Specify view root node type with generic parameter

src/main/java/io/bitsquare/gui/AbstractView.java

@@ -23,12 +23,12 @@ import javafx.scene.*;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-public abstract class AbstractView<M> implements View {
+public abstract class AbstractView<R extends Parent, M> implements View {
 
     protected final Logger log = LoggerFactory.getLogger(this.getClass());
 
+    protected @FXML R root;
     protected final M model;
-    protected @FXML Parent root;
 
     public AbstractView(M model) {
         this.model = model;

src/main/java/io/bitsquare/gui/ActivatableView.java

@@ -17,7 +17,9 @@
 
 package io.bitsquare.gui;
 
-public abstract class ActivatableView<M> extends InitializableView<M> {
+import javafx.scene.*;
+
+public abstract class ActivatableView<R extends Parent, M> extends InitializableView<R, M> {
 
     public ActivatableView(M model) {
         super(model);

src/main/java/io/bitsquare/gui/ActivatableViewAndModel.java

@@ -17,9 +17,11 @@
 
 package io.bitsquare.gui;
 
+import javafx.scene.*;
+
 import static com.google.common.base.Preconditions.checkNotNull;
 
-public abstract class ActivatableViewAndModel<M extends Activatable> extends ActivatableView<M> {
+public abstract class ActivatableViewAndModel<R extends Parent, M extends Activatable> extends ActivatableView<R, M> {
 
     public ActivatableViewAndModel(M model) {
         super(checkNotNull(model, "Model must not be null"));

src/main/java/io/bitsquare/gui/InitializableView.java

@@ -22,8 +22,9 @@ import java.net.URL;
 import java.util.ResourceBundle;
 
 import javafx.fxml.Initializable;
+import javafx.scene.*;
 
-public abstract class InitializableView<M> extends AbstractView<M> implements Initializable {
+public abstract class InitializableView<R extends Parent, M> extends AbstractView<R, M> implements Initializable {
 
     public InitializableView(M model) {
         super(model);

src/main/java/io/bitsquare/gui/main/MainView.java

@@ -44,7 +44,7 @@ import javafx.scene.text.*;
 import static io.bitsquare.gui.Navigation.Item.*;
 import static javafx.scene.layout.AnchorPane.*;
 
-public class MainView extends ActivatableView<MainViewModel> {
+public class MainView extends ActivatableView<StackPane, MainViewModel> {
 
     public static final String TITLE_KEY = "view.title";
 
@@ -140,7 +140,7 @@ public class MainView extends ActivatableView<MainViewModel> {
 
         VBox splashScreen = createSplashScreen();
 
-        ((StackPane) root).getChildren().addAll(baseApplicationContainer, splashScreen);
+        root.getChildren().addAll(baseApplicationContainer, splashScreen);
 
         Platform.runLater(
                 () -> model.initBackend().subscribe(

src/main/java/io/bitsquare/gui/main/account/AccountView.java

@@ -17,7 +17,7 @@
 
 package io.bitsquare.gui.main.account;
 
-import io.bitsquare.gui.ActivatableViewAndModel;
+import io.bitsquare.gui.ActivatableView;
 import io.bitsquare.gui.Navigation;
 import io.bitsquare.gui.View;
 import io.bitsquare.gui.ViewLoader;
@@ -28,21 +28,20 @@ import javafx.beans.value.ChangeListener;
 import javafx.fxml.FXML;
 import javafx.scene.control.*;
 
-public class AccountView extends ActivatableViewAndModel {
+public class AccountView extends ActivatableView<TabPane, AccountViewModel> {
 
     private Navigation.Listener navigationListener;
     private ChangeListener<Tab> tabChangeListener;
 
     @FXML Tab accountSettingsTab, arbitratorSettingsTab;
 
-    private final AccountViewModel model;
     private final ViewLoader viewLoader;
     private final Navigation navigation;
 
 
     @Inject
     private AccountView(AccountViewModel model, ViewLoader viewLoader, Navigation navigation) {
-        this.model = model;
+        super(model);
         this.viewLoader = viewLoader;
         this.navigation = navigation;
     }
@@ -69,9 +68,9 @@ public class AccountView extends ActivatableViewAndModel {
     }
 
