Some quick reworkings. FP selection is working!

src/main/java/de/vanitasvitae/omemoqrgenerator/ListViewCell.java

@@ -23,8 +23,6 @@ public class ListViewCell extends JFXListCell<OmemoIdentity> {
     @FXML
     private JFXToggleButton toggle;
 
-    private QrDisplayController displayController = null;
-
     public ListViewCell() {
         FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("/fxml/item.fxml"));
         fxmlLoader.setController(this);
@@ -38,27 +36,21 @@ public class ListViewCell extends JFXListCell<OmemoIdentity> {
         }
     }
 
-    public void setDisplayController(QrDisplayController controller)  {
-        this.displayController = controller;
-    }
-
     @Override
     public void updateItem(OmemoIdentity identity, boolean empty) {
+        Repository repository = Repository.getInstance();
         if (empty) {
             return;
         }
 
-        if (id != null) id.setText(Integer.toString(identity.getDevice().getDeviceId()));
+        id.setText(Integer.toString(identity.getDevice().getDeviceId()));
-        if (fingerprint != null) fingerprint.setText(identity.getFingerprint().blocksOf8Chars());
+        fingerprint.setText(Util.twoLinesFingerprint(identity.getFingerprint()));
-        if (toggle != null) toggle.setSelected(identity.getEnabled());
+        toggle.setSelected(identity.getEnabled());
-        if (hBox != null) setGraphic(hBox);
+        setGraphic(hBox);
-        if (toggle != null) {
+
         toggle.setOnAction(actionEvent -> {
             identity.setEnabled(toggle.isSelected());
-                if (displayController != null) {
+            repository.getIdentities().add(repository.getIdentities().remove(repository.getIdentities().size() -1));
-                    displayController.drawQRCode();
-                }
         });
     }
 }
-}

src/main/java/de/vanitasvitae/omemoqrgenerator/ListViewController.java

@@ -1,37 +1,28 @@
 package de.vanitasvitae.omemoqrgenerator;
 
-import java.util.Collection;
+import javafx.event.EventHandler;
-
-import com.jfoenix.controls.JFXListView;
-import javafx.collections.FXCollections;
-import javafx.collections.ObservableList;
 import javafx.fxml.FXML;
+import javafx.scene.control.ListView;
+import javafx.scene.input.ScrollEvent;
 
 public class ListViewController {
 
     @FXML
-    private JFXListView<OmemoIdentity> listView;
+    private ListView<OmemoIdentity> listView;
 
-    private ObservableList<OmemoIdentity> identities = FXCollections.observableArrayList();
-
-    private QrDisplayController displayController = null;
-
-    public void setDisplayController(QrDisplayController controller) {
-        this.displayController = controller;
-    }
-
-    public void setIdentities(Collection<OmemoIdentity> identities) {
-        this.identities.clear();
-        this.identities.addAll(identities);
-    }
 
     @FXML
     void initialize() {
+        Repository repository = Repository.getInstance();
         listView.setCellFactory(listView -> {
             ListViewCell cell = new ListViewCell();
-            cell.setDisplayController(displayController);
+            return cell;
-            return new ListViewCell();
+        });
+        listView.setItems(repository.getIdentities());
+        listView.addEventFilter(ScrollEvent.SCROLL, event -> {
+            if (event.getDeltaX() != 0) {
+                event.consume();
+            }
         });
-        listView.setItems(identities);
     }
 }

src/main/java/de/vanitasvitae/omemoqrgenerator/Main.java

@@ -1,11 +1,8 @@
 package de.vanitasvitae.omemoqrgenerator;
 
