added barchart component

config.yml

@@ -1,65 +1,71 @@
 runcharts:
-- title: SEARCH ENGINE RESPONSE TIME (sec)
+  - title: SEARCH ENGINE RESPONSE TIME (sec)
-  position:
+    position:
-    w: 0
+      w: 0
-    h: 0
+      h: 0
-  size:
+    size:
-    w: 50
+      w: 50
-    h: 14
+      h: 14
-  precision: 3
+    scale: 3
-  items:
+    items:
-  - label: GOOGLE
+      - label: GOOGLE
-    script: curl -o /dev/null -s -w '%{time_total}'  https://www.google.com
+        script: curl -o /dev/null -s -w '%{time_total}'  https://www.google.com
-  - label: YAHOO
+      - label: YAHOO
-    script: curl -o /dev/null -s -w '%{time_total}'  https://search.yahoo.com
+        script: curl -o /dev/null -s -w '%{time_total}'  https://search.yahoo.com
-  - label: BING
+      - label: BING
-    script: curl -o /dev/null -s -w '%{time_total}'  https://www.bing.com
+        script: curl -o /dev/null -s -w '%{time_total}'  https://www.bing.com
-- title: SEARCH ENGINE RESPONSE TIME 2 (sec)
+  - title: SEARCH ENGINE RESPONSE TIME 2 (sec)
-  refresh-rate-ms: 5000
+    refresh-rate-ms: 5000
-  position:
+    position:
-    w: 0
+      w: 0
-    h: 14
+      h: 14
-  size:
+    size:
-    w: 17
+      w: 17
-    h: 10
+      h: 10
-  legend:
+    legend:
-    enabled: true
+      enabled: true
-    details: false
+      details: false
-  items:
+    items:
-  - label: GOOGLE
+      - label: GOOGLE
-    script: curl -o /dev/null -s -w '%{time_total}'  https://www.google.com
+        script: curl -o /dev/null -s -w '%{time_total}'  https://www.google.com
-  - label: YAHOO
+      - label: YAHOO
-    script: curl -o /dev/null -s -w '%{time_total}'  https://search.yahoo.com
+        script: curl -o /dev/null -s -w '%{time_total}'  https://search.yahoo.com
-  - label: BING
+      - label: BING
-    script: curl -o /dev/null -s -w '%{time_total}'  https://www.bing.com
+        script: curl -o /dev/null -s -w '%{time_total}'  https://www.bing.com
-- title: MONGO COLLECTIONS COUNT
+  - title: MONGO COLLECTIONS COUNT
-  precision: 0
+    position:
-  position:
+      w: 17
-    w: 17
+      h: 14
-    h: 14
+    size:
-  size:
+      w: 17
-    w: 17
+      h: 10
-    h: 10
+    scale: 0
-  items:
+    items:
+      - label: ACTIVE
+        script: mongo --quiet --host=localhost blog --eval "db.getCollection('posts').find({status:'ACTIVE'}).itcount()"
+      - label: INACTIVE
+        script: mongo --quiet --host=localhost blog --eval "db.getCollection('posts').find({status:'INACTIVE'}).itcount()"
+barcharts:
+  - title: ANCHOR CONTEXT EVENTS
   - label: ACTIVE
-    script: mongo --quiet --host=localhost blog --eval "db.getCollection('posts').find({status:'ACTIVE'}).size()"
+    script: mongo --quiet --host=localhost blog --eval "db.getCollection('posts').find({status:'ACTIVE'}).itcount()"
   - label: INACTIVE
-    script: mongo --quiet --host=localhost blog --eval "db.getCollection('posts').find({status:'INACTIVE'}).size()"
+    script: mongo --quiet --host=localhost blog --eval "db.getCollection('posts').find({status:'INACTIVE'}).itcount()"
 asciiboxes:
-- title: COUNT
+  - title: COUNT
-  position:
+    position:
-    w: 34
+      w: 34
-    h: 14
+      h: 14
-  size:
+    size:
-    w: 16
+      w: 16
-    h: 4
+      h: 4
-  script: date +%r
+    script: date +%r
-- title: MODE
+  - title: MODE
-  position:
+    position:
-    w: 34
+      w: 34
-    h: 18
+      h: 18
-  size:
+    size:
-    w: 16
+      w: 16
-    h: 6
+      h: 6
-  script: date +%r
+    script: date +%r
-  font: 3d
+    font: 3d

config/config.go

@@ -14,6 +14,7 @@ import (
 type Config struct {
 	Theme      *console.Theme   `yaml:"theme,omitempty"`
 	RunCharts  []RunChartConfig `yaml:"runcharts,omitempty"`
+	BarCharts  []BarChartConfig `yaml:"barcharts,omitempty"`
 	AsciiBoxes []AsciiBoxConfig `yaml:"asciiboxes,omitempty"`
 }
 
