TableView - 单元格的上移和下移功能

时间:2015-03-04 11:42:03

标签: java javafx tableview

我的情况是TableView。我试图实现一个允许单元格向上或向下移动的功能。向上或向下移动单元格(使用单元格内容)后,我想将焦点更改为单元格的新位置。

问题在于它没有改变到新位置。它由于某种原因停留在原始选定的单元格位置。

这是用于向上移动,向下移动和更改焦点的代码:

我正在尝试移动一个选定的单元格。

public class TableController
{
    private ObservableList<SimpleStringProperty> observablePrnPropertyData;

    @FXML
    private TableView<SimpleStringProperty> table;
    @FXML
    private TableColumn<SimpleStringProperty, String> data;        

    @FXML
    private void initialize()
    {
        this.data.setCellValueFactory(cellData -> cellData.getValue());
        this.data.setCellFactory(event -> new EditCell(this.observablePrnPropertyData, this.table));
    }

    public void display(final PrnProperty prnProperty)
    {
        this.observablePrnPropertyData = PrnPropertyUtil.getObservableDataFromPrnProperty(prnProperty);
        this.table.setItems(this.observablePrnPropertyData);
    }


    private final class EditCell extends TableCell<SimpleStringProperty, String>
    {
        @Override
        public void updateItem(String item, boolean empty)
        {
            super.updateItem(item, empty);

            if (empty)
            {
                this.setText(null);
                this.setGraphic(null);
            }
            else
            {
                this.setUpContextMenu();

                this.setText(this.getString());
                this.setGraphic(null);
            }
        }

        private void setUpContextMenu()
        {
            // Context menu
            ContextMenu contextMenu = new ContextMenu();

            // context menu Move up
            this.moveUp = new MenuItem("Move up");
            this.moveUp.setOnAction(event -> this.moveUp(this.table, this.observablePrnPropertyData));
            contextMenu.getItems().add(this.moveUp);

            // Context menu for move down
            this.moveDown = new MenuItem("Move down");
            this.moveDown.setOnAction(event -> this.moveDown(this.table, this.observablePrnPropertyData));
            contextMenu.getItems().add(this.moveDown);

            // Add context menu
            this.setContextMenu(contextMenu);
        }

        public void moveUp(final TableView<?> table, ObservableList listToManipulate)
        {
            final int selectedIndex = table.getSelectionModel().getSelectedIndex();

            final Object removeItem = listToManipulate.remove(selectedIndex);

            final int newIndex = selectedIndex - 1;
            listToManipulate.add(newIndex, removeItem);
            this.changeTableCellFocus(table, newIndex);
        }

        public void moveDown(final TableView<?> table, ObservableList listToManipulate)
        {
            final int selectedIndex = table.getSelectionModel().getSelectedIndex();

            final Object remove = listToManipulate.remove(selectedIndex);

            final int newIndex = selectedIndex + 1;
            listToManipulate.add(newIndex, remove);
            this.changeTableCellFocus(table, newIndex);
        }

        public void changeTableCellFocus(final TableView<?> table, final int focusIndex)
        {
            table.requestFocus();
            table.getSelectionModel().clearAndSelect(focusIndex);
            table.getFocusModel().focus(focusIndex);
        }
    }
}

如果有人可以提供一个有效的例子,那就太好了。我真的想知道我做错了什么。

1 个答案:

答案 0 :(得分:0)

如果你只需要关注下一行和上一行,你可以尝试:table.getFocusModel()。focusNext()和.focusPrevious(),如下所述:http://docs.oracle.com/javafx/2/api/javafx/scene/control/FocusModel.html