Question

当我移动圆圈时，文本不会重新定位。

这是我的代码：

Text t = new Text(x,y, "HELLO");
Circle c = new Circle(x,y,radius);

t.xProperty().bind(c.centerXProperty());
t.yProperty().bind(c.centerYProperty());

完整代码：

package netfx;  



import java.util.HashMap;
import java.util.Optional;
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Cursor;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextInputDialog;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.HBox;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.text.Text;
import javafx.scene.text.TextBoundsType;
import javafx.stage.Stage;

class RouterView  extends Group {
    private String name;
    private double x;
    private double y;
    private double radius;




    public void Routerview() {

    }
    RouterView(String n, double x, double y, double r){
        this.name = n;
        this.x = x;
        this.y = y;
        this.radius = r;


    }


}

class LinkView {
    private String name;
    private RouterView src;
    private RouterView dst;


    public void EdgeView() {
    }
    public void EdgeView(String name, RouterView s, RouterView d) {
        this.name = name;
        this.src = s;
        this.dst = d;
    }
}

 public class NetFX extends Application {    
    Circle circle_Red, circle_Green, circle_Blue;
    double orgSceneX, orgSceneY;
    double orgTranslateX, orgTranslateY;



    HashMap<String, RouterView> routers = new HashMap<String, RouterView>();
    HashMap<String, LinkView> links = new HashMap<String, LinkView>();
    HBox hBox = new HBox(); 
    Group root = new Group();



    public String getRouterName(String msg){
        TextInputDialog dialog = new TextInputDialog(" Router Name ");
        dialog.setTitle("Router Name");
        dialog.setHeaderText("Topology manager");
        dialog.setContentText(msg);
        Optional<String> result = dialog.showAndWait();         

            if (result.isPresent()){
                return result.get();
            }
            return null;         

    }


    @Override
    public void start(Stage primaryStage) {     
        hBox.setSpacing(10.0);
        Button addBtn  = new Button("ADD NODE");
        addBtn.setOnAction((event) -> { 
            String name = getRouterName("Enter Router Name: ");
            if (name != null) {
                AddRouter(name, 300,300,60);                             
                primaryStage.show();
            }
        });

        Button delBtn  = new Button("ADD EDGE");
        delBtn.setOnAction((event) -> { 
            String sname = getRouterName("Enter Source Router: ");
            RouterView sp = routers.get(sname);
            System.out.println(sname+" = "+sp);
            if (sp != null) {
                String dname = getRouterName("Enter Destination Router: ");
                RouterView dp = routers.get(dname);
                System.out.println(dname+" = "+dp);
                if (dp != null) {
                    //EdgeView e = AddEdge(sp,dp);
                    //edges.put(sname+"-"+dname,e);
                    primaryStage.show();
                }
            }
        });



        Button saveBtn = new Button("SAVE TOPOLOGY");                
        Button exitBtn = new Button("EXIT");
        exitBtn.setOnAction((event) -> { System.exit(0);});


        hBox.setPadding(new Insets(0, 20, 10, 20)); 
        hBox.getChildren().addAll(addBtn,delBtn,saveBtn, exitBtn);                        
        root.getChildren().addAll(hBox);         
        //primaryStage.setResizable(false);
        primaryStage.setScene(new Scene(root, 400,350));         
        primaryStage.setTitle("TOPOLOGY MANAGER");
        primaryStage.show();
    }

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


    public void AddRouter(String name, double x, double y, double r){       
        RouterView router = new RouterView(name,x,y,r);
        Circle c = new Circle(r, Color.GREEN);        
        c.setCenterX(x);
        c.setCenterY(y);
        Text t = new Text(x-10, y, name);                          
        c.setOnMousePressed(circleOnMousePressedEventHandler);
        c.setOnMouseDragged(circleOnMouseDraggedEventHandler);
        c.centerXProperty().bind(t.xProperty());
        c.centerYProperty().bind(t.yProperty());  

        root.getChildren().addAll(c,t);
        routers.put(name,router);    
    }


    public void AddEdge(){

    }


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

        @Override
        public void handle(MouseEvent t) {
            orgSceneX = t.getSceneX();
            orgSceneY = t.getSceneY();
            orgTranslateX = ((Circle)(t.getSource())).getTranslateX();
            orgTranslateY = ((Circle)(t.getSource())).getTranslateY();
            System.out.println("orgSceneX = "+orgSceneX);
            System.out.println("orgSceneY = "+orgSceneY);
            System.out.println("orgTranslateX = "+orgTranslateX);
            System.out.println("orgTranslateY = "+orgTranslateY);
        }
    };

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

        @Override
        public void handle(MouseEvent t) {
            double offsetX = t.getSceneX() - orgSceneX;
            double offsetY = t.getSceneY() - orgSceneY;
            double newTranslateX = orgTranslateX + offsetX;
            double newTranslateY = orgTranslateY + offsetY;
            System.out.println("offsetX = "+offsetX);
            System.out.println("offsetY = "+offsetY);
            System.out.println("newTranslateX = "+newTranslateX);
            System.out.println("newTranslateY = "+newTranslateY);

            ((Circle)(t.getSource())).setTranslateX(newTranslateX);
            ((Circle)(t.getSource())).setTranslateY(newTranslateY);            
        }
    };
}

Answer 1

文本的位置绑定到圆圈的centerX和centerY属性。但是，当您移动圆圈时，不会更改这些属性：您可以通过更改translateX和translateY属性来移动它。

更改centerX和centerY属性，而不是translateX和translateY属性：

EventHandler<MouseEvent> circleOnMousePressedEventHandler = t -> {
    orgSceneX = t.getSceneX();
    orgSceneY = t.getSceneY();
    orgTranslateX = ((Circle)(t.getSource())).getCenterX();
    orgTranslateY = ((Circle)(t.getSource())).getCenterY();
    System.out.println("orgSceneX = "+orgSceneX);
    System.out.println("orgSceneY = "+orgSceneY);
    System.out.println("orgTranslateX = "+orgTranslateX);
    System.out.println("orgTranslateY = "+orgTranslateY);

};

EventHandler<MouseEvent> circleOnMouseDraggedEventHandler = t -> {
    double offsetX = t.getSceneX() - orgSceneX;
    double offsetY = t.getSceneY() - orgSceneY;
    double newTranslateX = orgTranslateX + offsetX;
    double newTranslateY = orgTranslateY + offsetY;
    System.out.println("offsetX = "+offsetX);
    System.out.println("offsetY = "+offsetY);
    System.out.println("newTranslateX = "+newTranslateX);
    System.out.println("newTranslateY = "+newTranslateY);

    ((Circle)(t.getSource())).setCenterX(newTranslateX);
    ((Circle)(t.getSource())).setCenterY(newTranslateY);            

};

javafx绑定圈子与文本，所以当我移动圆圈时，文本随之移动

1 个答案: