Getting selected element from ListView

问题

I modify a ListView with the results from a database search in order to use that selection to make another DB request later on.

I want to get the field value of that ListView. What method can I use for that?

I just thought I can also add an event to the onclick and keep it on an attribute for the controller. Is that acceptable too?

回答1:

Say with list view like this:

ListView<String> listView =new ListView<String>();

Getting selected element from ListView:

listView.getSelectionModel().getSelectedItem();

Tracking (Listening) the changes in list view selection:

listView.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<String>() {
    @Override
    public void changed(ObservableValue<? extends String> observable, String oldValue, String newValue) {
        System.out.println("ListView selection changed from oldValue = " 
                + oldValue + " to newValue = " + newValue);
    }
});

回答2:

You can make a custom event handler, first make a class to handle mouse events.

import javafx.event.EventHandler;
import javafx.scene.input.MouseEvent;

class ListViewHandler implements EventHandler<MouseEvent> {
    @Override
    public void handle(MouseEvent event) {
        //this method will be overrided in next step
    }
 }

After making the class, go to where you want the event to happen

 list.setOnMouseClicked(new ListViewHandler(){
        @Override
        public void handle(javafx.scene.input.MouseEvent event) {
            System.out.print(list.getSelectionModel().getSelectedIndex());
        }
 });

回答3:

JFXtras has a class that extends ListView that has a property called selectedItemProperty which I have found to be handy.

http://jfxtras.org/overview.html#_listview

来源：https://stackoverflow.com/questions/13264017/getting-selected-element-from-listview

标签

java

gridview

javafx-2