Multiple changes I had to make for Ebou (#89)

* Add segmented control, icons, toolbar

* add to demos

* doc tests

* format code

* Additional SFSymbol definitions

examples/calculator/content_view.rs

@@ -16,7 +16,7 @@ pub fn button(text: &str, msg: Msg) -> Button {
     button.set_bordered(false);
     button.set_bezel_style(BezelStyle::SmallSquare);
     button.set_focus_ring_type(FocusRingType::None);
-    button.set_action(move || dispatch(msg.clone()));
+    button.set_action(move |_| dispatch(msg.clone()));
     button.set_key_equivalent(&*text.to_lowercase());
 
     let font = Font::system(22.);

examples/popover.rs

@@ -5,13 +5,15 @@
 //! - Another Controller / View
 
 use cacao::appkit::menu::{Menu, MenuItem};
+use cacao::appkit::segmentedcontrol::SegmentedControl;
 use cacao::appkit::window::{Window, WindowConfig, WindowController, WindowDelegate};
 use cacao::appkit::{App, AppDelegate};
 use cacao::button::Button;
+use cacao::foundation::NSArray;
 use cacao::geometry::{Edge, Rect};
+use cacao::image::Image;
 use cacao::layout::{Layout, LayoutConstraint};
 use cacao::notification_center::Dispatcher;
-use cacao::text::{Font, Label};
 use cacao::view::{Popover, PopoverConfig, View, ViewController, ViewDelegate};
 
 struct BasicApp {
@@ -124,7 +126,7 @@ impl ViewDelegate for PopoverExampleContentView {
 
     fn did_load(&mut self, view: cacao::view::View) {
         let mut button = Button::new("Show");
-        button.set_action(|| dispatch_ui(Msg::Click));
+        button.set_action(|_| dispatch_ui(Msg::Click));
 
         let controller = PopoverExampleContentViewController::new();
         let config = PopoverConfig {
@@ -164,16 +166,21 @@ impl Dispatcher for BasicApp {
 
 #[derive(Debug)]
 struct PopoverExampleContentViewController {
-    pub label: Label
+    pub control: SegmentedControl
 }
 
 impl PopoverExampleContentViewController {
     fn new() -> Self {
-        let label = Label::new();
-        let font = Font::system(20.);
-        label.set_font(&font);
-        label.set_text("Hello");
-        Self { label }
+        let images = NSArray::from(vec![
+            &*Image::symbol(cacao::image::SFSymbol::AtSymbol, "Hello").0,
+            &*Image::symbol(cacao::image::SFSymbol::PaperPlane, "Hello").0,
+            &*Image::symbol(cacao::image::SFSymbol::PaperPlaneFilled, "Hello").0,
+        ]);
+        let mut control = SegmentedControl::new(images, cacao::appkit::segmentedcontrol::TrackingMode::SelectOne);
+        control.set_action(|index| {
+            println!("Selected Index {index}");
+        });
+        Self { control }
     }
 }
 
@@ -181,6 +188,6 @@ impl ViewDelegate for PopoverExampleContentViewController {
     const NAME: &'static str = "PopoverExampleContentViewController";
 
     fn did_load(&mut self, view: View) {
-        view.add_subview(&self.label);
+        view.add_subview(&self.control);
     }
 }

examples/todos_list/add/view.rs

@@ -50,7 +50,7 @@ impl ViewDelegate for AddNewTodoContentView {
 
         let mut button = Button::new("Add");
         button.set_key_equivalent("\r");
-        button.set_action(|| dispatch_ui(Message::ProcessNewTodo));
+        button.set_action(|_| dispatch_ui(Message::ProcessNewTodo));
 
         view.add_subview(&instructions);
         view.add_subview(&input);

examples/todos_list/preferences/toggle_option_view.rs

@@ -2,6 +2,7 @@ use cacao::layout::{Layout, LayoutConstraint};
 use cacao::switch::Switch;
 use cacao::text::Label;
 use cacao::view::View;
+use objc::runtime::Object;
 
