Question

我想在JavaFX应用程序中创建一个表，所以我创建了一个定义数据模型的类，并提供了进一步使用表的方法和字段。这是代码：

import java.util.ArrayList;
import java.util.List;
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;

public class Item {
   private final SimpleStringProperty id;
   private final SimpleStringProperty serial_number ;
   private final SimpleStringProperty description;
   private final BooleanProperty check;
   private final IntegerProperty language;
   private final SimpleStringProperty cpvCode=new SimpleStringProperty("");
   private final SimpleStringProperty replaceItem=new SimpleStringProperty("");
   private final SimpleStringProperty includeInContract=new SimpleStringProperty("");
   private final List<Attribute> listOfAttrs=new ArrayList(); 




    public Item(String id1,String num,String des,Boolean bool,int lang) {
        this.description = new SimpleStringProperty(des);
        this.id = new SimpleStringProperty(id1);
        this.serial_number= new SimpleStringProperty(num);
        this.check=new SimpleBooleanProperty(bool);
        this.language=new SimpleIntegerProperty(lang);
        this.listOfAttrs.add(new Attribute("Yoo"));

    }

    public StringProperty cpvCodeProperty() {
        return cpvCode;
    }
    public StringProperty replaceItemProperty() {
        return replaceItem;
    }
    public StringProperty includeInContractProperty() {
        return includeInContract;
    }
    public IntegerProperty languageProperty(){
        return language;
    }
    public BooleanProperty checkProperty(){
        return check;
    }
    public StringProperty idProperty() {
        return id;
    }

    public StringProperty serial_numberProperty() {
        return serial_number;
    }

    public StringProperty descriptionProperty() {
        return description;
    }

    public void setLanguage(int lang){
        this.language.set(lang);
    }
    public void setId(String fid) {
        this.id.set(fid);
    }

    public void setSerial_number(String fnumber) {
        this.serial_number.set(fnumber);
    }

    public void setDescription(String fdesc) {
        this.description.set(fdesc);
    }

    public void setCheck(Boolean checking) {
        this.check.set(checking);
    }

    public void setCpvCode(String cpv) {
        this.cpvCode.set(cpv);
    }
    public void setReplaceItem(String replace) {
        this.replaceItem.set(replace);
    }
    public void setIncludeInContract(String include) {
        this.includeInContract.set(include);
    }
    public synchronized void setListOfAttrs(Attribute attrs) {

        listOfAttrs.add(attrs);
    }

    public synchronized StringProperty getListOfAttrs(int index) {

        return listOfAttrs.get(index).nameCodeProperty();
    }


}

我还创建了一个带有场景构建器的桌面视图

<AnchorPane id="Content" minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0" style="-fx-background-color: #F0F0F0;">
    <children>
        <TableView fx:id="tableForItems" editable="true" pickOnBounds="true" prefHeight="463.0" prefWidth="901.0" tableMenuButtonVisible="true" AnchorPane.bottomAnchor="129.0" AnchorPane.leftAnchor="14.0" AnchorPane.rightAnchor="41.0" AnchorPane.topAnchor="55.0">
            <columns>
                <TableColumn maxWidth="5000.0" minWidth="10.0" prefWidth="33.0" text="Id" fx:id="tID" />
                <TableColumn maxWidth="5000.0" minWidth="10.0" prefWidth="82.0" style="&#10;&#10;.table-view:focused .table-row-cell:filled .invalid-table-cell:selected:focused {&#10;    /* Works! */&#10;}&#10;&#10;.table-view:focused .table-row-cell:filled .invalid-table-cell:focused:selected:hover {&#10;    /* Works! */&#10;}" text="%prompt.column.item.serial.number" fx:id="tSer" />
                <TableColumn maxWidth="5000.0" minWidth="10.0" prefWidth="105.0" text="%prompt.column.item.description" fx:id="tDes" />
                <TableColumn maxWidth="5000.0" minWidth="0.0" prefWidth="121.0" text="%prompt.column.item.keywords" fx:id="checkId" />
                <TableColumn maxWidth="5000.0" minWidth="10.0" prefWidth="62.0" text="%prompt.column.item.url" fx:id="langId" />
                <TableColumn maxWidth="5000.0" minWidth="10.0" prefWidth="71.0" text="%prompt.column.item.cpv" fx:id="cpvId" />
                <TableColumn maxWidth="5000.0" minWidth="10.0" prefWidth="131.0" text="%prompt.column.item.replacesItem" fx:id="replaceItem" />
                <TableColumn maxWidth="5000.0" minWidth="10.0" prefWidth="155.0" text="%prompt.column.item.includedInContract" fx:id="includedInContract" />
            </columns>
        </TableView>
    </children>
</AnchorPane>

