Merge branch 'release/0.5.15'

15 files changed, 416 insertions, 310 deletions

diff --git a/ethereal/assets/debugger/debugger.qml b/ethereal/assets/debugger/debugger.qml
index 31e0eb781..3e653882c 100644
--- a/ethereal/assets/debugger/debugger.qml
+++ b/ethereal/assets/debugger/debugger.qml
@@ -10,9 +10,9 @@ ApplicationWindow {
 	visible: false
 	title: "IceCREAM"
 	minimumWidth: 1280
-	minimumHeight: 900
+	minimumHeight: 700
 	width: 1290
-	height: 900
+	height: 700
 
 	property alias codeText: codeEditor.text
 	property alias dataText: rawDataField.text
@@ -42,7 +42,7 @@ ApplicationWindow {
 		TableView {
 			id: asmTableView
 			width: 200
-			TableViewColumn{ role: "value" ; title: "" ; width: 100 }
+			TableViewColumn{ role: "value" ; title: "" ; width: 200 }
 			model: asmModel
 		}
 
@@ -56,7 +56,7 @@ ApplicationWindow {
 
 				Rectangle {
 					color: "#00000000"
-					height: 500
+					height: 330
 					anchors.left: parent.left
 					anchors.right: parent.right
 
@@ -208,6 +208,12 @@ ApplicationWindow {
 				}
 				text: "Next"
 			}
+			CheckBox {
+				id: breakEachLine
+				objectName: "breakEachLine"
+				text: "Break each instruction"
+				checked: true
+			}
 		}
 	}
 
diff --git a/ethereal/assets/ext/ethereum.js b/ethereal/assets/ext/ethereum.js
index c58fe24c2..de6fb0255 100644
--- a/ethereal/assets/ext/ethereum.js
+++ b/ethereal/assets/ext/ethereum.js
@@ -58,6 +58,9 @@ window.eth = {
 	getBalanceAt: function(address, cb) {
 		postData({call: "getBalance", args: [address]}, cb);
 	},
+	getTransactionsFor: function(address, cb) {
+		postData({call: "getTransactionsFor", args: [address]}, cb);
+	},
 
 	getSecretToAddress: function(sec, cb) {
 		postData({call: "getSecretToAddress", args: [sec]}, cb);
diff --git a/ethereal/assets/qml/QmlApp.qml b/ethereal/assets/qml/QmlApp.qml
new file mode 100644
index 000000000..f5c503f4c
--- /dev/null
+++ b/ethereal/assets/qml/QmlApp.qml
@@ -0,0 +1,22 @@
+import QtQuick 2.0
+import QtQuick.Controls 1.0;
+import QtQuick.Layouts 1.0;
+import Ethereum 1.0
+
+ApplicationWindow {
+	minimumWidth: 500
+	maximumWidth: 500
+	maximumHeight: 400
+	minimumHeight: 400
+
+	function onNewBlockCb(block) {
+		console.log("Please overwrite onNewBlock(block):", block)
+	}
+	function onObjectChangeCb(stateObject) {
+		console.log("Please overwrite onObjectChangeCb(object)", stateObject)
+	}
+	function onStorageChangeCb(storageObject) {
+		var ev = ["storage", storageObject.stateAddress, storageObject.address].join(":");
+		console.log("Please overwrite onStorageChangeCb(object)", ev)
+	}
+}
diff --git a/ethereal/assets/qml/test_app.qml b/ethereal/assets/qml/test_app.qml
index aace4e881..c69587839 100644
--- a/ethereal/assets/qml/test_app.qml
+++ b/ethereal/assets/qml/test_app.qml
@@ -3,33 +3,68 @@ import QtQuick.Controls 1.0;
 import QtQuick.Layouts 1.0;
 import Ethereum 1.0
 
-ApplicationWindow {
-	minimumWidth: 500
-	maximumWidth: 500
-	maximumHeight: 100
-	minimumHeight: 100
+QmlApp {
+	minimumWidth: 350
+	maximumWidth: 350
+	maximumHeight: 80
+	minimumHeight: 80
 
-	title: "Ethereum Dice"
+	title: "Generic Coin"
 
