add ctop header, disabled by default

config.go

@@ -4,6 +4,7 @@ import (
 	"os"
 )
 
+var GlobalConfig = NewDefaultConfig()
 var configChan = make(chan ConfigMsg)
 
 type Config map[string]string
@@ -23,8 +24,9 @@ func NewDefaultConfig() Config {
 		docker = "unix:///var/run/docker.sock"
 	}
 	config := Config{
-		"dockerHost": docker,
-		"sortField":  "id",
+		"dockerHost":   docker,
+		"sortField":    "id",
+		"enableHeader": "0",
 	}
 	go func() {
 		for m := range configChan {

containermap.go

@@ -9,16 +9,13 @@ var filters = map[string][]string{
 }
 
 func NewContainerMap() *ContainerMap {
-	config := NewDefaultConfig()
-
 	// init docker client
-	client, err := docker.NewClient(config["dockerHost"])
+	client, err := docker.NewClient(GlobalConfig["dockerHost"])
 	if err != nil {
 		panic(err)
 	}
 
 	cm := &ContainerMap{
-		config:     config,
 		client:     client,
 		containers: make(map[string]*Container),
 	}
@@ -27,7 +24,6 @@ func NewContainerMap() *ContainerMap {
 }
 
 type ContainerMap struct {
-	config     Config
 	client     *docker.Client
 	containers map[string]*Container
 }
@@ -66,6 +62,6 @@ func (cm *ContainerMap) All() []*Container {
 	for _, c := range cm.containers {
 		containers = append(containers, c)
 	}
-	SortContainers(cm.config["sortField"], containers)
+	SortContainers(GlobalConfig["sortField"], containers)
 	return containers
 }

grid.go

@@ -3,6 +3,7 @@ package main
 import (
 	"fmt"
 
+	"github.com/bcicen/ctop/widgets"
 	ui "github.com/gizak/termui"
 )
 
@@ -10,6 +11,7 @@ type Grid struct {
 	cursorID     string // id of currently selected container
 	containers   []*Container
 	containerMap *ContainerMap
+	header       *widgets.CTopHeader
 }
 
 func NewGrid() *Grid {
@@ -19,6 +21,7 @@ func NewGrid() *Grid {
 		cursorID:     containers[0].id,
 		containers:   containers,
 		containerMap: containerMap,
+		header:       widgets.NewCTopHeader(),
 	}
 }
 
@@ -67,7 +70,11 @@ func (g *Grid) redrawRows() {
 	ui.Body.Rows = []*ui.Row{}
 
 	// build layout
-	ui.Body.AddRows(header())
+	if GlobalConfig["enableHeader"] == "1" {
+		g.header.SetCount(len(g.containers))
+		ui.Body.AddRows(g.header.Row())
+	}
+	ui.Body.AddRows(fieldHeader())
 	for _, c := range g.containers {
 		ui.Body.AddRows(c.widgets.Row())
 	}
@@ -76,7 +83,7 @@ func (g *Grid) redrawRows() {
 	ui.Render(ui.Body)
 }
 
-func header() *ui.Row {
+func fieldHeader() *ui.Row {
 	return ui.NewRow(
 		ui.NewCol(2, 0, headerPar("NAME")),
 		ui.NewCol(2, 0, headerPar("CID")),

widgets/header.go

@@ -0,0 +1,47 @@
+package widgets
+
+import (
+	"fmt"
+	"time"
+
+	ui "github.com/gizak/termui"
+)
+
+type CTopHeader struct {
+	Time  *ui.Par
+	Count *ui.Par
+}
+
+func NewCTopHeader() *CTopHeader {
+	return &CTopHeader{
+		Time:  headerPar(timeStr()),
+		Count: headerPar("-"),
+	}
+}
+
+func (c *CTopHeader) Row() *ui.Row {
+	c.Time.Text = timeStr()
+	return ui.NewRow(
+		ui.NewCol(2, 0, c.Time),
+		ui.NewCol(2, 0, c.Count),
+	)
+}
+
+func (c *CTopHeader) SetCount(val int) {
+	c.Count.Text = fmt.Sprintf("%d containers", val)
+}
+
+func timeStr() string {
+	return time.Now().Local().Format("15:04:05 MST")
+}
+
+func headerPar(s string) *ui.Par {
+	p := ui.NewPar(fmt.Sprintf(" %s", s))
+	p.Border = false
+	p.Height = 1
+	p.Width = 20
+	p.TextFgColor = ui.ColorDefault
+	p.TextBgColor = ui.ColorWhite
+	p.Bg = ui.ColorWhite
+	return p
+}