MT.D section enable or disable

nodoid

Hi,

Is there a simple way to enable or disable a single section on a mt.d view? I have a boolean element that I want to use to switch on or off a particular section.

Thanks

Paul

JohnMiller

@nodoid,

I do this a lot in some of my code, and the way I have done it is to either rebuild the Root element without that section, or modify the section and then call Root.Reload(section, animation);

Section has a RemoveRange and Remove method where you can get rid of the elements you dont want. Root also has a Remove(section, animation) method where you could remove an entire section. You could insert it back later with the Root.Insert(index, section) method. Its a little tricky because you need to keep track of where you want it to be inserted at if its not simply at the beginning or end.

I use the BooleanElement.ValueChanged event to RemoveRange on a section on the true value, and I use the Insert method on the false value.

nodoid

Yeah. This is also the solution I came up with. A bit messy, but it works

GavinGrant

Try subclassing Element as below. In theory calling ReloadData() on the rootelement should force the GetCell to be called again and the internal element type to render a different control without the need to remove and insert sections.

public class ReadOnlyElement : Element where TElement : Element , new() { TElement internalElement;
StringElement readonlyElement;

Element internalElement;

Model _model;

private Element GetElement()
{
   internalElement = _isReadonly ? new StringElement(_model.Property) : new TElement();
}

public ReadOnlyElement(bool isReadOnly, Model someModel)
{          
    _model = someModel;
        internalElement = GetElement();
}

public override UITableViewCell GetCell(UITableView tv)
{
   return internalElement.GetCell(tv);
}


private bool _isReadOnly;
public bool IsReadOnly 
{
    get { return _isReadOnly;}
    set { _isReadOnly = value; }
}

}

This is purely theoretical mind you and may not work.