-	TextField {
-		id: textField
-		anchors.verticalCenter: parent.verticalCenter
-		anchors.horizontalCenter: parent.horizontalCenter
-		placeholderText: "Amount"
+	property string contractAddr: "f299f6c74515620e4c4cd8fe3d205b5c4f2e25c8"
+	property string addr: "2ef47100e0787b915105fd5e3f4ff6752079d5cb"
+
+	Component.onCompleted: {
+		eth.watch(contractAddr, addr)
+		eth.watch(addr, contractAddr)
+		setAmount()
+	}
+
+	function onStorageChangeCb(storageObject) {
+		setAmount()
 	}
-	Label {
-		id: txHash
-		anchors.bottom: textField.top
-		anchors.bottomMargin: 5
-		anchors.horizontalCenter: parent.horizontalCenter
+
+	function setAmount(){
+		var state = eth.getStateObject(contractAddr)
+		var storage = state.getStorage(addr)
+		amountLabel.text = storage
 	}
-	Button {
-		anchors.top: textField.bottom
-		anchors.horizontalCenter: parent.horizontalCenter
-		anchors.topMargin: 5
-		text: "Place bet"
-		onClicked: {
-			txHash.text = eth.createTx("e6716f9544a56c530d868e4bfbacb172315bdead", textField.text)
+	Column {
+		spacing: 5
+		Row {
+			spacing: 20
+			Label {
+				id: genLabel
+				text: "Generic coin balance:"
+			}
+			Label {
+				id: amountLabel
+			}
+		}
+		Row {
+			spacing: 20
+			TextField {
+				id: address
+				placeholderText: "Address"
+			}
+			TextField {
+				id: amount
+				placeholderText: "Amount"
+			}
+		}
+		Button {
+			text: "Send coins"
+			onClicked: {
+				var privKey = eth.getKey().privateKey
+				if(privKey){
+					var result = eth.transact(privKey, contractAddr, 0,"100000","250", "0x" + address.text + "\n" + amount.text)
+					resultTx.text = result.hash
+				}
+			}
+		}
+		Label {
+			id: resultTx
 		}
 	}
+
 }
diff --git a/ethereal/assets/qml/wallet.qml b/ethereal/assets/qml/wallet.qml
index a7c03f6d1..84f8fd5cf 100644
--- a/ethereal/assets/qml/wallet.qml
+++ b/ethereal/assets/qml/wallet.qml
@@ -319,7 +319,7 @@ ApplicationWindow {
 
 					Slider {
 						id: logLevelSlider
-						value: 1
+						value: eth.getLogLevelInt()
 						anchors {
 							right: parent.right
 							top: parent.top
@@ -332,7 +332,7 @@ ApplicationWindow {
 						}
 
 						orientation: Qt.Vertical
-						maximumValue: 3
+						maximumValue: 5
 						stepSize: 1
 
 						onValueChanged: {
@@ -372,7 +372,15 @@ ApplicationWindow {
 		onAccepted: {
 			//ui.open(openAppDialog.fileUrl.toString())
 			//ui.openHtml(Qt.resolvedUrl(ui.assetPath("test.html")))
-			ui.openHtml(openAppDialog.fileUrl.toString())
+			var path = openAppDialog.fileUrl.toString()
+			console.log(path)
+			var ext = path.split('.').pop()
+			console.log(ext)
+			if(ext == "html" || ext == "htm") {
+				ui.openHtml(path)
+			}else if(ext == "qml"){
+				ui.openQml(path)
+			}
 		}
 	}
 
diff --git a/ethereal/assets/qml/webapp.qml b/ethereal/assets/qml/webapp.qml
index 4a5a1293a..63927f0eb 100644
--- a/ethereal/assets/qml/webapp.qml
+++ b/ethereal/assets/qml/webapp.qml
@@ -103,6 +103,12 @@ ApplicationWindow {
 					      postData(data._seed,stateObject)
 
 						break
+					case "getTransactionsFor":
+					      require(1);
+					      var txs = eth.getTransactionsFor(data.args[0], true)
+					      postData(data._seed, txs)
+
+					      break
 					case "getBalance":
 						require(1);
 
