minor refactoring

config.yml

@@ -1,22 +1,26 @@
 theme: dark
 run-charts:
-  - title: curl-latency
+  - title: CURL-LATENCY
     data:
-      - label: google.com
+      - label: GOOGLE
         script: curl -o /dev/null -s -w '%{time_total}'  http://google.com
-      - label: yahoo.com
+      - label: YAHOO
         script: curl -o /dev/null -s -w '%{time_total}'  http://yahoo.com
-      - label: example.com
+      - label: YANDEX
-        script: curl -o /dev/null -s -w '%{time_total}'  http://example.com
+        script: curl -o /dev/null -s -w '%{time_total}'  http://yandex.com
     refresh-rate-ms: 300
     time-scale-sec: 1
+    decimal-places: 1
+    legend:
+      labels: true
+      details: true
     position:
       x: 0
       y: 0
     size:
       x: 15
       y: 15
-  - title: mongo-count
+  - title: MONGO-COUNT
     data:
       - label: posts
         script: mongo --quiet --host=localhost blog --eval "db.getCollection('post').find({}).size()" | grep 2

config/config.go

@@ -2,8 +2,8 @@ package config
 
 import (
 	"github.com/sqshq/vcmd/data"
-	. "github.com/sqshq/vcmd/layout"
 	"github.com/sqshq/vcmd/settings"
+	. "github.com/sqshq/vcmd/widgets"
 	"gopkg.in/yaml.v2"
 	"io/ioutil"
 	"log"
@@ -11,10 +11,10 @@ import (
 
 type Config struct {
 	Theme     settings.Theme   `yaml:"theme"`
-	RunCharts []RunChart     `yaml:"run-charts"`
+	RunCharts []RunChartConfig `yaml:"run-charts"`
 }
 
-type RunChart struct {
+type RunChartConfig struct {
 	Title         string      `yaml:"title"`
 	Items         []data.Item `yaml:"data"`
 	Position      Position    `yaml:"position"`

data/poller.go

@@ -7,13 +7,12 @@ import (
 type Poller struct {
 	consumer Consumer
 	item     Item
-	pause    bool
 }
 
 func NewPoller(consumer Consumer, item Item, rateMs int) Poller {
 
 	ticker := time.NewTicker(time.Duration(rateMs * int(time.Millisecond)))
-	poller := Poller{consumer, item, false}
+	poller := Poller{consumer, item}
 
 	go func() {
 		for {
@@ -27,16 +26,8 @@ func NewPoller(consumer Consumer, item Item, rateMs int) Poller {
 	return poller
 }
 
-func (self *Poller) TogglePause() {
-	self.pause = !self.pause
-}
-
 func (self *Poller) poll() {
 
-	if self.pause {
-		return
-	}
-
 	value, err := self.item.nextValue()
 
 	if err != nil {

main.go

@@ -4,7 +4,7 @@ import (
 	ui "github.com/sqshq/termui"
 	"github.com/sqshq/vcmd/config"
 	"github.com/sqshq/vcmd/data"
-	"github.com/sqshq/vcmd/layout"
+	"github.com/sqshq/vcmd/settings"
 	"github.com/sqshq/vcmd/widgets"
 	"log"
 	"time"
@@ -12,6 +12,8 @@ import (
 
 func main() {
 
+	print("\033]0;vcmd\007")
+
 	cfg := config.Load("/Users/sqshq/Go/src/github.com/sqshq/vcmd/config.yml")
 
 	if err := ui.Init(); err != nil {
@@ -22,7 +24,7 @@ func main() {
 	events := ui.PollEvents()
 
 	pollers := make([]data.Poller, 0)
-	lout := layout.NewLayout(ui.TerminalDimensions())
+	lout := widgets.NewLayout(ui.TerminalDimensions())
 
