using System;

public class Example
{
    public static void FocusChangedCb(object sender, EventArgs e)
    {
        Console.WriteLine($"Focus for object {((Efl.IText)sender).GetText()} changed to {((Efl.Ui.Widget)sender).GetFocus()}");
    }

#if WIN32
    [STAThreadAttribute()]
#endif
    public static void Main()
    {
        // Initialize EFL and all UI components
        Efl.All.Init(Efl.Components.Ui);

        // Create a window and initialize it
        var win = new Efl.Ui.Win(null);
        win.SetWinType(Efl.Ui.WinType.Basic);
        win.SetText("Focus example");
        win.SetAutohide(true);
        win.VisibilityChangedEvt += (object sender, Efl.Gfx.IEntityVisibilityChangedEvt_Args e) => {
            // Exit the EFL main loop
            if (e.arg == false)
                Efl.Ui.Config.Exit();
        };
        

        // Create the main box container
        var vbox = new Efl.Ui.Box(win);
        vbox.SetHintSizeMin(new Eina.Size2D(360, 240));
        win.SetContent(vbox);

        // Create some check boxes
        Efl.Ui.Check first_checkbox = null;
        for (int i = 0; i< 5; i++) {
          var checkbox = new Efl.Ui.Check(vbox);
          checkbox.SetText("Check " + i);
          checkbox.SetHintAlign(0.5, 0.5);
          checkbox.FocusChangedEvt += FocusChangedCb;
          vbox.DoPack(checkbox);
          if (i == 0) first_checkbox = checkbox;
        };

        // Create an horizontal box to contain the two buttons
        var hbox = new Efl.Ui.Box(vbox);
        hbox.SetDirection(Efl.Ui.Dir.Horizontal);
        vbox.DoPack(hbox);

        // Create a "Focus Mover" button
        var button = new Efl.Ui.Button(hbox);
        button.SetText("Focus mover");
        button.FocusChangedEvt += FocusChangedCb;
        button.ClickedEvt += (object sender, EventArgs e) => {
            Console.WriteLine("Clicked Focus Mover");
            // Manually transfer focus to the first check box
            Efl.Ui.Focus.Util.Focus(first_checkbox);
        };
        hbox.DoPack(button);

        // Create a Quit button
        button = new Efl.Ui.Button(hbox);
        button.SetText("Quit");
        button.FocusChangedEvt += FocusChangedCb;
        button.ClickedEvt += (object sender, EventArgs e) => {
            Console.WriteLine("Clicked Quit");
            Efl.Ui.Config.Exit();
        };
        hbox.DoPack(button);

        // Show the focus highlight
        win.SetFocusHighlightEnabled(true);

        // Start the EFL main loop
        Efl.Ui.Config.Run();

        // Shutdown EFL
        Efl.All.Shutdown();
    }
}