     @Override
-    public void doActivate() {
+    public void activate() {
         navigation.addListener(navigationListener);
-        ((TabPane) root).getSelectionModel().selectedItemProperty().addListener(tabChangeListener);
+        root.getSelectionModel().selectedItemProperty().addListener(tabChangeListener);
 
         if (navigation.getCurrentItems().length == 2 &&
                 navigation.getCurrentItems()[1] == Navigation.Item.ACCOUNT) {
@@ -80,7 +79,7 @@ public class AccountView extends ActivatableViewAndModel {
                         Navigation.Item.ACCOUNT_SETUP);
             }
             else {
-                if (((TabPane) root).getSelectionModel().getSelectedItem() == accountSettingsTab)
+                if (root.getSelectionModel().getSelectedItem() == accountSettingsTab)
                     navigation.navigationTo(Navigation.Item.MAIN, Navigation.Item.ACCOUNT,
                             Navigation.Item.ACCOUNT_SETTINGS);
                 else
@@ -91,9 +90,9 @@ public class AccountView extends ActivatableViewAndModel {
     }
 
     @Override
-    public void doDeactivate() {
+    public void deactivate() {
         navigation.removeListener(navigationListener);
-        ((TabPane) root).getSelectionModel().selectedItemProperty().removeListener(tabChangeListener);
+        root.getSelectionModel().selectedItemProperty().removeListener(tabChangeListener);
     }
 
 
@@ -123,7 +122,7 @@ public class AccountView extends ActivatableViewAndModel {
         arbitratorSettingsTab.setDisable(true);
 
         tab.setContent(loaded.view);
-        ((TabPane) root).getSelectionModel().select(tab);
+        root.getSelectionModel().select(tab);
         return (View) loaded.controller;
     }
 }

src/main/java/io/bitsquare/gui/main/account/arbitrator/browser/ArbitratorBrowserView.java

@@ -40,7 +40,7 @@ import javafx.scene.layout.*;
 import javafx.stage.Stage;
 
 // TODO Arbitration is very basic yet
-public class ArbitratorBrowserView extends ActivatableView implements ArbitratorListener {
+public class ArbitratorBrowserView extends ActivatableView<Pane, Void> implements ArbitratorListener {
 
     private final ViewLoader viewLoader;
     private final AccountSettings accountSettings;
@@ -95,7 +95,7 @@ public class ArbitratorBrowserView extends ActivatableView implements Arbitrator
     @Override
     protected View loadView(Navigation.Item navigationItem) {
         ViewLoader.Item loaded = viewLoader.load(navigationItem.getFxmlUrl());
-        ((Pane) root).getChildren().set(0, loaded.view);
+        root.getChildren().set(0, loaded.view);
         return arbitratorProfileView = (ArbitratorProfileView) loaded.controller;
     }
 

src/main/java/io/bitsquare/gui/main/account/arbitrator/registration/ArbitratorRegistrationView.java

@@ -48,6 +48,7 @@ import javax.inject.Inject;
 import javafx.collections.FXCollections;
 import javafx.fxml.FXML;
 import javafx.scene.control.*;
+import javafx.scene.layout.*;
 import javafx.stage.Stage;
 import javafx.util.StringConverter;
 
@@ -55,7 +56,7 @@ import de.jensd.fx.fontawesome.AwesomeDude;
 import de.jensd.fx.fontawesome.AwesomeIcon;
 
 // TODO Arbitration is very basic yet
-public class ArbitratorRegistrationView extends ActivatableView {
+public class ArbitratorRegistrationView extends ActivatableView<AnchorPane, Void> {
 
     private final Persistence persistence;
     private final WalletService walletService;

src/main/java/io/bitsquare/gui/main/account/content/changepassword/ChangePasswordView.java

@@ -31,7 +31,7 @@ import javafx.scene.layout.*;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-public class ChangePasswordView extends InitializableView<ChangePasswordViewModel> implements Wizard.Step {
+public class ChangePasswordView extends InitializableView<GridPane, ChangePasswordViewModel> implements Wizard.Step {
 
     private static final Logger log = LoggerFactory.getLogger(ChangePasswordView.class);
 

src/main/java/io/bitsquare/gui/main/account/content/fiat/FiatAccountView.java

@@ -21,9 +21,9 @@ import io.bitsquare.bank.BankAccount;
 import io.bitsquare.bank.BankAccountType;
 import io.bitsquare.gui.ActivatableViewAndModel;
 import io.bitsquare.gui.OverlayManager;
+import io.bitsquare.gui.Wizard;
 import io.bitsquare.gui.components.InputTextField;
 import io.bitsquare.gui.components.Popups;
-import io.bitsquare.gui.Wizard;
 import io.bitsquare.gui.main.help.Help;
 import io.bitsquare.gui.main.help.HelpId;
 import io.bitsquare.gui.util.validation.InputValidator;
@@ -47,14 +47,9 @@ import org.controlsfx.control.action.AbstractAction;
 import org.controlsfx.control.action.Action;
 import org.controlsfx.dialog.Dialog;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import static javafx.beans.binding.Bindings.createBooleanBinding;
 
