Swing/BrickLayout のバックアップの現在との差分(No.6)

GridBagLayoutを使ってレンガ状に配置

サンプルコード

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* サンプルコード [#sourcecode]
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#code(link){{
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JPanel panel = new JPanel(new GridBagLayout());
panel.setBorder(BorderFactory.createTitledBorder("Brick Layout"));
GridBagConstraints c = new GridBagConstraints();
c.fill = GridBagConstraints.HORIZONTAL;
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//c.weightx = 1.0; c.weighty = 0.0;
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for(int i=0;i<SIZE;i++) {
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  int x = i & 1; //= (i%2==0)?0:1;
  for(int j=0;j<SIZE;j++) {
    c.gridy = i;
    c.gridx = 2*j+x;
    c.gridwidth = 2;
    panel.add(new JButton(" "),c);
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c.gridy = GridBagConstraints.RELATIVE;
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for (int y = 0; y < YSIZE; y++) {
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  // // c.gridy = GridBagConstraints.RELATIVE; // c.gridy = y;
  // int d = y & 0b1; // = y % 2 == 0 ? 0 : 1; // start x offset
  // if (d == 1) {
  //   c.gridwidth = 1;
  //   c.gridx = 0;
  //   panel.add(new JButton("a"), c);
  // }
  c.gridx = y & 0b1; // start x offset
  c.gridwidth = WIDTH;
  for (int x = 0; x < XSIZE; x++) {
    panel.add(new JButton(" "), c);
    c.gridx += WIDTH;
  }
  // if (d == 0) {
  //   c.gridwidth = 1;
  //   panel.add(new JButton("c"), c);
  // }
}
#spandel
//<blockquote cite="http://forums.sun.com/thread.jspa?threadID=5364641">
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//<dummy-row>
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// GridBagLayout to create a board
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// https://community.oracle.com/thread/1357310
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// <guide-row>
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c.gridwidth = 1;
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c.gridy = 10;
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for(c.gridx=0; c.gridx<=2*SIZE; c.gridx++)
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// c.gridy = GridBagConstraints.REMAINDER;
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for (c.gridx = 0; c.gridx <= WIDTH * XSIZE; c.gridx++) {
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  panel.add(Box.createHorizontalStrut(24), c);
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//</dummy-row>
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//</blockquote>
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}
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// </guide-row>
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• 以下、Swing - GridBagLayout to create a boardのDarryl.Burkeさんの投稿を引用
  • A column (or row) in a GridBagLayout is not well defined unless there is at least one component which occupies only that column (or row). All your rows have components spanning 2 columns. 以下、Swing - GridBagLayout to create a boardのDarryl.Burkeさんの投稿を引用

A column (or row) in a GridBagLayout is not well defined unless there is at least one component which occupies only that column (or row). All your rows have components spanning 2 columns.

• Swing - GridBagLayout to create a board 列の基準となるガイド行は、どこでも(先頭でも最後でも)構わないようです。

• -

• 同様に指定した幅、かつ高さ0のセルで構成されたガイド行を作成してJButtonをキーボード風に配置するサンプル
  • GridBagLayoutを使ってJButtonをキーボード状に配置するに移動