我试图旋转填充文本标签的GridLayout,以模拟由于操作系统限制而导致的纵向视图.它们所在的JPanel不是方形的,所以当旋转90度时,标签会根据JPanel的尺寸切断.是否可以根据旋转调整布局大小以使其仍适合JPanel？对此研究显示了许多旋转选项,但仅适用于方形JPanels.

为了进一步解释我的问题：当我旋转内部绘制的标签时,它们保持格式化为正常定向的x,y,我希望它格式化布局以适应90度旋转的x,y(所以基本上y和x被翻转).目前我的网格的一部分在旋转后被切断.此外,最终显示应适合当前JPnel中填写的所有13乘24个字母.

编辑：使用模糊的注释显示我需要在旋转后绘制,但这样做会裁剪网格并且不会填充到我的首选大小.

JPanel代码：

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class Screen extends JPanel {

   private JLabel[][] labels = new JLabel[13][24];
   private GridLayout layout;

   public Screen() {

      //setLocation(315,35);
      layout = new GridLayout(13, 24);
      layout.preferredLayoutSize(this);
      //setBounds(315, 65, 243, 350);
      setBounds(315, 65, 243, 350);
      setLayout(layout);

      for (int i = 0; i < 13; i++) {
         for (int j = 0; j < 24; j++) {
            labels[i][j] = new JLabel();
            labels[i][j].setBackground(Color.BLACK);
            add(labels[i][j]);
         }
      }

      //testing new letter
      for (int i = 0; i < 13; i++) {
         for (int j = 0; j < 24; j++) {
            labels[i][j].setText("T");
            labels[i][j].setForeground(Color.GREEN);
         }
      }

      setBackground(Color.black);
      setVisible(true);
      repaint();
   }

   @Override
   public void paintComponent(Graphics g) {
      //Rotates screen graphics to correct orientation
      Graphics2D g2d = (Graphics2D) g;
      int w2 = getWidth() / 2;
      int h2 = getHeight() / 2;
      g2d.rotate(Math.PI / 2, w2, h2);

      super.paintComponent(g);
      setSize(243,350);

   }
}

测试代码：

import javax.swing.JFrame;
import javax.swing.JLayeredPane;

public class RotateTest {

   public static class Frame extends JFrame {

      public Frame() {
         Screen screen = new Screen();

         JLayeredPane pane = new JLayeredPane();
         setUndecorated(false);
         setSize(800, 480);

         setVisible(true);
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         pane.add(screen, 0, 0);
         pane.setVisible(true);
         add(pane);
      }
   }

   public static void main(String[] args) {
      Frame frame = new Frame();
   }

}

解决方法:

旋转组件的过程比仅绘制旋转图像更复杂.有许多相互关联的层面产生合同义务.

例如,设置为要传递到组件进行绘制的Graphics上下文的剪切矩形的大小由组件的当前大小决定,此大小由布局管理器计算,但可以考虑个人的首选大小零件…

这是需要考虑的很多重新布线…叫我懒惰,但如果我能找到一个现成的解决方案,我宁愿使用它,所以基于this example,我可以生成以下…

字段面板周围的红色LineBorder用于显示整个组件已旋转,而不仅仅是它的子项. pack的使用也表明该解决方案仍然履行其对API其余部分的合同义务

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.LineBorder;
import org.jdesktop.jxlayer.JXLayer;
import org.pbjar.jxlayer.demo.TransformUtils;
import org.pbjar.jxlayer.plaf.ext.transform.DefaultTransformModel;

public class RotateExample {

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

    public RotateExample() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                JFrame frame = new JFrame();
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setLayout(new BorderLayout());
                frame.add(new ExamplePane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class ExamplePane extends JPanel {

        private FieldPane fieldPane;
        private DefaultTransformModel transformModel;

        private JButton rotate;
        private double angle;

        public ExamplePane() {

            setLayout(new BorderLayout());

            rotate = new JButton("Rotate");
            rotate.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    transformModel.setRotation(Math.toRadians((angle += 90)));
                    SwingUtilities.getWindowAncestor(ExamplePane.this).pack();
                }
            });


            fieldPane = new FieldPane();

            transformModel = new DefaultTransformModel();
            transformModel.setRotation(Math.toRadians(0));
            transformModel.setScaleToPreferredSize(true);
            JXLayer<JComponent> rotatePane = TransformUtils.createTransformJXLayer(fieldPane, transformModel);

            JPanel content = new JPanel(new GridBagLayout());
            content.add(rotatePane);

            add(rotate, BorderLayout.SOUTH);
            add(content);

        }
    }

    public class FieldPane extends JPanel {

        public FieldPane() {
            setBorder(new LineBorder(Color.RED));
            setLayout(new GridBagLayout());

            JTextField field = new JTextField(10);
            field.setText("Hello world");

            add(field);

        }
    }
}

注意事项

这需要JXLayer(我使用的是版本3),SwingX(我使用的是版本1.6.4)和Piet Blok的优秀示例,网络上似乎不再可用…

我已将JXLayer(版本3)和Piet的示例的所有源代码放入单个zip中,我建议,如果您有兴趣,可以抓取副本并将其存储在安全的地方.

你还需要JHLabs filters

更新

并使用您的屏幕面板(没有自定义绘画)……