@@ -27,10 +28,16 @@ type ComponentConfig struct {
 type RunChartConfig struct {
 	ComponentConfig `yaml:",inline"`
 	Legend          *LegendConfig `yaml:"legend,omitempty"`
-	Precision       *int          `yaml:"precision,omitempty"`
+	Scale           *int          `yaml:"scale,omitempty"`
 	Items           []data.Item   `yaml:"items"`
 }
 
+type BarChartConfig struct {
+	ComponentConfig `yaml:",inline"`
+	Scale           *int        `yaml:"scale,omitempty"`
+	Items           []data.Item `yaml:"items"`
+}
+
 type AsciiBoxConfig struct {
 	ComponentConfig `yaml:",inline"`
 	data.Item       `yaml:",inline"`

config/default.go

@@ -7,7 +7,7 @@ import (
 
 const (
 	defaultRefreshRateMs = 1000
-	defaultPrecision     = 1
+	defaultScale         = 1
 	defaultTheme         = console.ThemeDark
 )
 
@@ -29,9 +29,9 @@ func (c *Config) setDefaultValues() {
 			r := defaultRefreshRateMs
 			chart.RefreshRateMs = &r
 		}
-		if chart.Precision == nil {
+		if chart.Scale == nil {
-			p := defaultPrecision
+			p := defaultScale
-			chart.Precision = &p
+			chart.Scale = &p
 		}
 		if chart.Legend == nil {
 			chart.Legend = &LegendConfig{true, true}

go.mod

@@ -3,7 +3,7 @@ module github.com/sqshq/sampler
 require (
 	github.com/hajimehoshi/go-mp3 v0.1.1
 	github.com/hajimehoshi/oto v0.1.1
-	github.com/mattn/go-runewidth v0.0.4 // indirect
+	github.com/mattn/go-runewidth v0.0.4
 	github.com/mbndr/figlet4go v0.0.0-20170909125910-47ded4d17030
 	github.com/mitchellh/go-wordwrap v1.0.0 // indirect
 	github.com/sqshq/termui v0.0.0-20190125032456-731556c09f2c

main.go

@@ -7,6 +7,7 @@ import (
 	"github.com/sqshq/sampler/event"
 	"github.com/sqshq/sampler/widgets"
 	"github.com/sqshq/sampler/widgets/asciibox"
+	"github.com/sqshq/sampler/widgets/barchart"
 	"github.com/sqshq/sampler/widgets/runchart"
 	ui "github.com/sqshq/termui"
 	"time"
@@ -25,7 +26,7 @@ func main() {
 	for _, c := range cfg.RunCharts {
 
 		legend := runchart.Legend{Enabled: c.Legend.Enabled, Details: c.Legend.Details}
-		chart := runchart.NewRunChart(c.Title, *c.Precision, *c.RefreshRateMs, legend)
+		chart := runchart.NewRunChart(c.Title, *c.Scale, *c.RefreshRateMs, legend)
 		layout.AddComponent(chart, c.Title, c.Position, c.Size, config.TypeRunChart)
 
 		for _, item := range c.Items {
@@ -40,6 +41,17 @@ func main() {
 		data.NewSampler(box, a.Item, *a.RefreshRateMs)
 	}
 