-import java.io.IOException;
 import java.util.Map;
 
 import org.jivesoftware.smack.SmackConfiguration;
-import org.jivesoftware.smack.SmackException;
-import org.jivesoftware.smack.XMPPException;
 import org.jivesoftware.smack.packet.Presence;
 import org.jivesoftware.smack.tcp.XMPPTCPConnection;
 import org.jivesoftware.smackx.omemo.internal.OmemoDevice;
@@ -14,13 +11,11 @@ import org.jivesoftware.smackx.omemo.trust.OmemoFingerprint;
 import javafx.application.Application;
 import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
-import javafx.fxml.FXML;
 import javafx.fxml.FXMLLoader;
 import javafx.scene.Parent;
 import javafx.scene.Scene;
 import javafx.stage.Stage;
 import org.jxmpp.jid.BareJid;
-import org.jxmpp.stringprep.XmppStringprepException;
 
 public class Main extends Application implements LoginCallback {
 
@@ -83,7 +78,9 @@ public class Main extends Application implements LoginCallback {
         loader.setLocation(getClass().getResource("/fxml/login.fxml"));
         Parent root = loader.load();
         stage.setMinHeight(600);
+        stage.setMaxHeight(600);
         stage.setMinWidth(400);
+        stage.setMaxWidth(400);
 
         // Register ourselves as callback for the login button.
         LoginController loginController = loader.getController();
@@ -97,21 +94,19 @@ public class Main extends Application implements LoginCallback {
 
     @Override
     public void login(String username, String password) {
-        XMPPTCPConnection connection = null;
+        Repository repository = Repository.getInstance();
+        XMPPTCPConnection connection;
         try {
             connection = new XMPPTCPConnection(username, password);
             connection.connect().login();
 
-            if (connection == null) {
+            repository.setJid(connection.getUser().asBareJid());
-                return;
-            }
-
-            BareJid jid = connection.getUser().asBareJid();
             Map<OmemoDevice, OmemoFingerprint> fingerprints = Util.getFingerprints(connection);
 
-            ObservableList<OmemoIdentity> identities = FXCollections.observableArrayList();
+            ObservableList<OmemoIdentity> identities = repository.getIdentities();
             for (OmemoDevice device : fingerprints.keySet()) {
                 identities.addAll(new OmemoIdentity(device, fingerprints.get(device)));
+                System.out.println(Util.twoLinesFingerprint(fingerprints.get(device)));
             }
 
             connection.disconnect(new Presence(Presence.Type.unavailable));
@@ -119,8 +114,6 @@ public class Main extends Application implements LoginCallback {
             FXMLLoader loader = new FXMLLoader();
             loader.setLocation(getClass().getResource("/fxml/qrdisplay.fxml"));
             Parent root = loader.load();
-            QrDisplayController controller = loader.getController();
-            controller.setFingerprints(jid, identities);
 
             Scene scene = new Scene(root, 400, 600);
             stage.setTitle("OMEMO QR-Code Generator");

src/main/java/de/vanitasvitae/omemoqrgenerator/QrDisplayController.java

@@ -2,24 +2,19 @@ package de.vanitasvitae.omemoqrgenerator;
 
 import java.awt.*;
 import java.awt.image.BufferedImage;
-import java.util.HashSet;
 import java.util.Iterator;
-import java.util.Map;
-import java.util.Set;
-
-import org.jivesoftware.smackx.omemo.internal.OmemoDevice;
-import org.jivesoftware.smackx.omemo.trust.OmemoFingerprint;
 
 import com.google.zxing.BarcodeFormat;
 import com.google.zxing.WriterException;
 import com.google.zxing.common.BitMatrix;
 import com.google.zxing.qrcode.QRCodeWriter;
-import javafx.collections.ObservableList;
+import com.jfoenix.controls.JFXListView;
+import javafx.collections.ListChangeListener;
 import javafx.embed.swing.SwingFXUtils;
 import javafx.fxml.FXML;
+import javafx.scene.control.ListView;
 import javafx.scene.image.ImageView;
 import javafx.scene.layout.GridPane;
-import org.jxmpp.jid.BareJid;
 
 public class QrDisplayController {
 
@@ -27,29 +22,29 @@ public class QrDisplayController {
     private ImageView qr_view;
 
