commit fb724d5def1c8483d37539223ae6f9d320563ffc
Author: Aaron Gorodetzky <aaron@nytework.com>
Date:   Sun Jan 14 22:23:28 2024 -0600

    Initial Commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..64024f4
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diff --git a/relm4_example/Cargo.lock b/relm4_example/Cargo.lock
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diff --git a/relm4_example/examples/components/Cargo.toml b/relm4_example/examples/components/Cargo.toml
new file mode 100644
index 0000000..9d5721a
--- /dev/null
+++ b/relm4_example/examples/components/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "components"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+relm4 = { version = "0.7.0-beta.2" }
diff --git a/relm4_example/examples/components/src/close_dialog.rs b/relm4_example/examples/components/src/close_dialog.rs
new file mode 100644
index 0000000..7f79adc
--- /dev/null
+++ b/relm4_example/examples/components/src/close_dialog.rs
@@ -0,0 +1,61 @@
+use gtk::prelude::{GtkWindowExt, WidgetExt, DialogExt};
+use relm4::{gtk, SimpleComponent, ComponentSender, ComponentParts};
+
+pub struct DialogModel {
+    hidden: bool,
+}
+
+#[derive(Debug)]
+pub enum DialogInput {
+    Show,
+    Accept,
+    Cancel,
+}
+
+#[derive(Debug)]
+pub enum DialogOutput {
+    Close,
+}
+
+#[relm4::component(pub)]
+impl SimpleComponent for DialogModel {
+    type Init = bool;
+    type Input = DialogInput;
+    type Output = DialogOutput;
+
+    view! {
+        gtk::MessageDialog {
+            set_modal: true,
+            #[watch]
+            set_visible: !model.hidden,
+            set_text: Some("Do you want to close before saving?"),
+            set_secondary_text: Some("All unsaved changes will be lost!"),
+            add_button: ("Close", gtk::ResponseType::Accept),
+            add_button: ("Cancel", gtk::ResponseType::Cancel),
+            connect_response[sender] => move |_, resp| {
+                sender.input(if resp == gtk::ResponseType::Accept {
+                    DialogInput::Accept
+                } else {
+                    DialogInput::Cancel
+                })
+            }
+        }
+    }
+
+    fn init(params: Self::Init, root: &Self::Root, sender: ComponentSender<Self>) -> ComponentParts<Self> {
+        let model = DialogModel { hidden: params };
+        let widgets = view_output!();
+        ComponentParts { model, widgets }
+    }
+
+    fn update(&mut self, msg: Self::Input, sender: ComponentSender<Self>) {
+        match msg {
+            DialogInput::Show => self.hidden = false,
+            DialogInput::Accept => {
+                self.hidden = true;
+                sender.output(DialogOutput::Close).unwrap();
+            }
+            DialogInput::Cancel => self.hidden = true,
+        }
+    }
+}
diff --git a/relm4_example/examples/components/src/header.rs b/relm4_example/examples/components/src/header.rs
new file mode 100644
index 0000000..ff497f3
--- /dev/null
+++ b/relm4_example/examples/components/src/header.rs
@@ -0,0 +1,65 @@
+use gtk::prelude::{ButtonExt, ToggleButtonExt, WidgetExt};
+use relm4::{gtk, SimpleComponent, ComponentSender, ComponentParts};
+
+pub struct HeaderModel;
+
+#[derive(Debug)]
+pub enum HeaderOutput {
+    View,
+    Edit,
+    Export,
+}
+
+#[relm4::component(pub)]
+impl SimpleComponent for HeaderModel {
+    type Init = ();
+    type Input = ();
+    type Output = HeaderOutput;
+
+    view! {
+        #[root]
+        gtk::HeaderBar {
+            #[wrap(Some)]
+            set_title_widget = &gtk::Box {
+                add_css_class: "linked",
+
+                #[name = "group"]
+                gtk::ToggleButton {
+                    set_label: "View",
+                    set_active: true,
+                    connect_toggled[sender] => move |btn| {
+                        if btn.is_active() {
+                            sender.output(HeaderOutput::View).unwrap()
+                        }
+                    },
+                },
+
+                gtk::ToggleButton {
+                    set_label: "Edit",
+                    set_group: Some(&group),
+                    connect_toggled[sender] => move |btn| {
