Show Identicon for offerers or trading peers onion address and indicate repeated trades, Display additional info for Altcoins at buy/sell buttons

gui/src/main/java/io/bitsquare/gui/images.css

@@ -34,7 +34,6 @@
     -fx-image: url("../../../images/buy_white.png");
 }
 
-
 #image-sell {
     -fx-image: url("../../../images/sell.png");
 }
@@ -213,3 +212,64 @@
     -fx-image: url("../../../images/link.png");
 }
 
+#avatar_1 {
+    -fx-image: url("../../../images/avatars/avatar_1.png");
+}
+
+#avatar_2 {
+    -fx-image: url("../../../images/avatars/avatar_2.png");
+}
+
+#avatar_3 {
+    -fx-image: url("../../../images/avatars/avatar_3.png");
+}
+
+#avatar_4 {
+    -fx-image: url("../../../images/avatars/avatar_4.png");
+}
+
+#avatar_5 {
+    -fx-image: url("../../../images/avatars/avatar_5.png");
+}
+
+#avatar_6 {
+    -fx-image: url("../../../images/avatars/avatar_6.png");
+}
+
+#avatar_7 {
+    -fx-image: url("../../../images/avatars/avatar_7.png");
+}
+
+#avatar_8 {
+    -fx-image: url("../../../images/avatars/avatar_8.png");
+}
+
+#avatar_9 {
+    -fx-image: url("../../../images/avatars/avatar_9.png");
+}
+
+#avatar_10 {
+    -fx-image: url("../../../images/avatars/avatar_10.png");
+}
+
+#avatar_11 {
+    -fx-image: url("../../../images/avatars/avatar_11.png");
+}
+
+#avatar_12 {
+    -fx-image: url("../../../images/avatars/avatar_12.png");
+}
+
+#avatar_13 {
+    -fx-image: url("../../../images/avatars/avatar_13.png");
+}
+
+#avatar_14 {
+    -fx-image: url("../../../images/avatars/avatar_14.png");
+}
+
+#avatar_15 {
+    -fx-image: url("../../../images/avatars/avatar_15.png");
+}
+
+

gui/src/main/java/io/bitsquare/gui/main/offer/offerbook/OfferBookView.java

@@ -32,6 +32,7 @@ import io.bitsquare.gui.main.funds.withdrawal.WithdrawalView;
 import io.bitsquare.gui.main.offer.OfferView;
 import io.bitsquare.gui.main.overlays.popups.Popup;
 import io.bitsquare.gui.main.overlays.windows.OfferDetailsWindow;
+import io.bitsquare.gui.util.ImageUtil;
 import io.bitsquare.gui.util.Layout;
 import io.bitsquare.locale.BSResources;
 import io.bitsquare.locale.CryptoCurrency;
@@ -43,6 +44,7 @@ import javafx.beans.property.ReadOnlyObjectWrapper;
 import javafx.geometry.HPos;
 import javafx.geometry.Insets;
 import javafx.geometry.VPos;
+import javafx.scene.Node;
 import javafx.scene.control.*;
 import javafx.scene.image.ImageView;
 import javafx.scene.layout.GridPane;
@@ -153,6 +155,7 @@ public class OfferBookView extends ActivatableViewAndModel<GridPane, OfferBookVi
         paymentMethodColumn = getPaymentMethodColumn();
         tableView.getColumns().add(paymentMethodColumn);
         tableView.getColumns().add(getActionColumn());
+        tableView.getColumns().add(getAvatarColumn());
 
         tableView.getSortOrder().add(priceColumn);
         tableView.setColumnResizePolicy(TableView.CONSTRAINED_RESIZE_POLICY);
@@ -192,17 +195,18 @@ public class OfferBookView extends ActivatableViewAndModel<GridPane, OfferBookVi
         paymentMethodComboBox.setOnAction(e -> model.onSetPaymentMethod(paymentMethodComboBox.getSelectionModel().getSelectedItem()));
         createOfferButton.setOnAction(e -> onCreateOffer());
 
