nicer button interactivities

include/widgets/bluetooth.hpp

@@ -13,9 +13,9 @@ class BluetoothWidget : public Popover {
     void setPowerState(bool state);
     void setIsDiscovering(bool state);
 
-    sigc::signal<void(bool)> powerStateChangedSignal;
-    sigc::signal<void(bool)> isDiscoveringChangedSignal;
-    
+    sigc::signal<void()> onPowerStateButtonClickedSignal;
+    sigc::signal<void()> onIsDiscoveringButtonClickedSignal;
+
     void update();
   private:
     bool isPowered = false;
@@ -27,5 +27,11 @@ class BluetoothWidget : public Popover {
     Gtk::Box *deviceList = nullptr;
 
     Gtk::Button *scanButton   = nullptr;
-    Gtk::Button *toggleButton = nullptr;
+    Gtk::Button *powerButton = nullptr;
+
+
+    void onPowerButtonClicked();
+    void onScanButtonClicked();
+
+    void toggleButton(Gtk::Button *button, bool state);
 };