console_ui_engine_null/ui_components/
fps_indicator.rs

1use std::any::Any;
2use std::time::{SystemTime, UNIX_EPOCH};
3
4use crate::buffer::SizedBuffer;
5use crate::console::ConsoleUpdateInfo;
6use crate::ui_components::Content;
7use crate::ui_components::Label;
8use crate::ui_element::UiElement;
9
10ui_component_struct!(
11pub struct FpsIndicator {
12    pub position: (u16, u16),
13    label: Label,
14    last_update: u64,
15    last_fps: u16
16});
17
18impl FpsIndicator {
19    pub fn new(name: &'static str, position: (u16, u16)) -> FpsIndicator {
20        FpsIndicator {
21            name,
22            focused: false,
23            position,
24            label: Label::new("", Content::from_string("".to_string()), position),
25            last_update: 0,
26            last_fps: 0
27        }
28    }
29
30    pub fn get_fps(&self) -> u16 {
31        self.last_fps
32    }
33
34}
35
36impl UiElement for FpsIndicator {
37    fn update(&mut self, _console: &mut ConsoleUpdateInfo) {
38        let start = SystemTime::now();
39        let since_the_epoch = start.duration_since(UNIX_EPOCH).unwrap();
40        let time = since_the_epoch.as_secs() * 1000 +
41            since_the_epoch.subsec_nanos() as u64 / 1_000_000;
42        self.last_fps = (1000 / (time - self.last_update)) as u16;
43        self.last_update = time;
44        self.label.replace_content(Content::from_string("FPS: ".to_string()+self.last_fps.to_string().as_str()));
45    }
46    fn render(&self, buffer: &mut SizedBuffer) {
47        self.label.render(buffer);
48    }
49    ui_component_impl!();
50}
console_ui_engine_null/ui_components/fps_indicator.rs

console_ui_engine_null/ui_components/
fps_indicator.rs
