- 追加された行はこの色です。
- 削除された行はこの色です。
TITLE:JComboBoxのItemを左右にクリップして配置
#navi(../)
RIGHT:Posted by [[aterai]] at 2005-09-12
*JComboBoxのItemを左右にクリップして配置 [#td747fe0]
Posted by [[terai]] at 2005-09-12
#contents
**概要 [#p068c669]
JComboBoxのItemにテキストをクリップして左右に分けて配置します。
-&jnlp;
-&jar;
-&zip;
#screenshot
//#screenshot
#ref(http://lh5.ggpht.com/_9Z4BYR88imo/TQTJSTVvNXI/AAAAAAAAAUI/RNbSh6R4xi8/s800/ClippedLRComboBox.png)
**サンプルコード [#n26d00a1]
#code{{
class MyCellRenderer extends JPanel implements ListCellRenderer {
private final JLabel lbl1 = new JLabel();
private final JLabel lbl2 = new JLabel();
private final Color cfc = UIManager.getColor("ComboBox.foreground");
private final Color cbc = UIManager.getColor("ComboBox.background");
private final Color csfc = UIManager.getColor("ComboBox.selectionForeground");
private final Color csbc = UIManager.getColor("ComboBox.selectionBackground");
private final Color cdfc = UIManager.getColor("ComboBox.disabledForeground");
public MyCellRenderer(Dimension dim, int rightw) {
class LRComboCellRenderer extends JPanel implements ListCellRenderer {
private final JLabel leftLabel = new JLabel();
private final JLabel rightLabel = new JLabel();
private final Color cfc = UIManager.getColor("ComboBox.foreground");
private final Color cbc = UIManager.getColor("ComboBox.background");
private final Color csfc = UIManager.getColor("ComboBox.selectionForeground");
private final Color csbc = UIManager.getColor("ComboBox.selectionBackground");
private final Color cdfc = UIManager.getColor("ComboBox.disabledForeground");
private final JComboBox combo;
public LRComboCellRenderer(JComboBox combo, int rightWidth, int labelHeight) {
super(new BorderLayout());
lbl1.setOpaque(true);
lbl2.setOpaque(true);
this.combo = combo;
this.setBorder(BorderFactory.createEmptyBorder());
this.setOpaque(true);
lbl1.setBorder(BorderFactory.createEmptyBorder(0,2,0,0));
lbl2.setPreferredSize(new Dimension(rightw, 0));
lbl2.setBorder(BorderFactory.createEmptyBorder(0,5,0,0));
this.add(lbl1);
this.add(lbl2, BorderLayout.EAST);
this.setPreferredSize(dim);
leftLabel.setOpaque(true);
leftLabel.setBorder(BorderFactory.createEmptyBorder(0,2,0,0));
rightLabel.setOpaque(true);
rightLabel.setBorder(BorderFactory.createEmptyBorder(0,2,0,2));
rightLabel.setPreferredSize(new Dimension(rightWidth, labelHeight));
rightLabel.setHorizontalAlignment(SwingConstants.RIGHT);
this.add(leftLabel);
this.add(rightLabel, BorderLayout.EAST);
}
public Component getListCellRendererComponent(
JList list, Object value, int index,
boolean isSelected, boolean cellHasFocus) {
//@Override
public Component getListCellRendererComponent(JList list, Object value,
int index, boolean isSelected,
boolean cellHasFocus) {
LRItem item = (LRItem)value;
lbl1.setText(item.getLeftText());
lbl2.setText(item.getRightText());
lbl1.setBackground(isSelected ? csbc : cbc);
lbl2.setBackground(isSelected ? csbc : cbc);
this.setBackground(isSelected ? csbc : cbc);
lbl1.setForeground(isSelected ? csfc : cfc);
lbl2.setForeground(cdfc);
leftLabel.setText(item.getLeftText());
rightLabel.setText(item.getRightText());
leftLabel.setBackground(isSelected? csbc:cbc);
rightLabel.setBackground(isSelected? csbc:cbc);
this.setBackground(isSelected? csbc:cbc);
leftLabel.setForeground(isSelected? csfc:cfc);
rightLabel.setForeground(cdfc);
if(index==-1) {
Dimension dim = combo.getSize();
if(dim.width!=oldwidth) {
int count = combo.getItemCount()-1;
Insets i = combo.getInsets();
int w = dim.width-i.left-i.right;
int h = dim.height-i.top-i.bottom;
list.setPreferredSize(new Dimension(w, h*count));
oldwidth = dim.width;
}
}
return this;
}
private int oldwidth = -1;
}
}}
**解説 [#y1b479cc]
上記のサンプルでは、JLabelを二つ並べたJPanelをレンダラーにすることで、Itemに設定した文字列を左右に表示しています。このため文字列が長い場合、JLabelがこれを自動的にクリップしてくれます。
**参考リンク [#w60ad6dd]
-[[JComboBoxのItemを左右に配置>Swing/LRComboBox]]
--こちらはhtmlのtableタグを使用して同様の表示(クリップはしない)を行っています。
**コメント [#n7dbe41e]
- ポップアップリストが更新されなくなって？、うまくクリップできなくなっていたのを修正。 -- [[aterai]] &new{2008-08-13 (水) 15:14:12};
#comment