重新使用tableview上下文菜單時確定JavaFX表格行的詳細信息

Question

我有一個類似於this示例的要求。

在EventHandler回調中，如何確定哪一行被點擊？

@Override 
public void handle(ActionEvent event) { 
    // how do I get the row details when reusing context menu and handler code? 
} 

我分享上下文菜單，因爲我要補充如果任一行選擇了CheckMenuItem誰的狀態是「全局」表，即，我想告訴它，當我點擊任何作爲託運表中的其他行。

Answer 1

每行使用一個行工廠和一個上下文菜單，就像在你鏈接的問題中一樣。

對於「全局」CheckMenuItem，創建一個BooleanProperty並雙向綁定CheckMenuItem的選定屬性。

SSCCE：

import java.util.function.Function; 
import java.util.stream.IntStream; 

import javafx.application.Application; 
import javafx.beans.property.BooleanProperty; 
import javafx.beans.property.IntegerProperty; 
import javafx.beans.property.SimpleBooleanProperty; 
import javafx.beans.property.SimpleIntegerProperty; 
import javafx.beans.property.SimpleStringProperty; 
import javafx.beans.property.StringProperty; 
import javafx.beans.value.ObservableValue; 
import javafx.scene.Scene; 
import javafx.scene.control.CheckMenuItem; 
import javafx.scene.control.ContextMenu; 
import javafx.scene.control.MenuItem; 
import javafx.scene.control.SeparatorMenuItem; 
import javafx.scene.control.TableColumn; 
import javafx.scene.control.TableRow; 
import javafx.scene.control.TableView; 
import javafx.scene.layout.BorderPane; 
import javafx.stage.Stage; 

public class TableWithContextMenu extends Application { 

    @Override 
    public void start(Stage primaryStage) { 
     TableView<Item> table = new TableView<>(); 
     table.getColumns().add(column("Item", Item::nameProperty)); 
     table.getColumns().add(column("Value", Item::valueProperty)); 

     BooleanProperty globalSelection = new SimpleBooleanProperty(); 

     table.setRowFactory(t -> { 
      TableRow<Item> row = new TableRow<>(); 
      ContextMenu contextMenu = new ContextMenu(); 
      MenuItem item1 = new MenuItem("Do something"); 
      item1.setOnAction(e -> System.out.println("Do something with "+row.getItem().getName())); 
      MenuItem item2 = new MenuItem("Do something else"); 
      item2.setOnAction(e -> System.out.println("Do something else with "+row.getItem().getName())); 

      CheckMenuItem item3 = new CheckMenuItem("Global selection"); 
      item3.selectedProperty().bindBidirectional(globalSelection); 

      contextMenu.getItems().addAll(item1, item2, new SeparatorMenuItem(), item3); 
      row.emptyProperty().addListener((obs, wasEmpty, isEmpty) -> { 
       if (isEmpty) { 
        row.setContextMenu(null); 
       } else { 
        row.setContextMenu(contextMenu); 
       } 
      }); 
      return row ; 
     }); 

     IntStream.rangeClosed(1, 25).mapToObj(i -> new Item("Item "+i, i)).forEach(table.getItems()::add); 

     primaryStage.setScene(new Scene(new BorderPane(table), 800, 600)); 
     primaryStage.show(); 
    } 

    private <S,T> TableColumn<S,T> column(String title, Function<S, ObservableValue<T>> property) { 
     TableColumn<S,T> col = new TableColumn<>(title); 
     col.setCellValueFactory(cellData -> property.apply(cellData.getValue())); 
     return col ; 
    } 

    public static class Item { 
     private final IntegerProperty value = new SimpleIntegerProperty(); 
     private final StringProperty name = new SimpleStringProperty(); 

     public Item(String name, int value) { 
      setName(name); 
      setValue(value); 
     } 

     public final IntegerProperty valueProperty() { 
      return this.value; 
     } 

     public final int getValue() { 
      return this.valueProperty().get(); 
     } 

     public final void setValue(final int value) { 
      this.valueProperty().set(value); 
     } 

     public final StringProperty nameProperty() { 
      return this.name; 
     } 

     public final String getName() { 
      return this.nameProperty().get(); 
     } 

     public final void setName(final String name) { 
      this.nameProperty().set(name); 
     } 


    } 

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