/// <summary>
/// Filter the properties displayed on the UI so that I can add in the enum property
/// </summary>
/// <param name="properties"></param>
protected override void PreFilterProperties(IDictionary properties)
{
base.PreFilterProperties(properties);
#if DEBUG
Type actType = this.Activity.GetType();
PropertyInfo pi = actType.GetProperty("EnumType");
if (null != pi)
{
Type enumType = pi.GetValue(this.Activity, null) as Type;
if (null != enumType)
{
MethodInfo mi = actType.GetMethod("GetEnumTypePropertyDescriptor", BindingFlags.Instance | BindingFlags.NonPublic, null, new Type[] { typeof(IDictionary) }, null);
if (null != mi)
{
mi.Invoke(this.Activity, new object[] { properties });
}
}
}
#else
FlagsActivity act = this.Activity as FlagsActivity;
if ((null != act) && (null != act.EnumType))
{
act.GetEnumTypePropertyDescriptor(properties);
}
#endif
}
/// <summary>
/// Called when the activity is dragged onto the design surface
/// </summary>
/// <remarks>
/// Here I construct two child activities as well as the FlagsActivity.
/// </remarks>
/// <param name="host"></param>
/// <returns></returns>
protected override System.ComponentModel.IComponent[] CreateComponentsCore(System.ComponentModel.Design.IDesignerHost host)
{
CompositeActivity parent = new FlagsActivity();
parent.Activities.Add(new SequenceActivity());
parent.Activities.Add(new SequenceActivity());
return(new IComponent[] { parent });
}
/// <summary>
/// Set the value of the property
/// </summary>
/// <param name="component"></param>
/// <param name="value"></param>
public override void SetValue(object component, object value)
{
FlagsActivity act = component as FlagsActivity;
if (null != act)
{
act.BoundData.Data = value as ActivityBind;
}
}
/// <summary>
/// Reset the value to the default
/// </summary>
/// <param name="component"></param>
public override void ResetValue(object component)
{
FlagsActivity act = component as FlagsActivity;
if (null != act)
{
act.BoundData.Data = null;
}
}
/// <summary>
/// Return true if the value should be serialized
/// </summary>
/// <param name="component"></param>
/// <returns></returns>
public override bool ShouldSerializeValue(object component)
{
bool shouldSerialize = false;
FlagsActivity act = component as FlagsActivity;
if (null != act)
{
shouldSerialize = null != act.BoundData.Data;
}
return(shouldSerialize);
}
/// <summary>
/// Get the value of the property
/// </summary>
/// <param name="component"></param>
/// <returns></returns>
public override object GetValue(object component)
{
object value = null;
FlagsActivity act = component as FlagsActivity;
if (null != act)
{
value = act.BoundData.Data;
}
return(value);
}
/// <summary>
/// Return true if the value can be reset
/// </summary>
/// <param name="component"></param>
/// <returns></returns>
public override bool CanResetValue(object component)
{
bool canReset = false;
FlagsActivity act = component as FlagsActivity;
if (null != act)
{
canReset = null != act.BoundData.Data;
}
return(canReset);
}
/// <summary>
/// An activity has been added - hookup to that activites Closed event
/// </summary>
/// <param name="executionContext"></param>
/// <param name="addedActivity"></param>
protected override void OnActivityChangeAdd(ActivityExecutionContext executionContext, Activity addedActivity)
{
if (null == executionContext)
{
throw new ArgumentNullException("executionContext");
}
if (null == addedActivity)
{
throw new ArgumentNullException("addedActivity");
}
FlagsActivity act = executionContext.Activity as FlagsActivity;
if ((act.ExecutionStatus == ActivityExecutionStatus.Executing) && act.IsExecuting)
{
addedActivity.RegisterForStatusChange(Activity.ClosedEvent, this);
executionContext.ExecuteActivity(addedActivity);
}
}
/// <summary>
/// Respond to status changes on child activities
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void IActivityEventListener <ActivityExecutionStatusChangedEventArgs> .OnEvent(object sender, ActivityExecutionStatusChangedEventArgs e)
{
if (null == sender)
{
throw new ArgumentNullException("sender");
}
if (null == e)
{
throw new ArgumentNullException("e");
}
ActivityExecutionContext context = sender as ActivityExecutionContext;
if (null == context)
{
throw new ArgumentException("No execution context is available");
}
FlagsActivity act = context.Activity as FlagsActivity;
e.Activity.UnregisterForStatusChange(Activity.ClosedEvent, this);
bool canClose = true;
for (int pos = 0; pos < act.EnabledActivities.Count; pos++)
{
Activity childAct = act.EnabledActivities[pos];
if ((childAct.ExecutionStatus != ActivityExecutionStatus.Initialized) && (childAct.ExecutionStatus != ActivityExecutionStatus.Closed))
{
canClose = false;
break;
}
}
if (canClose)
{
context.CloseActivity();
}
}