-public class FiatAccountView extends ActivatableViewAndModel<FiatAccountViewModel> implements Wizard.Step {
+public class FiatAccountView extends ActivatableViewAndModel<GridPane, FiatAccountViewModel> implements Wizard.Step {
-
-    private static final Logger log = LoggerFactory.getLogger(FiatAccountView.class);
 
     @FXML HBox buttonsHBox;
     @FXML ComboBox<Region> regionComboBox;

src/main/java/io/bitsquare/gui/main/account/content/irc/IrcAccountView.java

@@ -42,7 +42,7 @@ import org.slf4j.LoggerFactory;
 /*
 Just temporary for giving the user a possibility to test the app via simulating the bank transfer in a IRC chat.
  */
-public class IrcAccountView extends ActivatableViewAndModel<IrcAccountViewModel> implements Wizard.Step {
+public class IrcAccountView extends ActivatableViewAndModel<GridPane, IrcAccountViewModel> implements Wizard.Step {
 
     private static final Logger log = LoggerFactory.getLogger(IrcAccountView.class);
 

src/main/java/io/bitsquare/gui/main/account/content/password/PasswordView.java

@@ -31,7 +31,7 @@ import javafx.scene.layout.*;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-public class PasswordView extends InitializableView<PasswordViewModel> implements Wizard.Step {
+public class PasswordView extends InitializableView<GridPane, PasswordViewModel> implements Wizard.Step {
 
     private static final Logger log = LoggerFactory.getLogger(PasswordView.class);
 

src/main/java/io/bitsquare/gui/main/account/content/registration/RegistrationView.java

@@ -35,12 +35,13 @@ import javax.inject.Inject;
 import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
 import javafx.scene.control.*;
+import javafx.scene.layout.*;
 
 import org.controlsfx.control.action.AbstractAction;
 import org.controlsfx.control.action.Action;
 import org.controlsfx.dialog.Dialog;
 
-public class RegistrationView extends InitializableView<RegistrationViewModel> implements Wizard.Step {
+public class RegistrationView extends InitializableView<GridPane, RegistrationViewModel> implements Wizard.Step {
 
     private final OverlayManager overlayManager;
 
@@ -110,8 +111,7 @@ public class RegistrationView extends InitializableView<RegistrationViewModel> i
                     public void handle(ActionEvent actionEvent) {
                         getProperties().put("type", "CLOSE");
                         try {
-                            if (parent instanceof Wizard)
+                            parent.nextStep(RegistrationView.this);
-                                ((Wizard) parent).nextStep(RegistrationView.this);
                         } catch (Exception e) {
                             e.printStackTrace();
                         }

src/main/java/io/bitsquare/gui/main/account/content/restrictions/RestrictionsView.java

@@ -43,7 +43,7 @@ import javafx.stage.Stage;
 import javafx.util.Callback;
 import javafx.util.StringConverter;
 
-public class RestrictionsView extends ActivatableViewAndModel<RestrictionsViewModel> implements Wizard.Step {
+public class RestrictionsView extends ActivatableViewAndModel<GridPane, RestrictionsViewModel> implements Wizard.Step {
 
     @FXML ListView<Locale> languagesListView;
     @FXML ListView<Country> countriesListView;
@@ -93,7 +93,7 @@ public class RestrictionsView extends ActivatableViewAndModel<RestrictionsViewMo
 
     @Override
     public void hideWizardNavigation() {
-        ((GridPane) root).getChildren().remove(completedButton);
+        root.getChildren().remove(completedButton);
     }
 
 

src/main/java/io/bitsquare/gui/main/account/content/seedwords/SeedWordsView.java

@@ -28,7 +28,7 @@ import javafx.fxml.FXML;
 import javafx.scene.control.*;
 import javafx.scene.layout.*;
 
-public class SeedWordsView extends InitializableView<SeedWordsViewModel> implements Wizard.Step {
+public class SeedWordsView extends InitializableView<GridPane, SeedWordsViewModel> implements Wizard.Step {
 
     private Wizard parent;
 
