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use termion::event::{Event};
use crate::widget::{Widget, WidgetCore};
use crate::coordinates::{Coordinates, Size, Position};
use crate::fail::{HResult, ErrorLog};
#[derive(PartialEq)]
pub struct HBox<T: Widget> {
pub core: WidgetCore,
pub widgets: Vec<T>,
pub active: Option<usize>,
}
impl<T> HBox<T> where T: Widget + PartialEq {
pub fn new(core: &WidgetCore) -> HBox<T> {
HBox { core: core.clone(),
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).log();
}
}
pub fn push_widget(&mut self, widget: T) where T: PartialEq {
self.widgets.push(widget);
self.resize_children();
self.refresh().log();
}
pub fn pop_widget(&mut self) -> Option<T> {
let widget = self.widgets.pop();
self.resize_children();
self.refresh().log();
widget
}
pub fn prepend_widget(&mut self, widget: T) {
self.widgets.insert(0, widget);
self.resize_children();
self.refresh().log();
}
pub fn calculate_coordinates(&self, widget: &T)
-> Coordinates where T: PartialEq {
let coordinates = self.get_coordinates().unwrap();
let xsize = coordinates.xsize();
let ysize = coordinates.ysize();
let top = 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 get_core(&self) -> HResult<&WidgetCore> {
Ok(&self.core)
}
fn get_core_mut(&mut self) -> HResult<&mut WidgetCore> {
Ok(&mut self.core)
}
fn render_header(&self) -> HResult<String> {
self.active_widget().render_header()
}
fn refresh(&mut self) -> HResult<()> {
self.resize_children();
for child in &mut self.widgets {
child.refresh()?
}
Ok(())
}
fn get_drawlist(&self) -> HResult<String> {
Ok(self.widgets.iter().map(|child| {
child.get_drawlist().unwrap()
}).collect())
}
fn on_event(&mut self, event: Event) -> HResult<()> {
self.widgets.last_mut()?.on_event(event)?;
Ok(())
}
}
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