Convert dialogs to navigator screens

musicus/src/editors/instrument.rs

@@ -0,0 +1,135 @@
+use crate::backend::Backend;
+use crate::database::*;
+use crate::widgets::{Navigator, NavigatorScreen};
+use anyhow::Result;
+use glib::clone;
+use gtk::prelude::*;
+use gtk_macros::get_widget;
+use std::cell::RefCell;
+use std::rc::Rc;
+
+/// A dialog for creating or editing a instrument.
+pub struct InstrumentEditor {
+    backend: Rc<Backend>,
+    id: String,
+    widget: gtk::Stack,
+    info_bar: gtk::InfoBar,
+    name_entry: gtk::Entry,
+    upload_switch: gtk::Switch,
+    saved_cb: RefCell<Option<Box<dyn Fn(Instrument) -> ()>>>,
+    navigator: RefCell<Option<Rc<Navigator>>>,
+}
+
+impl InstrumentEditor {
+    /// Create a new instrument editor and optionally initialize it.
+    pub fn new(backend: Rc<Backend>, instrument: Option<Instrument>) -> Rc<Self> {
+        // Create UI
+
+        let builder = gtk::Builder::from_resource("/de/johrpan/musicus/ui/instrument_editor.ui");
+
+        get_widget!(builder, gtk::Stack, widget);
+        get_widget!(builder, gtk::Button, back_button);
+        get_widget!(builder, gtk::Button, save_button);
+        get_widget!(builder, gtk::InfoBar, info_bar);
+        get_widget!(builder, gtk::Entry, name_entry);
+        get_widget!(builder, gtk::Switch, upload_switch);
+
+        let id = match instrument {
+            Some(instrument) => {
+                name_entry.set_text(&instrument.name);
+
+                instrument.id
+            }
+            None => generate_id(),
+        };
+
+        let this = Rc::new(Self {
+            backend,
+            id,
+            widget,
+            info_bar,
+            name_entry,
+            upload_switch,
+            saved_cb: RefCell::new(None),
+            navigator: RefCell::new(None),
+        });
+
+        // Connect signals and callbacks
+
+        back_button.connect_clicked(clone!(@strong this => move |_| {
+            let navigator = this.navigator.borrow().clone();
+            if let Some(navigator) = navigator {
+                navigator.pop();
+            }
+        }));
+
+        save_button.connect_clicked(clone!(@strong this => move |_| {
+            let context = glib::MainContext::default();
+            let clone = this.clone();
+            context.spawn_local(async move {
+                clone.widget.set_visible_child_name("loading");
+                match clone.clone().save().await {
+                    Ok(_) => {
+                        let navigator = clone.navigator.borrow().clone();
+                        if let Some(navigator) = navigator {
+                            navigator.pop();
+                        }
+                    }
+                    Err(_) => {
+                        clone.info_bar.set_revealed(true);
+                        clone.widget.set_visible_child_name("content");
+                    }
+                }
+
+            });
+        }));
+
+        this
+    }
+
+    /// Set the closure to be called if the instrument was saved.
+    pub fn set_saved_cb<F: Fn(Instrument) -> () + 'static>(&self, cb: F) {
+        self.saved_cb.replace(Some(Box::new(cb)));
+    }
+
+    /// Save the instrument and possibly upload it to the server.
+    async fn save(self: Rc<Self>) -> Result<()> {
+        let name = self.name_entry.get_text().to_string();
+
+        let instrument = Instrument {
+            id: self.id.clone(),
+            name,
+        };
+
+        let upload = self.upload_switch.get_active();
+        if upload {
+            self.backend.post_instrument(&instrument).await?;
+        }
+
+        self.backend
+            .db()
+            .update_instrument(instrument.clone())
+            .await?;
+        self.backend.library_changed();
+
+        if let Some(cb) = &*self.saved_cb.borrow() {
+            cb(instrument.clone());
+        }
+
+        Ok(())
+    }
+}
+
+impl NavigatorScreen for InstrumentEditor {
+    fn attach_navigator(&self, navigator: Rc<Navigator>) {
+        self.navigator.replace(Some(navigator));
+    }
+
+    fn get_widget(&self) -> gtk::Widget {
+        self.widget.clone().upcast()
+    }
+
+    fn detach_navigator(&self) {
+        self.navigator.replace(None);
+    }
+}