为什么这个字体在Java中如此之大?

时间:2013-05-16 20:03:05

标签: java swing fonts jtextcomponent letter-spacing

我正在尝试将OpenDyslexic用作Swing应用程序中的字体选项。但令人惊讶的是,OpenDyslexic看起来比同一点大小的任何其他字体大得多,即使它在其他应用程序中看起来通常很大。我尝试了一些其他OpenType字体,它们看起来并不特别大或小。为什么OpenDyslexic在Java中如此之大,如何让Java正常大小以便我不需要特殊情况下OpenDyslexic的大小?

在所有操作系统上的Oracle JRE(我试过1.7.0_11,1.7.0_15和最新的1.7.0_21)上,当Java使用Font.createFont加载字体文件时,字体太大了。但是,当我安装字体到操作系统时,所有3个平台上的行为都不同:

  • 在Linux中,将字体安装到~/.fonts没有任何好处。在安装字体之前和安装之后,屏幕截图看起来一样。
  • 在Windows中,安装字体会修复字体字形,但字体间距仍然太大!见下面的截图。
  • 在OS X中,安装字体会修复它!它看起来像OS X上的普通大小的字体。

更新:有趣的是,OpenJDK(Linux中的7u21 Ubuntu软件包和OS X上的obuildfactory版本)确实显示错误。 OpenFDK上的15pt OpenDyslexic'm'应该是15px宽,无论是从文件创建字体还是操作系统处理字体时都是如此。该错误发布在最新的Oracle JRE中,但不在最新的OpenJDK中。

这是我的示例程序。请注意,要尝试它,您需要将OpenDyslexic文件放入资源/。或者,将OpenDyslexic安装到您的系统中,然后取出registerFonts()电话。

SansSerif is normal size OpenDyslexic is huge at the same point size After installing OpenDyslexic on Windows, it looks stupid After installing font on OS X: perfect!

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Font;
import java.awt.FontFormatException;
import java.awt.GraphicsEnvironment;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Locale;

import javax.swing.DefaultComboBoxModel;
import javax.swing.DefaultListCellRenderer;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
import javax.swing.WindowConstants;
import javax.swing.event.ListDataEvent;
import javax.swing.event.ListDataListener;

public class FontFrame {
    /**
     * Register extra fonts from resources. If you already have it installed on
     * the computer, you can skip this.
     */
    private static void registerFonts() {
        String[] resources = {
            "OpenDyslexic-Regular.otf",
            "OpenDyslexic-Italic.otf",
            "OpenDyslexic-Bold.otf",
            "OpenDyslexic-BoldItalic.otf"
        };
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        for (String filename: resources) {
            InputStream stream = FontFrame.class.getResourceAsStream("resources/" + filename);
            try {
                Font font = Font.createFont(Font.TRUETYPE_FONT, stream);
                ge.registerFont(font);
            } catch (FontFormatException | IOException e) {
                throw new IllegalStateException(e);
            }
        }
    }
    private static void createUI(boolean allFonts) {
        final JTextArea textArea = new JTextArea(
                "Font created to help dyslexic readers. " +
                "Bottom heavy and unique character shapes help " +
                "prevent letters and numbers from being confused.");
        textArea.setWrapStyleWord(true);
        textArea.setLineWrap(true);
        final DefaultComboBoxModel<String> model = new DefaultComboBoxModel<>();
        if (allFonts) {
            GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
            HashSet<Object> seenFamilies = new HashSet<>();
            Font[] fonts = ge.getAllFonts();
            for (Font font: fonts) {
                String familyName = font.getFamily(Locale.ENGLISH);
                if (seenFamilies.contains(familyName))
                    continue;
                seenFamilies.add(familyName);
                model.addElement(familyName);
            }
        } else {
            model.addElement("SansSerif");
            model.addElement("OpenDyslexic");
        }

        final int fontSize = 15;
        textArea.setFont(new Font("SansSerif", Font.PLAIN, fontSize));
        model.addListDataListener(new ListDataListener() {
            @Override public void intervalRemoved(ListDataEvent e) {}
            @Override public void intervalAdded(ListDataEvent e) {}
            @Override public void contentsChanged(ListDataEvent e) {
                if (e.getIndex0() == -1 && e.getIndex1() == -1) {
                    SwingUtilities.invokeLater(new Runnable() { @Override public void run() {
                        String selectedFamily = (String) model.getSelectedItem();
                        Font font = new Font(selectedFamily, Font.PLAIN, fontSize);
                        textArea.setFont(font);
                    }});
                }
            }
        });
        JComboBox<String> familyChooser = new JComboBox<>(model);
        familyChooser.setMaximumRowCount(50);
        familyChooser.setRenderer(new DefaultListCellRenderer() {
            private static final long serialVersionUID = 1L;
            public Component getListCellRendererComponent(JList<?> list,
                    Object value, int index, boolean isSelected,
                    boolean cellHasFocus) {
                Component comp = super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
                String familyName = (String) value;
                Font font = new Font(familyName, Font.PLAIN, fontSize);
                comp.setFont(font);
                return comp;
            }
        });

        JPanel jpanel = new JPanel();
        jpanel.setLayout(new BorderLayout());
        jpanel.add(familyChooser, BorderLayout.NORTH);
        jpanel.add(textArea, BorderLayout.CENTER);
        JFrame jframe = new JFrame();
        jframe.getContentPane().add(jpanel);
        jframe.setSize(300, 300);
        jframe.invalidate();
        jframe.setVisible(true);
        jframe.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
    }
    public static void main(String[] args) throws InvocationTargetException, InterruptedException {
        registerFonts();
        final boolean allFonts = Arrays.asList(args).contains("--all");
        SwingUtilities.invokeAndWait(new Runnable() {
            @Override public void run() {
                createUI(allFonts);
            }
        });
    }
}

1 个答案:

答案 0 :(得分:1)

并非每个Java版本都支持OpenType(参见this overview)。如果您可以在没有OpenType功能的情况下使用,最简单的解决方案是将字体文件转换为TTF。似乎有几个free online options来帮助你,如果这解决了你的问题,你仍然可以投资专业软件,以获得更好的结果。