Stage.setIconified（）和Stage.isIconified（）不能正常工作

Question

我想寫一個簡單的方法來切換我的窗口是否最小化（即圖標化）。我越來越奇怪的行爲。下面是說明問題的可運行代碼。

我在Gnome 3.20.4和XFCE 4.12上得到了相同的結果。我還沒有在任何其他環境中測試過這個。

---

1. 如果沒有最大化窗口，代碼工作正常，但報告的狀態是在次不正確。以下是代碼的輸出。我已將筆記（<--）放在文本輸出與視覺輸出不匹配的行旁邊。

---

視窗未最大化行爲

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 

---

如果最大化了窗口，如所預期的代碼不工作。相反，這是一個三步過程。第一次呼叫圖標化，第二次呼叫恢復，第三次呼叫不作任何視覺改變。

---

視窗最大化的行爲

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 

... 

下面是可運行的代碼：

---

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

看來你在你的程序中的錯字，你有2個階段.isIconified（）的時候你應該有一個

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

應該

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