Render a ghost stone over the current cursor location

This commit is contained in:
Savanni D'Gerinel 2023-03-30 21:01:48 -04:00
parent c2e7399e55
commit 392e162d3a
1 changed files with 52 additions and 0 deletions

View File

@ -6,11 +6,18 @@ use std::{cell::RefCell, rc::Rc};
const WIDTH: i32 = 800; const WIDTH: i32 = 800;
const HEIGHT: i32 = 800; const HEIGHT: i32 = 800;
#[derive(Clone, Default, PartialEq)]
struct Addr {
row: u8,
column: u8,
}
#[derive(Default)] #[derive(Default)]
pub struct GobanPrivate { pub struct GobanPrivate {
drawing_area: gtk::DrawingArea, drawing_area: gtk::DrawingArea,
goban: Rc<RefCell<GobanElement>>, goban: Rc<RefCell<GobanElement>>,
cursor_location: Rc<RefCell<Addr>>,
} }
#[glib::object_subclass] #[glib::object_subclass]
@ -26,6 +33,7 @@ impl ObjectImpl for GobanPrivate {
self.drawing_area.set_height_request(HEIGHT); self.drawing_area.set_height_request(HEIGHT);
let goban = self.goban.clone(); let goban = self.goban.clone();
let cursor_location = self.cursor_location.clone();
self.drawing_area self.drawing_area
.set_draw_func(move |_, context, width, height| { .set_draw_func(move |_, context, width, height| {
let goban = goban.borrow(); let goban = goban.borrow();
@ -72,7 +80,36 @@ impl ObjectImpl for GobanPrivate {
}; };
}) })
}); });
let cursor = cursor_location.borrow();
pen.ghost_stone(context, cursor.row, cursor.column, Color::White);
}); });
let motion_controller = gtk::EventControllerMotion::new();
{
let goban = self.goban.clone();
let cursor = self.cursor_location.clone();
let drawing_area = self.drawing_area.clone();
motion_controller.connect_motion(move |_, x, y| {
let goban = goban.borrow();
let mut cursor = cursor.borrow_mut();
let hspace_between = ((WIDTH - 40) as f64) / ((goban.size.width - 1) as f64);
let vspace_between = ((HEIGHT - 40) as f64) / ((goban.size.height - 1) as f64);
let addr = Addr {
column: ((x.round() - 20.) / hspace_between).round() as u8,
row: ((y.round() - 20.) / vspace_between).round() as u8,
};
if *cursor != addr {
println!("redrawing with cursor at {} {}", addr.row, addr.column);
*cursor = addr;
drawing_area.queue_draw();
}
});
}
self.drawing_area.add_controller(motion_controller);
} }
} }
impl WidgetImpl for GobanPrivate {} impl WidgetImpl for GobanPrivate {}
@ -128,4 +165,19 @@ impl Pen {
); );
let _ = context.fill(); let _ = context.fill();
} }
fn ghost_stone(&self, context: &cairo::Context, row: u8, col: u8, color: Color) {
match color {
Color::White => context.set_source_rgba(0.9, 0.9, 0.9, 0.5),
Color::Black => context.set_source_rgba(0.0, 0.0, 0.0, 0.5),
};
context.arc(
20.0 + (col as f64) * self.hspace_between,
20.0 + (row as f64) * self.vspace_between,
25.0,
0.0,
2.0 * std::f64::consts::PI,
);
let _ = context.fill();
}
} }