 /// A reusable widget for a toggle; this is effectively a standard checkbox/label combination for
 /// toggling a boolean value.
@@ -55,7 +56,7 @@ impl ToggleOptionView {
     /// can toggle your settings and such there.
     pub fn configure<F>(&mut self, text: &str, subtitle: &str, state: bool, handler: F)
     where
-        F: Fn() + Send + Sync + 'static
+        F: Fn(*const Object) + Send + Sync + 'static
     {
         self.title.set_text(text);
         self.subtitle.set_text(subtitle);

examples/todos_list/preferences/toolbar.rs

@@ -19,7 +19,7 @@ impl Default for PreferencesToolbar {
                 let icon = Image::toolbar_icon(MacSystemIcon::PreferencesGeneral, "General");
                 item.set_image(icon);
 
-                item.set_action(|| {
+                item.set_action(|_| {
                     dispatch_ui(Message::SwitchPreferencesToGeneralPane);
                 });
 
@@ -32,7 +32,7 @@ impl Default for PreferencesToolbar {
                 let icon = Image::toolbar_icon(MacSystemIcon::PreferencesAdvanced, "Advanced");
                 item.set_image(icon);
 
-                item.set_action(|| {
+                item.set_action(|_| {
                     dispatch_ui(Message::SwitchPreferencesToAdvancedPane);
                 });
 

examples/todos_list/storage/defaults.rs

@@ -1,6 +1,7 @@
 use std::collections::HashMap;
 
 use cacao::defaults::{UserDefaults, Value};
+use objc::runtime::Object;
 
 const EXAMPLE: &str = "exampleSetting";
 
@@ -25,7 +26,7 @@ impl Defaults {
     }
 
     /// Toggles the example setting.
-    pub fn toggle_should_whatever() {
+    pub fn toggle_should_whatever(_object: *const Object) {
         toggle_bool(EXAMPLE);
     }
 

examples/todos_list/todos/toolbar.rs

@@ -15,7 +15,7 @@ impl Default for TodosToolbar {
             item.set_title("Add Todo");
             item.set_button(Button::new("+ New"));
 
-            item.set_action(|| {
+            item.set_action(|_| {
                 dispatch_ui(Message::OpenNewTodoSheet);
             });
 

src/appkit/mod.rs

@@ -29,3 +29,4 @@ pub mod toolbar;
 pub mod window;
 
 pub mod haptics;
+pub mod segmentedcontrol;

