Expand/collapse properties

[deltaZ]

Hello,

I'm looking to make a set of properties be hidden/shown using the [+] button mechanics that the default Plot pen properties use for setting the properties of a plot.

I've been attempting to use ExpandableObjectConverter. Hiding/showing the properties/values is working fine. My problem is that the default values of the intval and boolval properties are used when clicking 'Apply' after changing the values in the property grid dialog. I'm trying to make the user-defined values persist after the indicator is applied.

Here's what I have so far:

TestClass testobj = new TestClass();

[TypeConverter(typeof(ExpandableObjectConverter))]
public class TestClass
{
private int intval = 4;
private bool boolval = false;

public int MyInt
{
get { return intval; }
set { intval = value; }
}

public bool MyBool
{
get { return boolval; }
set { boolval = value; }
}

public override string ToString() { return "test str"; }
}

[Description("Test property")]
[Category("Test Category")]
[Gui.Design.DisplayName("Testing")]
public TestClass TestProp
{
get { return testobj; }
}


Thanks for your help!

[NinjaTrader_ChelseaB]

Hello deltaZ,

Thank you for reporting the behavior.

I was able to reproduce and I am inquiring about the cause and expected behavior.

Please note that type converters are not documented or officially supported.

I appreciate your patience.

[NinjaTrader_ChelseaB]

Hello deltaZ,

I got it worked out, the expandable class is setting internal private variables. These are not being accessed outside of the class.

I was working with brushes and was already working on this question, and the solution I worked out is in an example with brushes. But this still relates to any object type.

Also, this example was attempting to demonstrate a few different ways of creating properties and is not directly related to your inquiry, but does have a demonstration of how this would work correctly for your question.

[deltaZ]

Thanks for looking into this for me ChelseaB.

Unfortunately I still run into the same issue when declaring the expandable class variables as public -- the user-defined values do not persist.


Code:

TestClass testobj = new TestClass();

[TypeConverter(typeof(ExpandableObjectConverter))]
public class TestClass
{
public int intval = 4;
public bool boolval = false;

public int MyInt
{
get { return intval; }
set { intval = value; }
}

public bool MyBool
{
get { return boolval; }
set { boolval = value; }
}

public override string ToString() { return "test str"; }
}


[Description("Test property")]
[Category("Test Category")]
[Gui.Design.DisplayName("Testing")]
public TestClass AThing
{
get { return testobj; }
}


Were you able to get it working after reproducing from my original post?

[NinjaTrader_ChelseaB]

Hello deltaZ,

Where are you trying to use this value in the code?

Are you using the class object and accessing the child property (i.e. AThing.intval)?

Also, is the AThing meant to be a NinjaScriptProperty?

Wait, it looks like you have a get and no set. So the property can be gotten but can't be set.

Have you tried using the example I have provided you?

[NinjaTrader_ChelseaB]

Hello deltaZ,

This was completely my mistake.

I overlooked you were asking this for NinjaTrader 7 and not for NinjaTrader 8.

I was focusing on NinjaTrader 8 and was not testing this with NinjaTrader 7.

For NinjaTrader 7, this would be outside of what we are able to able to support. However, Bertrand has posted some links you may find helpful.

http://ninjatrader.com/support/forum/showthread.php?p=368153#post368153

Another trader has offered to share his unsupported code.

http://ninjatrader.com/support/forum/showthread.php?t=64810

[deltaZ]

Thanks for the resources. I'll see if I can find a solution there.