java JavaFX - BorderPane/StackPane 在子项更改后未调整大小

JavaFX - BorderPane/StackPane not resizing after children changed

提问by remery

I am having a resize issue when content is added and removed from a JavaFX BorderPane. The BorderPane content is not being resized until the window is manually resized. I have written a small test app to model this behavior. The application builds a BorderPane that contains a rectangle embedded within a StackPane at the center of the BorderPane. Along the bottom of the BorderPane there is a VBox and HBox that contain text and a separator. There is a menu item that removes the content from the bottom of the BorderPane (MoveText -> Right) and adds similar content to the right position of the BorderPane.

在 JavaFX BorderPane 添加和删除内容时，我遇到了调整大小问题。在手动调整窗口大小之前，不会调整 BorderPane 内容的大小。我编写了一个小型测试应用程序来模拟这种行为。该应用程序构建一个 BorderPane，其中包含一个嵌入在 BorderPane 中心的 StackPane 中的矩形。沿着 BorderPane 的底部有一个 VBox 和 HBox，其中包含文本和分隔符。有一个菜单项可以移除 BorderPane 底部的内容（MoveText -> Right），并将类似的内容添加到 BorderPane 的右侧位置。

When the text is added to the right position of the BorderPane, the rectangle overlaps the text. In otherwords the content of the BorderPane center is overlapping the content in the BorderPane right.

当文本添加到 BorderPane 的正确位置时，矩形与文本重叠。换句话说，BorderPane 中心的内容与 BorderPane 右侧的内容重叠。

I saw the following link - https://stackoverflow.com/questions/5302197/javafx-bug-is-there-a-way-to-force-repaint-this-is-not-a-single-threading-prCalling requestLayout does not seem to help. I have also tried calling impl_updatePG and impl_transformsChanged on various nodes in the graph. I got this idea from this thread - https://forums.oracle.com/forums/thread.jspa?threadID=2242083

我看到下面的链接- https://stackoverflow.com/questions/5302197/javafx-bug-is-there-a-way-to-force-repaint-this-is-not-a-single-threading-pr调用requestLayout 似乎没有帮助。我还尝试在图中的各个节点上调用 impl_updatePG 和 impl_transformsChanged 。我从这个线程中得到了这个想法 - https://forums.oracle.com/forums/thread.jspa?threadID=2242083

public class BorderPaneExample extends Application
{
   private BorderPane root;
   private StackPane centerPane;

   @Override
   public void start(Stage primaryStage) throws Exception
   {
      root = new BorderPane();
      root.setTop(getMenu());
      root.setBottom(getBottomVBox());
      centerPane = getCenterPane();
      root.setCenter(centerPane);

      Scene scene = new Scene(root, 900, 500);
      primaryStage.setTitle("BorderPane Example");
      primaryStage.setScene(scene);
      primaryStage.show();
   }

   private MenuBar getMenu()
   {
      MenuBar menuBar = new MenuBar();

      MenuItem rightMenuItem = new MenuItem("Right");
      rightMenuItem.setOnAction(new EventHandler<ActionEvent>() {
         @Override
         public void handle(ActionEvent actionEvent) {
            root.setRight(getRightHBox());
            root.setBottom(null);
            root.requestLayout();
         }
      });
      MenuItem bottomMenuItem = new MenuItem("Bottom");
      bottomMenuItem.setOnAction(new EventHandler<ActionEvent>() {
         @Override
         public void handle(ActionEvent actionEvent) {
            root.setRight(null);
            root.setBottom(getBottomVBox());
         }
      });

      Menu menu = new Menu("Move text");
      menu.getItems().add(rightMenuItem);
      menu.getItems().add(bottomMenuItem);
      menuBar.getMenus().addAll(menu);

      return menuBar;
   }

   private HBox getRightHBox()
   {
      HBox hbox = new HBox();

      VBox vbox = new VBox(50);
      vbox.setPadding(new Insets(0, 20, 0, 20));
      vbox.setAlignment(Pos.CENTER);

      vbox.getChildren().addAll(new Text("Additional Info 1"),
        new Text("Additional Info 2"), new Text("Additional Info 3"));
      hbox.getChildren().addAll(new Separator(Orientation.VERTICAL), vbox); 

      return hbox;
   }

   private VBox getBottomVBox()
   {
      VBox vbox = new VBox();

      HBox hbox = new HBox(20);
      hbox.setPadding(new Insets(5));
      hbox.setAlignment(Pos.CENTER);

      hbox.getChildren().addAll(new Text("Footer Item 1")
            , new Text("Footer Item 2"), new Text("Footer Item 3"));
      vbox.getChildren().addAll(new Separator(), hbox);

      return vbox;
   }

   private StackPane getCenterPane()
   {
      StackPane stackPane = new StackPane();
      stackPane.setAlignment(Pos.CENTER);

      final Rectangle rec = new Rectangle(200, 200);
      rec.setFill(Color.DODGERBLUE);
      rec.widthProperty().bind(stackPane.widthProperty().subtract(50));
      rec.heightProperty().bind(stackPane.heightProperty().subtract(50));

      stackPane.getChildren().addAll(rec);

      return stackPane;
   }

   public static void main(String[] args)
   {
      Application.launch(args);
   }
}

Any suggestions would be appreciated. Thanks

任何建议，将不胜感激。谢谢

回答by Nick Rippe

For the sake of having an answer:

为了得到答案：

The StackPaneneeds to have its minimum size set in order to do clipping. So if you explicitly add stackPane.setMinSize(0, 0);to the getCenterPane()method, it should fix your problem.

该StackPane需求有其最小尺寸设置，以便做剪辑。因此，如果您明确添加stackPane.setMinSize(0, 0);到该getCenterPane()方法中，它应该可以解决您的问题。

So your getCenterPane()method would now look like this:

所以你的getCenterPane()方法现在看起来像这样：

private StackPane getCenterPane()
{
  StackPane stackPane = new StackPane();
  stackPane.setMinSize(0, 0);
  stackPane.setAlignment(Pos.CENTER);

  final Rectangle rec = new Rectangle(200, 200);
  rec.setFill(Color.DODGERBLUE);
  rec.widthProperty().bind(stackPane.widthProperty().subtract(50));
  rec.heightProperty().bind(stackPane.heightProperty().subtract(50));

  stackPane.getChildren().addAll(rec);

  return stackPane;
}