src/appkit/segmentedcontrol.rs

@@ -0,0 +1,346 @@
+//! Wraps `NSSegmentedControl` on appkit
+
+use std::fmt;
+use std::sync::Once;
+
+use std::cell::RefCell;
+use std::rc::Rc;
+
+use objc::declare::ClassDecl;
+use objc::runtime::{Class, Object, Sel};
+use objc::{class, msg_send, sel, sel_impl};
+use objc_id::ShareId;
+
+use crate::color::Color;
+use crate::control::Control;
+use crate::foundation::{id, nil, NSArray, NSString, NSUInteger, BOOL, NO, YES};
+use crate::image::Image;
+use crate::invoker::TargetActionHandler;
+use crate::keys::Key;
+use crate::layout::Layout;
+use crate::objc_access::ObjcAccess;
+use crate::text::{AttributedString, Font};
+use crate::utils::{load, properties::ObjcProperty};
+
+#[cfg(feature = "autolayout")]
+use crate::layout::{LayoutAnchorDimension, LayoutAnchorX, LayoutAnchorY};
+
+#[cfg(feature = "appkit")]
+use crate::appkit::FocusRingType;
+
+/// Wraps `NSButton` on appkit, and `UIButton` on iOS and tvOS.
+///
+/// You'd use this type to create a button that a user can interact with. Buttons can be configured
+/// a number of ways, and support setting a callback to fire when they're clicked or tapped.
+///
+/// Some properties are platform-specific; see the documentation for further information.
+///
+/// ```rust,no_run
+/// use cacao::button::Button;
+/// use cacao::view::View;
+/// use crate::cacao::layout::Layout;
+/// let mut button = Button::new("My button title");
+/// button.set_key_equivalent("c");
+///
+/// button.set_action(|_| {
+///     println!("My button was clicked.");
+/// });
+/// let my_view : View<()> = todo!();
+///
+/// // Make sure you don't let your Button drop for as long as you need it.
+/// my_view.add_subview(&button);
+/// ```
+#[derive(Debug)]
+pub struct SegmentedControl {
+    /// A handle for the underlying Objective-C object.
+    pub objc: ObjcProperty,
+
+    /// Hold on to the images
+    images: NSArray,
+
+    handler: Option<TargetActionHandler>,
+
+    /// A pointer to the Objective-C runtime top layout constraint.
+    #[cfg(feature = "autolayout")]
+    pub top: LayoutAnchorY,
+
+    /// A pointer to the Objective-C runtime leading layout constraint.
+    #[cfg(feature = "autolayout")]
+    pub leading: LayoutAnchorX,
+
+    /// A pointer to the Objective-C runtime left layout constraint.
+    #[cfg(feature = "autolayout")]
+    pub left: LayoutAnchorX,
+
+    /// A pointer to the Objective-C runtime trailing layout constraint.
+    #[cfg(feature = "autolayout")]
+    pub trailing: LayoutAnchorX,
+
+    /// A pointer to the Objective-C runtime right layout constraint.
+    #[cfg(feature = "autolayout")]
+    pub right: LayoutAnchorX,
+
+    /// A pointer to the Objective-C runtime bottom layout constraint.
+    #[cfg(feature = "autolayout")]
+    pub bottom: LayoutAnchorY,
+
+    /// A pointer to the Objective-C runtime width layout constraint.
+    #[cfg(feature = "autolayout")]
+    pub width: LayoutAnchorDimension,
+
+    /// A pointer to the Objective-C runtime height layout constraint.
+    #[cfg(feature = "autolayout")]
+    pub height: LayoutAnchorDimension,
+
+    /// A pointer to the Objective-C runtime center X layout constraint.
+    #[cfg(feature = "autolayout")]
+    pub center_x: LayoutAnchorX,
+
+    /// A pointer to the Objective-C runtime center Y layout constraint.
+    #[cfg(feature = "autolayout")]
+    pub center_y: LayoutAnchorY
+}
+
+#[derive(Debug)]
+#[repr(u8)]
+pub enum TrackingMode {
+    SelectOne = 0,
+    SelectMany = 1,
+    SelectMomentary = 2
+}
+
+impl SegmentedControl {
+    /// Creates a new `NSSegmentedControl` instance, configures it appropriately,
+    /// and retains the necessary Objective-C runtime pointer.
+    pub fn new(images: NSArray, tracking_mode: TrackingMode) -> Self {
+        let view: id = unsafe {
+            let tracking_mode = tracking_mode as u8 as i32;
