source: branches/HeuristicLab.Problems.GrammaticalOptimization/SharpVectorCore/Events/IEvent.cs @ 13231

using System;

namespace SharpVectors.Dom.Events
{
  /// <summary>
  /// (DOM Level 2)
  /// The Event interface is used to provide contextual information about an
  /// event to the listener processing the event.
  /// </summary>
  /// <remarks>
  /// An object which implements the <c>IEvent</c> interface is passed as
  /// the parameter to an <see cref="EventListener">EventListener</see>.
  /// More specific context information is passed to event listeners by
  /// deriving additional interfaces from <see cref="IEvent">IEvent</see>
  /// which contain information directly relating to the type of event
  /// they represent. These derived interfaces are also implemented by
  /// the object passed to the event listener.
  /// </remarks>
  public interface IEvent
  {
    #region Properties
    
    #region DOM Level 2
    
    /// <summary>
    /// (DOM Level 2)
    /// The name must be an
    /// <see href="http://www.w3.org/TR/1999/REC-xml-names-19990114/#NT-NCName">NCName</see>
    /// as defined in
    /// [<see href="http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/references.html#Namespaces">XML Namespaces</see>]
    /// and is case-sensitive.
    /// </summary>
    /// <remarks>
    /// The character ":" (colon) should not be used in this attribute.
    /// If the attribute <see cref="IEvent.NamespaceUri">IEvent.NamespaceUri</see>
    /// is different from <c>null</c>, this attribute represents a
    /// <see href="http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/glossary.html#dt-localname">local name</see>.
    /// </remarks>
    string Type
    {
      get;
    }
    
    /// <summary>
    /// (DOM Level 2)
    /// Used to indicate the
    /// <see href="http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/glossary.html#dt-event-target">event target</see>.
    /// </summary>
    /// <remarks>
    /// This attribute contains the
    /// <see href="http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/glossary.html#dt-target-node">target node</see>
    /// when used with the
    /// <see href="http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/events.html#Events-flow">DOM event flow</see>.
    /// </remarks>
    IEventTarget Target
    {
      get;
    }
    
    /// <summary>
    /// (DOM Level 2)
    /// Used to indicate the <see cref="IEventTarget">IEventTarget</see>
    /// whose <see cref="EventListener">EventListener</see>s are
    /// currently being processed.
    /// </summary>
    /// <remarks>
    /// This is particularly useful during the capture and bubbling
    /// phases. This attribute could contain the
    /// <see href="http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/glossary.html#dt-target-node">target node</see>
    /// or a target ancestor when used with the
    /// <see href="http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/events.html#Events-flow">DOM event flow</see>.
    /// </remarks>
    IEventTarget CurrentTarget
    {
      get;
    }
    
    /// <summary>
    /// (DOM Level 2)
    /// Used to indicate which phase of event flow is currently being
    /// accomplished.
    /// </summary>
    EventPhase EventPhase
    {
      get;
    }
    
    /// <summary>
    /// (DOM Level 2)
    /// Used to indicate whether or not an event is a bubbling event.
    /// </summary>
    /// <remarks>
    /// If the event can bubble the value is <c>true</c>, otherwise the
    /// value is <c>false</c>.
    /// </remarks>
    bool Bubbles
    {
      get;
    }
    
    /// <summary>
    /// (DOM Level 2)
    /// Used to indicate whether or not an event can have its default
    /// action prevented.
    /// </summary>
    /// <remarks>
    /// If the default action can be prevented the value is <c>true</c>,
    /// otherwise the value is <c>false</c>.
    /// </remarks>
    /// <seealso href="http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/events.html#Events-flow-cancelation">Default actions and cancelable events</seealso>
    bool Cancelable
    {
      get;
    }
    
    /// <summary>
    /// (DOM Level 2)
    /// Used to specify the time at which the event was created.
    /// </summary>
    /// <remarks>
    /// Due to the fact that some systems may not provide this information
    /// the value of <see cref="TimeStamp">TimeStamp</see> may be not
    /// available for all events. When not available, a value of <c>0</c>
    /// will be returned. Examples of epoch time are the time of the
    /// system start or 0:0:0 UTC 1st January 1970.
    /// </remarks>
    DateTime TimeStamp
    {
      get;
    }
    
