orbtk 0.2.17

extern crate orbtk;

use orbtk::{Window, TextBox, Rect, Label, Event};
use orbtk::traits::{EventFilter, Place, Text};

fn main() {
    let mut window = Window::new(Rect::new(100, 100, 420, 420), "Filtered Textbox");

    let label = Label::new();
    label.text("Field below will ignore all 'e' chars.")
         .position(10, 10).size(400, 16);
    window.add(&label);

    let text_field = TextBox::new();
    text_field.position(10, 32).size(400, 16).event_filter(|_widget, event, _focused, _redraw| {
        match event {
            Event::Text { c: 'e' } => {
                None
            }
            _ => {
                Some(event)
            }
        }
    });
    window.add(&text_field);

    let label = Label::new();
    label.text("Field below will only accept numbers \n(as defined by unicode)")
         .position(10, 32+16+6).size(400, 32);
    window.add(&label);

    let text_field = TextBox::new();
    text_field.position(10, 32+32+12+16).size(400, 16).event_filter(|_widget, event, _focused, _redraw| {
        match event {
            Event::Text { c } => {
                if c.is_numeric() {
                    Some(event)
                } else {
                    None
                }
            }
            _ => {
                Some(event)
            }
        }
    });
    window.add(&text_field);

    window.exec();
}