add SortItems param to Menu, AddItems method

menus.go

@@ -17,10 +17,11 @@ func HelpMenu() {
 	ResetView()
 	defer ResetView()
 
-	m := widgets.NewMenu(helpDialog)
+	m := widgets.NewMenu()
 	m.TextFgColor = ui.ColorWhite
 	m.BorderLabel = "Help"
 	m.BorderFg = ui.ColorCyan
+	m.AddItems(widgets.NewMenuItems(helpDialog)...)
 	ui.Render(m)
 	ui.Handle("/sys/kbd/", func(ui.Event) {
 		ui.StopLoop()
@@ -50,12 +51,15 @@ func SortMenu() {
 	ResetView()
 	defer ResetView()
 
-	m := widgets.NewMenu(SortFields())
+	m := widgets.NewMenu()
 	m.Selectable = true
+	m.SortItems = true
 	m.TextFgColor = ui.ColorWhite
 	m.BorderLabel = "Sort Field"
 	m.BorderFg = ui.ColorCyan
 
+	m.AddItems(widgets.NewMenuItems(SortFields())...)
+
 	// set cursor position to current sort field
 	current := config.Get("sortField")
 	for n, item := range m.Items {

sort.go

@@ -1,8 +1,6 @@
 package main
 
 import (
-	"sort"
-
 	"github.com/bcicen/ctop/config"
 )
 
@@ -17,13 +15,11 @@ var Sorters = map[string]sortMethod{
 	"net":   func(c1, c2 *Container) bool { return sumNet(c1) < sumNet(c2) },
 }
 
-func SortFields() []string {
-	a := sort.StringSlice{}
+func SortFields() (fields []string) {
 	for k := range Sorters {
-		a = append(a, k)
+		fields = append(fields, k)
 	}
-	sort.Sort(a)
-	return a
+	return fields
 }
 
 type Containers []*Container

widgets/menu.go

@@ -23,6 +23,14 @@ func (m MenuItem) Text() string {
 
 type MenuItems []MenuItem
 
+// Create new MenuItems from string array
+func NewMenuItems(a []string) (items MenuItems) {
+	for _, s := range a {
+		items = append(items, MenuItem{Val: s})
+	}
+	return items
+}
+
 // Sort methods for MenuItems
 func (m MenuItems) Len() int      { return len(m) }
 func (m MenuItems) Swap(a, b int) { m[a], m[b] = m[b], m[a] }
@@ -33,6 +41,7 @@ func (m MenuItems) Less(a, b int) bool {
 type Menu struct {
 	ui.Block
 	Items       MenuItems
+	SortItems   bool // enable automatic sorting of menu items
 	TextFgColor ui.Attribute
 	TextBgColor ui.Attribute
 	Selectable  bool
@@ -40,28 +49,28 @@ type Menu struct {
 	padding     Padding
 }
 
-func NewMenu(items []string) *Menu {
-	m := &Menu{
+func NewMenu() *Menu {
+	return &Menu{
 		Block:       *ui.NewBlock(),
 		TextFgColor: ui.ThemeAttr("par.text.fg"),
 		TextBgColor: ui.ThemeAttr("par.text.bg"),
-		Selectable:  false,
 		CursorPos:   0,
 		padding:     Padding{4, 2},
 	}
-
-	for _, s := range items {
-		m.Items = append(m.Items, MenuItem{Val: s})
-	}
-	sort.Sort(m.Items)
-
-	m.calcSize()
-	return m
 }
 
-func (m *Menu) SetItems(items []MenuItem) {
-	m.Items = items
-	sort.Sort(m.Items)
+func (m *Menu) AddItems(items ...MenuItem) {
+	for _, i := range items {
+		m.Items = append(m.Items, i)
+	}
+	m.refresh()
+}
+
+// Sort menu items(if enabled) and re-calculate window size
+func (m *Menu) refresh() {
+	if m.SortItems {
+		sort.Sort(m.Items)
+	}
 	m.calcSize()
 }