@@ -56,7 +56,7 @@ public class SeedWordsView extends InitializableView<SeedWordsViewModel> impleme
 
     @Override
     public void hideWizardNavigation() {
-        ((GridPane) root).getChildren().remove(completedButton);
+        root.getChildren().remove(completedButton);
     }
 
 

src/main/java/io/bitsquare/gui/main/funds/FundsView.java

@@ -17,6 +17,7 @@
 
 package io.bitsquare.gui.main.funds;
 
+import io.bitsquare.gui.Activatable;
 import io.bitsquare.gui.ActivatableViewAndModel;
 import io.bitsquare.gui.Navigation;
 import io.bitsquare.gui.View;
@@ -28,7 +29,7 @@ import javafx.beans.value.ChangeListener;
 import javafx.fxml.FXML;
 import javafx.scene.control.*;
 
-public class FundsView extends ActivatableViewAndModel {
+public class FundsView extends ActivatableViewAndModel<TabPane, Activatable> {
 
     private Navigation.Listener navigationListener;
     private ChangeListener<Tab> tabChangeListener;
@@ -67,10 +68,10 @@ public class FundsView extends ActivatableViewAndModel {
 
     @Override
     public void doActivate() {
-        ((TabPane) root).getSelectionModel().selectedItemProperty().addListener(tabChangeListener);
+        root.getSelectionModel().selectedItemProperty().addListener(tabChangeListener);
         navigation.addListener(navigationListener);
 
-        if (((TabPane) root).getSelectionModel().getSelectedItem() == transactionsTab)
+        if (root.getSelectionModel().getSelectedItem() == transactionsTab)
             navigation.navigationTo(Navigation.Item.MAIN, Navigation.Item.FUNDS, Navigation.Item.TRANSACTIONS);
         else
             navigation.navigationTo(Navigation.Item.MAIN, Navigation.Item.FUNDS, Navigation.Item.WITHDRAWAL);
@@ -78,7 +79,7 @@ public class FundsView extends ActivatableViewAndModel {
 
     @Override
     public void doDeactivate() {
-        ((TabPane) root).getSelectionModel().selectedItemProperty().removeListener(tabChangeListener);
+        root.getSelectionModel().selectedItemProperty().removeListener(tabChangeListener);
         navigation.removeListener(navigationListener);
     }
 
@@ -100,7 +101,7 @@ public class FundsView extends ActivatableViewAndModel {
                 break;
         }
         currentTab.setContent(loaded.view);
-        ((TabPane) root).getSelectionModel().select(currentTab);
+        root.getSelectionModel().select(currentTab);
         return (View) loaded.controller;
     }
 

src/main/java/io/bitsquare/gui/main/portfolio/PortfolioView.java

@@ -17,6 +17,7 @@
 
 package io.bitsquare.gui.main.portfolio;
 
+import io.bitsquare.gui.Activatable;
 import io.bitsquare.gui.ActivatableViewAndModel;
 import io.bitsquare.gui.Navigation;
 import io.bitsquare.gui.View;
@@ -29,7 +30,7 @@ import javafx.beans.value.ChangeListener;
 import javafx.fxml.FXML;
 import javafx.scene.control.*;
 
-public class PortfolioView extends ActivatableViewAndModel {
+public class PortfolioView extends ActivatableViewAndModel<TabPane, Activatable> {
 
     private Tab currentTab;
     private Navigation.Listener navigationListener;
@@ -73,7 +74,7 @@ public class PortfolioView extends ActivatableViewAndModel {
 
     @Override
     public void doActivate() {
-        ((TabPane) root).getSelectionModel().selectedItemProperty().addListener(tabChangeListener);
+        root.getSelectionModel().selectedItemProperty().addListener(tabChangeListener);
         navigation.addListener(navigationListener);
 
         if (tradeManager.getPendingTrades().size() == 0)
@@ -84,7 +85,7 @@ public class PortfolioView extends ActivatableViewAndModel {
 
     @Override
     public void doDeactivate() {
-        ((TabPane) root).getSelectionModel().selectedItemProperty().removeListener(tabChangeListener);
+        root.getSelectionModel().selectedItemProperty().removeListener(tabChangeListener);
         navigation.removeListener(navigationListener);
         currentTab = null;
     }
@@ -111,7 +112,7 @@ public class PortfolioView extends ActivatableViewAndModel {
                 break;
         }
         currentTab.setContent(loaded.view);
-        ((TabPane) root).getSelectionModel().select(currentTab);
+        root.getSelectionModel().select(currentTab);
         return (View) loaded.controller;
     }
 }

