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我有一个有时会显示模式对话框的应用程序，但是在收到外部消息后，我希望删除该对话框并将其替换为另一个对话框，因为情况已经改变并且第一个对话框不再适用。

但是，第二个对话框没有正确重绘，父阶段也没有。

对话框移动时背景不会重新绘制

我在 jdk-8u11-windows-x64 上看到了这个问题，带有控件 fx controlsfx-8.0.6 和 controls-fx-8.20.8。我设法在我的应用程序之外重新创建了这个问题

import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.stage.Stage;

import org.controlsfx.dialog.Dialog;

public class NestedEventLoop extends Application {

    private Dialog firstDialog;
    private Object stage;

    @Override
    public void start(Stage stage) throws Exception {
        Button button = new Button("press");
        button.setOnAction((e) -> {
            firstDialog = new Dialog(stage, "dialog", false);
            firstDialog.setContent("Content...");
            openAnotherDialogLater();
            firstDialog.show();

        });
        stage.setScene(new Scene(button));
        stage.show();
        this.stage = stage;
    }

    private void openAnotherDialogLater() {
        Runnable openDialog = () -> {
            firstDialog.hide();
            Dialog anotherDialog = new Dialog(stage, "anotherDialog", false);
            anotherDialog.show();
        };

        Executors.newScheduledThreadPool(1).schedule(() -> {
            Platform.runLater(openDialog);
        }, 2, TimeUnit.SECONDS);
    }

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

我对正在发生的事情的分析。

  • 打开第一个对话框时，JavaFX 线程进入“嵌套事件循环”
  • 当需要第二个对话框时，调用 hide() 不会导致第一个嵌套事件循环退出
  • 在第一个事件循环之上创建了一个新的嵌套事件循环 - 这似乎是重绘问题的原因。

我的问题

  • 如何在打开第二个对话框之前关闭第一个对话框并退出第一个嵌套循环？- 没有任意睡眠等。

在打开第二个对话框时来自 jconsole 的堆栈跟踪。

com.sun.glass.ui.win.WinApplication._enterNestedEventLoopImpl(Native Method)
com.sun.glass.ui.win.WinApplication._enterNestedEventLoop(WinApplication.java:142)
com.sun.glass.ui.Application.enterNestedEventLoop(Application.java:500)
com.sun.glass.ui.EventLoop.enter(EventLoop.java:107)
com.sun.javafx.tk.quantum.QuantumToolkit.enterNestedEventLoop(QuantumToolkit.java:542)
javafx.stage.Stage.showAndWait(Stage.java:455)
org.controlsfx.dialog.HeavyweightDialog$1.showAndWait(HeavyweightDialog.java:87)
org.controlsfx.dialog.HeavyweightDialog.show(HeavyweightDialog.java:284)
org.controlsfx.dialog.Dialog.show(Dialog.java:384)
NestedEventLoop.lambda$1(NestedEventLoop.java:37)
NestedEventLoop$$Lambda$7/7730735.run(Unknown Source)
com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:301)
com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:298)
java.security.AccessController.doPrivileged(Native Method)
com.sun.javafx.application.PlatformImpl$6.run(PlatformImpl.java:298)
com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
com.sun.glass.ui.win.WinApplication._enterNestedEventLoopImpl(Native Method)
com.sun.glass.ui.win.WinApplication._enterNestedEventLoop(WinApplication.java:142)
com.sun.glass.ui.Application.enterNestedEventLoop(Application.java:500)
com.sun.glass.ui.EventLoop.enter(EventLoop.java:107)
com.sun.javafx.tk.quantum.QuantumToolkit.enterNestedEventLoop(QuantumToolkit.java:542)
javafx.stage.Stage.showAndWait(Stage.java:455)
org.controlsfx.dialog.HeavyweightDialog$1.showAndWait(HeavyweightDialog.java:87)
org.controlsfx.dialog.HeavyweightDialog.show(HeavyweightDialog.java:284)
org.controlsfx.dialog.Dialog.show(Dialog.java:384)
NestedEventLoop.lambda$0(NestedEventLoop.java:24)
NestedEventLoop$$Lambda$1/12269754.handle(Unknown Source)
com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
javafx.event.Event.fireEvent(Event.java:204)
javafx.scene.Node.fireEvent(Node.java:8175)
javafx.scene.control.Button.fire(Button.java:185)
com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
javafx.event.Event.fireEvent(Event.java:204)
javafx.scene.Scene$MouseHandler.process(Scene.java:3746)
javafx.scene.Scene$MouseHandler.access$1800(Scene.java:3471)
javafx.scene.Scene.impl_processMouseEvent(Scene.java:1695)
javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2486)
com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:314)
com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:243)
java.security.AccessController.doPrivileged(Native Method)
com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:345)
com.sun.glass.ui.View.handleMouseEvent(View.java:526)
com.sun.glass.ui.View.notifyMouse(View.java:898)
com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
com.sun.glass.ui.win.WinApplication.access$300(WinApplication.java:39)
com.sun.glass.ui.win.WinApplication$4$1.run(WinApplication.java:112)
java.lang.Thread.run(Thread.java:745)

更新：自从写下这个问题以来，我发现了一种解决方法，即使用 runLater() 关闭第一个对话框，然后使用另一个 runLater() 打开新对话框。不过，我仍然对其他人对此的想法感兴趣。

private void openAnotherDialogLater() {
    Runnable closeDialog = () -> {
        firstDialog.hide();
    };
    Runnable openDialog = () -> {
        Dialog anotherDialog = new Dialog(stage, "anotherDialog", false);
        anotherDialog.show();
    };

    Executors.newScheduledThreadPool(1).schedule(() -> {
        Platform.runLater(closeDialog);
        Platform.runLater(openDialog);
    }, 2, TimeUnit.SECONDS);
}
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1 回答 1

2

不管我的评论如何，我建议在 JDK 8u40 中使用新的Dialogs API 。您可以在第一个对话框的结果类型中表示外部消息的到达，如果消息到达，则打开第二个对话框作为处理第一个对话框结果的一部分：

enum Result { MSG_ARRIVED, ... }

Dialog<Result> firstDialog = ...;

firstDialog.showAndWait().ifPresent(res -> {
    if(res == Result.MSG_ARRIVED) {
        anotherDialog = ...;
        anotherDialog.show();
    }
});

当消息到达时，只需将第一个对话框的结果设置为 MSG_ARRIVD 并关闭对话框：

Platform.runLater(() -> {
    firstDialog.setResult(Result.MSG_ARRIVED);
    firstDialog.hide();
});
于 2014-11-22T17:45:12.787 回答