JavaFx之不通过全局静态变量进行窗体通信
百度了n多窗体通信,,,总是通过定义全局静态变量进行传值通信。。我个人不喜欢一个controller里写满所有的布局(这样显得臃肿,但是组件传值方便)。有没有另外的办法进行模块化并且可以传值呢。。
肯定是有的。。。
1.定义一个泛型类接收Controller对象与Stage对象
- 1 public class StageAndController<C, S> {
- 2 private C controller;
- 3 private S stage;
- 4
- 5 public StageAndController(C controller, S stage) {
- 6 this.controller = controller;
- 7 this.stage = stage;
- 8 }
- 9 public StageAndController(C controller) {
- 10 this.controller = controller;
- 11 }
- 12
- 13 public C getController() {
- 14 return controller;
- 15 }
- 16
- 17 public void setController(C controller) {
- 18 this.controller = controller;
- 19 }
- 20
- 21 public S getStage() {
- 22 return stage;
- 23 }
- 24
- 25 public void setStage(S stage) {
- 26 this.stage = stage;
- 27 }
- 28 }
这里之所以返回两个对象,,首先每个controller都对应一个打开的布局窗体,controller用来传值、赋值、初始化操作,stage本身需要调用show()才显示,,所以定义此类
2.封装 打开一个窗体或者动态加载一个Node
- 1 public static StageAndController addMenu(final Pane pane, final String fxmlName, Object controller) {
- 2 URL location = AddOperation.class.getResource("/fxml/" + fxmlName);
- 3 FXMLLoader fxmlLoader = new FXMLLoader();
- 4 fxmlLoader.setLocation(location);
- 5 fxmlLoader.setBuilderFactory(new JavaFXBuilderFactory());
- 6 try {
- 7 Node node = fxmlLoader.load();//返回Node对象 Node是布局顶级父类,再之上就是Object,所有此处可以加载一个布局添加到父级中
- 8 pane.getChildren().add(node);//Node添加到父级布局
- 9 controller = fxmlLoader.getController();//获取加载布局的Contrller对象
- 10 } catch (IOException e) {
- 11 e.printStackTrace();
- 12 }
- 13 return new StageAndController(controller);//返回controller实例
- 14 }
- //pane->需要添加node的父级Pane及Pane子类对象 fxmlName-->自定义的布局文件 Object-->需要实例化的Controller
这里我的用法是动态增加一排菜单栏,使用了到了controller传值作用,用法如下:
- StageAndController controller = AddOperation.addMenu(operation, "read_item.fxml", ReadCardController.class);
- readCardController = (ReadCardController) controller.getController();
向父级窗体暴露了一个Controller实例对象,就可以进行父窗体向子组件传值,初始化。
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- 1 public static StageAndController newDialog(String fxmlName, String title, Object controller) {
- 2 URL location = OpenDialog.class.getResource("/fxml/" + fxmlName);
- 3 FXMLLoader fxmlLoader = new FXMLLoader();
- 4 fxmlLoader.setLocation(location);
- 5 fxmlLoader.setBuilderFactory(new JavaFXBuilderFactory());
- 6 Stage stage = new Stage();
- 7 try {
- 8 Pane dialogPane = fxmlLoader.load();
- 9 stage.setScene(new Scene(dialogPane));
- 10 stage.initModality(Modality.APPLICATION_MODAL);
- 11 stage.initStyle(StageStyle.DECORATED);
- 12 stage.setResizable(false);
- 13 if (title != null) {
- 14 stage.setTitle(title);
- 15 }
- 16 controller = fxmlLoader.getController();
- 17
- 18 } catch (IOException e) {
- 19 e.printStackTrace();
- 20 }
- 21 return new StageAndController(controller, stage);
此处同理,加载的是一个窗体布局,同时设置模态化(本身未关闭,父级窗体不可点击)、动态标题,,,,,返回一个Controller与Stage对象,,,用法如下:
- StageAndController stageAndController = OpenDialog.newDialog("connectDevice.fxml", "连接", ConnectDevice.class);
