使用自定义列表单元的JavaFX [英] JavaFX using a custom listcell

问题描述

我试图弄清楚如何在JavaFX中将CustomListCell与ListView一起使用，但是没有运气，我查了一下，发现的全部都是不完整的教程和问题.以下是我的CustomListCell FXML

I have trying to figure out how to use a CustomListCell with a ListView in JavaFX but no luck, I have looked up and all I can find are incomplete tutorials and questions. Below is my CustomListCell FXML

  <AnchorPane id="AnchorPane" styleClass="backPane" 
       stylesheets="@../css/mainwindow.css" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1">
  <children>
  <HBox alignment="CENTER_LEFT" styleClass="backPane">
     <children>
        <HBox styleClass="card" HBox.hgrow="ALWAYS">
           <children>
              <ImageView fitHeight="150.0" fitWidth="200.0" pickOnBounds="true" preserveRatio="true">
                 <image>
                    <Image url="@../images/picture_placeholder.png" />
                 </image>
              </ImageView>
              <VBox HBox.hgrow="ALWAYS">
                 <children>
                    <Label fx:id="lbTitle" styleClass="fixture-title" stylesheets="@../css/mainwindow.css" text=" Livingston 19:45 Falkirk" />
                    <Label fx:id="lbDescription" styleClass="fixture-description" text="Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin at turpis nisl. Interdum et malesuada fames ac ante ipsum primis in faucibus. Vestibulum laoreet elementum velit. Curabitur tincidunt finibus malesuada. Aliquam dapibus semper scelerisque. Sed tristique tellus eget sem ornare cursus." />
                 </children></VBox>
           </children>
           <HBox.margin>
              <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
           </HBox.margin>
        </HBox>
       </children>
      </HBox>
      </children>
    </AnchorPane>

还有我的模特

public class Ticket {


private long id;
private String imageUrl;
private String title;
private String description;

public Ticket(long id, String imageUrl, String title, String description) {
    this.id = id;
    this.imageUrl = imageUrl;
    this.title = title;
    this.description = description;
}

public long getId() {
    return id;
}

public void setId(long id) {
    this.id = id;
}

public String getImageUrl() {
    return imageUrl;
}

public void setImageUrl(String imageUrl) {
    this.imageUrl = imageUrl;
}

public String getTitle() {
    return title;
}

public void setTitle(String title) {
    this.title = title;
}

public String getDescription() {
    return description;
}

public void setDescription(String description) {
    this.description = description;
}

}

还有我不完整的CustomListCell

public class TicketCell <Ticket> extends ListCell<Ticket> { 

private final TicketCellController ticketCellController = new TicketCellController();
private final Node view = ticketCellController.getView();

@Override
protected void updateItem(Ticket item, boolean empty) {
    super.updateItem(item, empty);
    if (empty) {
        setGraphic(null);
    } else {
        ticketCellController.setTicket(item);
        setGraphic(view);
    }
} 
}

还有我的控制器

public class TicketCellController implements Initializable{

private static final String TAG = MainWindowController.class.getSimpleName();
private Logger logger;
private Ticket ticket;
@FXML
private Label lbTitle;
@FXML
private Label lbDescription;
@FXML
private AnchorPane anchorPane;



@Override
public void initialize(URL url, ResourceBundle rb) {
  logger = Logger.getLogger(MainWindowController.class);
    BasicConfigurator.configure();  
} 

请不要未找到ticketCellController.getView().现在迷路了，我不知道在我的CustomListCell FXML中更新imageview和标签的正确方法.任何需要帮助的人或有我可以关注的教程的链接的人，我将不胜感激.

Please not that ticketCellController.getView() is not being found. Am lost at this point, I donnot know the right way of updating the imageview and labels on in my CustomListCell FXML. Anyone to help or with a link to a tutorial I can follow, I will appreciate.

推荐答案

设置方式，实例化控制器并从中获取视图的过程中，控制器需要加载fxml并能够返回它创建的视图.像这样:

The way you have things set up, where you are instantiating the controller and getting the view from it, your controller needs to load the fxml and be able to return the view it creates. So something like:

public class TicketCellController {

    private Ticket ticket;
    @FXML
    private Label lbTitle;
    @FXML
    private Label lbDescription;

    private AnchorPane anchorPane;

    public TicketCellController() {

        try {
            // assumes FXML file is in same package as this controller
            // (also make sure name of FXML resource is correct)
            FXMLLoader loader = new FXMLLoader(getClass().getResource("CustomListCell.fxml"));
            loader.setController(this);
            anchorPane = loader.load();
        } catch (IOException exc) {
            // pretty much fatal here...
            throw new UncheckedIOException(exc);
        }
    }

    public void setTicket(Ticket ticket) {
        lbTitle.setText(ticket.getTitle());
        lbDescription.setText(ticket.getDescription());
    }

    public Node getView() {
        return anchorPane ;
    }

    // ...

}

这里是考试班；这适用于上面的控制器类以及您的FXML，CustomListCell类和模型类(请注意，我从FXML中删除了样式表和图像，因为我无法访问它们):

Here is a test class; this works with the controller class above and with your FXML, CustomListCell class, and model class as-is (with the caveat that I removed the stylesheets and images from the FXML, as I do not have access to those):

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.ListView;
import javafx.stage.Stage;

public class Test extends Application {

    @Override
    public void start(Stage primaryStage) {
        ListView<Ticket> ticketList = new ListView<Ticket>();
        ticketList.setCellFactory(lv -> new TicketCell());
        for (int i = 1 ; i <= 50 ; i++) {
            ticketList.getItems().add(new Ticket(i, "", "Ticket "+i, "This is a description of ticket "+i));
        }
        primaryStage.setScene(new Scene(ticketList, 600, 400));
        primaryStage.show();
    }

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

这篇关于使用自定义列表单元的JavaFX的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！