/// <summary>
/// Adds a disabled behavior configuration to the end of the chain.
/// </summary>
internal void Append(BehaviorKey key)
{
Check.NotNull(key, nameof(key));
RequireNotSealed();
_items.Add(new BehaviorChainItemConfiguration(key));
}
/// <summary>
/// Creates a new <see cref="BehaviorChainConfiguration"/> from this
/// template.
/// </summary>
// TODO: Comment.
internal BehaviorChainConfiguration CreateConfiguration(
IBehaviorFactoryConfiguration factoryConfiguration
)
{
Check.NotNull(factoryConfiguration, nameof(factoryConfiguration));
var config = new BehaviorChainConfiguration();
IBehaviorFactory factory = factoryConfiguration.GetFactory(_factoryProvider);
foreach (BehaviorChainItemTemplate itemTemplate in _itemTemplates)
{
BehaviorKey key = itemTemplate.Key;
if (itemTemplate.State == DefaultBehaviorState.DisabledWithoutFactory)
{
config.Append(key);
}
else
{
IBehavior instance = factory.Create(key);
config.Append(key, instance);
if (itemTemplate.State == DefaultBehaviorState.Enabled)
{
config.Enable(key);
}
}
}
return(config);
}
/// <inheritdoc />
ISinglePropertyBehaviorBuilder <TVM, TDescriptor, TValue> ISinglePropertyBehaviorBuilder <TVM, TDescriptor, TValue> .Configure <TBehavior>(
BehaviorKey key,
Action <TBehavior> configurationAction
)
{
_propertyConfiguration.ConfigureBehavior <TBehavior>(key, configurationAction);
return(this);
}
/// <inheritdoc />
ISinglePropertyBehaviorBuilder <TVM, TDescriptor, TValue> ISinglePropertyBehaviorBuilder <TVM, TDescriptor, TValue> .Enable(
BehaviorKey key,
IBehavior behaviorInstance
)
{
_propertyConfiguration.Enable(key, behaviorInstance);
return(this);
}
// Todo: Should this be public ?
public ViewModelBehaviorBuilder <TVM, TDescriptor> Configure <TBehavior>(
BehaviorKey key,
Action <TBehavior> configurationAction
) where TBehavior : IBehavior
{
_configuration.ViewModelConfiguration.ConfigureBehavior <TBehavior>(key, configurationAction);
return(this);
}
// Todo: Should this be public ?
public ViewModelBehaviorBuilder <TVM, TDescriptor> Enable(
BehaviorKey key,
IBehavior behaviorInstance = null
)
{
_configuration.ViewModelConfiguration.Enable(key, behaviorInstance);
return(this);
}
/// <summary>
/// Calls <see cref="BehaviorChainConfiguration.Enable"/> on
/// all configurations contained by this collection that contain the
/// specified '<paramref name="key"/>'.
/// </summary>
public void Enable(BehaviorKey key)
{
Check.NotNull(key, nameof(key));
foreach (BehaviorChainConfiguration config in _propertyConfigurations.Values)
{
config.Enable(key);
}
}
public TBehavior GetBehavior <TBehavior>(BehaviorKey withKey) where TBehavior : IBehavior
{
Check.NotNull(withKey, nameof(withKey));
Check.Requires <InvalidOperationException>(Contains(withKey));
RequireNotSealed();
BehaviorChainItemConfiguration item = GetItem(withKey);
return((TBehavior)item.Instance);
}
/// <summary>
/// Removes the behavior defined by '<paramref name="key"/>' from the behavior
/// chain returned by <see cref="CreateChain"/>.
/// </summary>
public void Disable(BehaviorKey key)
{
Check.NotNull(key, nameof(key));
Check.Requires <InvalidOperationException>(Contains(key));
RequireNotSealed();
var item = GetItem(key);
item.IsEnabled = false;
}
public void AddChangeHandler(Action <TVM, ChangeArgs> changeHandler)
{
// TODO: Make this more official...
var key = new BehaviorKey("ChangeListener");
_configuration.ViewModelConfiguration.Append(key);
_configuration.ViewModelConfiguration.Enable(
key,
new ChangeListenerBehavior <TVM>(changeHandler)
);
}
public void AddBehavior(IBehavior behaviorInstance, BehaviorKey key = null)
{
string keyString = String.Format(
"{0} (manually configured)",
TypeService.GetFriendlyTypeName(behaviorInstance)
);
key = key ?? new BehaviorKey(keyString);
Configuration.ViewModelConfiguration.Append(key, behaviorInstance);
Configuration.ViewModelConfiguration.Enable(key, behaviorInstance);
}
/// <summary>
/// Calls <see cref="BehaviorChainConfiguration.ConfigureBehavior"/> on
/// all configurations contained by this collection that contain the
/// specified '<paramref name="key"/>'.
/// </summary>
public void ConfigureBehavior <T>(
BehaviorKey key,
Action <T> configurationAction
) where T : IBehavior
{
Check.NotNull(key, nameof(key));
Check.NotNull(configurationAction, nameof(configurationAction));
foreach (BehaviorChainConfiguration config in _propertyConfigurations.Values)
{
config.ConfigureBehavior(key, configurationAction);
}
}
/// <summary>
/// Adds a disabled behavior configuration to the top of the chain.
