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# termui [![Build Status](https://travis-ci.org/gizak/termui.svg?branch=master)](https://travis-ci.org/gizak/termui) [![Doc Status](https://godoc.org/github.com/gizak/termui?status.png)](https://godoc.org/github.com/gizak/termui) # termui
<img src="./_examples/dashboard.gif" alt="demo cast under osx 10.10; Terminal.app; Menlo Regular 12pt.)" width="80%"> [![Build Status](https://travis-ci.org/gizak/termui.svg?branch=master)](https://travis-ci.org/gizak/termui) [![Doc Status](https://godoc.org/github.com/gizak/termui?status.png)](https://godoc.org/github.com/gizak/termui)
`termui` is a cross-platform, easy-to-compile, and fully-customizable terminal dashboard. It is inspired by [blessed-contrib](https://github.com/yaronn/blessed-contrib), but purely in Go. <img src="./_examples/dashboard.gif" alt="demo cast under osx 10.10; Terminal.app; Menlo Regular 12pt.)" width="100%">
Now version v2 has arrived! It brings new event system, new theme system, new `Buffer` interface and specific colour text rendering. (some docs are missing, but it will be completed soon!) `termui` is a cross-platform, easy-to-compile, and fully-customizable terminal dashboard built on top of [termbox-go](https://github.com/nsf/termbox-go). It is inspired by [blessed-contrib](https://github.com/yaronn/blessed-contrib) and written purely in Go.
## Installation ## Installation
`master` mirrors v2 branch, to install: It's recommended to install from the master branch:
```bash ```bash
go get -u github.com/gizak/termui go get -u github.com/gizak/termui@master
``` ```
It is recommanded to use locked deps by using [dep](https://golang.github.io/dep/): move to `termui` src directory then run `dep ensure`. Note that termui is currently undergoing major API changes so be prepared for things to break if you upgrade.
For the compatible reason, you can choose to install the legacy version of `termui`:
```bash
go get gopkg.in/gizak/termui.v1
```
## Usage ## Usage
### Layout ### Hello World
To use `termui`, the very first thing you may want to know is how to manage layout. `termui` offers two ways of doing this, known as absolute layout and grid layout.
**Absolute layout**
Each widget has an underlying block structure which basically is a box model. It has border, label and padding properties. A border of a widget can be chosen to hide or display (with its border label), you can pick a different front/back colour for the border as well. To display such a widget at a specific location in terminal window, you need to assign `.X`, `.Y`, `.Height`, `.Width` values for each widget before sending it to `.Render`. Let's demonstrate these by a code snippet:
```go ```go
import ui "github.com/gizak/termui" // <- ui shortcut, optional import ui "github.com/gizak/termui"
func main() { func main() {
err := ui.Init() err := ui.Init()
if err != nil { if err != nil {
panic(err) panic(err)
}
defer ui.Close()
p := ui.NewPar(":PRESS q TO QUIT DEMO")
p.Height = 3
p.Width = 50
p.TextFgColor = ui.ColorWhite
p.BorderLabel = "Text Box"
p.BorderFg = ui.ColorCyan
g := ui.NewGauge()
g.Percent = 50
g.Width = 50
g.Height = 3
g.Y = 11
g.BorderLabel = "Gauge"
g.BarColor = ui.ColorRed
g.BorderFg = ui.ColorWhite
g.BorderLabelFg = ui.ColorCyan
ui.Render(p, g) // feel free to call Render, it's async and non-block
// event handler...
} }
``` defer ui.Close()
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). p := ui.NewParagraph("Hello World")
ui.Render(p)
**Grid layout:** for {
e := <-ui.PollEvent()
<img src="./_examples/grid.gif" alt="grid" width="60%"> switch e.ID {
case "q", "<C-c>":
Grid layout uses [12 columns grid system](http://www.w3schools.com/bootstrap/bootstrap_grid_system.asp) with expressive syntax. To use `Grid`, all we need to do is build a widget tree consisting of `Row`s and `Col`s (Actually a `Col` is also a `Row` but with a widget endpoint attached). return
```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)
```
### Events
`termui` ships with a http-like event mux handling system. All events are channeled up from different sources (typing, click, windows resize, custom event) and then encoded as universal `Event` object. `Event.Path` indicates the event type and `Event.Data` stores the event data struct. Add a handler to a certain event is easy as below:
```go
// handle key q pressing
ui.Handle("/sys/kbd/q", func(ui.Event) {
// press q to quit
ui.StopLoop()
})
ui.Handle("/sys/kbd/C-x", func(ui.Event) {
// handle Ctrl + x combination
})
ui.Handle("/sys/kbd", func(ui.Event) {
// handle all other key pressing
})
// handle a 1s timer
ui.Handle("/timer/1s", func(e ui.Event) {
t := e.Data.(ui.EvtTimer)
// t is a EvtTimer
if t.Count%2 ==0 {
// do something
} }
}) }
}
ui.Loop() // block until StopLoop is called
``` ```
### Widgets ### Widgets
Click image to see the corresponding demo codes. Click image to see the corresponding demo codes.
