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);
+    }
+}