Extract VGAGainField.

firmware/application/analog_audio_app.hpp

@@ -117,12 +117,8 @@ private:
 		{ 15 * 8, 0 * 16 }
 	};
 
-	NumberField field_vga {
+	VGAGainField field_vga {
-		{ 18 * 8, 0 * 16},
+		{ 18 * 8, 0 * 16 }
-		2,
-		{ max2837::vga::gain_db_range.minimum, max2837::vga::gain_db_range.maximum },
-		max2837::vga::gain_db_step,
-		' ',
 	};
 
 	OptionsField options_modulation {

firmware/application/ui_receiver.cpp

@@ -318,4 +318,24 @@ void LNAGainField::on_focus() {
 	}
 }
 
+/* VGAGainField **********************************************************/
+
+VGAGainField::VGAGainField(
+	Point parent_pos
+) : NumberField {
+		parent_pos, 2,
+		{ max2837::vga::gain_db_range.minimum, max2837::vga::gain_db_range.maximum },
+		max2837::vga::gain_db_step,
+		' ',
+	}
+{
+}
+
+void VGAGainField::on_focus() {
+	//Widget::on_focus();
+	if( on_show_options ) {
+		on_show_options();
+	}
+}
+
 } /* namespace ui */

firmware/application/ui_receiver.hpp

@@ -315,6 +315,15 @@ public:
 	void on_focus() override;
 };
 
+class VGAGainField : public NumberField {
+public:
+	std::function<void(void)> on_show_options;
+
+	VGAGainField(Point parent_pos);
+
+	void on_focus() override;
+};
+
 } /* namespace ui */
 
 #endif/*__UI_RECEIVER_H__*/