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use termion::event::{Event};
use crate::widget::Widget;
use crate::coordinates::{Coordinates, Size, Position};
use crate::fail::HResult;
#[derive(PartialEq)]
pub struct HBox<T: Widget> {
pub coordinates: Coordinates,
pub widgets: Vec<T>,
pub active: Option<usize>,
}
impl<T> HBox<T> where T: Widget + PartialEq {
pub fn new() -> HBox<T> {
HBox { coordinates: Coordinates::new(),
widgets: vec![],
active: None
}
}
pub fn resize_children(&mut self) {
let coords: Vec<Coordinates>
= self.widgets.iter().map(
|w|
self.calculate_coordinates(w)).collect();
for (widget, coord) in self.widgets.iter_mut().zip(coords.iter()) {
widget.set_coordinates(coord);
}
}
pub fn push_widget(&mut self, widget: T) where T: PartialEq {
self.widgets.push(widget);
self.resize_children();
self.refresh();
}
pub fn pop_widget(&mut self) -> Option<T> {
let widget = self.widgets.pop();
self.resize_children();
self.refresh();
widget
}
pub fn prepend_widget(&mut self, widget: T) {
self.widgets.insert(0, widget);
self.resize_children();
self.refresh();
}
pub fn calculate_coordinates(&self, widget: &T)
-> Coordinates where T: PartialEq {
let xsize = self.coordinates.xsize();
let ysize = self.coordinates.ysize();
let top = self.coordinates.top().y();
let pos = self.widgets.iter().position(|w | w == widget).unwrap();
let num = self.widgets.len();
let widget_xsize = (xsize / num as u16) + 1;
let widget_xpos = widget_xsize * pos as u16;
Coordinates {
size: Size((widget_xsize,
ysize)),
position: Position((widget_xpos,
top))
}
}
pub fn active_widget(&self) -> &T {
&self.widgets.last().unwrap()
}
}
impl<T> Widget for HBox<T> where T: Widget + PartialEq {
fn render_header(&self) -> String {
self.active_widget().render_header()
}
fn refresh(&mut self) {
self.resize_children();
for child in &mut self.widgets {
child.refresh();
}
}
fn get_drawlist(&self) -> String {
self.widgets.iter().map(|child| {
child.get_drawlist()
}).collect()
}
fn get_coordinates(&self) -> &Coordinates {
&self.coordinates
}
fn set_coordinates(&mut self, coordinates: &Coordinates) {
if self.coordinates == *coordinates {
return;
}
self.coordinates = coordinates.clone();
self.refresh();
}
fn on_event(&mut self, event: Event) -> HResult<()> {
self.widgets.last_mut()?.on_event(event).ok();
Ok(())
}
}
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