|
using System;
using System.Windows.Controls;
using System.Windows;
namespace System.Windows.Controls.Primitives
{
/// <summary>
/// This DragCompletedEventArgs class contains additional information about the
/// DragCompleted event.
/// </summary>
/// <seealso cref="Thumb.DragCompletedEvent" />
/// <seealso cref="RoutedEventArgs" />
public class DragCompletedEventArgs: RoutedEventArgs
{
/// <summary>
/// This is an instance constructor for the DragCompletedEventArgs class. It
/// is constructed with a reference to the event being raised.
/// </summary>
/// <returns>Nothing.</returns>
public DragCompletedEventArgs(double horizontalChange, double verticalChange, bool canceled) : base()
{
_horizontalChange = horizontalChange;
_verticalChange = verticalChange;
_wasCanceled = canceled;
RoutedEvent=Thumb.DragCompletedEvent;
}
/// <value>
/// Read-only access to the horizontal distance between the point where mouse's left-button
/// was pressed and the point where mouse's left-button was released
/// </value>
public double HorizontalChange
{
get { return _horizontalChange; }
}
/// <value>
/// Read-only access to the vertical distance between the point where mouse's left-button
/// was pressed and the point where mouse's left-button was released
/// </value>
public double VerticalChange
{
get { return _verticalChange; }
}
/// <summary>
/// Read-only access to boolean states whether the drag operation was canceled or not.
/// </summary>
/// <value></value>
public bool Canceled
{
get { return _wasCanceled; }
}
/// <summary>
/// This method is used to perform the proper type casting in order to
/// call the type-safe DragCompletedEventHandler delegate for the DragCompletedEvent event.
/// </summary>
/// <param name="genericHandler">The handler to invoke.</param>
/// <param name="genericTarget">The current object along the event's route.</param>
/// <returns>Nothing.</returns>
/// <seealso cref="Thumb.DragCompletedEvent" />
/// <seealso cref="DragCompletedEventHandler" />
protected override void InvokeEventHandler(Delegate genericHandler, object genericTarget)
{
DragCompletedEventHandler handler = (DragCompletedEventHandler)genericHandler;
handler(genericTarget, this);
}
private double _horizontalChange;
private double _verticalChange;
private bool _wasCanceled;
}
/// <summary>
/// This delegate must used by handlers of the DragCompleted event.
/// </summary>
/// <param name="sender">The current element along the event's route.</param>
/// <param name="e">The event arguments containing additional information about the event.</param>
/// <returns>Nothing.</returns>
public delegate void DragCompletedEventHandler(object sender, DragCompletedEventArgs e);
}
|