gui

Package gui implements a abstraction layer for Go visual elements.

Definitions:

* Toolkit: the underlying GUI library (MacOS gui, Windows gui, gtk, qt, etc)
* Node: A binary tree of all the underlying widgets

Principles:

* Make code using this package simple to use
* Hide complexity internally here
* Isolate the GUI toolkit
* Widget names should try to match [Wikipedia Graphical widget]
* When in doubt, search upward in the binary tree
* It's ok to guess. Try to do something sensible.

Debian Build

This worked on debian sid (mate-desktop) on 2023/12/03 I didn't record the dependances needed (gtk-dev)

export GO111MODULE="off"
make

Hello World Example

// This creates a simple hello world window
package main

import 	(
	"log"
	"git.wit.org/wit/gui"
)

var window *gui.Node // This is the beginning of the binary tree of widgets

// go will sit here until the window exits
func main() {
	gui.Init()
	gui.Main(helloworld)
}

// This initializes the first window and 2 tabs
func helloworld() {
	gui.Config.Title = "Hello World golang wit/gui Window"
	gui.Config.Width = 640
	gui.Config.Height = 480

	window := gui.NewWindow()
	addTab(window, "A Simple Tab Demo")
	addTab(window, "A Second Tab")
}

func addTab(w *gui.Node, title string) {
	tab := w.NewTab(title)

	group := tab.NewGroup("foo bar")
	group.NewButton("hello", func() {
		log.Println("world")
	})
}

External Toolkits

* andlabs - [https://github.com/andlabs/ui](https://github.com/andlabs/ui)
* gocui - [https://github.com/awesome-gocui/gocui](https://github.com/awesome-gocui/gocui)

The next step is to allow this to work against go-gtk and go-qt.

TODO: Add Fyne, WASM, native macos & windows, android and hopefully also things like libSDL, faiface/pixel, slint

Bugs

"The author's idea of friendly may differ to that of many other people."

-- quote from the minimalistic window manager 'evilwm'

References

Useful links and other external things which might be useful

* [Wikipedia Graphical widget]
* [Github mirror]
* [Federated git pull]
* [GO Style Guide]

Functions

func DebugWidgetWindow

func DebugWidgetWindow(w *Node)

func DebugWindow

func DebugWindow()

Creates a window helpful for debugging this package

func ExampleCatcher

func ExampleCatcher(f func())

func Indent

func Indent(b bool, a ...interface{})

func SetDebug

func SetDebug(s bool)

func SetFlag

func SetFlag(s string, b bool)

func ShowDebugValues

func ShowDebugValues()

func StandardExit

func StandardExit()

The window is destroyed and the application exits TODO: properly exit the plugin since Quit() doesn't do it

func Watchdog

func Watchdog()

This program sits here. If you exit here, the whole thing will os.Exit() TODO: use Ticker

This goroutine can be used like a watchdog timer

Types

type GuiArgs

type GuiArgs struct { ... }

This struct can be used with the go-arg package

Variables

var GuiArg GuiArgs

type Node

type Node struct { ... }

The Node is a binary tree. This is how all GUI elements are stored simply the name and the size of whatever GUI element exists

func New

func New() *Node

There should only be one of these per application This is due to restrictions by being cross platform some toolkit's on some operating systems don't support more than one Keep things simple. Do the default expected thing whenever possible

type Symbol

type Symbol any

Sub Packages

• log

• toolkit

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