How can i force cursor to stay in place on window when dragging an Undecorated Stage

问题:

I'm trying to create gui calculator with an undecorated stage. I added an Hbox as the title bar and set gave it an onClicked/OnDragged methods to move the primary stage around when dragged, however it doesn't seem to work perfectly. because

1) When i press and start dragging, the mouse cursor moves to the top left corner of the window as you can see below. The method i used is from here

X IMAGES:

When i click on middle of Hbox

Where the cursor moves when i start dragging

X Here is my main class

public void start(Stage primaryStage) throws Exception {       Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));       Scene mainSCENE = new Scene(root);     mainSCENE.getStylesheets().add(this.getClass().getResource("calculator.css").toExternalForm());     mainSCENE.setFill(Color.TRANSPARENT);      primaryStage.initStyle(StageStyle.TRANSPARENT);     primaryStage.setResizable(false);     primaryStage.setScene(mainSCENE);       mainWindow = primaryStage;      primaryStage.show(); } 

X and here are the methods i used in my Controller class to add the draggable effect

public class Controller {  @FXML Circle btnCLOSE;  @FXML Circle btnMINIMIZE;  @FXML HBox hboxTitleBar; private double xOffset = 0; private double yOffset = 0;   public void handle(MouseEvent event) throws IOException, LineUnavailableException, UnsupportedAudioFileException {      // Plays click audio when buttons are clicked     AudioInputStream audioIn = AudioSystem.getAudioInputStream(getClass().getResource("click.wav"));     Clip clip = AudioSystem.getClip();     clip.open(audioIn);     clip.start();      // Add functionality to minimize/close buttons     btnCLOSE.addEventHandler(MouseEvent.MOUSE_CLICKED, event1 -> System.exit(0));     btnMINIMIZE.addEventHandler(MouseEvent.MOUSE_CLICKED, event1 -> Main.mainWindow.setIconified(true)); }   // Makes the UNDECORATED window draggable from the title bar Hbox public void setOnClicked(MouseEvent event) {      System.out.println("CLICKED");     xOffset = Main.mainWindow.getX() - event.getScreenX();     yOffset = Main.mainWindow.getY() - event.getScreenY(); }  public void setOnDragged(MouseEvent event) {      Main.mainWindow.setX(event.getScreenX() + xOffset);     Main.mainWindow.setY(event.getScreenY() + yOffset); } } 

How can i lock the cursor in place when dragging?

2) When i click the close/minimize buttons that are inside the HBox, it also drags the window. Is there a way to prevent that?

回答1:

To facilitate the movement of your entire window you need two events, (Press/ Drag), the action starts when you press the bar, by initializing the position of (xOffset, yOffset), I think if i'm not mistaken the error you have made Is that you used the screen rather than the scene Here is the solution to your first problem :

//Use Press Event instead of Click Event xOffset = event.getSceneX(); yOffset = event.getSceneY();  //Drag Event window.setX(event.getScreenX() - xOffset); window.setY(event.getScreenY() - yOffset); 

for the second problem, you can add your close button outside the layout this is for me the simplest solution.

文章来源: How can i force cursor to stay in place on window when dragging an Undecorated Stage