+            let control: id = msg_send![register_class(), segmentedControlWithImages:&*images trackingMode:tracking_mode
+                target:nil
+                action:nil
+            ];
+
+            let _: () = msg_send![control, setWantsLayer: YES];
+
+            #[cfg(feature = "autolayout")]
+            let _: () = msg_send![control, setTranslatesAutoresizingMaskIntoConstraints: NO];
+
+            control
+        };
+
+        SegmentedControl {
+            handler: None,
+
+            images,
+
+            #[cfg(feature = "autolayout")]
+            top: LayoutAnchorY::top(view),
+
+            #[cfg(feature = "autolayout")]
+            left: LayoutAnchorX::left(view),
+
+            #[cfg(feature = "autolayout")]
+            leading: LayoutAnchorX::leading(view),
+
+            #[cfg(feature = "autolayout")]
+            right: LayoutAnchorX::right(view),
+
+            #[cfg(feature = "autolayout")]
+            trailing: LayoutAnchorX::trailing(view),
+
+            #[cfg(feature = "autolayout")]
+            bottom: LayoutAnchorY::bottom(view),
+
+            #[cfg(feature = "autolayout")]
+            width: LayoutAnchorDimension::width(view),
+
+            #[cfg(feature = "autolayout")]
+            height: LayoutAnchorDimension::height(view),
+
+            #[cfg(feature = "autolayout")]
+            center_x: LayoutAnchorX::center(view),
+
+            #[cfg(feature = "autolayout")]
+            center_y: LayoutAnchorY::center(view),
+
+            objc: ObjcProperty::retain(view)
+        }
+    }
+
+    /// Select the segment at index
+    pub fn set_tooltip_segment(&mut self, index: NSUInteger, tooltip: &str) {
+        self.objc.with_mut(|obj| unsafe {
+            let converted = NSString::new(tooltip);
+            let _: () = msg_send![obj, setToolTip: converted forSegment: index];
+        })
+    }
+
+    /// Select the segment at index
+    pub fn select_segment(&mut self, index: NSUInteger) {
+        self.objc.with_mut(|obj| unsafe {
+            let _: () = msg_send![obj, setSelectedSegment: index];
+        })
+    }
+
+    /// Sets an image on the underlying button.
+    pub fn set_image_segment(&mut self, image: Image, segment: NSUInteger) {
+        self.objc.with_mut(|obj| unsafe {
+            let _: () = msg_send![obj, setImage:&*image.0 forSegment: segment];
+        });
+    }
+
+    /// Attaches a callback for button press events. Don't get too creative now...
+    /// best just to message pass or something.
+    pub fn set_action<F: Fn(i32) + Send + Sync + 'static>(&mut self, action: F) {
+        // @TODO: This probably isn't ideal but gets the job done for now; needs revisiting.
+        let this = self.objc.get(|obj| unsafe { ShareId::from_ptr(msg_send![obj, self]) });
+        let handler = TargetActionHandler::new(&*this, move |obj: *const Object| unsafe {
+            let selected: i32 = msg_send![obj, selectedSegment];
+            action(selected)
+        });
+        self.handler = Some(handler);
+    }
+
+    /// Call this to set the background color for the backing layer.
+    pub fn set_background_color<C: AsRef<Color>>(&self, color: C) {
+        let color: id = color.as_ref().into();
+
+        #[cfg(feature = "appkit")]
+        self.objc.with_mut(|obj| unsafe {
+            let cell: id = msg_send![obj, cell];
+            let _: () = msg_send![cell, setBackgroundColor: color];
+        });
+    }
+
+    /// Set a key to be bound to this button. When the key is pressed, the action coupled to this
+    /// button will fire.
+    pub fn set_key_equivalent<'a, K>(&self, key: K)
+    where
+        K: Into<Key<'a>>
+    {
+        let key: Key<'a> = key.into();
+
+        self.objc.with_mut(|obj| {
+            let keychar = match key {
+                Key::Char(s) => NSString::new(s),
+                Key::Delete => NSString::new("\u{08}")
+            };
+
+            unsafe {
