Add widgets demos

Fix trim bug in helper.go
Add todos

README.md

@@ -72,11 +72,47 @@ The `helloworld` color scheme drops in some colors!
 
 ## Widgets
 
-_APIs are subject to change, docs will be added after 1 or 2 commits_
+#### Par
+
+[Demo code](https://github.com/gizak/termui/blob/master/example/par.go)
+
+<img src="./example/par.png" alt="par" type="image/png" width="300">
+
+#### List
+[demo code](https://github.com/gizak/termui/blob/master/example/list.go)
+
+<img src="./example/list.png" alt="list" type="image/png" width="200">
+
+#### Gauge
+[Demo code](https://github.com/gizak/termui/blob/master/example/gauge.go)
+
+<img src="./example/gauge.png" alt="gauge" type="image/png" width="300">
+
+#### Line Chart
+[Demo code](https://github.com/gizak/termui/blob/master/example/linechart.go)
+
+<img src="./example/linechart.png" alt="linechart" type="image/png" width="400">
+
+#### Bar Chart
+[Demo code](https://github.com/gizak/termui/blob/master/example/barchart.go)
+
+<img src="./example/barchart.png" alt="barchart" type="image/png" width="120">
+
+#### Sparklines
+[Demo code](https://github.com/gizak/termui/blob/master/example/sparklines.go)
+
+<img src="./example/sparklines.png" alt="sparklines" type="image/png" width="300">
+
 
 ## GoDoc
 
 [godoc](https://godoc.org/github.com/gizak/termui).
 
+## TODO
+
+[1] Float layout
+
+[2] Event system
+
 ## License
 This library is under the [MIT License](http://opensource.org/licenses/MIT)

example/barchart.go

@@ -0,0 +1,30 @@
+package main
+
+import "github.com/gizak/termui"
+import "github.com/nsf/termbox-go"
+
+func main() {
+	err := termui.Init()
+	if err != nil {
+		panic(err)
+	}
+	defer termui.Close()
+
+	termui.UseTheme("helloworld")
+
+	bc := termui.NewBarChart()
+	data := []int{3, 2, 5, 3, 9, 5, 3, 2, 5, 8, 3, 2, 4, 5, 3, 2, 5, 7, 5, 3, 2, 6, 7, 4, 6, 3, 6, 7, 8, 3, 6, 4, 5, 3, 2, 4, 6, 4, 8, 5, 9, 4, 3, 6, 5, 3, 6}
+	bclabels := []string{"S0", "S1", "S2", "S3", "S4", "S5"}
+	bc.Border.Label = "Bar Chart"
+	bc.Data = data
+	bc.Width = 26
+	bc.Height = 10
+	bc.DataLabels = bclabels
+	bc.TextColor = termui.ColorGreen
+	bc.BarColor = termui.ColorRed
+	bc.NumColor = termui.ColorYellow
+
+	termui.Render(bc)
+
+	termbox.PollEvent()
+}

example/gauge.go

@@ -0,0 +1,48 @@
+package main
+
+import "github.com/gizak/termui"
+import "github.com/nsf/termbox-go"
+
+func main() {
+	err := termui.Init()
+	if err != nil {
+		panic(err)
+	}
+	defer termui.Close()
+
+	termui.UseTheme("helloworld")
+
+	g0 := termui.NewGauge()
+	g0.Percent = 40
+	g0.Width = 50
+	g0.Height = 3
+	g0.Border.Label = "Slim Gauge"
+	g0.BarColor = termui.ColorRed
+	g0.Border.FgColor = termui.ColorWhite
+	g0.Border.LabelFgColor = termui.ColorCyan
+
+	g2 := termui.NewGauge()
+	g2.Percent = 60
+	g2.Width = 50
+	g2.Height = 3
+	g2.PercentColor = termui.ColorBlue
+	g2.Y = 3
+	g2.Border.Label = "Slim Gauge"
+	g2.BarColor = termui.ColorYellow
+	g2.Border.FgColor = termui.ColorWhite
+
+	g1 := termui.NewGauge()
+	g1.Percent = 30
+	g1.Width = 50
+	g1.Height = 5
+	g1.Y = 6
+	g1.Border.Label = "Big Gauge"
+	g1.PercentColor = termui.ColorYellow
+	g1.BarColor = termui.ColorGreen
+	g1.Border.FgColor = termui.ColorWhite
+	g1.Border.LabelFgColor = termui.ColorMagenta
+
+	termui.Render(g0, g1, g2)
+
+	termbox.PollEvent()
+}

