Add settings and pass values to desklet

files/system-monitor-graph@rcassani/desklet.js

@@ -1,30 +1,40 @@
 const Desklet = imports.ui.desklet;
+const Settings = imports.ui.settings;
+
 const St = imports.gi.St;
 
 function MyDesklet(metadata, desklet_id) {
   this._init(metadata, desklet_id);
 }
 
+function main(metadata, desklet_id) {
+  return new MyDesklet(metadata, desklet_id);
+}
+
 MyDesklet.prototype = {
   __proto__: Desklet.Desklet.prototype,
 
   _init: function(metadata, desklet_id) {
     Desklet.Desklet.prototype._init.call(this, metadata, desklet_id);
+
+    // initialize settings
+    this.settings = new Settings.DeskletSettings(this, this.metadata["uuid"], desklet_id);
+    this.settings.bindProperty(Settings.BindingDirection.IN, "type", "type", this.on_setting_changed);
+
+    // initialize desklet GUI
     this.setupUI();
   },
 
-    setupUI(){
+  setupUI: function(){
+    var type = this.type;
+
     // creates container for one child
     this.window = new St.Bin();
     // creates a label with text
-      this.text = new St.Label({text: "Hello Desktop"});
+    this.text = new St.Label({text: "Hello Desktop ".concat(type)});
     // adds label to container
     this.window.add_actor(this.text);
     // Sets the container as content actor of the desklet
     this.setContent(this.window);
   },
 };
-
-function main(metadata, desklet_id) {
-    return new MyDesklet(metadata, desklet_id);
-}

files/system-monitor-graph@rcassani/settings-schema.json

@@ -0,0 +1,31 @@
+{
+  "head0": {
+    "type": "header",
+    "description": "Settings for system-monitor-graph@rcassani"
+  },
+
+  "head1": {
+    "type": "header",
+    "description": "General"
+  },
+  "type": {
+    "type": "combobox",
+    "default": "cpu",
+    "description": "System variable for graph",
+    "tooltip": "Select the system variable to monitor.",
+    "options" : {
+      "CPU" : "cpu",
+      "RAM": "ram"
+    }
+  },
+
+  "head2": {
+    "type": "header",
+    "description": "Visual"
+  },
+  "line-color": {
+    "type": "colorchooser",
+    "default": "rgba(50,168,82,1.0)",
+    "description": "Line color"
+  }
+}