diff --git a/ethereal/config.go b/ethereal/config.go
deleted file mode 100644
index 2315d1435..000000000
--- a/ethereal/config.go
+++ /dev/null
@@ -1,43 +0,0 @@
-package main
-
-import (
-	"flag"
-)
-
-var Identifier string
-
-//var StartMining bool
-var StartRpc bool
-var RpcPort int
-var UseUPnP bool
-var OutboundPort string
-var ShowGenesis bool
-var AddPeer string
-var MaxPeer int
-var GenAddr bool
-var UseSeed bool
-var ImportKey string
-var ExportKey bool
-var AssetPath string
-
-var Datadir string
-
-func Init() {
-	flag.StringVar(&Identifier, "id", "", "Custom client identifier")
-	flag.StringVar(&OutboundPort, "port", "30303", "listening port")
-	flag.BoolVar(&UseUPnP, "upnp", false, "enable UPnP support")
-	flag.IntVar(&MaxPeer, "maxpeer", 10, "maximum desired peers")
-	flag.IntVar(&RpcPort, "rpcport", 8080, "port to start json-rpc server on")
-	flag.BoolVar(&StartRpc, "rpc", false, "start rpc server")
-	flag.StringVar(&AssetPath, "asset_path", "", "absolute path to GUI assets directory")
-
-	flag.BoolVar(&ShowGenesis, "genesis", false, "prints genesis header and exits")
-	flag.BoolVar(&UseSeed, "seed", true, "seed peers")
-	flag.BoolVar(&GenAddr, "genaddr", false, "create a new priv/pub key")
-	flag.BoolVar(&ExportKey, "export", false, "export private key")
-	flag.StringVar(&ImportKey, "import", "", "imports the given private key (hex)")
-
-	flag.StringVar(&Datadir, "datadir", ".ethereal", "specifies the datadir to use. Takes precedence over config file.")
-
-	flag.Parse()
-}
diff --git a/ethereal/ethereum.go b/ethereal/ethereum.go
deleted file mode 100644
index 0db1fa4cd..000000000
--- a/ethereal/ethereum.go
+++ /dev/null
@@ -1,142 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"github.com/ethereum/eth-go"
-	"github.com/ethereum/eth-go/ethutil"
-	"github.com/ethereum/go-ethereum/ethereal/ui"
-	"github.com/ethereum/go-ethereum/utils"
-	"github.com/go-qml/qml"
-	"github.com/rakyll/globalconf"
-	"log"
-	"os"
-	"os/signal"
-	"path"
-	"runtime"
-)
-
-const Debug = true
-
-// Register interrupt handlers so we can stop the ethereum
-func RegisterInterupts(s *eth.Ethereum) {
-	// Buffered chan of one is enough
-	c := make(chan os.Signal, 1)
-	// Notify about interrupts for now
-	signal.Notify(c, os.Interrupt)
-	go func() {
-		for sig := range c {
-			fmt.Printf("Shutting down (%v) ... \n", sig)
-
-			s.Stop()
-		}
-	}()
-}
-
-func main() {
-	Init()
-
-	qml.Init(nil)
-
-	runtime.GOMAXPROCS(runtime.NumCPU())
-
-	g, err := globalconf.NewWithOptions(&globalconf.Options{
-		Filename: path.Join(ethutil.ApplicationFolder(Datadir), "conf.ini"),
-	})
-	if err != nil {
-		fmt.Println(err)
-	} else {
-		g.ParseAll()
-	}
-	ethutil.ReadConfig(Datadir, ethutil.LogFile|ethutil.LogStd, g, Identifier)
-
-	// Instantiated a eth stack
-	ethereum, err := eth.New(eth.CapDefault, UseUPnP)
-	if err != nil {
-		log.Println("eth start err:", err)
-		return
-	}
-	ethereum.Port = OutboundPort
-
-	if GenAddr {
-		fmt.Println("This action overwrites your old private key. Are you sure? (y/n)")
-
-		var r string
-		fmt.Scanln(&r)
-		for ; ; fmt.Scanln(&r) {
-			if r == "n" || r == "y" {