example/linechart.go

@@ -0,0 +1,63 @@
+package main
+
+import (
+	"math"
+
+	"github.com/gizak/termui"
+)
+import "github.com/nsf/termbox-go"
+
+func main() {
+	err := termui.Init()
+	if err != nil {
+		panic(err)
+	}
+	defer termui.Close()
+
+	termui.UseTheme("helloworld")
+
+	sinps := (func() []float64 {
+		n := 220
+		ps := make([]float64, n)
+		for i := range ps {
+			ps[i] = 1 + math.Sin(float64(i)/5)
+		}
+		return ps
+	})()
+
+	lc0 := termui.NewLineChart()
+	lc0.Border.Label = "braille-mode Line Chart"
+	lc0.Data = sinps
+	lc0.Width = 50
+	lc0.Height = 12
+	lc0.X = 0
+	lc0.Y = 0
+	lc0.AxesColor = termui.ColorWhite
+	lc0.LineColor = termui.ColorGreen | termui.AttrBold
+
+	lc1 := termui.NewLineChart()
+	lc1.Border.Label = "dot-mode Line Chart"
+	lc1.Mode = "dot"
+	lc1.Data = sinps
+	lc1.Width = 26
+	lc1.Height = 12
+	lc1.X = 51
+	lc1.DotStyle = '+'
+	lc1.AxesColor = termui.ColorWhite
+	lc1.LineColor = termui.ColorYellow | termui.AttrBold
+
+	lc2 := termui.NewLineChart()
+	lc2.Border.Label = "dot-mode Line Chart"
+	lc2.Mode = "dot"
+	lc2.Data = sinps[4:]
+	lc2.Width = 77
+	lc2.Height = 16
+	lc2.X = 0
+	lc2.Y = 12
+	lc2.AxesColor = termui.ColorWhite
+	lc2.LineColor = termui.ColorCyan | termui.AttrBold
+
+	termui.Render(lc0, lc1, lc2)
+
+	termbox.PollEvent()
+}

example/list.go

@@ -0,0 +1,36 @@
+package main
+
+import "github.com/gizak/termui"
+import "github.com/nsf/termbox-go"
+
+func main() {
+	err := termui.Init()
+	if err != nil {
+		panic(err)
+	}
+	defer termui.Close()
+
+	termui.UseTheme("helloworld")
+
+	strs := []string{
+		"[0] github.com/gizak/termui",
+		"[1] editbox.go",
+		"[2] iterrupt.go",
+		"[3] keyboard.go",
+		"[4] output.go",
+		"[5] random_out.go",
+		"[6] dashboard.go",
+		"[7] nsf/termbox-go"}
+
+	ls := termui.NewList()
+	ls.Items = strs
+	ls.ItemFgColor = termui.ColorYellow
+	ls.Border.Label = "List"
+	ls.Height = 7
+	ls.Width = 25
+	ls.Y = 0
+
+	termui.Render(ls)
+
+	termbox.PollEvent()
+}

example/par.go

@@ -0,0 +1,43 @@
+package main
+
+import "github.com/gizak/termui"
+import "github.com/nsf/termbox-go"
+
+func main() {
+	err := termui.Init()
+	if err != nil {
+		panic(err)
+	}
+	defer termui.Close()
+
+	termui.UseTheme("helloworld")
+
+	par0 := termui.NewPar("Borderless Text")
+	par0.Height = 1
+	par0.Width = 20
+	par0.Y = 1
+	par0.HasBorder = false
+
+	par1 := termui.NewPar("Simple Text")
+	par1.Height = 3
+	par1.Width = 17
+	par1.X = 20
+	par1.Border.Label = "Label"
+
+	par2 := termui.NewPar("Simple text\nwith label. It can be multilined with \\n or break automatically")
+	par2.Height = 5
+	par2.Width = 37
+	par2.Y = 4
+	par2.Border.Label = "Multiline"
+	par2.Border.FgColor = termui.ColorYellow
+
+	par3 := termui.NewPar("Long text with label and it is auto trimmed.")
+	par3.Height = 3
+	par3.Width = 37
+	par3.Y = 9
+	par3.Border.Label = "Auto Trim"
+
+	termui.Render(par0, par1, par2, par3)
+
+	termbox.PollEvent()
+}

