Source/Editors/VisualInputBase.cs

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#if FRAMEWORK20
using System;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.ComponentModel;
using DevComponents.DotNetBar;

namespace DevComponents.Editors
{
    public class VisualInputBase : VisualItem
    {
        #region Private Variables
        private int _InputPosition = 0;
        private string _InputStack = "";
        private bool _InsertMode = true;
        private string _UndoInputStack = "";
        #endregion

        #region Events
        /// <summary>
        /// Occurs when input on the control has changed.
        /// </summary>
        public event EventHandler InputChanged;
        /// <summary>
        /// Occurs when validation of the input is performed and it allows you to deny the input.
        /// </summary>
        public event InputValidationEventHandler ValidateInput;
        /// <summary>
        /// Occurs when IsEmpty property has changed.
        /// </summary>
        public event EventHandler IsEmptyChanged;
        #endregion

        #region Constructor
        public VisualInputBase()
        {
            this.Focusable = true;
        }
        #endregion

        #region Internal Implementation
        internal override void ProcessKeyDown(KeyEventArgs e)
        {
            if (!_IsReadOnly)
                base.ProcessKeyDown(e);
        }
        internal override void ProcessKeyPress(KeyPressEventArgs e)
        {
            if (!_IsReadOnly)
                base.ProcessKeyPress(e);
        }
        internal override void ProcessKeyUp(KeyEventArgs e)
        {
            if (!_IsReadOnly)
                base.ProcessKeyUp(e);
        }
        internal override bool ProcessCmdKey(ref Message msg, Keys keyData)
        {
            if (!_IsReadOnly)
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