    #endregion
    
    #region DOM Level 3 Experimental
    
    /// <summary>
    /// (DOM Level 3 Experimental)
    /// The
    /// <see href="http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/glossary.html#dt-namespaceURI">namespace URI</see>
    /// associated with this event at creation time, or <c>null</c> if it
    /// is unspecified.
    /// </summary>
    /// <remarks>
    /// For events initialized with a DOM Level 2 Events method, such as
    /// <see cref="InitEvent">InitEvent</see>, this is always <c>null</c>.
    /// </remarks>
    string NamespaceUri
    {
      get;
    }
    
    /// <summary>
    /// (DOM Level 3 Experimental)
    /// This method will always return <c>false</c>, unless the event
    /// implements the <see cref="ICustomEvent">ICustomEvent</see>
    /// interface.
    /// </summary>
    /// <value>
    /// <c>true</c> if the event implements the
    /// <see cref="ICustomEvent">ICustomEvent</see> interface.
    /// <c>false</c> otherwise.
    /// </value>
    bool IsCustom
    {
      get;
    }
    
    /// <summary>
    /// (DOM Level 3 Experimental)
    /// This method will return true if the method
    /// <see cref="PreventDefault">PreventDefault</see> has been called
    /// for this event, <c>false</c> otherwise.
    /// </summary>
    /// <value>
    /// <c>true</c> if <see cref="PreventDefault">PreventDefault</see>
    /// has been called for this event.
    /// </value>
    bool IsDefaultPrevented
    {
      get;
    }
    
    #endregion
    
    #endregion
    
    #region Methods
    
    #region DOM Level 2
    
    /// <summary>
    /// (DOM Level 2)
    /// Prevent event listeners of the same group to be triggered.
    /// </summary>
    /// <remarks>
    /// <para>
    /// This method is used to prevent event listeners of the same group
    /// to be triggered but its effect is differed until all event
    /// listeners attached on the currentTarget have been triggered.
    /// Once it has been called, further calls to that method
    /// have no additional effect. 
    /// </para>
    /// <para>
    /// Note: This method does not prevent the default action
    /// from being invoked; use preventDefault for that effect.
    /// </para>
    /// </remarks>
    /// <seealso href="http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/events.html#Events-propagation-and-groups">
    /// Event propagation and event groups
    /// </seealso>
    void StopPropagation();
    
    /// <summary>
    /// (DOM Level 2)
    /// Signify that the event is to be canceled.
    /// </summary>
    /// <remarks>
    /// <para>
    /// If an event is cancelable, the
    /// <see cref="PreventDefault">PreventDefault</see> method is used to
    /// signify that the event is to be canceled, meaning any default
    /// action normally taken by the implementation as a result of the
    /// event will not occur and thus independently of event groups.
    /// Calling this method for a non-cancelable event has no effect.
    /// </para>
    /// <para>
    /// Note: This method does not stop the event propagation; use
    /// <see cref="StopPropagation">StopPropagation</see> or
    /// <see cref="StopImmediatePropagation">StopImmediatePropagation</see>
    /// for that effect.
    /// </para>
    /// </remarks>
    /// <seealso href="http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/events.html#Events-flow-cancelation">Default actions and cancelable events</seealso>
    void PreventDefault();
    
