僅通過左鍵單擊選擇ListView項目

Question

使用JavaFX ListView時，如果您右鍵點擊項目，則選擇該項目。

是否可能只有選擇一個項目如果你左鍵點擊它？

Answer 1

只需過濾MOUSE_PRESSED事件，檢查輔助按鈕是否關閉，使用它並在需要時添加自定義處理代碼。

右鍵單擊也可以觸發OS X觸摸板上的一個ContextMenuEvent.CONTEXT_MENU_REQUESTED事件（並且此類事件會有點奇怪地觸發選擇），因此也會篩選並使用這些事件。

這個工作對我來說：

public class ListViewSample extends Application { 

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

    @Override 
    public void start(Stage primaryStage) { 
     primaryStage.setTitle("List View Sample");   

     ListView<String> list = new ListView<String>(); 
     ObservableList<String> items =FXCollections.observableArrayList ("Single", "Double", "Suite", "Family App"); 
     list.setItems(items);  

     // filter right mouse button 
     list.addEventFilter(MouseEvent.MOUSE_PRESSED, e -> 
     { 
      if(e.isSecondaryButtonDown()) { 
       e.consume(); 
      } 

     }); 

     list.addEventFilter(ContextMenuEvent.CONTEXT_MENU_REQUESTED, Event::consume); 

     // verify selection via logging 
     list.getSelectionModel().selectedItemProperty().addListener(
       (ChangeListener<String>) (observable, oldValue, newValue) -> System.out.println("Item selected: " + observable + ", " + oldValue + ", " + newValue) 
       ); 

     StackPane root = new StackPane(); 
     root.getChildren().add(list); 
     primaryStage.setScene(new Scene(root, 200, 250)); 
     primaryStage.show(); 
    } 
} 

Answer 2

可能是這可以幫助

-Controller

@FXML 
ListView<String> listT=new ListView<String>(); 
@FXML 
Label lbl=new Label(); 

public void initialize(URL location, ResourceBundle resources) { 
    listT=new Listv(listT); 

} 

類擴展列表視圖

public class Listv extends ListView<String>{ 
ListView<String> llist=new ListView<String>(); 
int PrevIndex=0; 

public Listv(ListView<String> l) { 
    this.llist=l; 
    llist.getItems().add("A"); 
    llist.getItems().add("A"); 
    llist.getItems().add("A"); 
    llist.getItems().add("A"); 
    this.llist.setOnMouseClicked(listclicked); 
    this.llist.getSelectionModel().selectedIndexProperty().addListener(indexChanged); 
} 

EventHandler<MouseEvent> listclicked=new EventHandler<MouseEvent>() {  
    @Override 
    public void handle(MouseEvent event) { 
     if(event.getButton() == MouseButton.SECONDARY) 
     {    
      Platform.runLater(()->{ 
       llist.getSelectionModel().select(PrevIndex); 
      });   
     } 
    } 
}; 

ChangeListener<Object> indexChanged=new ChangeListener<Object>() { 

    @Override 
    public void changed(ObservableValue<? extends Object> observable,Object oldValue, Object newValue) { 
     PrevIndex=Integer.parseInt(oldValue.toString()); 
    } 
}; 
}