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`"]
@@ -824,6 +836,9 @@ pub struct WindowInfo {
 
     /// Current monitor size in egui points (logical pixels)
     pub monitor_size: Option<egui::Vec2>,
+
+    /// Are we in maximize mode?
+    pub maximized: bool,
 }
 
 /// Information about the URL.
@@ -1001,5 +1016,13 @@ 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

@@ -41,6 +41,7 @@ pub fn read_window_info(window: &winit::window::Window, pixels_per_point: f32) -
             y: size.height,
         },
         monitor_size,
+        maximized: window.is_maximized(),
     }
 }
 
@@ -148,6 +149,8 @@ pub fn handle_app_output(
         window_pos,
         visible,
         always_on_top,
+        minimized,
+        maximized,
     } = app_output;
 
     if let Some(decorated) = decorated {
@@ -190,6 +193,14 @@ 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

@@ -83,15 +83,6 @@ 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 +95,39 @@ 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 is_maximized = frame.info().window_info.maximized;
+            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(if is_maximized { "🗗" } else { "🗖" }).size(height - 4.0))
+                    .frame(false),
+            );
+            if maximized_response.clicked() {
+                frame.set_maximized(!is_maximized);
+            }
+
             // Add the contents:
             let content_rect = {
                 let mut rect = rect;