🐛 finish copying and adapting exam2's correction

.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/misc.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" project-jdk-name="18" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="jpab" />
+  </component>
+</project>

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/Butterflies2.iml" filepath="$PROJECT_DIR$/Butterflies2.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

Butterflies2.iml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_X" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="jfx-18.0.1" level="application" />
+  </component>
+</module>

resources/fxml/MainWindow.fxml

@@ -27,7 +27,7 @@
                 </AnchorPane>
                 <HBox spacing="5">
                     <ColorPicker fx:id="colorPicker"/>
-                    <Button disable="${colorsLV.selectionModel.selectedIndex == minus1}"
+                    <Button disable="${colorsLV.selectionModel.selectedIndex != minus1}"
                             onAction="#clickAddColors" text="Add colors"/>
                     <Button disable="${colorsLV.selectionModel.selectedIndex == minus1}"
                             onAction="#clickUnselectColor" text="Unselect"/>
@@ -44,7 +44,8 @@
         <MenuBar>
             <Menu text="Butterflies">
                 <MenuItem onAction="#clickAddButterfly" text="Add"/>
-                <MenuItem onAction="#clickRemoveButterfly" text="Delete"/>
+                <MenuItem disable="${butterfliesLV.selectionModel.selectedIndex == minus1}"
+                          onAction="#clickRemoveButterfly" text="Delete"/>
                 <SeparatorMenuItem/>
                 <MenuItem onAction="#clickQuit" text="Quit"/>
             </Menu>

src/data/Loadable.java

@@ -1,5 +1,5 @@
 package data;
 
 public interface Loadable<T> {
-    public T load();
+    T load();
 }

src/data/Stub.java

@@ -9,15 +9,6 @@ public class Stub implements Loadable<ButterflyManager> {
     public ButterflyManager load() {
         ButterflyManager result = new ButterflyManager();
 
-        Butterfly jerry = new Butterfly("Jerry");
-        jerry.addColor(50, 100, 150);
-        jerry.addColor(20, 0, 240);
-
-        Butterfly tony = new Butterfly("Tony");
-        tony.addColor(50, 100, 150);
-        tony.addColor(150, 0, 150);
-        tony.addColor(0, 100, 0);
-
         result.addButterfly("Jerry");
         result.getButterflies().get(0).addColor(50, 100, 150);
         result.getButterflies().get(0).addColor(150, 0, 150);

src/launcher/Launcher.java

@@ -11,7 +11,7 @@ import java.util.Objects;
 public class Launcher extends Application {
     @Override
     public void start(Stage primaryStage) throws Exception {
-        Parent root = FXMLLoader.load(getClass().getResource("/fxml/MainWindow.fxml"));
+        Parent root = FXMLLoader.load(Objects.requireNonNull(getClass().getResource("/fxml/MainWindow.fxml")));
         Scene scene = new Scene(root);
         primaryStage.setScene(scene);
         primaryStage.show();

src/view/CreationWindow.java

@@ -27,6 +27,6 @@ public class CreationWindow {
     }
 
     public String getButterflyName() {
-        return null;
+        return butterflyName;
     }
 }

src/view/MainWindow.java

@@ -33,9 +33,9 @@ public class MainWindow {
         if (colorPicker.getValue() != null) {
             butterfliesLV.getSelectionModel()
                          .getSelectedItem()
-                         .addColor((int) (colorPicker.getValue().getRed()),
-                                   (int) (colorPicker.getValue().getGreen()),
-                                   (int) (colorPicker.getValue().getBlue()));
+                         .addColor((int) (colorPicker.getValue().getRed() * 255),
+                                   (int) (colorPicker.getValue().getGreen() * 255),
+                                   (int) (colorPicker.getValue().getBlue()) * 255);
         }
     }
 
@@ -61,13 +61,10 @@ public class MainWindow {
         Stage creationWindowStage = new Stage();
         creationWindowStage.initOwner(butterfliesLV.getScene().getWindow());
         creationWindowStage.initModality(Modality.WINDOW_MODAL);
-
         CreationWindow controller = initCreationWindow(creationWindowStage);
-
         if (controller.getButterflyName() != null) {
             mgr.addButterfly(controller.getButterflyName());
         }
-
     }
 
     private CreationWindow initCreationWindow(Stage creationWindowStage) {
@@ -76,10 +73,9 @@ public class MainWindow {
         loader.setController(controller);
         try {
             creationWindowStage.setScene(new Scene(loader.load()));
+            creationWindowStage.showAndWait();
         } catch (IOException ex) {
-            new Alert(Alert.AlertType.ERROR,
-                      "error while opening creation window",
-                      ButtonType.OK).setHeaderText(null);
+            new Alert(Alert.AlertType.ERROR, "error while opening creation window", ButtonType.OK).setHeaderText(null);
         }
         return controller;
     }