Source/Controls/CheckBoxX.cs

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using System;
using System.Text;
using System.Drawing;
using System.ComponentModel;
using System.Windows.Forms;

namespace DevComponents.DotNetBar.Controls
{
    /// <summary>
    /// Represents the Check Box control with extended styles.
    /// </summary>
    [ToolboxBitmap(typeof(CheckBoxX), "Controls.CheckBoxX.ico"), ToolboxItem(true), DefaultEvent("CheckedChanged"), System.Runtime.InteropServices.ComVisible(false)]
    public class CheckBoxX : BaseItemControl, ICommandSource
    {
        #region Private Variables
        private const string DefaultCheckValueUnchecked = "N";
        private const string DefaultCheckValueChecked = "Y";
        private const object DefaultCheckValueIndeterminate = null;

        private CheckBoxItem m_CheckBox = null;
        private object m_CheckValue = DefaultCheckValueUnchecked;

        private object m_CheckValueUnchecked = DefaultCheckValueUnchecked;
        private object m_CheckValueChecked = DefaultCheckValueChecked;
        private object m_CheckValueIndeterminate = DefaultCheckValueIndeterminate;
        private bool m_ConsiderEmptyStringAsNull = true;
        #endregion

        #region Events
        /// <summary>
        /// Occurs before Checked property is changed and allows you to cancel the change.
        /// </summary>
        public event CheckBoxXChangeEventHandler CheckedChanging;
        
        /// <summary>
        /// Occurs after Checked property is changed with extended information.
        /// </summary>
        public event CheckBoxXChangeEventHandler CheckedChangedEx;

        /// <summary>
        /// Occurs after Checked property is changed. This event is provided for the Windows Forms data binding support. You can use CheckedChangedEx to get extended information about the changed.
        /// </summary>
        public event EventHandler CheckedChanged;

        /// <summary>
        /// Occurs after Checked property is changed. This event is provided for the Windows Forms data binding support. You can use CheckedChangedEx to get extended information about the changed.
        /// </summary>
        public event EventHandler CheckValueChanged;
        #endregion

        #region Constructor, Dispose
        public CheckBoxX()
        {
            this.SetStyle(ControlStyles.Selectable, true);
            m_CheckBox = new CheckBoxItem();
            m_CheckBox.VerticalPadding = 0;
            m_CheckBox.Style = eDotNetBarStyle.Office2007;
            m_CheckBox.CheckedChanging += new CheckBoxChangeEventHandler(OnCheckedChanging);
            m_CheckBox.CheckedChanged += new CheckBoxChangeEventHandler(OnCheckedChanged);
            this.HostItem = m_CheckBox;