 	for _, chartConfig := range cfg.RunCharts {
 
@@ -36,17 +38,18 @@ func main() {
 	}
 
 	ticker := time.NewTicker(30 * time.Millisecond)
+	pause := false
 
 	for {
 		select {
 		case e := <-events:
 			switch e.ID {
-			case "q", "<C-c>":
+			case settings.EventQuit, settings.EventExit:
 				return
-			case "<Resize>":
+			case settings.EventResize:
 				payload := e.Payload.(ui.Resize)
 				lout.ChangeDimensions(payload.Width, payload.Height)
-			case "<MouseLeft>":
+			case settings.EventMouseClick:
 				//payload := e.Payload.(ui.Mouse)
 				//x, y := payload.X, payload.Y
 				//log.Printf("x: %v, y: %v", x, y)
@@ -54,23 +57,23 @@ func main() {
 			switch e.Type {
 			case ui.KeyboardEvent:
 				switch e.ID {
-				case "<Left>":
+				case settings.EventKeyboardLeft:
 					// here we are going to move selection (special type of layout item)
 					//lout.GetItem("").Move(-1, 0)
-				case "<Right>":
+				case settings.EventKeyboardRight:
 					//lout.GetItem(0).Move(1, 0)
-				case "<Down>":
+				case settings.EventKeyboardDown:
 					//lout.GetItem(0).Move(0, 1)
-				case "<Up>":
+				case settings.EventKeyboardUp:
 					//lout.GetItem(0).Move(0, -1)
-				case "p":
+				case settings.EventPause:
-					for _, poller := range pollers {
+					pause = !pause
-						poller.TogglePause()
-					}
 				}
 			}
 		case <-ticker.C:
+			if !pause {
 				ui.Render(lout)
 			}
 		}
+	}
 }

settings/event.go

@@ -0,0 +1,15 @@
+package settings
+
+type Event string
+
+const (
+	EventPause         = "p"
+	EventQuit          = "q"
+	EventResize        = "<Resize>"
+	EventExit          = "<C-c>"
+	EventMouseClick    = "<MouseLeft>"
+	EventKeyboardLeft  = "<Left>"
+	EventKeyboardRight = "<Right>"
+	EventKeyboardUp    = "<Up>"
+	EventKeyboardDown  = "<Down>"
+)

widgets/component.go

@@ -1,4 +1,4 @@
-package layout
+package widgets
 
 import (
 	. "github.com/sqshq/termui"

widgets/layout.go

@@ -1,4 +1,4 @@
-package layout
+package widgets
 
 import (
 	. "github.com/sqshq/termui"

widgets/runchart.go

@@ -20,6 +20,7 @@ const (
 	xAxisLabelsGap    = 2
 	yAxisLabelsWidth  = 5
 	yAxisLabelsGap    = 1
+	xAxisLegendWidth  = 15
 )
 
 type RunChart struct {
@@ -79,7 +80,7 @@ func (self *RunChart) newChartGrid() ChartGrid {
 		paddingWidth:    xAxisLabelsGap + xAxisLabelsWidth,
 		maxTimeWidth:    self.Inner.Max.X - xAxisLabelsWidth/2 - xAxisLabelsGap,
 		timeExtremum:    GetTimeExtremum(linesCount, paddingDuration),
-		valueExtremum:   GetValueExtremum(self.lines),
+		valueExtremum:   GetChartValueExtremum(self.lines),
 	}
 }
 
@@ -88,7 +89,7 @@ func (self *RunChart) Draw(buf *Buffer) {
 	self.mutex.Lock()
 	self.Block.Draw(buf)
 	self.grid = self.newChartGrid()
-	self.plotAxes(buf)
+	self.renderAxes(buf)
 
 	drawArea := image.Rect(
 		self.Inner.Min.X+yAxisLabelsWidth+1, self.Inner.Min.Y,
@@ -96,6 +97,7 @@ func (self *RunChart) Draw(buf *Buffer) {
 	)
 
 	self.renderItems(buf, drawArea)
+	self.renderLegend(buf, drawArea)
 	self.mutex.Unlock()
 }
 
