using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.Data;
namespace ExByTejas
{
public class EditableListBox : ListBox
{
TextBox editBox = new TextBox();
public EditableListBox()
{
editBox.Location = new System.Drawing.Point(0, 0);
editBox.Size = new System.Drawing.Size(0, 0);
editBox.Hide();
this.Controls.AddRange(new Control[] {this.editBox});
editBox.Text = "";
editBox.BackColor = Color.Beige;
editBox.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.EditOver);
editBox.LostFocus += new System.EventHandler(this.FocusOver);
}
protected override void OnKeyPress(KeyPressEventArgs e)
{
if (e.KeyChar == 13)
CreateEditBox();
base.OnKeyPress(e);
}
protected override void OnDoubleClick(EventArgs e)
{
CreateEditBox();
base.OnDoubleClick(e);
}
protected override void OnKeyDown(KeyEventArgs e)
{
if (e.KeyData == Keys.F2)
CreateEditBox();
base.OnKeyDown(e);
}
protected void CreateEditBox()
{
Rectangle r = this.GetItemRectangle(this.SelectedIndex);
string itemText = string.Empty;
if(this.DataSource == null)
itemText = (string)this.Items[SelectedIndex];
else
itemText = this.Text;
editBox.Location = new System.Drawing.Point(r.X, r.Y);
editBox.Size = new System.Drawing.Size(r.Width - 10, r.Height);
editBox.Show();
this.Controls.AddRange(new System.Windows.Forms.Control[] {this.editBox});
editBox.Text = itemText;
editBox.Focus();
editBox.SelectAll();
editBox.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.EditOver);
editBox.LostFocus += new System.EventHandler(this.FocusOver);
}
protected void FocusOver(object sender, System.EventArgs e)
{
UpdateEditedValue();
}
protected void EditOver(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
if (e.KeyChar == 13)
UpdateEditedValue();
}
private void UpdateEditedValue()
{
if (this.DataSource == null)
{
this.Items[SelectedIndex] = editBox.Text;
editBox.Hide();
}
else
{
DataRowView rowView = (DataRowView)this.SelectedItem;
rowView.Row[this.DisplayMember] = editBox.Text;
editBox.Hide();
}
}
}
}
