將按鈕放入表格列更優雅

Question

這是一個SSCCE，演示如何將Button放入TableView列。它的工作原理，但很少有不愉快的行爲。當通過鼠標使用滾動條向下滾動表格行時，新渲染的按鈕不會立即顯示。只有當鼠標被釋放然後移動時才顯示它們。我認爲還有另一種更優雅的方式來顯示錶格欄中的按鈕，並在點擊時選擇與選定行相關的東西。有什麼建議麼？

import javafx.application.Application; 
import javafx.collections.FXCollections; 
import javafx.collections.ObservableList; 
import javafx.event.ActionEvent; 
import javafx.event.EventHandler; 
import javafx.scene.Scene; 
import javafx.scene.control.*; 
import javafx.scene.control.cell.PropertyValueFactory; 
import javafx.scene.layout.StackPane; 
import javafx.scene.layout.StackPaneBuilder; 
import javafx.stage.Stage; 
import javafx.util.Callback; 

public class ButtonDemo extends Application { 

    private TableView<Person> personTable = new TableView<>(); 
    private TableColumn<Person, String> nameCol = new TableColumn<>("name"); 
    private TableColumn<Person, Double> salaryCol = new TableColumn<>("salary"); 
    private TableColumn<Person, String> actionCol = new TableColumn<>("action"); 

    @Override 
    public void start(Stage primaryStage) { 
     ObservableList<Person> data = FXCollections.observableArrayList(); 
     for (int i = 0; i < 40; i++) { 
      data.add(new Person("person_" + i, i * 100d)); 
     } 

     nameCol.setCellValueFactory(new PropertyValueFactory<Person, String>("name")); 
     salaryCol.setCellValueFactory(new PropertyValueFactory<Person, Double>("salary")); 
     actionCol.setCellValueFactory(new PropertyValueFactory<Person, String>("name")); // "name" here is for just to render the column 

     Callback<TableColumn<Person, String>, TableCell<Person, String>> printColumnCellFactory = // 
       new Callback<TableColumn<Person, String>, TableCell<Person, String>>() { 

      @Override 
      public TableCell call(final TableColumn param) { 
       final TableCell cell = new TableCell() { 

        @Override 
        public void updateItem(Object item, boolean empty) { 
         super.updateItem(item, empty); 
         if (empty) { 
          setText(null); 
          setGraphic(null); 
         } else { 
          final Button btnPrint = new Button("print name"); 
          btnPrint.setOnAction(new EventHandler<ActionEvent>() { 

           @Override 
           public void handle(ActionEvent event) { 
            param.getTableView().getSelectionModel().select(getIndex()); 
            Person item = personTable.getSelectionModel().getSelectedItem(); 
            if (item != null) { 
             System.out.println(item.getName()); 
            } 
           } 
          }); 
          setGraphic(btnPrint); 
          setContentDisplay(ContentDisplay.GRAPHIC_ONLY); 
         } 
        } 
       }; 
       return cell; 
      } 
     }; 
     actionCol.setCellFactory(printColumnCellFactory); 

     personTable.setItems(data); 
     personTable.getColumns().addAll(nameCol, salaryCol, actionCol); 
     StackPane root = StackPaneBuilder.create().children(personTable).build(); 
     primaryStage.setScene(new Scene(root, 300, 250)); 
     primaryStage.show(); 
    } 

    public class Person { 

     private String name; 
     private Double salary; 

     public Person(String name, Double salary) { 
      this.name = name; 
      this.salary = salary; 
     } 

     public String getName() { 
      return name; 
     } 

     public Double getSalary() { 
      return salary; 
     } 
    } 

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

Answer 1

升級到2.1版解決了這個問題。