Swing/RoundedTextField のバックアップの現在との差分(No.1)

TITLE:JTextFieldの角を丸める
Posted by terai at 2010-10-04

JTextFieldの角を丸める

 角丸のJTextFieldを作成します。コードはUnleash Your Creativity with Swing and the Java 2D API!、Swing - custom JTextFieldから引用しています。
  • category: swing folder: RoundedTextField title: JTextFieldの角を丸める tags: [JTextField, Border, Shape] author: aterai pubdate: 2010-10-04T21:07:50+09:00 description: JTextFieldの角を丸めて表示するようBorderを設定しています。 image: https://lh5.googleusercontent.com/_9Z4BYR88imo/TQTSMYm3vgI/AAAAAAAAAiY/37FVcZLSXI0/s800/RoundedTextField.png hreflang: 
       href: https://java-swing-tips.blogspot.com/2012/03/rounded-border-for-jtextfield.html
   lang: en

概要

JTextFieldの角を丸めて表示するようBorderを設定しています。

#screenshot

サンプルコード

 
#spanend
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* サンプルコード [#sourcecode]
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#spanadd
#code(link){{
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JTextField textField01 = new JTextField(20) {
  //Unleash Your Creativity with Swing and the Java 2D API!
  //http://java.sun.com/products/jfc/tsc/articles/swing2d/index.html
  @Override protected void paintComponent(Graphics g) {
    int w = getWidth();
    int h = getHeight();
    Graphics2D g2 = (Graphics2D)g;
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g.setColor(getBackground());
    g.fillRoundRect(0, 0, w-1, h-1, h, h);
    g2.setColor(Color.GRAY);
    g2.drawRoundRect(0, 0, w-1, h-1, h, h);
    if (!isOpaque()) {
      int w = getWidth() - 1;
      int h = getHeight() - 1;
      Graphics2D g2 = (Graphics2D) g.create();
      g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                          RenderingHints.VALUE_ANTIALIAS_ON);
      g2.setPaint(UIManager.getColor("TextField.background"));
      g2.fillRoundRect(0, 0, w, h, h, h);
      g2.setPaint(Color.GRAY);
      g2.drawRoundRect(0, 0, w, h, h, h);
      g2.dispose();
    }
    super.paintComponent(g);
  }
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  @Override public void updateUI() {
    super.updateUI();
    setOpaque(false);
    setBorder(BorderFactory.createEmptyBorder(4, 8, 4, 8));
  }
};
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textField01.setOpaque(false);
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textField01.setBorder(BorderFactory.createEmptyBorder(4, 8, 4, 8));
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textField01.setText("aaaaaaaaaaa");
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解説

解説
  • 上: Override: JTextField#paintComponent(...)
  • 下: setBorder(new RoundedCornerBorder())
    • RoundedCornerBorderを設定
    • 角を親コンポーネントの背景色で上書きしているので、背景が画像などの場合はその上に角が描画されてしまう
    • JTextFieldの縁と背景を透明化し、RoundedCornerBorderから取得した図形を描画するように修正 
      #spandel
//http://forums.sun.com/thread.jspa?threadID=260846
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class RoundTextUI extends BasicTextFieldUI {
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  public static ComponentUI createUI(JComponent c) {
    return new RoundTextUI();
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JTextField textField02 = new JTextField(20) {
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  @Override protected void paintComponent(Graphics g) {
    if (!isOpaque() && getBorder() instanceof RoundedCornerBorder) {
      Graphics2D g2 = (Graphics2D) g.create();
      g2.setPaint(getBackground());
      g2.fill(((RoundedCornerBorder) getBorder()).getBorderShape(
          0, 0, getWidth() - 1, getHeight() - 1));
      g2.dispose();
    }
    super.paintComponent(g);
  }
  public void installUI(JComponent c) {
    super.installUI(c);
    c.setBorder(new RoundBorder());
    c.setOpaque(false);
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  @Override public void updateUI() {
    super.updateUI();
    setOpaque(false);
    setBorder(new RoundedCornerBorder());
  }
  protected void paintSafely(Graphics g) {
    JComponent c = getComponent();
    if(!c.isOpaque()) {
      g.setColor(c.getBackground());
      g.fillRoundRect(0, 0, c.getWidth()-1, c.getHeight()-1, c.getHeight(), c.getHeight());
    }
    super.paintSafely(g);
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};
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#spanend
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class RoundedCornerBorder extends AbstractBorder {
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  private static final Color ALPHA_ZERO = new Color(0x0, true);
  @Override public void paintBorder(
      Component c, Graphics g, int x, int y, int width, int height) {
    Graphics2D g2 = (Graphics2D) g.create();
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                        RenderingHints.VALUE_ANTIALIAS_ON);
    Shape border = getBorderShape(x, y, width - 1, height - 1);
    g2.setPaint(ALPHA_ZERO);
    Area corner = new Area(new Rectangle2D.Double(x, y, width, height));
    corner.subtract(new Area(border));
    g2.fill(corner);
    g2.setPaint(Color.GRAY);
    g2.draw(border);
    g2.dispose();
  }
  private static class RoundBorder extends AbstractBorder {
    @Override public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
      Graphics2D g2 = (Graphics2D)g;
      g2.setColor(Color.GRAY);
      g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
      g2.drawRoundRect(x, y, width-1, height-1, height, height);
    }
    @Override public Insets getBorderInsets(Component c) {
      return new Insets(4, 8, 4, 8);
    }
    @Override public Insets getBorderInsets(Component c, Insets insets) {
      insets.left = insets.right = 8;
      insets.top = insets.bottom = 4;
      return insets;
    }
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  public Shape getBorderShape(int x, int y, int w, int h) {
    int r = h; // h / 2;
    return new RoundRectangle2D.Double(x, y, w, h, r, r);
  }
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#spanend
  @Override public Insets getBorderInsets(Component c) {
    return new Insets(4, 8, 4, 8);
  }
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#spanend
  @Override public Insets getBorderInsets(Component c, Insets insets) {
    insets.set(4, 8, 4, 8);
    return insets;
  }
}

参考リンク

参考リンク

コメント

コメント