/// <summary>
/// Initializes a new instance of the Behavior class by associating it with a TextBox derived object. </summary>
/// <param name="textBox">
/// The TextBox object to associate with this behavior. It must not be null. </param>
/// <param name="addEventHandlers">
/// If true, the textBox's event handlers are tied to the corresponding methods on this behavior object. </param>
/// <exception cref="ArgumentNullException">textBox is null. </exception>
/// <remarks>
/// This constructor is <c>protected</c> since this class is only meant to be used as a base for other behaviors. </remarks>
/// <seealso cref="System.Windows.Forms.TextBox" />
/// <seealso cref="AddEventHandlers" />
protected Behavior(TextBox textBox, bool addEventHandlers)
{
if (textBox == null)
throw new ArgumentNullException("textBox");
this.textBox = textBox;
this.selection = new Selection(this.textBox);
this.selection.TextChanging += new EventHandler(HandleTextChangingBySelection);
if (addEventHandlers)
AddEventHandlers();
}
/// <summary>
/// Initializes a new instance of the Saver class by associating it with a TextBox derived object
/// and passing the start and end position of the selection. </summary>
/// <param name="textBox">
/// The TextBox object for which the selection is being saved. </param>
/// <param name="start">
/// The zero-based start position of the selection. </param>
/// <param name="end">
/// The zero-based end position of the selection. It must not be less than the start position. </param>
/// <remarks>
/// This constructor does not save the textbox's start and end position of the selection.
/// Instead, it saves the two given parameters. </remarks>
/// <seealso cref="System.Windows.Forms.TextBox" />
public Saver(TextBox textBox, int start, int end)
{
this.textBox = textBox;
selection = new Selection(textBox);
System.Diagnostics.Debug.Assert(start <= end);
this.start = start;
this.end = end;
}
/// <summary>
/// Initializes a new instance of the Saver class by associating it with a TextBox derived object. </summary>
/// <param name="textBox">
/// The TextBox object for which the selection is being saved. </param>
/// <remarks>
/// This constructor saves the textbox's start and end position of the selection inside private fields. </remarks>
/// <seealso cref="System.Windows.Forms.TextBox" />
public Saver(TextBox textBox)
{
this.textBox = textBox;
selection = new Selection(textBox);
selection.Get(out this.start, out this.end);
}
