警报对话框中的JavaFX默认焦点按钮 [英] JavaFX default focused button in Alert Dialog

问题描述

从jdk 8u40开始，我正在使用新的 javafx.scene.control.Alert API来显示确认对话框。在下面的示例中，是按钮默认聚焦而不是否按钮：

Since jdk 8u40, I'm using the new javafx.scene.control.Alert API to display a confirmation dialog. In the example below, "Yes" button is focused by default instead of "No" button:

public boolean showConfirmDialog(String title, String header, String content, AlertType alertType) {
    final Alert alert = new Alert(alertType);
    alert.setTitle(title);
    alert.setHeaderText(header);
    alert.setContentText(content);

    alert.getButtonTypes().clear();
    alert.getButtonTypes().addAll(ButtonType.YES, ButtonType.NO);

    final Optional<ButtonType> result = alert.showAndWait();
    return result.get() == ButtonType.YES;
}

我不知道如何改变它。

编辑：

这里是默认情况下聚焦是按钮的结果屏幕截图：

Here a screenshot of the result where "Yes" button is focused by default :

推荐答案

我不确定以下是否通常这样做，但您可以通过查找按钮并自行设置默认行为来更改默认按钮：

I am not sure if the following is the way to usually do this, but you could change the default button by looking up the buttons and setting the default-behavior yourself:

public boolean showConfirmDialog(String title, String header, String content, AlertType alertType) {
    final Alert alert = new Alert(alertType);
    alert.setTitle(title);
    alert.setHeaderText(header);
    alert.setContentText(content);

    alert.getButtonTypes().clear();
    alert.getButtonTypes().addAll(ButtonType.YES, ButtonType.NO);

    //Deactivate Defaultbehavior for yes-Button:
    Button yesButton = (Button) alert.getDialogPane().lookupButton( ButtonType.YES );
    yesButton.setDefaultButton( false );

    //Activate Defaultbehavior for no-Button:
    Button noButton = (Button) alert.getDialogPane().lookupButton( ButtonType.NO );
    noButton.setDefaultButton( true );

    final Optional<ButtonType> result = alert.showAndWait();
    return result.get() == ButtonType.YES;
}

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