[英]JList display error with custom ListCellRenderer
我在JList上使用自定义ListCellRenderer遇到麻烦。 如果“列表”中只有一项,则该单元格将正确显示,但是如果有一项以上,则每个单元格的接缝处将所有单元格的内容相互重叠,如下所示:
我的CellRenderer看起来像这样:
public class SendungsCellRenderer extends JPanel implements ListCellRenderer {
private EmptyBorder eb = new EmptyBorder(5, 2, 5, 2);
private LineBorder lb = new LineBorder(new Color(255,255,255), 5);
@Override
public Component getListCellRendererComponent(JList list, Object value,
int index, boolean isSelected, boolean cellHasFocus) {
uiSendungsbutton p = (uiSendungsbutton) value;
if(isSelected){
this.setBackground(new Color(200,200,250));
this.setBorder(new CompoundBorder(lb, new StrokeBorder(new BasicStroke())));
}else{
this.setBackground(new Color(252,252,252));
this.setBorder(lb);
}
this.setLayout(p.getLayout());
this.add(p.getNamePnl(),BorderLayout.NORTH);
this.add(p.getKdnrPnl(), BorderLayout.CENTER);
return this;
}
}
它使用
list_Sendung = new JList(getSendungen().toArray());
list_Sendung.setVisibleRowCount(1);
list_Sendung.setValueIsAdjusting(true);
list_Sendung.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
list_Sendung.setCellRenderer(new SendungsCellRenderer());
方法getSendungen()
返回uiSendungsbutton
的ArrayList。
如何获得JList以便在其自己的单元格中正确显示每个项目?
问题是,被用于所有细胞相同的细胞渲染器,并为每一个新细胞,你的组件添加到this
试。 为了解决这个问题,从删除所有组件this
每一次,使用removeAll
。 修复后,您的代码将如下所示:
public class SendungsCellRenderer extends JPanel implements ListCellRenderer {
private EmptyBorder eb = new EmptyBorder(5, 2, 5, 2);
private LineBorder lb = new LineBorder(new Color(255,255,255), 5);
@Override
public Component getListCellRendererComponent(JList list, Object value,
int index, boolean isSelected, boolean cellHasFocus) {
this.removeAll();
uiSendungsbutton p = (uiSendungsbutton) value;
if(isSelected){
this.setBackground(new Color(200,200,250));
this.setBorder(new CompoundBorder(lb, new StrokeBorder(new BasicStroke())));
}else{
this.setBackground(new Color(252,252,252));
this.setBorder(lb);
}
this.setLayout(p.getLayout());
this.add(p.getNamePnl(),BorderLayout.NORTH);
this.add(p.getKdnrPnl(), BorderLayout.CENTER);
return this;
}
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.