-        priceColumn.textProperty().bind(createStringBinding(
-                () -> !model.showAllTradeCurrenciesProperty.get() ?
-                        "Price in " + model.tradeCurrencyCode.get() + "/BTC" :
-                        "Price",
-                model.tradeCurrencyCode,
-                model.showAllTradeCurrenciesProperty));
-
         volumeColumn.textProperty().bind(createStringBinding(
-                () -> !model.showAllTradeCurrenciesProperty.get() ?
-                        "Amount in " + model.tradeCurrencyCode.get() + " (Min.)" :
-                        "Amount (Min.)",
+                () -> {
+                    setDirectionTitles();
+                    String tradeCurrencyCode = model.tradeCurrencyCode.get();
+                    boolean showAllTradeCurrencies = model.showAllTradeCurrenciesProperty.get();
+                    priceColumn.setText(!showAllTradeCurrencies ?
+                            "Price in " + tradeCurrencyCode + "/BTC" :
+                            "Price");
+                    return !showAllTradeCurrencies ?
+                            "Amount in " + tradeCurrencyCode + " (Min.)" :
+                            "Amount (Min.)";
+                },
                 model.tradeCurrencyCode,
                 model.showAllTradeCurrenciesProperty));
 
@@ -212,6 +216,7 @@ public class OfferBookView extends ActivatableViewAndModel<GridPane, OfferBookVi
         tableView.setItems(model.getOfferList());
         priceColumn.setSortType((model.getDirection() == Offer.Direction.BUY) ? TableColumn.SortType.ASCENDING : TableColumn.SortType.DESCENDING);
         tableView.sort();
+
     }
 
     @Override
@@ -237,17 +242,22 @@ public class OfferBookView extends ActivatableViewAndModel<GridPane, OfferBookVi
         ImageView iconView = new ImageView();
 
         createOfferButton.setGraphic(iconView);
-        if (direction == Offer.Direction.SELL) {
-            offerBookTitle.setText("Offers for buying bitcoin ");
-            createOfferButton.setId("sell-button-big");
-            createOfferButton.setText("Create new offer for selling bitcoin");
-            iconView.setId("image-sell-white");
-        } else {
-            offerBookTitle.setText("Offers for selling bitcoin ");
-            createOfferButton.setId("buy-button-big");
-            createOfferButton.setText("Create new offer for buying bitcoin");
-            iconView.setId("image-buy-white");
-        }
+        iconView.setId(direction == Offer.Direction.SELL ? "image-sell-white" : "image-buy-white");
+        createOfferButton.setId(direction == Offer.Direction.SELL ? "sell-button-big" : "buy-button-big");
+
+        setDirectionTitles();
+    }
+
+    private void setDirectionTitles() {
+        Offer.Direction direction = model.getDirection();
+        String directionText = direction == Offer.Direction.BUY ? "buying" : "selling";
+        String mirroredDirectionText = direction == Offer.Direction.SELL ? "buying" : "selling";
+        TradeCurrency selectedTradeCurrency = model.getSelectedTradeCurrency();
+        String postFix = selectedTradeCurrency instanceof FiatCurrency || model.showAllTradeCurrenciesProperty.get() ? "" :
+                " (" + mirroredDirectionText + " " + selectedTradeCurrency.getName() + ")";
+
+        offerBookTitle.setText("Offers for " + directionText + " bitcoin" + postFix);
+        createOfferButton.setText("Create new offer for " + directionText + " bitcoin" + postFix);
     }
 
     public void setOfferActionHandler(OfferView.OfferActionHandler offerActionHandler) {
@@ -568,5 +578,44 @@ public class OfferBookView extends ActivatableViewAndModel<GridPane, OfferBookVi
                 });
         return column;
     }
+
+    private TableColumn<OfferBookListItem, OfferBookListItem> getAvatarColumn() {
+        TableColumn<OfferBookListItem, OfferBookListItem> column = new TableColumn<OfferBookListItem, OfferBookListItem>("") {
+            {
+                setMinWidth(32);
+                setMaxWidth(32);
+                setSortable(true);
+            }
+        };
+        column.setCellValueFactory((offer) -> new ReadOnlyObjectWrapper<>(offer.getValue()));
+        column.setCellFactory(
+                new Callback<TableColumn<OfferBookListItem, OfferBookListItem>, TableCell<OfferBookListItem,
+                        OfferBookListItem>>() {
+
+                    @Override
+                    public TableCell<OfferBookListItem, OfferBookListItem> call(TableColumn<OfferBookListItem, OfferBookListItem> column) {
+                        return new TableCell<OfferBookListItem, OfferBookListItem>() {
+                            @Override
+                            public void updateItem(final OfferBookListItem newItem, boolean empty) {
+                                super.updateItem(newItem, empty);
+
+                                if (newItem != null && !empty) {
+                                    String hostName = newItem.getOffer().getOwnerNodeAddress().hostName;
+                                    int numPastTrades = model.getNumPastTrades(newItem.getOffer());
+                                    boolean hasTraded = numPastTrades > 0;
+                                    String tooltipText = hasTraded ? "Offerers onion address: " + hostName + "\n" +
+                                            "You have already traded " + numPastTrades + " times with that offerer." : "Offerers onion address: " + hostName;
+                                    Node identIcon = ImageUtil.getIdentIcon(hostName, tooltipText, hasTraded);
+                                    if (identIcon != null)
+                                        setGraphic(identIcon);
+                                } else {
+                                    setGraphic(null);
+                                }
+                            }
+                        };
+                    }
+                });
+        return column;
+    }
 }
 

gui/src/main/java/io/bitsquare/gui/main/offer/offerbook/OfferBookViewModel.java

@@ -33,6 +33,8 @@ import io.bitsquare.locale.*;
 import io.bitsquare.p2p.NodeAddress;
 import io.bitsquare.p2p.P2PService;
 import io.bitsquare.payment.*;
+import io.bitsquare.trade.Trade;
+import io.bitsquare.trade.closed.ClosedTradableManager;
 import io.bitsquare.trade.offer.Offer;
 import io.bitsquare.trade.offer.OpenOfferManager;
 import io.bitsquare.user.Preferences;
@@ -69,6 +71,7 @@ class OfferBookViewModel extends ActivatableViewModel {
     private final Preferences preferences;
     private final P2PService p2PService;
     private final PriceFeed priceFeed;
+    private ClosedTradableManager closedTradableManager;
     private Navigation navigation;
     final BSFormatter formatter;
 
@@ -101,6 +104,7 @@ class OfferBookViewModel extends ActivatableViewModel {
     @Inject
     public OfferBookViewModel(User user, OpenOfferManager openOfferManager, OfferBook offerBook,
                               Preferences preferences, P2PService p2PService, PriceFeed priceFeed,
+                              ClosedTradableManager closedTradableManager,
                               Navigation navigation, BSFormatter formatter) {
         super();
 
@@ -110,6 +114,7 @@ class OfferBookViewModel extends ActivatableViewModel {
         this.preferences = preferences;
         this.p2PService = p2PService;
         this.priceFeed = priceFeed;
+        this.closedTradableManager = closedTradableManager;
         this.navigation = navigation;
         this.formatter = formatter;
 
@@ -435,4 +440,12 @@ class OfferBookViewModel extends ActivatableViewModel {
     private boolean isEditEntry(String id) {
         return id.equals(EDIT_FLAG);
     }
+
+    public int getNumPastTrades(Offer offer) {
+        return closedTradableManager.getClosedTrades().stream()
+                .filter(e -> e instanceof Trade && ((Trade) e).getTradingPeerNodeAddress() != null &&
+                        ((Trade) e).getTradingPeerNodeAddress().hostName.equals(offer.getOffererNodeAddress().hostName))
+                .collect(Collectors.toSet())
+                .size();
+    }
 }

gui/src/main/java/io/bitsquare/gui/main/portfolio/closedtrades/ClosedTradesView.fxml

