如何剪辑和调整javafx borderpane的大小

1 回答

• 0

  您没有指定要执行的操作 . 你为什么要剪辑内容？你描述它的方式就是一些被剪裁的背景 . 你可以用各种机制来做到这一点，例如： G . CSS .

  或者你可以使用适当的父母，e . G . a ScrollPane以限制区域或e . G . ImageViewPane为了适应：

  import javafx.application.Application;
  import javafx.beans.property.ObjectProperty;
  import javafx.beans.property.SimpleObjectProperty;
  import javafx.beans.value.ChangeListener;
  import javafx.beans.value.ObservableValue;
  import javafx.geometry.HPos;
  import javafx.geometry.Pos;
  import javafx.geometry.VPos;
  import javafx.scene.Scene;
  import javafx.scene.control.Button;
  import javafx.scene.image.Image;
  import javafx.scene.image.ImageView;
  import javafx.scene.layout.BorderPane;
  import javafx.scene.layout.Region;
  import javafx.scene.layout.StackPane;
  import javafx.scene.shape.Rectangle;
  import javafx.stage.Stage;
  
  public class ImageApp extends Application {
      private BorderPane root;
      private Rectangle clipRect;
      private ImageView iv;
      private StackPane leftPane;
      private StackPane rightPane;
      private Button topButton;
      private Button leftButton;
      private Button rightButton;
  
      @Override
      public void start(Stage primaryStage) {
          root = new BorderPane();
          Scene primaryScene = new Scene(root, 900, 800);
          initializePrimaryStage(primaryStage, primaryScene);
          initializeFrameContent(root, topButton, leftButton);
          initializeContent(root);
          primaryStage.show();
      }
  
      private void initializeFrameContent(BorderPane root, Button topButton, Button leftButton) {
  
          topButton = new Button("TOP");
          leftButton = new Button("LEFT");
          rightButton = new Button("RIGHT");
  
          leftPane = new StackPane(leftButton);
          leftPane.setAlignment(Pos.TOP_LEFT);
  
          rightPane = new StackPane(rightButton);
          rightPane.setAlignment(Pos.TOP_RIGHT);
  
          root.setLeft(leftPane);
          root.setTop(topButton);
          root.setRight(rightButton);
      }
  
      private void initializePrimaryStage(Stage primaryStage, Scene   primaryScene) {
          primaryStage.setTitle("Image Clip Test");
          primaryStage.setScene(primaryScene);
          primaryStage.setWidth(400);
          primaryStage.setHeight(300);
          primaryStage.minWidthProperty().setValue(400);
          primaryStage.minHeightProperty().setValue(300);
      }
  
      public static void main(String[] args) {
          launch(args);
  
      }
  
      private void initializeContent(BorderPane root) {
  
          Image image = new Image(
                  "http://www.ciee.org/study-abroad/images/cities/0020/headers/desktop/big-ben-london-traffic-trafalgar-abroad-studies.jpg"
          );
          iv = new ImageView(image);
  
          // ImageViewPane content = new ImageViewPane( iv);
          ScrollPane content = new ScrollPane( imageView);
  
          // hide scrollbars
          content.setVbarPolicy(ScrollPane.ScrollBarPolicy.NEVER);
          content.setHbarPolicy(ScrollPane.ScrollBarPolicy.NEVER);
          content.setPadding(Insets.EMPTY);
  
          root.setCenter(content);
      }
  
  
      // code from here: https://stackoverflow.com/questions/22993550/how-to-resize-an-image-when-resizing-the-window-in-javafx
      class ImageViewPane extends Region {
  
          private ObjectProperty<ImageView> imageViewProperty = new SimpleObjectProperty<ImageView>();
  
          public ObjectProperty<ImageView> imageViewProperty() {
              return imageViewProperty;
          }
  
          public ImageView getImageView() {
              return imageViewProperty.get();
          }
  
          public void setImageView(ImageView imageView) {
              this.imageViewProperty.set(imageView);
          }
  
          public ImageViewPane() {
              this(new ImageView());
          }
  
          @Override
          protected void layoutChildren() {
              ImageView imageView = imageViewProperty.get();
              if (imageView != null) {
                  imageView.setFitWidth(getWidth());
                  imageView.setFitHeight(getHeight());
                  layoutInArea(imageView, 0, 0, getWidth(), getHeight(), 0, HPos.CENTER, VPos.CENTER);
              }
              super.layoutChildren();
          }
  
          public ImageViewPane(ImageView imageView) {
              imageViewProperty.addListener(new ChangeListener<ImageView>() {
  
                  @Override
                  public void changed(ObservableValue<? extends ImageView> arg0, ImageView oldIV, ImageView newIV) {
                      if (oldIV != null) {
                          getChildren().remove(oldIV);
                      }
                      if (newIV != null) {
                          getChildren().add(newIV);
                      }
                  }
              });
              this.imageViewProperty.set(imageView);
          }
      }
  }
  

  回复于 2024-05-10T06:30:19+08:00