func windowWidget() *gtk.Widget {
	grid, err := gtk.GridNew()
	if err != nil {
		log.Fatal("Unable to create grid:", err)
	}
	grid.SetOrientation(gtk.ORIENTATION_VERTICAL)

	topLabel, err = gtk.LabelNew("Text set by initializer")
	if err != nil {
		log.Fatal("Unable to create label:", err)
	}
	bottomLabel, err = gtk.LabelNew("Text set by initializer")
	if err != nil {
		log.Fatal("Unable to create label:", err)
	}

	grid.Add(topLabel)
	grid.Add(bottomLabel)
	topLabel.SetHExpand(true)
	topLabel.SetVExpand(true)
	bottomLabel.SetHExpand(true)
	bottomLabel.SetVExpand(true)

	return &grid.Container.Widget
}

func (ui *Ui) initDeviceView() *gtk.Box {
	vbox, _ := gtk.BoxNew(gtk.ORIENTATION_VERTICAL, 0)
	ui.deviceBox = vbox

	hbox, _ := gtk.BoxNew(gtk.ORIENTATION_HORIZONTAL, 0)
	vbox.PackStart(hbox, false, true, 20)

	img, _ := gtk.ImageNew()
	hbox.PackStart(img, false, true, 0)
	ui.deviceIcon = img

	nameBox, _ := gtk.BoxNew(gtk.ORIENTATION_VERTICAL, 0)
	hbox.PackStart(nameBox, true, true, 0)

	l, _ := gtk.LabelNew("")
	l.Set("xalign", 0)
	nameBox.PackStart(l, true, true, 0)
	ui.deviceNameLabel = l

	l, _ = gtk.LabelNew("")
	l.Set("xalign", 0)
	nameBox.PackStart(l, true, true, 0)
	ui.deviceStatusLabel = l

	browseBtn, _ := gtk.ButtonNewFromIconName("document-open-symbolic", gtk.ICON_SIZE_BUTTON)
	hbox.PackStart(browseBtn, false, false, 0)
	ui.browseBtn = browseBtn

	browseBtn.Connect("clicked", func() {
		log.Println("Browse device", ui.selectedDevice)
		ui.plugins.Sftp.SendStartBrowsing(ui.selectedDevice)
	})

	pairBtn, _ := gtk.ButtonNew()
	hbox.PackStart(pairBtn, false, false, 5)
	ui.pairBtn = pairBtn

	pairBtn.Connect("clicked", func() {
		log.Println("Pair/unpair device", ui.selectedDevice)

		if ui.selectedDevice.Paired {
			ui.engine.UnpairDevice(ui.selectedDevice)
		} else {
			ui.engine.PairDevice(ui.selectedDevice)
		}
	})

	return vbox
}

// newHTMLPage creates a new HTML page and begins loading the URI in the
// description.
func (d HTMLPageDescription) newHTMLPage() *HTMLPage {
	grid, _ := gtk.GridNew()
	grid.SetOrientation(gtk.ORIENTATION_VERTICAL)
	navbar := NewNavigationBar()
	navbar.SetHExpand(true)
	wv := wk2.NewWebView()
	wv.SetHExpand(true)
	wv.SetVExpand(true)
	title, _ := gtk.LabelNew("New Tab")
	title.SetEllipsize(pango.ELLIPSIZE_END)
	crash, _ := gtk.LabelNew("WebKit crashed :'(")

	grid.SetCanFocus(false)
	navbar.SetCanFocus(false)
	title.SetCanFocus(false)

	grid.Add(navbar)
	navbar.Show()
	grid.Add(wv)
	grid.Show()

	stack, _ := gtk.StackNew()
	stack.SetCanFocus(false)
	stack.AddNamed(grid, "webview")
	stack.AddNamed(crash, "crash")
	stack.SetVisibleChild(crash)

	page := &HTMLPage{
		Stack:      stack,
		title:      "New Tab",
		uri:        string(d),
		titleLabel: title,
		navbar:     navbar,
		wv:         wv,
		crash:      crash,
	}

	page.signals = append(page.signals, page.connectNavbarSignals()...)
	page.signals = append(page.signals, page.connectWebKitSignals()...)

	page.setURI(string(d))

	stack.SetVisibleChild(grid)
	wv.Show()
	page.LoadURI(string(d))

	return page
}

func createTxInfo() *gtk.Widget {
	grid, err := gtk.GridNew()
	if err != nil {
		log.Fatal(err)
	}
	grid.SetOrientation(gtk.ORIENTATION_VERTICAL)

	l, err := gtk.LabelNew("")
	if err != nil {
		log.Fatal(err)
	}
	l.SetMarkup("<b>Recent Transactions</b>")
	l.OverrideFont("sans-serif 10")
	l.SetHAlign(gtk.ALIGN_START)
	grid.Add(l)

	txGrid, err := gtk.GridNew()
	if err != nil {
		log.Fatal(err)
	}
	txGrid.SetOrientation(gtk.ORIENTATION_VERTICAL)
	grid.Add(txGrid)

	Overview.Txs = txGrid

	return &grid.Container.Widget
}

func main() {
	// Initialize GTK without parsing any command line arguments.
	gtk.Init(nil)

