use bindings to enable/disable 'Save' and 'Close' menu/toobar item and add asterisk to tab

Author	Karl Tauber <email>
Date	2015-07-23 16:07:37 GMT+0200
Commit	d29b160453c95ed61e53b2f4eec9e2c111189df2
Parent	a0a29a7

src/main/java/org/markdownwriterfx/FileEditor.java

		import java.nio.file.Files;
		import java.nio.file.Path;
		+import javafx.beans.binding.Bindings;
		import javafx.beans.property.ObjectProperty;
		+import javafx.beans.property.ReadOnlyBooleanProperty;
		+import javafx.beans.property.ReadOnlyBooleanWrapper;
		import javafx.beans.property.SimpleObjectProperty;
		import javafx.scene.control.Alert;

		FileEditor(Path path) {
		this.path.set(path);
		- this.path.addListener((observable, oldPath, newPath) -> updateTab());

		// avoid that this is GCed
		tab.setUserData(this);

		+ this.path.addListener((observable, oldPath, newPath) -> updateTab());
		+ this.modified.addListener((observable, oldPath, newPath) -> updateTab());
		updateTab();


		}

		- // path property
		+ // 'path' property
		private final ObjectProperty<Path> path = new SimpleObjectProperty<>();
		Path getPath() { return path.get(); }
		void setPath(Path path) { this.path.set(path); }
		ObjectProperty<Path> pathProperty() { return path; }
		+
		+ // 'modified' property
		+ private final ReadOnlyBooleanWrapper modified = new ReadOnlyBooleanWrapper();
		+ boolean isModified() { return modified.get(); }
		+ ReadOnlyBooleanProperty modifiedProperty() { return modified; }

		private void updateTab() {
		Path path = this.path.get();
		- tab.setText((path != null) ? path.getFileName().toString() : "Untitled");
		+ String text = (path != null) ? path.getFileName().toString() : "Untitled";
		+ if (isModified())
		+ text = "*".concat(text);
		+ tab.setText(text);
		tab.setTooltip((path != null) ? new Tooltip(path.toString()) : null);
		}

		// bind preview to editor
		markdownPreviewPane.markdownASTProperty().bind(markdownEditorPane.markdownASTProperty());
		+
		+ // bind the editor undo manager to the 'modified' property
		+ modified.bind(Bindings.not(markdownEditorPane.getUndoManager().atMarkedPositionProperty()));

		SplitPane splitPane = new SplitPane(markdownEditorPane.getNode(), markdownPreviewPane.getNode());

		String markdown = new String(Files.readAllBytes(path));
		markdownEditorPane.setMarkdown(markdown);
		+ markdownEditorPane.getUndoManager().mark();
		} catch (IOException ex) {
		Alert alert = new Alert(AlertType.ERROR);

		try {
		Files.write(path.get(), markdown.getBytes());
		+ markdownEditorPane.getUndoManager().mark();
		return true;
		} catch (IOException ex) {

src/main/java/org/markdownwriterfx/MainWindow.java

		import java.util.List;
		import javafx.application.Platform;
		+import javafx.beans.binding.Bindings;
		+import javafx.beans.property.BooleanProperty;
		+import javafx.beans.property.ObjectProperty;
		+import javafx.beans.property.SimpleBooleanProperty;
		+import javafx.beans.property.SimpleObjectProperty;
		import javafx.event.ActionEvent;
		import javafx.event.Event;

		private final BorderPane borderPane = new BorderPane();
		private final TabPane tabPane = new TabPane();
		+
		+ private final ObjectProperty<FileEditor> activeFileEditor = new SimpleObjectProperty<>();
		+ private final BooleanProperty activeModified = new SimpleBooleanProperty();

		public MainWindow() {
		borderPane.setPrefSize(800, 800);
		borderPane.setTop(new VBox(createMenuBar(), createToolBar()));
		borderPane.setCenter(tabPane);

		tabPane.setTabClosingPolicy(TabClosingPolicy.ALL_TABS);
		+ tabPane.getSelectionModel().selectedItemProperty().addListener((observable, oldTab, newTab) -> {
		+ if (newTab != null) {
		+ activeFileEditor.set((FileEditor) newTab.getUserData());
		+ activeModified.bind(activeFileEditor.get().modifiedProperty());
		+ } else {
		+ activeFileEditor.set(null);
		+ activeModified.unbind();
		+ activeModified.set(false);
		+ }
		+ });

		fileNew();

		MenuItem fileCloseMenuItem = createMenuItem("Close", "Shortcut+W", null, e -> fileClose());
		MenuItem fileExitMenuItem = createMenuItem("Exit", null, null, e -> fileExit());
		+
		+ fileSaveMenuItem.disableProperty().bind(Bindings.not(activeModified));
		+ fileCloseMenuItem.disableProperty().bind(activeFileEditor.isNull());

		Menu fileMenu = new Menu("File", null,

		Button fileOpenButton = createToolBarButton(FOLDER_OPEN_ALT, "Open", "Shortcut+O", e -> fileOpen());
		Button fileSaveButton = createToolBarButton(FLOPPY_ALT, "Save", "Shortcut+S", e -> fileSave());
		+
		+ fileSaveButton.disableProperty().bind(Bindings.not(activeModified));

		return new ToolBar(

src/main/java/org/markdownwriterfx/editor/MarkdownEditorPane.java

		import javafx.scene.Node;
		import org.fxmisc.richtext.StyleClassedTextArea;
		+import org.fxmisc.undo.UndoManager;
		import org.pegdown.Extensions;
		import org.pegdown.PegDownProcessor;

		}

		- // markdown property
		+ public UndoManager getUndoManager() {
		+ return textArea.getUndoManager();
		+ }
		+
		+ // 'markdown' property
		public String getMarkdown() { return textArea.getText(); }
		public void setMarkdown(String markdown) { textArea.replaceText(markdown); }
		public ObservableValue<String> markdownProperty() { return textArea.textProperty(); }

		- // markdownAST property
		+ // 'markdownAST' property
		public RootNode getMarkdownAST() { return markdownAST.get(); }
		public ReadOnlyObjectProperty<RootNode> markdownASTProperty() { return markdownAST.getReadOnlyProperty(); }

Delta	50 lines added, 5 lines removed, 45-line increase