Add cancel button, and send code entry

AndroidManifest.xml

@@ -3,8 +3,8 @@
 	xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
 	package="com.github.howeyc.crocgui"
-	android:versionCode="10"
-	android:versionName="1.6.0">
+	android:versionCode="11"
+	android:versionName="1.7.0">
 
     <application android:label="Croc">
 	<activity android:name="org.golang.app.GoNativeActivity"

metadata/en-US/changelogs/11.txt

@@ -0,0 +1,2 @@
+- Add cancel send button
+- User can change/set send code

send.go

@@ -33,11 +33,11 @@ func sendTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 	prog := widget.NewProgressBar()
 	prog.Hide()
 	topline := widget.NewLabel("Pick a file to send")
-	var currentCode string
+	randomCode := utils.GetRandomName()
+	sendEntry := widget.NewEntry()
+	sendEntry.SetText(randomCode)
 	copyCodeButton := widget.NewButtonWithIcon("", theme.ContentCopyIcon(), func() {
-		if currentCode != "" {
-			w.Clipboard().SetContent(currentCode)
-		}
+		w.Clipboard().SetContent(sendEntry.Text)
 	})
 	copyCodeButton.Hide()
 
@@ -70,12 +70,15 @@ func sendTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 				}
 				labelFile := widget.NewLabel(filepath.Base(fpath))
 				newentry := container.NewHBox(labelFile, layout.NewSpacer(), widget.NewButtonWithIcon("", theme.CancelIcon(), func() {
+					// Can only add/remove if not currently attempting a send
+					if !sendEntry.Disabled() {
 						if fe, ok := fileentries[fpath]; ok {
 							boxholder.Remove(fe)
 							os.Remove(fpath)
 							log.Tracef("Removed file from internal cache: %s", fpath)
 							delete(fileentries, fpath)
 						}
+					}
 				}))
 				fileentries[fpath] = newentry
 				boxholder.Add(newentry)
@@ -95,21 +98,46 @@ func sendTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 	}))
 	debugObjects = append(debugObjects, debugBox)
 
-	return container.NewTabItemWithIcon("Send", theme.MailSendIcon(),
-		container.NewVBox(
-			container.NewHBox(topline, layout.NewSpacer(), addFileButton),
-			boxholder,
-			widget.NewButtonWithIcon("Send", theme.MailSendIcon(), func() {
+	cancelchan := make(chan bool)
+	activeButtonHolder := container.NewVBox()
+	var cancelButton, sendButton *widget.Button
+
+	resetSender := func() {
+		prog.Hide()
+		prog.SetValue(0)
+		for _, obj := range activeButtonHolder.Objects {
+			activeButtonHolder.Remove(obj)
+		}
+		activeButtonHolder.Add(sendButton)
+
+		for fpath, fe := range fileentries {
+			boxholder.Remove(fe)
+			os.Remove(fpath)
+			log.Tracef("Removed file from internal cache: %s", fpath)
+			delete(fileentries, fpath)
+		}
+
+		topline.SetText("Pick a file to send")
+		addFileButton.Show()
+		if sendEntry.Text == randomCode {
+			randomCode = utils.GetRandomName()
+			sendEntry.SetText(randomCode)
+		}
+		copyCodeButton.Hide()
+		sendEntry.Enable()
+	}
+
+	sendButton = widget.NewButtonWithIcon("Send", theme.MailSendIcon(), func() {
 		// Only send if files selected
 		if len(fileentries) < 1 {
+			log.Error("no files selected")
 			return
 		}
 
 		addFileButton.Hide()
-				randomName := utils.GetRandomName()
 		sender, err := croc.New(croc.Options{
 			IsSender:       true,
-					SharedSecret:   randomName,
+			SharedSecret:   sendEntry.Text,
 			Debug:          crocDebugMode(),
 			RelayAddress:   a.Preferences().String("relay-address"),
 			RelayPorts:     strings.Split(a.Preferences().String("relay-ports"), ","),
@@ -129,10 +157,15 @@ func sendTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 		log.Trace("croc sender created")
 
 		var filename string
-				status.SetText("Receive Code: " + randomName)
-				currentCode = randomName
+		status.SetText("Receive Code: " + sendEntry.Text)
 		copyCodeButton.Show()
 		prog.Show()
+
+		for _, obj := range activeButtonHolder.Objects {
+			activeButtonHolder.Remove(obj)
+		}
+		activeButtonHolder.Add(cancelButton)
+
 		donechan := make(chan bool)
 		sendnames := make(map[string]int)
 		go func() {
@@ -160,32 +193,40 @@ func sendTabItem(a fyne.App, w fyne.Window) *container.TabItem {
 			for fpath := range fileentries {
 				filepaths = append(filepaths, fpath)
 			}
+			sendEntry.Disable()
 			serr := sender.Send(croc.TransferOptions{
 				PathToFiles: filepaths,
 			})
 			donechan <- true
-					prog.Hide()
-					prog.SetValue(0)
-					for _, fpath := range filepaths {
-						if fe, ok := fileentries[fpath]; ok {
-							boxholder.Remove(fe)
-							os.Remove(fpath)
-							log.Tracef("Removed file from internal cache: %s", fpath)
-							delete(fileentries, fpath)
-						}
-					}
-
-					topline.SetText("Pick a file to send")
-					addFileButton.Show()
 			if serr != nil {
 				log.Errorf("Send failed: %s\n", serr)
 			} else {
 				status.SetText(fmt.Sprintf("Sent file %s", filename))
 			}
-					currentCode = ""
-					copyCodeButton.Hide()
+			resetSender()
 		}()
-			}),
+		go func() {
+			select {
+			case <-cancelchan:
+				donechan <- true
+				status.SetText("Send cancelled.")
+			}
+			resetSender()
+		}()
+	})
+
+	cancelButton = widget.NewButtonWithIcon("Cancel", theme.CancelIcon(), func() {
+		cancelchan <- true
+	})
+
+	activeButtonHolder.Add(sendButton)
+
+	return container.NewTabItemWithIcon("Send", theme.MailSendIcon(),
+		container.NewVBox(
+			container.NewHBox(topline, layout.NewSpacer(), addFileButton),
+			widget.NewForm(&widget.FormItem{Text: "Send Code", Widget: sendEntry}),
+			boxholder,
+			activeButtonHolder,
 			prog,
 			container.NewHBox(status, copyCodeButton),
 			debugBox,