app

Package to build MacOS and Web apps using Go, HTML and CSS.

Table of Contents

• Install
• Hello world
• Drivers
• Documentation
• Examples

Install

# MacOS 10.12 and above.
xcode-select --install

# Get package.
go get -u -v github.com/murlokswarm/app/...

Hello world

Main

func main() {
	app.Run(&mac.Driver{
		OnRun: func() {
			newWindow()
		},

		OnReopen: func(hasVisibleWindow bool) {
			if !hasVisibleWindow {
				newWindow()
			}
		},
	})
}

func newWindow() {
	app.NewWindow(app.WindowConfig{
		Title:           "hello world",
		TitlebarHidden:  true,
		Width:           1280,
		Height:          768,
		BackgroundColor: "#21252b",
		DefaultURL:      "/Hello",
	})
}

app.Run starts the app. It takes an app.Driver as argument. Here we use the MacOS driver implementation. See other drivers.

When creating the window, we set the DefaultURL to our Hello component struct name: /Hello. It will make the component loaded when the window is displayed.

Component

func init() {
	app.Import(&Hello{})
}

type Hello struct {
	Name string
}

func (h *Hello) Render() string {
	return `
<div class="Hello">
	<h1>
		Hello
		{{if .Name}}
			{{.Name}}
		{{else}}
			world
		{{end}}!
	</h1>
	<input value="{{.Name}}" placeholder="Say something..." onchange="Name" autofocus>
</div>
	`
}

Components are structs that implement the app.Component interface.

Render method returns a string that contains HTML5. It can be templated following Go standard template syntax:

• text/template
• html/template

HTML events like onchange are mapped to the targetted component field or method. Here, onchange is mapped to the field Name.

CSS

/* [PACKAGE PATH]/resources/css/hello.css */

.Hello {
    /* Your CSS */
}

Because, we want a stylish Hello world, we define the CSS that will give us some cool look.

CSS files are located in [PACKAGE PATH]/resources/css/ directory. All .css files within that directory will be included.

See the full example.

Drivers

A driver contains specific code that allows the app package to work on multiple platforms.

• MacOS
• Web - run on the top of gopherjs

Other drivers will come in the futur.

Documentation

• GoDoc
• v1 to v2 migration guide

Examples

From package:

• hello
• nav
• menu
• dock
• drag and drop
• test

From community:

• grocid/mistlur - use v1
• grocid/passdesktop - use v1