如何在 JavaFX 上使用 checkBox 选择行?

How to get the rows selected with checkBox on JavaFX?

我正在使用 JavaFx,我有一个使用 sceneBuilder 创建的 table 视图,它包含 3 列,其中一列用于 checkBoxes,还有一个名为print_tab,我希望当我单击此按钮时使用复选框选择 行 -> true 但我不知道怎么做:

我读了很多关于回调复选框 table 列的例子,但不知道该怎么做。

这是控制器:

    import javafx.collections.FXCollections;
    import javafx.collections.ObservableList;
    import javafx.fxml.FXML;
    import javafx.fxml.FXMLLoader;
    import javafx.fxml.Initializable;
    import javafx.geometry.Insets;
    import javafx.scene.Parent;
    import javafx.scene.Scene;
    import javafx.scene.control.Button;
    import javafx.scene.control.CheckBox;
    import javafx.scene.control.TableCell;
    import javafx.scene.control.TableColumn;
    import javafx.scene.control.TableView;
    import javafx.scene.control.cell.CheckBoxTableCell;
    import javafx.scene.control.cell.PropertyValueFactory;
    import javafx.scene.input.MouseEvent;
    import javafx.scene.layout.AnchorPane;
    import javafx.scene.layout.HBox;
    import javafx.stage.Stage;
    import javafx.stage.StageStyle;
    import javafx.util.Callback;


     public class RecapController implements Initializable{

     @FXML
     private TableView<OMission> missionTable;

    @FXML
    private TableColumn<OMission, Boolean> checkedCol; 

      private ObservableList<OMission> UserMission = 
 FXCollections.observableArrayList();
    
      private OMission mission=null;
    
    
    
    @Override
    public void initialize(URL arg0, ResourceBundle arg1) {
        
         
         
         try {
            load_recap();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
         
    }

    public void load_recap(){
    

      .....

     
    checkedCol.setCellFactory(
                                CheckBoxTableCell.forTableColumn(checkedCol)
                            );
                        
    checkedCol.setCellValueFactory(new PropertyValueFactory<>("remark"));

                    checkedCol.setEditable(true);


          }


    public void print_tab() throws Exception {

                  // here is the method that the button calls , i want to get here the selected rows with checkbox -> true                  

                  }

          }

在 class 模型上我有这个代码:

    public class OMission {

         private String ObjMission ;
         private Boolean remark;

         public OMission(  String objMission ) {

                 This.objMission = ObjMission ;

                 remark = false;
                           
                                    }

        public Boolean getRemark() {
            return remark;
        }

        public void setRemark(Boolean remark) {
            this.remark = remark;
        }


        public String getObjMission() {
            return ObjMission;
        }



        public void setObjMission(String objMission) {
            ObjMission = objMission;
        }

}

fxml代码:

<?xml version="1.0" encoding="UTF-8"?>

<?import com.jfoenix.controls.JFXButton?>
<?import javafx.scene.control.CheckBox?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>

<AnchorPane fx:id="pan" prefHeight="740.0" prefWidth="1258.0" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.RecapController">
   <children>
      <JFXButton layoutX="16.0" layoutY="22.0" onAction="#OpenMission" style="-fx-background-color: #0A4969;" text="Ajouter une nouvelle mission : " textFill="WHITE">
         <font>
            <Font size="14.0" />
         </font>
      </JFXButton>
      <TableView fx:id="missionTable" layoutX="16.0" layoutY="64.0" prefHeight="659.0" prefWidth="1226.0">
                    <columns>
                      <TableColumn prefWidth="612.5" text="RAPPORT DE MISSION">
                           <columns>
                                
                              
                              <TableColumn fx:id="local" prefWidth="100.0" text="Localité" />
                              <TableColumn fx:id="objmission" prefWidth="243.0" text="Objet Mission" />
                              
                           </columns>
                        </TableColumn>
                    
            <TableColumn fx:id="checkedCol"  prefWidth="75.0" text="select" /> // That's the button i want to click on 
                    </columns>
                  </TableView>
      <JFXButton layoutX="263.0" layoutY="25.0" onAction="#print_tab" text="print" />
      <CheckBox fx:id="SelectAll" layoutX="1154.0" layoutY="41.0" mnemonicParsing="false" text="Select All" />

   </children>
    

有什么想法吗?

编辑:

public void print_tab() throws Exception {

         for(OMission bean : UserMission)
    {
        System.out.println(bean.getRemark()); // always getting false
        if(bean.getRemark()) {
            
            System.out.println(bean.getObjMission());
        }
    }                         

                  }

我试过这种方法,但即使我选中了一些复选框,我总是得到 false not true,知道吗?同时我认为迭代所有集合不是一件好事...

我会在 OMission class:

中实现 FX 属性 模式
public class OMission {

    private final StringProperty objMission = new SimpleStringProperty(this, "objMission");
    private final BooleanProperty remark = new SimpleBooleanProperty(this, "remark");

    public OMission(String objMission) {
        this.objMission.set(objMission);
        this.remark.set(false);
    }

    public StringProperty objMissionProperty() {
        return objMission;
    }

    public String getObjMission() {
        return objMissionProperty().get();
    }

    public void setObjMission(String objMission) {
        objMissionProperty().set(objMission);
    }

    public BooleanProperty remarkProperty() {
        return remark;
    }

    public Boolean getRemark() {
        return remarkProperty().get();
    }

    public void setRemark(Boolean remark) {
        remarkProperty().set(remark);
    }
}

那你就可以把CellValueFactory列替换成:

checkedCol.setCellValueFactory(new PropertyValueFactory<>("remark"));

与:

checkedCol.setCellValueFactory(cellData -> cellData.getValue().remarkProperty());

按照建议 and here, correctly defined properties are critical to a working table model. In this way, the button handler can iterate over the table's ObservableList to find selected rows. To study the problem in isolation, start from this complete example。以下更改遍历 table 模型,检查 active 属性 以生成显示的结果:

Button b = new Button("Print Seleceted");
b.setOnAction((ActionEvent e) -> {
    for (Person p : table.getItems()) {
        if (p.active.get()) {
            System.out.println(p.lastName.get() + ": " + p.email.get());
        }
    }
});
vbox.getChildren().addAll(label, table, b);

控制台:

Smith: jacob.smith@example.com
Williams: ethan.williams@example.com
Brown: michael.brown@example.com