@@ -35,6 +35,7 @@
             <TableColumn text="Trade amount" fx:id="volumeColumn" minWidth="130"/>
             <TableColumn text="Trade type" fx:id="directionColumn" minWidth="80"/>
             <TableColumn text="State" fx:id="stateColumn" minWidth="80" sortable="false"/>
+            <TableColumn text="" fx:id="avatarColumn" minWidth="32" maxWidth="32"/>
         </columns>
     </TableView>
 

gui/src/main/java/io/bitsquare/gui/main/portfolio/closedtrades/ClosedTradesView.java

@@ -23,11 +23,13 @@ import io.bitsquare.gui.components.HyperlinkWithIcon;
 import io.bitsquare.gui.main.overlays.windows.OfferDetailsWindow;
 import io.bitsquare.gui.main.overlays.windows.TradeDetailsWindow;
 import io.bitsquare.gui.util.BSFormatter;
+import io.bitsquare.gui.util.ImageUtil;
 import io.bitsquare.trade.Tradable;
 import io.bitsquare.trade.Trade;
 import io.bitsquare.trade.offer.OpenOffer;
 import javafx.beans.property.ReadOnlyObjectWrapper;
 import javafx.fxml.FXML;
+import javafx.scene.Node;
 import javafx.scene.control.*;
 import javafx.scene.layout.VBox;
 import javafx.util.Callback;
@@ -41,7 +43,7 @@ public class ClosedTradesView extends ActivatableViewAndModel<VBox, ClosedTrades
     TableView<ClosedTradableListItem> table;
     @FXML
     TableColumn<ClosedTradableListItem, ClosedTradableListItem> priceColumn, amountColumn, volumeColumn,
-            directionColumn, dateColumn, tradeIdColumn, stateColumn;
+            directionColumn, dateColumn, tradeIdColumn, stateColumn, avatarColumn;
     private final BSFormatter formatter;
     private final OfferDetailsWindow offerDetailsWindow;
     private final TradeDetailsWindow tradeDetailsWindow;
@@ -63,6 +65,7 @@ public class ClosedTradesView extends ActivatableViewAndModel<VBox, ClosedTrades
         setVolumeColumnCellFactory();
         setDateColumnCellFactory();
         setStateColumnCellFactory();
+        setAvatarColumnCellFactory();
 
         table.setColumnResizePolicy(TableView.CONSTRAINED_RESIZE_POLICY);
         table.setPlaceholder(new Label("No closed trades available"));
@@ -155,6 +158,34 @@ public class ClosedTradesView extends ActivatableViewAndModel<VBox, ClosedTrades
                 });
     }
 
+    private TableColumn<ClosedTradableListItem, ClosedTradableListItem> setAvatarColumnCellFactory() {
+        avatarColumn.setCellValueFactory((offer) -> new ReadOnlyObjectWrapper<>(offer.getValue()));
+        avatarColumn.setCellFactory(
+                new Callback<TableColumn<ClosedTradableListItem, ClosedTradableListItem>, TableCell<ClosedTradableListItem,
+                        ClosedTradableListItem>>() {
+
+                    @Override
+                    public TableCell<ClosedTradableListItem, ClosedTradableListItem> call(TableColumn<ClosedTradableListItem, ClosedTradableListItem> column) {
+                        return new TableCell<ClosedTradableListItem, ClosedTradableListItem>() {
+                            @Override
+                            public void updateItem(final ClosedTradableListItem newItem, boolean empty) {
+                                super.updateItem(newItem, empty);
+
+                                if (newItem != null && !empty && newItem.getTradable() instanceof Trade) {
+
+                                    String hostName = ((Trade) newItem.getTradable()).getTradingPeerNodeAddress().hostName;
+                                    Node identIcon = ImageUtil.getIdentIcon(hostName, "Trading peers onion address: " + hostName, true);
+                                    if (identIcon != null)
+                                        setGraphic(identIcon);
+                                } else {
+                                    setGraphic(null);
+                                }
+                            }
+                        };
+                    }
+                });
+        return avatarColumn;
+    }
 
