Fix Singleplayer

After a certains person's MR has been merged, for some reason all traces of working Singleplayer have disappeared

Former-commit-id: 4119e4609cd39bb1896c7f28d45f5c1a7ec9c129

voxygen/src/menu/char_selection/mod.rs

@@ -45,7 +45,10 @@ impl PlayState for CharSelectionState {
             // Handle window events
             for event in global_state.window.fetch_events() {
                 match event {
-                    Event::Close => return PlayStateResult::Shutdown,
+                    Event::Close => {
+                        global_state.singleplayer = None;
+                        return PlayStateResult::Shutdown;
+                    },
                     // Pass events to ui
                     Event::Ui(event) => {
                         self.char_selection_ui.handle_event(event);
@@ -60,7 +63,10 @@ impl PlayState for CharSelectionState {
             // Maintain the UI
             for event in self.char_selection_ui.maintain(global_state.window.renderer_mut()) {
                 match event {
-                    ui::Event::Logout => return PlayStateResult::Pop,
+                    ui::Event::Logout => {
+                        global_state.singleplayer = None;
+                        return PlayStateResult::Pop;
+                    },
                     ui::Event::Play => return PlayStateResult::Push(
                         Box::new(SessionState::new(&mut global_state.window, self.client.clone()))
                     ),

voxygen/src/menu/main/mod.rs

@@ -5,6 +5,7 @@ use super::char_selection::CharSelectionState;
 use crate::{
     window::{Event, Window},
     GlobalState, PlayState, PlayStateResult,
+    singleplayer::Singleplayer,
 };
 use client_init::{ClientInit, Error as InitError};
 use common::{clock::Clock, comp};
@@ -101,7 +102,10 @@ impl PlayState for MainMenuState {
                                 300,
                             ),
                         )));
-                    }
+                    },
+                    MainMenuEvent::StartSingleplayer => {
+                        global_state.singleplayer = Some(Singleplayer::new());
+                    },
                     MainMenuEvent::Quit => return PlayStateResult::Shutdown,
                 }
             }

voxygen/src/menu/main/ui.rs

@@ -107,6 +107,7 @@ pub enum Event {
         username: String,
         server_address: String,
     },
+    StartSingleplayer,
     Quit,
 }
 
@@ -189,6 +190,20 @@ impl MainMenuUi {
                 });
             };
         }
+
+        //Singleplayer
+        //Used when the singleplayer button is pressed
+        macro_rules! singleplayer {
+            () => {
+                self.login_error = None;
+                events.push(Event::StartSingleplayer);
+                events.push(Event::LoginAttempt {
+                    username: "singleplayer".to_string(),
+                    server_address: "localhost".to_string(),
+                });
+            };
+        }
+
         const TEXT_COLOR: Color = Color::Rgba(1.0, 1.0, 1.0, 1.0);
         // Username
         // TODO: get a lower resolution and cleaner input_bg.png
@@ -327,6 +342,7 @@ impl MainMenuUi {
             .set(self.ids.singleplayer_button, ui_widgets)
             .was_clicked()
         {
+            singleplayer!();
             login!();
         }
         // Quit