example/sparklines.go

@@ -0,0 +1,60 @@
+package main
+
+import "github.com/gizak/termui"
+import "github.com/nsf/termbox-go"
+
+func main() {
+	err := termui.Init()
+	if err != nil {
+		panic(err)
+	}
+	defer termui.Close()
+
+	termui.UseTheme("helloworld")
+
+	data := []int{4, 2, 1, 6, 3, 9, 1, 4, 2, 15, 14, 9, 8, 6, 10, 13, 15, 12, 10, 5, 3, 6, 1, 7, 10, 10, 14, 13, 6}
+	spl0 := termui.NewSparkline()
+	spl0.Data = data[3:]
+	spl0.Title = "Sparkline 0"
+	spl0.LineColor = termui.ColorGreen
+
+	// single
+	spls0 := termui.NewSparklines(spl0)
+	spls0.Height = 2
+	spls0.Width = 20
+	spls0.HasBorder = false
+
+	spl1 := termui.NewSparkline()
+	spl1.Data = data
+	spl1.Title = "Sparkline 1"
+	spl1.LineColor = termui.ColorRed
+
+	spl2 := termui.NewSparkline()
+	spl2.Data = data[5:]
+	spl2.Title = "Sparkline 2"
+	spl2.LineColor = termui.ColorMagenta
+
+	// group
+	spls1 := termui.NewSparklines(spl0, spl1, spl2)
+	spls1.Height = 8
+	spls1.Width = 20
+	spls1.Y = 3
+	spls1.Border.Label = "Group Sparklines"
+
+	spl3 := termui.NewSparkline()
+	spl3.Data = data
+	spl3.Title = "Enlarged Sparkline"
+	spl3.Height = 8
+	spl3.LineColor = termui.ColorYellow
+
+	spls2 := termui.NewSparklines(spl3)
+	spls2.Height = 11
+	spls2.Width = 30
+	spls2.Border.FgColor = termui.ColorCyan
+	spls2.X = 21
+	spls2.Border.Label = "Tweeked Sparkline"
+
+	termui.Render(spls0, spls1, spls2)
+
+	termbox.PollEvent()
+}

helper.go

@@ -46,8 +46,8 @@ func trimStr2Runes(s string, w int) []rune {
 	}
 	sw := rw.StringWidth(s)
 	if sw+dotw >= w {
-		return []rune(rw.Truncate(s, w, ""))
-	} else {
 		return []rune(rw.Truncate(s, w, "…"))
+	} else {
+		return []rune(rw.Truncate(s, w, ""))
 	}
 }

p.go

@@ -27,6 +27,15 @@ func (p *Par) Buffer() []Point {
 			if rs[k] == '\n' {
 				k++
 			}
+
+			if i >= p.innerHeight {
+				ps = append(ps, newPointWithAttrs('…',
+					p.innerX+p.innerWidth-1,
+					p.innerY+p.innerHeight-1,
+					p.TextFgColor, p.TextBgColor))
+				break
+			}
+
 			continue
 		}
 		pi := Point{}
@@ -38,6 +47,7 @@ func (p *Par) Buffer() []Point {
 		pi.Fg = p.TextFgColor
 
 		ps = append(ps, pi)
+
 		k++
 		j++
 	}

sparkline.go

@@ -102,16 +102,16 @@ func (sl *Sparklines) Buffer() []Point {
 		}
 
 		for j, v := range data {
-			h := int(float32(v) * l.scale)
+			h := int(float32(v)*l.scale + 0.5)
 			barCnt := h / 8
 			barMod := h % 8
 			for jj := 0; jj < barCnt; jj++ {
 				p := Point{}
 				p.X = sl.innerX + j
 				p.Y = sl.innerY + oftY + l.Height - jj
-				p.Ch = sparks[7]
+				p.Ch = ' ' //sparks[7]
-				p.Fg = l.LineColor
+				p.Bg = l.LineColor
-				p.Bg = sl.BgColor
+				//p.Bg = sl.BgColor
 				ps = append(ps, p)
 			}
 			if barMod != 0 {