fix bug with ui using old win size when switching to previous playstate

Former-commit-id: b6c166882c978806af65f70496626fad33081975

voxygen/src/main.rs

@@ -39,6 +39,7 @@ impl GlobalState {
     /// effects a state may have made).
     pub fn on_play_state_changed(&mut self) {
         self.window.grab_cursor(false);
+        self.window.needs_refresh_resize();
     }
 }
 

voxygen/src/ui/mod.rs

@@ -53,6 +53,9 @@ impl Event {
             _ => false,
         }
     }
+    pub fn new_resize(dims: Vec2<f64>) -> Self {
+        Self(Input::Resize(dims.x, dims.y))
+    }
 }
 
 pub struct Cache {

voxygen/src/window.rs

@@ -15,6 +15,7 @@ pub struct Window {
     renderer: Renderer,
     window: glutin::GlWindow,
     cursor_grabbed: bool,
+    needs_refresh_resize: bool,
     key_map: HashMap<glutin::VirtualKeyCode, Key>,
 }
 
@@ -62,6 +63,7 @@ impl Window {
             )?,
             window,
             cursor_grabbed: false,
+            needs_refresh_resize: false,
             key_map,
         });
         tmp
@@ -71,6 +73,13 @@ impl Window {
     pub fn renderer_mut(&mut self) -> &mut Renderer { &mut self.renderer }
 
     pub fn fetch_events(&mut self) -> Vec<Event> {
+        let mut events = vec![];        
+        // Refresh ui size (used when changing playstates)
+        if self.needs_refresh_resize {
+            events.push(Event::Ui(ui::Event::new_resize(self.logical_size())));
+            self.needs_refresh_resize = false;
+        }
+
         // Copy data that is needed by the events closure to avoid lifetime errors
         // TODO: Remove this if/when the compiler permits it
         let cursor_grabbed = self.cursor_grabbed;
@@ -78,7 +87,6 @@ impl Window {
         let window = &mut self.window;
         let key_map = &self.key_map;
 
-        let mut events = vec![];
         self.events_loop.poll_events(|event| {
             // Get events for ui
             if let Some(event) = ui::Event::try_from(event.clone(), &window) {
@@ -142,6 +150,10 @@ impl Window {
             .expect("Failed to grab/ungrab cursor");
     }
 
+    pub fn needs_refresh_resize(&mut self) {
+        self.needs_refresh_resize = true;
+    }
+
     pub fn logical_size(&self) -> Vec2<f64> {
         let (w, h) = self.window.get_inner_size().unwrap_or(glutin::dpi::LogicalSize::new(0.0, 0.0)).into();
         Vec2::new(w, h)