-				break
-			} else {
-				fmt.Printf("Yes or no?", r)
-			}
-		}
-
-		if r == "y" {
-			utils.CreateKeyPair(true)
-		}
-		os.Exit(0)
-	} else {
-		if len(ImportKey) > 0 {
-			fmt.Println("This action overwrites your old private key. Are you sure? (y/n)")
-			var r string
-			fmt.Scanln(&r)
-			for ; ; fmt.Scanln(&r) {
-				if r == "n" || r == "y" {
-					break
-				} else {
-					fmt.Printf("Yes or no?", r)
-				}
-			}
-
-			if r == "y" {
-				utils.ImportPrivateKey(ImportKey)
-				os.Exit(0)
-			}
-		}
-	}
-
-	if ExportKey {
-		keyPair := ethutil.GetKeyRing().Get(0)
-		fmt.Printf(`
-Generating new address and keypair.
-Please keep your keys somewhere save.
-
-++++++++++++++++ KeyRing +++++++++++++++++++
-addr: %x
-prvk: %x
-pubk: %x
-++++++++++++++++++++++++++++++++++++++++++++
-save these words so you can restore your account later: %s
-`, keyPair.Address(), keyPair.PrivateKey, keyPair.PublicKey)
-
-		os.Exit(0)
-	}
-
-	if ShowGenesis {
-		fmt.Println(ethereum.BlockChain().Genesis())
-		os.Exit(0)
-	}
-
-	/*
-		if StartMining {
-			utils.DoMining(ethereum)
-		}
-	*/
-
-	if StartRpc {
-		utils.DoRpc(ethereum, RpcPort)
-	}
-
-	log.Printf("Starting Ethereum GUI v%s\n", ethutil.Config.Ver)
-
-	// Set the max peers
-	ethereum.MaxPeers = MaxPeer
-
-	gui := ethui.New(ethereum)
-
-	ethereum.Start(UseSeed)
-
-	gui.Start(AssetPath)
-
-	// Wait for shutdown
-	ethereum.WaitForShutdown()
-}
diff --git a/ethereal/flags.go b/ethereal/flags.go
new file mode 100644
index 000000000..9bed38d9f
--- /dev/null
+++ b/ethereal/flags.go
@@ -0,0 +1,95 @@
+package main
+
+import (
+	"bitbucket.org/kardianos/osext"
+	"flag"
+	"fmt"
+	"github.com/ethereum/eth-go/ethlog"
+	"os"
+	"os/user"
+	"path"
+	"path/filepath"
+	"runtime"
+)
+
+var Identifier string
+var StartRpc bool
+var RpcPort int
+var UseUPnP bool
+var OutboundPort string
+var ShowGenesis bool
+var AddPeer string
+var MaxPeer int
+var GenAddr bool
+var UseSeed bool
+var ImportKey string
+var ExportKey bool
+var NonInteractive bool
+var Datadir string
+var LogFile string
+var ConfigFile string
+var DebugFile string
+var LogLevel int
+
+// flags specific to gui client
+var AssetPath string
+
+func defaultAssetPath() string {
+	var assetPath 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") {
+		assetPath = path.Join(pwd, "assets")
+	} else {
+		switch runtime.GOOS {
+		case "darwin":
+			// Get Binary Directory
+			exedir, _ := osext.ExecutableFolder()
+			assetPath = filepath.Join(exedir, "../Resources")
+		case "linux":
+			assetPath = "/usr/share/ethereal"
+		case "window":
+			fallthrough
+		default:
+			assetPath = "."
+		}
+	}
+	return assetPath
+}
+
+func defaultDataDir() string {
+	usr, _ := user.Current()
+	return path.Join(usr.HomeDir, ".ethereal")
+}
+
+var defaultConfigFile = path.Join(defaultDataDir(), "conf.ini")
+
+func Init() {
+	flag.Usage = func() {
+		fmt.Fprintf(os.Stderr, "%s [options] [filename]:\noptions precedence: default < config file < environment variables < command line\n", os.Args[0])
+		flag.PrintDefaults()
+	}
+
+	flag.StringVar(&Identifier, "id", "", "Custom client identifier")
