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use crate::align::*;
use crate::event::{Event, EventResult};
use crate::rect::Rect;
use crate::theme::ColorStyle;
use crate::view::{View, ViewWrapper};
use crate::Printer;
use crate::Vec2;
use crate::With;
use unicode_width::UnicodeWidthStr;
#[derive(Debug)]
pub struct Panel<V> {
view: V,
title: String,
title_position: HAlign,
invalidated: bool,
}
new_default!(Panel<V: Default>);
const TITLE_SPACING: usize = 3;
impl<V> Panel<V> {
pub fn new(view: V) -> Self {
Panel {
view,
title: String::new(),
title_position: HAlign::Center,
invalidated: true,
}
}
#[must_use]
pub fn title<S: Into<String>>(self, label: S) -> Self {
self.with(|s| s.set_title(label))
}
pub fn set_title<S: Into<String>>(&mut self, label: S) {
self.title = label.into();
self.invalidate();
}
#[must_use]
pub fn title_position(self, align: HAlign) -> Self {
self.with(|s| s.set_title_position(align))
}
pub fn set_title_position(&mut self, align: HAlign) {
self.title_position = align;
}
fn draw_title(&self, printer: &Printer) {
if !self.title.is_empty() {
let available = match printer.size.x.checked_sub(2 * TITLE_SPACING)
{
Some(available) => available,
None => return, };
let len = std::cmp::min(self.title.width(), available);
let x =
TITLE_SPACING + self.title_position.get_offset(len, available);
printer
.offset((x, 0))
.cropped((len, 1))
.with_color(ColorStyle::title_primary(), |p| {
p.print((0, 0), &self.title)
});
printer.with_high_border(false, |printer| {
printer.print((x - 2, 0), "┤ ");
printer.print((x + len, 0), " ├");
});
}
}
fn invalidate(&mut self) {
self.invalidated = true;
}
inner_getters!(self.view: V);
}
impl<V: View> ViewWrapper for Panel<V> {
wrap_impl!(self.view: V);
fn wrap_on_event(&mut self, event: Event) -> EventResult {
self.view.on_event(event.relativized((1, 1)))
}
fn wrap_required_size(&mut self, req: Vec2) -> Vec2 {
let req = req.saturating_sub((2, 2));
let size = self.view.required_size(req) + (2, 2);
if self.title.is_empty() {
size
} else {
let title_width = self.title.width() + 2 * TITLE_SPACING;
size.or_max((title_width, 0))
}
}
fn wrap_draw(&self, printer: &Printer) {
printer.print_box((0, 0), printer.size, true);
self.draw_title(printer);
let printer = printer.offset((1, 1)).shrinked((1, 1));
self.view.draw(&printer);
}
fn wrap_layout(&mut self, size: Vec2) {
self.view.layout(size.saturating_sub((2, 2)));
}
fn wrap_important_area(&self, size: Vec2) -> Rect {
let inner_size = size.saturating_sub((2, 2));
self.view.important_area(inner_size) + (1, 1)
}
fn wrap_needs_relayout(&self) -> bool {
self.invalidated || self.view.needs_relayout()
}
}