javafx - Stage.setIconified() 和 Stage.isIconified() 运行不正常

Question

我正在尝试编写一个简单的方法来切换我的窗口是否最小化(即图标化)。我有奇怪的行为。下面是说明问题的可运行代码。

我在 Gnome 3.20.4 和 XFCE 4.12 上得到了相同的结果。我还没有在任何其他环境中测试过这个。

如果窗口未最大化，则代码按预期工作，但有时报告的状态不正确。这是下面代码的输出。我在文本输出与视觉输出不匹配的行旁边放置了注释( <-- )。

Windows 未最大化行为

Before call  (Note: Window appears iconified)
    isIconified(): true
    isMaximized(): true

Setting iconified to false

After call (Note: Window now appears restored, not maximized) 
    isIconified(): true   <-- The window is visually not iconified 
    isMaximized(): true   <-- The window is visually not maximized


Before call (Note: Window still appears restored, not maximized) 
    isIconified(): false  <-- One second later, the report is accurate
    isMaximized(): false

Setting iconified to true

After call  (Note: Window now appears iconified) 
    isIconified(): true
    isMaximized(): true

如果窗口最大化，则代码不会按预期工作。相反，它是一个三步过程。第一个调用图标化，第二个调用恢复，第三个调用没有任何视觉变化。

Windows 最大化行为

Before call (Note: Window appears iconified)
    isIconified(): true
    isMaximized(): true

Setting iconified to false

After call (Note: Window appears maximized)
    isIconified(): true <-- Does not match visual
    isMaximized(): true


Before call (Note: Window appears maximized)
    isIconified(): true <-- Does not match visual
    isMaximized(): true

Setting iconified to false

After call (Note: Window appears maximized)
    isIconified(): false
    isMaximized(): false  <-- Does not match visual


Before call (Note: Window appears maximized)
    isIconified(): false
    isMaximized(): false  <-- Does not match visual

Setting iconified to true

After call (Note: Window appears iconified)
    isIconified(): true
    isMaximized(): true

<Now it loops>

Before call (Note: Window appears iconified)
    isIconified(): true
    isMaximized(): true

Setting iconified to false

After call (Note: Window appears maximized)
    isIconified(): true  <-- Does not match visual
    isMaximized(): true

...

这是可运行的代码:

import javafx.application.Application;
import javafx.application.Platform;
import javafx.stage.Stage;

public class StageTest extends Application {

    Stage stage;

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

    @Override
    public void start ( Stage stage ) throws Exception {
        this.stage = stage;
        stage.setResizable( true );
        stage.show( );

        Thread thread = new Thread ( () -> {
            while ( true ) {
                Platform.runLater( () -> {
                    toggleMinimized();
                } );
                try {
                    Thread.sleep ( 1000 );
                } catch ( InterruptedException e ) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        });

        thread.setDaemon( true );
        thread.start();

    }

    public void toggleMinimized() {

        System.out.println ( "Before call" );
        System.out.println ( "\tisIconified(): " + stage.isIconified() );
        System.out.println ( "\tisMaximized(): " + stage.isIconified() );
        System.out.println ();

        if ( stage.isIconified() ) {
            System.out.println ( "Setting iconified to false" );
            System.out.println ();
            stage.setIconified( false );
        } else {
            System.out.println ( "Setting iconified to true" );
            System.out.println ();
            stage.setIconified( true );
        }


        System.out.println ( "After call" );
        System.out.println ( "\tisIconified(): " + stage.isIconified() );
        System.out.println ( "\tisMaximized(): " + stage.isMaximized() );
        System.out.println ();
        System.out.println ();
    }
}

Answer 1

看来你的程序有错别字你有 2 个 stage.isIconified()'s 当你应该有一个

public void toggleMinimized() {
    System.out.println ( "Before call" );
    System.out.println ( "\tisIconified(): " + stage.isIconified() );
    System.out.println ( "\tisMaximized(): " + stage.isIconified() );

它应该是

public void toggleMinimized() {
    System.out.println ( "Before call" );
    System.out.println ( "\tisIconified(): " + stage.isIconified() );
    System.out.println ( "\tisMaximized(): " + stage.isMaximized() );