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

@@ -25,9 +25,10 @@ import javax.inject.Inject;
 import javafx.beans.property.ReadOnlyObjectWrapper;
 import javafx.fxml.FXML;
 import javafx.scene.control.*;
+import javafx.scene.layout.*;
 import javafx.util.Callback;
 
-public class ClosedTradesView extends ActivatableViewAndModel<ClosedTradesViewModel> {
+public class ClosedTradesView extends ActivatableViewAndModel<GridPane, ClosedTradesViewModel> {
 
     @FXML TableColumn<ClosedTradesListItem, ClosedTradesListItem> priceColumn, amountColumn, volumeColumn,
             directionColumn, dateColumn, tradeIdColumn;

src/main/java/io/bitsquare/gui/main/portfolio/offer/OffersView.java

@@ -27,9 +27,10 @@ import javafx.beans.property.ReadOnlyObjectWrapper;
 import javafx.fxml.FXML;
 import javafx.scene.control.*;
 import javafx.scene.image.*;
+import javafx.scene.layout.*;
 import javafx.util.Callback;
 
-public class OffersView extends ActivatableViewAndModel<OffersViewModel> {
+public class OffersView extends ActivatableViewAndModel<GridPane, OffersViewModel> {
 
     @FXML TableColumn<OfferListItem, OfferListItem> priceColumn, amountColumn, volumeColumn,
             directionColumn, dateColumn, offerIdColumn, removeItemColumn;

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

@@ -52,7 +52,7 @@ import javafx.scene.layout.*;
 import javafx.util.Callback;
 import javafx.util.StringConverter;
 
-public class PendingTradesView extends ActivatableViewAndModel<PendingTradesViewModel> {
+public class PendingTradesView extends ActivatableViewAndModel<AnchorPane, PendingTradesViewModel> {
 
     private ChangeListener<PendingTradesListItem> selectedItemChangeListener;
     private ListChangeListener<PendingTradesListItem> listChangeListener;

src/main/java/io/bitsquare/gui/main/settings/SettingsView.java

@@ -17,6 +17,7 @@
 
 package io.bitsquare.gui.main.settings;
 
+import io.bitsquare.gui.Activatable;
 import io.bitsquare.gui.ActivatableViewAndModel;
 import io.bitsquare.gui.Navigation;
 import io.bitsquare.gui.View;
@@ -29,7 +30,7 @@ import javafx.beans.value.ChangeListener;
 import javafx.fxml.FXML;
 import javafx.scene.control.*;
 
-public class SettingsView extends ActivatableViewAndModel {
+public class SettingsView extends ActivatableViewAndModel<TabPane, Activatable> {
 
     private final ViewLoader viewLoader;
     private final Navigation navigation;
@@ -71,10 +72,10 @@ public class SettingsView extends ActivatableViewAndModel {
 
     @Override
     public void doActivate() {
-        ((TabPane) root).getSelectionModel().selectedItemProperty().addListener(tabChangeListener);
+        root.getSelectionModel().selectedItemProperty().addListener(tabChangeListener);
         navigation.addListener(navigationListener);
 
-        if (((TabPane) root).getSelectionModel().getSelectedItem() == preferencesTab)
+        if (root.getSelectionModel().getSelectedItem() == preferencesTab)
             navigation.navigationTo(Navigation.Item.MAIN,
                     Navigation.Item.SETTINGS,
                     Navigation.Item.PREFERENCES);
@@ -86,7 +87,7 @@ public class SettingsView extends ActivatableViewAndModel {
 
     @Override
     public void doDeactivate() {
-        ((TabPane) root).getSelectionModel().selectedItemProperty().removeListener(tabChangeListener);
+        root.getSelectionModel().selectedItemProperty().removeListener(tabChangeListener);
         navigation.removeListener(navigationListener);
     }
 
@@ -107,7 +108,7 @@ public class SettingsView extends ActivatableViewAndModel {
                 throw new IllegalArgumentException("navigation item of type " + navigationItem + " is not allowed");
         }
         tab.setContent(loaded.view);
-        ((TabPane) root).getSelectionModel().select(tab);
+        root.getSelectionModel().select(tab);
         return (View) loaded.controller;
     }
 

src/main/java/io/bitsquare/gui/main/settings/application/PreferencesView.java

@@ -23,11 +23,12 @@ import javax.inject.Inject;
 
 import javafx.fxml.FXML;
 import javafx.scene.control.*;
+import javafx.scene.layout.*;
 
