eframe: add set_minimized and set_maximized

crates/eframe/src/epi.rs

@@ -711,6 +711,18 @@ impl Frame {
         self.output.close = true;
     }
 
+    /// Minimize or unminimize window. (native only)
+    #[cfg(not(target_arch = "wasm32"))]
+    pub fn set_minimized(&mut self, minimized: bool) {
+        self.output.minimized = Some(minimized);
+    }
+
+    /// Maximize or unmaximize window. (native only)
+    #[cfg(not(target_arch = "wasm32"))]
+    pub fn set_maximized(&mut self, maximized: bool) {
+        self.output.maximized = Some(maximized);
+    }
+
     /// Tell `eframe` to close the desktop window.
     #[cfg(not(target_arch = "wasm32"))]
     #[deprecated = "Renamed `close`"]
@@ -1001,5 +1013,13 @@ pub(crate) mod backend {
         /// Set to some bool to tell the window always on top.
         #[cfg(not(target_arch = "wasm32"))]
         pub always_on_top: Option<bool>,
+
+        /// Set to some bool to minimize or unminimize window.
+        #[cfg(not(target_arch = "wasm32"))]
+        pub minimized: Option<bool>,
+
+        /// Set to some bool to maximize or unmaximize window.
+        #[cfg(not(target_arch = "wasm32"))]
+        pub maximized: Option<bool>,
     }
 }

crates/eframe/src/native/epi_integration.rs

@@ -148,6 +148,8 @@ pub fn handle_app_output(
         window_pos,
         visible,
         always_on_top,
+        minimized,
+        maximized,
     } = app_output;
 
     if let Some(decorated) = decorated {
@@ -190,6 +192,14 @@ pub fn handle_app_output(
     if let Some(always_on_top) = always_on_top {
         window.set_always_on_top(always_on_top);
     }
+
+    if let Some(minimized) = minimized {
+        window.set_minimized(minimized)
+    }
+
+    if let Some(maximized) = maximized {
+        window.set_maximized(maximized);
+    }
 }
 
 // ----------------------------------------------------------------------------

examples/custom_window_frame/src/main.rs

@@ -21,15 +21,17 @@ fn main() {
 }
 
 #[derive(Default)]
-struct MyApp {}
+struct MyApp {
+    maximized: bool,
+}
 
 impl eframe::App for MyApp {
     fn clear_color(&self, _visuals: &egui::Visuals) -> egui::Rgba {
         egui::Rgba::TRANSPARENT // Make sure we don't paint anything behind the rounded corners
     }
 
     fn update(&mut self, ctx: &egui::Context, frame: &mut eframe::Frame) {
-        custom_window_frame(ctx, frame, "egui with custom frame", |ui| {
+        custom_window_frame(self, ctx, frame, "egui with custom frame", |ui| {
             ui.label("This is just the contents of the window");
             ui.horizontal(|ui| {
                 ui.label("egui theme:");
@@ -40,6 +42,7 @@ impl eframe::App for MyApp {
 }
 
 fn custom_window_frame(
+    app: &mut MyApp,
     ctx: &egui::Context,
     frame: &mut eframe::Frame,
     title: &str,
@@ -83,15 +86,6 @@ fn custom_window_frame(
                 Stroke::new(1.0, text_color),
             );
 
-            // Add the close button:
-            let close_response = ui.put(
-                Rect::from_min_size(rect.left_top(), Vec2::splat(height)),
-                Button::new(RichText::new("❌").size(height - 4.0)).frame(false),
-            );
-            if close_response.clicked() {
-                frame.close();
-            }
-
             // Interact with the title bar (drag to move window):
             let title_bar_rect = {
                 let mut rect = rect;
@@ -104,6 +98,38 @@ fn custom_window_frame(
                 frame.drag_window();
             }
 
+            // Add the close button:
+            let close_response = ui.put(
+                Rect::from_min_size(rect.left_top(), Vec2::splat(height)),
+                Button::new(RichText::new("❌").size(height - 4.0)).frame(false),
+            );
+            if close_response.clicked() {
+                frame.close();
+            }
+
+            let minimized_response = ui.put(
+                Rect::from_min_size(
+                    rect.left_top() + vec2((height - 4.0) * 1.0, 0.0),
+                    Vec2::splat(height),
+                ),
+                Button::new(RichText::new("--").size(height - 4.0)).frame(false),
+            );
+            if minimized_response.clicked() {
+                frame.set_minimized(true);
+            }
+
+            let maximized_response = ui.put(
+                Rect::from_min_size(
+                    rect.left_top() + vec2((height - 4.0) * 2.0, 0.0),
+                    Vec2::splat(height),
+                ),
+                Button::new(RichText::new("O").size(height - 4.0)).frame(false),
+            );
+            if maximized_response.clicked() {
+                app.maximized = !app.maximized;
+                frame.set_maximized(app.maximized);
+            }
+
             // Add the contents:
             let content_rect = {
                 let mut rect = rect;