+                let _: () = msg_send![obj, setKeyEquivalent:&*keychar];
+            }
+        });
+    }
+
+    /// Sets the text color for this button.
+    ///
+    /// On appkit, this is done by way of an `AttributedString` under the hood.
+    pub fn set_text_color<C: AsRef<Color>>(&self, color: C) {
+        #[cfg(feature = "appkit")]
+        self.objc.with_mut(move |obj| unsafe {
+            let text: id = msg_send![obj, attributedTitle];
+            let len: isize = msg_send![text, length];
+
+            let mut attr_str = AttributedString::wrap(text);
+            attr_str.set_text_color(color.as_ref(), 0..len);
+
+            let _: () = msg_send![obj, setAttributedTitle:&*attr_str];
+        });
+    }
+
+    // @TODO: Figure out how to handle oddities like this.
+    /// For buttons on appkit, one might need to disable the border. This does that.
+    #[cfg(feature = "appkit")]
+    pub fn set_bordered(&self, is_bordered: bool) {
+        self.objc.with_mut(|obj| unsafe {
+            let _: () = msg_send![obj, setBordered:match is_bordered {
+                true => YES,
+                false => NO
+            }];
+        });
+    }
+
+    /// Sets the font for this button.
+    pub fn set_font<F: AsRef<Font>>(&self, font: F) {
+        let font = font.as_ref().clone();
+
+        self.objc.with_mut(|obj| unsafe {
+            let _: () = msg_send![obj, setFont:&*font];
+        });
+    }
+
+    /// Sets how the control should draw a focus ring when a user is focused on it.
+    ///
+    /// This is an appkit-only method.
+    #[cfg(feature = "appkit")]
+    pub fn set_focus_ring_type(&self, focus_ring_type: FocusRingType) {
+        let ring_type: NSUInteger = focus_ring_type.into();
+
+        self.objc.with_mut(|obj| unsafe {
+            let _: () = msg_send![obj, setFocusRingType: ring_type];
+        });
+    }
+
+    /// Toggles the highlighted status of the button.
+    pub fn set_highlighted(&self, highlight: bool) {
+        self.objc.with_mut(|obj| unsafe {
+            let _: () = msg_send![obj, highlight:match highlight {
+                true => YES,
+                false => NO
+            }];
+        });
+    }
+}
+
+impl ObjcAccess for SegmentedControl {
+    fn with_backing_obj_mut<F: Fn(id)>(&self, handler: F) {
+        self.objc.with_mut(handler);
+    }
+
+    fn get_from_backing_obj<F: Fn(&Object) -> R, R>(&self, handler: F) -> R {
+        self.objc.get(handler)
+    }
+}
+
+impl Layout for SegmentedControl {}
+impl Control for SegmentedControl {}
+
+impl ObjcAccess for &SegmentedControl {
+    fn with_backing_obj_mut<F: Fn(id)>(&self, handler: F) {
+        self.objc.with_mut(handler);
+    }
+
+    fn get_from_backing_obj<F: Fn(&Object) -> R, R>(&self, handler: F) -> R {
+        self.objc.get(handler)
+    }
+}
+
+impl Layout for &SegmentedControl {}
+impl Control for &SegmentedControl {}
+
+impl Drop for SegmentedControl {
+    /// Nils out references on the Objective-C side and removes this from the backing view.
+    // Just to be sure, let's... nil these out. They should be weak references,
+    // but I'd rather be paranoid and remove them later.
+    fn drop(&mut self) {
+        self.objc.with_mut(|obj| unsafe {
+            let _: () = msg_send![obj, setTarget: nil];
+            let _: () = msg_send![obj, setAction: nil];
+        });
+    }
+}
+
+/// Registers an `NSButton` subclass, and configures it to hold some ivars
+/// for various things we need to store.
+fn register_class() -> *const Class {
+    static mut VIEW_CLASS: *const Class = 0 as *const Class;
+    static INIT: Once = Once::new();
+
+    INIT.call_once(|| unsafe {
+        let superclass = class!(NSSegmentedControl);
+        let decl = ClassDecl::new("RSTSegmentedControl", superclass).unwrap();
+        VIEW_CLASS = decl.register();
+    });
+
+    unsafe { VIEW_CLASS }
+}

