added dragging

src/input.rs

@@ -38,7 +38,7 @@ impl Input {
                 self.held_mouse.insert(button.clone() as u8);
             },
             Event::MouseButtonReleased { button, x, y } => {
-                self.held_mouse.insert(button.clone() as u8);
+                self.held_mouse.remove(&(button.clone() as u8));
             },
             _ => {}
         }

src/main.rs

@@ -15,7 +15,9 @@ use sfml::graphics::{
 };
 use sfml::system::*;
 use sfml::window::{Event, Key, Style};
-use sfml::window::mouse::Button;
+use sfml::window::mouse::*;
+use sfml::window::mouse;
+
 
 use vulkano::sync;
 use std::sync::Arc;
@@ -84,7 +86,10 @@ fn main() {
     let mut accumulator_time: f32 = 0.0;
     let mut current_time: f32 = timer.elap_time();
 
+    let mut mouse_xy = Vector2i::new(0,0);
+
     while window.is_open() {
+
         while let Some(event) = window.poll_event() {
             match event {
                 Event::Closed => return,
@@ -94,18 +99,13 @@ fn main() {
                     }
                 },
                 Event::MouseButtonPressed { button, x, y } => {
-
+                    mouse_xy = mouse::desktop_position();
                 },
                 Event::MouseWheelScrolled { wheel, delta, x, y } => {
-
                     if delta > 0.0 {
-                        println!("{:?}", delta);
-                        println!("{:?}", background_sprite.get_scale());
-                        background_sprite.set_scale(background_sprite.get_scale()+Vector2f::new(0.1,0.1));
+                        background_sprite.set_scale(background_sprite.get_scale()*Vector2f::new(1.1,1.1));
                     } else {
-                        println!("{:?}", delta);
-                        println!("{:?}", background_sprite.get_scale()+Vector2f::new(-0.1,-0.1));
-                        background_sprite.set_scale(background_sprite.get_scale()+Vector2f::new(-0.1,-0.1));
+                        background_sprite.set_scale(background_sprite.get_scale()*Vector2f::new(0.9,0.9));
                     }
                 },
                 _ => {}
@@ -114,7 +114,14 @@ fn main() {
         }
 
         if input.is_mousebutton_held(Button::Left) {
-            
+
+            let delta = mouse_xy - mouse::desktop_position();
+            mouse_xy = mouse::desktop_position();
+
+            println!("{:?}", delta);
+            background_sprite.set_position(
+                background_sprite.position() - Vector2f::new(delta.x as f32, delta.y as f32)
+            );
         }
 
         elapsed_time = timer.elap_time();