Combobox1 有 3 个项目(西班牙、法国、英国),Combobox2 有 6 个项目(巴塞罗那、马德里、巴黎、马赛、伦敦、布里斯托尔)。
当从 Combobox1(西班牙)中选择一个项目时,它应该可用于 Combobox2 的特定项目(巴塞罗那、马德里)。
谁能帮我这个?
提前致谢
三个组合框监听器示例代码。我认为这个解决方案对您有用。
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package threecombobox;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
/**
*
* @author reegan
*/
public class ThreeComboBox extends Application {
@Override
public void start(Stage primaryStage) {
List combox1List = new ArrayList();
for (int i = 1; i < 10; i++) {
combox1List.add(i);
}
final Map combox2Map = new HashMap();
for (int i = 0; i < combox1List.size(); i++) {
List l = new ArrayList();
for (int j = 1; j < 10; j++) {
int k = (int) combox1List.get(i) * 10 + j;
l.add(k);
}
combox2Map.put(combox1List.get(i), l);
}
final Map combox3Map = new HashMap();
for (Object o : combox1List) {
for (Object o1 : (List) combox2Map.get(o)) {
List l = new ArrayList();
for (int i = 1; i < 10; i++) {
int value = (int) o1 * 10 + i;
l.add(value);
}
combox3Map.put(o1, l);
}
}
ObservableList combox1 = FXCollections.observableList(combox1List);
HBox box = new HBox(20);
box.setPadding(new Insets(20, 20, 20, 20));
ComboBox cb1 = new ComboBox();
final ComboBox cb2 = new ComboBox();
final ComboBox cb3 = new ComboBox();
cb1.setItems(combox1);
cb1.getSelectionModel().selectedItemProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue ov, Object t, Object t1) {
ObservableList combox2 = FXCollections.observableArrayList((List) combox2Map.get(t1));
cb2.setItems(combox2);
}
});
cb2.getSelectionModel().selectedItemProperty().addListener(new ChangeListener() {
@Override
public void changed(ObservableValue ov, Object t, Object t1) {
if (t1 != null) {
ObservableList combox3 = FXCollections.observableArrayList((List) combox3Map.get(t1));
cb3.setItems(combox3);
}
}
});
box.getChildren().addAll(cb1, cb2, cb3);
Scene scene = new Scene(box, 300, 250);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* The main() method is ignored in correctly deployed JavaFX application.
* main() serves only as fallback in case the application can not be
* launched through deployment artifacts, e.g., in IDEs with limited FX
* support. NetBeans ignores main().
*
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
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