	// Create a new toplevel window, set its title, and connect it to the
	// "destroy" signal to exit the GTK main loop when it is destroyed.
	win, err := gtk.WindowNew(gtk.WINDOW_TOPLEVEL)
	if err != nil {
		log.Fatal("Unable to create window:", err)
	}
	win.SetTitle("Simple Example")
	win.Connect("destroy", func() {
		gtk.MainQuit()
	})

	// Create a new label widget to show in the window.
	l, err := gtk.LabelNew("Hello, gotk3!")
	if err != nil {
		log.Fatal("Unable to create label:", err)
	}

	// Add the label to the window.
	win.Add(l)

	// Set the default window size.
	win.SetDefaultSize(800, 600)

	// Recursively show all widgets contained in this window.
	win.ShowAll()

	// Begin executing the GTK main loop.  This blocks until
	// gtk.MainQuit() is run.
	gtk.Main()
}

func createStatusbar() *gtk.Widget {
	grid, err := gtk.GridNew()
	if err != nil {
		log.Fatal(err)
	}

	l, err := gtk.LabelNew("Connecting to daemon...")
	if err != nil {
		log.Fatal("Unable to create label:", err)
	}
	StatusElems.Lab = l
	grid.Add(l)

	p, err := gtk.ProgressBarNew()
	if err != nil {
		log.Fatal("Unable to create progress bar:", err)
	}
	StatusElems.Pb = p
	p.SetSizeRequest(300, -1)
	p.SetFraction(0)
	p.Set("show-text", true)
	p.SetText("")
	p.SetNoShowAll(true)
	grid.Add(p)

	return &grid.Container.Widget
}

func handleTextPreviewMessage(parent *ChatWindow, msg *prot.Message, text, ext string) IMessage {
	from := msg.GetFrom()
	msgType := checkMessageType(from)

	label, err := gtk.LabelNew(text)
	if err != nil {
		goline.LoggerPanicln(err)
	}
	msgId := msg.GetId()
	meta := msg.GetContentMetadata()

	var url string
	if meta["PUBLIC"] == "TRUE" {
		url = meta["DOWNLOAD_URL"]
	} else {
		url = api.LINE_OBJECT_STORAGE_URL + msgId
	}

	return NewDownloadableMessage(parent, msgType, from, msgId, url, ext, label)

}

func (ui *Ui) updateDevicesList() {
	if ui.devicesRows != nil {
		for _, row := range ui.devicesRows {
			row.Destroy()
		}
	}
	ui.devicesRows = map[string]*gtk.ListBoxRow{}

	for _, device := range ui.devices {
		row, _ := gtk.ListBoxRowNew()
		ui.devicesList.Add(row)
		l, _ := gtk.LabelNew(device.Name)
		l.Set("xalign", 0)
		l.SetPadding(20, 15)
		row.Add(l)

		ui.devicesRows[device.Id] = row
	}

	ui.devicesList.ShowAll()
}

// createUnlockDialog creates a dialog to enter a passphrase and unlock
// an encrypted wallet.  If an OK response is received, the passphrase will
// be used to attempt a wallet unlock.
//
// If success is non-nil, the caller may pass in a channel to receive a
// notification for whether the unlock was successful.  If the dialog is
// closed without sending a request to btcwallet and the channel is
// non-nil, the channel is closed.
func createUnlockDialog(reason *UnlockText,
	success chan bool) (*gtk.Dialog, error) {

	dialog, err := gtk.DialogNew()
	if err != nil {
		return nil, err
	}
	dialog.SetTitle(reason.Title)

	dialog.AddButton("_OK", gtk.RESPONSE_OK)
	dialog.AddButton("_Cancel", gtk.RESPONSE_CANCEL)

	grid, err := gtk.GridNew()
	if err != nil {
		return nil, err
	}
	grid.SetHExpand(true)
	grid.SetVExpand(true)
	b, err := dialog.GetContentArea()
	if err != nil {
		return nil, err
	}
	b.Add(grid)
	b.SetHExpand(true)
	b.SetVExpand(true)

	lbl, err := gtk.LabelNew(reason.Message)
	if err != nil {
		return nil, err
	}
	grid.Attach(lbl, 0, 0, 2, 1)

	lbl, err = gtk.LabelNew("Passphrase")
	if err != nil {
		return nil, err
	}
	grid.Attach(lbl, 0, 1, 1, 1)

	passphrase, err := gtk.EntryNew()
	if err != nil {
		return nil, err
	}
	passphrase.SetVisibility(false)
	passphrase.SetHExpand(true)
	passphrase.SetVExpand(true)
	passphrase.Connect("activate", func() {
		dialog.Emit("response", gtk.RESPONSE_OK, nil)
	})
	grid.Attach(passphrase, 1, 1, 1, 1)

	lbl, err = gtk.LabelNew("Timeout (s)")
	if err != nil {
		return nil, err
	}
	grid.Attach(lbl, 0, 2, 1, 1)

	timeout, err := gtk.SpinButtonNewWithRange(0, float64(1<<64-1), 1)
	if err != nil {
		return nil, err
	}
	timeout.SetValue(60)
	timeout.Connect("activate", func() {
		dialog.Emit("response", gtk.RESPONSE_OK, nil)
	})
	grid.Attach(timeout, 1, 2, 1, 1)

	dialog.SetTransientFor(mainWindow)
	dialog.SetPosition(gtk.WIN_POS_CENTER_ON_PARENT)
	dialog.ShowAll()

	dialog.Connect("response", func(_ *glib.Object, rt gtk.ResponseType) {
		switch rt {
		case gtk.RESPONSE_OK:
			pStr, err := passphrase.GetText()
			if err != nil {
				log.Print(err)
				return
			}

			timeoutSecs := timeout.GetValueAsInt()

			go func() {
				triggers.unlockWallet <- &UnlockParams{
					pStr,
					int64(timeoutSecs),
				}

				if ok := <-triggerReplies.unlockSuccessful; ok {
					if success != nil {
						success <- true
					}
					glib.IdleAdd(func() {
//.........这里部分代码省略.........