[<img src="./_examples/par.png" alt="par" type="image/png" width="45%">](https://github.com/gizak/termui/blob/master/_examples/par.go) [<img src="./_examples/barchart.png" alt="barchart" type="image/png" width="45%">](https://github.com/gizak/termui/blob/master/_examples/barchart.go)
[<img src="./_examples/list.png" alt="list" type="image/png" width="45%">](https://github.com/gizak/termui/blob/master/_examples/list.go)
[<img src="./_examples/gauge.png" alt="gauge" type="image/png" width="45%">](https://github.com/gizak/termui/blob/master/_examples/gauge.go) [<img src="./_examples/gauge.png" alt="gauge" type="image/png" width="45%">](https://github.com/gizak/termui/blob/master/_examples/gauge.go)
[<img src="./_examples/linechart.png" alt="linechart" type="image/png" width="45%">](https://github.com/gizak/termui/blob/master/_examples/linechart.go) [<img src="./_examples/linechart.png" alt="linechart" type="image/png" width="45%">](https://github.com/gizak/termui/blob/master/_examples/linechart.go)
[<img src="./_examples/barchart.png" alt="barchart" type="image/png" width="45%">](https://github.com/gizak/termui/blob/master/_examples/barchart.go) [<img src="./_examples/list.png" alt="list" type="image/png" width="45%">](https://github.com/gizak/termui/blob/master/_examples/list.go)
[<img src="./_examples/mbarchart.png" alt="barchart" type="image/png" width="45%">](https://github.com/gizak/termui/blob/master/_examples/mbarchart.go) [<img src="./_examples/paragraph.png" alt="paragraph" type="image/png" width="45%">](https://github.com/gizak/termui/blob/master/_examples/par.go)
[<img src="./_examples/sparklines.png" alt="sparklines" type="image/png" width="45%">](https://github.com/gizak/termui/blob/master/_examples/sparklines.go) [<img src="./_examples/sparklines.png" alt="sparklines" type="image/png" width="45%">](https://github.com/gizak/termui/blob/master/_examples/sparklines.go)
[<img src="./_examples/stackedbarchart.png" alt="stackedbarchart" type="image/png" width="45%">](https://github.com/gizak/termui/blob/master/_examples/mbarchart.go)
[<img src="./_examples/table.png" alt="table" type="image/png" width="45%">](https://github.com/gizak/termui/blob/master/_examples/table.go) [<img src="./_examples/table.png" alt="table" type="image/png" width="45%">](https://github.com/gizak/termui/blob/master/_examples/table.go)
## GoDoc ### Examples
[godoc](https://godoc.org/github.com/gizak/termui) Examples can be found in [\_examples](./_examples). Run with `go run _examples/...` or run all of them consecutively with `./scripts/run_examples.py`.
## TODO ## Documentation
- [x] Grid layout - [godoc](https://godoc.org/github.com/gizak/termui) for code documentation
- [x] Event system - [wiki](https://github.com/gizak/termui/wiki) for general information
- [x] Canvas widget
- [x] Refine APIs
- [ ] Focusable widgets
## Changelog ## Uses
- [go-ethereum/monitorcmd](https://github.com/ethereum/go-ethereum/blob/96116758d22ddbff4dbef2050d6b63a7b74502d8/cmd/geth/monitorcmd.go)
## Related Works
- [blessed-contrib](https://github.com/yaronn/blessed-contrib)
- [tui-rs](https://github.com/fdehau/tui-rs)
- [gocui](https://github.com/jroimartin/gocui)
## License ## License