+	for _, c := range cfg.BarCharts {
+
+		chart := barchart.NewBarChart(c.Title, *c.Scale)
+		layout.AddComponent(chart, c.Title, c.Position, c.Size, config.TypeBarChart)
+
+		for _, item := range c.Items {
+			chart.AddBar(*item.Label, *item.Color)
+			data.NewSampler(chart, item, *c.RefreshRateMs)
+		}
+	}
+
 	handler := event.Handler{
 		Layout:        layout,
 		RenderEvents:  time.NewTicker(console.RenderRate).C,

widgets/barchart/barchart.go

@@ -1,83 +1,109 @@
 package barchart
 
-//
+import (
-//import (
+	rw "github.com/mattn/go-runewidth"
-//	"fmt"
+	"github.com/sqshq/sampler/data"
-//	"image"
+	ui "github.com/sqshq/termui"
-//)
+	"image"
-//
+	"strconv"
-//type BarChart struct {
+)
-//	Block
+
-//	BarColors   []Color
+const (
-//	LabelStyles []Style
+	barSymbol rune = '⠿'
-//	NumStyles   []Style // only Fg and Modifier are used
+	barIndent int  = 1
-//	NumFmt      func(float64) string
+)
-//	Data        []float64
+
-//	Labels      []string
+type BarChart struct {
-//	BarWidth    int
+	ui.Block
-//	BarGap      int
+	bars     []Bar
-//	MaxVal      float64
+	scale    int
-//}
+	maxValue float64
-//
+}
-//func NewBarChart() *BarChart {
+
-//	return &BarChart{
+type Bar struct {
-//		Block:       *NewBlock(),
+	label string
-//		BarColors:   Theme.BarChart.Bars,
+	color ui.Color
-//		NumStyles:   Theme.BarChart.Nums,
+	value float64
-//		LabelStyles: Theme.BarChart.Labels,
+}
-//		NumFmt:      func(n float64) string { return fmt.Sprint(n) },
+
-//		BarGap:      1,
+func NewBarChart(title string, scale int) *BarChart {
-//		BarWidth:    3,
+	block := *ui.NewBlock()
-//	}
+	block.Title = title
-//}
+	return &BarChart{
-//
+		Block:    block,
-//func (self *BarChart) Draw(buf *Buffer) {
+		bars:     []Bar{},
-//	self.Block.Draw(buf)
+		scale:    scale,
-//
+		maxValue: 0,
-//	maxVal := self.MaxVal
+	}
-//	if maxVal == 0 {
+}
-//		maxVal, _ = GetMaxFloat64FromSlice(self.Data)
+
-//	}
+func (b *BarChart) AddBar(label string, color ui.Color) {
-//
+	b.bars = append(b.bars, Bar{label: label, color: color, value: 0})
-//	barXCoordinate := self.Inner.Min.X
+}
-//
+
-//	for i, data := range self.Data {
+func (b *BarChart) ConsumeSample(sample data.Sample) {
-//		// draw bar
+
-//		height := int((data / maxVal) * float64(self.Inner.Dy()-1))
+	float, err := strconv.ParseFloat(sample.Value, 64)
-//		for x := barXCoordinate; x < MinInt(barXCoordinate+self.BarWidth, self.Inner.Max.X); x++ {
+
-//			for y := self.Inner.Max.Y - 2; y > (self.Inner.Max.Y-2)-height; y-- {
+	if err != nil {
-//				c := NewCell(' ', NewStyle(ColorClear, SelectColor(self.BarColors, i)))
+		// TODO visual notification + check sample.Error
-//				buf.SetCell(c, image.Pt(x, y))
+	}
-//			}
+
-//		}
+	index := -1
-//
+	for i, bar := range b.bars {
-//		// draw label
+		if bar.label == sample.Label {
-//		if i < len(self.Labels) {
+			index = i
-//			labelXCoordinate := barXCoordinate +
+		}
-//				int((float64(self.BarWidth) / 2)) -
+	}
-//				int((float64(rw.StringWidth(self.Labels[i])) / 2))
+
-//			buf.SetString(
+	bar := b.bars[index]
-//				self.Labels[i],
+	bar.value = float
-//				SelectStyle(self.LabelStyles, i),
+	b.bars[index] = bar
-//				image.Pt(labelXCoordinate, self.Inner.Max.Y-1),
+}
-//			)
+
-//		}
+func (b *BarChart) Draw(buf *ui.Buffer) {
-//
+	b.Block.Draw(buf)
-//		// draw number
+
-//		numberXCoordinate := barXCoordinate + int((float64(self.BarWidth) / 2))
+	maxVal := b.maxValue
-//		if numberXCoordinate <= self.Inner.Max.X {
+
-//			buf.SetString(
+	barXCoordinate := b.Inner.Min.X
-//				self.NumFmt(data),
+
-//				NewStyle(
+	for i, data := range b.Data {
-//					SelectStyle(self.NumStyles, i+1).Fg,
+		// draw bar
-//					SelectColor(self.BarColors, i),
+		height := int((data / maxVal) * float64(b.Inner.Dy()-1))
-//					SelectStyle(self.NumStyles, i+1).Modifier,
+		for x := barXCoordinate; x < ui.MinInt(barXCoordinate+b.BarWidth, b.Inner.Max.X); x++ {
-//				),
+			for y := b.Inner.Max.Y - 2; y > (b.Inner.Max.Y-2)-height; y-- {
-//				image.Pt(numberXCoordinate, self.Inner.Max.Y-2),
+				c := ui.NewCell(barSymbol, ui.NewStyle(ui.SelectColor(b.BarColors, i)))
-//			)
+				buf.SetCell(c, image.Pt(x, y))
-//		}
+			}
-//
+		}
-//		barXCoordinate += (self.BarWidth + self.BarGap)
+
-//	}
+		// draw label
-//}
+		if i < len(b.Labels) {
-//
+			labelXCoordinate := barXCoordinate +
+				int((float64(b.BarWidth) / 2)) -
+				int((float64(rw.StringWidth(b.Labels[i])) / 2))
+			buf.SetString(
+				b.Labels[i],
+				ui.SelectStyle(b.LabelStyles, i),
+				image.Pt(labelXCoordinate, b.Inner.Max.Y-1),
+			)
+		}
+
+		// draw value
+		numberXCoordinate := barXCoordinate + int((float64(b.BarWidth) / 2))
+		if numberXCoordinate <= b.Inner.Max.X {
+			buf.SetString(
+				b.NumFmt(data),
+				ui.NewStyle(
+					ui.SelectStyle(b.NumStyles, i+1).Fg,
+					ui.SelectColor(b.BarColors, i),
+					ui.SelectStyle(b.NumStyles, i+1).Modifier,
+				),
+				image.Pt(numberXCoordinate, b.Inner.Max.Y-2),
+			)
+		}
+
+		barXCoordinate += (b.BarWidth + b.BarGap)
+	}
+}

