/// <summary>
/// Handles the Activated event for any AttributeSimilarityCriterion control. This event
/// is fired when a AttributeSimilarityCriterion is made active, which mean that the input
/// controls should be activated and a new (inactive) control should be created.
/// However, if a control is not valid, a new control can't be added.
/// </summary>
/// <param name="sender">The specific AttributeSimilarityCriterion instance that fired the event</param>
/// <param name="e">Event arguments for the event</param>
private void AttributeSimilarityCriterion_Activated(object sender, EventArgs e)
{
bool addNew = true;
AttributeSimilarityCriterionViewModel sourceCriterion = sender as AttributeSimilarityCriterionViewModel;
// Check how many AttributeSimilarityCriterion controls we currently have
if (SimilarityCriteria.Count > 1)
{
// Loop through all AttributeSimilarityCriterion view models in our list
foreach (AttributeSimilarityCriterionViewModel criterion in SimilarityCriteria)
{
// If this criterion control is the one that fired the Activate
// event, just skip it
if (criterion == sourceCriterion)
{
continue;
}
// Check if the AttributeSimilarityCriterion is currently active
if (criterion.IsActive)
{
// Validate the Criterion
criterion.Validate();
if (!criterion.IsValid)
{
// Set a flag that we don't actually want to create
// a new Criterion because this one was invalid.
addNew = false;
SelectedCriterion = criterion;
}
}
}
}
// Check if we are actually adding a new AttributeSimilarityCriterion control
if (addNew)
{
// Set the IsActive property to true which will trigger the
// underlying StoryBoard to enable the input controls.
sourceCriterion.IsActive = true;
sourceCriterion.IsSelected = true;
// Add the new AttributeSimilarityCriterion control
SetupCriteria();
ClusteringEnabled = true;
}
else
{
sourceCriterion.IsActive = false;
}
}
/// <summary>
/// Setup the criteria collection and the initial
/// Criterion control
/// </summary>
private void SetupCriteria()
{
// Create initial clustering criterion and add it to the collection
AttributeSimilarityCriterionViewModel newClusteringCriterion = new AttributeSimilarityCriterionViewModel(this)
{
IsEnabled = true, IsActive = false, IsSelected = true
};
SimilarityCriteria.Add(newClusteringCriterion);
// Wire up event handlers for the Activated and Deactivated events of
// the newly created clusdtering criterion control
newClusteringCriterion.Activated += new EventHandler <EventArgs>(AttributeSimilarityCriterion_Activated);
newClusteringCriterion.Deactivated += new EventHandler <EventArgs>(AttributeSimilarityCriterion_Deactivated);
}
/// <summary>
/// Handles the Deactivated event for any AttributeSimilarityCriterion control. This event
/// is fired when an AttributeSimilarityCriterion is made inactive, which means it should be
/// removed.
/// </summary>
/// <param name="sender">The specific AttributeSimilarityCriterion instance that fired the event</param>
/// <param name="e">Event arguments for the event</param>
private void AttributeSimilarityCriterion_Deactivated(object sender, EventArgs e)
{
AttributeSimilarityCriterionViewModel criterion = sender as AttributeSimilarityCriterionViewModel;
// Check if we have more than one AttributeSimilarityCriterion control
if (SimilarityCriteria.Count > 1)
{
// Remove the AttributeSimilarityCriterion from the collection
SimilarityCriteria.Remove(criterion);
// Remove event handlers
criterion.Activated -= new EventHandler <EventArgs>(AttributeSimilarityCriterion_Activated);
criterion.Deactivated -= new EventHandler <EventArgs>(AttributeSimilarityCriterion_Deactivated);
}
else
{
// Disable clustering
ClusteringEnabled = false;
// Set the IsActive property to false which will trigger the
// underlying StoryBoard to disable the input controls.
criterion.IsActive = false;
}
}
/// <summary>
/// Setup the criteria collection and the initial
/// Criterion control
/// </summary>
private void SetupCriteria()
{
// Create initial clustering criterion and add it to the collection
AttributeSimilarityCriterionViewModel newClusteringCriterion = new AttributeSimilarityCriterionViewModel(this) { IsEnabled = true, IsActive = false, IsSelected = true };
SimilarityCriteria.Add(newClusteringCriterion);
// Wire up event handlers for the Activated and Deactivated events of
// the newly created clusdtering criterion control
newClusteringCriterion.Activated += new EventHandler<EventArgs>(AttributeSimilarityCriterion_Activated);
newClusteringCriterion.Deactivated += new EventHandler<EventArgs>(AttributeSimilarityCriterion_Deactivated);
}
