From 033884395010575f6fe0f435a6986cc1ccf5c11b Mon Sep 17 00:00:00 2001
From: Julian <hi@notnite.com>
Date: Thu, 21 Jul 2022 14:16:56 -0400
Subject: [PATCH] (eframe) add Frame.set_visible (#1808)

---
 eframe/src/epi.rs                    | 8 ++++++++
 eframe/src/native/epi_integration.rs | 5 +++++
 eframe/src/web/backend.rs            | 1 +
 3 files changed, 14 insertions(+)

diff --git a/eframe/src/epi.rs b/eframe/src/epi.rs
index b7e319b8..805efd4a 100644
--- a/eframe/src/epi.rs
+++ b/eframe/src/epi.rs
@@ -565,6 +565,11 @@ impl Frame {
         self.output.drag_window = true;
     }
 
+    /// Set the visibility of the window.
+    pub fn set_visible(&mut self, visible: bool) {
+        self.output.visible = Some(visible);
+    }
+
     /// for integrations only: call once per frame
     #[doc(hidden)]
     pub fn take_app_output(&mut self) -> backend::AppOutput {
@@ -740,5 +745,8 @@ pub mod backend {
 
         /// Set to some position to move the outer window (e.g. glium window) to this position
         pub window_pos: Option<egui::Pos2>,
+
+        /// Set to some bool to change window visibility.
+        pub visible: Option<bool>,
     }
 }
diff --git a/eframe/src/native/epi_integration.rs b/eframe/src/native/epi_integration.rs
index 597e0c85..a6a6d6e0 100644
--- a/eframe/src/native/epi_integration.rs
+++ b/eframe/src/native/epi_integration.rs
@@ -120,6 +120,7 @@ pub fn handle_app_output(
         decorated,
         drag_window,
         window_pos,
+        visible,
     } = app_output;
 
     if let Some(decorated) = decorated {
@@ -150,6 +151,10 @@ pub fn handle_app_output(
     if drag_window {
         let _ = window.drag_window();
     }
+
+    if let Some(visible) = visible {
+        window.set_visible(visible);
+    }
 }
 
 // ----------------------------------------------------------------------------
diff --git a/eframe/src/web/backend.rs b/eframe/src/web/backend.rs
index 4416eeaa..ecca55cb 100644
--- a/eframe/src/web/backend.rs
+++ b/eframe/src/web/backend.rs
@@ -300,6 +300,7 @@ impl AppRunner {
                 decorated: _,    // Can't toggle decorations
                 drag_window: _,  // Can't be dragged
                 window_pos: _,   // Can't set position of a web page
+                visible: _,      // Can't hide a web page
             } = app_output;
         }