+	flag.StringVar(&OutboundPort, "port", "30303", "listening port")
+	flag.BoolVar(&UseUPnP, "upnp", false, "enable UPnP support")
+	flag.IntVar(&MaxPeer, "maxpeer", 10, "maximum desired peers")
+	flag.IntVar(&RpcPort, "rpcport", 8080, "port to start json-rpc server on")
+	flag.BoolVar(&StartRpc, "rpc", false, "start rpc server")
+	flag.BoolVar(&NonInteractive, "y", false, "non-interactive mode (say yes to confirmations)")
+	flag.BoolVar(&UseSeed, "seed", true, "seed peers")
+	flag.BoolVar(&GenAddr, "genaddr", false, "create a new priv/pub key")
+	flag.BoolVar(&ExportKey, "export", false, "export private key")
+	flag.StringVar(&LogFile, "logfile", "", "log file (defaults to standard output)")
+	flag.StringVar(&ImportKey, "import", "", "imports the given private key (hex)")
+	flag.StringVar(&Datadir, "datadir", defaultDataDir(), "specifies the datadir to use")
+	flag.StringVar(&ConfigFile, "conf", defaultConfigFile, "config file")
+	flag.StringVar(&DebugFile, "debug", "", "debug file (no debugging if not set)")
+	flag.IntVar(&LogLevel, "loglevel", int(ethlog.InfoLevel), "loglevel: 0-5: silent,error,warn,info,debug,debug detail)")
+
+	flag.StringVar(&AssetPath, "asset_path", defaultAssetPath(), "absolute path to GUI assets directory")
+
+	flag.Parse()
+}
diff --git a/ethereal/main.go b/ethereal/main.go
new file mode 100644
index 000000000..799b50e4b
--- /dev/null
+++ b/ethereal/main.go
@@ -0,0 +1,61 @@
+package main
+
+import (
+	"github.com/ethereum/eth-go/ethlog"
+	"github.com/ethereum/go-ethereum/ethereal/ui"
+	"github.com/ethereum/go-ethereum/utils"
+	"github.com/go-qml/qml"
+	"os"
+	"runtime"
+)
+
+func main() {
+	runtime.GOMAXPROCS(runtime.NumCPU())
+
+	qml.Init(nil)
+
+	var interrupted = false
+	utils.RegisterInterrupt(func(os.Signal) {
+		interrupted = true
+	})
+
+	utils.HandleInterrupt()
+
+	// precedence: code-internal flag default < config file < environment variables < command line
+	Init() // parsing command line
+	utils.InitConfig(ConfigFile, Datadir, Identifier, "ETH")
+
+	utils.InitDataDir(Datadir)
+
+	utils.InitLogging(Datadir, LogFile, LogLevel, DebugFile)
+
+	ethereum := utils.NewEthereum(UseUPnP, OutboundPort, MaxPeer)
+
+	// create, import, export keys
+	utils.KeyTasks(GenAddr, ImportKey, ExportKey, NonInteractive)
+
+	if ShowGenesis {
+		utils.ShowGenesis(ethereum)
+	}
+
+	if StartRpc {
+		utils.StartRpc(ethereum, RpcPort)
+	}
+
+	gui := ethui.New(ethereum, LogLevel)
+
+	utils.RegisterInterrupt(func(os.Signal) {
+		gui.Stop()
+	})
+	utils.StartEthereum(ethereum, UseSeed)
+	// gui blocks the main thread
+	gui.Start(AssetPath)
+	// we need to run the interrupt callbacks in case gui is closed
+	// this skips if we got here by actual interrupt stopping the GUI
+	if !interrupted {
+		utils.RunInterruptCallbacks(os.Interrupt)
+	}
+	// this blocks the thread
+	ethereum.WaitForShutdown()
+	ethlog.Flush()
+}
diff --git a/ethereal/ui/debugger.go b/ethereal/ui/debugger.go
index 9d60c7587..85dd45563 100644
--- a/ethereal/ui/debugger.go
+++ b/ethereal/ui/debugger.go
@@ -26,7 +26,7 @@ func NewDebuggerWindow(lib *UiLib) *DebuggerWindow {
 	}
 
