GtkD CRUD Application

[Alaindevos via Digitalmars-d-learn]

I've written the beginning but dont know how to end.
What is the way to add functionality for the add,edit,delete 
button ?
//==================================
import gtk.Button;
import gtk.Box;
import gtk.Label;
import gtk.Entry;
import gtk.Grid;
import gtk.Main;
import gtk.MainWindow;
import gtk.Widget;
import gdk.Event: Event;
import std.array: assocArray;
import std.conv: to;
import std.format : format;
import std.range: iota, retro, drop, zip;
import std.stdio: writeln;


struct nameage {
        string name;
        int age;
}

class Row: Box {
        ulong index;
        this(nameage anameage,ulong index){
                this.index=index;
                super(Orientation.HORIZONTAL,5);
            this.packStart((new Label(anameage.name)),0,0,0);
            this.packStart((new Label(to!string(anameage.age))),0,0,0);
            this.packStart((new Button("Edit")),0,0,0);
            this.packStart((new Button("Delete")),0,0,0);

        }
}

class MyWindow : MainWindow {
        
        Box vbox;
        nameage []mynameage;
        
        void quit(){
                this.quit();
        }

        void addclicked(){
        }

        this(int sizex,int sizey){
                nameage nameage1=nameage("Alain",20);
                nameage nameage2=nameage("Eddy",30);
                mynameage ~= nameage1;
                mynameage ~= nameage2;
                super("My Locate D-lang App");
                setSizeRequest(sizex,sizey);
                setHexpand(0);
                addOnDestroy(delegate void(Widget w) { quit(); } );
                vbox=new Box(Orientation.VERTICAL,5);
                        foreach (ulong i,anameage;mynameage){
                                Row arow=new Row(anameage,i);
                                vbox.packStart(arow,0,0,0);
                        }
                        Button addbutton=new Button("Add");
                        addbutton.addOnClicked(delegate void(Button 
b){addclicked();});
                vbox.packStart(addbutton,0,0,0);

                add(vbox);
                showAll();
        }
}


int main(string[] args){
        int sizex=800;
        int sizey=600;
        Main.init(args);
        MyWindow window=new MyWindow(sizex,sizey);
        Main.run();
        return 0;
}
//==================================