     @FXML
-    private GridPane listView;
+    private ListView listView;
 
     @FXML
     private ListViewController listViewController;
 
-    private BareJid jid;
+    private Repository repository = Repository.getInstance();
-    private ObservableList<OmemoIdentity> identities = null;
 
-    public void setFingerprints(BareJid jid, ObservableList<OmemoIdentity> identities) {
+    @FXML
-        this.jid = jid;
+    public void initialize() {
-        this.identities = identities;
-        this.listViewController.setDisplayController(this);
-        this.listViewController.setIdentities(this.identities);
         drawQRCode();
+        repository.getIdentities().addListener((ListChangeListener<OmemoIdentity>) change -> drawQRCode());
     }
 
     public void drawQRCode() {
-        int width = 300, height = 300;
+        System.out.println("Draw!");
+        Repository repository = Repository.getInstance();
+
+        int width = 360, height = 360;
         QRCodeWriter qrCodeWriter = new QRCodeWriter();
 
-        String content = "xmpp:" + jid.toString();
+        String content = "xmpp:" + repository.getJid().toString();
 
-        Iterator<OmemoIdentity> iterator = identities.iterator();
+        Iterator<OmemoIdentity> iterator = repository.getIdentities().iterator();
 
         while (iterator.hasNext()) {
             OmemoIdentity first = iterator.next();

src/main/java/de/vanitasvitae/omemoqrgenerator/Repository.java

@@ -0,0 +1,36 @@
+package de.vanitasvitae.omemoqrgenerator;
+
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
+import org.jxmpp.jid.BareJid;
+
+public class Repository {
+
+    private static Repository INSTANCE;
+
+    private final ObservableList<OmemoIdentity> IDENTITIES = FXCollections.observableArrayList();
+    private BareJid JID = null;
+
+    private Repository() {
+
+    }
+
+    public static Repository getInstance() {
+        if (INSTANCE == null) {
+            INSTANCE = new Repository();
+        }
+        return INSTANCE;
+    }
+
+    public BareJid getJid() {
+        return JID;
+    }
+
+    public void setJid(BareJid jid) {
+        this.JID = jid;
+    }
+
+    public ObservableList<OmemoIdentity> getIdentities() {
+        return IDENTITIES;
+    }
+}

src/main/java/de/vanitasvitae/omemoqrgenerator/Util.java

@@ -20,6 +20,7 @@ import org.jivesoftware.smackx.pubsub.PayloadItem;
 import org.jivesoftware.smackx.pubsub.PubSubException;
 import org.jivesoftware.smackx.pubsub.PubSubManager;
 
+import org.bouncycastle.util.Strings;
 import org.jxmpp.jid.BareJid;
 
 public class Util {
@@ -94,4 +95,11 @@ public class Util {
 
         return items.get(items.size() - 1).getPayload();
     }
+
+    public static String twoLinesFingerprint(OmemoFingerprint fingerprint) {
+        String blocks = fingerprint.blocksOf8Chars();
+        String out = blocks.substring(0, 35);
+        out = out + "\n" + blocks.substring(36);
+        return out;
+    }
 }

