/// <summary>
/// Removes the vertex that was added by the Execute method.
/// </summary>
/// <returns></returns>
public override bool Undo()
{
bool success = false;
if (this.Node != null)
{
IPoints objPoints = this.Node as IPoints;
if (objPoints != null)
{
if (this.vertexIdx >= 0 && this.vertexIdx < objPoints.PointCount)
{
objPoints.RemovePoint(this.vertexIdx);
success = true;
}
}
}
return(success);
}
/// <summary>
/// Deletes the specified vertex from the node.
/// </summary>
/// <param name="cmdTarget">Unused</param>
/// <returns>true if successful, otherwise false</returns>
/// <remarks>
/// This method gets the IPoints interface from the node and
/// calls <see cref="Syncfusion.Windows.Forms.Diagram.IPoints.RemovePoint"/>
/// to remove the vertex.
/// </remarks>
public override bool Do(object cmdTarget)
{
bool success = false;
if (this.Node != null)
{
IPoints objPoints = this.Node as IPoints;
if (objPoints != null)
{
if (this.vertexIdx >= 0 && this.vertexIdx < objPoints.PointCount)
{
this.ptValue = objPoints.GetPoint(this.vertexIdx);
objPoints.RemovePoint(this.vertexIdx);
success = true;
}
}
}
return(success);
}