@@ -151,7 +153,61 @@ func (self *RunChart) trimOutOfRangeValues() {
 	}
 }
 
-func (self *RunChart) renderItems(buf *Buffer, drawArea image.Rectangle) {
+func (self *RunChart) renderAxes(buffer *Buffer) {
+	// draw origin cell
+	buffer.SetCell(
+		NewCell(BOTTOM_LEFT, NewStyle(ColorWhite)),
+		image.Pt(self.Inner.Min.X+yAxisLabelsWidth, self.Inner.Max.Y-xAxisLabelsHeight-1),
+	)
+
+	// draw x axis line
+	for i := yAxisLabelsWidth + 1; i < self.Inner.Dx(); i++ {
+		buffer.SetCell(
+			NewCell(HORIZONTAL_DASH, NewStyle(ColorWhite)),
+			image.Pt(i+self.Inner.Min.X, self.Inner.Max.Y-xAxisLabelsHeight-1),
+		)
+	}
+
+	// draw grid
+	for y := 0; y < self.Inner.Dy()-xAxisLabelsHeight-1; y = y + 2 {
+		for x := 0; x < self.grid.linesCount; x++ {
+			buffer.SetCell(
+				NewCell(VERTICAL_DASH, NewStyle(settings.ColorDarkGrey)),
+				image.Pt(self.grid.maxTimeWidth-x*self.grid.paddingWidth, y+self.Inner.Min.Y+1),
+			)
+		}
+	}
+
+	// draw y axis line
+	for i := 0; i < self.Inner.Dy()-xAxisLabelsHeight-1; i++ {
+		buffer.SetCell(
+			NewCell(VERTICAL_DASH, NewStyle(ColorWhite)),
+			image.Pt(self.Inner.Min.X+yAxisLabelsWidth, i+self.Inner.Min.Y),
+		)
+	}
+
+	// draw x axis time labels
+	for i := 0; i < self.grid.linesCount; i++ {
+		labelTime := self.grid.timeExtremum.max.Add(time.Duration(-i) * time.Second)
+		buffer.SetString(
+			labelTime.Format("15:04:05"),
+			NewStyle(ColorWhite),
+			image.Pt(self.grid.maxTimeWidth-xAxisLabelsWidth/2-i*(self.grid.paddingWidth), self.Inner.Max.Y-1),
+		)
+	}
+
+	// draw y axis labels
+	verticalScale := self.grid.valueExtremum.max - self.grid.valueExtremum.min/float64(self.Inner.Dy()-xAxisLabelsHeight-1)
+	for i := 1; i*(yAxisLabelsGap+1) <= self.Inner.Dy()-1; i++ {
+		buffer.SetString(
+			fmt.Sprintf("%.3f", float64(i)*self.grid.valueExtremum.min*verticalScale*(yAxisLabelsGap+1)),
+			NewStyle(ColorWhite),
+			image.Pt(self.Inner.Min.X, self.Inner.Max.Y-(i*(yAxisLabelsGap+1))-2),
+		)
+	}
+}
+
+func (self *RunChart) renderItems(buffer *Buffer, drawArea image.Rectangle) {
 
 	canvas := NewCanvas()
 	canvas.Rectangle = drawArea
@@ -193,7 +249,7 @@ func (self *RunChart) renderItems(buf *Buffer, drawArea image.Rectangle) {
 				previousPoint = xToPoint[pointsOrder[i-1]]
 			}
 
-			//buf.SetCell(
+			//buffer.SetCell(
 			//	NewCell(self.DotRune, NewStyle(SelectColor(self.LineColors, 0))),
 			//	currentPoint,
 			//)
@@ -206,68 +262,47 @@ func (self *RunChart) renderItems(buf *Buffer, drawArea image.Rectangle) {
 		}
 	}
 
-	canvas.Draw(buf)
+	canvas.Draw(buffer)
+}
+
+func (self *RunChart) renderLegend(buffer *Buffer, rectangle image.Rectangle) {
+	for i, line := range self.lines {
+
+		extremum := GetLineValueExtremum(line.points)
+
+		buffer.SetString(
+			fmt.Sprintf("•"),
+			NewStyle(line.item.Color),
+			image.Pt(self.Inner.Max.X-xAxisLegendWidth-2, self.Inner.Min.Y+1+i*5),
+		)
+		buffer.SetString(
+			fmt.Sprintf("%s", line.item.Label),
+			NewStyle(line.item.Color),
+			image.Pt(self.Inner.Max.X-xAxisLegendWidth, self.Inner.Min.Y+1+i*5),
+		)
+		buffer.SetString(
+			fmt.Sprintf("max %.3f", extremum.max),
+			NewStyle(ColorWhite),
+			image.Pt(self.Inner.Max.X-xAxisLegendWidth, self.Inner.Min.Y+2+i*5),
+		)
+		buffer.SetString(
+			fmt.Sprintf("min %.3f", extremum.min),
+			NewStyle(ColorWhite),
+			image.Pt(self.Inner.Max.X-xAxisLegendWidth, self.Inner.Min.Y+3+i*5),
+		)
+		buffer.SetString(
+			fmt.Sprintf("cur %.3f", line.points[len(line.points)-1].Value),
+			NewStyle(ColorWhite),
+			image.Pt(self.Inner.Max.X-xAxisLegendWidth, self.Inner.Min.Y+4+i*5),
+		)
+	}
 }
 
 func (self *RunChart) isTimePointInRange(point TimePoint) bool {
 	return point.Time.After(self.grid.timeExtremum.min.Add(self.grid.paddingDuration))
 }
 