src/main/resources/fxml/item.fxml

@@ -1,13 +1,31 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
-
-<?import javafx.scene.control.Label?>
-<?import javafx.scene.layout.HBox?>
 <?import com.jfoenix.controls.JFXToggleButton?>
-<HBox xmlns:fx="http://javafx.com/fxml" fx:id="hBox">
+<?import javafx.geometry.Insets?>
+<?import javafx.scene.control.Label?>
+<?import javafx.scene.layout.AnchorPane?>
+<?import javafx.scene.layout.HBox?>
+<?import javafx.scene.text.Font?>
+
+<HBox fx:id="hBox" xmlns="http://javafx.com/javafx/8.0.162-ea" xmlns:fx="http://javafx.com/fxml/1">
     <children>
-        <Label fx:id="id"/>
+      <AnchorPane prefHeight="67.0" prefWidth="300.0" maxWidth="350">
-        <Label fx:id="fingerprint"/>
+         <children>
-        <JFXToggleButton fx:id="toggle" />
+              <Label fx:id="id" alignment="BASELINE_RIGHT" text="1429677125" AnchorPane.bottomAnchor="0.0" AnchorPane.rightAnchor="0.0">
+               <padding>
+                  <Insets bottom="5.0" right="5.0" />
+               </padding>
+            </Label>
+            <Label fx:id="fingerprint" layoutX="100.0" prefHeight="44.0" prefWidth="288.0" AnchorPane.bottomAnchor="23.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
+               <padding>
+                  <Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
+               </padding>
+               <font>
+                  <Font name="Bitstream Vera Sans Mono" size="13.0" />
+               </font>
+            </Label>
+         </children>
+      </AnchorPane>
+        <JFXToggleButton fx:id="toggle" alignment="CENTER_RIGHT" contentDisplay="GRAPHIC_ONLY" selected="true" text="ToggleButton" />
     </children>
 </HBox>

src/main/resources/fxml/listview.fxml

@@ -1,16 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
-<?import com.jfoenix.controls.JFXListView?>
+<?import javafx.scene.control.ListView?>
-<?import javafx.scene.layout.ColumnConstraints?>
-<?import javafx.scene.layout.GridPane?>
-<?import javafx.scene.layout.RowConstraints?>
 
-<GridPane alignment="CENTER" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8.0.162-ea" fx:controller="de.vanitasvitae.omemoqrgenerator.ListViewController">
+
-    <JFXListView fx:id="listView" minWidth="400.0" prefWidth="400.0" />
+<ListView fx:id="listView" maxHeight="200" maxWidth="400.0" minHeight="200.0" minWidth="400.0" prefHeight="200.0" prefWidth="400.0" xmlns="http://javafx.com/javafx/8.0.162-ea" xmlns:fx="http://javafx.com/fxml/1" fx:controller="de.vanitasvitae.omemoqrgenerator.ListViewController" />
-   <columnConstraints>
-      <ColumnConstraints />
-   </columnConstraints>
-   <rowConstraints>
-      <RowConstraints />
-   </rowConstraints>
-</GridPane>

src/main/resources/fxml/login.fxml

@@ -9,8 +9,9 @@
 
 <VBox xmlns="http://javafx.com/javafx/8.0.162-ea"
       xmlns:fx="http://javafx.com/fxml/1"
-      alignment="CENTER" minHeight="400.0" minWidth="600.0"
+      alignment="CENTER"
-      prefHeight="400.0" prefWidth="600.0"
+      minHeight="600.0" minWidth="400.0"
+      prefHeight="600.0" prefWidth="400.0"
       fx:controller="de.vanitasvitae.omemoqrgenerator.LoginController">
    <children>
       <HBox alignment="CENTER" prefHeight="100.0" prefWidth="200.0">

src/main/resources/fxml/qrdisplay.fxml

@@ -2,7 +2,8 @@
 
 <?import javafx.scene.image.ImageView?>
 <?import javafx.scene.layout.VBox?>
-<VBox alignment="TOP_CENTER" minHeight="400.0" minWidth="600.0" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8.0.162-ea" xmlns:fx="http://javafx.com/fxml/1" fx:controller="de.vanitasvitae.omemoqrgenerator.QrDisplayController">
+
+<VBox alignment="TOP_CENTER" style="-fx-background-color: #FFFFFF;" xmlns="http://javafx.com/javafx/8.0.162-ea" xmlns:fx="http://javafx.com/fxml/1" fx:controller="de.vanitasvitae.omemoqrgenerator.QrDisplayController">
     <children>
         <ImageView fx:id="qr_view" />
         <fx:include fx:id="listView" source="listview.fxml" />