func createSendCoins() *gtk.Widget {
	grid, err := gtk.GridNew()
	if err != nil {
		log.Fatal(err)
	}
	grid.SetOrientation(gtk.ORIENTATION_VERTICAL)

	sw, err := gtk.ScrolledWindowNew(nil, nil)
	if err != nil {
		log.Fatal(err)
	}
	sw.SetPolicy(gtk.POLICY_NEVER, gtk.POLICY_AUTOMATIC)
	sw.SetHExpand(true)
	sw.SetVExpand(true)
	grid.Add(sw)

	entriesGrid, err := gtk.GridNew()
	if err != nil {
		log.Fatal(err)
	}
	SendCoins.EntryGrid = entriesGrid
	entriesGrid.SetOrientation(gtk.ORIENTATION_VERTICAL)
	sw.Add(entriesGrid)
	insertSendEntries(entriesGrid)

	bot, err := gtk.GridNew()
	if err != nil {
		log.Fatal(err)
	}

	btn, err := gtk.ButtonNewWithLabel("Add Recipient")
	if err != nil {
		log.Fatal(err)
	}
	btn.SetSizeRequest(150, -1)
	btn.Connect("clicked", func() {
		insertSendEntries(entriesGrid)
	})
	bot.Add(btn)

	l, err := gtk.LabelNew("Balance: ")
	if err != nil {
		log.Fatal(err)
	}
	bot.Add(l)
	SendCoins.Balance = l

	submitBtn, err := gtk.ButtonNewWithLabel("Send")
	if err != nil {
		log.Fatal(err)
	}
	submitBtn.SetSizeRequest(150, -1)
	submitBtn.SetHAlign(gtk.ALIGN_END)
	submitBtn.SetHExpand(true)
	submitBtn.SetSensitive(false)
	submitBtn.Connect("clicked", func() {
		sendTo := make(map[string]float64)
		for e := recipients.Front(); e != nil; e = e.Next() {
			r := e.Value.(*recipient)

			// Get and validate address
			addr, err := r.payTo.GetText()
			if err != nil {
				d := errorDialog("Error getting payment address", err.Error())
				d.Run()
				d.Destroy()
				return
			}
			_, net, err := btcutil.DecodeAddress(addr)
			if err != nil {
				d := errorDialog("Invalid payment address",
					fmt.Sprintf("'%v' is not a valid payment address", addr))
				d.Run()
				d.Destroy()
				return
			}
			switch net {
			case btcwire.MainNet:
				if !cfg.MainNet {
					d := errorDialog("Invalid payment address",
						fmt.Sprintf("'%v' is a mainnet address", addr))
					d.Run()
					d.Destroy()
					return
				}
			case btcwire.TestNet3:
				if cfg.MainNet {
					d := errorDialog("Invalid payment address",
						fmt.Sprintf("'%v' is a testnet address", addr))
					d.Run()
					d.Destroy()
					return
				}
			}

			// Get amount and units and convert to float64
			amt := r.amount.GetValue()
			// Combo box isn't used right now.
			/*
				switch r.combo.GetActive() {
//.........这里部分代码省略.........

// CreateTutorialDialog opens a tutorial dialog explaining usage for a
// first-time user.  If appWindow is non-nil, it will be used as the
// parent window of the dialog.  If nil, the tutorial dialog will open as
// a top-level window and a new application main window will be created
// and opened after the final tutorial message is shown.
func CreateTutorialDialog(appWindow *gtk.Window) (*gtk.Dialog, error) {
	d, err := gtk.DialogNew()
	if err != nil {
		return nil, err
	}
	d.SetTitle("btcgui First Start Tutorial")
	box, err := d.GetContentArea()
	if err != nil {
		return nil, err
	}
	grid, err := gtk.GridNew()
	if err != nil {
		return nil, err
	}
	grid.SetOrientation(gtk.ORIENTATION_VERTICAL)
	box.Add(grid)

	d.SetDefaultGeometry(500, 100)

	if appWindow != nil {
		d.SetTransientFor(appWindow)
		d.SetPosition(gtk.WIN_POS_CENTER_ON_PARENT)
	} else {
		d.Connect("destroy", func() {
			go StartMainApplication()
		})
		d.SetPosition(gtk.WIN_POS_CENTER)
	}

	// Add a notebook and tab for each dialog message.
	nb, err := gtk.NotebookNew()
	if err != nil {
		return nil, err
	}

	// Because the labels added below will wrap and their final minimum
	// heights and widths will be absurdly large, first give a size request
	// and show the notebook (allocating space for the requested size).
	// This will make text wrapping labels size nicely inside the notebook.
	nb.SetSizeRequest(500, 100)
	nb.Show()

