Add visibility-related functions to window

src/lib.rs

@@ -74,6 +74,7 @@ pub struct WindowBuilder {
     monitor: Option<winimpl::MonitorID>,
     gl_version: Option<(uint, uint)>,
     vsync: bool,
+    visible: bool,
 }
 
 #[cfg(feature = "window")]
@@ -86,6 +87,7 @@ impl WindowBuilder {
             monitor: None,
             gl_version: None,
             vsync: false,
+            visible: true,
         }
     }
 
@@ -127,6 +129,12 @@ impl WindowBuilder {
         self
     }
 
+    /// Sets whether the window will be initially hidden or visible.
+    pub fn with_visibility(mut self, visible: bool) -> WindowBuilder {
+        self.visible = visible;
+        self
+    }
+
     /// Builds the window.
     ///
     /// Error should be very rare and only occur in case of permission denied, incompatible system,
@@ -252,6 +260,28 @@ impl Window {
         self.window.set_title(title)
     }
 
+    /// Shows the window if it was hidden.
+    ///
+    /// ## Platform-specific
+    ///
+    /// - Has no effect on Android
+    ///
+    #[inline]
+    pub fn show(&self) {
+        self.window.show()
+    }
+
+    /// Hides the window if it was visible.
+    ///
+    /// ## Platform-specific
+    ///
+    /// - Has no effect on Android
+    ///
+    #[inline]
+    pub fn hide(&self) {
+        self.window.hide()
+    }
+
     /// Returns the position of the top-left hand corner of the window relative to the
     ///  top-left hand corner of the desktop.
     ///