async initialization of the candy and displays

src/application.vala

@@ -1,8 +1,13 @@
+using Deskcandy.Candy;
 
 namespace Deskcandy {
   public class Application : Gtk.Application {
-    private Gtk.Window window;
+    public signal void initialized(BaseCandy candy);
 
+    private Gtk.Window window;
+    private Gtk.Window desktop_window;
+    
+    public BaseCandy candy { get; private set; }
     public bool enabled { get; set; }
 
     public Application() {
@@ -11,10 +16,14 @@ namespace Deskcandy {
       var toggle_enabled = new PropertyAction("toggle-enabled", this, "enabled");
       toggle_enabled.notify.connect(this.on_toggle_enabled);
       this.add_action(toggle_enabled);
-
       this.set_up_actions();
 
-      var xss = new Candy.XScreensaver();
+      this.candy = new XScreensaver();
+    }
+
+    private async void initialize_async() {
+      yield this.candy.initialize();
+      initialized(this.candy);
     }
 
     private void on_toggle_enabled() {
@@ -41,10 +50,10 @@ namespace Deskcandy {
         this.window = new Window(this);
       }
 
+      this.desktop_window = new DesktopWindow(this);
       this.window.present();
 
-      var desktop_win = new DesktopWindow(this);
-      desktop_win.present();
+      this.initialize_async.begin();
     }
   }
 }

src/candy/base.vala

@@ -0,0 +1,10 @@
+namespace Deskcandy.Candy {
+  public abstract class BaseCandy : Object {
+    protected BaseCandy() {
+    }
+
+    public abstract async void initialize();
+
+    public abstract Subprocess launch(uint socket_id) throws Error;
+  }
+}

src/candy/xscreensaver.vala

@@ -1,15 +1,24 @@
 namespace Deskcandy.Candy {
-  class XScreensaver : Object {
+  class XScreensaver : BaseCandy {
     public string config_dir { get; private set; }
     public string path_dir { get; private set; }
 
     public XScreensaver() {
-      this.hacky_determine_directories.begin();
+    }
+
+    public override async void initialize() {
+      yield this.hacky_determine_directories();
+    }
+
+    public override Subprocess launch(uint socket_id) throws Error {
+        message("Launching...");
+        return new Subprocess(SubprocessFlags.NONE, @"$(this.path_dir)/abstractile", "-window-id", socket_id.to_string());
     }
 
     private async void hacky_determine_directories() {
       warning("HACK: launching xscreensaver-settings to figure out the configuration");
       try {
+        SourceFunc callback = this.hacky_determine_directories.callback;
         var proc = new Subprocess(SubprocessFlags.STDERR_PIPE, "xscreensaver-settings", "--debug");
         GLib.Timeout.add(250, () => {
           proc.send_signal(15);
@@ -19,11 +28,12 @@ namespace Deskcandy.Candy {
             this.interpret_output(dis);
           } catch (Error e) {
             warning(e.message);
-            return false;
           }
 
+          callback();
           return false;
         });
+        yield;
 
       } catch (Error e) {
         error("failed to initialize xscreensaver settings.");

src/desktop_window.vala

@@ -1,27 +1,41 @@
+using Deskcandy.Candy;
+
 namespace Deskcandy {
+
   [GtkTemplate(ui = "/moe/solarpunk/Deskcandy/desktop_window.ui")]
   public class DesktopWindow : Gtk.Window {
-    public DesktopWindow(Gtk.Application app) {
+    private Gtk.Socket socket;
+    private Subprocess proc;
+
+    public DesktopWindow(Application app) {
       Object(application: app);
       Gdk.Rectangle rect = this.get_display().get_primary_monitor().get_geometry();
       this.set_default_size(rect.width, rect.height);
       this.set_keep_below(true);
 
-      this.refresh_socket();
+      app.initialized.connect(this.on_initialized);
     }
 
-    public void refresh_socket() {
-      Gtk.Socket socket = new Gtk.Socket();
-      socket.set_visible(true);
-      this.add(socket);
+    public void refresh_socket(BaseCandy candy) {
+      if (this.socket != null) {
+        this.remove(this.socket);
+        this.proc.send_signal(15);
+      }
 
-      var id = (uint)socket.get_id();
+      this.socket = new Gtk.Socket();
+      this.socket.set_visible(true);
+      this.add(this.socket);
 
       try {
-        Subprocess proc = new Subprocess(SubprocessFlags.NONE, "/usr/lib64/misc/xscreensaver/unknownpleasures", "-window-id", id.to_string());
-      } catch (GLib.Error e) {
+        this.proc = candy.launch((uint)this.socket.get_id());
+      } catch (Error e) {
         error(e.message);
       }
     }
+
+    private void on_initialized(BaseCandy candy) {
+      this.present();
+      this.refresh_socket(candy);
+    }
   }
 }

src/meson.build

@@ -3,6 +3,7 @@ deskcandy_sources = [
   'window.vala',
   'desktop_window.vala',
   'application.vala',
+  'candy/base.vala',
   'candy/xscreensaver.vala'
 ]
 

src/window.ui

@@ -231,7 +231,7 @@
     </mime-types>
   </object>
   <template class="DeskcandyWindow" parent="GtkApplicationWindow">
-    <property name="visible">True</property>
+    <property name="visible">False</property>
     <property name="can-focus">False</property>
     <property name="border-width">5</property>
     <property name="window-position">center</property>

src/window.vala

@@ -1,12 +1,11 @@
 using GLib;
+using Deskcandy.Candy;
 
 namespace Deskcandy {
   [GtkTemplate (ui = "/moe/solarpunk/Deskcandy/window.ui")]
   public class Window : Gtk.ApplicationWindow {
     private Gtk.Socket socket;
 
-    [GtkChild]
-    private unowned Gtk.Switch enabler_toggle;
     [GtkChild]
     private unowned Gtk.MenuButton open_menu_button;
     [GtkChild]
@@ -16,7 +15,9 @@ namespace Deskcandy {
     [GtkChild]
     private unowned Gtk.Stack main_stack;
 
-    public Window (Gtk.Application app) {
+    private Subprocess proc;
+
+    public Window (Application app) {
       Object (application: app);
 
       var preset_action_group = new SimpleActionGroup();
@@ -34,23 +35,28 @@ namespace Deskcandy {
       var menu = (GLib.MenuModel)builder.get_object("main_menu");
       this.open_menu_button.menu_model = menu;
 
+      app.initialized.connect(this.on_initialized);
       app.notify["enabled"].connect(this.on_notify_enabled);
-
-      this.refresh_socket();
     }
 
-    private void refresh_socket() {
+    public void on_initialized(BaseCandy candy) {
+      this.refresh_socket(candy);
+    }
+
+    private void refresh_socket(BaseCandy candy) {
       if (this.socket != null) {
         this.preview.remove(this.socket);
+        this.proc.send_signal(15);
       }
 
       this.socket = new Gtk.Socket();
+      this.socket.realize();
       this.socket.expand = true;
       this.socket.visible = true;
       this.preview.add(this.socket);
 
       try {
-        var subprocess = new Subprocess(SubprocessFlags.NONE, "/usr/lib64/misc/xscreensaver/abstractile", "-window-id", ((uint)this.socket.get_id()).to_string());
+        this.proc = candy.launch((uint)this.socket.get_id());
       } catch (Error e) {
         error(e.message);
       }