     private void setAmountColumnCellFactory() {
         amountColumn.setCellValueFactory((offer) -> new ReadOnlyObjectWrapper<>(offer.getValue()));

gui/src/main/java/io/bitsquare/gui/main/portfolio/pendingtrades/PendingTradesView.fxml

@@ -52,6 +52,7 @@
             </TableColumn>
             <TableColumn text="Payment method" fx:id="paymentMethodColumn" minWidth="120"/>
             <TableColumn text="My role" fx:id="roleColumn" minWidth="120" maxWidth="120"/>
+            <TableColumn text="" fx:id="avatarColumn" minWidth="32" maxWidth="32"/>
         </columns>
     </TableView>
 </VBox>

gui/src/main/java/io/bitsquare/gui/main/portfolio/pendingtrades/PendingTradesView.java

@@ -25,9 +25,11 @@ import io.bitsquare.gui.components.HyperlinkWithIcon;
 import io.bitsquare.gui.main.overlays.popups.Popup;
 import io.bitsquare.gui.main.overlays.windows.TradeDetailsWindow;
 import io.bitsquare.gui.util.BSFormatter;
+import io.bitsquare.gui.util.ImageUtil;
 import javafx.beans.property.ReadOnlyObjectWrapper;
 import javafx.event.EventHandler;
 import javafx.fxml.FXML;
+import javafx.scene.Node;
 import javafx.scene.Scene;
 import javafx.scene.control.*;
 import javafx.scene.control.cell.TextFieldTableCell;
@@ -56,7 +58,7 @@ public class PendingTradesView extends ActivatableViewAndModel<VBox, PendingTrad
     @FXML
     TableColumn<PendingTradesListItem, Fiat> priceColumn, tradeVolumeColumn;
     @FXML
-    TableColumn<PendingTradesListItem, PendingTradesListItem> roleColumn, paymentMethodColumn, idColumn, dateColumn;
+    TableColumn<PendingTradesListItem, PendingTradesListItem> avatarColumn, roleColumn, paymentMethodColumn, idColumn, dateColumn;
     @FXML
     TableColumn<PendingTradesListItem, Coin> tradeAmountColumn;
 
@@ -88,6 +90,7 @@ public class PendingTradesView extends ActivatableViewAndModel<VBox, PendingTrad
         setVolumeColumnCellFactory();
         setPaymentMethodColumnCellFactory();
         setRoleColumnCellFactory();
+        setAvatarColumnCellFactory();
 
         table.setColumnResizePolicy(TableView.CONSTRAINED_RESIZE_POLICY);
         table.setPlaceholder(new Label("No pending trades available"));
@@ -365,5 +368,37 @@ public class PendingTradesView extends ActivatableViewAndModel<VBox, PendingTrad
                     }
                 });
     }
+
+    private TableColumn<PendingTradesListItem, PendingTradesListItem> setAvatarColumnCellFactory() {
+        avatarColumn.setCellValueFactory((offer) -> new ReadOnlyObjectWrapper<>(offer.getValue()));
+        avatarColumn.setCellFactory(
+                new Callback<TableColumn<PendingTradesListItem, PendingTradesListItem>, TableCell<PendingTradesListItem,
+                        PendingTradesListItem>>() {
+
+                    @Override
+                    public TableCell<PendingTradesListItem, PendingTradesListItem> call(TableColumn<PendingTradesListItem, PendingTradesListItem> column) {
+                        return new TableCell<PendingTradesListItem, PendingTradesListItem>() {
+                            @Override
+                            public void updateItem(final PendingTradesListItem newItem, boolean empty) {
+                                super.updateItem(newItem, empty);
+
+                                if (newItem != null && !empty && newItem.getTrade().getTradingPeerNodeAddress() != null) {
+                                    String hostName = newItem.getTrade().getTradingPeerNodeAddress().hostName;
+                                    int numPastTrades = model.getNumPastTrades(newItem.getTrade());
+                                    boolean hasTraded = numPastTrades > 0;
+                                    String tooltipText = hasTraded ? "Trading peers onion address: " + hostName + "\n" +
+                                            "You have already traded " + numPastTrades + " times with that peer." : "Trading peers onion address: " + hostName;
+                                    Node identIcon = ImageUtil.getIdentIcon(hostName, tooltipText, hasTraded);
+                                    if (identIcon != null)
+                                        setGraphic(identIcon);
+                                } else {
+                                    setGraphic(null);
+                                }
+                            }
+                        };
+                    }
+                });
+        return avatarColumn;
+    }
 }
 