 	win := component.CreateWindow(nil)
-	db := &Debugger{win, make(chan bool), make(chan bool), true, false}
+	db := &Debugger{win, make(chan bool), make(chan bool), true, false, true}
 
 	return &DebuggerWindow{engine: engine, win: win, lib: lib, Db: db}
 }
@@ -59,6 +59,7 @@ func (self *DebuggerWindow) Debug(valueStr, gasStr, gasPriceStr, scriptStr, data
 	if !self.Db.done {
 		self.Db.Q <- true
 	}
+	self.Db.breakOnInstr = self.win.Root().ObjectByName("breakEachLine").Bool("checked")
 
 	defer func() {
 		if r := recover(); r != nil {
@@ -95,16 +96,20 @@ func (self *DebuggerWindow) Debug(valueStr, gasStr, gasPriceStr, scriptStr, data
 		self.win.Root().Call("setAsm", str)
 	}
 
-	gas := ethutil.Big(gasStr)
-	gasPrice := ethutil.Big(gasPriceStr)
-	// Contract addr as test address
-	keyPair := ethutil.GetKeyRing().Get(0)
-	callerTx := ethchain.NewContractCreationTx(ethutil.Big(valueStr), gas, gasPrice, script)
+	var (
+		gas      = ethutil.Big(gasStr)
+		gasPrice = ethutil.Big(gasPriceStr)
+		value    = ethutil.Big(valueStr)
+		// Contract addr as test address
+		keyPair  = ethutil.GetKeyRing().Get(0)
+		callerTx = ethchain.NewContractCreationTx(ethutil.Big(valueStr), gas, gasPrice, script)
+	)
 	callerTx.Sign(keyPair.PrivateKey)
 
 	state := self.lib.eth.BlockChain().CurrentBlock.State()
 	account := self.lib.eth.StateManager().TransState().GetAccount(keyPair.Address())
 	contract := ethchain.MakeContract(callerTx, state)
+	contract.Amount = value
 	callerClosure := ethchain.NewClosure(account, contract, script, state, gas, gasPrice)
 
 	block := self.lib.eth.BlockChain().CurrentBlock
@@ -164,6 +169,7 @@ type Debugger struct {
 	N               chan bool
 	Q               chan bool
 	done, interrupt bool
+	breakOnInstr    bool
 }
 
 type storeVal struct {
@@ -190,16 +196,18 @@ func (d *Debugger) halting(pc int, op ethchain.OpCode, mem *ethchain.Memory, sta
 		d.win.Root().Call("setStorage", storeVal{fmt.Sprintf("% x", key), fmt.Sprintf("% x", node.Str())})
 	})
 
-out:
-	for {
-		select {
-		case <-d.N:
-			break out
-		case <-d.Q:
-			d.interrupt = true
-			d.clearBuffers()
-
-			return false
+	if d.breakOnInstr {
+	out:
+		for {
+			select {
+			case <-d.N:
+				break out
+			case <-d.Q:
+				d.interrupt = true
+				d.clearBuffers()
+
+				return false
+			}
 		}
 	}
 
diff --git a/ethereal/ui/gui.go b/ethereal/ui/gui.go
index 1037ba5ac..f861236aa 100644
--- a/ethereal/ui/gui.go
+++ b/ethereal/ui/gui.go
@@ -6,6 +6,7 @@ import (
 	"github.com/ethereum/eth-go"
 	"github.com/ethereum/eth-go/ethchain"
 	"github.com/ethereum/eth-go/ethdb"
+	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethpub"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/ethereum/go-ethereum/utils"
@@ -15,6 +16,8 @@ import (
 	"time"
 )
 
+var logger = ethlog.NewLogger("GUI")
+
 type Gui struct {
 	// The main application window
 	win *qml.Window
@@ -32,11 +35,13 @@ type Gui struct {
 
 	addr []byte
 
-	pub *ethpub.PEthereum
+	pub      *ethpub.PEthereum
+	logLevel ethlog.LogLevel
+	open     bool
 }
 
 // Create GUI, but doesn't start it
-func New(ethereum *eth.Ethereum) *Gui {
+func New(ethereum *eth.Ethereum, logLevel int) *Gui {
 	lib := &EthLib{stateManager: ethereum.StateManager(), blockChain: ethereum.BlockChain(), txPool: ethereum.TxPool()}
 	db, err := ethdb.NewLDBDatabase("tx_database")
 	if err != nil {
@@ -52,11 +57,11 @@ func New(ethereum *eth.Ethereum) *Gui {
 
 	pub := ethpub.NewPEthereum(ethereum)
 
-	return &Gui{eth: ethereum, lib: lib, txDb: db, addr: addr, pub: pub}
+	return &Gui{eth: ethereum, lib: lib, txDb: db, addr: addr, pub: pub, logLevel: ethlog.LogLevel(logLevel), open: false}
 }
 
 func (gui *Gui) Start(assetPath string) {
-	const version = "0.5.0 RC14"
+	const version = "0.5.0 RC15"
 
 	defer gui.txDb.Close()
 
