historic , undo and redo

src/music.rs

@@ -31,6 +31,8 @@ pub struct Music {
     teta: f32,
     #[serde(skip)]
     pub current_delta: f32,
+    #[serde(skip)]
+    point_removed: Vec<(f32, PolygonFrame)>,
 }
 
 impl Music {
@@ -77,6 +79,7 @@ impl Music {
             length: 60.0,
             teta: 0.,
             current_delta: 0.,
+            point_removed: vec![],
         }
     }
 
@@ -116,19 +119,25 @@ impl Music {
         index: usize,
         sound: StaticSoundData,
         sound_name: String,
-    ) {
+    ) -> String {
         let current_frame = self.find_poly_frame(delta);
         current_frame.polygons[index].sound = sound;
+        let out = current_frame.polygons[index].sound_name.clone();
         current_frame.polygons[index].sound_name = sound_name;
+        out
     }
 
-    pub fn set_teta(&mut self, delta: f32, index: usize, teta: f32) {
+    pub fn set_teta(&mut self, delta: f32, index: usize, teta: f32) -> f32 {
+        let out = self.find_poly_frame(delta).polygons[index].global_teta;
         self.find_poly_frame(delta).polygons[index].global_teta = teta;
+        out
     }
 
-    pub fn set_color(&mut self, delta: f32, index: usize, color: Color) {
+    pub fn set_color(&mut self, delta: f32, index: usize, color: Color) -> Color {
         let current_frame = self.find_poly_frame(delta);
+        let out = current_frame.polygons[index].color.clone();
         current_frame.polygons[index].color = color;
+        out
     }
 
     pub fn set_color_picker(&mut self, delta: f32, i: usize, b: bool) {
@@ -146,9 +155,19 @@ impl Music {
         self.poly_frame
             .insert(pos, (delta, self.current_frame(delta).clone()));
     }
+    pub fn add_point_old(&mut self) {
+        if let Some(pair) = self.point_removed.pop() {
+            let pos = self
+                .poly_frame
+                .binary_search_by(|(d, _)| d.partial_cmp(&pair.0).unwrap())
+                .unwrap_or_else(|e| e);
+            self.poly_frame.insert(pos, pair);
+        }
+    }
     pub fn remove_point(&mut self, delta: f32) {
         let i = self.find_index_frame(delta);
         if i != 0 {
+            self.point_removed.push(self.poly_frame[i].clone());
             self.poly_frame.remove(i);
         }
     }
@@ -159,8 +178,15 @@ impl Music {
         current_frame.polygons.push(poly);
     }
 
-    pub fn remove_polygon(&mut self, delta: f32, i: usize) {
-        self.find_poly_frame(delta).polygons.remove(i);
+    pub fn remove_polygon(&mut self, delta: f32, i: usize) -> String {
+        let pf = self.find_poly_frame(delta);
+        let mut i = i;
+        if i == usize::MAX {
+            i = pf.polygons.len() - 1
+        }
+        let out = pf.polygons[i].name.clone();
+        pf.polygons.remove(i);
+        out
     }
 
     pub fn slide_to_left(&mut self, delta: f32) {