using System;

public class TextEditor : IDisposable
{
    private efl.ui.IWin win;
    private efl.ui.IText editor;
    private efl.ui.IButton toolbarNew;

    private bool edited = false;


    private void GUIQuitCb(object sender, EventArgs ea)
    {
        efl.ui.Config.Exit();
    }

    private void EditorChangedCb(object sender, EventArgs ea)
    {
        edited = true;
        GUIToolbarRefresh();
    }

    private efl.ui.IButton GUIToolbarButtonAdd(efl.ui.IBox toolbar, string name, string iconName, EventHandler func)
    {
        efl.ui.IButton button = new efl.ui.Button(toolbar);
        button.SetText(name);
        button.ClickedEvt += func;

        toolbar.DoPack(button);

        efl.ui.IImage img = new efl.ui.Image(toolbar);
        img.SetIcon(iconName);

        efl.Content.static_cast(button.GetPart("efl.content")).SetContent(img);

        return button;
    }

    private void GUIToolbarSetup(efl.ui.IBox parent)
    {
        efl.ui.IBox bar = new efl.ui.Box(parent);
        bar.SetHintWeight(1, 0);
        bar.SetDirection(efl.ui.Dir.Horizontal);
        parent.DoPack(bar);

        toolbarNew = GUIToolbarButtonAdd(bar, "New", "document-new",
          (object sender, EventArgs ea) =>
	    {
              editor.SetText("");
              edited = false;
              GUIToolbarRefresh();
	    });

        // spacer box
        efl.ui.IBox box = new efl.ui.Box(parent);
        box.SetHintWeight(10, 0);
        bar.DoPack(box);

        GUIToolbarButtonAdd(bar, "Quit", "application-exit", GUIQuitCb);

        GUIToolbarRefresh();
    }

    private void GUIToolbarRefresh()
    {
        toolbarNew.SetDisabled(!edited);
    }

    public TextEditor()
    {
        win = new efl.ui.Win(null, (efl.ui.IWin ewin) => {
            ewin.SetWinType(efl.ui.Win_Type.Basic);
            ewin.SetText("Text Editor");
            ewin.SetAutohide(true);
        });

        // when the user clicks "close" on a window there is a request to hide
        win.HideEvt += GUIQuitCb;

        efl.ui.IBox box = new efl.ui.Box(win);
        eina.Size2D sz;
        sz.W = 360;
        sz.H = 240;
        box.SetHintMin(sz);

        win.SetContent(box);

        GUIToolbarSetup(box);

        editor = new efl.ui.Text(box);
        editor.SetFont("Mono", 14);
        editor.SetMultiline(true);
        editor.SetEditable(true);
        editor.SetScrollable(true);
        editor.SetScrollable(true);
        editor.ChangedEvt += EditorChangedCb;
        editor.ChangedUserEvt += EditorChangedCb;

        box.DoPack(editor);
    }

    ~TextEditor()
    {
        Dispose(false);
    }

    protected void Dispose(bool disposing)
    {
        editor.Dispose();
        toolbarNew.Dispose();
        win.Dispose();
    }

    public void Dispose()
    {
        Dispose(true);
        GC.SuppressFinalize(this);
    }

    public void Run()
    {
        // start main loop
        efl.ui.Config.Run();
    }
}

public class Example
{
    public static void Main()
    {
        efl.All.Init(efl.Components.Ui);

        var textEditor = new TextEditor();
        textEditor.Run();

        // dispose after quit
        textEditor.Dispose();

        efl.All.Shutdown();
    }
}