Add a keyboard shortcut to reverse colors

Cargo.lock

@@ -107,7 +107,7 @@ dependencies = [
 
 [[package]]
 name = "contrast"
-version = "0.0.1"
+version = "0.0.2"
 dependencies = [
  "dbus 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "gdk 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",

data/resources/ui/shortcuts.ui

@@ -11,6 +11,13 @@
                     <object class="GtkShortcutsGroup">
                         <property name="visible">True</property>
                         <property name="title" translatable="yes" context="shortcut window">General</property>
+                        <child>
+                            <object class="GtkShortcutsShortcut">
+                                <property name="visible">True</property>
+                                <property name="title" translatable="yes" context="shortcut window">Reverse Colors</property>
+                                <property name="accelerator">&lt;Primary&gt;R</property>
+                            </object>
+                        </child>
                         <child>
                             <object class="GtkShortcutsShortcut">
                                 <property name="visible">True</property>

src/application.rs

@@ -75,6 +75,8 @@ impl Application {
         simple_action.connect_activate(move |_, _| app.quit());
         self.app.add_action(&simple_action);
         self.app.set_accels_for_action("app.quit", &["<primary>q"]);
+        self.app.set_accels_for_action("win.show-help-overlay", &["<primary>question"]);
+        self.app.set_accels_for_action("window.reverse-colors", &["<primary>r"]);
 
         // About
         let window = self.window.widget.clone();

src/window.rs

@@ -6,9 +6,10 @@ use super::contrast_preview::ContrastPreview;
 use super::window_state::WindowState;
 
 use gettextrs::gettext;
+use gio::prelude::*;
 use glib::ObjectExt;
 use gtk::prelude::*;
-use libhandy::prelude::*;
+use libhandy::HeaderBarExt;
 use std::{cell::RefCell, rc::Rc};
 
 pub struct Window {
@@ -103,7 +104,10 @@ impl Window {
         let fg_entry = self.fg_entry.clone();
         let bg_entry = self.bg_entry.clone();
         let sender = self.sender.clone();
-        self.reverse_btn.connect_clicked(move |_| {
+
+        let actions = gio::SimpleActionGroup::new();
+        let reverse_colors = gio::SimpleAction::new("reverse-colors", None);
+        reverse_colors.connect_activate(move |_, _| {
             fg_entry.entry.block_signal(&fg_handle);
             bg_entry.entry.block_signal(&bg_handle);
             let fg_colour = fg_entry.get_text();
@@ -118,6 +122,9 @@ impl Window {
 
             sender.send(Message::ColorChanged).ok(); // never fails
         });
+        actions.add_action(&reverse_colors);
+
+        self.widget.insert_action_group("window", Some(&actions));
     }
 
     fn setup_widgets(&self) {
@@ -130,6 +137,7 @@ impl Window {
         self.bg_entry.entry.get_style_context().add_class("bg-entry");
 
         self.reverse_btn.set_halign(gtk::Align::Center);
+        self.reverse_btn.set_action_name(Some("window.reverse-colors"));
         let reverse_img = gtk::Image::new_from_icon_name(Some("network-transmit-receive-symbolic"), gtk::IconSize::Button);
         reverse_img.show();
         self.reverse_btn.set_image(Some(&reverse_img));