/// <summary>
/// Validates the visual tree.
/// </summary>
/// <param name="dependencyObject">The dependency object.</param>
/// <param name="errors">The errors.</param>
private static void ValidateVisualTree(DependencyObject dependencyObject, ReadOnlyErrorCollection errors)
{
var count = VisualTreeHelper.GetChildrenCount(dependencyObject);
for (var i = 0; i < count; i++)
{
var child = VisualTreeHelper.GetChild(dependencyObject, i);
Validate(child as UIElement, errors);
ValidateVisualTree(child, errors);
}
}
/// <summary>
/// Validates the tree.
/// </summary>
/// <param name="dependencyObject">The dependency object.</param>
/// <param name="errors">The errors.</param>
/// <param name="validationControl">The validation control.</param>
private static void ValidateTree(DependencyObject dependencyObject, ReadOnlyErrorCollection errors,
ValidationControl validationControl)
{
switch (validationControl.ValidationMethod)
{
case TreeType.LogicalTree:
ValidateLogicalTree(dependencyObject, errors);
break;
case TreeType.VisualTree:
ValidateVisualTree(dependencyObject, errors);
break;
}
}
/// <summary>
/// Validates the specified element.
/// </summary>
/// <param name="element">The element.</param>
/// <param name="errors">The errors.</param>
private static void Validate(UIElement element, ReadOnlyErrorCollection errors)
{
if (element == null)
return;
var field = NovaValidation.GetFieldName(element);
if (string.IsNullOrEmpty(field))
return;
if (errors != null)
{
var entityID = NovaValidation.GetEntityID(element);
var validations = errors.GetValidations(field, entityID).ToList();
if (validations.Count > 0)
{
NovaValidation.SetIsValid(element, false);
//Don't get max ranking/put bullets in front of lines when there is only one message to show.
if (validations.Count == 1)
{
var validation = validations.First();
NovaValidation.SetValidationTooltip(element, validation.Message);
NovaValidation.SetSeverity(element, validation.SeverityBrush);
return;
}
var mostSevereValidationRanking = validations.Max(x => x.Severity);
var mostSevereValidation = validations.First(x => x.Severity == mostSevereValidationRanking);
NovaValidation.SetSeverity(element, mostSevereValidation.SeverityBrush);
//Since we are showing the most severe brush, show the most severe messages first as well.
validations = validations.OrderByDescending(x => x.Severity).ToList();
if (NovaValidation.GetConcatToolTip(element))
{
var builder = new StringBuilder();
for (int index = 0; index < validations.Count; index++)
{
var validation = validations[index];
builder.Append("• ").Append(validation.Message);
if (index + 1 < validations.Count)
{
builder.AppendLine();
}
}
NovaValidation.SetValidationTooltip(element, builder.ToString());
}
else
{
NovaValidation.SetValidationTooltip(element, mostSevereValidation.Message);
}
return;
}
}
NovaValidation.SetIsValid(element, true);
NovaValidation.SetValidationTooltip(element, null);
}
/// <summary>
/// Validates the visual tree.
/// </summary>
/// <param name="dependencyObject">The dependency object.</param>
/// <param name="errors">The errors.</param>
private static void ValidateLogicalTree(DependencyObject dependencyObject, ReadOnlyErrorCollection errors)
{
foreach (var child in LogicalTreeHelper.GetChildren(dependencyObject).OfType<DependencyObject>())
{
Validate(child as UIElement, errors);
ValidateLogicalTree(child, errors);
}
}
/// <summary>
/// Sets the errorlist.
/// </summary>
/// <param name="dependencyObject">The dependency object.</param>
/// <param name="value">The value.</param>
public static void SetErrors(DependencyObject dependencyObject, ReadOnlyErrorCollection value)
{
dependencyObject.SetValue(ErrorsProperty, value);
}