	// Create messages and append each in a notebook page.
	for _, msg := range dialogMessages {
		lbl, err := gtk.LabelNew("")
		if err != nil {
			return nil, err
		}
		lbl.SetMarkup(msg)
		lbl.SetLineWrap(true)
		lbl.Show()
		lbl.SetAlignment(0, 0)
		nb.AppendPage(lbl, nil)
	}
	nb.SetShowTabs(false)
	grid.Add(nb)

	prevPage, err := d.AddButton("_Previous", gtk.RESPONSE_NONE)
	if err != nil {
		return nil, err
	}
	prevPage.SetSensitive(false)
	nextPage, err := d.AddButton("_Next", gtk.RESPONSE_NONE)
	if err != nil {
		return nil, err
	}
	prevPage.Connect("clicked", func() {
		nb.PrevPage()
		pagen := nb.GetCurrentPage()
		if pagen == 0 {
			prevPage.SetSensitive(false)
		}
		nextPage.SetSensitive(true)
	})
	nextPage.Connect("clicked", func() {
		nb.NextPage()
		pagen := nb.GetCurrentPage()
		if pagen == len(dialogMessages)-1 {
			nextPage.SetSensitive(false)
		}
		prevPage.SetSensitive(true)
	})
	_, err = d.AddButton("_Close", gtk.RESPONSE_CLOSE)
	if err != nil {
		return nil, err
	}
	d.Connect("response", func(_ *glib.Object, rt gtk.ResponseType) {
		if rt == gtk.RESPONSE_CLOSE {
			// Using w.Close() would be nice but it needs GTK 3.10.
			d.Hide()
			d.Destroy()
		}
	})

	return d, nil
//.........这里部分代码省略.........

func createTxFeeDialog() (*gtk.Dialog, error) {
	dialog, err := gtk.DialogNew()
	if err != nil {
		return nil, err
	}
	dialog.SetTitle("Set Transaction Fee")

	dialog.AddButton("_OK", gtk.RESPONSE_OK)
	dialog.AddButton("_Cancel", gtk.RESPONSE_CANCEL)

	grid, err := gtk.GridNew()
	if err != nil {
		return nil, err
	}
	grid.SetHExpand(true)
	grid.SetVExpand(true)
	grid.SetOrientation(gtk.ORIENTATION_VERTICAL)
	b, err := dialog.GetContentArea()
	if err != nil {
		return nil, err
	}
	b.Add(grid)
	b.SetHExpand(true)
	b.SetVExpand(true)

	l, err := gtk.LabelNew(txFeeMessage)
	if err != nil {
		return nil, err
	}
	l.SetHExpand(true)
	l.SetVExpand(true)
	l.SetHAlign(gtk.ALIGN_START)
	grid.Add(l)

	spinb, err := gtk.SpinButtonNewWithRange(0, 21000000, 0.00000001)
	if err != nil {
		return nil, err
	}
	grid.Add(spinb)

	dialog.SetTransientFor(mainWindow)
	dialog.SetPosition(gtk.WIN_POS_CENTER_ON_PARENT)
	dialog.ShowAll()

	dialog.Connect("response", func(_ *glib.Object, rt gtk.ResponseType) {
		switch rt {
		case gtk.RESPONSE_OK:
			fee := spinb.GetValue()
			go func() {
				triggers.setTxFee <- fee

				if err := <-triggerReplies.setTxFeeErr; err != nil {
					d := errorDialog("Error setting transaction fee:",
						err.Error())
					d.Run()
					d.Destroy()
				} else {
					glib.IdleAdd(func() {
						dialog.Destroy()
					})
				}
			}()

		case gtk.RESPONSE_CANCEL:
			dialog.Destroy()
		}
	})

	return dialog, nil
}

func windowWidget() *gtk.Widget {
	grid, err := gtk.GridNew()
	if err != nil {
		log.Fatal("Unable to create grid:", err)
	}
	grid.SetOrientation(gtk.ORIENTATION_VERTICAL)

	entry, err := gtk.EntryNew()
	if err != nil {
		log.Fatal("Unable to create entry:", err)
	}
	s, _ := entry.GetText()
	label, err := gtk.LabelNew(s)
	if err != nil {
		log.Fatal("Unable to create label:", err)
	}
	grid.Add(entry)
	entry.SetHExpand(true)
	grid.AttachNextTo(label, entry, gtk.POS_RIGHT, 1, 1)
	label.SetHExpand(true)

	// Connects this entry's "activate" signal (which is emitted whenever
	// Enter is pressed when the Entry is activated) to an anonymous
	// function that gets the current text of the entry and sets the text of
	// the label beside it with it.  Unlike with native GTK callbacks,
	// (*glib.Object).Connect() supports closures.  In this example, this is
	// demonstrated by using the label variable.  Without closures, a
	// pointer to the label would need to be passed in as user data
	// (demonstrated in the next example).
	entry.Connect("activate", func() {
		s, _ := entry.GetText()
		label.SetText(s)
	})

	sb, err := gtk.SpinButtonNewWithRange(0, 1, 0.1)
	if err != nil {
		log.Fatal("Unable to create spin button:", err)
	}
	pb, err := gtk.ProgressBarNew()
	if err != nil {
		log.Fatal("Unable to create progress bar:", err)
	}
	grid.Add(sb)
	sb.SetHExpand(true)
	grid.AttachNextTo(pb, sb, gtk.POS_RIGHT, 1, 1)
	label.SetHExpand(true)