src/appkit/toolbar/item.rs

@@ -10,6 +10,7 @@ use objc::runtime::Object;
 use objc::{class, msg_send, sel, sel_impl};
 use objc_id::{Id, ShareId};
 
+use crate::appkit::segmentedcontrol::SegmentedControl;
 use crate::button::{BezelStyle, Button};
 use crate::foundation::{id, NSString, NO, YES};
 use crate::image::Image;
@@ -21,6 +22,7 @@ pub struct ToolbarItem {
     pub identifier: String,
     pub objc: Id<Object>,
     pub button: Option<Button>,
+    pub segmented_control: Option<SegmentedControl>,
     pub image: Option<Image>,
     handler: Option<TargetActionHandler>
 }
@@ -42,6 +44,7 @@ impl ToolbarItem {
             identifier,
             objc,
             button: None,
+            segmented_control: None,
             image: None,
             handler: None
         }
@@ -52,6 +55,7 @@ impl ToolbarItem {
             identifier: "".to_string(),
             objc: unsafe { Id::from_retained_ptr(item) },
             button: None,
+            segmented_control: None,
             image: None,
             handler: None
         }
@@ -76,6 +80,15 @@ impl ToolbarItem {
         self.button = Some(button);
     }
 
+    /// Sets and takes ownership of the segmented control for this item.
+    pub fn set_segmented_control(&mut self, control: SegmentedControl) {
+        control.objc.with_mut(|obj| unsafe {
+            let _: () = msg_send![&*self.objc, setView: obj];
+        });
+
+        self.segmented_control = Some(control);
+    }
+
     /// Sets and takes ownership of the image for this toolbar item.
     pub fn set_image(&mut self, image: Image) {
         unsafe {
@@ -102,7 +115,7 @@ impl ToolbarItem {
     }
 
     /// Sets an action on this item.
-    pub fn set_action<F: Fn() + Send + Sync + 'static>(&mut self, action: F) {
+    pub fn set_action<F: Fn(*const Object) + Send + Sync + 'static>(&mut self, action: F) {
         let handler = TargetActionHandler::new(&*self.objc, action);
         self.handler = Some(handler);
     }

src/appkit/window/mod.rs

@@ -295,6 +295,14 @@ impl<T> Window<T> {
         }
     }
 
+    /// Used for setting a toolbar on this window.
+    pub fn toolbar(&self) -> ShareId<Object> {
+        unsafe {
+            let o: *mut Object = msg_send![&*self.objc, toolbar];
+            ShareId::from_ptr(o)
+        }
+    }
+
     /// Toggles whether the toolbar is shown for this window. Has no effect if no toolbar exists on
     /// this window.
     pub fn toggle_toolbar_shown(&self) {
@@ -303,6 +311,14 @@ impl<T> Window<T> {
         }
     }
 
+    /// Set the toolbar style
+    pub fn set_toolbar_style(&self, style: WindowToolbarStyle) {
+        let style: NSUInteger = style.into();
+        unsafe {
+            let _: () = msg_send![&*self.objc, setToolbarStyle: style];
+        }
+    }
+
     /// Set whether the toolbar toggle button is shown. Has no effect if no toolbar exists on this
     /// window.
     pub fn set_shows_toolbar_button(&self, shows: bool) {

src/button/mod.rs

@@ -12,7 +12,7 @@
 //! let mut button = Button::new("My button title");
 //! button.set_key_equivalent("c");
 //!
-//! button.set_action(|| {
+//! button.set_action(|_| {
 //!     println!("My button was clicked.");
 //! });
 //! let my_view : View<()> = todo!();
@@ -58,7 +58,7 @@ mod enums;
 /// let mut button = Button::new("My button title");
 /// button.set_key_equivalent("c");
 ///
-/// button.set_action(|| {
+/// button.set_action(|_| {
 ///     println!("My button was clicked.");
 /// });
 /// let my_view : View<()> = todo!();
@@ -212,7 +212,7 @@ impl Button {
 
