调整JScrollPane以考虑Windows任务栏

Question

我开始这个新问题，因为this question已被投票关闭，因为它没有MVCE。

我现在已经将SSCCE问题包括进去了。

请看看下面的代码

import javax.swing.*; 
import java.awt.*; 

public class ScrollPaneTest { 

public static void main(String[] args) { 
    SwingUtilities.invokeLater(new Runnable() { 
     @Override 
     public void run() { 
      JFrame frame=new JFrame(); 
      frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE); 

      JTabbedPane tabbedPane=new JTabbedPane(); 


      tabbedPane.addTab("Tab 1", new JScrollPane(getPanel())); 
      tabbedPane.addTab("Tab 2", new JScrollPane(getPanel())); 

      frame.setContentPane(tabbedPane); 
      frame.pack(); 
      frame.setVisible(true); 
     } 



     private JPanel getPanel() { 
      JPanel panel=new JPanel(); 
      Box box = Box.createVerticalBox(); 
      for (int i = 1; i <= 100; i++) { 
       box.add(new JLabel("This is Label #" + i)); 
      } 
      panel.add(box); 
      return panel; 
     } 
    }); 
    } 
} 

当我运行这段代码，我得到如下图所示

在相同的代码框架，如果我加入

frame.setExtendedState(JFrame.MAXIMIZED_BOTH); 

然后框架出现在任务栏上方。我希望我的JFrame停止在Windows任务栏上方。

Answer 1

这基本上是一个小黑客。

这样做是使用屏幕边界减去它的插入来计算不仅窗口的高度，而且还鼓励窗口出现在可用桌面空间内的位置。

主要的原因，就是我有我的任务栏钉在我屏幕的顶部...

import java.awt.GraphicsConfiguration; 
import java.awt.GraphicsDevice; 
import java.awt.GraphicsEnvironment; 
import java.awt.Insets; 
import java.awt.Rectangle; 
import java.awt.Toolkit; 
import javax.swing.Box; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.JScrollPane; 
import javax.swing.JTabbedPane; 
import javax.swing.SwingUtilities; 
import javax.swing.WindowConstants; 

public class ScrollPaneTest { 

    public static void main(String[] args) { 
     SwingUtilities.invokeLater(new Runnable() { 
      @Override 
      public void run() { 
       JFrame frame = new JFrame(); 
       frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE); 

       JTabbedPane tabbedPane = new JTabbedPane(); 

       tabbedPane.addTab("Tab 1", new JScrollPane(getPanel())); 
       tabbedPane.addTab("Tab 2", new JScrollPane(getPanel())); 

       frame.setContentPane(tabbedPane); 
       frame.pack(); 
       Rectangle viewBounds = getScreenViewableBounds(); 
       frame.setSize(frame.getWidth(), viewBounds.height); 
       frame.setLocation(viewBounds.x, viewBounds.y); 
       frame.setVisible(true); 
      } 

      private JPanel getPanel() { 
       JPanel panel = new JPanel(); 
       Box box = Box.createVerticalBox(); 
       for (int i = 1; i <= 100; i++) { 
        box.add(new JLabel("This is Label #" + i)); 
       } 
       panel.add(box); 
       return panel; 
      } 
     }); 
    } 

    public static Rectangle getScreenViewableBounds() { 

     GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment(); 
     GraphicsDevice gd = ge.getDefaultScreenDevice(); 

     Rectangle bounds = new Rectangle(0, 0, 0, 0); 

     if (gd != null) { 

      GraphicsConfiguration gc = gd.getDefaultConfiguration(); 
      bounds = gc.getBounds(); 

      Insets insets = Toolkit.getDefaultToolkit().getScreenInsets(gc); 

      bounds.x += insets.left; 
      bounds.y += insets.top; 
      bounds.width -= (insets.left + insets.right); 
      bounds.height -= (insets.top + insets.bottom); 

     } 

     return bounds; 

    } 
} 

您也不妨考虑使用Scrollable接口限制可视区域，例如...

import java.awt.Dimension; 
import java.awt.GraphicsConfiguration; 
import java.awt.GraphicsDevice; 
import java.awt.GraphicsEnvironment; 
import java.awt.Insets; 
import java.awt.Rectangle; 
import java.awt.Toolkit; 
import javax.swing.Box; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.JScrollPane; 
import javax.swing.JTabbedPane; 
import javax.swing.Scrollable; 
import javax.swing.SwingUtilities; 
import javax.swing.WindowConstants; 

public class ScrollPaneTest { 

    public static void main(String[] args) { 
     SwingUtilities.invokeLater(new Runnable() { 
      @Override 
      public void run() { 
       JFrame frame = new JFrame(); 
       frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE); 

       JTabbedPane tabbedPane = new JTabbedPane(); 

       tabbedPane.addTab("Tab 1", new JScrollPane(getPanel())); 
       tabbedPane.addTab("Tab 2", new JScrollPane(getPanel())); 

       frame.setContentPane(tabbedPane); 
       frame.pack(); 
       frame.setVisible(true); 
      } 

      private JPanel getPanel() { 
       JPanel panel = new ScrollablePane(); 
       Box box = Box.createVerticalBox(); 
       for (int i = 1; i <= 100; i++) { 
        box.add(new JLabel("This is Label #" + i)); 
       } 
       panel.add(box); 
       return panel; 
      } 
     }); 
    } 

    public static class ScrollablePane extends JPanel implements Scrollable { 

     @Override 
     public Dimension getPreferredScrollableViewportSize() { 
      return new Dimension(200, 400); 
     } 

     @Override 
     public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) { 
      return 32; 
     } 

     @Override 
     public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) { 
      return 32; 
     } 

     @Override 
     public boolean getScrollableTracksViewportWidth() { 
      return false; 
     } 

     @Override 
     public boolean getScrollableTracksViewportHeight() { 
      return false; 
     } 

    } 
}