Added editor stubs in viewModel

src/main/java/org/gecko/viewmodel/AutomatonEditorViewModel.java

@@ -0,0 +1,7 @@
+package org.gecko.viewmodel;
+
+public class AutomatonEditorViewModel extends EditorViewModel {
+    public AutomatonEditorViewModel(SystemViewModel currentSystem) {
+        super(currentSystem);
+    }
+}

src/main/java/org/gecko/viewmodel/EditorViewModel.java

@@ -0,0 +1,36 @@
+package org.gecko.viewmodel;
+
+import javafx.beans.property.Property;
+import javafx.beans.value.ObservableObjectValue;
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
+import javafx.geometry.Point2D;
+import lombok.Getter;
+import lombok.Setter;
+import org.gecko.tools.Tool;
+
+import java.util.List;
+
+@Getter @Setter
+public abstract class EditorViewModel {
+    private Property<Point2D> pivot;
+    private Property<Double> zoomScale;
+    private ObservableObjectValue<Tool> currentTool;
+    private ObservableObjectValue<PositionableViewModelElement<?>> focusedElement;
+    private final SystemViewModel currentSystem;
+    private final ObservableList<PositionableViewModelElement<?>> containedPositionableViewModelElements;
+    private List<Tool> tools;
+    private SelectionManager selectionManager;
+
+    protected EditorViewModel(SystemViewModel systemViewModel) {
+        currentSystem = systemViewModel;
+        containedPositionableViewModelElements = FXCollections.observableArrayList();
+        //TODO stub
+    }
+
+    public List<RegionViewModel> getRegionViewModels(StateViewModel stateViewModel) {
+        //TODO stub
+        return null;
+    }
+
+}

src/main/java/org/gecko/viewmodel/GeckoViewModel.java

@@ -1,4 +1,31 @@
 package org.gecko.viewmodel;
 
+import javafx.beans.property.ListProperty;
+import javafx.beans.property.SimpleListProperty;
+import javafx.beans.value.ObservableObjectValue;
+import lombok.Getter;
+import lombok.Setter;
+import org.gecko.model.Element;
+import org.gecko.model.GeckoModel;
+
+import java.util.HashMap;
+
+@Getter @Setter
 public class GeckoViewModel {
+    private final HashMap<Element, PositionableViewModelElement<?>> modelToViewModel;
+    private final GeckoModel geckoModel;
+    private final ViewModelFactory viewModelFactory;
+    private ObservableObjectValue<EditorViewModel> currentEditor;
+    private final ListProperty<EditorViewModel> openedEditors;
+
+    public GeckoViewModel(GeckoModel geckoModel) {
+        modelToViewModel = new HashMap<>();
+        this.geckoModel = geckoModel;
+        viewModelFactory = new ViewModelFactory(this, geckoModel.getModelFactory());
+        openedEditors = new SimpleListProperty<>();
+    }
+
+    public void switchEditor(SystemViewModel nextSystemViewModel, boolean isAutomatonEditor) {
+        //TODO stub
+    }
 }

src/main/java/org/gecko/viewmodel/PositionableViewModelElementVisitor.java

@@ -0,0 +1,10 @@
+package org.gecko.viewmodel;
+
+public interface PositionableViewModelElementVisitor {
+    void visit(SystemViewModel systemViewModel);
+    void visit(RegionViewModel regionViewModel);
+    void visit(SystemConnectionViewModel systemConnectionViewModel);
+    void visit(EdgeViewModel edgeViewModel);
+    void visit(StateViewModel stateViewModel);
+    void visit(PortViewModel portViewModel);
+}

src/main/java/org/gecko/viewmodel/SelectionManager.java

@@ -0,0 +1,37 @@
+package org.gecko.viewmodel;
+
+import javafx.collections.ObservableList;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.util.List;
+import java.util.Stack;
+
+@Getter @Setter
+public class SelectionManager {
+    private Stack<List<PositionableViewModelElement<?>>> undoSelectionStack;
+    private Stack<List<PositionableViewModelElement<?>>> redoSelectionStack;
+    private ObservableList<PositionableViewModelElement<?>> currentSelection;
+
+    public void goBack() {
+        //TODO stub
+    }
+    public void goForward() {
+        //TODO stub
+    }
+    public void select(PositionableViewModelElement<?> element) {
+        //TODO stub
+    }
+    public void select(List<PositionableViewModelElement<?>> elements) {
+        //TODO stub
+    }
+    public void deselect(PositionableViewModelElement<?> element) {
+        //TODO stub
+    }
+    public void deselect(List<PositionableViewModelElement<?>> elements) {
+        //TODO stub
+    }
+    public void deselectAll() {
+        //TODO stub
+    }
+}

src/main/java/org/gecko/viewmodel/SystemEditorViewModel.java

@@ -0,0 +1,7 @@
+package org.gecko.viewmodel;
+
+public class SystemEditorViewModel extends EditorViewModel{
+    public SystemEditorViewModel(SystemViewModel currentSystem) {
+        super(currentSystem);
+    }
+}

src/main/java/org/gecko/viewmodel/ViewModelFactory.java

@@ -0,0 +1,71 @@
+package org.gecko.viewmodel;
+
+import org.gecko.model.*;
+import org.gecko.model.System;
+
+public class ViewModelFactory {
+    private final ModelFactory modelFactory;
+    private final GeckoViewModel geckoViewModel;
+
+    public ViewModelFactory(GeckoViewModel geckoViewModel, ModelFactory modelFactory) {
+        this.geckoViewModel = geckoViewModel;
+        this.modelFactory = modelFactory;
+    }
+    public EditorViewModel createEditorViewModel(SystemViewModel systemViewModel, boolean isAutomatonEditor) {
+        //TODO stub
+        return null;
+    }
+    public StateViewModel createStateViewModelIn(SystemViewModel parentSystem) {
+        //TODO stub
+        return null;
+    }
+    public StateViewModel createStateViewModelFrom(State state) {
+        //TODO stub
+        return null;
+    }
+    public EdgeViewModel createEdgeViewModelIn(SystemViewModel parentSystem) {
+        //TODO stub
+        return null;
+    }
+    public EdgeViewModel createEdgeViewModelFrom(Edge edge) {
+        //TODO stub
+        return null;
+    }
+    public SystemConnectionViewModel createSystemConnectionViewModelIn(SystemViewModel parentSystem) {
+        //TODO stub
+        return null;
+    }
+    public SystemConnectionViewModel createSystemConnectionViewModelFrom(SystemConnection systemConnection) {
+        //TODO stub
+        return null;
+    }
+    public SystemViewModel createSystemViewModelIn(SystemViewModel parentSystem) {
+        //TODO stub
+        return null;
+    }
+    public SystemViewModel createSystemViewModelFrom(System system) {
+        //TODO stub
+        return null;
+    }
+    public RegionViewModel createRegionViewModelIn(SystemViewModel parentSystem) {
+        //TODO stub
+        return null;
+    }
+    public RegionViewModel createRegionViewModelFrom(Region region) {
+        //TODO stub
+        return null;
+    }
+    public PortViewModel createPortViewModelIn(SystemViewModel systemViewModel) {
+        //TODO stub
+        return null;
+    }
+    public PortViewModel createPortViewModelFrom(Variable variable) {
+        //TODO stub
+        return null;
+    }
+    public ContractViewModel createContractViewModelIn(StateViewModel stateViewModel) {
+        //TODO stub
+        return null;
+    }
+
+}