+                        if btn.is_active() {
+                            sender.output(HeaderOutput::Edit).unwrap()
+                        }
+                    }
+                },
+
+                gtk::ToggleButton {
+                    set_label: "Export",
+                    set_group: Some(&group),
+                    connect_toggled[sender] => move |btn| {
+                        if btn.is_active() {
+                            sender.output(HeaderOutput::Export).unwrap()
+                        }
+                    }
+                },
+            }
+        }
+    }
+
+    fn init(_params: Self::Init, root: &Self::Root, sender: ComponentSender<Self>) -> ComponentParts<Self> {
+        let model = HeaderModel;
+        let widgets = view_output!();
+        ComponentParts { model, widgets }
+    }
+}
diff --git a/relm4_example/examples/components/src/main.rs b/relm4_example/examples/components/src/main.rs
new file mode 100644
index 0000000..4d6d394
--- /dev/null
+++ b/relm4_example/examples/components/src/main.rs
@@ -0,0 +1,97 @@
+mod header;
+mod close_dialog;
+
+use gtk::prelude::{GtkWindowExt, ApplicationExt};
+use relm4::{gtk::{self, glib}, SimpleComponent, ComponentSender, ComponentParts, Controller, ComponentController, Component, RelmApp};
+use header::{HeaderModel, HeaderOutput};
+use close_dialog::{DialogModel, DialogInput, DialogOutput};
+
+#[derive(Debug)]
+enum AppMode {
+    View,
+    Edit,
+    Export,
+}
+
+#[derive(Debug)]
+enum AppMsg {
+    SetMode(AppMode),
+    CloseRequest,
+    Close,
+}
+
+struct AppModel {
+    mode: AppMode,
+    header: Controller<HeaderModel>,
+    dialog: Controller<DialogModel>,
+}
+
+#[relm4::component]
+impl SimpleComponent for AppModel {
+    type Init = AppMode;
+    type Input = AppMsg;
+    type Output = ();
+
+    view! {
+        main_window = gtk::Window {
+            set_default_width: 500,
+            set_default_height: 250,
+            set_titlebar: Some(model.header.widget()),
+
+            gtk::Label {
+                #[watch]
+                set_label: &format!("Placeholder for {:?}", model.mode),
+            },
+
+            connect_close_request[sender] => move |_| {
+                sender.input(AppMsg::CloseRequest);
+                glib::Propagation::Proceed
+            }
+        }
+    }
+
+    fn init(params: Self::Init, root: &Self::Root, sender: ComponentSender<Self>) -> ComponentParts<Self> {
+        let header: Controller<HeaderModel> = HeaderModel::builder()
+            .launch(())
+            .forward(sender.input_sender(), |msg| match msg {
+                HeaderOutput::View => AppMsg::SetMode(AppMode::View),
+                HeaderOutput::Edit => AppMsg::SetMode(AppMode::Edit),
+                HeaderOutput::Export => AppMsg::SetMode(AppMode::Export),
+            });
+
+        let dialog = DialogModel::builder()
+            .transient_for(root)
+            .launch(true)
+            .forward(sender.input_sender(), |msg| match msg {
+                DialogOutput::Close => AppMsg::Close,
+            });
+
+        let model = AppModel {
+            mode: params,
+            header,
+            dialog,
+        };
+
+        let widgets = view_output!();
+        ComponentParts { model, widgets }
+    }
+
+    fn update(&mut self, msg: Self::Input, _sender: ComponentSender<Self>) {
+        match msg {
+            AppMsg::SetMode(mode) => {
+                self.mode = mode;
+            }
+            AppMsg::CloseRequest => {
+                self.dialog.sender().send(DialogInput::Show).unwrap();
+            }
+            AppMsg::Close => {
+                relm4::main_application().quit();
+            }
+        }
+    }
+}
+
+fn main() {
+    let relm = RelmApp::new("relm4.test.components");
+    relm.run::<AppModel>(AppMode::Edit);
+}
diff --git a/relm4_example/examples/counter_basic.rs b/relm4_example/examples/counter_basic.rs
new file mode 100644
index 0000000..ccaaedc
--- /dev/null
+++ b/relm4_example/examples/counter_basic.rs
@@ -0,0 +1,89 @@
+use gtk::glib::clone;
+use gtk::prelude::{BoxExt, ButtonExt, GtkWindowExt};
+use relm4::{gtk, ComponentParts, ComponentSender, RelmApp, RelmWidgetExt, SimpleComponent};
