Appearance jammy (#78)

* chore(appearance): add interface i18n phrases

* wip: appearance page skeleton

* wip: more work on the skeletop

* wip: appearance

* wip: add icons and more widgets to appearance page

* wip: set the theme on entering and leaving the appearance panel

* cleanup & layout improvements

* wip(appearance): accent buttons

* fixes

fix default schemas, install methods, and appearance page

* use git deps

* clippy and cleanup

* update libcosmic & fix illustration names

* feat: cosmic-comp theme variables

* use git deps

* fix: add dep to control

* fix: install libwayland-dev

* udpate libcosmic

* wip: reset to default button

* refactor: color button improvements

* feat: import / export themes

* refactor: defaults for most color pickers and toggle for window hint

* refactor: use a context drawer for the container background color

* cleanup(appearance): box ThemeBuilder in Message

* cleanup(appearance): clippy

* fix(appearance): window hint toggle handling

* chore: more entries for the default schema

* fix: typo

page/src/binder.rs

@@ -4,6 +4,7 @@
 use crate::section::{self, Section};
 use crate::{Content, Info, Page};
 use cosmic::iced_runtime::command::{Action, Command};
+use cosmic::Element;
 use regex::Regex;
 use slotmap::{SecondaryMap, SlotMap, SparseSecondaryMap};
 use std::{
@@ -135,6 +136,13 @@ impl<Message: 'static> Binder<Message> {
         page.downcast_ref::<P>()
     }
 
+    /// Obtain a reference to a page by its type ID.
+    #[must_use]
+    pub fn context_drawer(&self, id: crate::Entity) -> Option<Element<'_, Message>> {
+        let page = self.page.get(id)?;
+        page.context_drawer()
+    }
+
     /// Obtain a reference to a page by its type ID.
     #[must_use]
     pub fn page_mut<P: Page<Message>>(&mut self) -> Option<&mut P> {
@@ -142,6 +150,14 @@ impl<Message: 'static> Binder<Message> {
         page.downcast_mut::<P>()
     }
 
+    /// Returns a command when a page is left
+    pub fn on_leave(&mut self, id: crate::Entity) -> Option<Command<Message>> {
+        if let Some(page) = self.page.get_mut(id) {
+            return Some(page.on_leave());
+        }
+        None
+    }
+
     /// Calls a page's load function to refresh its data.
     pub fn page_reload(&mut self, id: crate::Entity) -> Option<Command<Message>> {
         if let Some(page) = self.page.get(id) {

page/src/lib.rs

@@ -5,6 +5,7 @@ mod binder;
 pub use binder::{AutoBind, Binder};
 
 mod insert;
+use cosmic::{Command, Element};
 use downcast_rs::{impl_downcast, Downcast};
 pub use insert::Insert;
 
@@ -38,11 +39,21 @@ pub trait Page<Message: 'static>: Downcast {
         None
     }
 
+    #[must_use]
+    fn context_drawer(&self) -> Option<Element<'_, Message>> {
+        None
+    }
+
     #[must_use]
     #[allow(unused)]
     fn load(&self, page: crate::Entity) -> Option<crate::Task<Message>> {
         None
     }
+
+    /// Emit a command when the page is left
+    fn on_leave(&mut self) -> Command<Message> {
+        Command::none()
+    }
 }
 
 impl_downcast!(Page<Message>);