 /**
  * This UI is not cached as it is normally only needed once.
  */
-public class PreferencesView extends ActivatableViewAndModel<PreferencesViewModel> {
+public class PreferencesView extends ActivatableViewAndModel<GridPane, PreferencesViewModel> {
 
     @FXML ComboBox<String> btcDenominationComboBox;
     @FXML CheckBox useAnimationsCheckBox, useEffectsCheckBox;

src/main/java/io/bitsquare/gui/main/trade/TradeView.java

@@ -38,7 +38,7 @@ import javafx.collections.ListChangeListener;
 import javafx.scene.*;
 import javafx.scene.control.*;
 
-public class TradeView extends ActivatableView {
+public class TradeView extends ActivatableView<TabPane, Void> {
 
     private OfferBookView offerBookView;
     private CreateOfferView createOfferView;
@@ -81,7 +81,7 @@ public class TradeView extends ActivatableView {
         // We need to remove open validation error popups
         // Platform.runLater needed as focus-out event is called after selectedIndexProperty changed
         // TODO Find a way to do that in the InputTextField directly, but a tab change does not trigger any event...
-        TabPane tabPane = (TabPane) root;
+        TabPane tabPane = root;
         tabPane.getSelectionModel().selectedIndexProperty()
                 .addListener((observableValue, oldValue, newValue) ->
                         Platform.runLater(InputTextField::hideErrorMessageDisplay));
@@ -125,7 +125,7 @@ public class TradeView extends ActivatableView {
 
     @Override
     protected View loadView(Navigation.Item navigationItem) {
-        TabPane tabPane = (TabPane) root;
+        TabPane tabPane = root;
         if (navigationItem == Navigation.Item.OFFER_BOOK && offerBookView == null) {
             // Offerbook must not be cached by ViewLoader as we use 2 instances for sell and buy screens.
             ViewLoader.Item loaded = viewLoader.load(navigationItem.getFxmlUrl(), false);

src/main/java/io/bitsquare/gui/main/trade/createoffer/CreateOfferView.java

@@ -65,7 +65,7 @@ import static javafx.beans.binding.Bindings.createStringBinding;
 
 // TODO Implement other positioning method in InoutTextField to display it over the field instead of right side
 // priceAmountHBox is too large after redesign as to be used as layoutReference.
-public class CreateOfferView extends ActivatableViewAndModel<CreateOfferViewModel> {
+public class CreateOfferView extends ActivatableViewAndModel<AnchorPane, CreateOfferViewModel> {
 
     private final Navigation navigation;
     private final OverlayManager overlayManager;

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

@@ -57,7 +57,8 @@ import static javafx.beans.binding.Bindings.createStringBinding;
  * TODO: The advanced filters are not impl. yet
  * The restrictions handling is open from the concept and is only implemented for countries yet.
  */
-public class OfferBookView extends ActivatableViewAndModel<OfferBookViewModel> implements ChildView<TradeView> {
+public class OfferBookView extends ActivatableViewAndModel<GridPane, OfferBookViewModel> implements
+        ChildView<TradeView> {
 
     private final Navigation navigation;
     private final OverlayManager overlayManager;
@@ -287,7 +288,7 @@ public class OfferBookView extends ActivatableViewAndModel<OfferBookViewModel> i
     }
 
     private void toggleDetailsScreen(boolean visible) {
-        ((GridPane) root).setVgap(visible ? 5 : 0);
+        root.setVgap(visible ? 5 : 0);
 
         extendedButton1Label.setVisible(visible);
         extendedButton1Label.setManaged(visible);

src/main/java/io/bitsquare/gui/main/trade/takeoffer/TakeOfferView.java

@@ -62,7 +62,7 @@ import org.controlsfx.control.action.AbstractAction;
 import org.controlsfx.control.action.Action;
 import org.controlsfx.dialog.Dialog;
 
-public class TakeOfferView extends ActivatableViewAndModel<TakeOfferViewModel> {
+public class TakeOfferView extends ActivatableViewAndModel<AnchorPane, TakeOfferViewModel> {
 
     private final Navigation navigation;
     private final OverlayManager overlayManager;