Honoring Window::inner_size's initial value

Refs #160

CHANGELOG.md

@@ -23,6 +23,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   persist function.
 - Fixed a deadlock that could occur when multiple threads were attempting to
   execute change callbacks for the same dynamic at the same time.
+- The initial `inner_size` of a `Window` is now used if it is non-zero and
+  `WindowAttributes::inner_size` is `None`.
 
 ### Added
 

examples/unsaved-changes.rs

@@ -3,13 +3,16 @@ use cushy::{
     widget::MakeWidget,
     Run,
 };
+use figures::{units::UPx, Size};
 
 fn main() -> cushy::Result {
     let has_unsaved_changes = Dynamic::new(true);
+    let inner_size = Dynamic::new(Size::new(UPx::new(1000), UPx::new(800)));
 
     "Prevent Closing"
         .into_checkbox(has_unsaved_changes.clone())
         .into_window()
         .on_close_requested(move |()| !has_unsaved_changes.get())
+        .inner_size(inner_size)
         .run()
 }

src/window.rs

@@ -1828,6 +1828,12 @@ where
             attrs.preferred_theme = Some((*theme_mode).into());
         }
         attrs.title = settings.title.get();
+        if attrs.inner_size.is_none() {
+            let dynamic_inner = settings.inner_size.get();
+            if !dynamic_inner.is_zero() {
+                attrs.inner_size = Some(winit::dpi::Size::Physical(dynamic_inner.into()));
+            }
+        }
         attrs
     }