+
+#[derive(Debug)]
+enum AppInput {
+    Increment,
+    Decrement,
+}
+
+struct AppModel {
+    counter: u8,
+}
+
+struct AppWidgets {
+    label: gtk::Label,
+}
+
+impl SimpleComponent for AppModel {
+    type Input = AppInput;
+    type Output = ();
+    type Init = u8;
+    type Root = gtk::Window;
+    type Widgets = AppWidgets;
+
+    fn init_root() -> Self::Root {
+        gtk::Window::builder()
+            .title("Simple App")
+            .default_width(300)
+            .default_height(100)
+            .build()
+    }
+
+    fn init(
+        counter: Self::Init,
+        window: &Self::Root,
+        sender: ComponentSender<Self>,
+    ) -> relm4::ComponentParts<Self> {
+        let model = AppModel { counter };
+
+        let vbox = gtk::Box::builder()
+            .orientation(gtk::Orientation::Vertical)
+            .spacing(5)
+            .build();
+
+        let inc_button = gtk::Button::with_label("Increment");
+        let dec_button = gtk::Button::with_label("Decrement");
+
+        let label = gtk::Label::new(Some(&format!("Counter: {}", model.counter)));
+        label.set_margin_all(5);
+
+        window.set_child(Some(&vbox));
+        vbox.set_margin_all(5);
+        vbox.append(&inc_button);
+        vbox.append(&dec_button);
+        vbox.append(&label);
+
+        inc_button.connect_clicked(clone!(@strong sender => move |_| {
+            sender.input(AppInput::Increment);
+        }));
+        dec_button.connect_clicked(clone!(@strong sender => move |_| {
+            sender.input(AppInput::Decrement);
+        }));
+
+        let widgets = AppWidgets { label };
+
+        ComponentParts { model, widgets }
+    }
+
+    fn update(&mut self, message: Self::Input, _sender: ComponentSender<Self>) {
+        match message {
+            AppInput::Increment => {
+                self.counter = self.counter.wrapping_add(1);
+            }
+            AppInput::Decrement => {
+                self.counter = self.counter.wrapping_sub(1);
+            }
+        }
+    }
+
+    fn update_view(&self, widgets: &mut Self::Widgets, _sender: ComponentSender<Self>) {
+        widgets.label.set_label(&format!("Counter: {}", self.counter));
+    }
+}
+
+fn main() {
+    let app = RelmApp::new("relm4.test.simple_manual");
+    app.run::<AppModel>(0);
+}
diff --git a/relm4_example/examples/counter_factory/Cargo.lock b/relm4_example/examples/counter_factory/Cargo.lock
new file mode 100644
index 0000000..8ac631f
--- /dev/null
+++ b/relm4_example/examples/counter_factory/Cargo.lock
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diff --git a/relm4_example/examples/counter_factory/Cargo.toml b/relm4_example/examples/counter_factory/Cargo.toml
new file mode 100644
index 0000000..3e8ea2c
--- /dev/null
+++ b/relm4_example/examples/counter_factory/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "counter_factory"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+relm4 = { version = "0.7.0-beta.2" }
diff --git a/relm4_example/examples/counter_factory/src/counter.rs b/relm4_example/examples/counter_factory/src/counter.rs
new file mode 100644
index 0000000..f6bdd1d
--- /dev/null
+++ b/relm4_example/examples/counter_factory/src/counter.rs
@@ -0,0 +1,91 @@
+use gtk::prelude::{BoxExt, ButtonExt, OrientableExt};
+use relm4::factory::{DynamicIndex, FactoryComponent, FactorySender};
+use relm4::gtk;
+
+#[derive(Debug)]
+pub struct Counter {
+    value: u8,
+}
+
+#[derive(Debug)]
+pub enum CounterMsg {
+    Increment,
+    Decrement,
+}
+
+#[derive(Debug)]
+pub enum CounterOutput {
+    SendFront(DynamicIndex),
+    MoveUp(DynamicIndex),
+    MoveDown(DynamicIndex),
+}
+
+#[relm4::factory(pub)]
+impl FactoryComponent for Counter {
+    type Init = u8;
+    type Input = CounterMsg;
+    type Output = CounterOutput;
+    type CommandOutput = ();
+    type ParentWidget = gtk::Box;
+
+    view! {
+        root = gtk::Box {
+            set_orientation: gtk::Orientation::Horizontal,
+            set_spacing: 10,
+
+            #[name(label)]
+            gtk::Label {
+                #[watch]
+                set_label: &self.value.to_string(),
+                set_width_chars: 3,