@@ -86,25 +91,39 @@ func (gui *Gui) Start(assetPath string) {
 
 	var win *qml.Window
 	var err error
+	var addlog = false
 	if len(data) == 0 {
 		win, err = gui.showKeyImport(context)
 	} else {
 		win, err = gui.showWallet(context)
-
-		ethutil.Config.Log.AddLogSystem(gui)
+		addlog = true
 	}
 	if err != nil {
-		ethutil.Config.Log.Infoln("FATAL: asset not found: you can set an alternative asset path on on the command line using option 'asset_path'", err)
+		logger.Errorln("asset not found: you can set an alternative asset path on the command line using option 'asset_path'", err)
 
 		panic(err)
 	}
 
-	ethutil.Config.Log.Infoln("[GUI] Starting GUI")
-
+	logger.Infoln("Starting GUI")
+	gui.open = true
 	win.Show()
+	// only add the gui logger after window is shown otherwise slider wont be shown
+	if addlog {
+		ethlog.AddLogSystem(gui)
+	}
 	win.Wait()
+	// need to silence gui logger after window closed otherwise logsystem hangs
+	gui.SetLogLevel(ethlog.Silence)
+	gui.open = false
+}
 
-	gui.eth.Stop()
+func (gui *Gui) Stop() {
+	if gui.open {
+		gui.SetLogLevel(ethlog.Silence)
+		gui.open = false
+		gui.win.Hide()
+	}
+	logger.Infoln("Stopped")
 }
 
 func (gui *Gui) ToggleMining() {
@@ -154,10 +173,6 @@ func (gui *Gui) createWindow(comp qml.Object) *qml.Window {
 	gui.win = win
 	gui.uiLib.win = win
 
-	db := &Debugger{gui.win, make(chan bool), make(chan bool), true, false}
-	gui.lib.Db = db
-	gui.uiLib.Db = db
-
 	return gui.win
 }
 func (gui *Gui) setInitialBlockChain() {
@@ -315,22 +330,6 @@ func (gui *Gui) setPeerInfo() {
 	}
 }
 
-// Logging functions that log directly to the GUI interface
-func (gui *Gui) Println(v ...interface{}) {
-	str := strings.TrimRight(fmt.Sprintln(v...), "\n")
-	lines := strings.Split(str, "\n")
-	for _, line := range lines {
-		gui.win.Root().Call("addLog", line)
-	}
-}
-
-func (gui *Gui) Printf(format string, v ...interface{}) {
-	str := strings.TrimRight(fmt.Sprintf(format, v...), "\n")
-	lines := strings.Split(str, "\n")
-	for _, line := range lines {
-		gui.win.Root().Call("addLog", line)
-	}
-}
 func (gui *Gui) RegisterName(name string) {
 	keyPair := ethutil.GetKeyRing().Get(0)
 	name = fmt.Sprintf("\"%s\"\n1", name)
@@ -357,6 +356,34 @@ func (gui *Gui) ClientId() string {
 	return ethutil.Config.Identifier
 }
 
