javafx - ドラッグ中に角丸四角形の描画に失敗する

Question

マウスをドラッグしながら、javafx で角の丸い単純な長方形を描画しようとしています。最初の問題: 左上隅を丸くすることができません。2 番目の問題: アプリケーションで、写真の 2 番目の長方形とは異なり、完全に丸みを帯びた長方形を描画できるようにしたいと考えています。どうすればこれらを修正できますか? よろしくお願いします。

これが私のコードです：

import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.BorderPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class Main extends Application {
  public static void main(String[] args) {
      launch(args);
  }

  public void start(Stage stage){
      stage.setTitle("Test");        
      root = new BorderPane();     
      Scene scene = new Scene(root, 400, 400);
      paintings = new Group();
      stage.setScene(scene);

      canvas = new Rectangle(0, 0, stage.getScene().getWidth(), stage.getScene().getHeight());
      canvas.setFill(Color.WHITE);

      addHandlers();

      root.setCenter(canvas);  
      root.getChildren().add(paintings);
      stage.show();
   }

  private void paintRectangle(){
      roundedRect = new Rectangle(pressedX, 
                    pressedY, 
                    draggedX - pressedX, 
                    draggedY - pressedY);
      roundedRect.setFill(Color.RED);
      roundedRect.setArcHeight(40);
      roundedRect.setArcWidth(40);        
      paintings.getChildren().add(roundedRect);
  }

  private void addHandlers(){
     canvas.setOnMousePressed(new EventHandler<MouseEvent>() {

          @Override
          public void handle(MouseEvent me) {                
              pressedX = me.getX();
              pressedY = me.getY();
          }
      });

     canvas.setOnMouseReleased(new EventHandler<MouseEvent>() {

          @Override
          public void handle(MouseEvent me) {                
              /* If I make the drawing in here, I get round corners, but it doesn't get drawn while dragging*/
              //paintRectangle();
          }
      });

      canvas.setOnMouseDragged(new EventHandler<MouseEvent>() {

          @Override
          public void handle(MouseEvent me) {                
              draggedX =  me.getX();
              draggedY =  me.getY();
              paintRectangle();

          }
      });
  }
  double pressedX, pressedY;
  double draggedX, draggedY;
  Rectangle canvas;
  Group paintings;
  Rectangle roundedRect;
  BorderPane root;

}

そして、ここに私の写真があります：

Answer 1

私はあなたのコードを調べることができませんでしたが、別のアプローチがあります。これをコードにマージできます。

import javafx.application.Application;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.BorderPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class Daer extends Application {

    BorderPane pane;
    Rectangle rect;
    SimpleDoubleProperty rectinitX = new SimpleDoubleProperty();
    SimpleDoubleProperty rectinitY = new SimpleDoubleProperty();
    SimpleDoubleProperty rectX = new SimpleDoubleProperty();
    SimpleDoubleProperty rectY = new SimpleDoubleProperty();

    @Override
    public void start(Stage stage) {

        pane = new BorderPane();
        Scene scene = new Scene(pane, 800, 600);
        stage.setScene(scene);

        scene.setOnMouseDragged(mouseHandler);
        scene.setOnMousePressed(mouseHandler);
        scene.setOnMouseReleased(mouseHandler);

        rect = getNewRectangle();
        rect.widthProperty().bind(rectX.subtract(rectinitX));
        rect.heightProperty().bind(rectY.subtract(rectinitY));
        pane.getChildren().add(rect);
        stage.show();
    }

    EventHandler<MouseEvent> mouseHandler = new EventHandler<MouseEvent>() {

        @Override
        public void handle(MouseEvent mouseEvent) {

            if (mouseEvent.getEventType() == MouseEvent.MOUSE_PRESSED) {
                rect.setX(mouseEvent.getX());
                rect.setY(mouseEvent.getY());
                rectinitX.set(mouseEvent.getX());
                rectinitY.set(mouseEvent.getY());
            } else if (mouseEvent.getEventType() == MouseEvent.MOUSE_DRAGGED) {
                rectX.set(mouseEvent.getX());
                rectY.set(mouseEvent.getY());
            } else if (mouseEvent.getEventType() == MouseEvent.MOUSE_RELEASED) {
                // Clone the rectangle
                Rectangle r = getNewRectangle();
                r.setX(rect.getX());
                r.setY(rect.getY());
                r.setWidth(rect.getWidth());
                r.setHeight(rect.getHeight());
                pane.getChildren().add(r);

                // Hide the rectangle
                rectX.set(0);
                rectY.set(0);
            }
        }
    };

    private Rectangle getNewRectangle() {
        Rectangle r = new Rectangle();
        r.setFill(Color.web("blue", 0.1));
        r.setStroke(Color.BLUE);
        r.setArcHeight(40);
        r.setArcWidth(40);
        return r;
    }

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