-func (self *RunChart) plotAxes(buf *Buffer) {
+func GetChartValueExtremum(items []TimeLine) ValueExtremum {
-	// draw origin cell
-	buf.SetCell(
-		NewCell(BOTTOM_LEFT, NewStyle(ColorWhite)),
-		image.Pt(self.Inner.Min.X+yAxisLabelsWidth, self.Inner.Max.Y-xAxisLabelsHeight-1),
-	)
-
-	// draw x axis line
-	for i := yAxisLabelsWidth + 1; i < self.Inner.Dx(); i++ {
-		buf.SetCell(
-			NewCell(HORIZONTAL_DASH, NewStyle(ColorWhite)),
-			image.Pt(i+self.Inner.Min.X, self.Inner.Max.Y-xAxisLabelsHeight-1),
-		)
-	}
-
-	// draw grid
-	for y := 0; y < self.Inner.Dy()-xAxisLabelsHeight-1; y = y + 2 {
-		for x := 0; x < self.grid.linesCount; x++ {
-			buf.SetCell(
-				NewCell(VERTICAL_DASH, NewStyle(settings.ColorDarkGrey)),
-				image.Pt(self.grid.maxTimeWidth-x*self.grid.paddingWidth, y+self.Inner.Min.Y+1),
-			)
-		}
-	}
-
-	// draw y axis line
-	for i := 0; i < self.Inner.Dy()-xAxisLabelsHeight-1; i++ {
-		buf.SetCell(
-			NewCell(VERTICAL_DASH, NewStyle(ColorWhite)),
-			image.Pt(self.Inner.Min.X+yAxisLabelsWidth, i+self.Inner.Min.Y),
-		)
-	}
-
-	// draw x axis time labels
-	for i := 0; i < self.grid.linesCount; i++ {
-		labelTime := self.grid.timeExtremum.max.Add(time.Duration(-i) * time.Second)
-		buf.SetString(
-			labelTime.Format("15:04:05"),
-			NewStyle(ColorWhite),
-			image.Pt(self.grid.maxTimeWidth-xAxisLabelsWidth/2-i*(self.grid.paddingWidth), self.Inner.Max.Y-1),
-		)
-	}
-
-	// draw y axis labels
-	verticalScale := self.grid.valueExtremum.max - self.grid.valueExtremum.min/float64(self.Inner.Dy()-xAxisLabelsHeight-1)
-	for i := 1; i*(yAxisLabelsGap+1) <= self.Inner.Dy()-1; i++ {
-		buf.SetString(
-			fmt.Sprintf("%.3f", float64(i)*self.grid.valueExtremum.min*verticalScale*(yAxisLabelsGap+1)),
-			NewStyle(ColorWhite),
-			image.Pt(self.Inner.Min.X, self.Inner.Max.Y-(i*(yAxisLabelsGap+1))-2),
-		)
-	}
-}
-
-func GetValueExtremum(items []TimeLine) ValueExtremum {
 
 	if len(items) == 0 {
 		return ValueExtremum{0, 0}
@@ -289,6 +324,26 @@ func GetValueExtremum(items []TimeLine) ValueExtremum {
 	return ValueExtremum{max: max, min: min}
 }
 
+func GetLineValueExtremum(points []TimePoint) ValueExtremum {
+
+	if len(points) == 0 {
+		return ValueExtremum{0, 0}
+	}
+
+	var max, min = -math.MaxFloat64, math.MaxFloat64
+
+	for _, point := range points {
+		if point.Value > max {
+			max = point.Value
+		}
+		if point.Value < min {
+			min = point.Value
+		}
+	}
+
+	return ValueExtremum{max: max, min: min}
+}
+
 func GetTimeExtremum(linesCount int, paddingDuration time.Duration) TimeExtremum {
 	maxTime := time.Now()
 	return TimeExtremum{