    /// <summary>
    /// (DOM Level 2)
    /// The <see cref="InitEvent">InitEvent</see> method is used to initialize
    /// the value of an <see cref="IEvent">IEvent</see> created through the
    /// <see cref="IDocumentEvent.CreateEvent">IDocumentEvent.CreateEvent</see>
    /// method.
    /// </summary>
    /// <remarks>
    /// This method may only be called before the
    /// <see cref="IEvent">IEvent</see> has been dispatched via the
    /// <see cref="IEventTarget.DispatchEvent">IEventTarget.DispatchEvent</see>
    /// method. If the method is called several times before invoking
    /// <see cref="IEventTarget.DispatchEvent">IEventTarget.DispatchEvent</see>,
    /// only the final invocation takes precedence. If called from a
    /// subclass of <see cref="IEvent">Event</see> interface only the
    /// values specified in this method are modified, all other
    /// attributes are left unchanged. This method sets the
    /// <see cref="IEvent.Type">IEvent.Type</see> attribute to
    /// <c>eventTypeArg</c>, and
    /// <see cref="IEvent.LocalName">IEvent.LocalName</see> and
    /// <see cref="IEvent.NamespaceUri">IEvent.NamespaceUri</see>
    /// to <c>null</c>. To initialize an event with a local name and
    /// namespace URI, use the
    /// <see cref="InitEventNs">InitEventNs</see> method.
    /// </remarks>
    /// <param name="eventTypeArg">
    /// Specifies the event type.
    /// </param>
    /// <param name="canBubbleArg">
    /// Specifies whether or not the event can bubble. This parameter
    /// overrides the intrinsic bubbling behavior of the event.
    /// </param>
    /// <param name="cancelableArg">
    /// Specifies whether or not the event's default action can be
    /// prevented. This parameter overrides the intrinsic cancelable
    /// behavior of the event.
    /// </param>
    void InitEvent(
      string eventTypeArg,
      bool canBubbleArg,
      bool cancelableArg);
    
    #endregion
    
    #region DOM Level 3 Experimental
    
    /// <summary>
    /// (DOM Level 3 Experimental)
    /// The <see>InitEventNs</see> method is used to initialize the value
    /// of an <see cref="IEvent">IEvent</see> created through the
    /// <see cref="IDocumentEvent">IDocumentEvent</see> interface.
    /// </summary>
    /// <remarks>
    /// This method may only be called before the
    /// <see cref="IEvent">IEvent</see> has been dispatched via the
    /// <see cref="IEventTarget.DispatchEvent">IEventTarget.DispatchEvent</see>
    /// method, though it may be called multiple times the event has been
    /// dispatched. If called multiple times the final invocation takes
    /// precedence. If a call to <see cref="InitEvent">InitEventNs</see>
    /// is made after one of the <see cref="IEvent">IEvent</see> derived
    /// interfaces' init methods has been called, only the values
    /// specified in the <see cref="InitEvent">InitEventNs</see> method
    /// are modified, all other attributes are left unchanged.
    /// This method sets the <see cref="IEvent.Type">IEvent.Type</see>
    /// attribute to <c>eventTypeArg</c>, and
    /// <see cref="IEvent.NamespaceUri">IEvent.NamespaceUri</see> to
    /// <c>namespaceUriArg</c>.
    /// </remarks>
    /// <param name="namespaceUriArg">
    /// Specifies the
    /// <see href="http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/glossary.html#dt-namespaceURI">namespace URI</see>
    /// associated with this event, or <c>null</c> if no namespace.
    /// </param>
    /// <param name="eventTypeArg">
    /// Specifies the
    /// <see href="http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/glossary.html#dt-localname">local name</see>
    /// of the event type (see also the description of
    /// <see cref="IEvent.Type">IEvent.Type</see>).
    /// </param>
    /// <param name="canBubbleArg">
    /// Specifies whether or not the event can bubble.
    /// </param>
    /// <param name="cancelableArg">
    /// Specifies whether or not the event's default action can be prevented.
    /// </param>
    void InitEventNs(
      string namespaceUriArg,
      string eventTypeArg,
      bool canBubbleArg,
      bool cancelableArg);
    
    /// <summary>
    /// (DOM Level 3 Experimental)
    /// Immediately prevent event listeners of the same group
    /// to be triggered.
    /// </summary>
    /// <remarks>
    /// <para>
    /// This method is used to prevent event listeners of the same group
    /// to be triggered and, unlike
    /// <see cref="StopPropagation">StopPropagation</see> its effect is
    /// immediate. Once it has been called, further calls to that method
    /// have no additional effect.
    /// </para>
    /// <para>
    /// Note: This method does not prevent the default action from being
    /// invoked; use <see cref="PreventDefault">PreventDefault</see> for
    /// that effect.
    /// </para>
    /// </remarks>
    /// <seealso href="http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/events.html#Events-propagation-and-groups">Event propagation and event groups</seealso>
    void StopImmediatePropagation();
    
    #endregion
    
    #endregion
  }
}