widgets/runchart/grid.go

@@ -77,13 +77,13 @@ func (c *RunChart) renderAxes(buffer *ui.Buffer) {
 		for i := 0; i < int(labelsCount); i++ {
 			value := c.grid.valueExtrema.max - (valuePerY * float64(i) * (yAxisLabelsIndent + yAxisLabelsHeight))
 			buffer.SetString(
-				formatValue(value, c.precision),
+				formatValue(value, c.scale),
 				ui.NewStyle(ui.ColorWhite),
 				image.Pt(c.Inner.Min.X, 1+c.Inner.Min.Y+i*(yAxisLabelsIndent+yAxisLabelsHeight)))
 		}
 	} else {
 		buffer.SetString(
-			formatValue(c.grid.valueExtrema.max, c.precision),
+			formatValue(c.grid.valueExtrema.max, c.scale),
 			ui.NewStyle(ui.ColorWhite),
 			image.Pt(c.Inner.Min.X, c.Inner.Min.Y+c.Inner.Dy()/2))
 	}

widgets/runchart/legend.go

@@ -38,7 +38,7 @@ func (c *RunChart) renderLegend(buffer *ui.Buffer, rectangle image.Rectangle) {
 
 	rowCount := (c.Dy() - 2*yAxisLegendIndent) / (height + yAxisLegendIndent)
 	columnCount := int(math.Ceil(float64(len(c.lines)) / float64(rowCount)))
-	columnWidth := getColumnWidth(c.mode, c.lines, c.precision)
+	columnWidth := getColumnWidth(c.mode, c.lines, c.scale)
 
 	for col := 0; col < columnCount; col++ {
 		for row := 0; row < rowCount; row++ {
@@ -61,7 +61,7 @@ func (c *RunChart) renderLegend(buffer *ui.Buffer, rectangle image.Rectangle) {
 
 			if c.mode == ModePinpoint {
 				buffer.SetString(fmt.Sprintf("time  %s", line.selectionPoint.time.Format("15:04:05.000")), detailsStyle, image.Pt(x, y+1))
-				buffer.SetString(fmt.Sprintf("value %s", formatValue(line.selectionPoint.value, c.precision)), detailsStyle, image.Pt(x, y+2))
+				buffer.SetString(fmt.Sprintf("value %s", formatValue(line.selectionPoint.value, c.scale)), detailsStyle, image.Pt(x, y+2))
 				continue
 			}
 
