Dlang UI program using GTK framework , TreeView Widget.

[Alain De Vos]

The GTK TreeView widget is powerfull but complex widget. Though Dlang has very good GTK bindings.

dub init

go into directory
Change dub.json

{
    "authors": [
        "x"
    ],
    "copyright": "Copyright © 2021, x",
    "dependencies": {
        "gtk-d": "~>3.9.0"
    },
    "description": "A minimal D application.",
    "license": "proprietary",
    "name": "gtkd_treeview"

}

Change ./source/app.d

import gtk.Main;
import gtk.MainWindow;
import gtk.Box;
import gtk.Button;
import gtk.Widget;
import gtk.ListStore;
import gtk.TreeViewColumn;
import gtk.CellRendererText;
import gtk.TreeView;
import gtk.TreeIter;
import gtk.TreeSelection;
import gtk.TreePath;
import gtk.TreeModelIF;
import gtk.TreeIter;
import std.stdio;
import gdk.Event;

class MyWindow : MainWindow {
    Box vbox;
    ListStore store;

       void quit(){
        Main.quit();
    }
  
    void store_addrow(ref ListStore store,string name,int age){
        TreeIter it=store.createIter();
        store.setValue(it,0,name);
        store.setValue(it,1,age);
    }

void view_addcolumn(ref TreeView tv, string name, int colindex) {
    TreeViewColumn col = new TreeViewColumn();
    col.setTitle(name);
    col.setSortColumnId(colindex);
  
    CellRendererText r = new CellRendererText();
  
    // 1. Pack the renderer into the column first
    col.packStart(r, true);
  
    // 2. Now you can add the attribute
    col.addAttribute(r, "text", colindex);
  
    r.setAlignment(1.0, 1.0);
    tv.appendColumn(col);
}
    TreeIter store_get_row(int index){
            TreeIter it;
            store.getIterFirst(it);
            for(int t=0;t<index;t++){
                store.iterNext(it);
            }
            return it;
        }
      
    this(){
        super("Treeview");
        setSizeRequest(400,300);
        setHexpand(0);
        addOnDestroy(delegate void(Widget w) { quit(); } );
        vbox=new Box(Orientation.VERTICAL,5);
        auto mytreeview=new TreeView();
      
        store=new ListStore([GType.STRING,GType.INT]);
        store_addrow(store,"Alain.............................",10);
        store_addrow(store,"Eddy",5);

        TreeView tv=new TreeView();
        view_addcolumn(tv,"Name",0);
        view_addcolumn(tv,"Age",1);

        tv.setModel(store);

        vbox.packStart(tv,true,true,0);
        Button remove=new Button("Remove");
        remove.addOnButtonRelease(&removeme);
        vbox.packStart(remove,false,false,0);
        store_addrow(store,"Jan",15);
        add(vbox);
        showAll();
    }
  
    private bool removeme(Event event,Widget widget){
        writeln("Hallo");
        TreeIter it;
        bool result=true;
        //store.getIterFirst(it);
        //result=store.remove(it);
        store.clear();
        return true;
    }
  
}

int main(string[] args){
    Main.init(args);
    MyWindow window=new MyWindow();
    Main.run();
    return 0;
}

run:

dub run