Add Menu functionality

src/window.rs

@@ -95,15 +95,15 @@
     label: String,
 }
 
-#[derive(Deserialize, Debug)]
+#[derive(Deserialize, Clone, Debug)]
 pub enum DragDropEvent {
     Enter(DragDropPayload),
     Over(DragOverPayload),
     Drop(DragDropPayload),
     Leave,
 }
 
-#[derive(Deserialize, Debug)]
+#[derive(Deserialize, Clone, Debug)]
 pub struct DragDropPayload {
     paths: Vec<PathBuf>,
     position: dpi::PhysicalPosition,
@@ -119,7 +119,7 @@
     }
 }
 
-#[derive(Deserialize, Debug)]
+#[derive(Deserialize, Clone, Debug)]
 pub struct DragOverPayload {
     position: dpi::PhysicalPosition,
 }
@@ -139,7 +139,7 @@
     /// Create a new Window.
     ///
     /// # Arguments
     /// + `label`: Unique window label. Must be alphanumberic: `a-zA-Z-/:_`.
     pub fn new(label: impl Into<String>) -> Self {
         Self {
             label: label.into(),