# termui [](https://travis-ci.org/gizak/termui) [](https://godoc.org/github.com/gizak/termui)
## Update 23/06/2015
Pull requests and master branch are freezing, waiting for merging from `refactoring` branch.
## Notice
termui comes with ABSOLUTELY NO WARRANTY, and there is a breaking change coming up (see refactoring branch) which will change the `Bufferer` interface and many others. These changes reduce calculation overhead and introduce a new drawing buffer with better capacibilities. We will step into the next stage (call it beta) after merging these changes.
## Introduction
Go terminal dashboard. Inspired by [blessed-contrib](https://github.com/yaronn/blessed-contrib), but purely in Go.
Cross-platform, easy to compile, and fully-customizable.
__Demo:__ (cast under osx 10.10; Terminal.app; Menlo Regular 12pt.)
<img src="./example/dashboard.gif" alt="demo" width="600">
__Grid layout:__
Expressive syntax, using [12 columns grid system](http://www.w3schools.com/bootstrap/bootstrap_grid_system.asp)
```go
import ui "github.com/gizak/termui"
// init and create widgets...
// build
ui.Body.AddRows(
ui.NewRow(
ui.NewCol(6, 0, widget0),
ui.NewCol(6, 0, widget1)),
ui.NewRow(
ui.NewCol(3, 0, widget2),
ui.NewCol(3, 0, widget30, widget31, widget32),
ui.NewCol(6, 0, widget4)))
// calculate layout
ui.Body.Align()
ui.Render(ui.Body)
```
[demo code:](https://github.com/gizak/termui/blob/master/example/grid.go)
<img src="./example/grid.gif" alt="grid" width="500">
## Installation
go get github.com/gizak/termui
## Usage
Each component's layout is a bit like HTML block (box model), which has border and padding.
The `Border` property can be chosen to hide or display (with its border label), when it comes to display, the label takes 1 padding space (i.e. in css: `padding: 1;`, innerHeight and innerWidth therefore shrunk by 1).
`````go
import ui "github.com/gizak/termui" // <- ui shortcut, optional
func main() {
err := ui.Init()
if err != nil {
panic(err)
}
defer ui.Close()
p := ui.NewPar(":PRESS q TO QUIT DEMO")
p.Height = 3
p.Width = 50
p.TextFgColor = ui.ColorWhite
p.Border.Label = "Text Box"
p.Border.FgColor = ui.ColorCyan
g := ui.NewGauge()
g.Percent = 50
g.Width = 50
g.Height = 3
g.Y = 11
g.Border.Label = "Gauge"
g.BarColor = ui.ColorRed
g.Border.FgColor = ui.ColorWhite
g.Border.LabelFgColor = ui.ColorCyan
ui.Render(p, g)
// event handler...
}
`````
Note that components can be overlapped (I'd rather call this a feature...), `Render(rs ...Renderer)` renders its args from left to right (i.e. each component's weight is arising from left to right).
## Themes
_All_ colors in _all_ components can be changed at _any_ time, while there provides some predefined color schemes:
```go
// for now there are only two themes: default and helloworld
termui.UseTheme("helloworld")
// create components...
```
The `default ` theme's settings depend on the user's terminal color scheme, which is saying if your terminal default font color is white and background is white, it will be like:
<img src="./example/themedefault.png" alt="default" type="image/png" width="600">
The `helloworld` color scheme drops in some colors!
<img src="./example/themehelloworld.png" alt="helloworld" type="image/png" width="600">
## Widgets
#### 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="350">
#### 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="450">
#### 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="150">
#### Mult-Bar / Stacked-Bar Chart
[demo code](https://github.com/gizak/termui/blob/master/example/mbarchart.go)
<img src="./example/mbarchart.png" alt="barchart" type="image/png" width="150">
#### Sparklines
[demo code](https://github.com/gizak/termui/blob/master/example/sparklines.go)
<img src="./example/sparklines.png" alt="sparklines" type="image/png" width="350">
## GoDoc
[godoc](https://godoc.org/github.com/gizak/termui)
## TODO
- [x] Grid layout
- [ ] Event system
- [ ] Canvas widget
- [ ] Refine APIs
- [ ] Focusable widgets
## License
This library is under the [MIT License](http://opensource.org/licenses/MIT)