	// Pass in a ProgressBar and the target SpinButton as user data rather
	// than using the sb and pb variables scoped to the anonymous func.
	// This can be useful when passing in a closure that has already been
	// generated, but when you still wish to connect the callback with some
	// variables only visible in this scope.
	sb.Connect("value-changed", func(obj *glib.Object, pb *gtk.ProgressBar) {
		sb := &gtk.SpinButton{gtk.Entry{gtk.Widget{
			glib.InitiallyUnowned{obj}}}}
		pb.SetFraction(sb.GetValue() / 1)
	}, pb)

	label, err = gtk.LabelNew("")
	if err != nil {
		log.Fatal("Unable to create label:", err)
	}
	s = "Hyperlink to <a href=\"https://www.cyphertite.com/\">Cyphertite</a> for your clicking pleasure"
	label.SetMarkup(s)
	grid.AttachNextTo(label, sb, gtk.POS_BOTTOM, 2, 1)

	// Some GTK callback functions require arguments, such as the
	// 'gchar *uri' argument of GtkLabel's "activate-link" signal.  To use
	// these arguments, pass in a *glib.CallbackContext as an argument, and
	// access by calling (*glib.CallbackContext).Arg(n) for the nth
	// argument.
	label.Connect("activate-link", func(_ *glib.Object, uri string) {
		fmt.Println("you clicked a link to:", uri)
	})

	return &grid.Container.Widget
}

func windowWidget() *gtk.Widget {
	grid, err := gtk.GridNew()
	if err != nil {
		log.Fatal("Unable to create grid:", err)
	}
	grid.SetOrientation(gtk.ORIENTATION_VERTICAL)

	// Just as a demonstration, we create and destroy a Label without ever
	// adding it to a container.  In native GTK, this would result in a
	// memory leak, since gtk_widget_destroy() will not deallocate any
	// memory when passed a GtkWidget with a floating reference.
	//
	// gotk3 handles this situation by always sinking floating references
	// of any struct type embedding a glib.InitiallyUnowned, and by setting
	// a finalizer to unreference the object when Go has lost scope of the
	// variable.  Due to this design, widgets may be allocated freely
	// without worrying about handling memory incorrectly.
	//
	// The following code is not entirely useful (except to demonstrate
	// this point), but it is also not "incorrect" as the C equivalent
	// would be.
	unused, err := gtk.LabelNew("This label is never used")
	if err != nil {
		// Calling Destroy() is also unnecessary in this case.  The
		// memory will still be freed with or without calling it.
		unused.Destroy()
	}

	sw, err := gtk.ScrolledWindowNew(nil, nil)
	if err != nil {
		log.Fatal("Unable to create scrolled window:", err)
	}

	grid.Attach(sw, 0, 0, 2, 1)
	sw.SetHExpand(true)
	sw.SetVExpand(true)

	labelsGrid, err := gtk.GridNew()
	if err != nil {
		log.Fatal("Unable to create grid:", err)
	}
	labelsGrid.SetOrientation(gtk.ORIENTATION_VERTICAL)

	sw.Add(labelsGrid)
	labelsGrid.SetHExpand(true)

	insertBtn, err := gtk.ButtonNewWithLabel("Add a label")
	if err != nil {
		log.Fatal("Unable to create button:", err)
	}
	removeBtn, err := gtk.ButtonNewWithLabel("Remove a label")
	if err != nil {
		log.Fatal("Unable to create button:", err)
	}

	nLabels := 1
	insertBtn.Connect("clicked", func() {
		var s string
		if nLabels == 1 {
			s = fmt.Sprintf("Inserted %d label.", nLabels)
		} else {
			s = fmt.Sprintf("Inserted %d labels.", nLabels)
		}
		label, err := gtk.LabelNew(s)
		if err != nil {
			log.Print("Unable to create label:", err)
			return
		}

		labelList.PushBack(label)
		labelsGrid.Add(label)
		label.SetHExpand(true)
		labelsGrid.ShowAll()

		nLabels++
	})

	removeBtn.Connect("clicked", func() {
		e := labelList.Front()
		if e == nil {
			log.Print("Nothing to remove")
			return
		}
		lab, ok := labelList.Remove(e).(*gtk.Label)
		if !ok {
			log.Print("Element to remove is not a *gtk.Label")
			return
		}
		// (*Widget).Destroy() breaks this label's reference with all
		// other objects (in this case, the Grid container it was added
		// to).
		lab.Destroy()

		// At this point, only Go retains a reference to the GtkLabel.
		// When the lab variable goes out of scope when this function
		// returns, at the next garbage collector run, a finalizer will
		// be run to perform the final unreference and free the widget.
	})

	grid.Attach(insertBtn, 0, 1, 1, 1)
//.........这里部分代码省略.........

func createNewWalletDialog() (*gtk.Dialog, error) {
	dialog, err := gtk.DialogNew()
	if err != nil {
		return nil, err
	}
	dialog.SetTitle("New wallet")

	dialog.AddButton("_OK", gtk.RESPONSE_OK)

	dialog.SetDefaultGeometry(500, 100)

	grid, err := gtk.GridNew()
	if err != nil {
		return nil, err
	}
	grid.SetHExpand(true)
	grid.SetVExpand(true)

	b, err := dialog.GetContentArea()
	if err != nil {
		return nil, err
	}
	b.Add(grid)