gui/src/main/java/io/bitsquare/gui/main/portfolio/pendingtrades/PendingTradesViewModel.java

@@ -30,6 +30,7 @@ import io.bitsquare.p2p.P2PService;
 import io.bitsquare.payment.PaymentMethod;
 import io.bitsquare.trade.Contract;
 import io.bitsquare.trade.Trade;
+import io.bitsquare.trade.closed.ClosedTradableManager;
 import io.bitsquare.trade.offer.Offer;
 import io.bitsquare.user.User;
 import javafx.beans.property.*;
@@ -38,6 +39,8 @@ import org.bitcoinj.core.BlockChainListener;
 import org.fxmisc.easybind.EasyBind;
 import org.fxmisc.easybind.Subscription;
 
+import java.util.stream.Collectors;
+
 import static io.bitsquare.gui.main.portfolio.pendingtrades.PendingTradesViewModel.SellerState.*;
 
 public class PendingTradesViewModel extends ActivatableWithDataModel<PendingTradesDataModel> implements ViewModel {
@@ -70,6 +73,7 @@ public class PendingTradesViewModel extends ActivatableWithDataModel<PendingTrad
 
     public final P2PService p2PService;
     public final User user;
+    private ClosedTradableManager closedTradableManager;
     public final Clock clock;
 
     private final ObjectProperty<BuyerState> buyerState = new SimpleObjectProperty<>();
@@ -88,6 +92,7 @@ public class PendingTradesViewModel extends ActivatableWithDataModel<PendingTrad
                                   BtcAddressValidator btcAddressValidator,
                                   P2PService p2PService,
                                   User user,
+                                  ClosedTradableManager closedTradableManager,
                                   Clock clock) {
         super(dataModel);
 
@@ -95,6 +100,7 @@ public class PendingTradesViewModel extends ActivatableWithDataModel<PendingTrad
         this.btcAddressValidator = btcAddressValidator;
         this.p2PService = p2PService;
         this.user = user;
+        this.closedTradableManager = closedTradableManager;
         this.clock = clock;
     }
 
@@ -256,6 +262,13 @@ public class PendingTradesViewModel extends ActivatableWithDataModel<PendingTrad
         return dataModel.getOffer() != null && dataModel.getOffer().getPaymentMethod().equals(PaymentMethod.BLOCK_CHAINS);
     }
 
+    public int getNumPastTrades(Trade trade) {
+        return closedTradableManager.getClosedTrades().stream()
+                .filter(e -> e instanceof Trade && ((Trade) e).getTradingPeerNodeAddress() != null &&
+                        ((Trade) e).getTradingPeerNodeAddress().hostName.equals(trade.getTradingPeerNodeAddress().hostName))
+                .collect(Collectors.toSet())
+                .size();
+    }
 
