This test indicator has an expandable object as a property. The indicator compiles fine, and the expandable property displays just fine in the Indicators dialog. However, when I go to save the workspace, the log shows an error saying it could not save the indicator. The log message is:
The expandable property does not have a serializer (does it need one?), but the log error message does not sound as if that is the problem. The test indicator code is:
Am I missing something in the code and that is preventing reflection, or is this an NT bug of some sort?
Could not save indicator 'AAExpandableProperty:' There was an error reflecting type 'NinjaTrader.NinjaScript.Indicators.AAExpandablePr operty'.
Code:
#region Using declarations
using System;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using Vsa;
#endregion
//This namespace holds Indicators in this folder and is required. Do not change it.
namespace NinjaTrader.NinjaScript.Indicators
{
public class AAExpandableProperty : VsaIndicatorBase
{
public AAExpandableProperty() : base(DbgType.None) {}
protected override void OnStateChange()
{
switch (State)
{
case State.SetDefaults:
// The property cannot do this initialization for itself, because a field initializer cannot access "this"
barNumbers = new BarNumbering(this);
break;
}
}
// BarNumbering property
// * "barNumbers" is initialized by the main progam, because "this" must be passed to its constructor
private BarNumbering barNumbers;
[Browsable(true)]
[Display(Order = 0, Name = "Bar Numbering", Description = "Tooltips are not shown for BarNumbering")]
public BarNumbering BarNumbers
{
get{return barNumbers;}
set{barNumbers = value;}
}
// //////////////////////////////////////////////////////////////////////////////////////////////////////
// Type converter needed to display BarNumbering in a property grid; converts BarNumbering <--> string
public class BarNumberingTypeConverter : ExpandableObjectConverter
{
// Convert from a string to a BarNumbering; returning true means the string in the Indicators grid will be editable
public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
{ return false; } // Make the string non-editable
// Convert to a string from a ; this is what will be displayed in the Indicators dialog
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
{ return false; }
public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture,
object value, Type destinationType)
{
return (destinationType == typeof(String) && value is BarNumbering)
? ((BarNumbering)value).ToString()
: base.ConvertTo(context, culture, value, destinationType);
}
}
// //////////////////////////////////////////////////////////////////////////////////////////////////////
// The bar numbering class
[TypeConverter(typeof(BarNumberingTypeConverter))]
[Description("Expand to set the bar numbering options")]
public class BarNumbering
{
// ////////////////////////////////////////////////////////////////////////////////////////
// Constructors -- always need a parent, because the debug stuff needs an instance
private VsaIndicatorBase parent; // Needed to access the debug printing
public BarNumbering(VsaIndicatorBase parent)
{
this.parent = parent;
}
// /////////////////////////////// Enable ///////////////////////////////
private bool enable = false;
[DefaultValue(typeof(bool), "false")]
[TypeConverter(typeof(EnableDisableConverter))]
[Browsable(true)]
[Display(Order = 10, Name = "Enable bar numbering",
Description = "Enables/disables displaying bar numbers near the bars")]
public bool Enable
{
get { parent.PrintGetEntry("returning " + enable.ToString());
return enable; }
set { parent.PrintSetEntry("old value=" + enable.ToString() + " new value=" + value.ToString());
enable = value; }
}
} // class BarNumbering
} // classs AAExpandableProperty
}
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