	// Because the label will wrap and the final minimum heights
	// and widths will be absurdly large, first give a size request and
	// show the grid (allocating space for the requested size).  This will
	// make text wrapping labels size nicely inside the grid.
	grid.SetSizeRequest(500, 100)
	grid.Show()

	l, err := gtk.LabelNew("")
	if err != nil {
		return nil, err
	}
	l.SetLineWrap(true)
	l.SetMarkup(newWalletMessage)
	l.SetAlignment(0, 0)
	grid.Attach(l, 0, 0, 2, 1)

	b.SetHExpand(true)
	b.SetVExpand(true)

	l, err = gtk.LabelNew("Enter passphrase:")
	if err != nil {
		return nil, err
	}
	l.SetAlignment(1.0, 0.5)
	grid.Attach(l, 0, 1, 1, 1)

	passphrase, err := gtk.EntryNew()
	if err != nil {
		return nil, err
	}
	passphrase.SetVisibility(false)
	passphrase.SetHExpand(true)
	passphrase.Connect("activate", func() {
		dialog.Emit("response", gtk.RESPONSE_OK, nil)
	})
	grid.Attach(passphrase, 1, 1, 1, 1)

	l, err = gtk.LabelNew("Confirm passphrase:")
	if err != nil {
		return nil, err
	}
	l.SetAlignment(1.0, 0.5)
	grid.Attach(l, 0, 2, 1, 1)

	repeated, err := gtk.EntryNew()
	if err != nil {
		return nil, err
	}
	repeated.SetVisibility(false)
	repeated.SetVAlign(gtk.ALIGN_START)
	repeated.Connect("activate", func() {
		dialog.Emit("response", gtk.RESPONSE_OK, nil)
	})
	grid.Attach(repeated, 1, 2, 1, 1)

	showEntryText, err := gtk.CheckButtonNewWithLabel("Show passphrase")
	if err != nil {
		return nil, err
	}
	showEntryText.Connect("toggled", func() {
		active := showEntryText.GetActive()
		passphrase.SetVisibility(active)
		repeated.SetVisibility(active)
	})
	grid.Attach(showEntryText, 1, 3, 2, 1)

	dialog.SetTransientFor(mainWindow)
	dialog.SetPosition(gtk.WIN_POS_CENTER_ON_PARENT)
	dialog.ShowAll()

	dialog.Connect("response", func(_ *glib.Object, rt gtk.ResponseType) {
		switch rt {
		case gtk.RESPONSE_OK:
			pStr, err := passphrase.GetText()
			if err != nil {
				log.Print(err)
//.........这里部分代码省略.........

func createTxLabel(attr *TxAttributes) (*gtk.Widget, error) {
	grid, err := gtk.GridNew()
	if err != nil {
		return nil, err
	}
	grid.SetHExpand(true)

	var amtLabel *gtk.Label
	var description *gtk.Label
	var icon *gtk.Image
	switch attr.Direction {
	case Send:
		amtLabel, err = gtk.LabelNew(amountStr(attr.Amount))
		if err != nil {
			return nil, err
		}

		description, err = gtk.LabelNew(fmt.Sprintf("Send (%s)", attr.Address))
		if err != nil {
			return nil, err
		}

		icon, err = gtk.ImageNewFromIconName("go-next",
			gtk.ICON_SIZE_SMALL_TOOLBAR)
		if err != nil {
			return nil, err
		}

	case Recv:
		amtLabel, err = gtk.LabelNew(amountStr(attr.Amount))
		if err != nil {
			return nil, err
		}

		description, err = gtk.LabelNew(fmt.Sprintf("Receive (%s)", attr.Address))
		if err != nil {
			return nil, err
		}

		icon, err = gtk.ImageNewFromIconName("go-previous",
			gtk.ICON_SIZE_SMALL_TOOLBAR)
		if err != nil {
			return nil, err
		}
	}
	grid.Attach(icon, 0, 0, 2, 2)
	grid.Attach(description, 2, 1, 2, 1)
	description.SetHAlign(gtk.ALIGN_START)
	grid.Attach(amtLabel, 3, 0, 1, 1)
	amtLabel.SetHAlign(gtk.ALIGN_END)
	amtLabel.SetHExpand(true)

	date, err := gtk.LabelNew(attr.Date.Format("Jan 2, 2006 at 3:04 PM"))
	if err != nil {
		return nil, err
	}
	grid.Attach(date, 2, 0, 1, 1)
	date.SetHAlign(gtk.ALIGN_START)

	grid.SetHAlign(gtk.ALIGN_FILL)

	return &grid.Container.Widget, nil
}

func createEncryptionDialog() (*gtk.Dialog, error) {
	dialog, err := gtk.DialogNew()
	if err != nil {
		return nil, err
	}
	dialog.SetTitle("Encrypt wallet")

	dialog.AddButton("_OK", gtk.RESPONSE_OK)
	dialog.AddButton("_Cancel", gtk.RESPONSE_CANCEL)

	grid, err := gtk.GridNew()
	if err != nil {
		return nil, err
	}
	grid.SetHExpand(true)
	grid.SetVExpand(true)
	b, err := dialog.GetContentArea()
	if err != nil {
		return nil, err
	}
	b.Add(grid)
	b.SetHExpand(true)
	b.SetVExpand(true)

	l, err := gtk.LabelNew("")
	if err != nil {
		return nil, err
	}
	l.SetMarkup(encryptMessage)
	l.SetHExpand(true)
	l.SetVExpand(true)
	l.SetHAlign(gtk.ALIGN_START)
	grid.Attach(l, 0, 0, 2, 1)