     ///////////////////////////////////////////////////////////////////////////////////////////
     // States

gui/src/main/java/io/bitsquare/gui/util/ImageUtil.java

@@ -19,11 +19,21 @@ package io.bitsquare.gui.util;
 
 import com.sun.javafx.tk.quantum.QuantumToolkit;
 import io.bitsquare.locale.Country;
+import javafx.scene.Group;
+import javafx.scene.Node;
+import javafx.scene.canvas.Canvas;
+import javafx.scene.canvas.GraphicsContext;
+import javafx.scene.control.Tooltip;
 import javafx.scene.image.Image;
 import javafx.scene.image.ImageView;
+import javafx.scene.paint.Color;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.UUID;
+
 
 public class ImageUtil {
     private static final Logger log = LoggerFactory.getLogger(ImageUtil.class);
@@ -55,6 +65,71 @@ public class ImageUtil {
     }
 
     public static boolean isRetina() {
-        return ((QuantumToolkit) QuantumToolkit.getToolkit()).getMaxRenderScale() > 1.9f;
+        float maxRenderScale = ((QuantumToolkit) QuantumToolkit.getToolkit()).getMaxRenderScale();
+        boolean isRetina = maxRenderScale > 1.9f;
+        log.info("isRetina=" + isRetina + " / maxRenderScale=" + maxRenderScale);
+        return isRetina;
+    }
+
+    public static Node getIdentIcon(String hostName, String tooltipText, boolean hasTraded) {
+        if (!hostName.isEmpty()) {
+            // for testing locally we use a random hostname to get dif. colors
+            if (hostName.startsWith("localhost"))
+                hostName = UUID.randomUUID().toString().replace("-", "").substring(0, 16);
+
+            int maxIndices = 15;
+            try {
+                MessageDigest md = MessageDigest.getInstance("SHA1");
+                byte[] bytes = md.digest(hostName.getBytes());
+                int intValue = Math.abs(((bytes[0] & 0xFF) << 24) | ((bytes[1] & 0xFF) << 16)
+                        | ((bytes[2] & 0xFF) << 8) | (bytes[3] & 0xFF));
+
+                int index = (intValue % maxIndices) + 1;
+
+                int red = intValue % 256;
+                int green = (intValue >> 8) % 64; // we use green for marking repeated trades, so avoid it in main bg color
+                int blue = (intValue >> 16) % 256;
+
+                ImageView iconView = new ImageView();
+                iconView.setId("avatar_" + index);
+                iconView.setScaleX(intValue % 2 == 0 ? 1d : -1d);
+                double size = 26;
+                Group iconGroup = new Group();
+
+                Color color = Color.rgb(red, green, blue);
+                color = color.deriveColor(1, 0.6, 1, 1); // reduce saturation
+
+                if (hasTraded) {
+                    Canvas outerBg = new Canvas(size, size);
+                    GraphicsContext gc = outerBg.getGraphicsContext2D();
+                    gc.setFill(Color.rgb(0, 170, 51)); // green
+                    gc.fillOval(0, 0, size, size);
+                    outerBg.setLayoutY(1);
+
+                    Canvas innerBg = new Canvas(size, size);
+                    GraphicsContext gc2 = innerBg.getGraphicsContext2D();
+                    gc2.setFill(color);
+                    gc2.fillOval(2, 2, size - 4, size - 4);
+                    innerBg.setLayoutY(1);
+                    iconGroup.getChildren().addAll(outerBg, innerBg, iconView);
+                } else {
+                    Canvas bg = new Canvas(size, size);
+                    GraphicsContext gc = bg.getGraphicsContext2D();
+                    gc.setFill(color);
+                    gc.fillOval(0, 0, size, size);
+                    bg.setLayoutY(1);
+                    iconGroup.getChildren().addAll(bg, iconView);
+                }
+
+                Tooltip.install(iconGroup, new Tooltip(tooltipText));
+                return iconGroup;
+            } catch (NoSuchAlgorithmException e) {
+                e.printStackTrace();
+                log.error(e.toString());
+                return null;
+            }
+        } else {
+            return null;
+        }
     }
 }