JavaFX创建没有外部库的popover [英] JavaFX create popover without external libraries

问题描述

如何从 javafx.scene.control.DatePicker 中创建一个类似于 DatePicker 类的弹出窗口这里：

How can I create a popover like in the DatePicker class from javafx.scene.control.DatePicker as seen here:

弹出窗口应显示为在这里看到的所有其他组件之上（popover在 TextField 之上）：

The popover should when displayed be on top of all the other components as seen here (the popover is above the TextField):

推荐答案

找到一个非常简单的解决方案来解决我的问题，这里有一个代码片段，以防万一人们遇到同样的问题

Found a pretty simple solution to my problem, here is a code snippet in case people encounter the same problem

package main;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.CustomMenuItem;
import javafx.scene.control.Label;
import javafx.scene.control.MenuButton;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class Main extends Application {

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

    @Override
    public void start(Stage primaryStage) {
        BorderPane rootPane = new BorderPane();
        MenuButton openButton = new MenuButton("Open Context Menu");
        BorderPane contentPane = new BorderPane();
        CustomMenuItem item = new CustomMenuItem(contentPane);
        openButton.setStyle("-fx-selection-bar: transparent;"); //this is optional. it makes the blue background that appears when something is focused transparent
        contentPane.setPrefSize(300, 300);
        Label text = new Label("The ContextMenu will only close when you click the\nbutton below OR click outside of the ContextMenu.\nHow neat is that?");
        text.setStyle(" -fx-text-fill: -fx-text-base-color;"); //needs to bet set if you want the selection-bar to be transparent. if not set the text will become invisible
        contentPane.setTop(text);
        Button closeButton = new Button("Close this popover");
        closeButton.setOnAction(x -> {
            openButton.hide();
        });
        contentPane.setBottom(closeButton);
        item.setHideOnClick(false); // this will stop the ContextMenu from being hidden when clicking inside of it.
        openButton.getItems().add(item);
        rootPane.setCenter(openButton);
        Scene scene = new Scene(rootPane, 550, 250);
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

我刚放了窗格我的所有内容都在 CustomMenuItem 中，并将 CustomMenuItem 添加到我的 MenuButton 。

I just placed a Pane with all of my content inside of a CustomMenuItem and added that CustomMenuItem to my MenuButton.

这篇关于JavaFX创建没有外部库的popover的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！