-func (gui *Gui) SetLogLevel(level int) {
-	ethutil.Config.Log.SetLevel(level)
+// functions that allow Gui to implement interface ethlog.LogSystem
+func (gui *Gui) SetLogLevel(level ethlog.LogLevel) {
+	gui.logLevel = level
+}
+
+func (gui *Gui) GetLogLevel() ethlog.LogLevel {
+	return gui.logLevel
+}
+
+// this extra function needed to give int typecast value to gui widget
+// that sets initial loglevel to default
+func (gui *Gui) GetLogLevelInt() int {
+	return int(gui.logLevel)
+}
+
+func (gui *Gui) Println(v ...interface{}) {
+	gui.printLog(fmt.Sprintln(v...))
+}
+
+func (gui *Gui) Printf(format string, v ...interface{}) {
+	gui.printLog(fmt.Sprintf(format, v...))
+}
+
+// Print function that logs directly to the GUI
+func (gui *Gui) printLog(s string) {
+	str := strings.TrimRight(s, "\n")
+	lines := strings.Split(str, "\n")
+	for _, line := range lines {
+		gui.win.Root().Call("addLog", line)
+	}
 }
diff --git a/ethereal/ui/html_container.go b/ethereal/ui/html_container.go
index 3867c0353..d7dc80af7 100644
--- a/ethereal/ui/html_container.go
+++ b/ethereal/ui/html_container.go
@@ -96,11 +96,11 @@ func (app *HtmlApplication) NewWatcher(quitChan chan bool) {
 				app.watcher.Close()
 				break out
 			case <-app.watcher.Event:
-				//ethutil.Config.Log.Debugln("Got event:", ev)
+				//logger.Debugln("Got event:", ev)
 				app.webView.Call("reload")
 			case err := <-app.watcher.Error:
 				// TODO: Do something here
-				ethutil.Config.Log.Infoln("Watcher error:", err)
+				logger.Infoln("Watcher error:", err)
 			}
 		}
 	}()
diff --git a/ethereal/ui/qml_app.go b/ethereal/ui/qml_app.go
new file mode 100644
index 000000000..39ab7f922
--- /dev/null
+++ b/ethereal/ui/qml_app.go
@@ -0,0 +1,59 @@
+package ethui
+
+import (
+	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethpub"
+	"github.com/ethereum/eth-go/ethutil"
+	"github.com/go-qml/qml"
+)
+
+type QmlApplication struct {
+	win    *qml.Window
+	engine *qml.Engine
+	lib    *UiLib
+	path   string
+}
+
+func NewQmlApplication(path string, lib *UiLib) *QmlApplication {
+	engine := qml.NewEngine()
+	return &QmlApplication{engine: engine, path: path, lib: lib}
+}
+
+func (app *QmlApplication) Create() error {
+	component, err := app.engine.LoadFile(app.path)
+	if err != nil {
+		logger.Warnln(err)
+	}
+	app.win = component.CreateWindow(nil)
+
+	return nil
+}
+
+func (app *QmlApplication) Destroy() {
+	app.engine.Destroy()
+}
+
+func (app *QmlApplication) NewWatcher(quitChan chan bool) {
+}
+
+// Events
+func (app *QmlApplication) NewBlock(block *ethchain.Block) {
+	pblock := &ethpub.PBlock{Number: int(block.BlockInfo().Number), Hash: ethutil.Hex(block.Hash())}
+	app.win.Call("onNewBlockCb", pblock)
+}
+
+func (app *QmlApplication) ObjectChanged(stateObject *ethchain.StateObject) {
+	app.win.Call("onObjectChangeCb", ethpub.NewPStateObject(stateObject))
+}
+
+func (app *QmlApplication) StorageChanged(storageObject *ethchain.StorageState) {
+	app.win.Call("onStorageChangeCb", ethpub.NewPStorageState(storageObject))
+}
+
+// Getters
+func (app *QmlApplication) Engine() *qml.Engine {
+	return app.engine
+}
+func (app *QmlApplication) Window() *qml.Window {
+	return app.win
+}
diff --git a/ethereal/ui/ui_lib.go b/ethereal/ui/ui_lib.go
index 791d4fe09..ddc955176 100644
--- a/ethereal/ui/ui_lib.go
+++ b/ethereal/ui/ui_lib.go
@@ -1,14 +1,10 @@
 package ethui
 
 import (
-	"bitbucket.org/kardianos/osext"
 	"github.com/ethereum/eth-go"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/go-qml/qml"
-	"os"
 	"path"
-	"path/filepath"
-	"runtime"
 )
 
 type memAddr struct {
@@ -29,24 +25,14 @@ type UiLib struct {
 }
 
 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)
+func (ui *UiLib) OpenQml(path string) {
+	container := NewQmlApplication(path[7:], ui)
+	app := NewExtApplication(container, ui)
 
-	go func() {
-		win.Show()
-		win.Wait()
-	}()
+	go app.run()
 }
 
 func (ui *UiLib) OpenHtml(path string) {
@@ -59,7 +45,7 @@ func (ui *UiLib) OpenHtml(path string) {
 func (ui *UiLib) Muted(content string) {
 	component, err := ui.engine.LoadFile(ui.AssetPath("qml/muted.qml"))
 	if err != nil {
-		ethutil.Config.Log.Debugln(err)
+		logger.Debugln(err)
 
 		return
 	}
@@ -88,6 +74,7 @@ func (ui *UiLib) ConnectToPeer(addr string) {
 func (ui *UiLib) AssetPath(p string) string {
 	return path.Join(ui.assetPath, p)
 }
+
 func (self *UiLib) StartDbWithContractAndData(contractHash, data string) {
 	dbWindow := NewDebuggerWindow(self)
 	object := self.eth.StateManager().CurrentState().GetStateObject(ethutil.FromHex(contractHash))
@@ -111,29 +98,3 @@ func (self *UiLib) StartDebugger() {
 
 	dbWindow.Show()
 }
-
-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
-}