在一列中添加兩個按鈕並獲取點擊行值javafx

我想在javafx中的表視圖的一列中實現兩個按鈕。我能夠在一列中實現一個按鈕，但無法在一列中添加兩個按鈕。我有一些想法從這個鏈接在一列中添加兩個按鈕並獲取點擊行值javafx

我使用這個想法在上面的鏈接。但是，代碼不適合我。

TableColumn<Student, String> firstCol = new TableColumn<Student, String>("ID"); 
    TableColumn<Student, String> secondCol = new TableColumn<Student, String>("Name"); 
    TableColumn<Student, String> thirdCol = new TableColumn<Student, String>("Quiz Mark"); 
    TableColumn<Student, String> forthCol = new TableColumn<Student, String>("A1"); 
    TableColumn<Student, String> fifthCol = new TableColumn<Student, String>("A2"); 
    TableColumn<Student, String> sixthCol = new TableColumn<Student, String>("A3"); 
    TableColumn<Student, String> sevenCol = new TableColumn<Student, String>("Exam"); 
    TableColumn<Student, String> eightCol = new TableColumn<Student, String>("Result"); 
    TableColumn<Student, String> nineCol = new TableColumn<Student, String>("Grade"); 
    TableColumn<Student, Student> tenthCol = new TableColumn<Student, Student>("Action"); 


firstCol.setCellValueFactory(new PropertyValueFactory<>("Id")); 
    secondCol.setCellValueFactory(new PropertyValueFactory<>("Name")); 
    thirdCol.setCellValueFactory(new PropertyValueFactory<>("QuizMark")); 
    forthCol.setCellValueFactory(new PropertyValueFactory<>("Assingment1Mark")); 
    fifthCol.setCellValueFactory(new PropertyValueFactory<>("Assingment2Mark")); 
    sixthCol.setCellValueFactory(new PropertyValueFactory<>("Assingment3Mark")); 
    sevenCol.setCellValueFactory(new PropertyValueFactory<>("ExamMark")); 
    eightCol.setCellValueFactory(new PropertyValueFactory<>("Result")); 
    nineCol.setCellValueFactory(new PropertyValueFactory<>("Grade")); 
    tenthCol.setCellFactory(param -> new TableCell<Student, Student>() { 
     private final Button editButton = new Button("edit"); 
     private final Button deleteButton = new Button("delete"); 
     HBox pane = new HBox(deleteButton, editButton); 

     @Override 
     protected void updateItem(Student patient, boolean empty) { 
      super.updateItem(patient, empty); 

      if (patient == null) { 
       setGraphic(null); 
       return; 
      } 

      deleteButton.setOnAction(event -> { 
       Student getPatient = getTableView().getItems().get(getIndex()); 
       System.out.println(getPatient.getId() + " " + getPatient.getName()); 
      }); 

      editButton.setOnAction(event -> { 
       Student getPatient = getTableView().getItems().get(getIndex()); 
      }); 
      pane.getChildren().addAll(deleteButton,editButton); 
      setGraphic(pane); 
     } 
    });

在，不出現的動作列按鈕不會。我在哪裏做錯了。請任何人都讓我知道。

來源

2017-09-30 San Jaisy

由於缺乏cellValueFactory項目爲細胞tenthColumn是總是null。使用updateItem方法的第二個參數來確定該行是否爲空。

此外，爲了說明這一點，我會將列的類型更改爲TableColumn<Student, Void>。

此外再次每次項改變是不必要的，因爲在更新處理程序onAction時間加入HBox的兒童，由於getIndex()在被點擊Button的時間進行評價。

您可以將代碼改成這樣：

TableColumn<Student, Void> tenthCol = new TableColumn<>("Action"); 

... 

tenthCol.setCellFactory(param -> new TableCell<Student, Void>() { 
    private final Button editButton = new Button("edit"); 
    private final Button deleteButton = new Button("delete"); 
    private final HBox pane = new HBox(deleteButton, editButton); 

    { 
     deleteButton.setOnAction(event -> { 
      Student getPatient = getTableView().getItems().get(getIndex()); 
      System.out.println(getPatient.getId() + " " + getPatient.getName()); 
     }); 

     editButton.setOnAction(event -> { 
      Student getPatient = getTableView().getItems().get(getIndex()); 
     }); 
    } 

    @Override 
    protected void updateItem(Void item, boolean empty) { 
     super.updateItem(item, empty); 

     setGraphic(empty ? null : pane); 
    } 
});

來源

2017-09-30 06:52:51 fabian

在一列中添加兩個按鈕並獲取點擊行值javafx

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