camera controls help

src/main/java/fr/ill/ics/n3d/gui/EditorMenuBar.java

@@ -9,6 +9,7 @@ import java.util.logging.Logger;
 
 import fr.ill.ics.n3d.Nomad3DEditor;
 import fr.ill.ics.n3d.io.Nomad3DExporter;
+import fr.ill.ics.n3d.io.Nomad3DImporter;
 import fr.ill.ics.n3d.model.Axis;
 import fr.ill.ics.n3d.model.Component;
 import fr.ill.ics.n3d.model.ConfigParams;
@@ -23,6 +24,7 @@ import javafx.collections.ObservableList;
 import javafx.collections.transformation.SortedList;
 import javafx.event.ActionEvent;
 import javafx.event.EventHandler;
+import javafx.geometry.HPos;
 import javafx.geometry.Insets;
 import javafx.geometry.Point3D;
 import javafx.geometry.Pos;
@@ -35,7 +37,6 @@ import javafx.scene.control.CheckMenuItem;
 import javafx.scene.control.ColorPicker;
 import javafx.scene.control.ComboBox;
 import javafx.scene.control.Label;
-import javafx.scene.control.ListCell;
 import javafx.scene.control.ListView;
 import javafx.scene.control.Menu;
 import javafx.scene.control.MenuBar;
@@ -45,6 +46,7 @@ import javafx.scene.control.Tab;
 import javafx.scene.control.TabPane;
 import javafx.scene.control.TextField;
 import javafx.scene.control.TreeView;
+import javafx.scene.image.ImageView;
 import javafx.scene.input.KeyCode;
 import javafx.scene.input.KeyCodeCombination;
 import javafx.scene.input.KeyCombination;
@@ -74,6 +76,9 @@ public class EditorMenuBar extends MenuBar {
 	
 	/** Selection menu. */
 	private Menu selection;
+	
+	/** Help menu. */
+	private Menu help;
 
 	/** Components' axes visibility. */
 	private boolean showAxes;
@@ -975,7 +980,61 @@ public class EditorMenuBar extends MenuBar {
         		new SeparatorMenuItem(),
         		markWallItem, markPartsItem);
         
-        this.getMenus().addAll(this.file, this.edit, this.view, this.selection);
+        this.help = new Menu("Help");
+        MenuItem cameraHelpItem = new MenuItem("Camera");
+        cameraHelpItem.setOnAction(event -> {
+			GridPane scenePane = new GridPane();
+			scenePane.setVgap(5);
+			scenePane.setHgap(10);
+			scenePane.setAlignment(Pos.CENTER);
+			scenePane.setPrefSize(500, 200);
+
+			Scene helpScene = new Scene(scenePane);
+			Stage helpStage = new Stage(StageStyle.UTILITY);
+			helpStage.setTitle("Camera controls help");
+			helpStage.setScene(helpScene);
+			helpStage.initOwner(Nomad3DEditor.getInstance().getStage());
+			
+			double viewWidth = 80;
+			ImageView mouseLeftView = new ImageView(Nomad3DImporter.createImage("img/mouse_left.png"));
+			mouseLeftView.setFitWidth(viewWidth);
+			mouseLeftView.setPreserveRatio(true);
+			ImageView mouseRightView = new ImageView(Nomad3DImporter.createImage("img/mouse_right.png"));
+			mouseRightView.setFitWidth(viewWidth);
+			mouseRightView.setPreserveRatio(true);
+			ImageView mouseMiddleView = new ImageView(Nomad3DImporter.createImage("img/mouse_middle.png"));
+			mouseMiddleView.setFitWidth(viewWidth);
+			mouseMiddleView.setPreserveRatio(true);
+			ImageView mouseScrollUpView = new ImageView(Nomad3DImporter.createImage("img/mouse_scroll_up.png"));
+			mouseScrollUpView.setFitWidth(viewWidth);
+			mouseScrollUpView.setPreserveRatio(true);
+			ImageView mouseScrollDownView = new ImageView(Nomad3DImporter.createImage("img/mouse_scroll_down.png"));
+			mouseScrollDownView.setFitWidth(viewWidth);
+			mouseScrollDownView.setPreserveRatio(true);
+			scenePane.addRow(0, mouseLeftView, mouseRightView, mouseMiddleView, mouseScrollUpView, mouseScrollDownView);
+			
+			Label mouseLeftLabel = new Label("Rotate/translate\ncomponents");
+			GridPane.setHalignment(mouseLeftLabel, HPos.CENTER);
+			mouseLeftLabel.setTextAlignment(TextAlignment.CENTER);
+			Label mouseRightLabel = new Label("Translate\ncamera");
+			GridPane.setHalignment(mouseRightLabel, HPos.CENTER);
+			mouseRightLabel.setTextAlignment(TextAlignment.CENTER);
+			Label mouseMiddleLabel = new Label("Rotate\ncamera");
+			GridPane.setHalignment(mouseMiddleLabel, HPos.CENTER);
+			mouseMiddleLabel.setTextAlignment(TextAlignment.CENTER);
+			Label mouseScrollUpLabel = new Label("Zoom in");
+			GridPane.setHalignment(mouseScrollUpLabel, HPos.CENTER);
+			mouseScrollUpLabel.setTextAlignment(TextAlignment.CENTER);
+			Label mouseScrollDownLabel = new Label("Zoom out");
+			GridPane.setHalignment(mouseScrollDownLabel, HPos.CENTER);
+			mouseScrollDownLabel.setTextAlignment(TextAlignment.CENTER);
+			scenePane.addRow(1, mouseLeftLabel, mouseRightLabel, mouseMiddleLabel, mouseScrollUpLabel, mouseScrollDownLabel);
+			
+			helpStage.show();
+        });
+        this.help.getItems().addAll(cameraHelpItem);
+        
+        this.getMenus().addAll(this.file, this.edit, this.view, this.selection, this.help);
 	}
 	
 	private Component selectComponent(String title) {