+            },
+
+            #[name(add_button)]
+            gtk::Button {
+                set_label: "+",
+                connect_clicked => CounterMsg::Increment,
+            },
+
+            #[name(remove_button)]
+            gtk::Button {
+                set_label: "-",
+                connect_clicked => CounterMsg::Decrement,
+            },
+
+            #[name(move_up_button)]
+            gtk::Button {
+                set_label: "Up",
+                connect_clicked[sender, index] => move |_| {
+                    sender.output(CounterOutput::MoveUp(index.clone())).unwrap();
+                }
+            },
+
+            #[name(move_down_button)]
+            gtk::Button {
+                set_label: "Down",
+                connect_clicked[sender, index] => move |_| {
+                    sender.output(CounterOutput::MoveDown(index.clone())).unwrap();
+                }
+            },
+
+            #[name(to_front_button)]
+            gtk::Button {
+                set_label: "To Start",
+                connect_clicked[sender, index] => move |_| {
+                    sender.output(CounterOutput::SendFront(index.clone())).unwrap();
+                }
+            }
+        }
+    }
+
+    fn init_model(value: Self::Init, _index: &DynamicIndex, _sender: FactorySender<Self>) -> Self {
+        Self { value }
+    }
+
+    fn update(&mut self, msg: Self::Input, _sender: FactorySender<Self>) {
+        match msg {
+            CounterMsg::Increment => self.value = self.value.wrapping_add(1),
+            CounterMsg::Decrement => self.value = self.value.wrapping_sub(1),
+        }
+    }
+}
diff --git a/relm4_example/examples/counter_factory/src/main.rs b/relm4_example/examples/counter_factory/src/main.rs
new file mode 100644
index 0000000..20a40ae
--- /dev/null
+++ b/relm4_example/examples/counter_factory/src/main.rs
@@ -0,0 +1,107 @@
+mod counter;
+use counter::{Counter, CounterOutput};
+
+use gtk::prelude::{BoxExt, ButtonExt, GtkWindowExt, OrientableExt};
+use relm4::{gtk, factory::{FactoryVecDeque, DynamicIndex}, RelmApp, ComponentParts, ComponentSender, SimpleComponent};
+
+struct App {
+    created_widgets: u8,
+    counters: FactoryVecDeque<Counter>,
+}
+
+#[derive(Debug)]
+pub enum AppMsg {
+    AddCounter,
+    RemoveCounter,
+    SendFront(DynamicIndex),
+    MoveUp(DynamicIndex),
+    MoveDown(DynamicIndex),
+}
+
+#[relm4::component]
+impl SimpleComponent for App {
+    type Init = u8;
+    type Input = AppMsg;
+    type Output = ();
+
+    view! {
+        gtk::Window {
+            set_title: Some("Factory Example"),
+            set_default_size: (300, 100),
+
+            gtk::Box {
+                set_orientation: gtk::Orientation::Vertical,
+                set_spacing: 5,
+
+                gtk::Button {
+                    set_label: "Add Counter",
+                    connect_clicked => AppMsg::AddCounter,
+                },
+
+                gtk::Button {
+                    set_label: "Remove Counter",
+                    connect_clicked => AppMsg::RemoveCounter,
+                },
+
+                #[local_ref]
+                counter_box -> gtk::Box {
+                    set_orientation: gtk::Orientation::Vertical,
+                    set_spacing: 5,
+                }
+            }
+        }
+    }
+
+    fn init(counter: Self::Init, root: &Self::Root, sender: ComponentSender<Self>) -> ComponentParts<Self> {
+        let counters = FactoryVecDeque::builder()
+            .launch_default()
+            .forward(sender.input_sender(), |msg| match msg {
+                CounterOutput::SendFront(index) => AppMsg::SendFront(index),
+                CounterOutput::MoveUp(index) => AppMsg::MoveUp(index),
+                CounterOutput::MoveDown(index) => AppMsg::MoveDown(index),
+            });
+        let model = App {
+            created_widgets: counter,
+            counters,
+        };
+
+        let counter_box = model.counters.widget();
+        let widgets = view_output!();
+
+        ComponentParts { model, widgets }
+    }
+
+    fn update(&mut self, msg: Self::Input, _sender: ComponentSender<Self>) {
+        let mut counters_guard = self.counters.guard();
