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use termion::event::Key;
use failure::Backtrace;
use crate::coordinates::{Coordinates, Position, Size};
use crate::preview::Previewer;
use crate::widget::{Widget, WidgetCore};
use crate::hbox::HBox;
use crate::fail::{HError, HResult, ErrorLog};
#[derive(PartialEq)]
pub struct MillerColumns<T> where T: Widget {
pub widgets: HBox<T>,
pub core: WidgetCore,
// pub left: Option<T>,
// pub main: Option<T>,
//pub preview: AsyncPreviewer,
pub preview: Previewer,
pub ratio: (u16, u16, u16),
}
impl<T> MillerColumns<T>
where
T: Widget + PartialEq,
{
pub fn new(core: &WidgetCore) -> MillerColumns<T> {
MillerColumns {
widgets: HBox::new(core),
core: core.clone(),
ratio: (20, 30, 50),
preview: Previewer::new(core)
}
}
pub fn push_widget(&mut self, widget: T) {
self.widgets.push_widget(widget);
self.refresh().log();
}
pub fn pop_widget(&mut self) -> Option<T> {
let widget = self.widgets.pop_widget();
self.refresh().log();
widget
}
pub fn prepend_widget(&mut self, widget: T) {
self.widgets.prepend_widget(widget);
}
pub fn calculate_coordinates(&self) -> (Coordinates, Coordinates, Coordinates) {
let coordinates = self.get_coordinates().unwrap();
let xsize = coordinates.xsize();
let ysize = coordinates.ysize();
let top = coordinates.top().y();
let ratio = self.ratio;
let left_xsize = xsize * ratio.0 / 100;
let left_size = Size((left_xsize, ysize));
let left_pos = coordinates.top();
let main_xsize = xsize * ratio.1 / 100;
let main_size = Size((main_xsize, ysize));
let main_pos = Position((left_xsize + 2, top));
let preview_xsize = xsize * ratio.2 / 100;
let preview_size = Size((preview_xsize - 1, ysize));
let preview_pos = Position((left_xsize + main_xsize + 3, top));
let left_coords = Coordinates {
size: left_size,
position: left_pos,
};
let main_coords = Coordinates {
size: main_size,
position: main_pos,
};
let preview_coords = Coordinates {
size: preview_size,
position: preview_pos,
};
(left_coords, main_coords, preview_coords)
}
pub fn get_left_widget(&self) -> HResult<&T> {
let len = self.widgets.widgets.len();
if len < 2 {
return Err(HError::NoWidgetError(Backtrace::new()));
}
let widget = self.widgets.widgets.get(len - 2)?;
Ok(widget)
}
pub fn get_left_widget_mut(&mut self) -> HResult<&mut T> {
let len = self.widgets.widgets.len();
if len < 2 {
return Err(HError::NoWidgetError(Backtrace::new()));
}
let widget = self.widgets.widgets.get_mut(len - 2)?;
Ok(widget)
}
pub fn get_main_widget(&self) -> HResult<&T> {
let widget = self.widgets.widgets.last()?;
Ok(widget)
}
pub fn get_main_widget_mut(&mut self) -> HResult<&mut T> {
let widget = self.widgets.widgets.last_mut()?;
Ok(widget)
}
}
impl<T> Widget for MillerColumns<T>
where
T: Widget,
T: PartialEq
{
fn get_core(&self) -> HResult<&WidgetCore> {
Ok(&self.core)
}
fn get_core_mut(&mut self) -> HResult<&mut WidgetCore> {
Ok(&mut self.core)
}
fn refresh(&mut self) -> HResult<()> {
let (left_coords, main_coords, preview_coords) = self.calculate_coordinates();
if let Ok(left_widget) = self.get_left_widget_mut() {
left_widget.set_coordinates(&left_coords).log();
}
if let Ok(main_widget) = self.get_main_widget_mut() {
main_widget.set_coordinates(&main_coords).log();
}
let preview_widget = &mut self.preview;
preview_widget.set_coordinates(&preview_coords)?;
Ok(())
}
fn get_drawlist(&self) -> HResult<String> {
let left_widget = self.get_left_widget()?;
let main_widget = self.get_main_widget()?;
let preview = self.preview.get_drawlist()?;
Ok(format!("{}{}{}",
main_widget.get_drawlist()?,
left_widget.get_drawlist()?,
preview))
}
fn on_key(&mut self, key: Key) -> HResult<()> {
self.get_main_widget_mut().unwrap().on_key(key)
}
}
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