删除鼠标事件处理程序 JavaFX

Question

我有一个响应鼠标的代码，例如当我进入一个图像区域时，图像变暗，当我退出它时，它变得正常，问题是当我运行代码时，我有 9 张图片，当鼠标移到第一张图片上时它变暗，当它移到另一张图片上时，第一张图片再次变暗而第二张图片不变。

代码如下：

public class FrameController implements Initializable {

@FXML
private GridPane album;
ImageView im;

/**
 * Initializes the controller class.
 */
@Override
public void initialize(URL url, ResourceBundle rb) {
    // TODO
}

@FXML
private void mouseEntered(MouseEvent event) {
    im = (ImageView) event.getSource();
    System.out.println("Entered: " + im.getId());
    im.setOnMouseEntered(new EventHandler<MouseEvent>() {

        @Override
        public void handle(MouseEvent event) {
            ColorAdjust ca = new ColorAdjust();
            ca.setBrightness(-0.5);
            im.setEffect(ca);
            }
        });
    }
    @FXML
    private void mouseExited(MouseEvent event) {
        im = (ImageView) event.getSource();
        System.out.println("Exited: " + im.getId());
        im.setOnMouseExited(new EventHandler<MouseEvent>() {

            @Override
            public void handle(MouseEvent event) {
                im.setEffect(null);
                System.out.println("normal");
            }
        });
    }

}

Answer 1

我需要检查你的 fxml，但你的代码中有一个基本错误。您需要删除 onMouseEntered() 和 onMouseExit().

的重复使用

试试

@FXML
private void mouseEntered(MouseEvent event) {
    im = (ImageView) event.getSource();
    System.out.println("Entered: " + im.getId());
    ColorAdjust ca = new ColorAdjust();
    ca.setBrightness(-0.5);
    im.setEffect(ca);
}

@FXML
private void mouseExited(MouseEvent event) {
    im = (ImageView) event.getSource();
    System.out.println("Exited: " + im.getId());
    im.setEffect(null);
}

删除鼠标事件处理程序 JavaFX

Remove mouse event handler JavaFX

javafx