+        match msg {
+            AppMsg::AddCounter => {
+                counters_guard.push_back(self.created_widgets);
+                self.created_widgets = self.created_widgets.wrapping_add(1);
+            }
+            AppMsg::RemoveCounter => {
+                counters_guard.pop_back();
+            }
+            AppMsg::SendFront(index) => {
+                counters_guard.move_front(index.current_index());
+            }
+            AppMsg::MoveDown(index) => {
+                let index = index.current_index();
+                let new_index = index + 1;
+                if new_index < counters_guard.len() {
+                    counters_guard.move_to(index, new_index);
+                }
+            }
+            AppMsg::MoveUp(index) => {
+                let index = index.current_index();
+                if index != 0 {
+                    counters_guard.move_to(index, index - 1);
+                }
+            }
+        }
+    }
+}
+
+fn main() {
+    let app = RelmApp::new("relm4.example.factory");
+    app.run::<App>(0);
+}
diff --git a/relm4_example/examples/counter_macro.rs b/relm4_example/examples/counter_macro.rs
new file mode 100644
index 0000000..0f17eff
--- /dev/null
+++ b/relm4_example/examples/counter_macro.rs
@@ -0,0 +1,81 @@
+use gtk::prelude::{BoxExt, ButtonExt, GtkWindowExt, OrientableExt};
+use relm4::{gtk, ComponentParts, ComponentSender, RelmApp, RelmWidgetExt, SimpleComponent};
+
+struct CounterModel {
+    counter: u8,
+}
+
+#[derive(Debug)]
+enum CounterMessage {
+    Increment,
+    Decrement,
+}
+
+#[relm4::component]
+impl SimpleComponent for CounterModel {
+    type Init = u8;
+
+    type Input = CounterMessage;
+    type Output = ();
+
+    view! {
+        gtk::Window {
+            set_title: Some("Counter"),
+            set_default_width: 300,
+            set_default_height: 100,
+
+            gtk::Box {
+                set_orientation: gtk::Orientation::Vertical,
+                set_spacing: 5,
+                set_margin_all: 5,
+
+                gtk::Button {
+                    set_label: "Increment",
+                    connect_clicked[sender] => move |_| {
+                        sender.input(CounterMessage::Increment);
+                    }
+                },
+
+                gtk::Button::with_label("Decrement") {
+                    connect_clicked[sender] => move |_| {
+                        sender.input(CounterMessage::Decrement);
+                    }
+                },
+
+                gtk::Label {
+                    #[watch]
+                    set_label: &format!("Counter: {}", model.counter),
+                    set_margin_all: 5,
+                },
+
+                if model.counter % 2 == 0 {
+                    gtk::Label {
+                        set_label: "The value is even",
+                    }
+                } else {
+                    gtk::Label {
+                        set_label: "The value is odd",
+                    }
+                }
+            }
+        }
+    }
+
+    fn init(counter: Self::Init, root: &Self::Root, sender: ComponentSender<Self>) -> ComponentParts<Self> {
+        let model = CounterModel { counter };
+        let widgets = view_output!();
+        ComponentParts { model, widgets }
+    }
+
+    fn update(&mut self, msg: Self::Input, _sender: ComponentSender<Self>) {
+        match msg {
+            CounterMessage::Increment => self.counter = self.counter.wrapping_add(1),
+            CounterMessage::Decrement => self.counter = self.counter.wrapping_sub(1),
+        }
+    }
+}
+
+fn main() {
+    let app = RelmApp::new("relm4.test.simple");
+    app.run::<CounterModel>(0);
+}
diff --git a/relm4_example/examples/paned.rs b/relm4_example/examples/paned.rs
new file mode 100644
index 0000000..158b2d4
--- /dev/null
+++ b/relm4_example/examples/paned.rs
@@ -0,0 +1,55 @@
+use gtk::prelude::*;
+use relm4::{gtk, ComponentParts, ComponentSender, RelmApp, SimpleComponent};
+
+struct PanedModel {}
+
+#[derive(Debug)]
+enum PanedMessage {}
+
+#[relm4::component]
+impl SimpleComponent for PanedModel {
+    type Init = ();
+    type Input = PanedMessage;
+    type Output = ();
