Add QR Code to get adress dialog (#3186)

app/bundle/src/main/scala/org/bitcoins/bundle/gui/BundleGUI.scala

@@ -72,6 +72,7 @@ object BundleGUI extends WalletGUI with JFXApp {
     scene = guiScene
     icons.add(GUIUtil.logo)
   }
+  taskRunner
 
   def changeToWalletGUIScene(): Unit = {
     Platform.runLater(

app/gui/src/main/scala/org/bitcoins/gui/GUI.scala

@@ -95,4 +95,5 @@ object GUI extends WalletGUI with JFXApp {
   }
 
   fetchStartingData()
+  taskRunner
 }

app/gui/src/main/scala/org/bitcoins/gui/WalletGUIModel.scala

@@ -9,16 +9,18 @@ import org.bitcoins.core.wallet.fee.FeeUnit
 import org.bitcoins.gui.dialog._
 import org.bitcoins.gui.util.GUIUtil
 import scalafx.application.Platform
-import scalafx.beans.property.{ObjectProperty, StringProperty}
+import scalafx.beans.property._
 import scalafx.scene.control.Alert
 import scalafx.scene.control.Alert.AlertType
 import scalafx.stage.Window
 
 import scala.concurrent.duration.DurationInt
+import scala.concurrent.{Await, Promise}
 import scala.util.{Failure, Success, Try}
 
 class WalletGUIModel()(implicit system: ActorSystem) {
   var taskRunner: TaskRunner = _
+  import system.dispatcher
 
   // Sadly, it is a Java "pattern" to pass null into
   // constructors to signal that you want some default
@@ -35,7 +37,6 @@ class WalletGUIModel()(implicit system: ActorSystem) {
   }
 
   def startWalletInfoScheduler(): Cancellable = {
-    import system.dispatcher
     system.scheduler.scheduleAtFixedRate(0.seconds, 10.seconds)(
       UpdateWalletInfoRunnable)
   }
@@ -49,19 +50,22 @@ class WalletGUIModel()(implicit system: ActorSystem) {
   }
 
   def onGetNewAddress(): Unit = {
-    val address = StringProperty("")
+    val addressP = Promise[String]()
 
     taskRunner.run(
       caption = "Get New Address",
       op = {
         ConsoleCli.exec(GetNewAddress(None),
                         GlobalData.consoleCliConfig) match {
-          case Success(commandReturn) => address.value = commandReturn
-          case Failure(err)           => throw err
+          case Success(commandReturn) => addressP.success(commandReturn)
+          case Failure(err) =>
+            addressP.failure(err)
+            throw err
         }
       }
     )
 
+    val address = Await.result(addressP.future, 15.seconds)
     GetNewAddressDialog.showAndWait(parentWindow.value, address)
   }
 

app/gui/src/main/scala/org/bitcoins/gui/dialog/GetNewAddressDialog.scala

@@ -1,9 +1,16 @@
 package org.bitcoins.gui.dialog
 
+import com.google.zxing.BarcodeFormat
+import com.google.zxing.common.BitMatrix
+import com.google.zxing.qrcode.QRCodeWriter
+import javafx.scene.image.WritableImage
+import javafx.scene.paint.Color
+import org.bitcoins.core.protocol.BitcoinAddress
 import org.bitcoins.gui.GlobalData
 import scalafx.Includes._
 import scalafx.beans.property.StringProperty
 import scalafx.scene.control.{ButtonType, Dialog, TextArea}
+import scalafx.scene.image.{Image, ImageView}
 import scalafx.stage.Window
 
 object GetNewAddressDialog {
@@ -27,7 +34,33 @@ object GetNewAddressDialog {
       text <== address
       editable = false
     }
+    val image: Image =
+      generateQRCode(address = BitcoinAddress.fromString(address.getValue))
+
+    val qrView = new ImageView(image)
+    dialog.graphic = qrView
 
     val _ = dialog.showAndWait()
   }
+
+  private def generateQRCode(address: BitcoinAddress): Image = {
+    val width = 250
+    val height = 250
+    val qrCodeWriter = new QRCodeWriter
+    val bitMatrix: BitMatrix =
+      qrCodeWriter.encode(s"bitcoin:$address",
+                          BarcodeFormat.QR_CODE,
+                          width,
+                          height)
+
+    val writableImage = new WritableImage(width, height)
+    val pixelWriter = writableImage.getPixelWriter
+    0.until(height).map { x =>
+      0.until(width).map { y =>
+        val color = if (bitMatrix.get(x, y)) Color.BLACK else Color.WHITE
+        pixelWriter.setColor(x, y, color)
+      }
+    }
+    writableImage
+  }
 }

project/Deps.scala

@@ -62,6 +62,8 @@ object Deps {
     val sttpV = "1.7.2"
     val codehausV = "3.1.4"
     val scalaJsTimeV = "2.3.0"
+    val zxingV = "3.4.1"
+
   }
 
   object Compile {
@@ -216,6 +218,12 @@ object Deps {
 
     val dropwizardMetrics =
       "io.dropwizard.metrics" % "metrics-core" % V.dropwizardMetricsV withSources () withJavadoc ()
+
+    val zxingCore =
+      "com.google.zxing" % "core" % V.zxingV withSources () withJavadoc ()
+
+    val zxingJ2SE =
+      "com.google.zxing" % "javase" % V.zxingV withSources () withJavadoc ()
   }
 
   object Test {
@@ -410,7 +418,9 @@ object Deps {
 
   val gui = List(Compile.akkaActor,
                  Compile.breezeViz,
-                 Compile.scalaFx) ++ Compile.javaFxDeps
+                 Compile.scalaFx,
+                 Compile.zxingCore,
+                 Compile.zxingJ2SE) ++ Compile.javaFxDeps
 
   val server = Def.setting {
     List(