plugeth/ethereal/ui/ui_lib.go

package ethui

import (
	"bitbucket.org/kardianos/osext"
	"github.com/ethereum/eth-go"
	"github.com/ethereum/eth-go/ethutil"
	"github.com/niemeyer/qml"
	"os"
	"path"
	"path/filepath"
	"runtime"
)

// UI Library that has some basic functionality exposed
type UiLib struct {
	engine    *qml.Engine
	eth       *eth.Ethereum
	connected bool
	assetPath string
}

func NewUiLib(engine *qml.Engine, eth *eth.Ethereum, assetPath string) *UiLib {
	if assetPath == "" {
		assetPath = DefaultAssetPath()
	}
	return &UiLib{engine: engine, eth: eth, assetPath: assetPath}
}

// Opens a QML file (external application)
func (ui *UiLib) Open(path string) {
	component, err := ui.engine.LoadFile(path[7:])
	if err != nil {
		ethutil.Config.Log.Debugln(err)
	}
	win := component.CreateWindow(nil)

	go func() {
		win.Show()
		win.Wait()
	}()
}

func (ui *UiLib) Connect(button qml.Object) {
	if !ui.connected {
		ui.eth.Start()
		ui.connected = true
		button.Set("enabled", false)
	}
}

func (ui *UiLib) ConnectToPeer(addr string) {
	ui.eth.ConnectToPeer(addr)
}

func (ui *UiLib) AssetPath(p string) string {
	return path.Join(ui.assetPath, p)
}

func DefaultAssetPath() string {
	var base string

	// If the current working directory is the go-ethereum dir
	// assume a debug build and use the source directory as
	// asset directory.
	pwd, _ := os.Getwd()
	if pwd == path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "ethereal") {
		base = path.Join(pwd, "assets")
	} else {
		switch runtime.GOOS {
		case "darwin":
			// Get Binary Directory
			exedir, _ := osext.ExecutableFolder()
			base = filepath.Join(exedir, "../Resources")
		case "linux":
			base = "/usr/share/ethereal"
		case "window":
			fallthrough
		default:
			base = "."
		}
	}

	return base
}