Adding an Inner Class

• Previously we created a separate BusinessProcess to collect the statistics of our order, now we'll use an inner class to achieve the same results
• An inner class is a class that is defined within the scope of it's container class.
• In the following code the class called myInnerClass is considered an inner class, since it is defined within the scope of it's container class ShowOrdersToDemoInnerClasses class

public class ShowOrdersToDemoInnerClasses : UIControllerBase
{
    public readonly Models.Orders Orders = new Models.Orders();
    public readonly NumberColumn Items = new NumberColumn("Items", "2");
    public readonly NumberColumn TotalQuantity = new NumberColumn("Total Quantity", "4");
    public readonly NumberColumn TotalAmount = new NumberColumn("Total Amount", "5C");
    public ShowOrdersToDemoInnerClasses()
    {
        From = Orders;
    }
    public void Run()
    {
        Execute();
    }
    protected override void OnLoad()
    {
        View = () => new Views.ShowOrdersToDemoInnerClassesView(this);
    }
    class myInnerClass
    {
    }
} 

• To quickly create an inner class, we'll use the "Inner Controller Class" snippet (contr in short)
  
• Will determine:
  • The name of the inner class - in our case "GetTotals"
  • The base class - on our case BusinessProcessBase which is the default
  • The Container class - in our case ShowOrdersToDemoInnerClasses
• Here's the result

public class ShowOrdersToDemoInnerClasses : UIControllerBase
{
    public readonly Models.Orders Orders = new Models.Orders();
    public readonly NumberColumn Items = new NumberColumn("Items", "2");
    public readonly NumberColumn TotalQuantity = new NumberColumn("Total Quantity", "4");
    public readonly NumberColumn TotalAmount = new NumberColumn("Total Amount", "5C");
    public ShowOrdersToDemoInnerClasses()
    {
        From = Orders;
    }
    public void Run()
    {
        Execute();
    }
    protected override void OnLoad()
    {
        View = () => new Views.ShowOrdersToDemoInnerClassesView(this);
    }
    class GetTotals : BusinessProcessBase
    {
        ShowOrdersToDemoInnerClasses _parent;
        public GetTotals(ShowOrdersToDemoInnerClasses parent)
        {
            _parent = parent;
        }
        public void Run()
        {
            Execute();
        }
        protected override void OnLoad()
        {
        }
    }
} 

• Note that it's getting the parent controller as a parameter to it's constructor, and stores it in a field called _parent which we cal later use to access the parent controller.
• Here is how we call our inner controller

public class ShowOrdersToDemoInnerClasses : UIControllerBase
{
    public readonly Models.Orders Orders = new Models.Orders();
    public readonly NumberColumn Items = new NumberColumn("Items", "2");
    public readonly NumberColumn TotalQuantity = new NumberColumn("Total Quantity", "4");
    public readonly NumberColumn TotalAmount = new NumberColumn("Total Amount", "5C");
    public ShowOrdersToDemoInnerClasses()
    {
        From = Orders;
    }
    public void Run()
    {
        Execute();
    }
    protected override void OnLoad()
    {
        View = () => new Views.ShowOrdersToDemoInnerClassesView(this);
    }
    protected override void OnEnterRow()
    {
        new GetTotals(this).Run();
    }
    class GetTotals : BusinessProcessBase
    {
        ShowOrdersToDemoInnerClasses _parent;
        public GetTotals(ShowOrdersToDemoInnerClasses parent)
        {
            _parent = parent;
        }
        public void Run()
        {
            Execute();
        }
        protected override void OnLoad()
        {
        }
    }
} 

• Note that when we call it, we are sending this as a parameter to it's constructor. This means that we are sending the parent controller as a parameter to the inner controller. Later we'll be able to use that _parent on our inner controller, to access fields in the parent controller.

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