     /// Attaches a callback for button press events. Don't get too creative now...
     /// best just to message pass or something.
-    pub fn set_action<F: Fn() + Send + Sync + 'static>(&mut self, action: F) {
+    pub fn set_action<F: Fn(*const Object) + Send + Sync + 'static>(&mut self, action: F) {
         // @TODO: This probably isn't ideal but gets the job done for now; needs revisiting.
         let this = self.objc.get(|obj| unsafe { ShareId::from_ptr(msg_send![obj, self]) });
         let handler = TargetActionHandler::new(&*this, action);

src/image/icons.rs

@@ -74,36 +74,62 @@ impl MacSystemIcon {
 #[derive(Debug)]
 pub enum SFSymbol {
     AtSymbol,
+    ArrowClockwise,
+    Bell,
+    BellFill,
+    BellBadge,
+    BellBadgeFill,
     GearShape,
     FolderFilled,
+    ListAndFilm,
     PaperPlane,
     PaperPlaneFilled,
     Plus,
     Minus,
+    Message,
+    MessageFill,
+    MessageBadge,
+    MessageBadgeFill,
+    MessageBadgeFilledFill,
+    PersonCropCircle,
     SliderVertical3,
     SquareAndArrowUpOnSquare,
     SquareAndArrowUpOnSquareFill,
     SquareAndArrowDownOnSquare,
     SquareAndArrowDownOnSquareFill,
-    SquareDashed
+    SquareDashed,
+    SquareAndPencil
 }
 
 impl SFSymbol {
     pub fn to_str(&self) -> &'static str {
         match self {
             Self::AtSymbol => "at",
+            Self::ArrowClockwise => "arrow.clockwise",
             Self::GearShape => "gearshape",
             Self::FolderFilled => "folder.fill",
+            Self::ListAndFilm => "list.and.film",
+            Self::Bell => "bell",
+            Self::BellFill => "bell.fill",
+            Self::BellBadge => "bell.badge",
+            Self::BellBadgeFill => "bell.badge.fill",
             Self::PaperPlane => "paperplane",
             Self::PaperPlaneFilled => "paperplane.fill",
             Self::Plus => "plus",
             Self::Minus => "minus",
+            Self::Message => "message",
+            Self::MessageFill => "message.fill",
+            Self::MessageBadge => "message.badge",
+            Self::MessageBadgeFill => "message.badge.fill",
+            Self::MessageBadgeFilledFill => "message.badge.filled.fill",
+            Self::PersonCropCircle => "person.crop.circle",
             Self::SliderVertical3 => "slider.vertical.3",
             Self::SquareAndArrowUpOnSquare => "square.and.arrow.up.on.square",
             Self::SquareAndArrowUpOnSquareFill => "square.and.arrow.up.on.square.fill",
             Self::SquareAndArrowDownOnSquare => "square.and.arrow.down.on.square",
             Self::SquareAndArrowDownOnSquareFill => "square.and.arrow.down.on.square.fill",
-            Self::SquareDashed => "square.dashed"
+            Self::SquareDashed => "square.dashed",
+            Self::SquareAndPencil => "square.and.pencil"
         }
     }
 }

src/image/image.rs

@@ -12,7 +12,7 @@ use core_graphics::{
 };
 
 use super::icons::*;
-use crate::foundation::{id, NSData, NSString, NO, YES};
+use crate::foundation::{id, NSData, NSString, NO, NSURL, YES};
 use crate::utils::os;
 
 /// Specifies resizing behavior for image drawing.
@@ -146,6 +146,14 @@ impl Image {
         })
     }
 