/// </summary>
internal void Prepend(BehaviorKey key, IBehavior instance)
{
Check.NotNull(key, nameof(key));
Check.NotNull(instance, nameof(instance));
RequireNotSealed();
var item = new BehaviorChainItemConfiguration(key)
{
Instance = instance
};
_items.Insert(0, item);
}
/// <inheritdoc />
ISinglePropertyBehaviorBuilder <TVM, TDescriptor, TValue> ISinglePropertyBehaviorBuilder <TVM, TDescriptor, TValue> .AddChangeHandler(Action <TVM, ChangeArgs> changeHandler)
{
// TODO: Make this more official...
var key = new BehaviorKey("ChangeListener");
Configuration.ViewModelConfiguration.Append(key);
Configuration.ViewModelConfiguration.Enable(
key,
new ChangeListenerBehavior <TVM>(changeHandler)
);
return(this);
}
/// <summary>
/// Returns a new <see cref="BehaviorChainTemplate"/> with a behavior
/// chain item template added to the end of the item template list of
/// this behavior chain template.
/// </summary>
/// <param name="state">
/// If 'Disabled', the behavior is not enabled in a <see cref="BehaviorChainConfiguration"/>
/// created from this template. This means it will not be included in the finally
/// created <see cref="BehaviorChain"/> unless <see cref="BehaviorChainConfiguration.Enable"/>
/// is called.
/// </param>
public BehaviorChainTemplate Append(
BehaviorKey key,
DefaultBehaviorState state = DefaultBehaviorState.Enabled
)
{
Check.NotNull(key, nameof(key));
var itemTemplatesClone = new List <BehaviorChainItemTemplate>(_itemTemplates);
itemTemplatesClone.Add(new BehaviorChainItemTemplate(key, state));
return(new BehaviorChainTemplate(_factoryProvider, itemTemplatesClone));
}
private BehaviorChainItemConfiguration GetItem(BehaviorKey key)
{
var item = _items.Find(x => x.Key == key);
if (item == null)
{
throw new ArgumentException(
ExceptionTexts.BehaviorKeyNotInConfiguration.FormatWith(key)
);
}
return(item);
}
ISinglePropertyBehaviorBuilder <TVM, TDescriptor, TValue> ISinglePropertyBehaviorBuilder <TVM, TDescriptor, TValue> .PrependBehavior(
IBehavior behaviorInstance,
BehaviorKey key
)
{
string keyString = String.Format(
"{0} (manually configured)",
TypeService.GetFriendlyTypeName(behaviorInstance)
);
key = key ?? new BehaviorKey(keyString);
_propertyConfiguration.Prepend(key, behaviorInstance);
_propertyConfiguration.Enable(key, behaviorInstance);
return(this);
}
/// <summary>
/// Calls the '<paramref name="configurationAction"/>' with the behavior
/// specified by '<paramref name="key"/>' that will be inserted in the
/// behavior chain. This method implicitly calls <see
/// cref="Enable"/>.
/// </summary>
/// <typeparam name="T">
/// The type of the behavior to configure. This may be the concrete type
/// of the behavior or a base type/interface.
/// </typeparam>
public void ConfigureBehavior <T>(
BehaviorKey key,
Action <T> configurationAction
) where T : IBehavior
{
Check.NotNull(key, nameof(key));
Check.Requires <InvalidOperationException>(Contains(key));
Check.NotNull(configurationAction, nameof(configurationAction));
RequireNotSealed();
BehaviorChainItemConfiguration item = GetItem(key);
Enable(key);
T behavior = (T)item.Instance;
configurationAction(behavior);
}
/// <summary>
/// Makes sure that the behavior defined by '<paramref name="key"/>' gets
/// included in the behavior chain returned by <see cref="CreateChain"/>.
/// </summary>
/// <param name="behaviorInstance">
/// Specifies or overrides the default behavior instance provided by the
/// <see cref="BehaviorChainTemplate"/>. This parameter is required if
/// the template has defined the behavior with the <see
/// cref="DefaultBehaviorState.DisabledWithoutFactory"/> option.
/// </param>
public void Enable(BehaviorKey key, IBehavior behaviorInstance = null)
{
Check.NotNull(key, nameof(key));
Check.Requires <InvalidOperationException>(Contains(key));
RequireNotSealed();
var item = GetItem(key);
if (behaviorInstance != null)
{
item.Instance = behaviorInstance;
}
else
{
if (item.Instance == null)
{
throw new ArgumentException(
ExceptionTexts.CannotEnableBehavior.FormatWith(key)
);
}
}
item.IsEnabled = true;
}
/// <inheritdoc />
ISinglePropertyBehaviorBuilder <TVM, TDescriptor, TValue> ISinglePropertyBehaviorBuilder <TVM, TDescriptor, TValue> .Disable(BehaviorKey key)
{
_propertyConfiguration.Disable(key);
return(this);
}
bool ISinglePropertyBehaviorBuilder <TVM, TDescriptor, TValue> .ContainsBehavior(BehaviorKey key)
{
return(_propertyConfiguration.Contains(key));
}
public BehaviorChainItemTemplate(BehaviorKey key, DefaultBehaviorState state)
{
_key = key;
_state = state;
}
public BehaviorChainItemConfiguration(BehaviorKey key)
{
Key = key;
IsEnabled = false;
}
public bool Contains(BehaviorKey key)
{
Check.NotNull(key, nameof(key));
return(_items.Find(x => x.Key == key) != null);
}
