add a simple counter

src/button.rs

@@ -0,0 +1,47 @@
+use sfml::{graphics::{CircleShape, Color, Drawable, Font, Shape, Text, Transformable}, system::Vector2f};
+
+pub struct Button<'a> {
+    background: CircleShape<'a>,
+    text: Text<'a>,
+    pub exec: Box<dyn Fn(u32) -> u32>
+}
+
+impl<'a> Button<'a> {
+    pub fn new(text: String, font: &'a Font, pos: Vector2f, exec: Box<dyn Fn(u32) -> u32>) -> Self {
+        let mut background = CircleShape::new(20., 20);
+        background.set_origin((20., 20.));
+        background.set_position(pos);
+        background.set_fill_color(Color::GREEN);
+
+        let mut text = Text::new(&text, font, 32);
+        text.set_position(background.position());
+        text.set_fill_color(Color::BLACK);
+        let bounds = text.local_bounds();
+        text.set_origin((
+            bounds.left + bounds.width / 2.,
+            bounds.top + bounds.height / 2.,
+        ));
+
+        Button {
+            background,
+            text,
+            exec
+        }
+    }
+
+    pub fn contains(&self, x: i32, y: i32) -> bool {
+        self.background.global_bounds().contains(Vector2f::new(x as f32, y as f32))
+    }
+}
+
+impl<'d> Drawable for Button<'d> {
+    fn draw<'a: 'shader, 'texture, 'shader, 'shader_texture>(
+            &'a self,
+            target: &mut dyn sfml::graphics::RenderTarget,
+            states: &sfml::graphics::RenderStates<'texture, 'shader, 'shader_texture>,
+        ) {
+        
+        self.background.draw(target, states);
+        self.text.draw(target, states);
+    }
+} 

src/counter.rs

@@ -0,0 +1,124 @@
+use sfml::{
+    graphics::{Color, Drawable, Font, RectangleShape, Shape, Text, Transformable},
+    system::Vector2f,
+};
+
+use crate::button::Button;
+
+pub struct Counter<'a> {
+    count: u32,
+    count_str: Text<'a>,
+    background: RectangleShape<'a>,
+    dec_button: Button<'a>,
+    inc_button: Button<'a>,
+    reset_button: Button<'a>,
+}
+
+impl<'a> Counter<'a> {
+    pub fn new(count: u32, font: &'a Font) -> Self {
+        let mut background = RectangleShape::with_size(Vector2f::new(200., 70.));
+        background.set_fill_color(Color::YELLOW);
+        background.set_outline_color(Color::BLUE);
+        background.set_outline_thickness(10.);
+        background.set_position((400., 300.));
+        let bounds = background.local_bounds();
+        background.set_origin((
+            bounds.left + bounds.width / 2.,
+            bounds.top + bounds.height / 2.,
+        ));
+
+        let mut count_str = Text::new(&count.to_string(), font, 32);
+        count_str.set_fill_color(Color::BLACK);
+        count_str.set_position((400., 300.));
+        let bounds = count_str.local_bounds();
+        count_str.set_origin((
+            bounds.left + bounds.width / 2.,
+            bounds.top + bounds.height / 2.,
+        ));
+
+        let dec_button = Button::new(
+            "-".to_string(),
+            font,
+            Vector2f::new(
+                background.position().x - 70.,
+                background.position().y,
+            ),
+            Box::new(|count| if count == 0 { 0 } else { count - 1 }),
+        );
+
+        let inc_button = Button::new(
+            "+".to_string(),
+            font,
+            Vector2f::new(
+                background.position().x + 70.,
+                background.position().y,
+            ),
+            Box::new(|count| if count == u32::MAX { 0 } else { count + 1 }),
+        );
+
+        let reset_button = Button::new(
+            "R".to_string(),
+            font,
+            Vector2f::new(0., 0.),
+            Box::new(|_count| 0),
+        );
+
+        Counter {
+            count,
+            count_str,
+            background,
+            dec_button,
+            inc_button,
+            reset_button,
+        }
+    }
+
+    pub fn inc(&mut self) {
+        self.count = (self.inc_button.exec)(self.count);
+        self.update();
+    }
+
+    pub fn dec(&mut self) {
+        self.count = (self.dec_button.exec)(self.count);
+        self.update();
+    }
+
+    pub fn reset(&mut self) {
+        self.count = (self.reset_button.exec)(self.count);
+        self.update();
+    }
+
+    fn update(&mut self) {
+        self.count_str.set_string(&self.count.to_string());
+        let digits = self.count.checked_ilog10().unwrap_or(0);
+        if self.count % (10 * if digits == 0 { 1 } else { digits }) == 0 {
+            let bounds = self.count_str.local_bounds();
+            self.count_str.set_origin((
+                bounds.left + bounds.width / 2.,
+                bounds.top + bounds.height / 2.,
+            ));
+        }
+    }
+
+    pub fn handle_mouse(&mut self, x: i32, y: i32) {
+        if self.dec_button.contains(x, y) {
+            self.dec();
+        }
+        if self.inc_button.contains(x, y) {
+            self.inc();
+        }
+    }
+}
+
+impl<'d> Drawable for Counter<'d> {
+    fn draw<'a: 'shader, 'texture, 'shader, 'shader_texture>(
+        &'a self,
+        target: &mut dyn sfml::graphics::RenderTarget,
+        states: &sfml::graphics::RenderStates<'texture, 'shader, 'shader_texture>,
+    ) {
+        self.background.draw(target, states);
+        self.count_str.draw(target, states);
+        self.dec_button.draw(target, states);
+        self.inc_button.draw(target, states);
+    }
+}

src/main.rs

@@ -1,3 +1,38 @@
-fn main() {
-    println!("Hello, world!");
+use sfml::{graphics::{Color, Font, RenderTarget, RenderWindow}, window::{mouse, Event, Key, Style}, SfResult};
+
+mod counter;
+use counter::Counter;
+
+mod button;
+
+fn main() -> SfResult<()>{
+    let font = Font::from_file("res/font.ttf").unwrap();
+    let mut c1 = Counter::new(0, &font);
+
+    let mut window = RenderWindow::new((800, 600), "Multi Counter", Style::CLOSE, &Default::default())?;
+    window.set_framerate_limit(60);
+
+    while window.is_open() {
+        while let Some(event) = window.poll_event() {
+            match event {
+                Event::Closed => window.close(),
+                Event::KeyPressed { code, .. } => match code {
+                    Key::Left => c1.dec(),
+                    Key::Right => c1.inc(),
+                    Key::Space => c1.reset(),
+                    _ => {}
+                },
+                Event::MouseButtonPressed { button, x, y } => if button == mouse::Button::Left {
+                    c1.handle_mouse(x, y);
+                }
+                _ => {}
+            }
+        }
+
+        window.clear(Color::BLACK);
+        window.draw(&c1);
+        window.display();
+    }
+    
+    Ok(())
 }