instance a few more things

default.go

@@ -2,7 +2,6 @@ package systray
 
 import (
 	"sync"
-	"sync/atomic"
 )
 
 var (
@@ -111,5 +110,5 @@ func AddMenuItemCheckbox(title string, tooltip string, checked bool) *MenuItem {
 func AddSeparator() {
 	initDefaultIcon()
 
-	defaultIcon.addSeparator(atomic.AddUint32(&currentID, 1), 0)
+	defaultIcon.addSeparator(0)
 }

menuitem.go

@@ -2,7 +2,6 @@ package systray
 
 import (
 	"fmt"
-	"sync/atomic"
 )
 
 // MenuItem is used to keep track each menu item of systray.
@@ -23,6 +22,8 @@ type MenuItem struct {
 	checked bool
 	// has the menu item a checkbox (Linux)
 	isCheckable bool
+	// icon is the icon that the item was created from
+	icon *Icon
 	// parent item, for sub menus
 	parent *MenuItem
 }
@@ -35,22 +36,23 @@ func (item *MenuItem) String() string {
 }
 
 // newMenuItem returns a populated MenuItem object
-func newMenuItem(title string, tooltip string, parent *MenuItem) *MenuItem {
+func (icon *Icon) newMenuItem(title string, tooltip string, parent *MenuItem) *MenuItem {
 	return &MenuItem{
 		ClickedCh:   make(chan struct{}),
-		id:          atomic.AddUint32(&currentID, 1),
+		id:          icon.nextID(),
 		title:       title,
 		tooltip:     tooltip,
 		disabled:    false,
 		checked:     false,
 		isCheckable: false,
+		icon:        icon,
 		parent:      parent,
 	}
 }
 
 // AddSeparator adds a separator bar to the submenu
 func (item *MenuItem) AddSeparator() {
-	addSeparator(atomic.AddUint32(&currentID, 1), item.id)
+	item.icon.addSeparator(item.id)
 }
 
 // AddSubMenuItem adds a nested sub-menu item with the designated title and tooltip.

systray.go

@@ -4,6 +4,7 @@ package systray
 import (
 	"log"
 	"sync"
+	"sync/atomic"
 )
 
 type Icon struct {
@@ -24,6 +25,10 @@ func NewIcon() (*Icon, error) {
 	}, nil
 }
 
+func (icon *Icon) nextID() uint32 {
+	return atomic.AddUint32(&icon.id, 1)
+}
+
 // This helper function allows us to call systrayExit only once,
 // without accidentally calling it twice in the same lifetime.
 func runSystrayExit() {