[英]How to call setOnCloseRequest from anywhere to close application if an error occurs in JavaFX?
[英]Alert Box For When User Attempts to close application using setOnCloseRequest in JavaFx
我试图在退出之前提示用户确认他们想要关闭程序。 如果任务仍在执行,我想确认仍然希望退出或让他们有机会在退出之前完成任务。 我使用了setOnCloseRequest,但它没有用。 我使用了event.consume,似乎只是禁用了[x]按钮。 任何建议表示赞赏。 我在这里发现了一个类似的问题对我不起作用 - > 没有函数的JavaFX stage.setOnCloseRequest?
Public class Sample extends Application {
@Override
public void start(Stage stage) throws Exception {
stage.setOnCloseRequest(event -> {
NewScanView checkScan = new NewScanView();
boolean isScanning = checkScan.isScanning();
Alert alert = new Alert(AlertType.CONFIRMATION);
alert.setTitle("Close Confirmation");
alert.setHeaderText("Cancel Creation");
alert.setContentText("Are you sure you want to cancel creation?");
if (isWorking == true){
Optional<ButtonType> result = alert.showAndWait();
if (result.get() == ButtonType.OK){
stage.close();
}
if(result.get()==ButtonType.CANCEL){
alert.close();
}
}
});
stage.setHeight(600);
stage.setWidth(800);
stage.setTitle("Title");
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}
这个答案是基于Javafx内部关闭请求的答案。 这个问题与这个问题不同,但答案非常相似。
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.StackPane;
import javafx.stage.*;
import javafx.stage.WindowEvent;
import java.util.Optional;
public class CloseConfirm extends Application {
private Stage mainStage;
@Override
public void start(Stage stage) throws Exception {
this.mainStage = stage;
stage.setOnCloseRequest(confirmCloseEventHandler);
Button closeButton = new Button("Close Application");
closeButton.setOnAction(event ->
stage.fireEvent(
new WindowEvent(
stage,
WindowEvent.WINDOW_CLOSE_REQUEST
)
)
);
StackPane layout = new StackPane(closeButton);
layout.setPadding(new Insets(10));
stage.setScene(new Scene(layout));
stage.show();
}
private EventHandler<WindowEvent> confirmCloseEventHandler = event -> {
Alert closeConfirmation = new Alert(
Alert.AlertType.CONFIRMATION,
"Are you sure you want to exit?"
);
Button exitButton = (Button) closeConfirmation.getDialogPane().lookupButton(
ButtonType.OK
);
exitButton.setText("Exit");
closeConfirmation.setHeaderText("Confirm Exit");
closeConfirmation.initModality(Modality.APPLICATION_MODAL);
closeConfirmation.initOwner(mainStage);
// normally, you would just use the default alert positioning,
// but for this simple sample the main stage is small,
// so explicitly position the alert so that the main window can still be seen.
closeConfirmation.setX(mainStage.getX());
closeConfirmation.setY(mainStage.getY() + mainStage.getHeight());
Optional<ButtonType> closeResponse = closeConfirmation.showAndWait();
if (!ButtonType.OK.equals(closeResponse.get())) {
event.consume();
}
};
public static void main(String[] args) {
launch(args);
}
}
答案确实使用了event.consume()
,你说你尝试过并且没有为你工作(虽然我不知道为什么不能,因为它对我来说这个示例代码很合适)。
尝试创建一个弹出框(如果没有),单击退出时将提示用户。 如果他们选择“Ok”然后调用exit方法,否则返回到你正在做的任何事情。
这是一个网页,其中包含一个示例,说明如何编写弹出文件,因为文档完全是垃圾。 https://gist.github.com/jewelsea/1926196
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