如何使用 JavaFX 在警报中播放视频？

Question

我正在尝试使用 JavaFX 在警告对话框中播放视频。问题是我找不到如何显示视频或更多如何将其插入警报？

这是我的警报代码

MediaPlayer player = new MediaPlayer( new Media(getClass().getResource("video.mp4").toExternalForm()));
MediaView mediaView = new MediaView(player);

private void alert(){
 Alert alert = new Alert(Alert.AlertType.ERROR);
 alert.setTitle("Don't be a fool");
 alert.setHeaderText("");
 alert.setContentText("Do you really think your time is correct ?");
 Optional<ButtonType> result = alert.showAndWait();
}

Answer 1

一个Alert extends from Dialog, which means you can customize its DialogPane。如果您想在警报中添加视频，最好的位置可能是对话框窗格的 content。但请注意，设置 content 将替换 contentText （您在示例代码中设置）：

In addition to the header and content properties, there exists header text and content text properties. The way the *Text properties work is that they are a lower precedence compared to the Node properties, but they are far more convenient for developers in the common case, as it is likely the case that a developer more often than not simply wants to set a string value into the header or content areas of the DialogPane.

这意味着，如果您仍想显示 "Do you really think your time is correct?"，您还必须将自己的 Label 添加到内容中。例如：

Alert alert = new Alert(Alert.AlertType.ERROR);
alert.setTitle("Don't be a fool");
alert.setHeaderText("");

Label label = new Label("Do you really think your time is correct?");
VBox content = new VBox(10, label, mediaView);
content.setAlignment(Pos.CENTER);
alert.getDialogPane().setContent(content);

alert.setOnShowing(e -> player.play());
alert.showAndWait();