using System;
using System.Windows.Forms;
using System.ComponentModel;

namespace Payroll.Controls
{
	#region Number Control
	public class NumControl : System.Windows.Forms.UserControl
	{
		#region Declaration 
		private string m_sFormat;
		private System.Windows.Forms.TextBox txtNumber;
		private System.ComponentModel.Container components = null;
		public event System.EventHandler ValueChanged;
		
		public NumControl()
		{
			m_sFormat="0.00";
			InitializeComponent();
		}

		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if(components != null)
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}
		#endregion

		#region Component Designer generated code
		private void InitializeComponent()
		{
            this.txtNumber = new System.Windows.Forms.TextBox();
            this.SuspendLayout();
            // 
            // txtNumber
            // 
            this.txtNumber.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.txtNumber.Font = new System.Drawing.Font("Tahoma", 8.25F);
            this.txtNumber.Location = new System.Drawing.Point(1, 1);
            this.txtNumber.Name = "txtNumber";
            this.txtNumber.Size = new System.Drawing.Size(144, 21);
            this.txtNumber.TabIndex = 0;
            this.txtNumber.Text = "0.00";
            this.txtNumber.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
            this.txtNumber.TextChanged += new System.EventHandler(this.txtNumber_TextChanged);
            this.txtNumber.Validated += new System.EventHandler(this.txtNumber_Validated);
            this.txtNumber.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.txtNumber_KeyPress);
            // 
            // NumControl
            // 
            this.Controls.Add(this.txtNumber);
            this.Name = "NumControl";
            this.Size = new System.Drawing.Size(147, 23);
            this.Resize += new System.EventHandler(this.ctlNumber_Resize);
            this.ForeColorChanged += new System.EventHandler(this.EaseNum_ForeColorChanged);
            this.ResumeLayout(false);
            this.PerformLayout();

		}
		#endregion
	
		#region Conreol Related fucntion
		[Description("Set border style of the control"), Category("Behavior")]
		public BorderStyle BorderStyle
		{
			get{return txtNumber.BorderStyle;}
			set{txtNumber.BorderStyle=value;}
		}
		
		[Description("Sets the numeric value format"), Category("Behavior")]
		public string Format
		{
			get{return m_sFormat;}
			set
			{
				m_sFormat=value;
				txtNumber.Text=m_sFormat;
			}
		}

		[Description("Sets the numeric type value"), Category("Behavior")]
		public double Value
		{
			get{return double.Parse(txtNumber.Text);}
			set{txtNumber.Text= value.ToString(m_sFormat);}
		}
		public override string ToString()
		{
			return txtNumber.Text;
		}
		private void ctlNumber_Resize(object sender, System.EventArgs e)
		{
			if (this.Width<=10){this.Width=10;}
			this.Height=20;
			
			txtNumber.Top=0;
			txtNumber.Left=0;
			txtNumber.Width=this.Width;
			txtNumber.Height=this.Height;
		}

		private void txtNumber_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
		{
			int i=0, nCount=0; string sVal="";
			switch (e.KeyChar)
			{
				case '\b':
					e.Handled=false;
					break;
				case '.':
					while (i < txtNumber.Text.Length)
					{
						sVal=txtNumber.Text.Substring(i,1);
						if (sVal=="."){nCount=nCount+1;}
						i=i+1;
					}
					e.Handled=(nCount!=0);
					break;

				case '-':
					if (txtNumber.SelectionStart>1)
					{e.Handled=true;}
					else
					{
						while (i < txtNumber.Text.Length)
						{
							sVal=txtNumber.Text.Substring(i,1);
							if (sVal=="-"){nCount=nCount+1;}
							i=i+1;
						}
						e.Handled=(nCount!=0);
					}
					break;

				default:
					if (Char.IsDigit(e.KeyChar)==false)
					{e.Handled=true;}
					break;
			}
		}

		private void txtNumber_Validated(object sender, System.EventArgs e)
		{
			if(txtNumber.Text.Trim().Length<=0){txtNumber.Text="0.00";}
			string sValue=txtNumber.Text;
			try
			{
				double dbl=double.Parse(sValue);
				sValue=dbl.ToString(m_sFormat);
				txtNumber.Text=sValue;
			}
			catch(Exception exp)
			{
				MessageBox.Show(exp.Message,"Error");
				txtNumber.Text="0.00";
				this.Focus();
			}
		}
		private void txtNumber_TextChanged(object sender, System.EventArgs e)
		{
			try
			{	
				ValueChanged(sender, e);
				return;
			}
			catch
			{
				
			}
		}

		private void EaseNum_ForeColorChanged(object sender, System.EventArgs e)
		{
			txtNumber.ForeColor=this.ForeColor;
		}
		#endregion

		#region Lately Added Functions & Properties
		private int _nMaxLength=32767;
		public int MaxLength
		{
			get{return _nMaxLength;}
			set{_nMaxLength=value;}
		}
		public void SetSelection(int nStart, int nLength)
		{
			txtNumber.SelectionStart=nStart;
			txtNumber.SelectionLength=nLength;
		}
		#endregion
	}
	#endregion
}