- ConnectDevice controller = (ConnectDevice) stageAndController.getController();
- Stage stage = (Stage) stageAndController.getStage();
- controller.str= str;
- controller.init();
- stage.show();
窗体显示之前父窗体向子窗体传值或者做一些初始化。 这样模块化布局传值也变得简单好维护。
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嫌弃自带窗体风格太丑,,可以往下看。。
自定义Stage窗体布局(State设置透明时):
- public static StageAndController customDialog(String fxmlName, Object controller, Pane pane, String css) {
- URL location = OpenDialog.class.getResource("/fxml/" + fxmlName);
- FXMLLoader fxmlLoader = new FXMLLoader();
- fxmlLoader.setLocation(location);
- fxmlLoader.setBuilderFactory(new JavaFXBuilderFactory());
- Stage stage = new Stage();
- try {
- pane = fxmlLoader.load();
- Background background = new Background(new BackgroundFill(Paint.valueOf("#EFEFEF"), new CornerRadii(15), new Insets(0)));
- pane.setBackground(background);
- pane.setBorder(new Border(new BorderStroke(Color.valueOf("#0096C9"), BorderStrokeStyle.SOLID, new CornerRadii(15), new BorderWidths(2))));
- Scene scene = new Scene(pane);
- if (css != null) {
- scene.getStylesheets().add(OpenDialog.class.getResource("/css/" + css).toExternalForm());
- }
- scene.setFill(Paint.valueOf("#FFFFFF00"));//设置场景透明
- stage.initModality(Modality.APPLICATION_MODAL);
- stage.initStyle(StageStyle.TRANSPARENT);
- stage.setResizable(false);
- stage.setScene(scene);
- controller = fxmlLoader.getController();
- } catch (IOException e) {
- e.printStackTrace();
- }
- return new StageAndController(controller, stage);
- }
用法差不多,加了一个自定义加载css样式,可以按需更改,,不过自定义时,,窗体头部拖动就不可用,下面贴出解决方案:
- 1 public class DragListener implements EventHandler<MouseEvent> {
- 2
- 3 private double xOffset = 0;
- 4 private double yOffset = 0;
- 5 private final Stage stage;
- 6
- 7 public DragListener(Stage stage) {
- 8 this.stage = stage;
- 9 }
- 10
- 11 @Override
- 12 public void handle(MouseEvent event) {
- 13 event.consume();
- 14 if (event.getEventType() == MouseEvent.MOUSE_PRESSED) {
- 15 xOffset = event.getSceneX();
- 16 yOffset = event.getSceneY();
- 17 } else if (event.getEventType() == MouseEvent.MOUSE_DRAGGED) {
- 18 stage.setX(event.getScreenX() - xOffset);
- 19 if(event.getScreenY() - yOffset < 0) {
- 20 stage.setY(0);
- 21 }else {
- 22 stage.setY(event.getScreenY() - yOffset);
- 23 }
- 24 }
- 25 }
- 26
- 27 public void enableDrag(Node node) {
- 28 node.setOnMousePressed(this);
- 29 node.setOnMouseDragged(this);
- 30 }
- 31 }
用法如下:
- 1 StageAndController stageAndController = OpenDialog.customDialog("connectDevice_cus.fxml",ConnectDevice.class,new Pane(),null);
- 2 ConnectDevice controller = (ConnectDevice) stageAndController.getController();
- 3 Stage stage = (Stage) stageAndController.getStage();
- 4 new DragListener(stage).enableDrag(controller.title);//自定义窗口时设置拖动监听 此处controller.title是我自定义窗体标题栏的HBox对象
- 5 controller.stage = stage;
- 6 controller.init();
- 7 stage.show();
这样就可以愉快的使用自定义弹窗了。。。。
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