在按钮上设置操作以一键执行两项操作

Question

这是场景，我有一个主窗口，我单击一个按钮会打开一个弹出窗口。在这个弹出窗口中，我有一个表格视图，其中显示了一些数据，并且它有一个名为 select 的按钮。从表格视图中选择数据后，当我按下选择按钮时，我希望这个弹出窗口关闭，我从中选择的数据出现在我的主窗口中。

到目前为止，我唯一能做的就是从弹出窗口中提取数据，我希望它也只需单击一下即可关闭

private void venueDisplay(String title, String message) {
    Stage window = new Stage();

    //Block events to other windows
    window.initModality(Modality.APPLICATION_MODAL);
    window.setTitle(title);
    window.setMinWidth(400);

    HBox hBox = new HBox();
    hBox.setPadding(new Insets(10,10,10,10));
    hBox.setSpacing(10);
    hBox.setMaxHeight(20);
    hBox.setAlignment(Pos.BOTTOM_CENTER);

    hBox.getChildren().add(selectVenueButton);

    //Display all the available venues to choose for allocation
    VBox layout = new VBox(10);
    venueList = new ListView<>();
    ObservableList<Venue> observableVenue = FXCollections.observableArrayList(model.getVenues());
    venueList.setItems(observableVenue);


    layout.getChildren().addAll(venueList, hBox);

    //Display window and wait for it to be closed before returning
    Scene scene1 = new Scene(layout,300,500);
    window.setScene(scene1);
    window.showAndWait();
}

public void selectButtonHandler(EventHandler<ActionEvent> handler) {
    selectVenueButton.setOnAction(handler);
}

Answer 1

请考虑这个示例，您可以将这个想法应用到您的程序中（评论中的解释）。

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ListView;
import javafx.scene.control.SelectionMode;
import javafx.scene.control.TextArea;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Modality;
import javafx.stage.Stage;

public class GetInfoFromPopUpWindow extends Application{

    static TextArea textArea = new TextArea(); // to be filled from the pop-up window

    @Override
    public void start(Stage primaryStage) throws Exception {
        // create the main Window and some simple components
        // Suppose it contains a TextArea only for simplicity sake

        Button open = new Button("Open Popup Window");

        //simple container as a root for testing
        HBox root = new HBox();
        root.getChildren().addAll(textArea, open);

        Scene scene = new Scene(root,610,400);

        primaryStage.setScene(scene);
        primaryStage.setTitle("Main Window");
        primaryStage.show();


        //Add Action Listener to the open Button
        open.setOnAction(e->{ // lambda expression, read more about it in the Documentation
            popUpWindow(); // call the method to open a pop-up wondow(see later)
        });

    }

    public static void popUpWindow(){
        VBox root = new VBox();
        Button fetchInfo = new Button("Finish");
        //create a listView and populate it with some info for testing purpose
        // suppose the info you get from some database
        ListView<String> listView = new ListView<String>();
        ObservableList<String> items = FXCollections.observableArrayList (
                                "First Item", "Second Item", "Third Item", "Fourth Item");
        listView.setItems(items);
        //to select more than one item
        listView.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);

        //decoration and size are up to your preference
        listView.setPrefWidth(100);
        listView.setPrefHeight(100);

        root.getChildren().addAll(listView, fetchInfo);
        root.setAlignment(Pos.CENTER);

        Scene scene = new Scene(root, 250,150);

        Stage stage = new Stage();
        stage.initModality(Modality.APPLICATION_MODAL);
        stage.setScene(scene);
        stage.setTitle("Popup Window");
        stage.show();

        // Add action listener to fetchInfo Button in this Window
        fetchInfo.setOnAction(e->{
            // take the info from listView and fill it in the TextArea in the main Window
            // just for testing purposes
            for (String selectedItem : listView.getSelectionModel().getSelectedItems()){
                textArea.appendText(selectedItem + " \n");
            }

            // when it finishes -> close the window and back to the first one
            stage.close();
        });

    }

    public static void main(String[] args) {
        launch();

    }

}

测试

点击任何按钮之前的主窗口

---

单击按钮并选择某些项目后的弹出窗口

---

点击完成按钮后，关闭弹出窗口，然后返回主菜单并显示信息（选定项目）

Answer 2

我认为你可以这样做：

private Venue venueDisplay(String title, String message) {

    // existing code..

    window.showAndWait();
    return venueList.getSelectionModel().getSelectedItem();
}

然后你的selectVenueButton 只需要关闭窗口：

selectVenueButton.setOnAction(e -> window.hide());

Answer 3

你想在点击选择按钮上执行两个操作

1. 关闭弹出窗口：

在按钮上实现这个设置事件处理程序如下

selectVenueButton.setOnAction(handler);

在处理程序中，您可以编写关闭弹出窗口的逻辑，如下所示：

private EventHandler<ActionEvent> handler = new EventHandler<ActionEvent>() {

        public void handle(ActionEvent event) {
            Object source = event.getSource();
            if (source instanceof Button) {
                Button btn = (Button) source;
                Stage stage = (Stage) btn.getScene().getWindow();
                stage.close();
            }
        }
    };

1. 点击按钮后，您希望在主窗口中选择数据：

要在Class Level Scope (Member Variables) 上实现这个声明地点列表，这样你就可以在一个类之外访问。 在对话框类中：

ListView<Venue> venueList;

在主窗口中访问数据：

CustomDialog dialog = new CustomDialog(); //popup class
dialog.showDialog;
Venue selectedItem = dialog.venueList.getSelectionModel().getSelectedItems();