在JavaFX中拖动未修饰的舞台

Question

这是我使用JavaFX的第二天，如果这似乎是一个太常见的知识问题的话。提前谢谢大家。

// Main Class/ Method

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
import javafx.stage.StageStyle;

public class Fxmltableview extends Application {

    public static String pageSource = "fxml_tableview.fxml";
    public static Scene scene;

    @Override
    public void start(Stage stage) throws Exception {
        stage.initStyle(StageStyle.UNDECORATED);
        stage.initStyle(StageStyle.TRANSPARENT);

        Parent root = FXMLLoader.load(getClass().getResource(pageSource));

        scene = new Scene(root, Color.TRANSPARENT);

        stage.setScene(scene);
        stage.show();
    }

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

..

// The Controller

import javafx.application.Platform;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;

public class FXMLTableViewController {
    @FXML private TableView<Person> tableView;
    @FXML private TextField firstNameField;
    @FXML private TextField lastNameField;
    @FXML private TextField emailField;

    @FXML
    protected void addPerson (ActionEvent event) {
        ObservableList<Person> data = tableView.getItems();
        data.add(new Person(
                firstNameField.getText(),
                lastNameField.getText(),
                emailField.getText()
                ));

        firstNameField.setText("");
        lastNameField.setText("");
        emailField.setText("");   
    }

    public void WindowClose (ActionEvent event) {
            Platform.exit();
    }
}

Answer 1

战略

在start方法中已经有了对stage的引用。

您需要的是能够将stage传递给控制器，这样控制器就可以使stage可以被给定的节点拖动。

stage.initStyle(StageStyle.UNDECORATED);
stage.initStyle(StageStyle.TRANSPARENT);

FXMLLoader loader = new FXMLLoader(
  getClass().getResource(
    "fxml_tableview.fxml"
  )
);

stage.setScene(
  new Scene(
    (Parent) loader.load()
  )
);

FXMLTableViewController controller = 
  loader.<FXMLTableViewController>getController();
controller.registerStage(stage);

stage.show();

@FXML private Rectangle dragNode;

public void registerStage(Stage stage) {
  EffectUtilities.makeDraggable(stage, dragNode)
}

effectUtilities.makedRaggable()来自我前面链接的示例代码。

更新fxml_tableview.fxml文件，以包括控制器中引用的所需新dragnode。

交替实现

import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Cursor;
import javafx.scene.Node;
import javafx.scene.input.MouseEvent;
import javafx.stage.Stage;
import javafx.util.Duration;

/** Various utilities for applying different effects to nodes. */
public class EffectUtilities {
  /** makes a stage draggable using a given node */
  public static void makeDraggable(final Stage stage, final Node byNode) {
    final Delta dragDelta = new Delta();
    byNode.setOnMousePressed(new EventHandler<MouseEvent>() {
      @Override public void handle(MouseEvent mouseEvent) {
        // record a delta distance for the drag and drop operation.
        dragDelta.x = stage.getX() - mouseEvent.getScreenX();
        dragDelta.y = stage.getY() - mouseEvent.getScreenY();
        byNode.setCursor(Cursor.MOVE);
      }
    });
    byNode.setOnMouseReleased(new EventHandler<MouseEvent>() {
      @Override public void handle(MouseEvent mouseEvent) {
        byNode.setCursor(Cursor.HAND);
      }
    });
    byNode.setOnMouseDragged(new EventHandler<MouseEvent>() {
      @Override public void handle(MouseEvent mouseEvent) {
        stage.setX(mouseEvent.getScreenX() + dragDelta.x);
        stage.setY(mouseEvent.getScreenY() + dragDelta.y);
      }
    });
    byNode.setOnMouseEntered(new EventHandler<MouseEvent>() {
      @Override public void handle(MouseEvent mouseEvent) {
        if (!mouseEvent.isPrimaryButtonDown()) {
          byNode.setCursor(Cursor.HAND);
        }
      }
    });
    byNode.setOnMouseExited(new EventHandler<MouseEvent>() {
      @Override public void handle(MouseEvent mouseEvent) {
        if (!mouseEvent.isPrimaryButtonDown()) {
          byNode.setCursor(Cursor.DEFAULT);
        }
      }
    });
  }

  /** records relative x and y co-ordinates. */
  private static class Delta {
    double x, y;
  }
}