JTree TreeCellRenderer不突出顯示選擇

Question

我爲一個JTree文件編寫了一個樹渲染器，它可以在第一次創建樹時設置背景顏色，但不會突出顯示選擇。

private class CustomTreeCellRenderer extends DefaultTreeCellRenderer{ 
    @Override 
    public Component getTreeCellRendererComponent(JTree tree, Object value,boolean sel, boolean expanded, boolean leaf, int row, boolean hasFocus){ 
     if(value instanceof DefaultMutableTreeNode){ 
      setText(FileSystemView.getFileSystemView().getSystemDisplayName((File) ((DefaultMutableTreeNode) value).getUserObject())); 
      setIcon(FileSystemView.getFileSystemView().getSystemIcon((File) ((DefaultMutableTreeNode) value).getUserObject())); 
     } 
     super.setBackgroundSelectionColor(Color.BLUE); 
     if(selected){ 
      super.setBackground(Color.gray); 
      setForeground(getTextSelectionColor()); 
     }else{ 
      super.setBackground(Color.CYAN); 
      setForeground(getTextNonSelectionColor()); 
     } 
     this.setOpaque(true); 
     return this; 
    } 
} 

加入

super.getTreeCellRendererComponent 

解決了這個問題。

Answer 1

內getTreeCellRendererComponent，第一個電話應該是

super.getTreeCellRendererComponent(arguments);