+
+    view! {
+        gtk::Window {
+            set_title: Some("Paned Example"),
+            set_default_width: 300,
+            set_default_height: 200,
+
+            gtk::Paned {
+                set_orientation: gtk::Orientation::Horizontal,
+                set_resize_start_child: false,
+                set_shrink_start_child: false,
+                set_resize_end_child: true,
+
+                #[wrap(Some)]
+                set_start_child = &gtk::Label {
+                    set_label: "Left Side",
+                    set_size_request: (100, -1)
+                },
+
+                #[wrap(Some)]
+                set_end_child = &gtk::Label {
+                    set_label: "Right Side"
+                }
+            }
+        }
+    }
+
+    fn init(_: Self::Init, root: &Self::Root, _sender: ComponentSender<Self>) -> ComponentParts<Self> {
+        let model = PanedModel {};
+        let widgets = view_output!();
+        ComponentParts { model, widgets }
+    }
+
+    fn update(&mut self, _msg: Self::Input, _sender: ComponentSender<Self>) {
+        // No update logic needed for this static UI
+    }
+}
+
+fn main() {
+    let app = RelmApp::new("relm4.test.paned");
+    app.run::<PanedModel>(());
+}
diff --git a/relm4_example/src/main.rs b/relm4_example/src/main.rs
new file mode 100644
index 0000000..2d46f33
--- /dev/null
+++ b/relm4_example/src/main.rs
@@ -0,0 +1,22 @@
+use relm4::gtk::{Application, ApplicationWindow, prelude::{ApplicationExt, GtkWindowExt, ButtonExt, WidgetExt, ApplicationExtManual}};
+use tgbutton::CustomButton;
+
+mod tgbutton;
+
+fn main() {
+    let application = Application::new(Some("com.example.custombutton"), Default::default());
+
+    application.connect_activate(|app| {
+        let window = ApplicationWindow::new(app);
+        window.set_title(Some("Custom Button Example"));
+        window.set_default_size(300, 100);
+
+        let custom_button = CustomButton::new();
+        custom_button.set_label("Custom Button");
+
+        window.set_child(Some(&custom_button));
+        window.show();
+    });
+
+    application.run();
+}
diff --git a/relm4_example/src/tgbutton.rs b/relm4_example/src/tgbutton.rs
new file mode 100644
index 0000000..92ce3f5
--- /dev/null
+++ b/relm4_example/src/tgbutton.rs
@@ -0,0 +1,61 @@
+use relm4::gtk;
+use gtk::glib;
+use gtk::prelude::*;
+use gtk::subclass::prelude::*;
+use gtk::Button;
+
+mod imp {
+    use super::*;
+    
+    #[derive(Default)]
+    pub struct CustomButton;
+
+    #[glib::object_subclass]
+    impl ObjectSubclass for CustomButton {
+        const NAME: &'static str = "CustomButton";
+        type Type = super::CustomButton;
+        type ParentType = Button;
+    }
+
+    impl ObjectImpl for CustomButton {}
+    impl WidgetImpl for CustomButton {
+        fn snapshot(&self, widget: &Self::Type, snapshot: &gtk::Snapshot) {
+            self.parent_snapshot(widget, snapshot);
+
+            let rect = widget.allocation();
+            let surface = cairo::ImageSurface::create(cairo::Format::ARgb32, rect.width(), rect.height())
+                .expect("Can't create surface");
+            let cr = cairo::Context::new(&surface).expect("Can't create context");
+
+            // Draw the hollow circle
+            cr.set_source_rgb(1.0, 0.0, 0.0); // Red color
+            cr.set_line_width(5.0); // Line width for the circle
+            cr.arc(
+                (rect.width() / 2) as f64,
+                (rect.height() / 2) as f64,
+                22.5, // Radius
+                0.0,
+                2.0 * std::f64::consts::PI,
+            );
+            cr.stroke();
+
+            // Draw on the widget
+            let snapshot_rect = gtk::gdk::Rectangle::new(rect.x(), rect.y(), rect.width(), rect.height());
+            snapshot.append_cairo(&snapshot_rect, &surface);
+        }
+    }
+
+    impl ButtonImpl for CustomButton {}
+}
+
+glib::wrapper! {
+    pub struct CustomButton(ObjectSubclass<imp::CustomButton>)
+        @extends Button, gtk::Widget;
+}
+
+impl CustomButton {
+    pub fn new() -> Self {
+        glib::Object::new(&[]).expect("Failed to create CustomButton")
+    }
+}
+pub use imp::CustomButton;