+    #[cfg(target_os = "macos")]
+    pub fn with_contents_of_url(url: NSURL) -> Self {
+        Image(unsafe {
+            let alloc: id = msg_send![Self::class(), alloc];
+            ShareId::from_ptr(msg_send![alloc, initWithContentsOfURL: url.objc])
+        })
+    }
+
     /// Given a Vec of data, will transform it into an Image by passing it through NSData.
     /// This can be useful for when you need to include_bytes!() something into your binary.
     pub fn with_data(data: &[u8]) -> Self {

src/invoker.rs

@@ -27,7 +27,7 @@ pub static ACTION_CALLBACK_PTR: &str = "rstTargetActionPtr";
 /// Point is, Button aren't created that much in the grand scheme of things,
 /// and the heap isn't our enemy in a GUI framework anyway. If someone knows
 /// a better way to do this that doesn't require double-boxing, I'm all ears.
-pub struct Action(Box<dyn Fn() + Send + Sync + 'static>);
+pub struct Action(Box<dyn Fn(*const Object) + Send + Sync + 'static>);
 
 impl fmt::Debug for Action {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
@@ -51,7 +51,7 @@ pub struct TargetActionHandler {
 
 impl TargetActionHandler {
     /// Returns a new TargetEventHandler.
-    pub fn new<F: Fn() + Send + Sync + 'static>(control: &Object, action: F) -> Self {
+    pub fn new<F: Fn(*const Object) + Send + Sync + 'static>(control: &Object, action: F) -> Self {
         let block = Box::new(Action(Box::new(action)));
         let ptr = Box::into_raw(block);
 
@@ -74,9 +74,9 @@ impl TargetActionHandler {
 }
 
 /// This will fire for an NSButton callback.
-extern "C" fn perform<F: Fn() + 'static>(this: &mut Object, _: Sel, _sender: id) {
+extern "C" fn perform<F: Fn(*const Object) + 'static>(this: &mut Object, _: Sel, sender: id) {
     let action = load::<Action>(this, ACTION_CALLBACK_PTR);
-    (action.0)();
+    (action.0)(sender.cast_const());
 }
 
 /// Due to the way that Rust and Objective-C live... very different lifestyles,
@@ -91,7 +91,7 @@ extern "C" fn perform<F: Fn() + 'static>(this: &mut Object, _: Sel, _sender: id)
 /// The `NSButton` owns this object on instantiation, and will release it
 /// on drop. We handle the heap copy on the Rust side, so setting the block
 /// is just an ivar.
-pub(crate) fn register_invoker_class<F: Fn() + 'static>() -> *const Class {
+pub(crate) fn register_invoker_class<F: Fn(*const Object) + 'static>() -> *const Class {
     load_or_register_class("NSObject", "RSTTargetActionHandler", |decl| unsafe {
         decl.add_ivar::<usize>(ACTION_CALLBACK_PTR);
         decl.add_method(sel!(perform:), perform::<F> as extern "C" fn(&mut Object, _, id));

src/select/mod.rs

@@ -140,7 +140,7 @@ impl Select {
     /// Really, this is not ideal.
     ///
     /// I cannot stress this enough.
-    pub fn set_action<F: Fn() + Send + Sync + 'static>(&mut self, action: F) {
+    pub fn set_action<F: Fn(*const Object) + Send + Sync + 'static>(&mut self, action: F) {
         // @TODO: This probably isn't ideal but gets the job done for now; needs revisiting.
         let this = self.objc.get(|obj| unsafe { ShareId::from_ptr(msg_send![obj, self]) });
         let handler = TargetActionHandler::new(&*this, action);

src/switch.rs

@@ -130,7 +130,7 @@ impl Switch {
 
     /// Attaches a callback for button press events. Don't get too creative now...
     /// best just to message pass or something.
-    pub fn set_action<F: Fn() + Send + Sync + 'static>(&mut self, action: F) {
+    pub fn set_action<F: Fn(*const Object) + Send + Sync + 'static>(&mut self, action: F) {
         // @TODO: This probably isn't ideal but gets the job done for now; needs revisiting.
         let this = self.objc.get(|obj| unsafe { ShareId::from_ptr(msg_send![obj, self]) });
         let handler = TargetActionHandler::new(&*this, action);