initial commit

using rltk

src/gui.rs

@@ -0,0 +1,112 @@
+use super::{CombatStats, GameLog, Map, Name, Player, Point, Position};
+use rltk::{Rltk, RGB};
+use specs::prelude::*;
+
+pub fn draw_ui(ecs: &World, ctx: &mut Rltk) {
+    ctx.draw_box(0, 43, 79, 6, RGB::named(rltk::WHITE), RGB::named(rltk::BLACK));
+
+    // Render stats
+    let combat_stats = ecs.read_storage::<CombatStats>();
+    let players = ecs.read_storage::<Player>();
+    for (_player, stats) in (&players, &combat_stats).join() {
+        let health = format!(" HP: {} / {} ", stats.hp, stats.max_hp);
+        ctx.print_color(12, 43, RGB::named(rltk::YELLOW), RGB::named(rltk::BLACK), &health);
+        ctx.draw_bar_horizontal(28, 43, 51, stats.hp, stats.max_hp, RGB::named(rltk::RED), RGB::named(rltk::BLACK));
+    }
+
+    // Render message log
+    let log = ecs.fetch::<GameLog>();
+    let mut y = 44;
+    for s in log.entries.iter().rev() {
+        if y < 49 {
+            ctx.print(2, y, s);
+        }
+        y += 1;
+    }
+
+    // Render mouse cursor
+    let mouse_pos = ctx.mouse_pos();
+    ctx.set_bg(mouse_pos.0, mouse_pos.1, RGB::named(rltk::MAGENTA));
+
+    draw_tooltips(ecs, ctx);
+}
+
+fn draw_tooltips(ecs: &World, ctx: &mut Rltk) {
+    let map = ecs.fetch::<Map>();
+    let names = ecs.read_storage::<Name>();
+    let positions = ecs.read_storage::<Position>();
+
+    let mouse_pos = ctx.mouse_pos();
+    if mouse_pos.0 >= map.width || mouse_pos.1 >= map.height {
+        return;
+    }
+    let mut tooltip: Vec<String> = Vec::new();
+    for (name, position) in (&names, &positions).join() {
+        let idx = map.xy_idx(position.x, position.y);
+        if position.x == mouse_pos.0 && position.y == mouse_pos.1 && map.visible_tiles[idx] {
+            tooltip.push(name.name.to_string());
+        }
+    }
+
+    if !tooltip.is_empty() {
+        let mut width: i32 = 0;
+        for s in tooltip.iter() {
+            if width < s.len() as i32 {
+                width = s.len() as i32;
+            }
+            width += 3;
+
+            if mouse_pos.0 > 40 {
+                let arrow_pos = Point::new(mouse_pos.0 - 2, mouse_pos.1);
+                let left_x = mouse_pos.0 - width;
+                let mut y = mouse_pos.1;
+                for s in tooltip.iter() {
+                    ctx.print_color(left_x, y, RGB::named(rltk::WHITE), RGB::named(rltk::GREY), s);
+                    let padding = (width - s.len() as i32) - 1;
+                    for i in 0..padding {
+                        ctx.print_color(
+                            arrow_pos.x - i,
+                            y,
+                            RGB::named(rltk::WHITE),
+                            RGB::named(rltk::GREY),
+                            &" ".to_string(),
+                        );
+                    }
+                    y += 1;
+                }
+                ctx.print_color(
+                    arrow_pos.x,
+                    arrow_pos.y,
+                    RGB::named(rltk::WHITE),
+                    RGB::named(rltk::GREY),
+                    &"->".to_string(),
+                );
+            } else {
+                let arrow_pos = Point::new(mouse_pos.0 + 1, mouse_pos.1);
+                let left_x = mouse_pos.0 + 3;
+                let mut y = mouse_pos.1;
+                for s in tooltip.iter() {
+                    ctx.print_color(left_x + 1, y, RGB::named(rltk::WHITE), RGB::named(rltk::GREY), s);
+                    let padding = (width - s.len() as i32) - 1;
+                    for i in 0..padding {
+                        ctx.print_color(
+                            arrow_pos.x + 1 + i,
+                            y,
+                            RGB::named(rltk::WHITE),
+                            RGB::named(rltk::GREY),
+                            &" ".to_string(),
+                        );
+                    }
+                    y += 1;
+                }
+                ctx.print_color(
+                    arrow_pos.x,
+                    arrow_pos.y,
+                    RGB::named(rltk::WHITE),
+                    RGB::named(rltk::GREY),
+                    &"<-".to_string(),
+                );
+            }
+        }
+    }
+}