我已将数据与表格列相关联。

tID.setCellValueFactory(new PropertyValueFactory("id"));
tDes.setCellValueFactory(new PropertyValueFactory("description"));
tSer.setCellValueFactory(new PropertyValueFactory("serial_number"));
checkId.setCellValueFactory(new PropertyValueFactory("check"));
langId.setCellValueFactory(new PropertyValueFactory("language"));
cpvId.setCellValueFactory(new PropertyValueFactory("cpvCode"));
replaceItem.setCellValueFactory(new PropertyValueFactory("replaceItem"));

我想将列与arraylist listOfAttrs中的第一个值相关联。我做到了：

lastNameCol.setCellFactory(new Callback<TableColumn<Item,String>, TableCell<Item,String>>() {
    @Override
    public TableCell call(TableColumn p) {
        return new TableCell() {
            @Override
            protected void updateItem(Object item, boolean empty) {
                super.updateItem(item, empty);
                if (this.getTableRow() != null && item != null) {
                    Item current =(Item) this.getTableRow().getItem();
                    String s=current.getListOfAttrs(0).getValue();
                    setText(s);

                } 
                else {
                    setText("");
                }
            }
        };
    }
});
lastNameCol.setEditable(true);
lastNameCol.setOnEditCommit(
    new EventHandler<CellEditEvent<Item, String>>() {
    @Override
    public void handle(CellEditEvent<Item, String> t) {
        ((Item) t.getTableView().getItems().get(
        t.getTablePosition().getRow())).setListOfAttrs(new Attribute(t.getNewValue()));
    }
});

我在列中有第一个值，但是我无法编辑列，或者如果我更改了arraylist中的值，它就不会改变。有人能帮助我吗？

Answer 1

我的代码中有很多我不理解的东西，因为有些东西丢失了。您应该尽可能简单地运行并显示问题的示例。我复制了你的代码块，并添加了一些使其工作所需的东西。现在您拥有嵌套列表结构，该表响应列表中的更改和编辑。

包表;

import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableColumn.CellDataFeatures;
import javafx.scene.control.TableColumn.CellEditEvent;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.control.cell.TextFieldTableCell;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.util.Callback;

public class Table extends Application {

    private final ObservableList<Item> items = FXCollections.observableArrayList();

    @Override
    public void start(Stage primaryStage) {
        Button btn = new Button();
        btn.setText("add ids");
        btn.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent event) {
                items.addAll(new Item("id1"), new Item("id2"));
            }
        });

        VBox root = new VBox();
        root.getChildren().add(btn);

        TableColumn tID = new TableColumn("ID");
        tID.setCellValueFactory(new PropertyValueFactory("id"));

        TableColumn lastNameCol = new TableColumn("last name");
        lastNameCol.setCellValueFactory(new Callback<CellDataFeatures<Item, String>, ObservableValue<String>>() {
            public ObservableValue<String> call(CellDataFeatures<Item, String> p) {
                return p.getValue().getListOfAttrs();
            }
        });

        lastNameCol.setCellFactory(TextFieldTableCell.forTableColumn());
        lastNameCol.setOnEditCommit(new EventHandler<CellEditEvent<Item, String>>() {
            @Override
            public void handle(CellEditEvent<Item, String> t) {
                ((Item) t.getTableView().getItems().get(
                        t.getTablePosition().getRow())).setListOfAttrs(t.getNewValue());
            }
        });

    TableView tv = new TableView(items);

        tv.setEditable(true);
        tv.getColumns().addAll(tID, lastNameCol);
        root.getChildren().add(tv);
        Scene scene = new Scene(root, 300, 250);

        primaryStage.setTitle("Nested Obs list test");
        primaryStage.setScene(scene);

        primaryStage.show();
}

public class Item {

    private final SimpleStringProperty id;
    private final ObservableList<Attribute> listOfAttrs = FXCollections.observableArrayList();

    public Item(String id1) {
        this.id = new SimpleStringProperty(id1);
        this.listOfAttrs.add(new Attribute("Yoo " + id1));
    }

    public StringProperty idProperty() {
        return id;
    }

    public void setId(String fid) {
        this.id.set(fid);
    }

    public synchronized void setListOfAttrs(String attrs) {
        listOfAttrs.get(0).nameCode.set(attrs);
    }

    public synchronized StringProperty getListOfAttrs() {
        return listOfAttrs.get(0).nameCodeProperty();
    }

}

public class Attribute {

    private SimpleStringProperty nameCode;

    public Attribute(String s) {
        this.nameCode = new SimpleStringProperty(s);
    }

    public StringProperty nameCodeProperty() {
        return nameCode;
    }


}
}

如何在java fx中使用数组中的值关联和编辑tableview列？

1 个答案: