GUI Objects

GUI objects let Expr scripts create custom dialogs, forms, controls, and visual content. They are host application objects, so they are mainly used in custom UI scripts.

The main pattern is:

1. Create controls.
2. Configure them with methods.
3. Add controls to a container or window.
4. Keep the window object alive while it is open.
5. Show the window.

class Demo()
{
    wnd = none();
 
    function close()
    {
        wnd.request_close();
    }
 
    function show()
    {
        wnd = window().title('Example').size(320, 160);
        wnd.add(label().position(10, 10).size(260, 24).text('Hello'));
        wnd.add(textbutton().position(10, 50).size(100, 28).text('Close').on_click(this.close));
        wnd.show();
    }
}
 
demo = Demo();
demo.show();

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