	l, err = gtk.LabelNew("New passphrase")
	if err != nil {
		return nil, err
	}
	grid.Attach(l, 0, 1, 1, 1)

	passphrase, err := gtk.EntryNew()
	if err != nil {
		return nil, err
	}
	passphrase.SetVisibility(false)
	passphrase.SetHExpand(true)
	passphrase.Connect("activate", func() {
		dialog.Emit("response", gtk.RESPONSE_OK, nil)
	})
	grid.Attach(passphrase, 1, 1, 1, 1)

	l, err = gtk.LabelNew("Repeat new passphrase")
	if err != nil {
		return nil, err
	}
	l.SetVExpand(true)
	l.SetVAlign(gtk.ALIGN_START)
	grid.Attach(l, 0, 2, 1, 1)

	repeated, err := gtk.EntryNew()
	if err != nil {
		return nil, err
	}
	repeated.SetVisibility(false)
	repeated.SetVExpand(true)
	repeated.SetVAlign(gtk.ALIGN_START)
	repeated.Connect("activate", func() {
		dialog.Emit("response", gtk.RESPONSE_OK, nil)
	})
	grid.Attach(repeated, 1, 2, 1, 1)

	dialog.SetTransientFor(mainWindow)
	dialog.SetPosition(gtk.WIN_POS_CENTER_ON_PARENT)
	dialog.ShowAll()

	dialog.Connect("response", func(_ *glib.Object, rt gtk.ResponseType) {
		switch rt {
		case gtk.RESPONSE_OK:
			pStr, err := passphrase.GetText()
			if err != nil {
				log.Print(err)
				return
			}
			rStr, err := repeated.GetText()
			if err != nil {
				log.Print(err)
				return
			}
			if pStr == rStr {
				// use the passphrase, encrypt wallet...
				dialog.Destroy()
			} else {
				msg := "The supplied passphrases do not match."
				mDialog := gtk.MessageDialogNew(dialog, 0,
					gtk.MESSAGE_ERROR, gtk.BUTTONS_OK, msg)
				mDialog.SetTitle("Wallet encryption failed")
				mDialog.Run()
				mDialog.Destroy()
			}
		case gtk.RESPONSE_CANCEL:
//.........这里部分代码省略.........

func main() {
	gtk.Init(nil)

	win, err := gtk.WindowNew(gtk.WINDOW_TOPLEVEL)
	if err != nil {
		log.Fatal("Unable to create window:", err)
	}
	win.SetTitle("Grid Example")
	win.Connect("destroy", func() {
		gtk.MainQuit()
	})

	// Create a new grid widget to arrange child widgets
	grid, err := gtk.GridNew()
	if err != nil {
		log.Fatal("Unable to create grid:", err)
	}

	// gtk.Grid embeds an Orientable struct to simulate the GtkOrientable
	// GInterface.  Set the orientation from the default horizontal to
	// vertical.
	grid.SetOrientation(gtk.ORIENTATION_VERTICAL)

	// Create some widgets to put in the grid.
	lab, err := gtk.LabelNew("Just a label")
	if err != nil {
		log.Fatal("Unable to create label:", err)
	}

	btn, err := gtk.ButtonNewWithLabel("Button with label")
	if err != nil {
		log.Fatal("Unable to create button:", err)
	}

	entry, err := gtk.EntryNew()
	if err != nil {
		log.Fatal("Unable to create entry:", err)
	}

	spnBtn, err := gtk.SpinButtonNewWithRange(0.0, 1.0, 0.001)
	if err != nil {
		log.Fatal("Unable to create spin button:", err)
	}

	nb, err := gtk.NotebookNew()
	if err != nil {
		log.Fatal("Unable to create notebook:", err)
	}

	// Calling (*gtk.Container).Add() with a gtk.Grid will add widgets next
	// to each other, in the order they were added, to the right side of the
	// last added widget when the grid is in a horizontal orientation, and
	// at the bottom of the last added widget if the grid is in a vertial
	// orientation.  Using a grid in this manner works similar to a gtk.Box,
	// but unlike gtk.Box, a gtk.Grid will respect its child widget's expand
	// and margin properties.
	grid.Add(btn)
	grid.Add(lab)
	grid.Add(entry)
	grid.Add(spnBtn)

	// Widgets may also be added by calling (*gtk.Grid).Attach() to specify
	// where to place the widget in the grid, and optionally how many rows
	// and columns to span over.
	//
	// Additional rows and columns are automatically added to the grid as
	// necessary when new widgets are added with (*gtk.Container).Add(), or,
	// as shown in this case, using (*gtk.Grid).Attach().
	//
	// In this case, a notebook is added beside the widgets inserted above.
	// The notebook widget is inserted with a left position of 1, a top
	// position of 1 (starting at the same vertical position as the button),
	// a width of 1 column, and a height of 2 rows (spanning down to the
	// same vertical position as the entry).
	//
	// This example also demonstrates how not every area of the grid must
	// contain a widget.  In particular, the area to the right of the label
	// and the right of spin button have contain no widgets.
	grid.Attach(nb, 1, 1, 1, 2)
	nb.SetHExpand(true)
	nb.SetVExpand(true)

