I want to create a list of groups which is displayed as a combo box:
import java.util.List;
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.scene.control.ListCell;
import javafx.scene.control.ListView;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.util.Callback;
public class Listobject extends Application
{
public static void main(String[] args)
{
launch(args);
}
@Override
public void start(Stage stage)
{
// Insert Some data
ListGroupsObj ob = ListGroupsObj.newInstance().groupId(12).groupName("Test");
ListGroupsObj osb = ListGroupsObj.newInstance().groupId(13).groupName("Test2");
final ComboBox<ListGroupsObj> listGroups = new ComboBox();
listGroups.setButtonCell(new GroupListCell());
listGroups.setCellFactory(new Callback<ListView<ListGroupsObj>, ListCell<ListGroupsObj>>()
{
@Override
public ListCell<ListGroupsObj> call(ListView<ListGroupsObj> p)
{
return new GroupListCell();
}
});
listGroups.setEditable(true);
listGroups.getItems().addAll(ob, osb);
listGroups.setValue(ob);
// Display the selected Group
listGroups.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<ListGroupsObj>()
{
@Override
public void changed(ObservableValue<? extends ListGroupsObj> arg0, ListGroupsObj arg1, ListGroupsObj arg2)
{
if (arg2 != null)
{
System.out.println("Selected Group: " + arg1.getGroupId() + " - " + arg2.getGroupName());
}
}
});
final StackPane layout = new StackPane();
layout.getChildren().add(listGroups);
layout.setStyle("-fx-background-color: cornsilk; -fx-padding: 15;");
stage.setScene(new Scene(layout));
stage.show();
}
class GroupListCell extends ListCell<ListGroupsObj>
{
@Override
protected void updateItem(ListGroupsObj item, boolean empty)
{
super.updateItem(item, empty);
if (item != null)
{
setText(item.getGroupId() + " - " + item.getGroupName());
}
}
}
private List<ListGroupsObj> listGroups;
public static class ListGroupsObj
{
private int groupId;
private String groupName;
public static ListGroupsObj newInstance()
{
return new ListGroupsObj();
}
public ListGroupsObj()
{
}
public ListGroupsObj groupId(int groupId)
{
this.groupId = groupId;
return this;
}
public ListGroupsObj groupName(String groupName)
{
this.groupName = groupName;
return this;
}
public int getGroupId()
{
return groupId;
}
public String getGroupName()
{
return groupName;
}
// @Override
// public String toString()
// {
// return serverName;
// }
}
}
When I add listGroups.setEditable(true); the label of the default selected group is not readable. Can you help me to fix this issue? Also can you tell me how I can optimiza this code to make is easy for use?
