/// <summary>
/// Unloads dependency properties.
/// </summary>
protected void UnloadDependencyProperties()
{
var template = _template;
while (true)
{
List <DependencyProperty> dependencyProperties;
if (DependencyProperties.TryGetValue(template, out dependencyProperties))
{
// iterate through all dependency properties and clear run-time values
for (int i = 0; i < dependencyProperties.Count; ++i)
{
dependencyProperties[i].Unload(this);
}
}
// do the same for properties in base class
template = template.BasedOn;
if (template == ViewTemplates.Default)
{
break;
}
}
}
/// <summary>
/// Gets list of state changing properties.
/// </summary>
private List <DependencyProperty> GetStateChangingProperties(string newState)
{
// get list of properties changing state for this template
List <DependencyProperty> stateChangingProperties;
if (!StateChangingProperties.TryGetValue(_template, out stateChangingProperties))
{
List <DependencyProperty> templateStateChangingProperties = null;
// initialize list of all properties that changes state for this template
var template = _template;
while (true)
{
if (DependencyProperties.TryGetValue(template, out var dependencyProperties))
{
// iterate through all dependency properties and check if it has state
for (int i = 0; i < dependencyProperties.Count; ++i)
{
var dependencyProperty = dependencyProperties[i];
if (dependencyProperty.HasState(_template))
{
if (templateStateChangingProperties == null)
{
templateStateChangingProperties = new List <DependencyProperty>();
}
templateStateChangingProperties.Add(dependencyProperties[i]);
}
}
}
// do the same for properties in base class
template = template.BasedOn;
if (template == ViewTemplates.Default)
{
break;
}
}
stateChangingProperties = templateStateChangingProperties;
StateChangingProperties.Add(_template, stateChangingProperties);
}
if (stateChangingProperties == null)
{
return(null);
}
// filter properties and return those affected by the state change
var filteredStateChangingProperties = new List <DependencyProperty>();
for (int i = 0; i < stateChangingProperties.Count; ++i)
{
var property = stateChangingProperties[i];
if (!property.HasState(_template, _previousState) && !property.HasState(_template, newState))
{
continue;
}
filteredStateChangingProperties.Add(stateChangingProperties[i]);
}
return(filteredStateChangingProperties);
}