带有 ImageIcon 列的 Java JTable TableCellRenderer

发布于 2024-10-04 23:26:31 字数 1012 浏览 4 评论 0原文

我有一个带有自定义表格模型的表格，其中有两列。第 0 列是 ImageIcon 类，第 1 列是 String 类。

public Class<?> getColumnClass(int col) {
    if (col == 0) {
        return ImageIcon.class;
    } else {
        return String.class;
    }
}

当我定义要添加到列中的新 TableCellRenderer 类以便可以设置单元格样式时，它会覆盖 ImageIcon 类并将其设置为字符串。

public class CustomTableCellRenderer extends DefaultTableCellRenderer
{
    public Component getTableCellRendererComponent (JTable table, Object obj, boolean isSelected,     boolean hasFocus, int row, int 
    column)
    {
    Component cell = super.getTableCellRendererComponent(table, 
      obj, isSelected, hasFocus, row, column);
    if(isSelected)
     cell.setBackground(Color.BLUE);
    return cell;
    }
}

关于如何解决这个问题有什么想法吗？

我的错误，它有点隐藏：

当我定义要添加到列中的新 TableCellRenderer 类以便设置单元格样式时，它会覆盖 ImageIcon 类并将其设置为字符串。

所以问题是，当我定义这个 TableCellRenderer 类来设置表格样式时，表格中的 ImageIcon 列会变成“File:...”之类的字符串，而不是实际的图标。

原文

I have a table with a custom table model which has two columns. Column 0 is an ImageIcon class, and Column 1 is a String class.

public Class<?> getColumnClass(int col) {
    if (col == 0) {
        return ImageIcon.class;
    } else {
        return String.class;
    }
}

When I define a new TableCellRenderer class to be added to the columns so I can style the cells, it overwrites the ImageIcon class and sets it to a String.

public class CustomTableCellRenderer extends DefaultTableCellRenderer
{
    public Component getTableCellRendererComponent (JTable table, Object obj, boolean isSelected,     boolean hasFocus, int row, int 
    column)
    {
    Component cell = super.getTableCellRendererComponent(table, 
      obj, isSelected, hasFocus, row, column);
    if(isSelected)
     cell.setBackground(Color.BLUE);
    return cell;
    }
}

Any ideas on how to fix this?

My mistake, it is sort of hidden:

When I define a new TableCellRenderer class to be added to the columns so I can style the cells, it overwrites the ImageIcon class and sets it to a String.

So the problem is that, when I define this TableCellRenderer class to style my table, the ImageIcon columns in my table turn to Strings like "File:..." instead of the actual icon.

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萌吟 2024-10-11 23:26:32

无需创建自定义渲染器。 JTable allready 支持包含图标的列的默认渲染器。您需要做的就是重写 getColumnClass() 方法，您似乎正在这样做。

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牵你手 2024-10-11 23:26:32

另一种可能的解决方案是自己设置图标。我不确定这是否是最好的解决方案，但它有效：

   public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
            boolean hasFocus, int row, int column) {
      Component cell = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row,
               column);
      ((JLabel)cell).setIcon((Icon)value);
      ((JLabel)cell).setText("");
      ((JLabel)cell).setHorizontalAlignment(JLabel.CENTER);
      if (isSelected) {
         cell.setBackground(Color.blue);
      } else {
         cell.setBackground(null);
      }
      return cell;
   }

Another possible solution is to just set the icon yourself. I'm not sure if this is the best solution, but it works:

   public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
            boolean hasFocus, int row, int column) {
      Component cell = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row,
               column);
      ((JLabel)cell).setIcon((Icon)value);
      ((JLabel)cell).setText("");
      ((JLabel)cell).setHorizontalAlignment(JLabel.CENTER);
      if (isSelected) {
         cell.setBackground(Color.blue);
      } else {
         cell.setBackground(null);
      }
      return cell;
   }

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