Swing/JustifiedLabel のバックアップソース(No.16)
- バックアップ一覧
- 差分 を表示
- 現在との差分 を表示
- 現在との差分 - Visual を表示
- バックアップ を表示
- Swing/JustifiedLabel へ行く。
- 1 (2008-03-31 (月) 00:41:18)
- 2 (2008-03-31 (月) 18:36:51)
- 3 (2008-04-03 (木) 12:57:37)
- 4 (2011-03-29 (火) 16:54:25)
- 5 (2012-11-04 (日) 23:04:18)
- 6 (2012-11-16 (金) 18:50:20)
- 7 (2013-01-01 (火) 19:54:35)
- 8 (2014-04-02 (水) 14:49:49)
- 9 (2014-10-05 (日) 03:12:52)
- 10 (2014-11-22 (土) 03:59:58)
- 11 (2015-02-25 (水) 17:37:15)
- 12 (2015-03-24 (火) 16:08:05)
- 13 (2015-06-22 (月) 17:58:09)
- 14 (2015-07-26 (日) 20:02:46)
- 15 (2015-07-27 (月) 01:04:50)
- 16 (2017-04-03 (月) 19:44:28)
- 17 (2018-02-21 (水) 13:05:16)
- 18 (2019-05-22 (水) 19:35:38)
- 19 (2020-02-05 (水) 16:45:49)
- 20 (2021-07-28 (水) 05:21:23)
--- category: swing folder: JustifiedLabel title: JLabelの文字揃え tags: [JLabel, Alignment, GlyphVector] author: aterai pubdate: 2008-03-31T00:41:18+09:00 description: JLabelで、左右中央両端などの文字揃えをテストします。 image: https://lh4.googleusercontent.com/_9Z4BYR88imo/TQTOwQzSk-I/AAAAAAAAAc4/bD-z_hTSHB8/s800/JustifiedLabel.png --- * 概要 [#summary] `JLabel`で、左右中央両端などの文字揃えをテストします。 #download(https://lh4.googleusercontent.com/_9Z4BYR88imo/TQTOwQzSk-I/AAAAAAAAAc4/bD-z_hTSHB8/s800/JustifiedLabel.png) * サンプルコード [#sourcecode] #code(link){{ JLabel l0 = new JLabel("打率"); JLabel l1 = new JLabel("打率", SwingConstants.RIGHT); JLabel l2 = new JustifiedLabel("打率"); JLabel l3 = new JLabel("出塁率", SwingConstants.CENTER); JLabel l4 = new JustifiedLabel("出塁率"); JLabel l5 = new JustifiedLabel("チーム出塁率"); //... class JustifiedLabel extends JLabel { private GlyphVector gvtext; private int prevWidth = -1; public JustifiedLabel() { this(null); } public JustifiedLabel(String str) { super(str); } @Override public void setText(String text) { super.setText(text); prevWidth = -1; } @Override protected void paintComponent(Graphics g) { Graphics2D g2 = (Graphics2D) g.create(); Insets ins = getInsets(); int w = getSize().width - ins.left - ins.right; if (w != prevWidth) { gvtext = getJustifiedGlyphVector( w, getText(), getFont(), g2.getFontRenderContext()); prevWidth = w; } if (Objects.nonNull(gvtext)) { g2.setPaint(getBackground()); g2.fillRect(0, 0, getWidth(), getHeight()); g2.setPaint(getForeground()); g2.drawGlyphVector(gvtext, ins.left, ins.top + getFont().getSize()); } else { super.paintComponent(g); } g2.dispose(); } private GlyphVector getJustifiedGlyphVector( int width, String str, Font font, FontRenderContext frc) { GlyphVector gv = font.createGlyphVector(frc, str); Rectangle2D r = gv.getVisualBounds(); float jwidth = (float) width; float vwidth = (float) r.getWidth(); if (jwidth > vwidth) { int num = gv.getNumGlyphs(); float xx = (jwidth - vwidth) / (float) (num - 1); float xpos = num == 1 ? (jwidth - vwidth) * .5f : 0f; Point2D gmPos = new Point2D.Double(0d, 0d); for (int i = 0; i < num; i++) { GlyphMetrics gm = gv.getGlyphMetrics(i); gmPos.setLocation(xpos, 0); gv.setGlyphPosition(i, gmPos); xpos += gm.getAdvance() + xx; } return gv; } return null; } } }} * 解説 [#explanation] `JLabel`の文字揃えは、デフォルトが左揃えで、その他に右揃え、中央揃えがあります。両端揃え(文字の均等割り付け)は存在しないようなので、上記のサンプルでは、`JustifiedLabel`(幅が足りない場合などは、通常の`JLabel`と同様にクリップ)を作成して使用しています。 ---- - `JTextPane`に挿入、一文字の場合などのテスト #code{{ //package example; //-*- mode:java; encoding:utf-8 -*- // vim:set fileencoding=utf-8: //@homepage@ import java.awt.*; import java.awt.event.*; import java.awt.font.*; import java.awt.geom.*; import javax.swing.*; import javax.swing.border.*; import javax.swing.text.*; public class JustifiedLabelDemo { public JComponent makeUI() { String s = "\u2605"; JTextPane textPane = new JTextPane(); textPane.insertComponent(new JustifiedLabel(s)); textPane.replaceSelection(": 111\n"); textPane.insertComponent(new JustifiedLabel(s + s)); textPane.replaceSelection(": 2222222\n"); textPane.insertComponent(new JustifiedLabel(s + s + s)); textPane.replaceSelection(": 3333\n"); textPane.insertComponent(new JustifiedLabel(s + s + s + s)); textPane.replaceSelection(": 4444444\n"); textPane.insertComponent(new JustifiedLabel(s + s + s + s + s)); textPane.replaceSelection(": 555\n"); return new JScrollPane(textPane); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { createAndShowGUI(); } }); } public static void createAndShowGUI() { UIManager.put("swing.boldMetal", Boolean.FALSE); JFrame f = new JFrame(); f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); f.getContentPane().add(new JustifiedLabelDemo().makeUI()); f.setSize(320, 240); f.setLocationRelativeTo(null); f.setVisible(true); } } class JustifiedLabel extends JLabel { private GlyphVector gvtext; private int prev_width = -1; public JustifiedLabel() { this(null); } public JustifiedLabel(String str) { super(str); Dimension d = getPreferredSize(); int baseline = getBaseline(d.width, d.height); setAlignmentY(baseline / (float) d.height); } @Override public Dimension getMinimumSize() { return getPreferredSize(); } @Override public Dimension getPreferredSize() { Dimension d = super.getPreferredSize(); d.width = getWidth(); return d; } @Override public int getWidth() { return 120; } @Override protected void paintComponent(Graphics g) { Graphics2D g2 = (Graphics2D) g; Insets i = getInsets(); int w = getWidth() - i.left - i.right; if (w != prev_width) { gvtext = getJustifiedGlyphVector(getText(), getFont(), g2.getFontRenderContext()); prev_width = w; } if (gvtext != null) { g2.drawGlyphVector(gvtext, i.left, i.top + getFont().getSize()); } else { super.paintComponent(g); } } private GlyphVector getJustifiedGlyphVector(String str, Font font, FontRenderContext frc) { GlyphVector gv = font.createGlyphVector(frc, str); Rectangle2D r = gv.getVisualBounds(); float jwidth = (float) getWidth(); float vwidth = (float) r.getWidth(); if (jwidth < vwidth) return null; int num = gv.getNumGlyphs(); float xx = (jwidth - vwidth) / (float) (num - 1); float xpos = num == 1 ? (jwidth - vwidth) * .5f : 0f; Point2D gmPos = new Point2D.Double(0d, 0d); if (num == 1) System.out.println(gmPos); for (int i = 0; i < num; i++) { GlyphMetrics gm = gv.getGlyphMetrics(i); gmPos.setLocation(xpos, 0); gv.setGlyphPosition(i, gmPos); xpos += gm.getAdvance() + xx; } return gv; } } }} * 参考リンク [#reference] - [[JTableのセル内文字列を両端揃えにする>Swing/InterIdeographJustify]] -- [http://docs.oracle.com/javase/jp/6/api/java/awt/font/TextLayout.html#getJustifiedLayout(float) TextLayout#getJustifiedLayout(float)]を使用して`JTable`のセルで両端揃えを行うサンプル * コメント [#comment] #comment #comment