	// Add a child widget and tab label to the notebook so it renders.
	nbChild, err := gtk.LabelNew("Notebook content")
	if err != nil {
		log.Fatal("Unable to create button:", err)
	}
	nbTab, err := gtk.LabelNew("Tab label")
	if err != nil {
		log.Fatal("Unable to create label:", err)
	}
	nb.AppendPage(nbChild, nbTab)

	// Add the grid to the window, and show all widgets.
	win.Add(grid)
	win.ShowAll()

	gtk.Main()
}

func createRecipient(rmFn func(*glib.Object, *recipient)) *recipient {
	ret := new(recipient)
	ret.n = recipients.Len()

	grid, err := gtk.GridNew()
	if err != nil {
		log.Fatal(err)
	}
	ret.Widget = grid.Container.Widget

	l, err := gtk.LabelNew("Pay To:")
	if err != nil {
		log.Fatal(err)
	}
	grid.Attach(l, 0, 0, 1, 1)
	l, err = gtk.LabelNew("Amount:")
	if err != nil {
		log.Fatal(err)
	}
	grid.Attach(l, 0, 1, 1, 1)

	payTo, err := gtk.EntryNew()
	if err != nil {
		log.Fatal(err)
	}
	payTo.SetHExpand(true)
	ret.payTo = payTo
	grid.Attach(payTo, 1, 0, 1, 1)

	remove, err := gtk.ButtonNew()
	if err != nil {
		log.Fatal(err)
	}
	img, err := gtk.ImageNewFromIconName("_Delete", gtk.ICON_SIZE_MENU)
	if err != nil {
		log.Fatal(err)
	}
	remove.SetImage(img)
	remove.SetTooltipText("Remove this recipient")
	remove.Connect("clicked", rmFn, ret)
	grid.Attach(remove, 2, 0, 1, 1)

	// TODO(jrick): Label doesn't do anything currently, so don't add
	// to gui.
	/*
		l, err = gtk.LabelNew("Label:")
		if err != nil {
			log.Fatal(err)
		}
		grid.Attach(l, 0, 1, 1, 1)
		label, err := gtk.EntryNew()
		if err != nil {
			log.Fatal(err)
		}
		label.SetHExpand(true)
		ret.label = label
		grid.Attach(label, 1, 1, 2, 1)
	*/

	amounts, err := gtk.GridNew()
	if err != nil {
		log.Fatal(err)
	}
	amount, err := gtk.SpinButtonNewWithRange(0, 21000000, 0.00000001)
	if err != nil {
		log.Fatal(err)
	}
	amount.SetHAlign(gtk.ALIGN_START)
	ret.amount = amount
	amounts.Add(amount)

	ls, err := gtk.ListStoreNew(glib.TYPE_STRING)
	if err != nil {
		log.Fatal(err)
	}
	iter := ls.Append()
	choices := []string{"BTC", "mBTC", "μBTC"}
	s := make([]interface{}, len(choices))
	for i, v := range choices {
		s[i] = v
	}
	if err := ls.Set(iter, []int{0}, []interface{}{"BTC"}); err != nil {
		fmt.Println(err)
	}
	iter = ls.Append()
	if err := ls.Set(iter, []int{0}, []interface{}{"mBTC"}); err != nil {
		fmt.Println(err)
	}
	iter = ls.Append()
	if err := ls.Set(iter, []int{0}, []interface{}{"μBTC"}); err != nil {
		fmt.Println(err)
	}

	// TODO(jrick): add back when this works.
	/*
		combo, err := gtk.ComboBoxNewWithModel(ls)
		if err != nil {
			log.Fatal(err)
		}
		cell, err := gtk.CellRendererTextNew()
//.........这里部分代码省略.........

// CreateWindow creates the toplevel window for the GUI.
func CreateWindow() (*gtk.Window, error) {
	var err error
	mainWindow, err = gtk.WindowNew(gtk.WINDOW_TOPLEVEL)
	if err != nil {
		return nil, err
	}
	mainWindow.SetTitle("btcgui")
	mainWindow.Connect("destroy", func() {
		gtk.MainQuit()
	})

	grid, err := gtk.GridNew()
	if err != nil {
		return nil, err
	}
	grid.SetOrientation(gtk.ORIENTATION_VERTICAL)

	grid.Add(createMenuBar())

	notebook, err := gtk.NotebookNew()
	if err != nil {
		return nil, err
	}
	notebook.SetHExpand(true)
	notebook.SetVExpand(true)
	grid.Add(notebook)

	l, err := gtk.LabelNew("Overview")
	if err != nil {
		return nil, err
	}
	notebook.AppendPage(createOverview(), l)

	l, err = gtk.LabelNew("Send Coins")
	if err != nil {
		return nil, err
	}
	notebook.AppendPage(createSendCoins(), l)

	l, err = gtk.LabelNew("Receive Coins")
	if err != nil {
		return nil, err
	}
	notebook.AppendPage(createRecvCoins(), l)

	l, err = gtk.LabelNew("Transactions")
	if err != nil {
		log.Fatal(err)
	}
	notebook.AppendPage(createTransactions(), l)

	// TODO(jrick): Add back when address book is implemented.
	/*
		l, err = gtk.LabelNew("Address Book")
		if err != nil {
			log.Fatal(err)
		}
		notebook.AppendPage(createAddrBook(), l)
	*/

	grid.Add(createStatusbar())

	mainWindow.Add(grid)

	mainWindow.SetDefaultGeometry(800, 600)

	return mainWindow, nil
}