在javaFx表视图中为每行动态填充组合框列表 [英] Populate combo box list dynamically for each row in javaFx table view
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问题描述
我在java Fx中创建了一个表视图，表视图中的一个列包含
ComboBoxTableCell。请在下面查找表视图的代码
I have created a table view in java Fx, one of the columns in table view consists of ComboBoxTableCell.Please find below the code for table view
public class TabViewController {
@FXML
private TabPane cnfmTab;
@FXML
private TableView<TabVO> partsTable;
@FXML
private TableColumn<TabVO, String> column1;
@FXML
private TableColumn<TabVO, String> column2;
@FXML
private TableColumn<TabVO, String> column3;
private ObservableList<TabVO> tableData = FXCollections.observableArrayList();
private ObservableList<String> column1List;
@FXML
public void initialize(){
tableData = FXCollections.observableArrayList(callDAO.getTableData(1));
column1.setCellValueFactory(cellData -> new SimpleStringProperty(cellData.getValue().getColumn1()));
column1
.setCellFactory(new Callback<TableColumn<tabVO, String>, TableCell<tabVO, String>>() {
@SuppressWarnings({ "rawtypes", "unchecked" })
public TableCell call(TableColumn p) {
ComboBoxTableCell cell = new ComboBoxTableCell(column1List){
@Override
public void updateItem(Object item, boolean empty) {
}
};
cell.setAlignment(Pos.CENTER);
return cell;
}
});
column1.setOnEditCommit(
new EventHandler<CellEditEvent<tabVO, String>>() {
@Override
public void handle(CellEditEvent<tabVO,String> t) {
};
}
);
}
partsTable.setItems(tableData);
}
数据对象：
public class TabVO {
private String column1;
private String column2;
private String column3;
private ObservableList<String> column1List;
/* Getters and Setters */
}
在上面的代码中，表的每一行都是TabVo类型。
In the above code each row of the table is of type TabVo.
在表column1是组合框类型。现在，column1组合框的列表由
'column1List'填充，它在TabViewController中声明，因为表视图的所有行都使用相同的下拉列表填充
。
In the table column1 is of type combo box. Right now the list for column1 combo box is populate by 'column1List' which is declared in 'TabViewController', because of which all the rows of the table view are populated with the same drop down.
但我希望用TabVo中存在的不同列表填充表格的每一行。
But i want the each row of the table to be populated with different list which is present in TabVo.
任何人都可以告诉我如何访问TabVo对象并使用TabVo中的列表填充组合框？
Can anyone please tell me how to access TabVo object and populate the combobox with the list present in TabVo?
推荐答案
MVCE与问题中描述的用例：
This is a MVCE with use case described in the question:
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.control.cell.TextFieldTableCell;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
import javafx.util.Callback;
public class ComboBoxCellTableExample extends Application
{
private final TableView<TabVo> table = new TableView<>();
private final ObservableList<TabVo> data
= FXCollections.observableArrayList(
new TabVo( "2222", "column2", FXCollections.<String>observableArrayList( "111", "2222", "3333" ) ),
new TabVo( "bbbb", "column2", FXCollections.<String>observableArrayList( "aaaa", "bbbb", "ccccc" ) ),
new TabVo( "6666", "column2", FXCollections.<String>observableArrayList( "444", "5555", "6666" ) ),
new TabVo( "7777", "column2", FXCollections.<String>observableArrayList( "7777", "8888", "99999" ) ),
new TabVo( "hhhh", "column2", FXCollections.<String>observableArrayList( "hhhh", "jjjj", "kkkkk" ) )
);
@Override
public void start( Stage stage )
{
Scene scene = new Scene( new Group() );
stage.setWidth( 450 );
stage.setHeight( 550 );
table.setEditable( true );
Callback<TableColumn, TableCell> cellFactory = new Callback<TableColumn, TableCell>()
{
@Override
public TableCell call( TableColumn p )
{
return new ComboBoxCell();
}
};
TableColumn column1Col = new TableColumn( "Column 1" );
column1Col.setMinWidth( 100 );
column1Col.setCellValueFactory( new PropertyValueFactory<TabVo, String>( "column1" ) );
column1Col.setCellFactory( cellFactory );
column1Col.setOnEditCommit(
new EventHandler<TableColumn.CellEditEvent<TabVo, String>>()
{
@Override
public void handle( TableColumn.CellEditEvent<TabVo, String> t )
{
(( TabVo ) t.getTableView().getItems().get(
t.getTablePosition().getRow() )).setColumn1( t.getNewValue() );
}
}
);
TableColumn column2Col = new TableColumn( "Column 2" );
column2Col.setMinWidth( 100 );
column2Col.setCellValueFactory( new PropertyValueFactory<TabVo, String>( "column2" ) );
column2Col.setCellFactory( TextFieldTableCell.forTableColumn() );
column2Col.setOnEditCommit(
new EventHandler<TableColumn.CellEditEvent<TabVo, String>>()
{
@Override
public void handle( TableColumn.CellEditEvent<TabVo, String> t )
{
(( TabVo ) t.getTableView().getItems().get(
t.getTablePosition().getRow() )).setColumn2( t.getNewValue() );
}
}
);
table.setItems( data );
table.getColumns().addAll( column1Col, column2Col );
(( Group ) scene.getRoot()).getChildren().add( table );
stage.setScene( scene );
stage.show();
}
class ComboBoxCell extends TableCell<TabVo, String>
{
private ComboBox<String> comboBox;
public ComboBoxCell()
{
comboBox = new ComboBox<>();
}
@Override
public void startEdit()
{
if ( !isEmpty() )
{
super.startEdit();
comboBox.setItems( getTableView().getItems().get( getIndex() ).getColumn1List() );
comboBox.getSelectionModel().select( getItem() );
comboBox.focusedProperty().addListener( new ChangeListener<Boolean>()
{
@Override
public void changed( ObservableValue<? extends Boolean> observable, Boolean oldValue, Boolean newValue )
{
if ( !newValue )
{
commitEdit( comboBox.getSelectionModel().getSelectedItem() );
}
}
} );
setText( null );
setGraphic( comboBox );
}
}
@Override
public void cancelEdit()
{
super.cancelEdit();
setText( ( String ) getItem() );
setGraphic( null );
}
@Override
public void updateItem( String item, boolean empty )
{
super.updateItem( item, empty );
if ( empty )
{
setText( null );
setGraphic( null );
}
else
{
if ( isEditing() )
{
setText( null );
setGraphic( comboBox );
}
else
{
setText( getItem() );
setGraphic( null );
}
}
}
}
public static void main( String[] args )
{
launch( args );
}
public static class TabVo
{
private String column1;
private String column2;
private ObservableList<String> column1List;
private TabVo( String column1, String column2, ObservableList<String> column1List )
{
this.column1 = column1;
this.column2 = column2;
this.column1List = column1List;
}
public String getColumn1()
{
return column1;
}
public void setColumn1( String column1 )
{
this.column1 = column1;
}
public String getColumn2()
{
return column2;
}
public void setColumn2( String column2 )
{
this.column2 = column2;
}
public ObservableList<String> getColumn1List()
{
return column1List;
}
public void setColumn1List( ObservableList<String> column1List )
{
this.column1List = column1List;
}
}
}
第一列在编辑模式下使用组合框，而第二列在文本字段中使用默认工厂。
First column uses combobox in edit mode, while the second column uses default factory for textfields.
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