@@ -70,10 +70,10 @@ func (c *RunChart) renderLegend(buffer *ui.Buffer, rectangle image.Rectangle) {
 			}
 
 			details := [4]string{
-				fmt.Sprintf("cur  %s", formatValue(getCurrentValue(line), c.precision)),
+				fmt.Sprintf("cur  %s", formatValue(getCurrentValue(line), c.scale)),
-				fmt.Sprintf("dlt %s", formatValueWithSign(getDiffWithPreviousValue(line), c.precision)),
+				fmt.Sprintf("dlt %s", formatValueWithSign(getDiffWithPreviousValue(line), c.scale)),
-				fmt.Sprintf("max  %s", formatValue(line.extrema.max, c.precision)),
+				fmt.Sprintf("max  %s", formatValue(line.extrema.max, c.scale)),
-				fmt.Sprintf("min  %s", formatValue(line.extrema.min, c.precision)),
+				fmt.Sprintf("min  %s", formatValue(line.extrema.min, c.scale)),
 			}
 
 			for i, detail := range details {
@@ -83,13 +83,13 @@ func (c *RunChart) renderLegend(buffer *ui.Buffer, rectangle image.Rectangle) {
 	}
 }
 
-func getColumnWidth(mode Mode, lines []TimeLine, precision int) int {
+func getColumnWidth(mode Mode, lines []TimeLine, scale int) int {
 
 	if mode == ModePinpoint {
 		return len(timeFormat)
 	}
 
-	width := len(formatValue(0, precision))
+	width := len(formatValue(0, scale))
 	for _, line := range lines {
 		if len(line.label) > width {
 			width = len(line.label)

widgets/runchart/runchart.go

@@ -42,7 +42,7 @@ type RunChart struct {
 	mutex     *sync.Mutex
 	mode      Mode
 	selection time.Time
-	precision int
+	scale     int
 	legend    Legend
 }
 
@@ -71,7 +71,7 @@ type ValueExtrema struct {
 	min float64
 }
 
-func NewRunChart(title string, precision int, refreshRateMs int, legend Legend) *RunChart {
+func NewRunChart(title string, scale int, refreshRateMs int, legend Legend) *RunChart {
 	block := *ui.NewBlock()
 	block.Title = title
 	return &RunChart{
@@ -79,7 +79,7 @@ func NewRunChart(title string, precision int, refreshRateMs int, legend Legend)
 		lines:     []TimeLine{},
 		timescale: calculateTimescale(refreshRateMs),
 		mutex:     &sync.Mutex{},
-		precision: precision,
+		scale:     scale,
 		mode:      ModeDefault,
 		legend:    legend,
 	}
@@ -285,7 +285,7 @@ func (c *RunChart) getMaxValueLength() int {
 
 	for _, line := range c.lines {
 		for _, point := range line.points {
-			l := len(formatValue(point.value, c.precision))
+			l := len(formatValue(point.value, c.scale))
 			if l > maxValueLength {
 				maxValueLength = l
 			}
@@ -327,22 +327,22 @@ func getMidRangeTime(r TimeRange) time.Time {
 	return r.max.Add(-delta / 2)
 }
 
-func formatValue(value float64, precision int) string {
+func formatValue(value float64, scale int) string {
 	if math.Abs(value) == math.MaxFloat64 {
 		return "Inf"
 	} else {
-		format := "%." + strconv.Itoa(precision) + "f"
+		format := "%." + strconv.Itoa(scale) + "f"
 		return fmt.Sprintf(format, value)
 	}
 }
 
-func formatValueWithSign(value float64, precision int) string {
+func formatValueWithSign(value float64, scale int) string {
 	if value == 0 {
 		return " 0"
 	} else if value > 0 {
-		return "+" + formatValue(value, precision)
+		return "+" + formatValue(value, scale)
 	} else {
-		return formatValue(value, precision)
+		return formatValue(value, scale)
 	}
 }