The UI is built using JavaFX Scene Builder.

Command-line executables call executable classes that parse the arguments and call the same Java methods as the interface.

Scene Builder creates the musicxmltasks.fxml file that describes the component parts, and maps interface widgets to method calls.

Invoked methods are in class TasksController. On button press, method buttonPressed() is invoked which sets up the TaskExecutor in a new thread.

@FXML private void buttonPressed(ActionEvent actionEvent) { taskForm.clearOutput(); Button button = (Button)actionEvent.getSource(); // Run task in thread TaskExecutor taskExecutor = new TaskExecutor(button.getId(), taskForm); Runnable taskRunnable = taskExecutor::execute; Thread formThread = new Thread(taskRunnable); formThread.start(); }

TaskExecutor resolves which button is pressed, handles the input, calls the executable, and handles state updates in a separate thread.

public void execute() { InputHandler inputHandler = null; JavafxTaskInitializer taskInitializer = null; boolean isPropertiesSettingsUpdate = false; boolean isLyPdfPropertiesUpdate = false; boolean isDbUpdate = false; boolean isOutputSettingsUpdate = false; switch (controlId) { case FormNode.SAVE_DB_SETTINGS_BUTTON: taskInitializer = new SaveDbSettingsInitializer(taskForm); inputHandler = new SetDbPropertiesHandler(); isPropertiesSettingsUpdate = true; break; case FormNode.SAVE_LY_PDF_SETTINGS_BUTTON: taskInitializer = new LyPdfSettingsInitializer(taskForm); inputHandler = new SetLyPdfPropertiesHandler(); isPropertiesSettingsUpdate = true; isLyPdfPropertiesUpdate = true; break; case FormNode.SAVE_OUTPUT_SETTINGS_BUTTON: taskInitializer = new OutputSettingsInitializer(taskForm); inputHandler = new SetOutputPropertiesHandler(); isPropertiesSettingsUpdate = true; isOutputSettingsUpdate = true; break; case FormNode.EXECUTE_DB_ACTIONS_BUTTON: taskInitializer = new DbTablesInitializer(taskForm); inputHandler = new DatabaseHandler(); break; case FormNode.EXECUTE_VALIDATE_BUTTON: taskInitializer = new ValidateXmlInitializer(taskForm); inputHandler = new ValidateXmlHandler(); break; case FormNode.EXECUTE_CONVERT_BUTTON: taskInitializer = new ConvertInitializer(taskForm); switch (taskForm.getFromSelection()) { case TaskConstants.CONVERSION_TYPE_MUSICXML: switch (taskForm.getToSelection()) { case TaskConstants.CONVERSION_TYPE_DATABASE: inputHandler = new MusicXml2DbHandler(); isDbUpdate = true; break; case TaskConstants.CONVERSION_TYPE_LILYPOND: inputHandler = new MusicXml2LyHandler(); break; case TaskConstants.CONVERSION_TYPE_PDF: inputHandler = new MusicXml2PdfHandler(); break; } break; case TaskConstants.CONVERSION_TYPE_DATABASE: switch (taskForm.getToSelection()) { case TaskConstants.CONVERSION_TYPE_MUSICXML: inputHandler = new Db2MusicXmlHandler(); break; case TaskConstants.CONVERSION_TYPE_LILYPOND: inputHandler = new Db2LyHandler(); break; case TaskConstants.CONVERSION_TYPE_PDF: inputHandler = new Db2PdfHandler(); break; } break; case TaskConstants.CONVERSION_TYPE_LILYPOND: if (TaskConstants.CONVERSION_TYPE_PDF.equals(taskForm.getToSelection())) { inputHandler = new Ly2PdfHandler(); } break; } break; case FormNode.EXECUTE_DELETE_BUTTON: taskInitializer = new DeleteScoreInitializer(taskForm); inputHandler = new DeleteScoreHandler(); isDbUpdate = true; break; } try { if (taskInitializer != null && inputHandler != null) { taskForm.disableNodes(true); taskInitializer.initializeNodeMap(); MusicXmlTask musicXmlTask = new MusicXmlTask(taskInitializer, inputHandler); musicXmlTask.execute(); if (isPropertiesSettingsUpdate) Platform.runLater(PropertiesHandler::addLocalPropertiesBundle); if (isLyPdfPropertiesUpdate) Platform.runLater(() -> taskForm.handleLyPdfUpdates()); if (isDbUpdate) Platform.runLater(() -> {taskForm.handleDisplayUpdates();}); if (isOutputSettingsUpdate) Platform.runLater(() -> taskForm.resetOutputStream()); } System.err.println("Task finished successfully"); } catch (TaskException e) { System.err.println("Task exited with exception"); System.err.println(e.getMessage()); } finally { taskForm.disableNodes(false); } }