex, e.ColumnIndex);

		    if(!bOK)		e.Cancel = true;
		    else
			{
				_bInEdit = true;
				_bEditValidated	= false;
			}
		}
		void _dgv_CellEndEdit(object sender, DataGridViewCellEventArgs e)
		{
			if(this.IsUICloaked())
		        return;
			if(!_bEditValidated)
				_Prsntr.CancelEdit();
		    _bInEdit = false;
			_bEditValidated = false;
		    _dgv.Rows[e.RowIndex].ErrorText = String.Empty;
		}
		bool EditCell(int iRow, int iCol, string strVal)
		{
			bool bOK = LLBeginEditCell(iRow, iCol);
			if(!bOK)
				return false;

			string strError = _Prsntr.SetValueAndEndEditOrReturnError(strVal);
			if(strError != null)
				return false;
			return true;
		}
		void _dgv_KeyDown(object sender, KeyEventArgs e)
		{
		    if (e.KeyCode == Keys.Down)
		    {
		        HandleDownArrowPressed(/*bAdjustOnlyIfOnLast=*/true);
		        return;
		    }
		    if (e.Control && e.KeyCode == Keys.V)
		    {
		        _Prsntr.BeginBatchUpdates();
		        bool bHasUnhandledErrors;
		        ns.Misc.PasteClipboardDataToGrid(_dgv, null, EditCell, out bHasUnhandledErrors);
		        _Prsntr.EndBatchUpdates();
		        if(bHasUnhandledErrors)
		            s.Windows.Forms.MessageBox.Show("Not all the values could be updated.");
		        return;
		    }
		}
		void _cbReverseSign_CheckedChanged(object sender, EventArgs e)
		{
			if(this.IsUICloaked())
				return;
			_Prsntr.DisplayWithReverseSignDesired(_cbReverseSign.Checked);
		}
		void _cbCents_CheckedChanged(object sender, EventArgs e)
		{
			if(this.IsUICloaked())
				return;
			_Prsntr.DisplayAsCentsDesired(_cbCents.Checked);
		}
		void _dgv_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
		{
		    if(this.IsUICloaked())
		        return;
		    if(!_bInEdit)
		        return;

		    string strError = _Prsntr.SetValueAndEndEditOrReturnError(e.FormattedValue.ToString());
		    if(strError !=null)
		    {
		        _dgv.Rows[e.RowIndex].ErrorText = strError;
		        e.Cancel = true;
		    }
			else
				_bEditValidated = true;
		}
		#endregion

		#region IView functions
		public void SetPresenter(		ui.IPresenter aPresenter){_Prsntr = aPresenter					;}
		public void ShowBusyIndicator(							){Misc.ShowBusyIndicator()				;}
		public void ClearBusyIndicator(							){Misc.ClearBusyIndicator()				;}
		public void ShowSimpleMessage(	string str				){Misc.ShowSimpleMessage(str)			;}
		public void ShowException(		System.Exception ex		){Misc.ShowException(ex)				;}

		public void Init(string[] arrAccountOptions, bool bReadOnly)
		{
			_dgv.ReadOnly = bReadOnly;
			_btnSaveAndClose.Enabled = !bReadOnly;
			_collDltAllocAccntNames = arrAccountOptions;
			SetupColumns();
	
		}
		public void SetRowCount(int iRows)
		{
			using(Cloak aCloak = new Cloak(CloakUIHandlers))
			{
				_dgv.RowCount = iRows;
			}
		}
		public void SetAccount(string str, int iRow)
		{
			using(Cloak aCloak = new Cloak(CloakUIHandlers))
			{
				this._dgv.Rows[iRow].Cells[_dgvcbcAccount.Index].Value = str;
			}
		}
		public void SetAmount(string str, int iRow)
		{
			using(Cloak aCloak = new Cloak(CloakUIHandlers))
			{
				this._dgv.Rows[iRow].Cells[this._dgvtcAmount.Index].Value = str;
			}
		}
		public void IndicateCentsBeingDisplayed(bool b)
		{
			using(Cloak aCloak = new Cloak(CloakUIHandlers))
			{
				this._cbCents.Checked = b;
			}
		}
		public void IndicateSignReversed(bool b)
		{
			using(Cloak aCloak = new Cloak(CloakUIHandlers))
			{
				this._cbReverseSign.Checked = b;
			}
		}
		public void SetBalance(string str, bool bInBalance)
		{
			if(bInBalance)
			{
				this._tbBalance.BackColor = s.Drawing.SystemColors.Window;
				this._tbBalance.ForeColor = s.Drawing.SystemColors.WindowText;
			}
			else
			{
				this._tbBalance.BackColor = s.Drawing.Color.White;
				this._tbBalance.ForeColor = s.Drawing.Color.Red;
			}
			this._tbBalance.Text = str;
		}
		public void FreezeDisplay()
		{
		}
		public void UpdateDisplay()
		{
		}
		public void ShowUntilUserDoneAndThenDestroy()
		{
			this.ShowDialog();
			this.Dispose();
		}
		#endregion

		#region Other Public Functions
		public TransactionNWAccntDltsForm()
		{
			InitializeComponent();
		}

		#endregion

	}
}