SourceGrid - Open Source C# Grid Control

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

namespace SourceGrid.Controls
{
	/// <summary>
	/// Summary description for ComboBoxEx.
	/// </summary>
	public class TextBoxButton : System.Windows.Forms.UserControl
	{
		private TextBox txtBox;
		private System.Windows.Forms.Button btDown;
			
		/// <summary> 
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		public TextBoxButton()
		{
			// This call is required by the Windows.Forms Form Designer.
			InitializeComponent();

			btDown.BackColor = Color.FromKnownColor(KnownColor.Control);
			txtBox.AutoSize = false;
		}

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

		#region Component 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()
		{
			this.txtBox = new TextBox();
			this.btDown = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// txtBox
			// 
			this.txtBox.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.txtBox.Name = "txtBox";
			this.txtBox.Size = new System.Drawing.Size(264, 20);
			this.txtBox.TabIndex = 0;
			this.txtBox.Text = "";
			// 
			// btDown
			// 
			this.btDown.Anchor = (System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right);
			this.btDown.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
			this.btDown.Location = new System.Drawing.Point(260, 0);
			this.btDown.Name = "btDown";
			this.btDown.Size = new System.Drawing.Size(22, 64);
			this.btDown.TabIndex = 1;
			this.btDown.Text = "...";
			this.btDown.Click += new System.EventHandler(this.btDown_Click);
			// 
			// TextBoxButton
			// 
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.txtBox,
																		  this.btDown});
			this.Name = "TextBoxButton";
			this.Size = new System.Drawing.Size(282, 64);
			this.ResumeLayout(false);

		}
		#endregion

		public void FillControl()
		{
			btDown.Size = new Size(22,Height);
			btDown.Location = new Point(Width-btDown.Width,0);
			txtBox.Location = new Point(0,0);
			txtBox.Size = new Size(Width-btDown.Width,Height);
		}

		private void btDown_Click(object sender, System.EventArgs e)
		{
			OnButtonClick(EventArgs.Empty);
		}

		protected override void OnSizeChanged(EventArgs e)
		{
			base.OnSizeChanged(e);
			FillControl();
		}

//		private void txtBox_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
//		{
//			base.OnKeyDown(e);
//		}

		protected virtual void OnButtonClick(EventArgs e)
		{
			if (m_Cell==null)
				throw new ApplicationException("LoadCell not called");

			if (ButtonClick != null)
				ButtonClick(this,e);
		}

		public event EventHandler ButtonClick;

		private object m_EditObject = null;
		public object EditObject
		{
			get
			{
				if (m_Cell!=null && m_Cell.Model != null)
				{
					if (m_Cell.Model.SupportStringConversion)
						return m_Cell.Model.StringToObject(txtBox.Text);
					else
						return m_EditObject;
				}
				else
					return m_EditObject;
			}
			set
			{
				if (m_Cell!=null && m_Cell.Model!=null)
				{
					if (m_Cell.Model.SupportStringConversion)
						txtBox.Text = m_Cell.Model.ObjectToString(value);
					else
						txtBox.Text = m_Cell.Model.GetStringRappresentation(value);
				}

				m_EditObject = value;
			}
		}

		private bool ReadOnlyTextBox
		{
			get{return txtBox.ReadOnly;}
			set{txtBox.ReadOnly = value;}
		}

		private Cell m_Cell = null;
		public Cell Cell
		{
			get{return m_Cell;}
		}

		public virtual void LoadCell(Cell p_Cell, object p_StartEditValue)
		{
			m_Cell = p_Cell;

			if (p_StartEditValue!=null)
				EditObject = p_StartEditValue;
			else
				EditObject = m_Cell.Value;;

			if (m_Cell.Model.SupportStringConversion)
				ReadOnlyTextBox = false;
			else
				ReadOnlyTextBox = true;

			SelectAllDisplayText();
		}

		public void SelectAllDisplayText()
		{
			txtBox.SelectAll();
		}
	}
}